2 * Copyright © 2008 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
24 * Keith Packard <keithp@keithp.com>
28 #include <linux/i2c.h>
29 #include <linux/slab.h>
30 #include <linux/export.h>
31 #include <linux/types.h>
32 #include <linux/notifier.h>
33 #include <linux/reboot.h>
34 #include <asm/byteorder.h>
36 #include <drm/drm_atomic_helper.h>
37 #include <drm/drm_crtc.h>
38 #include <drm/drm_crtc_helper.h>
39 #include <drm/drm_edid.h>
40 #include "intel_drv.h"
41 #include <drm/i915_drm.h>
44 #define DP_LINK_CHECK_TIMEOUT (10 * 1000)
46 /* Compliance test status bits */
47 #define INTEL_DP_RESOLUTION_SHIFT_MASK 0
48 #define INTEL_DP_RESOLUTION_PREFERRED (1 << INTEL_DP_RESOLUTION_SHIFT_MASK)
49 #define INTEL_DP_RESOLUTION_STANDARD (2 << INTEL_DP_RESOLUTION_SHIFT_MASK)
50 #define INTEL_DP_RESOLUTION_FAILSAFE (3 << INTEL_DP_RESOLUTION_SHIFT_MASK)
57 static const struct dp_link_dpll gen4_dpll
[] = {
59 { .p1
= 2, .p2
= 10, .n
= 2, .m1
= 23, .m2
= 8 } },
61 { .p1
= 1, .p2
= 10, .n
= 1, .m1
= 14, .m2
= 2 } }
64 static const struct dp_link_dpll pch_dpll
[] = {
66 { .p1
= 2, .p2
= 10, .n
= 1, .m1
= 12, .m2
= 9 } },
68 { .p1
= 1, .p2
= 10, .n
= 2, .m1
= 14, .m2
= 8 } }
71 static const struct dp_link_dpll vlv_dpll
[] = {
73 { .p1
= 3, .p2
= 2, .n
= 5, .m1
= 3, .m2
= 81 } },
75 { .p1
= 2, .p2
= 2, .n
= 1, .m1
= 2, .m2
= 27 } }
79 * CHV supports eDP 1.4 that have more link rates.
80 * Below only provides the fixed rate but exclude variable rate.
82 static const struct dp_link_dpll chv_dpll
[] = {
84 * CHV requires to program fractional division for m2.
85 * m2 is stored in fixed point format using formula below
86 * (m2_int << 22) | m2_fraction
88 { 162000, /* m2_int = 32, m2_fraction = 1677722 */
89 { .p1
= 4, .p2
= 2, .n
= 1, .m1
= 2, .m2
= 0x819999a } },
90 { 270000, /* m2_int = 27, m2_fraction = 0 */
91 { .p1
= 4, .p2
= 1, .n
= 1, .m1
= 2, .m2
= 0x6c00000 } },
92 { 540000, /* m2_int = 27, m2_fraction = 0 */
93 { .p1
= 2, .p2
= 1, .n
= 1, .m1
= 2, .m2
= 0x6c00000 } }
96 static const int bxt_rates
[] = { 162000, 216000, 243000, 270000,
97 324000, 432000, 540000 };
98 static const int skl_rates
[] = { 162000, 216000, 270000,
99 324000, 432000, 540000 };
100 static const int default_rates
[] = { 162000, 270000, 540000 };
103 * is_edp - is the given port attached to an eDP panel (either CPU or PCH)
104 * @intel_dp: DP struct
106 * If a CPU or PCH DP output is attached to an eDP panel, this function
107 * will return true, and false otherwise.
109 static bool is_edp(struct intel_dp
*intel_dp
)
111 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
113 return intel_dig_port
->base
.type
== INTEL_OUTPUT_EDP
;
116 static struct drm_device
*intel_dp_to_dev(struct intel_dp
*intel_dp
)
118 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
120 return intel_dig_port
->base
.base
.dev
;
123 static struct intel_dp
*intel_attached_dp(struct drm_connector
*connector
)
125 return enc_to_intel_dp(&intel_attached_encoder(connector
)->base
);
128 static void intel_dp_link_down(struct intel_dp
*intel_dp
);
129 static bool edp_panel_vdd_on(struct intel_dp
*intel_dp
);
130 static void edp_panel_vdd_off(struct intel_dp
*intel_dp
, bool sync
);
131 static void vlv_init_panel_power_sequencer(struct intel_dp
*intel_dp
);
132 static void vlv_steal_power_sequencer(struct drm_device
*dev
,
134 static void intel_dp_unset_edid(struct intel_dp
*intel_dp
);
136 static int intel_dp_num_rates(u8 link_bw_code
)
138 switch (link_bw_code
) {
140 WARN(1, "invalid max DP link bw val %x, using 1.62Gbps\n",
142 case DP_LINK_BW_1_62
:
151 /* update sink rates from dpcd */
152 static void intel_dp_set_sink_rates(struct intel_dp
*intel_dp
)
156 num_rates
= intel_dp_num_rates(intel_dp
->dpcd
[DP_MAX_LINK_RATE
]);
158 for (i
= 0; i
< num_rates
; i
++)
159 intel_dp
->sink_rates
[i
] = default_rates
[i
];
161 intel_dp
->num_sink_rates
= num_rates
;
164 /* Theoretical max between source and sink */
165 static int intel_dp_max_common_rate(struct intel_dp
*intel_dp
)
167 return intel_dp
->common_rates
[intel_dp
->num_common_rates
- 1];
170 /* Theoretical max between source and sink */
171 static int intel_dp_max_common_lane_count(struct intel_dp
*intel_dp
)
173 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
174 int source_max
= intel_dig_port
->max_lanes
;
175 int sink_max
= drm_dp_max_lane_count(intel_dp
->dpcd
);
177 return min(source_max
, sink_max
);
180 int intel_dp_max_lane_count(struct intel_dp
*intel_dp
)
182 return intel_dp
->max_link_lane_count
;
186 intel_dp_link_required(int pixel_clock
, int bpp
)
188 /* pixel_clock is in kHz, divide bpp by 8 for bit to Byte conversion */
189 return DIV_ROUND_UP(pixel_clock
* bpp
, 8);
193 intel_dp_max_data_rate(int max_link_clock
, int max_lanes
)
195 /* max_link_clock is the link symbol clock (LS_Clk) in kHz and not the
196 * link rate that is generally expressed in Gbps. Since, 8 bits of data
197 * is transmitted every LS_Clk per lane, there is no need to account for
198 * the channel encoding that is done in the PHY layer here.
201 return max_link_clock
* max_lanes
;
205 intel_dp_downstream_max_dotclock(struct intel_dp
*intel_dp
)
207 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
208 struct intel_encoder
*encoder
= &intel_dig_port
->base
;
209 struct drm_i915_private
*dev_priv
= to_i915(encoder
->base
.dev
);
210 int max_dotclk
= dev_priv
->max_dotclk_freq
;
213 int type
= intel_dp
->downstream_ports
[0] & DP_DS_PORT_TYPE_MASK
;
215 if (type
!= DP_DS_PORT_TYPE_VGA
)
218 ds_max_dotclk
= drm_dp_downstream_max_clock(intel_dp
->dpcd
,
219 intel_dp
->downstream_ports
);
221 if (ds_max_dotclk
!= 0)
222 max_dotclk
= min(max_dotclk
, ds_max_dotclk
);
228 intel_dp_set_source_rates(struct intel_dp
*intel_dp
)
230 struct intel_digital_port
*dig_port
= dp_to_dig_port(intel_dp
);
231 struct drm_i915_private
*dev_priv
= to_i915(dig_port
->base
.base
.dev
);
232 const int *source_rates
;
235 /* This should only be done once */
236 WARN_ON(intel_dp
->source_rates
|| intel_dp
->num_source_rates
);
238 if (IS_GEN9_LP(dev_priv
)) {
239 source_rates
= bxt_rates
;
240 size
= ARRAY_SIZE(bxt_rates
);
241 } else if (IS_GEN9_BC(dev_priv
)) {
242 source_rates
= skl_rates
;
243 size
= ARRAY_SIZE(skl_rates
);
245 source_rates
= default_rates
;
246 size
= ARRAY_SIZE(default_rates
);
249 /* This depends on the fact that 5.4 is last value in the array */
250 if (!intel_dp_source_supports_hbr2(intel_dp
))
253 intel_dp
->source_rates
= source_rates
;
254 intel_dp
->num_source_rates
= size
;
257 static int intersect_rates(const int *source_rates
, int source_len
,
258 const int *sink_rates
, int sink_len
,
261 int i
= 0, j
= 0, k
= 0;
263 while (i
< source_len
&& j
< sink_len
) {
264 if (source_rates
[i
] == sink_rates
[j
]) {
265 if (WARN_ON(k
>= DP_MAX_SUPPORTED_RATES
))
267 common_rates
[k
] = source_rates
[i
];
271 } else if (source_rates
[i
] < sink_rates
[j
]) {
280 /* return index of rate in rates array, or -1 if not found */
281 static int intel_dp_rate_index(const int *rates
, int len
, int rate
)
285 for (i
= 0; i
< len
; i
++)
286 if (rate
== rates
[i
])
292 static void intel_dp_set_common_rates(struct intel_dp
*intel_dp
)
294 WARN_ON(!intel_dp
->num_source_rates
|| !intel_dp
->num_sink_rates
);
296 intel_dp
->num_common_rates
= intersect_rates(intel_dp
->source_rates
,
297 intel_dp
->num_source_rates
,
298 intel_dp
->sink_rates
,
299 intel_dp
->num_sink_rates
,
300 intel_dp
->common_rates
);
302 /* Paranoia, there should always be something in common. */
303 if (WARN_ON(intel_dp
->num_common_rates
== 0)) {
304 intel_dp
->common_rates
[0] = default_rates
[0];
305 intel_dp
->num_common_rates
= 1;
309 /* get length of common rates potentially limited by max_rate */
310 static int intel_dp_common_len_rate_limit(struct intel_dp
*intel_dp
,
313 const int *common_rates
= intel_dp
->common_rates
;
314 int i
, common_len
= intel_dp
->num_common_rates
;
316 /* Limit results by potentially reduced max rate */
317 for (i
= 0; i
< common_len
; i
++) {
318 if (common_rates
[common_len
- i
- 1] <= max_rate
)
319 return common_len
- i
;
325 static bool intel_dp_link_params_valid(struct intel_dp
*intel_dp
)
328 * FIXME: we need to synchronize the current link parameters with
329 * hardware readout. Currently fast link training doesn't work on
332 if (intel_dp
->link_rate
== 0 ||
333 intel_dp
->link_rate
> intel_dp
->max_link_rate
)
336 if (intel_dp
->lane_count
== 0 ||
337 intel_dp
->lane_count
> intel_dp_max_lane_count(intel_dp
))
343 int intel_dp_get_link_train_fallback_values(struct intel_dp
*intel_dp
,
344 int link_rate
, uint8_t lane_count
)
348 index
= intel_dp_rate_index(intel_dp
->common_rates
,
349 intel_dp
->num_common_rates
,
352 intel_dp
->max_link_rate
= intel_dp
->common_rates
[index
- 1];
353 intel_dp
->max_link_lane_count
= lane_count
;
354 } else if (lane_count
> 1) {
355 intel_dp
->max_link_rate
= intel_dp_max_common_rate(intel_dp
);
356 intel_dp
->max_link_lane_count
= lane_count
>> 1;
358 DRM_ERROR("Link Training Unsuccessful\n");
365 static enum drm_mode_status
366 intel_dp_mode_valid(struct drm_connector
*connector
,
367 struct drm_display_mode
*mode
)
369 struct intel_dp
*intel_dp
= intel_attached_dp(connector
);
370 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
371 struct drm_display_mode
*fixed_mode
= intel_connector
->panel
.fixed_mode
;
372 int target_clock
= mode
->clock
;
373 int max_rate
, mode_rate
, max_lanes
, max_link_clock
;
376 max_dotclk
= intel_dp_downstream_max_dotclock(intel_dp
);
378 if (is_edp(intel_dp
) && fixed_mode
) {
379 if (mode
->hdisplay
> fixed_mode
->hdisplay
)
382 if (mode
->vdisplay
> fixed_mode
->vdisplay
)
385 target_clock
= fixed_mode
->clock
;
388 max_link_clock
= intel_dp_max_link_rate(intel_dp
);
389 max_lanes
= intel_dp_max_lane_count(intel_dp
);
391 max_rate
= intel_dp_max_data_rate(max_link_clock
, max_lanes
);
392 mode_rate
= intel_dp_link_required(target_clock
, 18);
394 if (mode_rate
> max_rate
|| target_clock
> max_dotclk
)
395 return MODE_CLOCK_HIGH
;
397 if (mode
->clock
< 10000)
398 return MODE_CLOCK_LOW
;
400 if (mode
->flags
& DRM_MODE_FLAG_DBLCLK
)
401 return MODE_H_ILLEGAL
;
406 uint32_t intel_dp_pack_aux(const uint8_t *src
, int src_bytes
)
413 for (i
= 0; i
< src_bytes
; i
++)
414 v
|= ((uint32_t) src
[i
]) << ((3-i
) * 8);
418 static void intel_dp_unpack_aux(uint32_t src
, uint8_t *dst
, int dst_bytes
)
423 for (i
= 0; i
< dst_bytes
; i
++)
424 dst
[i
] = src
>> ((3-i
) * 8);
428 intel_dp_init_panel_power_sequencer(struct drm_device
*dev
,
429 struct intel_dp
*intel_dp
);
431 intel_dp_init_panel_power_sequencer_registers(struct drm_device
*dev
,
432 struct intel_dp
*intel_dp
,
433 bool force_disable_vdd
);
435 intel_dp_pps_init(struct drm_device
*dev
, struct intel_dp
*intel_dp
);
437 static void pps_lock(struct intel_dp
*intel_dp
)
439 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
440 struct intel_encoder
*encoder
= &intel_dig_port
->base
;
441 struct drm_device
*dev
= encoder
->base
.dev
;
442 struct drm_i915_private
*dev_priv
= to_i915(dev
);
445 * See vlv_power_sequencer_reset() why we need
446 * a power domain reference here.
448 intel_display_power_get(dev_priv
, intel_dp
->aux_power_domain
);
450 mutex_lock(&dev_priv
->pps_mutex
);
453 static void pps_unlock(struct intel_dp
*intel_dp
)
455 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
456 struct intel_encoder
*encoder
= &intel_dig_port
->base
;
457 struct drm_device
*dev
= encoder
->base
.dev
;
458 struct drm_i915_private
*dev_priv
= to_i915(dev
);
460 mutex_unlock(&dev_priv
->pps_mutex
);
462 intel_display_power_put(dev_priv
, intel_dp
->aux_power_domain
);
466 vlv_power_sequencer_kick(struct intel_dp
*intel_dp
)
468 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
469 struct drm_i915_private
*dev_priv
= to_i915(intel_dig_port
->base
.base
.dev
);
470 enum pipe pipe
= intel_dp
->pps_pipe
;
471 bool pll_enabled
, release_cl_override
= false;
472 enum dpio_phy phy
= DPIO_PHY(pipe
);
473 enum dpio_channel ch
= vlv_pipe_to_channel(pipe
);
476 if (WARN(I915_READ(intel_dp
->output_reg
) & DP_PORT_EN
,
477 "skipping pipe %c power seqeuncer kick due to port %c being active\n",
478 pipe_name(pipe
), port_name(intel_dig_port
->port
)))
481 DRM_DEBUG_KMS("kicking pipe %c power sequencer for port %c\n",
482 pipe_name(pipe
), port_name(intel_dig_port
->port
));
484 /* Preserve the BIOS-computed detected bit. This is
485 * supposed to be read-only.
487 DP
= I915_READ(intel_dp
->output_reg
) & DP_DETECTED
;
488 DP
|= DP_VOLTAGE_0_4
| DP_PRE_EMPHASIS_0
;
489 DP
|= DP_PORT_WIDTH(1);
490 DP
|= DP_LINK_TRAIN_PAT_1
;
492 if (IS_CHERRYVIEW(dev_priv
))
493 DP
|= DP_PIPE_SELECT_CHV(pipe
);
494 else if (pipe
== PIPE_B
)
495 DP
|= DP_PIPEB_SELECT
;
497 pll_enabled
= I915_READ(DPLL(pipe
)) & DPLL_VCO_ENABLE
;
500 * The DPLL for the pipe must be enabled for this to work.
501 * So enable temporarily it if it's not already enabled.
504 release_cl_override
= IS_CHERRYVIEW(dev_priv
) &&
505 !chv_phy_powergate_ch(dev_priv
, phy
, ch
, true);
507 if (vlv_force_pll_on(dev_priv
, pipe
, IS_CHERRYVIEW(dev_priv
) ?
508 &chv_dpll
[0].dpll
: &vlv_dpll
[0].dpll
)) {
509 DRM_ERROR("Failed to force on pll for pipe %c!\n",
516 * Similar magic as in intel_dp_enable_port().
517 * We _must_ do this port enable + disable trick
518 * to make this power seqeuencer lock onto the port.
519 * Otherwise even VDD force bit won't work.
521 I915_WRITE(intel_dp
->output_reg
, DP
);
522 POSTING_READ(intel_dp
->output_reg
);
524 I915_WRITE(intel_dp
->output_reg
, DP
| DP_PORT_EN
);
525 POSTING_READ(intel_dp
->output_reg
);
527 I915_WRITE(intel_dp
->output_reg
, DP
& ~DP_PORT_EN
);
528 POSTING_READ(intel_dp
->output_reg
);
531 vlv_force_pll_off(dev_priv
, pipe
);
533 if (release_cl_override
)
534 chv_phy_powergate_ch(dev_priv
, phy
, ch
, false);
538 static enum pipe
vlv_find_free_pps(struct drm_i915_private
*dev_priv
)
540 struct intel_encoder
*encoder
;
541 unsigned int pipes
= (1 << PIPE_A
) | (1 << PIPE_B
);
544 * We don't have power sequencer currently.
545 * Pick one that's not used by other ports.
547 for_each_intel_encoder(&dev_priv
->drm
, encoder
) {
548 struct intel_dp
*intel_dp
;
550 if (encoder
->type
!= INTEL_OUTPUT_DP
&&
551 encoder
->type
!= INTEL_OUTPUT_EDP
)
554 intel_dp
= enc_to_intel_dp(&encoder
->base
);
556 if (encoder
->type
== INTEL_OUTPUT_EDP
) {
557 WARN_ON(intel_dp
->active_pipe
!= INVALID_PIPE
&&
558 intel_dp
->active_pipe
!= intel_dp
->pps_pipe
);
560 if (intel_dp
->pps_pipe
!= INVALID_PIPE
)
561 pipes
&= ~(1 << intel_dp
->pps_pipe
);
563 WARN_ON(intel_dp
->pps_pipe
!= INVALID_PIPE
);
565 if (intel_dp
->active_pipe
!= INVALID_PIPE
)
566 pipes
&= ~(1 << intel_dp
->active_pipe
);
573 return ffs(pipes
) - 1;
577 vlv_power_sequencer_pipe(struct intel_dp
*intel_dp
)
579 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
580 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
581 struct drm_i915_private
*dev_priv
= to_i915(dev
);
584 lockdep_assert_held(&dev_priv
->pps_mutex
);
586 /* We should never land here with regular DP ports */
587 WARN_ON(!is_edp(intel_dp
));
589 WARN_ON(intel_dp
->active_pipe
!= INVALID_PIPE
&&
590 intel_dp
->active_pipe
!= intel_dp
->pps_pipe
);
592 if (intel_dp
->pps_pipe
!= INVALID_PIPE
)
593 return intel_dp
->pps_pipe
;
595 pipe
= vlv_find_free_pps(dev_priv
);
598 * Didn't find one. This should not happen since there
599 * are two power sequencers and up to two eDP ports.
601 if (WARN_ON(pipe
== INVALID_PIPE
))
604 vlv_steal_power_sequencer(dev
, pipe
);
605 intel_dp
->pps_pipe
= pipe
;
607 DRM_DEBUG_KMS("picked pipe %c power sequencer for port %c\n",
608 pipe_name(intel_dp
->pps_pipe
),
609 port_name(intel_dig_port
->port
));
611 /* init power sequencer on this pipe and port */
612 intel_dp_init_panel_power_sequencer(dev
, intel_dp
);
613 intel_dp_init_panel_power_sequencer_registers(dev
, intel_dp
, true);
616 * Even vdd force doesn't work until we've made
617 * the power sequencer lock in on the port.
619 vlv_power_sequencer_kick(intel_dp
);
621 return intel_dp
->pps_pipe
;
625 bxt_power_sequencer_idx(struct intel_dp
*intel_dp
)
627 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
628 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
629 struct drm_i915_private
*dev_priv
= to_i915(dev
);
631 lockdep_assert_held(&dev_priv
->pps_mutex
);
633 /* We should never land here with regular DP ports */
634 WARN_ON(!is_edp(intel_dp
));
637 * TODO: BXT has 2 PPS instances. The correct port->PPS instance
638 * mapping needs to be retrieved from VBT, for now just hard-code to
639 * use instance #0 always.
641 if (!intel_dp
->pps_reset
)
644 intel_dp
->pps_reset
= false;
647 * Only the HW needs to be reprogrammed, the SW state is fixed and
648 * has been setup during connector init.
650 intel_dp_init_panel_power_sequencer_registers(dev
, intel_dp
, false);
655 typedef bool (*vlv_pipe_check
)(struct drm_i915_private
*dev_priv
,
658 static bool vlv_pipe_has_pp_on(struct drm_i915_private
*dev_priv
,
661 return I915_READ(PP_STATUS(pipe
)) & PP_ON
;
664 static bool vlv_pipe_has_vdd_on(struct drm_i915_private
*dev_priv
,
667 return I915_READ(PP_CONTROL(pipe
)) & EDP_FORCE_VDD
;
670 static bool vlv_pipe_any(struct drm_i915_private
*dev_priv
,
677 vlv_initial_pps_pipe(struct drm_i915_private
*dev_priv
,
679 vlv_pipe_check pipe_check
)
683 for (pipe
= PIPE_A
; pipe
<= PIPE_B
; pipe
++) {
684 u32 port_sel
= I915_READ(PP_ON_DELAYS(pipe
)) &
685 PANEL_PORT_SELECT_MASK
;
687 if (port_sel
!= PANEL_PORT_SELECT_VLV(port
))
690 if (!pipe_check(dev_priv
, pipe
))
700 vlv_initial_power_sequencer_setup(struct intel_dp
*intel_dp
)
702 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
703 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
704 struct drm_i915_private
*dev_priv
= to_i915(dev
);
705 enum port port
= intel_dig_port
->port
;
707 lockdep_assert_held(&dev_priv
->pps_mutex
);
709 /* try to find a pipe with this port selected */
710 /* first pick one where the panel is on */
711 intel_dp
->pps_pipe
= vlv_initial_pps_pipe(dev_priv
, port
,
713 /* didn't find one? pick one where vdd is on */
714 if (intel_dp
->pps_pipe
== INVALID_PIPE
)
715 intel_dp
->pps_pipe
= vlv_initial_pps_pipe(dev_priv
, port
,
716 vlv_pipe_has_vdd_on
);
717 /* didn't find one? pick one with just the correct port */
718 if (intel_dp
->pps_pipe
== INVALID_PIPE
)
719 intel_dp
->pps_pipe
= vlv_initial_pps_pipe(dev_priv
, port
,
722 /* didn't find one? just let vlv_power_sequencer_pipe() pick one when needed */
723 if (intel_dp
->pps_pipe
== INVALID_PIPE
) {
724 DRM_DEBUG_KMS("no initial power sequencer for port %c\n",
729 DRM_DEBUG_KMS("initial power sequencer for port %c: pipe %c\n",
730 port_name(port
), pipe_name(intel_dp
->pps_pipe
));
732 intel_dp_init_panel_power_sequencer(dev
, intel_dp
);
733 intel_dp_init_panel_power_sequencer_registers(dev
, intel_dp
, false);
736 void intel_power_sequencer_reset(struct drm_i915_private
*dev_priv
)
738 struct drm_device
*dev
= &dev_priv
->drm
;
739 struct intel_encoder
*encoder
;
741 if (WARN_ON(!IS_VALLEYVIEW(dev_priv
) && !IS_CHERRYVIEW(dev_priv
) &&
742 !IS_GEN9_LP(dev_priv
)))
746 * We can't grab pps_mutex here due to deadlock with power_domain
747 * mutex when power_domain functions are called while holding pps_mutex.
748 * That also means that in order to use pps_pipe the code needs to
749 * hold both a power domain reference and pps_mutex, and the power domain
750 * reference get/put must be done while _not_ holding pps_mutex.
751 * pps_{lock,unlock}() do these steps in the correct order, so one
752 * should use them always.
755 for_each_intel_encoder(dev
, encoder
) {
756 struct intel_dp
*intel_dp
;
758 if (encoder
->type
!= INTEL_OUTPUT_DP
&&
759 encoder
->type
!= INTEL_OUTPUT_EDP
)
762 intel_dp
= enc_to_intel_dp(&encoder
->base
);
764 WARN_ON(intel_dp
->active_pipe
!= INVALID_PIPE
);
766 if (encoder
->type
!= INTEL_OUTPUT_EDP
)
769 if (IS_GEN9_LP(dev_priv
))
770 intel_dp
->pps_reset
= true;
772 intel_dp
->pps_pipe
= INVALID_PIPE
;
776 struct pps_registers
{
784 static void intel_pps_get_registers(struct drm_i915_private
*dev_priv
,
785 struct intel_dp
*intel_dp
,
786 struct pps_registers
*regs
)
790 memset(regs
, 0, sizeof(*regs
));
792 if (IS_GEN9_LP(dev_priv
))
793 pps_idx
= bxt_power_sequencer_idx(intel_dp
);
794 else if (IS_VALLEYVIEW(dev_priv
) || IS_CHERRYVIEW(dev_priv
))
795 pps_idx
= vlv_power_sequencer_pipe(intel_dp
);
797 regs
->pp_ctrl
= PP_CONTROL(pps_idx
);
798 regs
->pp_stat
= PP_STATUS(pps_idx
);
799 regs
->pp_on
= PP_ON_DELAYS(pps_idx
);
800 regs
->pp_off
= PP_OFF_DELAYS(pps_idx
);
801 if (!IS_GEN9_LP(dev_priv
) && !HAS_PCH_CNP(dev_priv
))
802 regs
->pp_div
= PP_DIVISOR(pps_idx
);
806 _pp_ctrl_reg(struct intel_dp
*intel_dp
)
808 struct pps_registers regs
;
810 intel_pps_get_registers(to_i915(intel_dp_to_dev(intel_dp
)), intel_dp
,
817 _pp_stat_reg(struct intel_dp
*intel_dp
)
819 struct pps_registers regs
;
821 intel_pps_get_registers(to_i915(intel_dp_to_dev(intel_dp
)), intel_dp
,
827 /* Reboot notifier handler to shutdown panel power to guarantee T12 timing
828 This function only applicable when panel PM state is not to be tracked */
829 static int edp_notify_handler(struct notifier_block
*this, unsigned long code
,
832 struct intel_dp
*intel_dp
= container_of(this, typeof(* intel_dp
),
834 struct drm_device
*dev
= intel_dp_to_dev(intel_dp
);
835 struct drm_i915_private
*dev_priv
= to_i915(dev
);
837 if (!is_edp(intel_dp
) || code
!= SYS_RESTART
)
842 if (IS_VALLEYVIEW(dev_priv
) || IS_CHERRYVIEW(dev_priv
)) {
843 enum pipe pipe
= vlv_power_sequencer_pipe(intel_dp
);
844 i915_reg_t pp_ctrl_reg
, pp_div_reg
;
847 pp_ctrl_reg
= PP_CONTROL(pipe
);
848 pp_div_reg
= PP_DIVISOR(pipe
);
849 pp_div
= I915_READ(pp_div_reg
);
850 pp_div
&= PP_REFERENCE_DIVIDER_MASK
;
852 /* 0x1F write to PP_DIV_REG sets max cycle delay */
853 I915_WRITE(pp_div_reg
, pp_div
| 0x1F);
854 I915_WRITE(pp_ctrl_reg
, PANEL_UNLOCK_REGS
| PANEL_POWER_OFF
);
855 msleep(intel_dp
->panel_power_cycle_delay
);
858 pps_unlock(intel_dp
);
863 static bool edp_have_panel_power(struct intel_dp
*intel_dp
)
865 struct drm_device
*dev
= intel_dp_to_dev(intel_dp
);
866 struct drm_i915_private
*dev_priv
= to_i915(dev
);
868 lockdep_assert_held(&dev_priv
->pps_mutex
);
870 if ((IS_VALLEYVIEW(dev_priv
) || IS_CHERRYVIEW(dev_priv
)) &&
871 intel_dp
->pps_pipe
== INVALID_PIPE
)
874 return (I915_READ(_pp_stat_reg(intel_dp
)) & PP_ON
) != 0;
877 static bool edp_have_panel_vdd(struct intel_dp
*intel_dp
)
879 struct drm_device
*dev
= intel_dp_to_dev(intel_dp
);
880 struct drm_i915_private
*dev_priv
= to_i915(dev
);
882 lockdep_assert_held(&dev_priv
->pps_mutex
);
884 if ((IS_VALLEYVIEW(dev_priv
) || IS_CHERRYVIEW(dev_priv
)) &&
885 intel_dp
->pps_pipe
== INVALID_PIPE
)
888 return I915_READ(_pp_ctrl_reg(intel_dp
)) & EDP_FORCE_VDD
;
892 intel_dp_check_edp(struct intel_dp
*intel_dp
)
894 struct drm_device
*dev
= intel_dp_to_dev(intel_dp
);
895 struct drm_i915_private
*dev_priv
= to_i915(dev
);
897 if (!is_edp(intel_dp
))
900 if (!edp_have_panel_power(intel_dp
) && !edp_have_panel_vdd(intel_dp
)) {
901 WARN(1, "eDP powered off while attempting aux channel communication.\n");
902 DRM_DEBUG_KMS("Status 0x%08x Control 0x%08x\n",
903 I915_READ(_pp_stat_reg(intel_dp
)),
904 I915_READ(_pp_ctrl_reg(intel_dp
)));
909 intel_dp_aux_wait_done(struct intel_dp
*intel_dp
, bool has_aux_irq
)
911 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
912 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
913 struct drm_i915_private
*dev_priv
= to_i915(dev
);
914 i915_reg_t ch_ctl
= intel_dp
->aux_ch_ctl_reg
;
918 #define C (((status = I915_READ_NOTRACE(ch_ctl)) & DP_AUX_CH_CTL_SEND_BUSY) == 0)
920 done
= wait_event_timeout(dev_priv
->gmbus_wait_queue
, C
,
921 msecs_to_jiffies_timeout(10));
923 done
= wait_for(C
, 10) == 0;
925 DRM_ERROR("dp aux hw did not signal timeout (has irq: %i)!\n",
932 static uint32_t g4x_get_aux_clock_divider(struct intel_dp
*intel_dp
, int index
)
934 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
935 struct drm_i915_private
*dev_priv
= to_i915(intel_dig_port
->base
.base
.dev
);
941 * The clock divider is based off the hrawclk, and would like to run at
942 * 2MHz. So, take the hrawclk value and divide by 2000 and use that
944 return DIV_ROUND_CLOSEST(dev_priv
->rawclk_freq
, 2000);
947 static uint32_t ilk_get_aux_clock_divider(struct intel_dp
*intel_dp
, int index
)
949 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
950 struct drm_i915_private
*dev_priv
= to_i915(intel_dig_port
->base
.base
.dev
);
956 * The clock divider is based off the cdclk or PCH rawclk, and would
957 * like to run at 2MHz. So, take the cdclk or PCH rawclk value and
958 * divide by 2000 and use that
960 if (intel_dig_port
->port
== PORT_A
)
961 return DIV_ROUND_CLOSEST(dev_priv
->cdclk
.hw
.cdclk
, 2000);
963 return DIV_ROUND_CLOSEST(dev_priv
->rawclk_freq
, 2000);
966 static uint32_t hsw_get_aux_clock_divider(struct intel_dp
*intel_dp
, int index
)
968 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
969 struct drm_i915_private
*dev_priv
= to_i915(intel_dig_port
->base
.base
.dev
);
971 if (intel_dig_port
->port
!= PORT_A
&& HAS_PCH_LPT_H(dev_priv
)) {
972 /* Workaround for non-ULT HSW */
980 return ilk_get_aux_clock_divider(intel_dp
, index
);
983 static uint32_t skl_get_aux_clock_divider(struct intel_dp
*intel_dp
, int index
)
986 * SKL doesn't need us to program the AUX clock divider (Hardware will
987 * derive the clock from CDCLK automatically). We still implement the
988 * get_aux_clock_divider vfunc to plug-in into the existing code.
990 return index
? 0 : 1;
993 static uint32_t g4x_get_aux_send_ctl(struct intel_dp
*intel_dp
,
996 uint32_t aux_clock_divider
)
998 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
999 struct drm_i915_private
*dev_priv
=
1000 to_i915(intel_dig_port
->base
.base
.dev
);
1001 uint32_t precharge
, timeout
;
1003 if (IS_GEN6(dev_priv
))
1008 if (IS_BROADWELL(dev_priv
) && intel_dig_port
->port
== PORT_A
)
1009 timeout
= DP_AUX_CH_CTL_TIME_OUT_600us
;
1011 timeout
= DP_AUX_CH_CTL_TIME_OUT_400us
;
1013 return DP_AUX_CH_CTL_SEND_BUSY
|
1014 DP_AUX_CH_CTL_DONE
|
1015 (has_aux_irq
? DP_AUX_CH_CTL_INTERRUPT
: 0) |
1016 DP_AUX_CH_CTL_TIME_OUT_ERROR
|
1018 DP_AUX_CH_CTL_RECEIVE_ERROR
|
1019 (send_bytes
<< DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT
) |
1020 (precharge
<< DP_AUX_CH_CTL_PRECHARGE_2US_SHIFT
) |
1021 (aux_clock_divider
<< DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT
);
1024 static uint32_t skl_get_aux_send_ctl(struct intel_dp
*intel_dp
,
1029 return DP_AUX_CH_CTL_SEND_BUSY
|
1030 DP_AUX_CH_CTL_DONE
|
1031 (has_aux_irq
? DP_AUX_CH_CTL_INTERRUPT
: 0) |
1032 DP_AUX_CH_CTL_TIME_OUT_ERROR
|
1033 DP_AUX_CH_CTL_TIME_OUT_1600us
|
1034 DP_AUX_CH_CTL_RECEIVE_ERROR
|
1035 (send_bytes
<< DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT
) |
1036 DP_AUX_CH_CTL_FW_SYNC_PULSE_SKL(32) |
1037 DP_AUX_CH_CTL_SYNC_PULSE_SKL(32);
1041 intel_dp_aux_ch(struct intel_dp
*intel_dp
,
1042 const uint8_t *send
, int send_bytes
,
1043 uint8_t *recv
, int recv_size
)
1045 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
1046 struct drm_i915_private
*dev_priv
=
1047 to_i915(intel_dig_port
->base
.base
.dev
);
1048 i915_reg_t ch_ctl
= intel_dp
->aux_ch_ctl_reg
;
1049 uint32_t aux_clock_divider
;
1050 int i
, ret
, recv_bytes
;
1053 bool has_aux_irq
= HAS_AUX_IRQ(dev_priv
);
1059 * We will be called with VDD already enabled for dpcd/edid/oui reads.
1060 * In such cases we want to leave VDD enabled and it's up to upper layers
1061 * to turn it off. But for eg. i2c-dev access we need to turn it on/off
1064 vdd
= edp_panel_vdd_on(intel_dp
);
1066 /* dp aux is extremely sensitive to irq latency, hence request the
1067 * lowest possible wakeup latency and so prevent the cpu from going into
1068 * deep sleep states.
1070 pm_qos_update_request(&dev_priv
->pm_qos
, 0);
1072 intel_dp_check_edp(intel_dp
);
1074 /* Try to wait for any previous AUX channel activity */
1075 for (try = 0; try < 3; try++) {
1076 status
= I915_READ_NOTRACE(ch_ctl
);
1077 if ((status
& DP_AUX_CH_CTL_SEND_BUSY
) == 0)
1083 static u32 last_status
= -1;
1084 const u32 status
= I915_READ(ch_ctl
);
1086 if (status
!= last_status
) {
1087 WARN(1, "dp_aux_ch not started status 0x%08x\n",
1089 last_status
= status
;
1096 /* Only 5 data registers! */
1097 if (WARN_ON(send_bytes
> 20 || recv_size
> 20)) {
1102 while ((aux_clock_divider
= intel_dp
->get_aux_clock_divider(intel_dp
, clock
++))) {
1103 u32 send_ctl
= intel_dp
->get_aux_send_ctl(intel_dp
,
1108 /* Must try at least 3 times according to DP spec */
1109 for (try = 0; try < 5; try++) {
1110 /* Load the send data into the aux channel data registers */
1111 for (i
= 0; i
< send_bytes
; i
+= 4)
1112 I915_WRITE(intel_dp
->aux_ch_data_reg
[i
>> 2],
1113 intel_dp_pack_aux(send
+ i
,
1116 /* Send the command and wait for it to complete */
1117 I915_WRITE(ch_ctl
, send_ctl
);
1119 status
= intel_dp_aux_wait_done(intel_dp
, has_aux_irq
);
1121 /* Clear done status and any errors */
1124 DP_AUX_CH_CTL_DONE
|
1125 DP_AUX_CH_CTL_TIME_OUT_ERROR
|
1126 DP_AUX_CH_CTL_RECEIVE_ERROR
);
1128 if (status
& DP_AUX_CH_CTL_TIME_OUT_ERROR
)
1131 /* DP CTS 1.2 Core Rev 1.1, 4.2.1.1 & 4.2.1.2
1132 * 400us delay required for errors and timeouts
1133 * Timeout errors from the HW already meet this
1134 * requirement so skip to next iteration
1136 if (status
& DP_AUX_CH_CTL_RECEIVE_ERROR
) {
1137 usleep_range(400, 500);
1140 if (status
& DP_AUX_CH_CTL_DONE
)
1145 if ((status
& DP_AUX_CH_CTL_DONE
) == 0) {
1146 DRM_ERROR("dp_aux_ch not done status 0x%08x\n", status
);
1152 /* Check for timeout or receive error.
1153 * Timeouts occur when the sink is not connected
1155 if (status
& DP_AUX_CH_CTL_RECEIVE_ERROR
) {
1156 DRM_ERROR("dp_aux_ch receive error status 0x%08x\n", status
);
1161 /* Timeouts occur when the device isn't connected, so they're
1162 * "normal" -- don't fill the kernel log with these */
1163 if (status
& DP_AUX_CH_CTL_TIME_OUT_ERROR
) {
1164 DRM_DEBUG_KMS("dp_aux_ch timeout status 0x%08x\n", status
);
1169 /* Unload any bytes sent back from the other side */
1170 recv_bytes
= ((status
& DP_AUX_CH_CTL_MESSAGE_SIZE_MASK
) >>
1171 DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT
);
1174 * By BSpec: "Message sizes of 0 or >20 are not allowed."
1175 * We have no idea of what happened so we return -EBUSY so
1176 * drm layer takes care for the necessary retries.
1178 if (recv_bytes
== 0 || recv_bytes
> 20) {
1179 DRM_DEBUG_KMS("Forbidden recv_bytes = %d on aux transaction\n",
1182 * FIXME: This patch was created on top of a series that
1183 * organize the retries at drm level. There EBUSY should
1184 * also take care for 1ms wait before retrying.
1185 * That aux retries re-org is still needed and after that is
1186 * merged we remove this sleep from here.
1188 usleep_range(1000, 1500);
1193 if (recv_bytes
> recv_size
)
1194 recv_bytes
= recv_size
;
1196 for (i
= 0; i
< recv_bytes
; i
+= 4)
1197 intel_dp_unpack_aux(I915_READ(intel_dp
->aux_ch_data_reg
[i
>> 2]),
1198 recv
+ i
, recv_bytes
- i
);
1202 pm_qos_update_request(&dev_priv
->pm_qos
, PM_QOS_DEFAULT_VALUE
);
1205 edp_panel_vdd_off(intel_dp
, false);
1207 pps_unlock(intel_dp
);
1212 #define BARE_ADDRESS_SIZE 3
1213 #define HEADER_SIZE (BARE_ADDRESS_SIZE + 1)
1215 intel_dp_aux_transfer(struct drm_dp_aux
*aux
, struct drm_dp_aux_msg
*msg
)
1217 struct intel_dp
*intel_dp
= container_of(aux
, struct intel_dp
, aux
);
1218 uint8_t txbuf
[20], rxbuf
[20];
1219 size_t txsize
, rxsize
;
1222 txbuf
[0] = (msg
->request
<< 4) |
1223 ((msg
->address
>> 16) & 0xf);
1224 txbuf
[1] = (msg
->address
>> 8) & 0xff;
1225 txbuf
[2] = msg
->address
& 0xff;
1226 txbuf
[3] = msg
->size
- 1;
1228 switch (msg
->request
& ~DP_AUX_I2C_MOT
) {
1229 case DP_AUX_NATIVE_WRITE
:
1230 case DP_AUX_I2C_WRITE
:
1231 case DP_AUX_I2C_WRITE_STATUS_UPDATE
:
1232 txsize
= msg
->size
? HEADER_SIZE
+ msg
->size
: BARE_ADDRESS_SIZE
;
1233 rxsize
= 2; /* 0 or 1 data bytes */
1235 if (WARN_ON(txsize
> 20))
1238 WARN_ON(!msg
->buffer
!= !msg
->size
);
1241 memcpy(txbuf
+ HEADER_SIZE
, msg
->buffer
, msg
->size
);
1243 ret
= intel_dp_aux_ch(intel_dp
, txbuf
, txsize
, rxbuf
, rxsize
);
1245 msg
->reply
= rxbuf
[0] >> 4;
1248 /* Number of bytes written in a short write. */
1249 ret
= clamp_t(int, rxbuf
[1], 0, msg
->size
);
1251 /* Return payload size. */
1257 case DP_AUX_NATIVE_READ
:
1258 case DP_AUX_I2C_READ
:
1259 txsize
= msg
->size
? HEADER_SIZE
: BARE_ADDRESS_SIZE
;
1260 rxsize
= msg
->size
+ 1;
1262 if (WARN_ON(rxsize
> 20))
1265 ret
= intel_dp_aux_ch(intel_dp
, txbuf
, txsize
, rxbuf
, rxsize
);
1267 msg
->reply
= rxbuf
[0] >> 4;
1269 * Assume happy day, and copy the data. The caller is
1270 * expected to check msg->reply before touching it.
1272 * Return payload size.
1275 memcpy(msg
->buffer
, rxbuf
+ 1, ret
);
1287 static enum port
intel_aux_port(struct drm_i915_private
*dev_priv
,
1290 const struct ddi_vbt_port_info
*info
=
1291 &dev_priv
->vbt
.ddi_port_info
[port
];
1294 if (!info
->alternate_aux_channel
) {
1295 DRM_DEBUG_KMS("using AUX %c for port %c (platform default)\n",
1296 port_name(port
), port_name(port
));
1300 switch (info
->alternate_aux_channel
) {
1314 MISSING_CASE(info
->alternate_aux_channel
);
1319 DRM_DEBUG_KMS("using AUX %c for port %c (VBT)\n",
1320 port_name(aux_port
), port_name(port
));
1325 static i915_reg_t
g4x_aux_ctl_reg(struct drm_i915_private
*dev_priv
,
1332 return DP_AUX_CH_CTL(port
);
1335 return DP_AUX_CH_CTL(PORT_B
);
1339 static i915_reg_t
g4x_aux_data_reg(struct drm_i915_private
*dev_priv
,
1340 enum port port
, int index
)
1346 return DP_AUX_CH_DATA(port
, index
);
1349 return DP_AUX_CH_DATA(PORT_B
, index
);
1353 static i915_reg_t
ilk_aux_ctl_reg(struct drm_i915_private
*dev_priv
,
1358 return DP_AUX_CH_CTL(port
);
1362 return PCH_DP_AUX_CH_CTL(port
);
1365 return DP_AUX_CH_CTL(PORT_A
);
1369 static i915_reg_t
ilk_aux_data_reg(struct drm_i915_private
*dev_priv
,
1370 enum port port
, int index
)
1374 return DP_AUX_CH_DATA(port
, index
);
1378 return PCH_DP_AUX_CH_DATA(port
, index
);
1381 return DP_AUX_CH_DATA(PORT_A
, index
);
1385 static i915_reg_t
skl_aux_ctl_reg(struct drm_i915_private
*dev_priv
,
1393 return DP_AUX_CH_CTL(port
);
1396 return DP_AUX_CH_CTL(PORT_A
);
1400 static i915_reg_t
skl_aux_data_reg(struct drm_i915_private
*dev_priv
,
1401 enum port port
, int index
)
1408 return DP_AUX_CH_DATA(port
, index
);
1411 return DP_AUX_CH_DATA(PORT_A
, index
);
1415 static i915_reg_t
intel_aux_ctl_reg(struct drm_i915_private
*dev_priv
,
1418 if (INTEL_INFO(dev_priv
)->gen
>= 9)
1419 return skl_aux_ctl_reg(dev_priv
, port
);
1420 else if (HAS_PCH_SPLIT(dev_priv
))
1421 return ilk_aux_ctl_reg(dev_priv
, port
);
1423 return g4x_aux_ctl_reg(dev_priv
, port
);
1426 static i915_reg_t
intel_aux_data_reg(struct drm_i915_private
*dev_priv
,
1427 enum port port
, int index
)
1429 if (INTEL_INFO(dev_priv
)->gen
>= 9)
1430 return skl_aux_data_reg(dev_priv
, port
, index
);
1431 else if (HAS_PCH_SPLIT(dev_priv
))
1432 return ilk_aux_data_reg(dev_priv
, port
, index
);
1434 return g4x_aux_data_reg(dev_priv
, port
, index
);
1437 static void intel_aux_reg_init(struct intel_dp
*intel_dp
)
1439 struct drm_i915_private
*dev_priv
= to_i915(intel_dp_to_dev(intel_dp
));
1440 enum port port
= intel_aux_port(dev_priv
,
1441 dp_to_dig_port(intel_dp
)->port
);
1444 intel_dp
->aux_ch_ctl_reg
= intel_aux_ctl_reg(dev_priv
, port
);
1445 for (i
= 0; i
< ARRAY_SIZE(intel_dp
->aux_ch_data_reg
); i
++)
1446 intel_dp
->aux_ch_data_reg
[i
] = intel_aux_data_reg(dev_priv
, port
, i
);
1450 intel_dp_aux_fini(struct intel_dp
*intel_dp
)
1452 kfree(intel_dp
->aux
.name
);
1456 intel_dp_aux_init(struct intel_dp
*intel_dp
)
1458 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
1459 enum port port
= intel_dig_port
->port
;
1461 intel_aux_reg_init(intel_dp
);
1462 drm_dp_aux_init(&intel_dp
->aux
);
1464 /* Failure to allocate our preferred name is not critical */
1465 intel_dp
->aux
.name
= kasprintf(GFP_KERNEL
, "DPDDC-%c", port_name(port
));
1466 intel_dp
->aux
.transfer
= intel_dp_aux_transfer
;
1469 bool intel_dp_source_supports_hbr2(struct intel_dp
*intel_dp
)
1471 struct intel_digital_port
*dig_port
= dp_to_dig_port(intel_dp
);
1472 struct drm_i915_private
*dev_priv
= to_i915(dig_port
->base
.base
.dev
);
1474 if ((IS_HASWELL(dev_priv
) && !IS_HSW_ULX(dev_priv
)) ||
1475 IS_BROADWELL(dev_priv
) || (INTEL_GEN(dev_priv
) >= 9))
1482 intel_dp_set_clock(struct intel_encoder
*encoder
,
1483 struct intel_crtc_state
*pipe_config
)
1485 struct drm_device
*dev
= encoder
->base
.dev
;
1486 struct drm_i915_private
*dev_priv
= to_i915(dev
);
1487 const struct dp_link_dpll
*divisor
= NULL
;
1490 if (IS_G4X(dev_priv
)) {
1491 divisor
= gen4_dpll
;
1492 count
= ARRAY_SIZE(gen4_dpll
);
1493 } else if (HAS_PCH_SPLIT(dev_priv
)) {
1495 count
= ARRAY_SIZE(pch_dpll
);
1496 } else if (IS_CHERRYVIEW(dev_priv
)) {
1498 count
= ARRAY_SIZE(chv_dpll
);
1499 } else if (IS_VALLEYVIEW(dev_priv
)) {
1501 count
= ARRAY_SIZE(vlv_dpll
);
1504 if (divisor
&& count
) {
1505 for (i
= 0; i
< count
; i
++) {
1506 if (pipe_config
->port_clock
== divisor
[i
].clock
) {
1507 pipe_config
->dpll
= divisor
[i
].dpll
;
1508 pipe_config
->clock_set
= true;
1515 static void snprintf_int_array(char *str
, size_t len
,
1516 const int *array
, int nelem
)
1522 for (i
= 0; i
< nelem
; i
++) {
1523 int r
= snprintf(str
, len
, "%s%d", i
? ", " : "", array
[i
]);
1531 static void intel_dp_print_rates(struct intel_dp
*intel_dp
)
1533 char str
[128]; /* FIXME: too big for stack? */
1535 if ((drm_debug
& DRM_UT_KMS
) == 0)
1538 snprintf_int_array(str
, sizeof(str
),
1539 intel_dp
->source_rates
, intel_dp
->num_source_rates
);
1540 DRM_DEBUG_KMS("source rates: %s\n", str
);
1542 snprintf_int_array(str
, sizeof(str
),
1543 intel_dp
->sink_rates
, intel_dp
->num_sink_rates
);
1544 DRM_DEBUG_KMS("sink rates: %s\n", str
);
1546 snprintf_int_array(str
, sizeof(str
),
1547 intel_dp
->common_rates
, intel_dp
->num_common_rates
);
1548 DRM_DEBUG_KMS("common rates: %s\n", str
);
1552 intel_dp_max_link_rate(struct intel_dp
*intel_dp
)
1556 len
= intel_dp_common_len_rate_limit(intel_dp
, intel_dp
->max_link_rate
);
1557 if (WARN_ON(len
<= 0))
1560 return intel_dp
->common_rates
[len
- 1];
1563 int intel_dp_rate_select(struct intel_dp
*intel_dp
, int rate
)
1565 int i
= intel_dp_rate_index(intel_dp
->sink_rates
,
1566 intel_dp
->num_sink_rates
, rate
);
1574 void intel_dp_compute_rate(struct intel_dp
*intel_dp
, int port_clock
,
1575 uint8_t *link_bw
, uint8_t *rate_select
)
1577 /* eDP 1.4 rate select method. */
1578 if (intel_dp
->use_rate_select
) {
1581 intel_dp_rate_select(intel_dp
, port_clock
);
1583 *link_bw
= drm_dp_link_rate_to_bw_code(port_clock
);
1588 static int intel_dp_compute_bpp(struct intel_dp
*intel_dp
,
1589 struct intel_crtc_state
*pipe_config
)
1593 bpp
= pipe_config
->pipe_bpp
;
1594 bpc
= drm_dp_downstream_max_bpc(intel_dp
->dpcd
, intel_dp
->downstream_ports
);
1597 bpp
= min(bpp
, 3*bpc
);
1599 /* For DP Compliance we override the computed bpp for the pipe */
1600 if (intel_dp
->compliance
.test_data
.bpc
!= 0) {
1601 pipe_config
->pipe_bpp
= 3*intel_dp
->compliance
.test_data
.bpc
;
1602 pipe_config
->dither_force_disable
= pipe_config
->pipe_bpp
== 6*3;
1603 DRM_DEBUG_KMS("Setting pipe_bpp to %d\n",
1604 pipe_config
->pipe_bpp
);
1610 intel_dp_compute_config(struct intel_encoder
*encoder
,
1611 struct intel_crtc_state
*pipe_config
,
1612 struct drm_connector_state
*conn_state
)
1614 struct drm_i915_private
*dev_priv
= to_i915(encoder
->base
.dev
);
1615 struct drm_display_mode
*adjusted_mode
= &pipe_config
->base
.adjusted_mode
;
1616 struct intel_dp
*intel_dp
= enc_to_intel_dp(&encoder
->base
);
1617 enum port port
= dp_to_dig_port(intel_dp
)->port
;
1618 struct intel_crtc
*intel_crtc
= to_intel_crtc(pipe_config
->base
.crtc
);
1619 struct intel_connector
*intel_connector
= intel_dp
->attached_connector
;
1620 struct intel_digital_connector_state
*intel_conn_state
=
1621 to_intel_digital_connector_state(conn_state
);
1622 int lane_count
, clock
;
1623 int min_lane_count
= 1;
1624 int max_lane_count
= intel_dp_max_lane_count(intel_dp
);
1625 /* Conveniently, the link BW constants become indices with a shift...*/
1629 int link_avail
, link_clock
;
1631 uint8_t link_bw
, rate_select
;
1632 bool reduce_m_n
= drm_dp_has_quirk(&intel_dp
->desc
,
1633 DP_DPCD_QUIRK_LIMITED_M_N
);
1635 common_len
= intel_dp_common_len_rate_limit(intel_dp
,
1636 intel_dp
->max_link_rate
);
1638 /* No common link rates between source and sink */
1639 WARN_ON(common_len
<= 0);
1641 max_clock
= common_len
- 1;
1643 if (HAS_PCH_SPLIT(dev_priv
) && !HAS_DDI(dev_priv
) && port
!= PORT_A
)
1644 pipe_config
->has_pch_encoder
= true;
1646 pipe_config
->has_drrs
= false;
1648 pipe_config
->has_audio
= false;
1649 else if (intel_conn_state
->force_audio
== HDMI_AUDIO_AUTO
)
1650 pipe_config
->has_audio
= intel_dp
->has_audio
;
1652 pipe_config
->has_audio
= intel_conn_state
->force_audio
== HDMI_AUDIO_ON
;
1654 if (is_edp(intel_dp
) && intel_connector
->panel
.fixed_mode
) {
1655 intel_fixed_panel_mode(intel_connector
->panel
.fixed_mode
,
1658 if (INTEL_GEN(dev_priv
) >= 9) {
1660 ret
= skl_update_scaler_crtc(pipe_config
);
1665 if (HAS_GMCH_DISPLAY(dev_priv
))
1666 intel_gmch_panel_fitting(intel_crtc
, pipe_config
,
1667 conn_state
->scaling_mode
);
1669 intel_pch_panel_fitting(intel_crtc
, pipe_config
,
1670 conn_state
->scaling_mode
);
1673 if (adjusted_mode
->flags
& DRM_MODE_FLAG_DBLCLK
)
1676 /* Use values requested by Compliance Test Request */
1677 if (intel_dp
->compliance
.test_type
== DP_TEST_LINK_TRAINING
) {
1680 index
= intel_dp_rate_index(intel_dp
->common_rates
,
1681 intel_dp
->num_common_rates
,
1682 intel_dp
->compliance
.test_link_rate
);
1684 min_clock
= max_clock
= index
;
1685 min_lane_count
= max_lane_count
= intel_dp
->compliance
.test_lane_count
;
1687 DRM_DEBUG_KMS("DP link computation with max lane count %i "
1688 "max bw %d pixel clock %iKHz\n",
1689 max_lane_count
, intel_dp
->common_rates
[max_clock
],
1690 adjusted_mode
->crtc_clock
);
1692 /* Walk through all bpp values. Luckily they're all nicely spaced with 2
1693 * bpc in between. */
1694 bpp
= intel_dp_compute_bpp(intel_dp
, pipe_config
);
1695 if (is_edp(intel_dp
)) {
1697 /* Get bpp from vbt only for panels that dont have bpp in edid */
1698 if (intel_connector
->base
.display_info
.bpc
== 0 &&
1699 (dev_priv
->vbt
.edp
.bpp
&& dev_priv
->vbt
.edp
.bpp
< bpp
)) {
1700 DRM_DEBUG_KMS("clamping bpp for eDP panel to BIOS-provided %i\n",
1701 dev_priv
->vbt
.edp
.bpp
);
1702 bpp
= dev_priv
->vbt
.edp
.bpp
;
1706 * Use the maximum clock and number of lanes the eDP panel
1707 * advertizes being capable of. The panels are generally
1708 * designed to support only a single clock and lane
1709 * configuration, and typically these values correspond to the
1710 * native resolution of the panel.
1712 min_lane_count
= max_lane_count
;
1713 min_clock
= max_clock
;
1716 for (; bpp
>= 6*3; bpp
-= 2*3) {
1717 mode_rate
= intel_dp_link_required(adjusted_mode
->crtc_clock
,
1720 for (clock
= min_clock
; clock
<= max_clock
; clock
++) {
1721 for (lane_count
= min_lane_count
;
1722 lane_count
<= max_lane_count
;
1725 link_clock
= intel_dp
->common_rates
[clock
];
1726 link_avail
= intel_dp_max_data_rate(link_clock
,
1729 if (mode_rate
<= link_avail
) {
1739 if (intel_conn_state
->broadcast_rgb
== INTEL_BROADCAST_RGB_AUTO
) {
1742 * CEA-861-E - 5.1 Default Encoding Parameters
1743 * VESA DisplayPort Ver.1.2a - 5.1.1.1 Video Colorimetry
1745 pipe_config
->limited_color_range
=
1747 drm_default_rgb_quant_range(adjusted_mode
) ==
1748 HDMI_QUANTIZATION_RANGE_LIMITED
;
1750 pipe_config
->limited_color_range
=
1751 intel_conn_state
->broadcast_rgb
== INTEL_BROADCAST_RGB_LIMITED
;
1754 pipe_config
->lane_count
= lane_count
;
1756 pipe_config
->pipe_bpp
= bpp
;
1757 pipe_config
->port_clock
= intel_dp
->common_rates
[clock
];
1759 intel_dp_compute_rate(intel_dp
, pipe_config
->port_clock
,
1760 &link_bw
, &rate_select
);
1762 DRM_DEBUG_KMS("DP link bw %02x rate select %02x lane count %d clock %d bpp %d\n",
1763 link_bw
, rate_select
, pipe_config
->lane_count
,
1764 pipe_config
->port_clock
, bpp
);
1765 DRM_DEBUG_KMS("DP link bw required %i available %i\n",
1766 mode_rate
, link_avail
);
1768 intel_link_compute_m_n(bpp
, lane_count
,
1769 adjusted_mode
->crtc_clock
,
1770 pipe_config
->port_clock
,
1771 &pipe_config
->dp_m_n
,
1774 if (intel_connector
->panel
.downclock_mode
!= NULL
&&
1775 dev_priv
->drrs
.type
== SEAMLESS_DRRS_SUPPORT
) {
1776 pipe_config
->has_drrs
= true;
1777 intel_link_compute_m_n(bpp
, lane_count
,
1778 intel_connector
->panel
.downclock_mode
->clock
,
1779 pipe_config
->port_clock
,
1780 &pipe_config
->dp_m2_n2
,
1785 * DPLL0 VCO may need to be adjusted to get the correct
1786 * clock for eDP. This will affect cdclk as well.
1788 if (is_edp(intel_dp
) && IS_GEN9_BC(dev_priv
)) {
1791 switch (pipe_config
->port_clock
/ 2) {
1801 to_intel_atomic_state(pipe_config
->base
.state
)->cdclk
.logical
.vco
= vco
;
1804 if (!HAS_DDI(dev_priv
))
1805 intel_dp_set_clock(encoder
, pipe_config
);
1810 void intel_dp_set_link_params(struct intel_dp
*intel_dp
,
1811 int link_rate
, uint8_t lane_count
,
1814 intel_dp
->link_rate
= link_rate
;
1815 intel_dp
->lane_count
= lane_count
;
1816 intel_dp
->link_mst
= link_mst
;
1819 static void intel_dp_prepare(struct intel_encoder
*encoder
,
1820 struct intel_crtc_state
*pipe_config
)
1822 struct drm_device
*dev
= encoder
->base
.dev
;
1823 struct drm_i915_private
*dev_priv
= to_i915(dev
);
1824 struct intel_dp
*intel_dp
= enc_to_intel_dp(&encoder
->base
);
1825 enum port port
= dp_to_dig_port(intel_dp
)->port
;
1826 struct intel_crtc
*crtc
= to_intel_crtc(encoder
->base
.crtc
);
1827 const struct drm_display_mode
*adjusted_mode
= &pipe_config
->base
.adjusted_mode
;
1829 intel_dp_set_link_params(intel_dp
, pipe_config
->port_clock
,
1830 pipe_config
->lane_count
,
1831 intel_crtc_has_type(pipe_config
,
1832 INTEL_OUTPUT_DP_MST
));
1835 * There are four kinds of DP registers:
1842 * IBX PCH and CPU are the same for almost everything,
1843 * except that the CPU DP PLL is configured in this
1846 * CPT PCH is quite different, having many bits moved
1847 * to the TRANS_DP_CTL register instead. That
1848 * configuration happens (oddly) in ironlake_pch_enable
1851 /* Preserve the BIOS-computed detected bit. This is
1852 * supposed to be read-only.
1854 intel_dp
->DP
= I915_READ(intel_dp
->output_reg
) & DP_DETECTED
;
1856 /* Handle DP bits in common between all three register formats */
1857 intel_dp
->DP
|= DP_VOLTAGE_0_4
| DP_PRE_EMPHASIS_0
;
1858 intel_dp
->DP
|= DP_PORT_WIDTH(pipe_config
->lane_count
);
1860 /* Split out the IBX/CPU vs CPT settings */
1862 if (IS_GEN7(dev_priv
) && port
== PORT_A
) {
1863 if (adjusted_mode
->flags
& DRM_MODE_FLAG_PHSYNC
)
1864 intel_dp
->DP
|= DP_SYNC_HS_HIGH
;
1865 if (adjusted_mode
->flags
& DRM_MODE_FLAG_PVSYNC
)
1866 intel_dp
->DP
|= DP_SYNC_VS_HIGH
;
1867 intel_dp
->DP
|= DP_LINK_TRAIN_OFF_CPT
;
1869 if (drm_dp_enhanced_frame_cap(intel_dp
->dpcd
))
1870 intel_dp
->DP
|= DP_ENHANCED_FRAMING
;
1872 intel_dp
->DP
|= crtc
->pipe
<< 29;
1873 } else if (HAS_PCH_CPT(dev_priv
) && port
!= PORT_A
) {
1876 intel_dp
->DP
|= DP_LINK_TRAIN_OFF_CPT
;
1878 trans_dp
= I915_READ(TRANS_DP_CTL(crtc
->pipe
));
1879 if (drm_dp_enhanced_frame_cap(intel_dp
->dpcd
))
1880 trans_dp
|= TRANS_DP_ENH_FRAMING
;
1882 trans_dp
&= ~TRANS_DP_ENH_FRAMING
;
1883 I915_WRITE(TRANS_DP_CTL(crtc
->pipe
), trans_dp
);
1885 if (IS_G4X(dev_priv
) && pipe_config
->limited_color_range
)
1886 intel_dp
->DP
|= DP_COLOR_RANGE_16_235
;
1888 if (adjusted_mode
->flags
& DRM_MODE_FLAG_PHSYNC
)
1889 intel_dp
->DP
|= DP_SYNC_HS_HIGH
;
1890 if (adjusted_mode
->flags
& DRM_MODE_FLAG_PVSYNC
)
1891 intel_dp
->DP
|= DP_SYNC_VS_HIGH
;
1892 intel_dp
->DP
|= DP_LINK_TRAIN_OFF
;
1894 if (drm_dp_enhanced_frame_cap(intel_dp
->dpcd
))
1895 intel_dp
->DP
|= DP_ENHANCED_FRAMING
;
1897 if (IS_CHERRYVIEW(dev_priv
))
1898 intel_dp
->DP
|= DP_PIPE_SELECT_CHV(crtc
->pipe
);
1899 else if (crtc
->pipe
== PIPE_B
)
1900 intel_dp
->DP
|= DP_PIPEB_SELECT
;
1904 #define IDLE_ON_MASK (PP_ON | PP_SEQUENCE_MASK | 0 | PP_SEQUENCE_STATE_MASK)
1905 #define IDLE_ON_VALUE (PP_ON | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_ON_IDLE)
1907 #define IDLE_OFF_MASK (PP_ON | PP_SEQUENCE_MASK | 0 | 0)
1908 #define IDLE_OFF_VALUE (0 | PP_SEQUENCE_NONE | 0 | 0)
1910 #define IDLE_CYCLE_MASK (PP_ON | PP_SEQUENCE_MASK | PP_CYCLE_DELAY_ACTIVE | PP_SEQUENCE_STATE_MASK)
1911 #define IDLE_CYCLE_VALUE (0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_OFF_IDLE)
1913 static void intel_pps_verify_state(struct drm_i915_private
*dev_priv
,
1914 struct intel_dp
*intel_dp
);
1916 static void wait_panel_status(struct intel_dp
*intel_dp
,
1920 struct drm_device
*dev
= intel_dp_to_dev(intel_dp
);
1921 struct drm_i915_private
*dev_priv
= to_i915(dev
);
1922 i915_reg_t pp_stat_reg
, pp_ctrl_reg
;
1924 lockdep_assert_held(&dev_priv
->pps_mutex
);
1926 intel_pps_verify_state(dev_priv
, intel_dp
);
1928 pp_stat_reg
= _pp_stat_reg(intel_dp
);
1929 pp_ctrl_reg
= _pp_ctrl_reg(intel_dp
);
1931 DRM_DEBUG_KMS("mask %08x value %08x status %08x control %08x\n",
1933 I915_READ(pp_stat_reg
),
1934 I915_READ(pp_ctrl_reg
));
1936 if (intel_wait_for_register(dev_priv
,
1937 pp_stat_reg
, mask
, value
,
1939 DRM_ERROR("Panel status timeout: status %08x control %08x\n",
1940 I915_READ(pp_stat_reg
),
1941 I915_READ(pp_ctrl_reg
));
1943 DRM_DEBUG_KMS("Wait complete\n");
1946 static void wait_panel_on(struct intel_dp
*intel_dp
)
1948 DRM_DEBUG_KMS("Wait for panel power on\n");
1949 wait_panel_status(intel_dp
, IDLE_ON_MASK
, IDLE_ON_VALUE
);
1952 static void wait_panel_off(struct intel_dp
*intel_dp
)
1954 DRM_DEBUG_KMS("Wait for panel power off time\n");
1955 wait_panel_status(intel_dp
, IDLE_OFF_MASK
, IDLE_OFF_VALUE
);
1958 static void wait_panel_power_cycle(struct intel_dp
*intel_dp
)
1960 ktime_t panel_power_on_time
;
1961 s64 panel_power_off_duration
;
1963 DRM_DEBUG_KMS("Wait for panel power cycle\n");
1965 /* take the difference of currrent time and panel power off time
1966 * and then make panel wait for t11_t12 if needed. */
1967 panel_power_on_time
= ktime_get_boottime();
1968 panel_power_off_duration
= ktime_ms_delta(panel_power_on_time
, intel_dp
->panel_power_off_time
);
1970 /* When we disable the VDD override bit last we have to do the manual
1972 if (panel_power_off_duration
< (s64
)intel_dp
->panel_power_cycle_delay
)
1973 wait_remaining_ms_from_jiffies(jiffies
,
1974 intel_dp
->panel_power_cycle_delay
- panel_power_off_duration
);
1976 wait_panel_status(intel_dp
, IDLE_CYCLE_MASK
, IDLE_CYCLE_VALUE
);
1979 static void wait_backlight_on(struct intel_dp
*intel_dp
)
1981 wait_remaining_ms_from_jiffies(intel_dp
->last_power_on
,
1982 intel_dp
->backlight_on_delay
);
1985 static void edp_wait_backlight_off(struct intel_dp
*intel_dp
)
1987 wait_remaining_ms_from_jiffies(intel_dp
->last_backlight_off
,
1988 intel_dp
->backlight_off_delay
);
1991 /* Read the current pp_control value, unlocking the register if it
1995 static u32
ironlake_get_pp_control(struct intel_dp
*intel_dp
)
1997 struct drm_device
*dev
= intel_dp_to_dev(intel_dp
);
1998 struct drm_i915_private
*dev_priv
= to_i915(dev
);
2001 lockdep_assert_held(&dev_priv
->pps_mutex
);
2003 control
= I915_READ(_pp_ctrl_reg(intel_dp
));
2004 if (WARN_ON(!HAS_DDI(dev_priv
) &&
2005 (control
& PANEL_UNLOCK_MASK
) != PANEL_UNLOCK_REGS
)) {
2006 control
&= ~PANEL_UNLOCK_MASK
;
2007 control
|= PANEL_UNLOCK_REGS
;
2013 * Must be paired with edp_panel_vdd_off().
2014 * Must hold pps_mutex around the whole on/off sequence.
2015 * Can be nested with intel_edp_panel_vdd_{on,off}() calls.
2017 static bool edp_panel_vdd_on(struct intel_dp
*intel_dp
)
2019 struct drm_device
*dev
= intel_dp_to_dev(intel_dp
);
2020 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
2021 struct drm_i915_private
*dev_priv
= to_i915(dev
);
2023 i915_reg_t pp_stat_reg
, pp_ctrl_reg
;
2024 bool need_to_disable
= !intel_dp
->want_panel_vdd
;
2026 lockdep_assert_held(&dev_priv
->pps_mutex
);
2028 if (!is_edp(intel_dp
))
2031 cancel_delayed_work(&intel_dp
->panel_vdd_work
);
2032 intel_dp
->want_panel_vdd
= true;
2034 if (edp_have_panel_vdd(intel_dp
))
2035 return need_to_disable
;
2037 intel_display_power_get(dev_priv
, intel_dp
->aux_power_domain
);
2039 DRM_DEBUG_KMS("Turning eDP port %c VDD on\n",
2040 port_name(intel_dig_port
->port
));
2042 if (!edp_have_panel_power(intel_dp
))
2043 wait_panel_power_cycle(intel_dp
);
2045 pp
= ironlake_get_pp_control(intel_dp
);
2046 pp
|= EDP_FORCE_VDD
;
2048 pp_stat_reg
= _pp_stat_reg(intel_dp
);
2049 pp_ctrl_reg
= _pp_ctrl_reg(intel_dp
);
2051 I915_WRITE(pp_ctrl_reg
, pp
);
2052 POSTING_READ(pp_ctrl_reg
);
2053 DRM_DEBUG_KMS("PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
2054 I915_READ(pp_stat_reg
), I915_READ(pp_ctrl_reg
));
2056 * If the panel wasn't on, delay before accessing aux channel
2058 if (!edp_have_panel_power(intel_dp
)) {
2059 DRM_DEBUG_KMS("eDP port %c panel power wasn't enabled\n",
2060 port_name(intel_dig_port
->port
));
2061 msleep(intel_dp
->panel_power_up_delay
);
2064 return need_to_disable
;
2068 * Must be paired with intel_edp_panel_vdd_off() or
2069 * intel_edp_panel_off().
2070 * Nested calls to these functions are not allowed since
2071 * we drop the lock. Caller must use some higher level
2072 * locking to prevent nested calls from other threads.
2074 void intel_edp_panel_vdd_on(struct intel_dp
*intel_dp
)
2078 if (!is_edp(intel_dp
))
2082 vdd
= edp_panel_vdd_on(intel_dp
);
2083 pps_unlock(intel_dp
);
2085 I915_STATE_WARN(!vdd
, "eDP port %c VDD already requested on\n",
2086 port_name(dp_to_dig_port(intel_dp
)->port
));
2089 static void edp_panel_vdd_off_sync(struct intel_dp
*intel_dp
)
2091 struct drm_device
*dev
= intel_dp_to_dev(intel_dp
);
2092 struct drm_i915_private
*dev_priv
= to_i915(dev
);
2093 struct intel_digital_port
*intel_dig_port
=
2094 dp_to_dig_port(intel_dp
);
2096 i915_reg_t pp_stat_reg
, pp_ctrl_reg
;
2098 lockdep_assert_held(&dev_priv
->pps_mutex
);
2100 WARN_ON(intel_dp
->want_panel_vdd
);
2102 if (!edp_have_panel_vdd(intel_dp
))
2105 DRM_DEBUG_KMS("Turning eDP port %c VDD off\n",
2106 port_name(intel_dig_port
->port
));
2108 pp
= ironlake_get_pp_control(intel_dp
);
2109 pp
&= ~EDP_FORCE_VDD
;
2111 pp_ctrl_reg
= _pp_ctrl_reg(intel_dp
);
2112 pp_stat_reg
= _pp_stat_reg(intel_dp
);
2114 I915_WRITE(pp_ctrl_reg
, pp
);
2115 POSTING_READ(pp_ctrl_reg
);
2117 /* Make sure sequencer is idle before allowing subsequent activity */
2118 DRM_DEBUG_KMS("PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
2119 I915_READ(pp_stat_reg
), I915_READ(pp_ctrl_reg
));
2121 if ((pp
& PANEL_POWER_ON
) == 0)
2122 intel_dp
->panel_power_off_time
= ktime_get_boottime();
2124 intel_display_power_put(dev_priv
, intel_dp
->aux_power_domain
);
2127 static void edp_panel_vdd_work(struct work_struct
*__work
)
2129 struct intel_dp
*intel_dp
= container_of(to_delayed_work(__work
),
2130 struct intel_dp
, panel_vdd_work
);
2133 if (!intel_dp
->want_panel_vdd
)
2134 edp_panel_vdd_off_sync(intel_dp
);
2135 pps_unlock(intel_dp
);
2138 static void edp_panel_vdd_schedule_off(struct intel_dp
*intel_dp
)
2140 unsigned long delay
;
2143 * Queue the timer to fire a long time from now (relative to the power
2144 * down delay) to keep the panel power up across a sequence of
2147 delay
= msecs_to_jiffies(intel_dp
->panel_power_cycle_delay
* 5);
2148 schedule_delayed_work(&intel_dp
->panel_vdd_work
, delay
);
2152 * Must be paired with edp_panel_vdd_on().
2153 * Must hold pps_mutex around the whole on/off sequence.
2154 * Can be nested with intel_edp_panel_vdd_{on,off}() calls.
2156 static void edp_panel_vdd_off(struct intel_dp
*intel_dp
, bool sync
)
2158 struct drm_i915_private
*dev_priv
= to_i915(intel_dp_to_dev(intel_dp
));
2160 lockdep_assert_held(&dev_priv
->pps_mutex
);
2162 if (!is_edp(intel_dp
))
2165 I915_STATE_WARN(!intel_dp
->want_panel_vdd
, "eDP port %c VDD not forced on",
2166 port_name(dp_to_dig_port(intel_dp
)->port
));
2168 intel_dp
->want_panel_vdd
= false;
2171 edp_panel_vdd_off_sync(intel_dp
);
2173 edp_panel_vdd_schedule_off(intel_dp
);
2176 static void edp_panel_on(struct intel_dp
*intel_dp
)
2178 struct drm_device
*dev
= intel_dp_to_dev(intel_dp
);
2179 struct drm_i915_private
*dev_priv
= to_i915(dev
);
2181 i915_reg_t pp_ctrl_reg
;
2183 lockdep_assert_held(&dev_priv
->pps_mutex
);
2185 if (!is_edp(intel_dp
))
2188 DRM_DEBUG_KMS("Turn eDP port %c panel power on\n",
2189 port_name(dp_to_dig_port(intel_dp
)->port
));
2191 if (WARN(edp_have_panel_power(intel_dp
),
2192 "eDP port %c panel power already on\n",
2193 port_name(dp_to_dig_port(intel_dp
)->port
)))
2196 wait_panel_power_cycle(intel_dp
);
2198 pp_ctrl_reg
= _pp_ctrl_reg(intel_dp
);
2199 pp
= ironlake_get_pp_control(intel_dp
);
2200 if (IS_GEN5(dev_priv
)) {
2201 /* ILK workaround: disable reset around power sequence */
2202 pp
&= ~PANEL_POWER_RESET
;
2203 I915_WRITE(pp_ctrl_reg
, pp
);
2204 POSTING_READ(pp_ctrl_reg
);
2207 pp
|= PANEL_POWER_ON
;
2208 if (!IS_GEN5(dev_priv
))
2209 pp
|= PANEL_POWER_RESET
;
2211 I915_WRITE(pp_ctrl_reg
, pp
);
2212 POSTING_READ(pp_ctrl_reg
);
2214 wait_panel_on(intel_dp
);
2215 intel_dp
->last_power_on
= jiffies
;
2217 if (IS_GEN5(dev_priv
)) {
2218 pp
|= PANEL_POWER_RESET
; /* restore panel reset bit */
2219 I915_WRITE(pp_ctrl_reg
, pp
);
2220 POSTING_READ(pp_ctrl_reg
);
2224 void intel_edp_panel_on(struct intel_dp
*intel_dp
)
2226 if (!is_edp(intel_dp
))
2230 edp_panel_on(intel_dp
);
2231 pps_unlock(intel_dp
);
2235 static void edp_panel_off(struct intel_dp
*intel_dp
)
2237 struct drm_device
*dev
= intel_dp_to_dev(intel_dp
);
2238 struct drm_i915_private
*dev_priv
= to_i915(dev
);
2240 i915_reg_t pp_ctrl_reg
;
2242 lockdep_assert_held(&dev_priv
->pps_mutex
);
2244 if (!is_edp(intel_dp
))
2247 DRM_DEBUG_KMS("Turn eDP port %c panel power off\n",
2248 port_name(dp_to_dig_port(intel_dp
)->port
));
2250 WARN(!intel_dp
->want_panel_vdd
, "Need eDP port %c VDD to turn off panel\n",
2251 port_name(dp_to_dig_port(intel_dp
)->port
));
2253 pp
= ironlake_get_pp_control(intel_dp
);
2254 /* We need to switch off panel power _and_ force vdd, for otherwise some
2255 * panels get very unhappy and cease to work. */
2256 pp
&= ~(PANEL_POWER_ON
| PANEL_POWER_RESET
| EDP_FORCE_VDD
|
2259 pp_ctrl_reg
= _pp_ctrl_reg(intel_dp
);
2261 intel_dp
->want_panel_vdd
= false;
2263 I915_WRITE(pp_ctrl_reg
, pp
);
2264 POSTING_READ(pp_ctrl_reg
);
2266 intel_dp
->panel_power_off_time
= ktime_get_boottime();
2267 wait_panel_off(intel_dp
);
2269 /* We got a reference when we enabled the VDD. */
2270 intel_display_power_put(dev_priv
, intel_dp
->aux_power_domain
);
2273 void intel_edp_panel_off(struct intel_dp
*intel_dp
)
2275 if (!is_edp(intel_dp
))
2279 edp_panel_off(intel_dp
);
2280 pps_unlock(intel_dp
);
2283 /* Enable backlight in the panel power control. */
2284 static void _intel_edp_backlight_on(struct intel_dp
*intel_dp
)
2286 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
2287 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
2288 struct drm_i915_private
*dev_priv
= to_i915(dev
);
2290 i915_reg_t pp_ctrl_reg
;
2293 * If we enable the backlight right away following a panel power
2294 * on, we may see slight flicker as the panel syncs with the eDP
2295 * link. So delay a bit to make sure the image is solid before
2296 * allowing it to appear.
2298 wait_backlight_on(intel_dp
);
2302 pp
= ironlake_get_pp_control(intel_dp
);
2303 pp
|= EDP_BLC_ENABLE
;
2305 pp_ctrl_reg
= _pp_ctrl_reg(intel_dp
);
2307 I915_WRITE(pp_ctrl_reg
, pp
);
2308 POSTING_READ(pp_ctrl_reg
);
2310 pps_unlock(intel_dp
);
2313 /* Enable backlight PWM and backlight PP control. */
2314 void intel_edp_backlight_on(const struct intel_crtc_state
*crtc_state
,
2315 const struct drm_connector_state
*conn_state
)
2317 struct intel_dp
*intel_dp
= enc_to_intel_dp(conn_state
->best_encoder
);
2319 if (!is_edp(intel_dp
))
2322 DRM_DEBUG_KMS("\n");
2324 intel_panel_enable_backlight(crtc_state
, conn_state
);
2325 _intel_edp_backlight_on(intel_dp
);
2328 /* Disable backlight in the panel power control. */
2329 static void _intel_edp_backlight_off(struct intel_dp
*intel_dp
)
2331 struct drm_device
*dev
= intel_dp_to_dev(intel_dp
);
2332 struct drm_i915_private
*dev_priv
= to_i915(dev
);
2334 i915_reg_t pp_ctrl_reg
;
2336 if (!is_edp(intel_dp
))
2341 pp
= ironlake_get_pp_control(intel_dp
);
2342 pp
&= ~EDP_BLC_ENABLE
;
2344 pp_ctrl_reg
= _pp_ctrl_reg(intel_dp
);
2346 I915_WRITE(pp_ctrl_reg
, pp
);
2347 POSTING_READ(pp_ctrl_reg
);
2349 pps_unlock(intel_dp
);
2351 intel_dp
->last_backlight_off
= jiffies
;
2352 edp_wait_backlight_off(intel_dp
);
2355 /* Disable backlight PP control and backlight PWM. */
2356 void intel_edp_backlight_off(const struct drm_connector_state
*old_conn_state
)
2358 struct intel_dp
*intel_dp
= enc_to_intel_dp(old_conn_state
->best_encoder
);
2360 if (!is_edp(intel_dp
))
2363 DRM_DEBUG_KMS("\n");
2365 _intel_edp_backlight_off(intel_dp
);
2366 intel_panel_disable_backlight(old_conn_state
);
2370 * Hook for controlling the panel power control backlight through the bl_power
2371 * sysfs attribute. Take care to handle multiple calls.
2373 static void intel_edp_backlight_power(struct intel_connector
*connector
,
2376 struct intel_dp
*intel_dp
= intel_attached_dp(&connector
->base
);
2380 is_enabled
= ironlake_get_pp_control(intel_dp
) & EDP_BLC_ENABLE
;
2381 pps_unlock(intel_dp
);
2383 if (is_enabled
== enable
)
2386 DRM_DEBUG_KMS("panel power control backlight %s\n",
2387 enable
? "enable" : "disable");
2390 _intel_edp_backlight_on(intel_dp
);
2392 _intel_edp_backlight_off(intel_dp
);
2395 static void assert_dp_port(struct intel_dp
*intel_dp
, bool state
)
2397 struct intel_digital_port
*dig_port
= dp_to_dig_port(intel_dp
);
2398 struct drm_i915_private
*dev_priv
= to_i915(dig_port
->base
.base
.dev
);
2399 bool cur_state
= I915_READ(intel_dp
->output_reg
) & DP_PORT_EN
;
2401 I915_STATE_WARN(cur_state
!= state
,
2402 "DP port %c state assertion failure (expected %s, current %s)\n",
2403 port_name(dig_port
->port
),
2404 onoff(state
), onoff(cur_state
));
2406 #define assert_dp_port_disabled(d) assert_dp_port((d), false)
2408 static void assert_edp_pll(struct drm_i915_private
*dev_priv
, bool state
)
2410 bool cur_state
= I915_READ(DP_A
) & DP_PLL_ENABLE
;
2412 I915_STATE_WARN(cur_state
!= state
,
2413 "eDP PLL state assertion failure (expected %s, current %s)\n",
2414 onoff(state
), onoff(cur_state
));
2416 #define assert_edp_pll_enabled(d) assert_edp_pll((d), true)
2417 #define assert_edp_pll_disabled(d) assert_edp_pll((d), false)
2419 static void ironlake_edp_pll_on(struct intel_dp
*intel_dp
,
2420 struct intel_crtc_state
*pipe_config
)
2422 struct intel_crtc
*crtc
= to_intel_crtc(pipe_config
->base
.crtc
);
2423 struct drm_i915_private
*dev_priv
= to_i915(crtc
->base
.dev
);
2425 assert_pipe_disabled(dev_priv
, crtc
->pipe
);
2426 assert_dp_port_disabled(intel_dp
);
2427 assert_edp_pll_disabled(dev_priv
);
2429 DRM_DEBUG_KMS("enabling eDP PLL for clock %d\n",
2430 pipe_config
->port_clock
);
2432 intel_dp
->DP
&= ~DP_PLL_FREQ_MASK
;
2434 if (pipe_config
->port_clock
== 162000)
2435 intel_dp
->DP
|= DP_PLL_FREQ_162MHZ
;
2437 intel_dp
->DP
|= DP_PLL_FREQ_270MHZ
;
2439 I915_WRITE(DP_A
, intel_dp
->DP
);
2444 * [DevILK] Work around required when enabling DP PLL
2445 * while a pipe is enabled going to FDI:
2446 * 1. Wait for the start of vertical blank on the enabled pipe going to FDI
2447 * 2. Program DP PLL enable
2449 if (IS_GEN5(dev_priv
))
2450 intel_wait_for_vblank_if_active(dev_priv
, !crtc
->pipe
);
2452 intel_dp
->DP
|= DP_PLL_ENABLE
;
2454 I915_WRITE(DP_A
, intel_dp
->DP
);
2459 static void ironlake_edp_pll_off(struct intel_dp
*intel_dp
)
2461 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
2462 struct intel_crtc
*crtc
= to_intel_crtc(intel_dig_port
->base
.base
.crtc
);
2463 struct drm_i915_private
*dev_priv
= to_i915(crtc
->base
.dev
);
2465 assert_pipe_disabled(dev_priv
, crtc
->pipe
);
2466 assert_dp_port_disabled(intel_dp
);
2467 assert_edp_pll_enabled(dev_priv
);
2469 DRM_DEBUG_KMS("disabling eDP PLL\n");
2471 intel_dp
->DP
&= ~DP_PLL_ENABLE
;
2473 I915_WRITE(DP_A
, intel_dp
->DP
);
2478 /* If the sink supports it, try to set the power state appropriately */
2479 void intel_dp_sink_dpms(struct intel_dp
*intel_dp
, int mode
)
2483 /* Should have a valid DPCD by this point */
2484 if (intel_dp
->dpcd
[DP_DPCD_REV
] < 0x11)
2487 if (mode
!= DRM_MODE_DPMS_ON
) {
2488 ret
= drm_dp_dpcd_writeb(&intel_dp
->aux
, DP_SET_POWER
,
2491 struct intel_lspcon
*lspcon
= dp_to_lspcon(intel_dp
);
2494 * When turning on, we need to retry for 1ms to give the sink
2497 for (i
= 0; i
< 3; i
++) {
2498 ret
= drm_dp_dpcd_writeb(&intel_dp
->aux
, DP_SET_POWER
,
2505 if (ret
== 1 && lspcon
->active
)
2506 lspcon_wait_pcon_mode(lspcon
);
2510 DRM_DEBUG_KMS("failed to %s sink power state\n",
2511 mode
== DRM_MODE_DPMS_ON
? "enable" : "disable");
2514 static bool intel_dp_get_hw_state(struct intel_encoder
*encoder
,
2517 struct intel_dp
*intel_dp
= enc_to_intel_dp(&encoder
->base
);
2518 enum port port
= dp_to_dig_port(intel_dp
)->port
;
2519 struct drm_device
*dev
= encoder
->base
.dev
;
2520 struct drm_i915_private
*dev_priv
= to_i915(dev
);
2524 if (!intel_display_power_get_if_enabled(dev_priv
,
2525 encoder
->power_domain
))
2530 tmp
= I915_READ(intel_dp
->output_reg
);
2532 if (!(tmp
& DP_PORT_EN
))
2535 if (IS_GEN7(dev_priv
) && port
== PORT_A
) {
2536 *pipe
= PORT_TO_PIPE_CPT(tmp
);
2537 } else if (HAS_PCH_CPT(dev_priv
) && port
!= PORT_A
) {
2540 for_each_pipe(dev_priv
, p
) {
2541 u32 trans_dp
= I915_READ(TRANS_DP_CTL(p
));
2542 if (TRANS_DP_PIPE_TO_PORT(trans_dp
) == port
) {
2550 DRM_DEBUG_KMS("No pipe for dp port 0x%x found\n",
2551 i915_mmio_reg_offset(intel_dp
->output_reg
));
2552 } else if (IS_CHERRYVIEW(dev_priv
)) {
2553 *pipe
= DP_PORT_TO_PIPE_CHV(tmp
);
2555 *pipe
= PORT_TO_PIPE(tmp
);
2561 intel_display_power_put(dev_priv
, encoder
->power_domain
);
2566 static void intel_dp_get_config(struct intel_encoder
*encoder
,
2567 struct intel_crtc_state
*pipe_config
)
2569 struct intel_dp
*intel_dp
= enc_to_intel_dp(&encoder
->base
);
2571 struct drm_device
*dev
= encoder
->base
.dev
;
2572 struct drm_i915_private
*dev_priv
= to_i915(dev
);
2573 enum port port
= dp_to_dig_port(intel_dp
)->port
;
2574 struct intel_crtc
*crtc
= to_intel_crtc(encoder
->base
.crtc
);
2576 tmp
= I915_READ(intel_dp
->output_reg
);
2578 pipe_config
->has_audio
= tmp
& DP_AUDIO_OUTPUT_ENABLE
&& port
!= PORT_A
;
2580 if (HAS_PCH_CPT(dev_priv
) && port
!= PORT_A
) {
2581 u32 trans_dp
= I915_READ(TRANS_DP_CTL(crtc
->pipe
));
2583 if (trans_dp
& TRANS_DP_HSYNC_ACTIVE_HIGH
)
2584 flags
|= DRM_MODE_FLAG_PHSYNC
;
2586 flags
|= DRM_MODE_FLAG_NHSYNC
;
2588 if (trans_dp
& TRANS_DP_VSYNC_ACTIVE_HIGH
)
2589 flags
|= DRM_MODE_FLAG_PVSYNC
;
2591 flags
|= DRM_MODE_FLAG_NVSYNC
;
2593 if (tmp
& DP_SYNC_HS_HIGH
)
2594 flags
|= DRM_MODE_FLAG_PHSYNC
;
2596 flags
|= DRM_MODE_FLAG_NHSYNC
;
2598 if (tmp
& DP_SYNC_VS_HIGH
)
2599 flags
|= DRM_MODE_FLAG_PVSYNC
;
2601 flags
|= DRM_MODE_FLAG_NVSYNC
;
2604 pipe_config
->base
.adjusted_mode
.flags
|= flags
;
2606 if (IS_G4X(dev_priv
) && tmp
& DP_COLOR_RANGE_16_235
)
2607 pipe_config
->limited_color_range
= true;
2609 pipe_config
->lane_count
=
2610 ((tmp
& DP_PORT_WIDTH_MASK
) >> DP_PORT_WIDTH_SHIFT
) + 1;
2612 intel_dp_get_m_n(crtc
, pipe_config
);
2614 if (port
== PORT_A
) {
2615 if ((I915_READ(DP_A
) & DP_PLL_FREQ_MASK
) == DP_PLL_FREQ_162MHZ
)
2616 pipe_config
->port_clock
= 162000;
2618 pipe_config
->port_clock
= 270000;
2621 pipe_config
->base
.adjusted_mode
.crtc_clock
=
2622 intel_dotclock_calculate(pipe_config
->port_clock
,
2623 &pipe_config
->dp_m_n
);
2625 if (is_edp(intel_dp
) && dev_priv
->vbt
.edp
.bpp
&&
2626 pipe_config
->pipe_bpp
> dev_priv
->vbt
.edp
.bpp
) {
2628 * This is a big fat ugly hack.
2630 * Some machines in UEFI boot mode provide us a VBT that has 18
2631 * bpp and 1.62 GHz link bandwidth for eDP, which for reasons
2632 * unknown we fail to light up. Yet the same BIOS boots up with
2633 * 24 bpp and 2.7 GHz link. Use the same bpp as the BIOS uses as
2634 * max, not what it tells us to use.
2636 * Note: This will still be broken if the eDP panel is not lit
2637 * up by the BIOS, and thus we can't get the mode at module
2640 DRM_DEBUG_KMS("pipe has %d bpp for eDP panel, overriding BIOS-provided max %d bpp\n",
2641 pipe_config
->pipe_bpp
, dev_priv
->vbt
.edp
.bpp
);
2642 dev_priv
->vbt
.edp
.bpp
= pipe_config
->pipe_bpp
;
2646 static void intel_disable_dp(struct intel_encoder
*encoder
,
2647 struct intel_crtc_state
*old_crtc_state
,
2648 struct drm_connector_state
*old_conn_state
)
2650 struct intel_dp
*intel_dp
= enc_to_intel_dp(&encoder
->base
);
2651 struct drm_i915_private
*dev_priv
= to_i915(encoder
->base
.dev
);
2653 if (old_crtc_state
->has_audio
)
2654 intel_audio_codec_disable(encoder
);
2656 if (HAS_PSR(dev_priv
) && !HAS_DDI(dev_priv
))
2657 intel_psr_disable(intel_dp
);
2659 /* Make sure the panel is off before trying to change the mode. But also
2660 * ensure that we have vdd while we switch off the panel. */
2661 intel_edp_panel_vdd_on(intel_dp
);
2662 intel_edp_backlight_off(old_conn_state
);
2663 intel_dp_sink_dpms(intel_dp
, DRM_MODE_DPMS_OFF
);
2664 intel_edp_panel_off(intel_dp
);
2666 /* disable the port before the pipe on g4x */
2667 if (INTEL_GEN(dev_priv
) < 5)
2668 intel_dp_link_down(intel_dp
);
2671 static void ilk_post_disable_dp(struct intel_encoder
*encoder
,
2672 struct intel_crtc_state
*old_crtc_state
,
2673 struct drm_connector_state
*old_conn_state
)
2675 struct intel_dp
*intel_dp
= enc_to_intel_dp(&encoder
->base
);
2676 enum port port
= dp_to_dig_port(intel_dp
)->port
;
2678 intel_dp_link_down(intel_dp
);
2680 /* Only ilk+ has port A */
2682 ironlake_edp_pll_off(intel_dp
);
2685 static void vlv_post_disable_dp(struct intel_encoder
*encoder
,
2686 struct intel_crtc_state
*old_crtc_state
,
2687 struct drm_connector_state
*old_conn_state
)
2689 struct intel_dp
*intel_dp
= enc_to_intel_dp(&encoder
->base
);
2691 intel_dp_link_down(intel_dp
);
2694 static void chv_post_disable_dp(struct intel_encoder
*encoder
,
2695 struct intel_crtc_state
*old_crtc_state
,
2696 struct drm_connector_state
*old_conn_state
)
2698 struct intel_dp
*intel_dp
= enc_to_intel_dp(&encoder
->base
);
2699 struct drm_device
*dev
= encoder
->base
.dev
;
2700 struct drm_i915_private
*dev_priv
= to_i915(dev
);
2702 intel_dp_link_down(intel_dp
);
2704 mutex_lock(&dev_priv
->sb_lock
);
2706 /* Assert data lane reset */
2707 chv_data_lane_soft_reset(encoder
, true);
2709 mutex_unlock(&dev_priv
->sb_lock
);
2713 _intel_dp_set_link_train(struct intel_dp
*intel_dp
,
2715 uint8_t dp_train_pat
)
2717 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
2718 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
2719 struct drm_i915_private
*dev_priv
= to_i915(dev
);
2720 enum port port
= intel_dig_port
->port
;
2722 if (dp_train_pat
& DP_TRAINING_PATTERN_MASK
)
2723 DRM_DEBUG_KMS("Using DP training pattern TPS%d\n",
2724 dp_train_pat
& DP_TRAINING_PATTERN_MASK
);
2726 if (HAS_DDI(dev_priv
)) {
2727 uint32_t temp
= I915_READ(DP_TP_CTL(port
));
2729 if (dp_train_pat
& DP_LINK_SCRAMBLING_DISABLE
)
2730 temp
|= DP_TP_CTL_SCRAMBLE_DISABLE
;
2732 temp
&= ~DP_TP_CTL_SCRAMBLE_DISABLE
;
2734 temp
&= ~DP_TP_CTL_LINK_TRAIN_MASK
;
2735 switch (dp_train_pat
& DP_TRAINING_PATTERN_MASK
) {
2736 case DP_TRAINING_PATTERN_DISABLE
:
2737 temp
|= DP_TP_CTL_LINK_TRAIN_NORMAL
;
2740 case DP_TRAINING_PATTERN_1
:
2741 temp
|= DP_TP_CTL_LINK_TRAIN_PAT1
;
2743 case DP_TRAINING_PATTERN_2
:
2744 temp
|= DP_TP_CTL_LINK_TRAIN_PAT2
;
2746 case DP_TRAINING_PATTERN_3
:
2747 temp
|= DP_TP_CTL_LINK_TRAIN_PAT3
;
2750 I915_WRITE(DP_TP_CTL(port
), temp
);
2752 } else if ((IS_GEN7(dev_priv
) && port
== PORT_A
) ||
2753 (HAS_PCH_CPT(dev_priv
) && port
!= PORT_A
)) {
2754 *DP
&= ~DP_LINK_TRAIN_MASK_CPT
;
2756 switch (dp_train_pat
& DP_TRAINING_PATTERN_MASK
) {
2757 case DP_TRAINING_PATTERN_DISABLE
:
2758 *DP
|= DP_LINK_TRAIN_OFF_CPT
;
2760 case DP_TRAINING_PATTERN_1
:
2761 *DP
|= DP_LINK_TRAIN_PAT_1_CPT
;
2763 case DP_TRAINING_PATTERN_2
:
2764 *DP
|= DP_LINK_TRAIN_PAT_2_CPT
;
2766 case DP_TRAINING_PATTERN_3
:
2767 DRM_DEBUG_KMS("TPS3 not supported, using TPS2 instead\n");
2768 *DP
|= DP_LINK_TRAIN_PAT_2_CPT
;
2773 if (IS_CHERRYVIEW(dev_priv
))
2774 *DP
&= ~DP_LINK_TRAIN_MASK_CHV
;
2776 *DP
&= ~DP_LINK_TRAIN_MASK
;
2778 switch (dp_train_pat
& DP_TRAINING_PATTERN_MASK
) {
2779 case DP_TRAINING_PATTERN_DISABLE
:
2780 *DP
|= DP_LINK_TRAIN_OFF
;
2782 case DP_TRAINING_PATTERN_1
:
2783 *DP
|= DP_LINK_TRAIN_PAT_1
;
2785 case DP_TRAINING_PATTERN_2
:
2786 *DP
|= DP_LINK_TRAIN_PAT_2
;
2788 case DP_TRAINING_PATTERN_3
:
2789 if (IS_CHERRYVIEW(dev_priv
)) {
2790 *DP
|= DP_LINK_TRAIN_PAT_3_CHV
;
2792 DRM_DEBUG_KMS("TPS3 not supported, using TPS2 instead\n");
2793 *DP
|= DP_LINK_TRAIN_PAT_2
;
2800 static void intel_dp_enable_port(struct intel_dp
*intel_dp
,
2801 struct intel_crtc_state
*old_crtc_state
)
2803 struct drm_device
*dev
= intel_dp_to_dev(intel_dp
);
2804 struct drm_i915_private
*dev_priv
= to_i915(dev
);
2806 /* enable with pattern 1 (as per spec) */
2808 intel_dp_program_link_training_pattern(intel_dp
, DP_TRAINING_PATTERN_1
);
2811 * Magic for VLV/CHV. We _must_ first set up the register
2812 * without actually enabling the port, and then do another
2813 * write to enable the port. Otherwise link training will
2814 * fail when the power sequencer is freshly used for this port.
2816 intel_dp
->DP
|= DP_PORT_EN
;
2817 if (old_crtc_state
->has_audio
)
2818 intel_dp
->DP
|= DP_AUDIO_OUTPUT_ENABLE
;
2820 I915_WRITE(intel_dp
->output_reg
, intel_dp
->DP
);
2821 POSTING_READ(intel_dp
->output_reg
);
2824 static void intel_enable_dp(struct intel_encoder
*encoder
,
2825 struct intel_crtc_state
*pipe_config
,
2826 struct drm_connector_state
*conn_state
)
2828 struct intel_dp
*intel_dp
= enc_to_intel_dp(&encoder
->base
);
2829 struct drm_device
*dev
= encoder
->base
.dev
;
2830 struct drm_i915_private
*dev_priv
= to_i915(dev
);
2831 struct intel_crtc
*crtc
= to_intel_crtc(encoder
->base
.crtc
);
2832 uint32_t dp_reg
= I915_READ(intel_dp
->output_reg
);
2833 enum pipe pipe
= crtc
->pipe
;
2835 if (WARN_ON(dp_reg
& DP_PORT_EN
))
2840 if (IS_VALLEYVIEW(dev_priv
) || IS_CHERRYVIEW(dev_priv
))
2841 vlv_init_panel_power_sequencer(intel_dp
);
2843 intel_dp_enable_port(intel_dp
, pipe_config
);
2845 edp_panel_vdd_on(intel_dp
);
2846 edp_panel_on(intel_dp
);
2847 edp_panel_vdd_off(intel_dp
, true);
2849 pps_unlock(intel_dp
);
2851 if (IS_VALLEYVIEW(dev_priv
) || IS_CHERRYVIEW(dev_priv
)) {
2852 unsigned int lane_mask
= 0x0;
2854 if (IS_CHERRYVIEW(dev_priv
))
2855 lane_mask
= intel_dp_unused_lane_mask(pipe_config
->lane_count
);
2857 vlv_wait_port_ready(dev_priv
, dp_to_dig_port(intel_dp
),
2861 intel_dp_sink_dpms(intel_dp
, DRM_MODE_DPMS_ON
);
2862 intel_dp_start_link_train(intel_dp
);
2863 intel_dp_stop_link_train(intel_dp
);
2865 if (pipe_config
->has_audio
) {
2866 DRM_DEBUG_DRIVER("Enabling DP audio on pipe %c\n",
2868 intel_audio_codec_enable(encoder
, pipe_config
, conn_state
);
2872 static void g4x_enable_dp(struct intel_encoder
*encoder
,
2873 struct intel_crtc_state
*pipe_config
,
2874 struct drm_connector_state
*conn_state
)
2876 intel_enable_dp(encoder
, pipe_config
, conn_state
);
2877 intel_edp_backlight_on(pipe_config
, conn_state
);
2880 static void vlv_enable_dp(struct intel_encoder
*encoder
,
2881 struct intel_crtc_state
*pipe_config
,
2882 struct drm_connector_state
*conn_state
)
2884 struct intel_dp
*intel_dp
= enc_to_intel_dp(&encoder
->base
);
2886 intel_edp_backlight_on(pipe_config
, conn_state
);
2887 intel_psr_enable(intel_dp
);
2890 static void g4x_pre_enable_dp(struct intel_encoder
*encoder
,
2891 struct intel_crtc_state
*pipe_config
,
2892 struct drm_connector_state
*conn_state
)
2894 struct intel_dp
*intel_dp
= enc_to_intel_dp(&encoder
->base
);
2895 enum port port
= dp_to_dig_port(intel_dp
)->port
;
2897 intel_dp_prepare(encoder
, pipe_config
);
2899 /* Only ilk+ has port A */
2901 ironlake_edp_pll_on(intel_dp
, pipe_config
);
2904 static void vlv_detach_power_sequencer(struct intel_dp
*intel_dp
)
2906 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
2907 struct drm_i915_private
*dev_priv
= to_i915(intel_dig_port
->base
.base
.dev
);
2908 enum pipe pipe
= intel_dp
->pps_pipe
;
2909 i915_reg_t pp_on_reg
= PP_ON_DELAYS(pipe
);
2911 WARN_ON(intel_dp
->active_pipe
!= INVALID_PIPE
);
2913 if (WARN_ON(pipe
!= PIPE_A
&& pipe
!= PIPE_B
))
2916 edp_panel_vdd_off_sync(intel_dp
);
2919 * VLV seems to get confused when multiple power seqeuencers
2920 * have the same port selected (even if only one has power/vdd
2921 * enabled). The failure manifests as vlv_wait_port_ready() failing
2922 * CHV on the other hand doesn't seem to mind having the same port
2923 * selected in multiple power seqeuencers, but let's clear the
2924 * port select always when logically disconnecting a power sequencer
2927 DRM_DEBUG_KMS("detaching pipe %c power sequencer from port %c\n",
2928 pipe_name(pipe
), port_name(intel_dig_port
->port
));
2929 I915_WRITE(pp_on_reg
, 0);
2930 POSTING_READ(pp_on_reg
);
2932 intel_dp
->pps_pipe
= INVALID_PIPE
;
2935 static void vlv_steal_power_sequencer(struct drm_device
*dev
,
2938 struct drm_i915_private
*dev_priv
= to_i915(dev
);
2939 struct intel_encoder
*encoder
;
2941 lockdep_assert_held(&dev_priv
->pps_mutex
);
2943 for_each_intel_encoder(dev
, encoder
) {
2944 struct intel_dp
*intel_dp
;
2947 if (encoder
->type
!= INTEL_OUTPUT_DP
&&
2948 encoder
->type
!= INTEL_OUTPUT_EDP
)
2951 intel_dp
= enc_to_intel_dp(&encoder
->base
);
2952 port
= dp_to_dig_port(intel_dp
)->port
;
2954 WARN(intel_dp
->active_pipe
== pipe
,
2955 "stealing pipe %c power sequencer from active (e)DP port %c\n",
2956 pipe_name(pipe
), port_name(port
));
2958 if (intel_dp
->pps_pipe
!= pipe
)
2961 DRM_DEBUG_KMS("stealing pipe %c power sequencer from port %c\n",
2962 pipe_name(pipe
), port_name(port
));
2964 /* make sure vdd is off before we steal it */
2965 vlv_detach_power_sequencer(intel_dp
);
2969 static void vlv_init_panel_power_sequencer(struct intel_dp
*intel_dp
)
2971 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
2972 struct intel_encoder
*encoder
= &intel_dig_port
->base
;
2973 struct drm_device
*dev
= encoder
->base
.dev
;
2974 struct drm_i915_private
*dev_priv
= to_i915(dev
);
2975 struct intel_crtc
*crtc
= to_intel_crtc(encoder
->base
.crtc
);
2977 lockdep_assert_held(&dev_priv
->pps_mutex
);
2979 WARN_ON(intel_dp
->active_pipe
!= INVALID_PIPE
);
2981 if (intel_dp
->pps_pipe
!= INVALID_PIPE
&&
2982 intel_dp
->pps_pipe
!= crtc
->pipe
) {
2984 * If another power sequencer was being used on this
2985 * port previously make sure to turn off vdd there while
2986 * we still have control of it.
2988 vlv_detach_power_sequencer(intel_dp
);
2992 * We may be stealing the power
2993 * sequencer from another port.
2995 vlv_steal_power_sequencer(dev
, crtc
->pipe
);
2997 intel_dp
->active_pipe
= crtc
->pipe
;
2999 if (!is_edp(intel_dp
))
3002 /* now it's all ours */
3003 intel_dp
->pps_pipe
= crtc
->pipe
;
3005 DRM_DEBUG_KMS("initializing pipe %c power sequencer for port %c\n",
3006 pipe_name(intel_dp
->pps_pipe
), port_name(intel_dig_port
->port
));
3008 /* init power sequencer on this pipe and port */
3009 intel_dp_init_panel_power_sequencer(dev
, intel_dp
);
3010 intel_dp_init_panel_power_sequencer_registers(dev
, intel_dp
, true);
3013 static void vlv_pre_enable_dp(struct intel_encoder
*encoder
,
3014 struct intel_crtc_state
*pipe_config
,
3015 struct drm_connector_state
*conn_state
)
3017 vlv_phy_pre_encoder_enable(encoder
);
3019 intel_enable_dp(encoder
, pipe_config
, conn_state
);
3022 static void vlv_dp_pre_pll_enable(struct intel_encoder
*encoder
,
3023 struct intel_crtc_state
*pipe_config
,
3024 struct drm_connector_state
*conn_state
)
3026 intel_dp_prepare(encoder
, pipe_config
);
3028 vlv_phy_pre_pll_enable(encoder
);
3031 static void chv_pre_enable_dp(struct intel_encoder
*encoder
,
3032 struct intel_crtc_state
*pipe_config
,
3033 struct drm_connector_state
*conn_state
)
3035 chv_phy_pre_encoder_enable(encoder
);
3037 intel_enable_dp(encoder
, pipe_config
, conn_state
);
3039 /* Second common lane will stay alive on its own now */
3040 chv_phy_release_cl2_override(encoder
);
3043 static void chv_dp_pre_pll_enable(struct intel_encoder
*encoder
,
3044 struct intel_crtc_state
*pipe_config
,
3045 struct drm_connector_state
*conn_state
)
3047 intel_dp_prepare(encoder
, pipe_config
);
3049 chv_phy_pre_pll_enable(encoder
);
3052 static void chv_dp_post_pll_disable(struct intel_encoder
*encoder
,
3053 struct intel_crtc_state
*pipe_config
,
3054 struct drm_connector_state
*conn_state
)
3056 chv_phy_post_pll_disable(encoder
);
3060 * Fetch AUX CH registers 0x202 - 0x207 which contain
3061 * link status information
3064 intel_dp_get_link_status(struct intel_dp
*intel_dp
, uint8_t link_status
[DP_LINK_STATUS_SIZE
])
3066 return drm_dp_dpcd_read(&intel_dp
->aux
, DP_LANE0_1_STATUS
, link_status
,
3067 DP_LINK_STATUS_SIZE
) == DP_LINK_STATUS_SIZE
;
3070 static bool intel_dp_get_y_cord_status(struct intel_dp
*intel_dp
)
3072 uint8_t psr_caps
= 0;
3074 if (drm_dp_dpcd_readb(&intel_dp
->aux
, DP_PSR_CAPS
, &psr_caps
) != 1)
3076 return psr_caps
& DP_PSR2_SU_Y_COORDINATE_REQUIRED
;
3079 static bool intel_dp_get_colorimetry_status(struct intel_dp
*intel_dp
)
3083 if (drm_dp_dpcd_readb(&intel_dp
->aux
, DP_DPRX_FEATURE_ENUMERATION_LIST
,
3086 return dprx
& DP_VSC_SDP_EXT_FOR_COLORIMETRY_SUPPORTED
;
3089 static bool intel_dp_get_alpm_status(struct intel_dp
*intel_dp
)
3091 uint8_t alpm_caps
= 0;
3093 if (drm_dp_dpcd_readb(&intel_dp
->aux
, DP_RECEIVER_ALPM_CAP
,
3096 return alpm_caps
& DP_ALPM_CAP
;
3099 /* These are source-specific values. */
3101 intel_dp_voltage_max(struct intel_dp
*intel_dp
)
3103 struct drm_i915_private
*dev_priv
= to_i915(intel_dp_to_dev(intel_dp
));
3104 enum port port
= dp_to_dig_port(intel_dp
)->port
;
3106 if (IS_GEN9_LP(dev_priv
))
3107 return DP_TRAIN_VOLTAGE_SWING_LEVEL_3
;
3108 else if (INTEL_GEN(dev_priv
) >= 9) {
3109 struct intel_encoder
*encoder
= &dp_to_dig_port(intel_dp
)->base
;
3110 return intel_ddi_dp_voltage_max(encoder
);
3111 } else if (IS_VALLEYVIEW(dev_priv
) || IS_CHERRYVIEW(dev_priv
))
3112 return DP_TRAIN_VOLTAGE_SWING_LEVEL_3
;
3113 else if (IS_GEN7(dev_priv
) && port
== PORT_A
)
3114 return DP_TRAIN_VOLTAGE_SWING_LEVEL_2
;
3115 else if (HAS_PCH_CPT(dev_priv
) && port
!= PORT_A
)
3116 return DP_TRAIN_VOLTAGE_SWING_LEVEL_3
;
3118 return DP_TRAIN_VOLTAGE_SWING_LEVEL_2
;
3122 intel_dp_pre_emphasis_max(struct intel_dp
*intel_dp
, uint8_t voltage_swing
)
3124 struct drm_i915_private
*dev_priv
= to_i915(intel_dp_to_dev(intel_dp
));
3125 enum port port
= dp_to_dig_port(intel_dp
)->port
;
3127 if (INTEL_GEN(dev_priv
) >= 9) {
3128 switch (voltage_swing
& DP_TRAIN_VOLTAGE_SWING_MASK
) {
3129 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0
:
3130 return DP_TRAIN_PRE_EMPH_LEVEL_3
;
3131 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1
:
3132 return DP_TRAIN_PRE_EMPH_LEVEL_2
;
3133 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2
:
3134 return DP_TRAIN_PRE_EMPH_LEVEL_1
;
3135 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3
:
3136 return DP_TRAIN_PRE_EMPH_LEVEL_0
;
3138 return DP_TRAIN_PRE_EMPH_LEVEL_0
;
3140 } else if (IS_HASWELL(dev_priv
) || IS_BROADWELL(dev_priv
)) {
3141 switch (voltage_swing
& DP_TRAIN_VOLTAGE_SWING_MASK
) {
3142 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0
:
3143 return DP_TRAIN_PRE_EMPH_LEVEL_3
;
3144 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1
:
3145 return DP_TRAIN_PRE_EMPH_LEVEL_2
;
3146 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2
:
3147 return DP_TRAIN_PRE_EMPH_LEVEL_1
;
3148 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3
:
3150 return DP_TRAIN_PRE_EMPH_LEVEL_0
;
3152 } else if (IS_VALLEYVIEW(dev_priv
) || IS_CHERRYVIEW(dev_priv
)) {
3153 switch (voltage_swing
& DP_TRAIN_VOLTAGE_SWING_MASK
) {
3154 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0
:
3155 return DP_TRAIN_PRE_EMPH_LEVEL_3
;
3156 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1
:
3157 return DP_TRAIN_PRE_EMPH_LEVEL_2
;
3158 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2
:
3159 return DP_TRAIN_PRE_EMPH_LEVEL_1
;
3160 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3
:
3162 return DP_TRAIN_PRE_EMPH_LEVEL_0
;
3164 } else if (IS_GEN7(dev_priv
) && port
== PORT_A
) {
3165 switch (voltage_swing
& DP_TRAIN_VOLTAGE_SWING_MASK
) {
3166 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0
:
3167 return DP_TRAIN_PRE_EMPH_LEVEL_2
;
3168 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1
:
3169 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2
:
3170 return DP_TRAIN_PRE_EMPH_LEVEL_1
;
3172 return DP_TRAIN_PRE_EMPH_LEVEL_0
;
3175 switch (voltage_swing
& DP_TRAIN_VOLTAGE_SWING_MASK
) {
3176 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0
:
3177 return DP_TRAIN_PRE_EMPH_LEVEL_2
;
3178 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1
:
3179 return DP_TRAIN_PRE_EMPH_LEVEL_2
;
3180 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2
:
3181 return DP_TRAIN_PRE_EMPH_LEVEL_1
;
3182 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3
:
3184 return DP_TRAIN_PRE_EMPH_LEVEL_0
;
3189 static uint32_t vlv_signal_levels(struct intel_dp
*intel_dp
)
3191 struct intel_encoder
*encoder
= &dp_to_dig_port(intel_dp
)->base
;
3192 unsigned long demph_reg_value
, preemph_reg_value
,
3193 uniqtranscale_reg_value
;
3194 uint8_t train_set
= intel_dp
->train_set
[0];
3196 switch (train_set
& DP_TRAIN_PRE_EMPHASIS_MASK
) {
3197 case DP_TRAIN_PRE_EMPH_LEVEL_0
:
3198 preemph_reg_value
= 0x0004000;
3199 switch (train_set
& DP_TRAIN_VOLTAGE_SWING_MASK
) {
3200 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0
:
3201 demph_reg_value
= 0x2B405555;
3202 uniqtranscale_reg_value
= 0x552AB83A;
3204 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1
:
3205 demph_reg_value
= 0x2B404040;
3206 uniqtranscale_reg_value
= 0x5548B83A;
3208 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2
:
3209 demph_reg_value
= 0x2B245555;
3210 uniqtranscale_reg_value
= 0x5560B83A;
3212 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3
:
3213 demph_reg_value
= 0x2B405555;
3214 uniqtranscale_reg_value
= 0x5598DA3A;
3220 case DP_TRAIN_PRE_EMPH_LEVEL_1
:
3221 preemph_reg_value
= 0x0002000;
3222 switch (train_set
& DP_TRAIN_VOLTAGE_SWING_MASK
) {
3223 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0
:
3224 demph_reg_value
= 0x2B404040;
3225 uniqtranscale_reg_value
= 0x5552B83A;
3227 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1
:
3228 demph_reg_value
= 0x2B404848;
3229 uniqtranscale_reg_value
= 0x5580B83A;
3231 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2
:
3232 demph_reg_value
= 0x2B404040;
3233 uniqtranscale_reg_value
= 0x55ADDA3A;
3239 case DP_TRAIN_PRE_EMPH_LEVEL_2
:
3240 preemph_reg_value
= 0x0000000;
3241 switch (train_set
& DP_TRAIN_VOLTAGE_SWING_MASK
) {
3242 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0
:
3243 demph_reg_value
= 0x2B305555;
3244 uniqtranscale_reg_value
= 0x5570B83A;
3246 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1
:
3247 demph_reg_value
= 0x2B2B4040;
3248 uniqtranscale_reg_value
= 0x55ADDA3A;
3254 case DP_TRAIN_PRE_EMPH_LEVEL_3
:
3255 preemph_reg_value
= 0x0006000;
3256 switch (train_set
& DP_TRAIN_VOLTAGE_SWING_MASK
) {
3257 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0
:
3258 demph_reg_value
= 0x1B405555;
3259 uniqtranscale_reg_value
= 0x55ADDA3A;
3269 vlv_set_phy_signal_level(encoder
, demph_reg_value
, preemph_reg_value
,
3270 uniqtranscale_reg_value
, 0);
3275 static uint32_t chv_signal_levels(struct intel_dp
*intel_dp
)
3277 struct intel_encoder
*encoder
= &dp_to_dig_port(intel_dp
)->base
;
3278 u32 deemph_reg_value
, margin_reg_value
;
3279 bool uniq_trans_scale
= false;
3280 uint8_t train_set
= intel_dp
->train_set
[0];
3282 switch (train_set
& DP_TRAIN_PRE_EMPHASIS_MASK
) {
3283 case DP_TRAIN_PRE_EMPH_LEVEL_0
:
3284 switch (train_set
& DP_TRAIN_VOLTAGE_SWING_MASK
) {
3285 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0
:
3286 deemph_reg_value
= 128;
3287 margin_reg_value
= 52;
3289 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1
:
3290 deemph_reg_value
= 128;
3291 margin_reg_value
= 77;
3293 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2
:
3294 deemph_reg_value
= 128;
3295 margin_reg_value
= 102;
3297 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3
:
3298 deemph_reg_value
= 128;
3299 margin_reg_value
= 154;
3300 uniq_trans_scale
= true;
3306 case DP_TRAIN_PRE_EMPH_LEVEL_1
:
3307 switch (train_set
& DP_TRAIN_VOLTAGE_SWING_MASK
) {
3308 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0
:
3309 deemph_reg_value
= 85;
3310 margin_reg_value
= 78;
3312 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1
:
3313 deemph_reg_value
= 85;
3314 margin_reg_value
= 116;
3316 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2
:
3317 deemph_reg_value
= 85;
3318 margin_reg_value
= 154;
3324 case DP_TRAIN_PRE_EMPH_LEVEL_2
:
3325 switch (train_set
& DP_TRAIN_VOLTAGE_SWING_MASK
) {
3326 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0
:
3327 deemph_reg_value
= 64;
3328 margin_reg_value
= 104;
3330 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1
:
3331 deemph_reg_value
= 64;
3332 margin_reg_value
= 154;
3338 case DP_TRAIN_PRE_EMPH_LEVEL_3
:
3339 switch (train_set
& DP_TRAIN_VOLTAGE_SWING_MASK
) {
3340 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0
:
3341 deemph_reg_value
= 43;
3342 margin_reg_value
= 154;
3352 chv_set_phy_signal_level(encoder
, deemph_reg_value
,
3353 margin_reg_value
, uniq_trans_scale
);
3359 gen4_signal_levels(uint8_t train_set
)
3361 uint32_t signal_levels
= 0;
3363 switch (train_set
& DP_TRAIN_VOLTAGE_SWING_MASK
) {
3364 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0
:
3366 signal_levels
|= DP_VOLTAGE_0_4
;
3368 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1
:
3369 signal_levels
|= DP_VOLTAGE_0_6
;
3371 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2
:
3372 signal_levels
|= DP_VOLTAGE_0_8
;
3374 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3
:
3375 signal_levels
|= DP_VOLTAGE_1_2
;
3378 switch (train_set
& DP_TRAIN_PRE_EMPHASIS_MASK
) {
3379 case DP_TRAIN_PRE_EMPH_LEVEL_0
:
3381 signal_levels
|= DP_PRE_EMPHASIS_0
;
3383 case DP_TRAIN_PRE_EMPH_LEVEL_1
:
3384 signal_levels
|= DP_PRE_EMPHASIS_3_5
;
3386 case DP_TRAIN_PRE_EMPH_LEVEL_2
:
3387 signal_levels
|= DP_PRE_EMPHASIS_6
;
3389 case DP_TRAIN_PRE_EMPH_LEVEL_3
:
3390 signal_levels
|= DP_PRE_EMPHASIS_9_5
;
3393 return signal_levels
;
3396 /* Gen6's DP voltage swing and pre-emphasis control */
3398 gen6_edp_signal_levels(uint8_t train_set
)
3400 int signal_levels
= train_set
& (DP_TRAIN_VOLTAGE_SWING_MASK
|
3401 DP_TRAIN_PRE_EMPHASIS_MASK
);
3402 switch (signal_levels
) {
3403 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0
| DP_TRAIN_PRE_EMPH_LEVEL_0
:
3404 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1
| DP_TRAIN_PRE_EMPH_LEVEL_0
:
3405 return EDP_LINK_TRAIN_400_600MV_0DB_SNB_B
;
3406 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0
| DP_TRAIN_PRE_EMPH_LEVEL_1
:
3407 return EDP_LINK_TRAIN_400MV_3_5DB_SNB_B
;
3408 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0
| DP_TRAIN_PRE_EMPH_LEVEL_2
:
3409 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1
| DP_TRAIN_PRE_EMPH_LEVEL_2
:
3410 return EDP_LINK_TRAIN_400_600MV_6DB_SNB_B
;
3411 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1
| DP_TRAIN_PRE_EMPH_LEVEL_1
:
3412 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2
| DP_TRAIN_PRE_EMPH_LEVEL_1
:
3413 return EDP_LINK_TRAIN_600_800MV_3_5DB_SNB_B
;
3414 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2
| DP_TRAIN_PRE_EMPH_LEVEL_0
:
3415 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3
| DP_TRAIN_PRE_EMPH_LEVEL_0
:
3416 return EDP_LINK_TRAIN_800_1200MV_0DB_SNB_B
;
3418 DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:"
3419 "0x%x\n", signal_levels
);
3420 return EDP_LINK_TRAIN_400_600MV_0DB_SNB_B
;
3424 /* Gen7's DP voltage swing and pre-emphasis control */
3426 gen7_edp_signal_levels(uint8_t train_set
)
3428 int signal_levels
= train_set
& (DP_TRAIN_VOLTAGE_SWING_MASK
|
3429 DP_TRAIN_PRE_EMPHASIS_MASK
);
3430 switch (signal_levels
) {
3431 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0
| DP_TRAIN_PRE_EMPH_LEVEL_0
:
3432 return EDP_LINK_TRAIN_400MV_0DB_IVB
;
3433 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0
| DP_TRAIN_PRE_EMPH_LEVEL_1
:
3434 return EDP_LINK_TRAIN_400MV_3_5DB_IVB
;
3435 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0
| DP_TRAIN_PRE_EMPH_LEVEL_2
:
3436 return EDP_LINK_TRAIN_400MV_6DB_IVB
;
3438 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1
| DP_TRAIN_PRE_EMPH_LEVEL_0
:
3439 return EDP_LINK_TRAIN_600MV_0DB_IVB
;
3440 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1
| DP_TRAIN_PRE_EMPH_LEVEL_1
:
3441 return EDP_LINK_TRAIN_600MV_3_5DB_IVB
;
3443 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2
| DP_TRAIN_PRE_EMPH_LEVEL_0
:
3444 return EDP_LINK_TRAIN_800MV_0DB_IVB
;
3445 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2
| DP_TRAIN_PRE_EMPH_LEVEL_1
:
3446 return EDP_LINK_TRAIN_800MV_3_5DB_IVB
;
3449 DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:"
3450 "0x%x\n", signal_levels
);
3451 return EDP_LINK_TRAIN_500MV_0DB_IVB
;
3456 intel_dp_set_signal_levels(struct intel_dp
*intel_dp
)
3458 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
3459 enum port port
= intel_dig_port
->port
;
3460 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
3461 struct drm_i915_private
*dev_priv
= to_i915(dev
);
3462 uint32_t signal_levels
, mask
= 0;
3463 uint8_t train_set
= intel_dp
->train_set
[0];
3465 if (HAS_DDI(dev_priv
)) {
3466 signal_levels
= ddi_signal_levels(intel_dp
);
3468 if (IS_GEN9_LP(dev_priv
) || IS_CANNONLAKE(dev_priv
))
3471 mask
= DDI_BUF_EMP_MASK
;
3472 } else if (IS_CHERRYVIEW(dev_priv
)) {
3473 signal_levels
= chv_signal_levels(intel_dp
);
3474 } else if (IS_VALLEYVIEW(dev_priv
)) {
3475 signal_levels
= vlv_signal_levels(intel_dp
);
3476 } else if (IS_GEN7(dev_priv
) && port
== PORT_A
) {
3477 signal_levels
= gen7_edp_signal_levels(train_set
);
3478 mask
= EDP_LINK_TRAIN_VOL_EMP_MASK_IVB
;
3479 } else if (IS_GEN6(dev_priv
) && port
== PORT_A
) {
3480 signal_levels
= gen6_edp_signal_levels(train_set
);
3481 mask
= EDP_LINK_TRAIN_VOL_EMP_MASK_SNB
;
3483 signal_levels
= gen4_signal_levels(train_set
);
3484 mask
= DP_VOLTAGE_MASK
| DP_PRE_EMPHASIS_MASK
;
3488 DRM_DEBUG_KMS("Using signal levels %08x\n", signal_levels
);
3490 DRM_DEBUG_KMS("Using vswing level %d\n",
3491 train_set
& DP_TRAIN_VOLTAGE_SWING_MASK
);
3492 DRM_DEBUG_KMS("Using pre-emphasis level %d\n",
3493 (train_set
& DP_TRAIN_PRE_EMPHASIS_MASK
) >>
3494 DP_TRAIN_PRE_EMPHASIS_SHIFT
);
3496 intel_dp
->DP
= (intel_dp
->DP
& ~mask
) | signal_levels
;
3498 I915_WRITE(intel_dp
->output_reg
, intel_dp
->DP
);
3499 POSTING_READ(intel_dp
->output_reg
);
3503 intel_dp_program_link_training_pattern(struct intel_dp
*intel_dp
,
3504 uint8_t dp_train_pat
)
3506 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
3507 struct drm_i915_private
*dev_priv
=
3508 to_i915(intel_dig_port
->base
.base
.dev
);
3510 _intel_dp_set_link_train(intel_dp
, &intel_dp
->DP
, dp_train_pat
);
3512 I915_WRITE(intel_dp
->output_reg
, intel_dp
->DP
);
3513 POSTING_READ(intel_dp
->output_reg
);
3516 void intel_dp_set_idle_link_train(struct intel_dp
*intel_dp
)
3518 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
3519 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
3520 struct drm_i915_private
*dev_priv
= to_i915(dev
);
3521 enum port port
= intel_dig_port
->port
;
3524 if (!HAS_DDI(dev_priv
))
3527 val
= I915_READ(DP_TP_CTL(port
));
3528 val
&= ~DP_TP_CTL_LINK_TRAIN_MASK
;
3529 val
|= DP_TP_CTL_LINK_TRAIN_IDLE
;
3530 I915_WRITE(DP_TP_CTL(port
), val
);
3533 * On PORT_A we can have only eDP in SST mode. There the only reason
3534 * we need to set idle transmission mode is to work around a HW issue
3535 * where we enable the pipe while not in idle link-training mode.
3536 * In this case there is requirement to wait for a minimum number of
3537 * idle patterns to be sent.
3542 if (intel_wait_for_register(dev_priv
,DP_TP_STATUS(port
),
3543 DP_TP_STATUS_IDLE_DONE
,
3544 DP_TP_STATUS_IDLE_DONE
,
3546 DRM_ERROR("Timed out waiting for DP idle patterns\n");
3550 intel_dp_link_down(struct intel_dp
*intel_dp
)
3552 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
3553 struct intel_crtc
*crtc
= to_intel_crtc(intel_dig_port
->base
.base
.crtc
);
3554 enum port port
= intel_dig_port
->port
;
3555 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
3556 struct drm_i915_private
*dev_priv
= to_i915(dev
);
3557 uint32_t DP
= intel_dp
->DP
;
3559 if (WARN_ON(HAS_DDI(dev_priv
)))
3562 if (WARN_ON((I915_READ(intel_dp
->output_reg
) & DP_PORT_EN
) == 0))
3565 DRM_DEBUG_KMS("\n");
3567 if ((IS_GEN7(dev_priv
) && port
== PORT_A
) ||
3568 (HAS_PCH_CPT(dev_priv
) && port
!= PORT_A
)) {
3569 DP
&= ~DP_LINK_TRAIN_MASK_CPT
;
3570 DP
|= DP_LINK_TRAIN_PAT_IDLE_CPT
;
3572 if (IS_CHERRYVIEW(dev_priv
))
3573 DP
&= ~DP_LINK_TRAIN_MASK_CHV
;
3575 DP
&= ~DP_LINK_TRAIN_MASK
;
3576 DP
|= DP_LINK_TRAIN_PAT_IDLE
;
3578 I915_WRITE(intel_dp
->output_reg
, DP
);
3579 POSTING_READ(intel_dp
->output_reg
);
3581 DP
&= ~(DP_PORT_EN
| DP_AUDIO_OUTPUT_ENABLE
);
3582 I915_WRITE(intel_dp
->output_reg
, DP
);
3583 POSTING_READ(intel_dp
->output_reg
);
3586 * HW workaround for IBX, we need to move the port
3587 * to transcoder A after disabling it to allow the
3588 * matching HDMI port to be enabled on transcoder A.
3590 if (HAS_PCH_IBX(dev_priv
) && crtc
->pipe
== PIPE_B
&& port
!= PORT_A
) {
3592 * We get CPU/PCH FIFO underruns on the other pipe when
3593 * doing the workaround. Sweep them under the rug.
3595 intel_set_cpu_fifo_underrun_reporting(dev_priv
, PIPE_A
, false);
3596 intel_set_pch_fifo_underrun_reporting(dev_priv
, PIPE_A
, false);
3598 /* always enable with pattern 1 (as per spec) */
3599 DP
&= ~(DP_PIPEB_SELECT
| DP_LINK_TRAIN_MASK
);
3600 DP
|= DP_PORT_EN
| DP_LINK_TRAIN_PAT_1
;
3601 I915_WRITE(intel_dp
->output_reg
, DP
);
3602 POSTING_READ(intel_dp
->output_reg
);
3605 I915_WRITE(intel_dp
->output_reg
, DP
);
3606 POSTING_READ(intel_dp
->output_reg
);
3608 intel_wait_for_vblank_if_active(dev_priv
, PIPE_A
);
3609 intel_set_cpu_fifo_underrun_reporting(dev_priv
, PIPE_A
, true);
3610 intel_set_pch_fifo_underrun_reporting(dev_priv
, PIPE_A
, true);
3613 msleep(intel_dp
->panel_power_down_delay
);
3617 if (IS_VALLEYVIEW(dev_priv
) || IS_CHERRYVIEW(dev_priv
)) {
3619 intel_dp
->active_pipe
= INVALID_PIPE
;
3620 pps_unlock(intel_dp
);
3625 intel_dp_read_dpcd(struct intel_dp
*intel_dp
)
3627 if (drm_dp_dpcd_read(&intel_dp
->aux
, 0x000, intel_dp
->dpcd
,
3628 sizeof(intel_dp
->dpcd
)) < 0)
3629 return false; /* aux transfer failed */
3631 DRM_DEBUG_KMS("DPCD: %*ph\n", (int) sizeof(intel_dp
->dpcd
), intel_dp
->dpcd
);
3633 return intel_dp
->dpcd
[DP_DPCD_REV
] != 0;
3637 intel_edp_init_dpcd(struct intel_dp
*intel_dp
)
3639 struct drm_i915_private
*dev_priv
=
3640 to_i915(dp_to_dig_port(intel_dp
)->base
.base
.dev
);
3642 /* this function is meant to be called only once */
3643 WARN_ON(intel_dp
->dpcd
[DP_DPCD_REV
] != 0);
3645 if (!intel_dp_read_dpcd(intel_dp
))
3648 drm_dp_read_desc(&intel_dp
->aux
, &intel_dp
->desc
,
3649 drm_dp_is_branch(intel_dp
->dpcd
));
3651 if (intel_dp
->dpcd
[DP_DPCD_REV
] >= 0x11)
3652 dev_priv
->no_aux_handshake
= intel_dp
->dpcd
[DP_MAX_DOWNSPREAD
] &
3653 DP_NO_AUX_HANDSHAKE_LINK_TRAINING
;
3655 /* Check if the panel supports PSR */
3656 drm_dp_dpcd_read(&intel_dp
->aux
, DP_PSR_SUPPORT
,
3658 sizeof(intel_dp
->psr_dpcd
));
3659 if (intel_dp
->psr_dpcd
[0] & DP_PSR_IS_SUPPORTED
) {
3660 dev_priv
->psr
.sink_support
= true;
3661 DRM_DEBUG_KMS("Detected EDP PSR Panel.\n");
3664 if (INTEL_GEN(dev_priv
) >= 9 &&
3665 (intel_dp
->psr_dpcd
[0] & DP_PSR2_IS_SUPPORTED
)) {
3666 uint8_t frame_sync_cap
;
3668 dev_priv
->psr
.sink_support
= true;
3669 if (drm_dp_dpcd_readb(&intel_dp
->aux
,
3670 DP_SINK_DEVICE_AUX_FRAME_SYNC_CAP
,
3671 &frame_sync_cap
) != 1)
3673 dev_priv
->psr
.aux_frame_sync
= frame_sync_cap
? true : false;
3674 /* PSR2 needs frame sync as well */
3675 dev_priv
->psr
.psr2_support
= dev_priv
->psr
.aux_frame_sync
;
3676 DRM_DEBUG_KMS("PSR2 %s on sink",
3677 dev_priv
->psr
.psr2_support
? "supported" : "not supported");
3679 if (dev_priv
->psr
.psr2_support
) {
3680 dev_priv
->psr
.y_cord_support
=
3681 intel_dp_get_y_cord_status(intel_dp
);
3682 dev_priv
->psr
.colorimetry_support
=
3683 intel_dp_get_colorimetry_status(intel_dp
);
3684 dev_priv
->psr
.alpm
=
3685 intel_dp_get_alpm_status(intel_dp
);
3690 /* Read the eDP Display control capabilities registers */
3691 if ((intel_dp
->dpcd
[DP_EDP_CONFIGURATION_CAP
] & DP_DPCD_DISPLAY_CONTROL_CAPABLE
) &&
3692 drm_dp_dpcd_read(&intel_dp
->aux
, DP_EDP_DPCD_REV
,
3693 intel_dp
->edp_dpcd
, sizeof(intel_dp
->edp_dpcd
)) ==
3694 sizeof(intel_dp
->edp_dpcd
))
3695 DRM_DEBUG_KMS("EDP DPCD : %*ph\n", (int) sizeof(intel_dp
->edp_dpcd
),
3696 intel_dp
->edp_dpcd
);
3698 /* Intermediate frequency support */
3699 if (intel_dp
->edp_dpcd
[0] >= 0x03) { /* eDp v1.4 or higher */
3700 __le16 sink_rates
[DP_MAX_SUPPORTED_RATES
];
3703 drm_dp_dpcd_read(&intel_dp
->aux
, DP_SUPPORTED_LINK_RATES
,
3704 sink_rates
, sizeof(sink_rates
));
3706 for (i
= 0; i
< ARRAY_SIZE(sink_rates
); i
++) {
3707 int val
= le16_to_cpu(sink_rates
[i
]);
3712 /* Value read multiplied by 200kHz gives the per-lane
3713 * link rate in kHz. The source rates are, however,
3714 * stored in terms of LS_Clk kHz. The full conversion
3715 * back to symbols is
3716 * (val * 200kHz)*(8/10 ch. encoding)*(1/8 bit to Byte)
3718 intel_dp
->sink_rates
[i
] = (val
* 200) / 10;
3720 intel_dp
->num_sink_rates
= i
;
3723 if (intel_dp
->num_sink_rates
)
3724 intel_dp
->use_rate_select
= true;
3726 intel_dp_set_sink_rates(intel_dp
);
3728 intel_dp_set_common_rates(intel_dp
);
3735 intel_dp_get_dpcd(struct intel_dp
*intel_dp
)
3739 if (!intel_dp_read_dpcd(intel_dp
))
3742 /* Don't clobber cached eDP rates. */
3743 if (!is_edp(intel_dp
)) {
3744 intel_dp_set_sink_rates(intel_dp
);
3745 intel_dp_set_common_rates(intel_dp
);
3748 if (drm_dp_dpcd_readb(&intel_dp
->aux
, DP_SINK_COUNT
, &sink_count
) <= 0)
3752 * Sink count can change between short pulse hpd hence
3753 * a member variable in intel_dp will track any changes
3754 * between short pulse interrupts.
3756 intel_dp
->sink_count
= DP_GET_SINK_COUNT(sink_count
);
3759 * SINK_COUNT == 0 and DOWNSTREAM_PORT_PRESENT == 1 implies that
3760 * a dongle is present but no display. Unless we require to know
3761 * if a dongle is present or not, we don't need to update
3762 * downstream port information. So, an early return here saves
3763 * time from performing other operations which are not required.
3765 if (!is_edp(intel_dp
) && !intel_dp
->sink_count
)
3768 if (!drm_dp_is_branch(intel_dp
->dpcd
))
3769 return true; /* native DP sink */
3771 if (intel_dp
->dpcd
[DP_DPCD_REV
] == 0x10)
3772 return true; /* no per-port downstream info */
3774 if (drm_dp_dpcd_read(&intel_dp
->aux
, DP_DOWNSTREAM_PORT_0
,
3775 intel_dp
->downstream_ports
,
3776 DP_MAX_DOWNSTREAM_PORTS
) < 0)
3777 return false; /* downstream port status fetch failed */
3783 intel_dp_can_mst(struct intel_dp
*intel_dp
)
3787 if (!i915
.enable_dp_mst
)
3790 if (!intel_dp
->can_mst
)
3793 if (intel_dp
->dpcd
[DP_DPCD_REV
] < 0x12)
3796 if (drm_dp_dpcd_readb(&intel_dp
->aux
, DP_MSTM_CAP
, &mstm_cap
) != 1)
3799 return mstm_cap
& DP_MST_CAP
;
3803 intel_dp_configure_mst(struct intel_dp
*intel_dp
)
3805 if (!i915
.enable_dp_mst
)
3808 if (!intel_dp
->can_mst
)
3811 intel_dp
->is_mst
= intel_dp_can_mst(intel_dp
);
3813 if (intel_dp
->is_mst
)
3814 DRM_DEBUG_KMS("Sink is MST capable\n");
3816 DRM_DEBUG_KMS("Sink is not MST capable\n");
3818 drm_dp_mst_topology_mgr_set_mst(&intel_dp
->mst_mgr
,
3822 static int intel_dp_sink_crc_stop(struct intel_dp
*intel_dp
)
3824 struct intel_digital_port
*dig_port
= dp_to_dig_port(intel_dp
);
3825 struct drm_i915_private
*dev_priv
= to_i915(dig_port
->base
.base
.dev
);
3826 struct intel_crtc
*intel_crtc
= to_intel_crtc(dig_port
->base
.base
.crtc
);
3832 if (drm_dp_dpcd_readb(&intel_dp
->aux
, DP_TEST_SINK
, &buf
) < 0) {
3833 DRM_DEBUG_KMS("Sink CRC couldn't be stopped properly\n");
3838 if (drm_dp_dpcd_writeb(&intel_dp
->aux
, DP_TEST_SINK
,
3839 buf
& ~DP_TEST_SINK_START
) < 0) {
3840 DRM_DEBUG_KMS("Sink CRC couldn't be stopped properly\n");
3846 intel_wait_for_vblank(dev_priv
, intel_crtc
->pipe
);
3848 if (drm_dp_dpcd_readb(&intel_dp
->aux
,
3849 DP_TEST_SINK_MISC
, &buf
) < 0) {
3853 count
= buf
& DP_TEST_COUNT_MASK
;
3854 } while (--attempts
&& count
);
3856 if (attempts
== 0) {
3857 DRM_DEBUG_KMS("TIMEOUT: Sink CRC counter is not zeroed after calculation is stopped\n");
3862 hsw_enable_ips(intel_crtc
);
3866 static int intel_dp_sink_crc_start(struct intel_dp
*intel_dp
)
3868 struct intel_digital_port
*dig_port
= dp_to_dig_port(intel_dp
);
3869 struct drm_i915_private
*dev_priv
= to_i915(dig_port
->base
.base
.dev
);
3870 struct intel_crtc
*intel_crtc
= to_intel_crtc(dig_port
->base
.base
.crtc
);
3874 if (drm_dp_dpcd_readb(&intel_dp
->aux
, DP_TEST_SINK_MISC
, &buf
) < 0)
3877 if (!(buf
& DP_TEST_CRC_SUPPORTED
))
3880 if (drm_dp_dpcd_readb(&intel_dp
->aux
, DP_TEST_SINK
, &buf
) < 0)
3883 if (buf
& DP_TEST_SINK_START
) {
3884 ret
= intel_dp_sink_crc_stop(intel_dp
);
3889 hsw_disable_ips(intel_crtc
);
3891 if (drm_dp_dpcd_writeb(&intel_dp
->aux
, DP_TEST_SINK
,
3892 buf
| DP_TEST_SINK_START
) < 0) {
3893 hsw_enable_ips(intel_crtc
);
3897 intel_wait_for_vblank(dev_priv
, intel_crtc
->pipe
);
3901 int intel_dp_sink_crc(struct intel_dp
*intel_dp
, u8
*crc
)
3903 struct intel_digital_port
*dig_port
= dp_to_dig_port(intel_dp
);
3904 struct drm_i915_private
*dev_priv
= to_i915(dig_port
->base
.base
.dev
);
3905 struct intel_crtc
*intel_crtc
= to_intel_crtc(dig_port
->base
.base
.crtc
);
3910 ret
= intel_dp_sink_crc_start(intel_dp
);
3915 intel_wait_for_vblank(dev_priv
, intel_crtc
->pipe
);
3917 if (drm_dp_dpcd_readb(&intel_dp
->aux
,
3918 DP_TEST_SINK_MISC
, &buf
) < 0) {
3922 count
= buf
& DP_TEST_COUNT_MASK
;
3924 } while (--attempts
&& count
== 0);
3926 if (attempts
== 0) {
3927 DRM_ERROR("Panel is unable to calculate any CRC after 6 vblanks\n");
3932 if (drm_dp_dpcd_read(&intel_dp
->aux
, DP_TEST_CRC_R_CR
, crc
, 6) < 0) {
3938 intel_dp_sink_crc_stop(intel_dp
);
3943 intel_dp_get_sink_irq(struct intel_dp
*intel_dp
, u8
*sink_irq_vector
)
3945 return drm_dp_dpcd_readb(&intel_dp
->aux
, DP_DEVICE_SERVICE_IRQ_VECTOR
,
3946 sink_irq_vector
) == 1;
3950 intel_dp_get_sink_irq_esi(struct intel_dp
*intel_dp
, u8
*sink_irq_vector
)
3954 ret
= drm_dp_dpcd_read(&intel_dp
->aux
,
3956 sink_irq_vector
, 14);
3963 static uint8_t intel_dp_autotest_link_training(struct intel_dp
*intel_dp
)
3966 int min_lane_count
= 1;
3967 int link_rate_index
, test_link_rate
;
3968 uint8_t test_lane_count
, test_link_bw
;
3972 /* Read the TEST_LANE_COUNT and TEST_LINK_RTAE fields (DP CTS 3.1.4) */
3973 status
= drm_dp_dpcd_readb(&intel_dp
->aux
, DP_TEST_LANE_COUNT
,
3977 DRM_DEBUG_KMS("Lane count read failed\n");
3980 test_lane_count
&= DP_MAX_LANE_COUNT_MASK
;
3981 /* Validate the requested lane count */
3982 if (test_lane_count
< min_lane_count
||
3983 test_lane_count
> intel_dp
->max_link_lane_count
)
3986 status
= drm_dp_dpcd_readb(&intel_dp
->aux
, DP_TEST_LINK_RATE
,
3989 DRM_DEBUG_KMS("Link Rate read failed\n");
3992 /* Validate the requested link rate */
3993 test_link_rate
= drm_dp_bw_code_to_link_rate(test_link_bw
);
3994 link_rate_index
= intel_dp_rate_index(intel_dp
->common_rates
,
3995 intel_dp
->num_common_rates
,
3997 if (link_rate_index
< 0)
4000 intel_dp
->compliance
.test_lane_count
= test_lane_count
;
4001 intel_dp
->compliance
.test_link_rate
= test_link_rate
;
4006 static uint8_t intel_dp_autotest_video_pattern(struct intel_dp
*intel_dp
)
4008 uint8_t test_pattern
;
4010 __be16 h_width
, v_height
;
4013 /* Read the TEST_PATTERN (DP CTS 3.1.5) */
4014 status
= drm_dp_dpcd_readb(&intel_dp
->aux
, DP_TEST_PATTERN
,
4017 DRM_DEBUG_KMS("Test pattern read failed\n");
4020 if (test_pattern
!= DP_COLOR_RAMP
)
4023 status
= drm_dp_dpcd_read(&intel_dp
->aux
, DP_TEST_H_WIDTH_HI
,
4026 DRM_DEBUG_KMS("H Width read failed\n");
4030 status
= drm_dp_dpcd_read(&intel_dp
->aux
, DP_TEST_V_HEIGHT_HI
,
4033 DRM_DEBUG_KMS("V Height read failed\n");
4037 status
= drm_dp_dpcd_readb(&intel_dp
->aux
, DP_TEST_MISC0
,
4040 DRM_DEBUG_KMS("TEST MISC read failed\n");
4043 if ((test_misc
& DP_TEST_COLOR_FORMAT_MASK
) != DP_COLOR_FORMAT_RGB
)
4045 if (test_misc
& DP_TEST_DYNAMIC_RANGE_CEA
)
4047 switch (test_misc
& DP_TEST_BIT_DEPTH_MASK
) {
4048 case DP_TEST_BIT_DEPTH_6
:
4049 intel_dp
->compliance
.test_data
.bpc
= 6;
4051 case DP_TEST_BIT_DEPTH_8
:
4052 intel_dp
->compliance
.test_data
.bpc
= 8;
4058 intel_dp
->compliance
.test_data
.video_pattern
= test_pattern
;
4059 intel_dp
->compliance
.test_data
.hdisplay
= be16_to_cpu(h_width
);
4060 intel_dp
->compliance
.test_data
.vdisplay
= be16_to_cpu(v_height
);
4061 /* Set test active flag here so userspace doesn't interrupt things */
4062 intel_dp
->compliance
.test_active
= 1;
4067 static uint8_t intel_dp_autotest_edid(struct intel_dp
*intel_dp
)
4069 uint8_t test_result
= DP_TEST_ACK
;
4070 struct intel_connector
*intel_connector
= intel_dp
->attached_connector
;
4071 struct drm_connector
*connector
= &intel_connector
->base
;
4073 if (intel_connector
->detect_edid
== NULL
||
4074 connector
->edid_corrupt
||
4075 intel_dp
->aux
.i2c_defer_count
> 6) {
4076 /* Check EDID read for NACKs, DEFERs and corruption
4077 * (DP CTS 1.2 Core r1.1)
4078 * 4.2.2.4 : Failed EDID read, I2C_NAK
4079 * 4.2.2.5 : Failed EDID read, I2C_DEFER
4080 * 4.2.2.6 : EDID corruption detected
4081 * Use failsafe mode for all cases
4083 if (intel_dp
->aux
.i2c_nack_count
> 0 ||
4084 intel_dp
->aux
.i2c_defer_count
> 0)
4085 DRM_DEBUG_KMS("EDID read had %d NACKs, %d DEFERs\n",
4086 intel_dp
->aux
.i2c_nack_count
,
4087 intel_dp
->aux
.i2c_defer_count
);
4088 intel_dp
->compliance
.test_data
.edid
= INTEL_DP_RESOLUTION_FAILSAFE
;
4090 struct edid
*block
= intel_connector
->detect_edid
;
4092 /* We have to write the checksum
4093 * of the last block read
4095 block
+= intel_connector
->detect_edid
->extensions
;
4097 if (drm_dp_dpcd_writeb(&intel_dp
->aux
, DP_TEST_EDID_CHECKSUM
,
4098 block
->checksum
) <= 0)
4099 DRM_DEBUG_KMS("Failed to write EDID checksum\n");
4101 test_result
= DP_TEST_ACK
| DP_TEST_EDID_CHECKSUM_WRITE
;
4102 intel_dp
->compliance
.test_data
.edid
= INTEL_DP_RESOLUTION_PREFERRED
;
4105 /* Set test active flag here so userspace doesn't interrupt things */
4106 intel_dp
->compliance
.test_active
= 1;
4111 static uint8_t intel_dp_autotest_phy_pattern(struct intel_dp
*intel_dp
)
4113 uint8_t test_result
= DP_TEST_NAK
;
4117 static void intel_dp_handle_test_request(struct intel_dp
*intel_dp
)
4119 uint8_t response
= DP_TEST_NAK
;
4120 uint8_t request
= 0;
4123 status
= drm_dp_dpcd_readb(&intel_dp
->aux
, DP_TEST_REQUEST
, &request
);
4125 DRM_DEBUG_KMS("Could not read test request from sink\n");
4130 case DP_TEST_LINK_TRAINING
:
4131 DRM_DEBUG_KMS("LINK_TRAINING test requested\n");
4132 response
= intel_dp_autotest_link_training(intel_dp
);
4134 case DP_TEST_LINK_VIDEO_PATTERN
:
4135 DRM_DEBUG_KMS("TEST_PATTERN test requested\n");
4136 response
= intel_dp_autotest_video_pattern(intel_dp
);
4138 case DP_TEST_LINK_EDID_READ
:
4139 DRM_DEBUG_KMS("EDID test requested\n");
4140 response
= intel_dp_autotest_edid(intel_dp
);
4142 case DP_TEST_LINK_PHY_TEST_PATTERN
:
4143 DRM_DEBUG_KMS("PHY_PATTERN test requested\n");
4144 response
= intel_dp_autotest_phy_pattern(intel_dp
);
4147 DRM_DEBUG_KMS("Invalid test request '%02x'\n", request
);
4151 if (response
& DP_TEST_ACK
)
4152 intel_dp
->compliance
.test_type
= request
;
4155 status
= drm_dp_dpcd_writeb(&intel_dp
->aux
, DP_TEST_RESPONSE
, response
);
4157 DRM_DEBUG_KMS("Could not write test response to sink\n");
4161 intel_dp_check_mst_status(struct intel_dp
*intel_dp
)
4165 if (intel_dp
->is_mst
) {
4170 bret
= intel_dp_get_sink_irq_esi(intel_dp
, esi
);
4174 /* check link status - esi[10] = 0x200c */
4175 if (intel_dp
->active_mst_links
&&
4176 !drm_dp_channel_eq_ok(&esi
[10], intel_dp
->lane_count
)) {
4177 DRM_DEBUG_KMS("channel EQ not ok, retraining\n");
4178 intel_dp_start_link_train(intel_dp
);
4179 intel_dp_stop_link_train(intel_dp
);
4182 DRM_DEBUG_KMS("got esi %3ph\n", esi
);
4183 ret
= drm_dp_mst_hpd_irq(&intel_dp
->mst_mgr
, esi
, &handled
);
4186 for (retry
= 0; retry
< 3; retry
++) {
4188 wret
= drm_dp_dpcd_write(&intel_dp
->aux
,
4189 DP_SINK_COUNT_ESI
+1,
4196 bret
= intel_dp_get_sink_irq_esi(intel_dp
, esi
);
4198 DRM_DEBUG_KMS("got esi2 %3ph\n", esi
);
4206 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
4207 DRM_DEBUG_KMS("failed to get ESI - device may have failed\n");
4208 intel_dp
->is_mst
= false;
4209 drm_dp_mst_topology_mgr_set_mst(&intel_dp
->mst_mgr
, intel_dp
->is_mst
);
4210 /* send a hotplug event */
4211 drm_kms_helper_hotplug_event(intel_dig_port
->base
.base
.dev
);
4218 intel_dp_retrain_link(struct intel_dp
*intel_dp
)
4220 struct intel_encoder
*encoder
= &dp_to_dig_port(intel_dp
)->base
;
4221 struct drm_i915_private
*dev_priv
= to_i915(encoder
->base
.dev
);
4222 struct intel_crtc
*crtc
= to_intel_crtc(encoder
->base
.crtc
);
4224 /* Suppress underruns caused by re-training */
4225 intel_set_cpu_fifo_underrun_reporting(dev_priv
, crtc
->pipe
, false);
4226 if (crtc
->config
->has_pch_encoder
)
4227 intel_set_pch_fifo_underrun_reporting(dev_priv
,
4228 intel_crtc_pch_transcoder(crtc
), false);
4230 intel_dp_start_link_train(intel_dp
);
4231 intel_dp_stop_link_train(intel_dp
);
4233 /* Keep underrun reporting disabled until things are stable */
4234 intel_wait_for_vblank(dev_priv
, crtc
->pipe
);
4236 intel_set_cpu_fifo_underrun_reporting(dev_priv
, crtc
->pipe
, true);
4237 if (crtc
->config
->has_pch_encoder
)
4238 intel_set_pch_fifo_underrun_reporting(dev_priv
,
4239 intel_crtc_pch_transcoder(crtc
), true);
4243 intel_dp_check_link_status(struct intel_dp
*intel_dp
)
4245 struct intel_encoder
*intel_encoder
= &dp_to_dig_port(intel_dp
)->base
;
4246 struct drm_device
*dev
= intel_dp_to_dev(intel_dp
);
4247 u8 link_status
[DP_LINK_STATUS_SIZE
];
4249 WARN_ON(!drm_modeset_is_locked(&dev
->mode_config
.connection_mutex
));
4251 if (!intel_dp_get_link_status(intel_dp
, link_status
)) {
4252 DRM_ERROR("Failed to get link status\n");
4256 if (!intel_encoder
->base
.crtc
)
4259 if (!to_intel_crtc(intel_encoder
->base
.crtc
)->active
)
4263 * Validate the cached values of intel_dp->link_rate and
4264 * intel_dp->lane_count before attempting to retrain.
4266 if (!intel_dp_link_params_valid(intel_dp
))
4269 /* Retrain if Channel EQ or CR not ok */
4270 if (!drm_dp_channel_eq_ok(link_status
, intel_dp
->lane_count
)) {
4271 DRM_DEBUG_KMS("%s: channel EQ not ok, retraining\n",
4272 intel_encoder
->base
.name
);
4274 intel_dp_retrain_link(intel_dp
);
4279 * According to DP spec
4282 * 2. Configure link according to Receiver Capabilities
4283 * 3. Use Link Training from 2.5.3.3 and 3.5.1.3
4284 * 4. Check link status on receipt of hot-plug interrupt
4286 * intel_dp_short_pulse - handles short pulse interrupts
4287 * when full detection is not required.
4288 * Returns %true if short pulse is handled and full detection
4289 * is NOT required and %false otherwise.
4292 intel_dp_short_pulse(struct intel_dp
*intel_dp
)
4294 struct drm_device
*dev
= intel_dp_to_dev(intel_dp
);
4295 struct intel_encoder
*intel_encoder
= &dp_to_dig_port(intel_dp
)->base
;
4296 u8 sink_irq_vector
= 0;
4297 u8 old_sink_count
= intel_dp
->sink_count
;
4301 * Clearing compliance test variables to allow capturing
4302 * of values for next automated test request.
4304 memset(&intel_dp
->compliance
, 0, sizeof(intel_dp
->compliance
));
4307 * Now read the DPCD to see if it's actually running
4308 * If the current value of sink count doesn't match with
4309 * the value that was stored earlier or dpcd read failed
4310 * we need to do full detection
4312 ret
= intel_dp_get_dpcd(intel_dp
);
4314 if ((old_sink_count
!= intel_dp
->sink_count
) || !ret
) {
4315 /* No need to proceed if we are going to do full detect */
4319 /* Try to read the source of the interrupt */
4320 if (intel_dp
->dpcd
[DP_DPCD_REV
] >= 0x11 &&
4321 intel_dp_get_sink_irq(intel_dp
, &sink_irq_vector
) &&
4322 sink_irq_vector
!= 0) {
4323 /* Clear interrupt source */
4324 drm_dp_dpcd_writeb(&intel_dp
->aux
,
4325 DP_DEVICE_SERVICE_IRQ_VECTOR
,
4328 if (sink_irq_vector
& DP_AUTOMATED_TEST_REQUEST
)
4329 intel_dp_handle_test_request(intel_dp
);
4330 if (sink_irq_vector
& (DP_CP_IRQ
| DP_SINK_SPECIFIC_IRQ
))
4331 DRM_DEBUG_DRIVER("CP or sink specific irq unhandled\n");
4334 drm_modeset_lock(&dev
->mode_config
.connection_mutex
, NULL
);
4335 intel_dp_check_link_status(intel_dp
);
4336 drm_modeset_unlock(&dev
->mode_config
.connection_mutex
);
4337 if (intel_dp
->compliance
.test_type
== DP_TEST_LINK_TRAINING
) {
4338 DRM_DEBUG_KMS("Link Training Compliance Test requested\n");
4339 /* Send a Hotplug Uevent to userspace to start modeset */
4340 drm_kms_helper_hotplug_event(intel_encoder
->base
.dev
);
4346 /* XXX this is probably wrong for multiple downstream ports */
4347 static enum drm_connector_status
4348 intel_dp_detect_dpcd(struct intel_dp
*intel_dp
)
4350 struct intel_lspcon
*lspcon
= dp_to_lspcon(intel_dp
);
4351 uint8_t *dpcd
= intel_dp
->dpcd
;
4355 lspcon_resume(lspcon
);
4357 if (!intel_dp_get_dpcd(intel_dp
))
4358 return connector_status_disconnected
;
4360 if (is_edp(intel_dp
))
4361 return connector_status_connected
;
4363 /* if there's no downstream port, we're done */
4364 if (!drm_dp_is_branch(dpcd
))
4365 return connector_status_connected
;
4367 /* If we're HPD-aware, SINK_COUNT changes dynamically */
4368 if (intel_dp
->dpcd
[DP_DPCD_REV
] >= 0x11 &&
4369 intel_dp
->downstream_ports
[0] & DP_DS_PORT_HPD
) {
4371 return intel_dp
->sink_count
?
4372 connector_status_connected
: connector_status_disconnected
;
4375 if (intel_dp_can_mst(intel_dp
))
4376 return connector_status_connected
;
4378 /* If no HPD, poke DDC gently */
4379 if (drm_probe_ddc(&intel_dp
->aux
.ddc
))
4380 return connector_status_connected
;
4382 /* Well we tried, say unknown for unreliable port types */
4383 if (intel_dp
->dpcd
[DP_DPCD_REV
] >= 0x11) {
4384 type
= intel_dp
->downstream_ports
[0] & DP_DS_PORT_TYPE_MASK
;
4385 if (type
== DP_DS_PORT_TYPE_VGA
||
4386 type
== DP_DS_PORT_TYPE_NON_EDID
)
4387 return connector_status_unknown
;
4389 type
= intel_dp
->dpcd
[DP_DOWNSTREAMPORT_PRESENT
] &
4390 DP_DWN_STRM_PORT_TYPE_MASK
;
4391 if (type
== DP_DWN_STRM_PORT_TYPE_ANALOG
||
4392 type
== DP_DWN_STRM_PORT_TYPE_OTHER
)
4393 return connector_status_unknown
;
4396 /* Anything else is out of spec, warn and ignore */
4397 DRM_DEBUG_KMS("Broken DP branch device, ignoring\n");
4398 return connector_status_disconnected
;
4401 static enum drm_connector_status
4402 edp_detect(struct intel_dp
*intel_dp
)
4404 struct drm_device
*dev
= intel_dp_to_dev(intel_dp
);
4405 struct drm_i915_private
*dev_priv
= to_i915(dev
);
4406 enum drm_connector_status status
;
4408 status
= intel_panel_detect(dev_priv
);
4409 if (status
== connector_status_unknown
)
4410 status
= connector_status_connected
;
4415 static bool ibx_digital_port_connected(struct drm_i915_private
*dev_priv
,
4416 struct intel_digital_port
*port
)
4420 switch (port
->port
) {
4424 bit
= SDE_PORTB_HOTPLUG
;
4427 bit
= SDE_PORTC_HOTPLUG
;
4430 bit
= SDE_PORTD_HOTPLUG
;
4433 MISSING_CASE(port
->port
);
4437 return I915_READ(SDEISR
) & bit
;
4440 static bool cpt_digital_port_connected(struct drm_i915_private
*dev_priv
,
4441 struct intel_digital_port
*port
)
4445 switch (port
->port
) {
4449 bit
= SDE_PORTB_HOTPLUG_CPT
;
4452 bit
= SDE_PORTC_HOTPLUG_CPT
;
4455 bit
= SDE_PORTD_HOTPLUG_CPT
;
4458 bit
= SDE_PORTE_HOTPLUG_SPT
;
4461 MISSING_CASE(port
->port
);
4465 return I915_READ(SDEISR
) & bit
;
4468 static bool g4x_digital_port_connected(struct drm_i915_private
*dev_priv
,
4469 struct intel_digital_port
*port
)
4473 switch (port
->port
) {
4475 bit
= PORTB_HOTPLUG_LIVE_STATUS_G4X
;
4478 bit
= PORTC_HOTPLUG_LIVE_STATUS_G4X
;
4481 bit
= PORTD_HOTPLUG_LIVE_STATUS_G4X
;
4484 MISSING_CASE(port
->port
);
4488 return I915_READ(PORT_HOTPLUG_STAT
) & bit
;
4491 static bool gm45_digital_port_connected(struct drm_i915_private
*dev_priv
,
4492 struct intel_digital_port
*port
)
4496 switch (port
->port
) {
4498 bit
= PORTB_HOTPLUG_LIVE_STATUS_GM45
;
4501 bit
= PORTC_HOTPLUG_LIVE_STATUS_GM45
;
4504 bit
= PORTD_HOTPLUG_LIVE_STATUS_GM45
;
4507 MISSING_CASE(port
->port
);
4511 return I915_READ(PORT_HOTPLUG_STAT
) & bit
;
4514 static bool bxt_digital_port_connected(struct drm_i915_private
*dev_priv
,
4515 struct intel_digital_port
*intel_dig_port
)
4517 struct intel_encoder
*intel_encoder
= &intel_dig_port
->base
;
4521 intel_hpd_pin_to_port(intel_encoder
->hpd_pin
, &port
);
4524 bit
= BXT_DE_PORT_HP_DDIA
;
4527 bit
= BXT_DE_PORT_HP_DDIB
;
4530 bit
= BXT_DE_PORT_HP_DDIC
;
4537 return I915_READ(GEN8_DE_PORT_ISR
) & bit
;
4541 * intel_digital_port_connected - is the specified port connected?
4542 * @dev_priv: i915 private structure
4543 * @port: the port to test
4545 * Return %true if @port is connected, %false otherwise.
4547 bool intel_digital_port_connected(struct drm_i915_private
*dev_priv
,
4548 struct intel_digital_port
*port
)
4550 if (HAS_PCH_IBX(dev_priv
))
4551 return ibx_digital_port_connected(dev_priv
, port
);
4552 else if (HAS_PCH_SPLIT(dev_priv
))
4553 return cpt_digital_port_connected(dev_priv
, port
);
4554 else if (IS_GEN9_LP(dev_priv
))
4555 return bxt_digital_port_connected(dev_priv
, port
);
4556 else if (IS_GM45(dev_priv
))
4557 return gm45_digital_port_connected(dev_priv
, port
);
4559 return g4x_digital_port_connected(dev_priv
, port
);
4562 static struct edid
*
4563 intel_dp_get_edid(struct intel_dp
*intel_dp
)
4565 struct intel_connector
*intel_connector
= intel_dp
->attached_connector
;
4567 /* use cached edid if we have one */
4568 if (intel_connector
->edid
) {
4570 if (IS_ERR(intel_connector
->edid
))
4573 return drm_edid_duplicate(intel_connector
->edid
);
4575 return drm_get_edid(&intel_connector
->base
,
4576 &intel_dp
->aux
.ddc
);
4580 intel_dp_set_edid(struct intel_dp
*intel_dp
)
4582 struct intel_connector
*intel_connector
= intel_dp
->attached_connector
;
4585 intel_dp_unset_edid(intel_dp
);
4586 edid
= intel_dp_get_edid(intel_dp
);
4587 intel_connector
->detect_edid
= edid
;
4589 intel_dp
->has_audio
= drm_detect_monitor_audio(edid
);
4593 intel_dp_unset_edid(struct intel_dp
*intel_dp
)
4595 struct intel_connector
*intel_connector
= intel_dp
->attached_connector
;
4597 kfree(intel_connector
->detect_edid
);
4598 intel_connector
->detect_edid
= NULL
;
4600 intel_dp
->has_audio
= false;
4604 intel_dp_long_pulse(struct intel_connector
*intel_connector
)
4606 struct drm_connector
*connector
= &intel_connector
->base
;
4607 struct intel_dp
*intel_dp
= intel_attached_dp(connector
);
4608 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
4609 struct intel_encoder
*intel_encoder
= &intel_dig_port
->base
;
4610 struct drm_device
*dev
= connector
->dev
;
4611 enum drm_connector_status status
;
4612 u8 sink_irq_vector
= 0;
4614 WARN_ON(!drm_modeset_is_locked(&connector
->dev
->mode_config
.connection_mutex
));
4616 intel_display_power_get(to_i915(dev
), intel_dp
->aux_power_domain
);
4618 /* Can't disconnect eDP, but you can close the lid... */
4619 if (is_edp(intel_dp
))
4620 status
= edp_detect(intel_dp
);
4621 else if (intel_digital_port_connected(to_i915(dev
),
4622 dp_to_dig_port(intel_dp
)))
4623 status
= intel_dp_detect_dpcd(intel_dp
);
4625 status
= connector_status_disconnected
;
4627 if (status
== connector_status_disconnected
) {
4628 memset(&intel_dp
->compliance
, 0, sizeof(intel_dp
->compliance
));
4630 if (intel_dp
->is_mst
) {
4631 DRM_DEBUG_KMS("MST device may have disappeared %d vs %d\n",
4633 intel_dp
->mst_mgr
.mst_state
);
4634 intel_dp
->is_mst
= false;
4635 drm_dp_mst_topology_mgr_set_mst(&intel_dp
->mst_mgr
,
4642 if (intel_encoder
->type
!= INTEL_OUTPUT_EDP
)
4643 intel_encoder
->type
= INTEL_OUTPUT_DP
;
4645 DRM_DEBUG_KMS("Display Port TPS3 support: source %s, sink %s\n",
4646 yesno(intel_dp_source_supports_hbr2(intel_dp
)),
4647 yesno(drm_dp_tps3_supported(intel_dp
->dpcd
)));
4649 if (intel_dp
->reset_link_params
) {
4650 /* Initial max link lane count */
4651 intel_dp
->max_link_lane_count
= intel_dp_max_common_lane_count(intel_dp
);
4653 /* Initial max link rate */
4654 intel_dp
->max_link_rate
= intel_dp_max_common_rate(intel_dp
);
4656 intel_dp
->reset_link_params
= false;
4659 intel_dp_print_rates(intel_dp
);
4661 drm_dp_read_desc(&intel_dp
->aux
, &intel_dp
->desc
,
4662 drm_dp_is_branch(intel_dp
->dpcd
));
4664 intel_dp_configure_mst(intel_dp
);
4666 if (intel_dp
->is_mst
) {
4668 * If we are in MST mode then this connector
4669 * won't appear connected or have anything
4672 status
= connector_status_disconnected
;
4676 * If display is now connected check links status,
4677 * there has been known issues of link loss triggerring
4680 * Some sinks (eg. ASUS PB287Q) seem to perform some
4681 * weird HPD ping pong during modesets. So we can apparently
4682 * end up with HPD going low during a modeset, and then
4683 * going back up soon after. And once that happens we must
4684 * retrain the link to get a picture. That's in case no
4685 * userspace component reacted to intermittent HPD dip.
4687 intel_dp_check_link_status(intel_dp
);
4691 * Clearing NACK and defer counts to get their exact values
4692 * while reading EDID which are required by Compliance tests
4693 * 4.2.2.4 and 4.2.2.5
4695 intel_dp
->aux
.i2c_nack_count
= 0;
4696 intel_dp
->aux
.i2c_defer_count
= 0;
4698 intel_dp_set_edid(intel_dp
);
4699 if (is_edp(intel_dp
) || intel_connector
->detect_edid
)
4700 status
= connector_status_connected
;
4701 intel_dp
->detect_done
= true;
4703 /* Try to read the source of the interrupt */
4704 if (intel_dp
->dpcd
[DP_DPCD_REV
] >= 0x11 &&
4705 intel_dp_get_sink_irq(intel_dp
, &sink_irq_vector
) &&
4706 sink_irq_vector
!= 0) {
4707 /* Clear interrupt source */
4708 drm_dp_dpcd_writeb(&intel_dp
->aux
,
4709 DP_DEVICE_SERVICE_IRQ_VECTOR
,
4712 if (sink_irq_vector
& DP_AUTOMATED_TEST_REQUEST
)
4713 intel_dp_handle_test_request(intel_dp
);
4714 if (sink_irq_vector
& (DP_CP_IRQ
| DP_SINK_SPECIFIC_IRQ
))
4715 DRM_DEBUG_DRIVER("CP or sink specific irq unhandled\n");
4719 if (status
!= connector_status_connected
&& !intel_dp
->is_mst
)
4720 intel_dp_unset_edid(intel_dp
);
4722 intel_display_power_put(to_i915(dev
), intel_dp
->aux_power_domain
);
4727 intel_dp_detect(struct drm_connector
*connector
,
4728 struct drm_modeset_acquire_ctx
*ctx
,
4731 struct intel_dp
*intel_dp
= intel_attached_dp(connector
);
4732 int status
= connector
->status
;
4734 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
4735 connector
->base
.id
, connector
->name
);
4737 /* If full detect is not performed yet, do a full detect */
4738 if (!intel_dp
->detect_done
)
4739 status
= intel_dp_long_pulse(intel_dp
->attached_connector
);
4741 intel_dp
->detect_done
= false;
4747 intel_dp_force(struct drm_connector
*connector
)
4749 struct intel_dp
*intel_dp
= intel_attached_dp(connector
);
4750 struct intel_encoder
*intel_encoder
= &dp_to_dig_port(intel_dp
)->base
;
4751 struct drm_i915_private
*dev_priv
= to_i915(intel_encoder
->base
.dev
);
4753 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
4754 connector
->base
.id
, connector
->name
);
4755 intel_dp_unset_edid(intel_dp
);
4757 if (connector
->status
!= connector_status_connected
)
4760 intel_display_power_get(dev_priv
, intel_dp
->aux_power_domain
);
4762 intel_dp_set_edid(intel_dp
);
4764 intel_display_power_put(dev_priv
, intel_dp
->aux_power_domain
);
4766 if (intel_encoder
->type
!= INTEL_OUTPUT_EDP
)
4767 intel_encoder
->type
= INTEL_OUTPUT_DP
;
4770 static int intel_dp_get_modes(struct drm_connector
*connector
)
4772 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
4775 edid
= intel_connector
->detect_edid
;
4777 int ret
= intel_connector_update_modes(connector
, edid
);
4782 /* if eDP has no EDID, fall back to fixed mode */
4783 if (is_edp(intel_attached_dp(connector
)) &&
4784 intel_connector
->panel
.fixed_mode
) {
4785 struct drm_display_mode
*mode
;
4787 mode
= drm_mode_duplicate(connector
->dev
,
4788 intel_connector
->panel
.fixed_mode
);
4790 drm_mode_probed_add(connector
, mode
);
4799 intel_dp_connector_register(struct drm_connector
*connector
)
4801 struct intel_dp
*intel_dp
= intel_attached_dp(connector
);
4804 ret
= intel_connector_register(connector
);
4808 i915_debugfs_connector_add(connector
);
4810 DRM_DEBUG_KMS("registering %s bus for %s\n",
4811 intel_dp
->aux
.name
, connector
->kdev
->kobj
.name
);
4813 intel_dp
->aux
.dev
= connector
->kdev
;
4814 return drm_dp_aux_register(&intel_dp
->aux
);
4818 intel_dp_connector_unregister(struct drm_connector
*connector
)
4820 drm_dp_aux_unregister(&intel_attached_dp(connector
)->aux
);
4821 intel_connector_unregister(connector
);
4825 intel_dp_connector_destroy(struct drm_connector
*connector
)
4827 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
4829 kfree(intel_connector
->detect_edid
);
4831 if (!IS_ERR_OR_NULL(intel_connector
->edid
))
4832 kfree(intel_connector
->edid
);
4834 /* Can't call is_edp() since the encoder may have been destroyed
4836 if (connector
->connector_type
== DRM_MODE_CONNECTOR_eDP
)
4837 intel_panel_fini(&intel_connector
->panel
);
4839 drm_connector_cleanup(connector
);
4843 void intel_dp_encoder_destroy(struct drm_encoder
*encoder
)
4845 struct intel_digital_port
*intel_dig_port
= enc_to_dig_port(encoder
);
4846 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
4848 intel_dp_mst_encoder_cleanup(intel_dig_port
);
4849 if (is_edp(intel_dp
)) {
4850 cancel_delayed_work_sync(&intel_dp
->panel_vdd_work
);
4852 * vdd might still be enabled do to the delayed vdd off.
4853 * Make sure vdd is actually turned off here.
4856 edp_panel_vdd_off_sync(intel_dp
);
4857 pps_unlock(intel_dp
);
4859 if (intel_dp
->edp_notifier
.notifier_call
) {
4860 unregister_reboot_notifier(&intel_dp
->edp_notifier
);
4861 intel_dp
->edp_notifier
.notifier_call
= NULL
;
4865 intel_dp_aux_fini(intel_dp
);
4867 drm_encoder_cleanup(encoder
);
4868 kfree(intel_dig_port
);
4871 void intel_dp_encoder_suspend(struct intel_encoder
*intel_encoder
)
4873 struct intel_dp
*intel_dp
= enc_to_intel_dp(&intel_encoder
->base
);
4875 if (!is_edp(intel_dp
))
4879 * vdd might still be enabled do to the delayed vdd off.
4880 * Make sure vdd is actually turned off here.
4882 cancel_delayed_work_sync(&intel_dp
->panel_vdd_work
);
4884 edp_panel_vdd_off_sync(intel_dp
);
4885 pps_unlock(intel_dp
);
4888 static void intel_edp_panel_vdd_sanitize(struct intel_dp
*intel_dp
)
4890 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
4891 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
4892 struct drm_i915_private
*dev_priv
= to_i915(dev
);
4894 lockdep_assert_held(&dev_priv
->pps_mutex
);
4896 if (!edp_have_panel_vdd(intel_dp
))
4900 * The VDD bit needs a power domain reference, so if the bit is
4901 * already enabled when we boot or resume, grab this reference and
4902 * schedule a vdd off, so we don't hold on to the reference
4905 DRM_DEBUG_KMS("VDD left on by BIOS, adjusting state tracking\n");
4906 intel_display_power_get(dev_priv
, intel_dp
->aux_power_domain
);
4908 edp_panel_vdd_schedule_off(intel_dp
);
4911 static enum pipe
vlv_active_pipe(struct intel_dp
*intel_dp
)
4913 struct drm_i915_private
*dev_priv
= to_i915(intel_dp_to_dev(intel_dp
));
4915 if ((intel_dp
->DP
& DP_PORT_EN
) == 0)
4916 return INVALID_PIPE
;
4918 if (IS_CHERRYVIEW(dev_priv
))
4919 return DP_PORT_TO_PIPE_CHV(intel_dp
->DP
);
4921 return PORT_TO_PIPE(intel_dp
->DP
);
4924 void intel_dp_encoder_reset(struct drm_encoder
*encoder
)
4926 struct drm_i915_private
*dev_priv
= to_i915(encoder
->dev
);
4927 struct intel_dp
*intel_dp
= enc_to_intel_dp(encoder
);
4928 struct intel_lspcon
*lspcon
= dp_to_lspcon(intel_dp
);
4930 if (!HAS_DDI(dev_priv
))
4931 intel_dp
->DP
= I915_READ(intel_dp
->output_reg
);
4934 lspcon_resume(lspcon
);
4936 intel_dp
->reset_link_params
= true;
4940 if (IS_VALLEYVIEW(dev_priv
) || IS_CHERRYVIEW(dev_priv
))
4941 intel_dp
->active_pipe
= vlv_active_pipe(intel_dp
);
4943 if (is_edp(intel_dp
)) {
4944 /* Reinit the power sequencer, in case BIOS did something with it. */
4945 intel_dp_pps_init(encoder
->dev
, intel_dp
);
4946 intel_edp_panel_vdd_sanitize(intel_dp
);
4949 pps_unlock(intel_dp
);
4952 static const struct drm_connector_funcs intel_dp_connector_funcs
= {
4953 .dpms
= drm_atomic_helper_connector_dpms
,
4954 .force
= intel_dp_force
,
4955 .fill_modes
= drm_helper_probe_single_connector_modes
,
4956 .set_property
= drm_atomic_helper_connector_set_property
,
4957 .atomic_get_property
= intel_digital_connector_atomic_get_property
,
4958 .atomic_set_property
= intel_digital_connector_atomic_set_property
,
4959 .late_register
= intel_dp_connector_register
,
4960 .early_unregister
= intel_dp_connector_unregister
,
4961 .destroy
= intel_dp_connector_destroy
,
4962 .atomic_destroy_state
= drm_atomic_helper_connector_destroy_state
,
4963 .atomic_duplicate_state
= intel_digital_connector_duplicate_state
,
4966 static const struct drm_connector_helper_funcs intel_dp_connector_helper_funcs
= {
4967 .detect_ctx
= intel_dp_detect
,
4968 .get_modes
= intel_dp_get_modes
,
4969 .mode_valid
= intel_dp_mode_valid
,
4970 .atomic_check
= intel_digital_connector_atomic_check
,
4973 static const struct drm_encoder_funcs intel_dp_enc_funcs
= {
4974 .reset
= intel_dp_encoder_reset
,
4975 .destroy
= intel_dp_encoder_destroy
,
4979 intel_dp_hpd_pulse(struct intel_digital_port
*intel_dig_port
, bool long_hpd
)
4981 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
4982 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
4983 struct drm_i915_private
*dev_priv
= to_i915(dev
);
4984 enum irqreturn ret
= IRQ_NONE
;
4986 if (intel_dig_port
->base
.type
!= INTEL_OUTPUT_EDP
&&
4987 intel_dig_port
->base
.type
!= INTEL_OUTPUT_HDMI
)
4988 intel_dig_port
->base
.type
= INTEL_OUTPUT_DP
;
4990 if (long_hpd
&& intel_dig_port
->base
.type
== INTEL_OUTPUT_EDP
) {
4992 * vdd off can generate a long pulse on eDP which
4993 * would require vdd on to handle it, and thus we
4994 * would end up in an endless cycle of
4995 * "vdd off -> long hpd -> vdd on -> detect -> vdd off -> ..."
4997 DRM_DEBUG_KMS("ignoring long hpd on eDP port %c\n",
4998 port_name(intel_dig_port
->port
));
5002 DRM_DEBUG_KMS("got hpd irq on port %c - %s\n",
5003 port_name(intel_dig_port
->port
),
5004 long_hpd
? "long" : "short");
5007 intel_dp
->reset_link_params
= true;
5008 intel_dp
->detect_done
= false;
5012 intel_display_power_get(dev_priv
, intel_dp
->aux_power_domain
);
5014 if (intel_dp
->is_mst
) {
5015 if (intel_dp_check_mst_status(intel_dp
) == -EINVAL
) {
5017 * If we were in MST mode, and device is not
5018 * there, get out of MST mode
5020 DRM_DEBUG_KMS("MST device may have disappeared %d vs %d\n",
5021 intel_dp
->is_mst
, intel_dp
->mst_mgr
.mst_state
);
5022 intel_dp
->is_mst
= false;
5023 drm_dp_mst_topology_mgr_set_mst(&intel_dp
->mst_mgr
,
5025 intel_dp
->detect_done
= false;
5030 if (!intel_dp
->is_mst
) {
5031 if (!intel_dp_short_pulse(intel_dp
)) {
5032 intel_dp
->detect_done
= false;
5040 intel_display_power_put(dev_priv
, intel_dp
->aux_power_domain
);
5045 /* check the VBT to see whether the eDP is on another port */
5046 bool intel_dp_is_edp(struct drm_i915_private
*dev_priv
, enum port port
)
5049 * eDP not supported on g4x. so bail out early just
5050 * for a bit extra safety in case the VBT is bonkers.
5052 if (INTEL_GEN(dev_priv
) < 5)
5055 if (INTEL_GEN(dev_priv
) < 9 && port
== PORT_A
)
5058 return intel_bios_is_port_edp(dev_priv
, port
);
5062 intel_dp_add_properties(struct intel_dp
*intel_dp
, struct drm_connector
*connector
)
5064 struct drm_i915_private
*dev_priv
= to_i915(connector
->dev
);
5066 intel_attach_force_audio_property(connector
);
5067 intel_attach_broadcast_rgb_property(connector
);
5069 if (is_edp(intel_dp
)) {
5070 u32 allowed_scalers
;
5072 allowed_scalers
= BIT(DRM_MODE_SCALE_ASPECT
) | BIT(DRM_MODE_SCALE_FULLSCREEN
);
5073 if (!HAS_GMCH_DISPLAY(dev_priv
))
5074 allowed_scalers
|= BIT(DRM_MODE_SCALE_CENTER
);
5076 drm_connector_attach_scaling_mode_property(connector
, allowed_scalers
);
5078 connector
->state
->scaling_mode
= DRM_MODE_SCALE_ASPECT
;
5083 static void intel_dp_init_panel_power_timestamps(struct intel_dp
*intel_dp
)
5085 intel_dp
->panel_power_off_time
= ktime_get_boottime();
5086 intel_dp
->last_power_on
= jiffies
;
5087 intel_dp
->last_backlight_off
= jiffies
;
5091 intel_pps_readout_hw_state(struct drm_i915_private
*dev_priv
,
5092 struct intel_dp
*intel_dp
, struct edp_power_seq
*seq
)
5094 u32 pp_on
, pp_off
, pp_div
= 0, pp_ctl
= 0;
5095 struct pps_registers regs
;
5097 intel_pps_get_registers(dev_priv
, intel_dp
, ®s
);
5099 /* Workaround: Need to write PP_CONTROL with the unlock key as
5100 * the very first thing. */
5101 pp_ctl
= ironlake_get_pp_control(intel_dp
);
5103 pp_on
= I915_READ(regs
.pp_on
);
5104 pp_off
= I915_READ(regs
.pp_off
);
5105 if (!IS_GEN9_LP(dev_priv
) && !HAS_PCH_CNP(dev_priv
)) {
5106 I915_WRITE(regs
.pp_ctrl
, pp_ctl
);
5107 pp_div
= I915_READ(regs
.pp_div
);
5110 /* Pull timing values out of registers */
5111 seq
->t1_t3
= (pp_on
& PANEL_POWER_UP_DELAY_MASK
) >>
5112 PANEL_POWER_UP_DELAY_SHIFT
;
5114 seq
->t8
= (pp_on
& PANEL_LIGHT_ON_DELAY_MASK
) >>
5115 PANEL_LIGHT_ON_DELAY_SHIFT
;
5117 seq
->t9
= (pp_off
& PANEL_LIGHT_OFF_DELAY_MASK
) >>
5118 PANEL_LIGHT_OFF_DELAY_SHIFT
;
5120 seq
->t10
= (pp_off
& PANEL_POWER_DOWN_DELAY_MASK
) >>
5121 PANEL_POWER_DOWN_DELAY_SHIFT
;
5123 if (IS_GEN9_LP(dev_priv
) || HAS_PCH_CNP(dev_priv
)) {
5124 u16 tmp
= (pp_ctl
& BXT_POWER_CYCLE_DELAY_MASK
) >>
5125 BXT_POWER_CYCLE_DELAY_SHIFT
;
5127 seq
->t11_t12
= (tmp
- 1) * 1000;
5131 seq
->t11_t12
= ((pp_div
& PANEL_POWER_CYCLE_DELAY_MASK
) >>
5132 PANEL_POWER_CYCLE_DELAY_SHIFT
) * 1000;
5137 intel_pps_dump_state(const char *state_name
, const struct edp_power_seq
*seq
)
5139 DRM_DEBUG_KMS("%s t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n",
5141 seq
->t1_t3
, seq
->t8
, seq
->t9
, seq
->t10
, seq
->t11_t12
);
5145 intel_pps_verify_state(struct drm_i915_private
*dev_priv
,
5146 struct intel_dp
*intel_dp
)
5148 struct edp_power_seq hw
;
5149 struct edp_power_seq
*sw
= &intel_dp
->pps_delays
;
5151 intel_pps_readout_hw_state(dev_priv
, intel_dp
, &hw
);
5153 if (hw
.t1_t3
!= sw
->t1_t3
|| hw
.t8
!= sw
->t8
|| hw
.t9
!= sw
->t9
||
5154 hw
.t10
!= sw
->t10
|| hw
.t11_t12
!= sw
->t11_t12
) {
5155 DRM_ERROR("PPS state mismatch\n");
5156 intel_pps_dump_state("sw", sw
);
5157 intel_pps_dump_state("hw", &hw
);
5162 intel_dp_init_panel_power_sequencer(struct drm_device
*dev
,
5163 struct intel_dp
*intel_dp
)
5165 struct drm_i915_private
*dev_priv
= to_i915(dev
);
5166 struct edp_power_seq cur
, vbt
, spec
,
5167 *final
= &intel_dp
->pps_delays
;
5169 lockdep_assert_held(&dev_priv
->pps_mutex
);
5171 /* already initialized? */
5172 if (final
->t11_t12
!= 0)
5175 intel_pps_readout_hw_state(dev_priv
, intel_dp
, &cur
);
5177 intel_pps_dump_state("cur", &cur
);
5179 vbt
= dev_priv
->vbt
.edp
.pps
;
5181 /* Upper limits from eDP 1.3 spec. Note that we use the clunky units of
5182 * our hw here, which are all in 100usec. */
5183 spec
.t1_t3
= 210 * 10;
5184 spec
.t8
= 50 * 10; /* no limit for t8, use t7 instead */
5185 spec
.t9
= 50 * 10; /* no limit for t9, make it symmetric with t8 */
5186 spec
.t10
= 500 * 10;
5187 /* This one is special and actually in units of 100ms, but zero
5188 * based in the hw (so we need to add 100 ms). But the sw vbt
5189 * table multiplies it with 1000 to make it in units of 100usec,
5191 spec
.t11_t12
= (510 + 100) * 10;
5193 intel_pps_dump_state("vbt", &vbt
);
5195 /* Use the max of the register settings and vbt. If both are
5196 * unset, fall back to the spec limits. */
5197 #define assign_final(field) final->field = (max(cur.field, vbt.field) == 0 ? \
5199 max(cur.field, vbt.field))
5200 assign_final(t1_t3
);
5204 assign_final(t11_t12
);
5207 #define get_delay(field) (DIV_ROUND_UP(final->field, 10))
5208 intel_dp
->panel_power_up_delay
= get_delay(t1_t3
);
5209 intel_dp
->backlight_on_delay
= get_delay(t8
);
5210 intel_dp
->backlight_off_delay
= get_delay(t9
);
5211 intel_dp
->panel_power_down_delay
= get_delay(t10
);
5212 intel_dp
->panel_power_cycle_delay
= get_delay(t11_t12
);
5215 DRM_DEBUG_KMS("panel power up delay %d, power down delay %d, power cycle delay %d\n",
5216 intel_dp
->panel_power_up_delay
, intel_dp
->panel_power_down_delay
,
5217 intel_dp
->panel_power_cycle_delay
);
5219 DRM_DEBUG_KMS("backlight on delay %d, off delay %d\n",
5220 intel_dp
->backlight_on_delay
, intel_dp
->backlight_off_delay
);
5223 * We override the HW backlight delays to 1 because we do manual waits
5224 * on them. For T8, even BSpec recommends doing it. For T9, if we
5225 * don't do this, we'll end up waiting for the backlight off delay
5226 * twice: once when we do the manual sleep, and once when we disable
5227 * the panel and wait for the PP_STATUS bit to become zero.
5234 intel_dp_init_panel_power_sequencer_registers(struct drm_device
*dev
,
5235 struct intel_dp
*intel_dp
,
5236 bool force_disable_vdd
)
5238 struct drm_i915_private
*dev_priv
= to_i915(dev
);
5239 u32 pp_on
, pp_off
, pp_div
, port_sel
= 0;
5240 int div
= dev_priv
->rawclk_freq
/ 1000;
5241 struct pps_registers regs
;
5242 enum port port
= dp_to_dig_port(intel_dp
)->port
;
5243 const struct edp_power_seq
*seq
= &intel_dp
->pps_delays
;
5245 lockdep_assert_held(&dev_priv
->pps_mutex
);
5247 intel_pps_get_registers(dev_priv
, intel_dp
, ®s
);
5250 * On some VLV machines the BIOS can leave the VDD
5251 * enabled even on power seqeuencers which aren't
5252 * hooked up to any port. This would mess up the
5253 * power domain tracking the first time we pick
5254 * one of these power sequencers for use since
5255 * edp_panel_vdd_on() would notice that the VDD was
5256 * already on and therefore wouldn't grab the power
5257 * domain reference. Disable VDD first to avoid this.
5258 * This also avoids spuriously turning the VDD on as
5259 * soon as the new power seqeuencer gets initialized.
5261 if (force_disable_vdd
) {
5262 u32 pp
= ironlake_get_pp_control(intel_dp
);
5264 WARN(pp
& PANEL_POWER_ON
, "Panel power already on\n");
5266 if (pp
& EDP_FORCE_VDD
)
5267 DRM_DEBUG_KMS("VDD already on, disabling first\n");
5269 pp
&= ~EDP_FORCE_VDD
;
5271 I915_WRITE(regs
.pp_ctrl
, pp
);
5274 pp_on
= (seq
->t1_t3
<< PANEL_POWER_UP_DELAY_SHIFT
) |
5275 (seq
->t8
<< PANEL_LIGHT_ON_DELAY_SHIFT
);
5276 pp_off
= (seq
->t9
<< PANEL_LIGHT_OFF_DELAY_SHIFT
) |
5277 (seq
->t10
<< PANEL_POWER_DOWN_DELAY_SHIFT
);
5278 /* Compute the divisor for the pp clock, simply match the Bspec
5280 if (IS_GEN9_LP(dev_priv
) || HAS_PCH_CNP(dev_priv
)) {
5281 pp_div
= I915_READ(regs
.pp_ctrl
);
5282 pp_div
&= ~BXT_POWER_CYCLE_DELAY_MASK
;
5283 pp_div
|= (DIV_ROUND_UP((seq
->t11_t12
+ 1), 1000)
5284 << BXT_POWER_CYCLE_DELAY_SHIFT
);
5286 pp_div
= ((100 * div
)/2 - 1) << PP_REFERENCE_DIVIDER_SHIFT
;
5287 pp_div
|= (DIV_ROUND_UP(seq
->t11_t12
, 1000)
5288 << PANEL_POWER_CYCLE_DELAY_SHIFT
);
5291 /* Haswell doesn't have any port selection bits for the panel
5292 * power sequencer any more. */
5293 if (IS_VALLEYVIEW(dev_priv
) || IS_CHERRYVIEW(dev_priv
)) {
5294 port_sel
= PANEL_PORT_SELECT_VLV(port
);
5295 } else if (HAS_PCH_IBX(dev_priv
) || HAS_PCH_CPT(dev_priv
)) {
5297 port_sel
= PANEL_PORT_SELECT_DPA
;
5299 port_sel
= PANEL_PORT_SELECT_DPD
;
5304 I915_WRITE(regs
.pp_on
, pp_on
);
5305 I915_WRITE(regs
.pp_off
, pp_off
);
5306 if (IS_GEN9_LP(dev_priv
) || HAS_PCH_CNP(dev_priv
))
5307 I915_WRITE(regs
.pp_ctrl
, pp_div
);
5309 I915_WRITE(regs
.pp_div
, pp_div
);
5311 DRM_DEBUG_KMS("panel power sequencer register settings: PP_ON %#x, PP_OFF %#x, PP_DIV %#x\n",
5312 I915_READ(regs
.pp_on
),
5313 I915_READ(regs
.pp_off
),
5314 (IS_GEN9_LP(dev_priv
) || HAS_PCH_CNP(dev_priv
)) ?
5315 (I915_READ(regs
.pp_ctrl
) & BXT_POWER_CYCLE_DELAY_MASK
) :
5316 I915_READ(regs
.pp_div
));
5319 static void intel_dp_pps_init(struct drm_device
*dev
,
5320 struct intel_dp
*intel_dp
)
5322 struct drm_i915_private
*dev_priv
= to_i915(dev
);
5324 if (IS_VALLEYVIEW(dev_priv
) || IS_CHERRYVIEW(dev_priv
)) {
5325 vlv_initial_power_sequencer_setup(intel_dp
);
5327 intel_dp_init_panel_power_sequencer(dev
, intel_dp
);
5328 intel_dp_init_panel_power_sequencer_registers(dev
, intel_dp
, false);
5333 * intel_dp_set_drrs_state - program registers for RR switch to take effect
5334 * @dev_priv: i915 device
5335 * @crtc_state: a pointer to the active intel_crtc_state
5336 * @refresh_rate: RR to be programmed
5338 * This function gets called when refresh rate (RR) has to be changed from
5339 * one frequency to another. Switches can be between high and low RR
5340 * supported by the panel or to any other RR based on media playback (in
5341 * this case, RR value needs to be passed from user space).
5343 * The caller of this function needs to take a lock on dev_priv->drrs.
5345 static void intel_dp_set_drrs_state(struct drm_i915_private
*dev_priv
,
5346 struct intel_crtc_state
*crtc_state
,
5349 struct intel_encoder
*encoder
;
5350 struct intel_digital_port
*dig_port
= NULL
;
5351 struct intel_dp
*intel_dp
= dev_priv
->drrs
.dp
;
5352 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc_state
->base
.crtc
);
5353 enum drrs_refresh_rate_type index
= DRRS_HIGH_RR
;
5355 if (refresh_rate
<= 0) {
5356 DRM_DEBUG_KMS("Refresh rate should be positive non-zero.\n");
5360 if (intel_dp
== NULL
) {
5361 DRM_DEBUG_KMS("DRRS not supported.\n");
5366 * FIXME: This needs proper synchronization with psr state for some
5367 * platforms that cannot have PSR and DRRS enabled at the same time.
5370 dig_port
= dp_to_dig_port(intel_dp
);
5371 encoder
= &dig_port
->base
;
5372 intel_crtc
= to_intel_crtc(encoder
->base
.crtc
);
5375 DRM_DEBUG_KMS("DRRS: intel_crtc not initialized\n");
5379 if (dev_priv
->drrs
.type
< SEAMLESS_DRRS_SUPPORT
) {
5380 DRM_DEBUG_KMS("Only Seamless DRRS supported.\n");
5384 if (intel_dp
->attached_connector
->panel
.downclock_mode
->vrefresh
==
5386 index
= DRRS_LOW_RR
;
5388 if (index
== dev_priv
->drrs
.refresh_rate_type
) {
5390 "DRRS requested for previously set RR...ignoring\n");
5394 if (!crtc_state
->base
.active
) {
5395 DRM_DEBUG_KMS("eDP encoder disabled. CRTC not Active\n");
5399 if (INTEL_GEN(dev_priv
) >= 8 && !IS_CHERRYVIEW(dev_priv
)) {
5402 intel_dp_set_m_n(intel_crtc
, M1_N1
);
5405 intel_dp_set_m_n(intel_crtc
, M2_N2
);
5409 DRM_ERROR("Unsupported refreshrate type\n");
5411 } else if (INTEL_GEN(dev_priv
) > 6) {
5412 i915_reg_t reg
= PIPECONF(crtc_state
->cpu_transcoder
);
5415 val
= I915_READ(reg
);
5416 if (index
> DRRS_HIGH_RR
) {
5417 if (IS_VALLEYVIEW(dev_priv
) || IS_CHERRYVIEW(dev_priv
))
5418 val
|= PIPECONF_EDP_RR_MODE_SWITCH_VLV
;
5420 val
|= PIPECONF_EDP_RR_MODE_SWITCH
;
5422 if (IS_VALLEYVIEW(dev_priv
) || IS_CHERRYVIEW(dev_priv
))
5423 val
&= ~PIPECONF_EDP_RR_MODE_SWITCH_VLV
;
5425 val
&= ~PIPECONF_EDP_RR_MODE_SWITCH
;
5427 I915_WRITE(reg
, val
);
5430 dev_priv
->drrs
.refresh_rate_type
= index
;
5432 DRM_DEBUG_KMS("eDP Refresh Rate set to : %dHz\n", refresh_rate
);
5436 * intel_edp_drrs_enable - init drrs struct if supported
5437 * @intel_dp: DP struct
5438 * @crtc_state: A pointer to the active crtc state.
5440 * Initializes frontbuffer_bits and drrs.dp
5442 void intel_edp_drrs_enable(struct intel_dp
*intel_dp
,
5443 struct intel_crtc_state
*crtc_state
)
5445 struct drm_device
*dev
= intel_dp_to_dev(intel_dp
);
5446 struct drm_i915_private
*dev_priv
= to_i915(dev
);
5448 if (!crtc_state
->has_drrs
) {
5449 DRM_DEBUG_KMS("Panel doesn't support DRRS\n");
5453 mutex_lock(&dev_priv
->drrs
.mutex
);
5454 if (WARN_ON(dev_priv
->drrs
.dp
)) {
5455 DRM_ERROR("DRRS already enabled\n");
5459 dev_priv
->drrs
.busy_frontbuffer_bits
= 0;
5461 dev_priv
->drrs
.dp
= intel_dp
;
5464 mutex_unlock(&dev_priv
->drrs
.mutex
);
5468 * intel_edp_drrs_disable - Disable DRRS
5469 * @intel_dp: DP struct
5470 * @old_crtc_state: Pointer to old crtc_state.
5473 void intel_edp_drrs_disable(struct intel_dp
*intel_dp
,
5474 struct intel_crtc_state
*old_crtc_state
)
5476 struct drm_device
*dev
= intel_dp_to_dev(intel_dp
);
5477 struct drm_i915_private
*dev_priv
= to_i915(dev
);
5479 if (!old_crtc_state
->has_drrs
)
5482 mutex_lock(&dev_priv
->drrs
.mutex
);
5483 if (!dev_priv
->drrs
.dp
) {
5484 mutex_unlock(&dev_priv
->drrs
.mutex
);
5488 if (dev_priv
->drrs
.refresh_rate_type
== DRRS_LOW_RR
)
5489 intel_dp_set_drrs_state(dev_priv
, old_crtc_state
,
5490 intel_dp
->attached_connector
->panel
.fixed_mode
->vrefresh
);
5492 dev_priv
->drrs
.dp
= NULL
;
5493 mutex_unlock(&dev_priv
->drrs
.mutex
);
5495 cancel_delayed_work_sync(&dev_priv
->drrs
.work
);
5498 static void intel_edp_drrs_downclock_work(struct work_struct
*work
)
5500 struct drm_i915_private
*dev_priv
=
5501 container_of(work
, typeof(*dev_priv
), drrs
.work
.work
);
5502 struct intel_dp
*intel_dp
;
5504 mutex_lock(&dev_priv
->drrs
.mutex
);
5506 intel_dp
= dev_priv
->drrs
.dp
;
5512 * The delayed work can race with an invalidate hence we need to
5516 if (dev_priv
->drrs
.busy_frontbuffer_bits
)
5519 if (dev_priv
->drrs
.refresh_rate_type
!= DRRS_LOW_RR
) {
5520 struct drm_crtc
*crtc
= dp_to_dig_port(intel_dp
)->base
.base
.crtc
;
5522 intel_dp_set_drrs_state(dev_priv
, to_intel_crtc(crtc
)->config
,
5523 intel_dp
->attached_connector
->panel
.downclock_mode
->vrefresh
);
5527 mutex_unlock(&dev_priv
->drrs
.mutex
);
5531 * intel_edp_drrs_invalidate - Disable Idleness DRRS
5532 * @dev_priv: i915 device
5533 * @frontbuffer_bits: frontbuffer plane tracking bits
5535 * This function gets called everytime rendering on the given planes start.
5536 * Hence DRRS needs to be Upclocked, i.e. (LOW_RR -> HIGH_RR).
5538 * Dirty frontbuffers relevant to DRRS are tracked in busy_frontbuffer_bits.
5540 void intel_edp_drrs_invalidate(struct drm_i915_private
*dev_priv
,
5541 unsigned int frontbuffer_bits
)
5543 struct drm_crtc
*crtc
;
5546 if (dev_priv
->drrs
.type
== DRRS_NOT_SUPPORTED
)
5549 cancel_delayed_work(&dev_priv
->drrs
.work
);
5551 mutex_lock(&dev_priv
->drrs
.mutex
);
5552 if (!dev_priv
->drrs
.dp
) {
5553 mutex_unlock(&dev_priv
->drrs
.mutex
);
5557 crtc
= dp_to_dig_port(dev_priv
->drrs
.dp
)->base
.base
.crtc
;
5558 pipe
= to_intel_crtc(crtc
)->pipe
;
5560 frontbuffer_bits
&= INTEL_FRONTBUFFER_ALL_MASK(pipe
);
5561 dev_priv
->drrs
.busy_frontbuffer_bits
|= frontbuffer_bits
;
5563 /* invalidate means busy screen hence upclock */
5564 if (frontbuffer_bits
&& dev_priv
->drrs
.refresh_rate_type
== DRRS_LOW_RR
)
5565 intel_dp_set_drrs_state(dev_priv
, to_intel_crtc(crtc
)->config
,
5566 dev_priv
->drrs
.dp
->attached_connector
->panel
.fixed_mode
->vrefresh
);
5568 mutex_unlock(&dev_priv
->drrs
.mutex
);
5572 * intel_edp_drrs_flush - Restart Idleness DRRS
5573 * @dev_priv: i915 device
5574 * @frontbuffer_bits: frontbuffer plane tracking bits
5576 * This function gets called every time rendering on the given planes has
5577 * completed or flip on a crtc is completed. So DRRS should be upclocked
5578 * (LOW_RR -> HIGH_RR). And also Idleness detection should be started again,
5579 * if no other planes are dirty.
5581 * Dirty frontbuffers relevant to DRRS are tracked in busy_frontbuffer_bits.
5583 void intel_edp_drrs_flush(struct drm_i915_private
*dev_priv
,
5584 unsigned int frontbuffer_bits
)
5586 struct drm_crtc
*crtc
;
5589 if (dev_priv
->drrs
.type
== DRRS_NOT_SUPPORTED
)
5592 cancel_delayed_work(&dev_priv
->drrs
.work
);
5594 mutex_lock(&dev_priv
->drrs
.mutex
);
5595 if (!dev_priv
->drrs
.dp
) {
5596 mutex_unlock(&dev_priv
->drrs
.mutex
);
5600 crtc
= dp_to_dig_port(dev_priv
->drrs
.dp
)->base
.base
.crtc
;
5601 pipe
= to_intel_crtc(crtc
)->pipe
;
5603 frontbuffer_bits
&= INTEL_FRONTBUFFER_ALL_MASK(pipe
);
5604 dev_priv
->drrs
.busy_frontbuffer_bits
&= ~frontbuffer_bits
;
5606 /* flush means busy screen hence upclock */
5607 if (frontbuffer_bits
&& dev_priv
->drrs
.refresh_rate_type
== DRRS_LOW_RR
)
5608 intel_dp_set_drrs_state(dev_priv
, to_intel_crtc(crtc
)->config
,
5609 dev_priv
->drrs
.dp
->attached_connector
->panel
.fixed_mode
->vrefresh
);
5612 * flush also means no more activity hence schedule downclock, if all
5613 * other fbs are quiescent too
5615 if (!dev_priv
->drrs
.busy_frontbuffer_bits
)
5616 schedule_delayed_work(&dev_priv
->drrs
.work
,
5617 msecs_to_jiffies(1000));
5618 mutex_unlock(&dev_priv
->drrs
.mutex
);
5622 * DOC: Display Refresh Rate Switching (DRRS)
5624 * Display Refresh Rate Switching (DRRS) is a power conservation feature
5625 * which enables swtching between low and high refresh rates,
5626 * dynamically, based on the usage scenario. This feature is applicable
5627 * for internal panels.
5629 * Indication that the panel supports DRRS is given by the panel EDID, which
5630 * would list multiple refresh rates for one resolution.
5632 * DRRS is of 2 types - static and seamless.
5633 * Static DRRS involves changing refresh rate (RR) by doing a full modeset
5634 * (may appear as a blink on screen) and is used in dock-undock scenario.
5635 * Seamless DRRS involves changing RR without any visual effect to the user
5636 * and can be used during normal system usage. This is done by programming
5637 * certain registers.
5639 * Support for static/seamless DRRS may be indicated in the VBT based on
5640 * inputs from the panel spec.
5642 * DRRS saves power by switching to low RR based on usage scenarios.
5644 * The implementation is based on frontbuffer tracking implementation. When
5645 * there is a disturbance on the screen triggered by user activity or a periodic
5646 * system activity, DRRS is disabled (RR is changed to high RR). When there is
5647 * no movement on screen, after a timeout of 1 second, a switch to low RR is
5650 * For integration with frontbuffer tracking code, intel_edp_drrs_invalidate()
5651 * and intel_edp_drrs_flush() are called.
5653 * DRRS can be further extended to support other internal panels and also
5654 * the scenario of video playback wherein RR is set based on the rate
5655 * requested by userspace.
5659 * intel_dp_drrs_init - Init basic DRRS work and mutex.
5660 * @intel_connector: eDP connector
5661 * @fixed_mode: preferred mode of panel
5663 * This function is called only once at driver load to initialize basic
5667 * Downclock mode if panel supports it, else return NULL.
5668 * DRRS support is determined by the presence of downclock mode (apart
5669 * from VBT setting).
5671 static struct drm_display_mode
*
5672 intel_dp_drrs_init(struct intel_connector
*intel_connector
,
5673 struct drm_display_mode
*fixed_mode
)
5675 struct drm_connector
*connector
= &intel_connector
->base
;
5676 struct drm_device
*dev
= connector
->dev
;
5677 struct drm_i915_private
*dev_priv
= to_i915(dev
);
5678 struct drm_display_mode
*downclock_mode
= NULL
;
5680 INIT_DELAYED_WORK(&dev_priv
->drrs
.work
, intel_edp_drrs_downclock_work
);
5681 mutex_init(&dev_priv
->drrs
.mutex
);
5683 if (INTEL_GEN(dev_priv
) <= 6) {
5684 DRM_DEBUG_KMS("DRRS supported for Gen7 and above\n");
5688 if (dev_priv
->vbt
.drrs_type
!= SEAMLESS_DRRS_SUPPORT
) {
5689 DRM_DEBUG_KMS("VBT doesn't support DRRS\n");
5693 downclock_mode
= intel_find_panel_downclock
5694 (dev_priv
, fixed_mode
, connector
);
5696 if (!downclock_mode
) {
5697 DRM_DEBUG_KMS("Downclock mode is not found. DRRS not supported\n");
5701 dev_priv
->drrs
.type
= dev_priv
->vbt
.drrs_type
;
5703 dev_priv
->drrs
.refresh_rate_type
= DRRS_HIGH_RR
;
5704 DRM_DEBUG_KMS("seamless DRRS supported for eDP panel.\n");
5705 return downclock_mode
;
5708 static bool intel_edp_init_connector(struct intel_dp
*intel_dp
,
5709 struct intel_connector
*intel_connector
)
5711 struct drm_connector
*connector
= &intel_connector
->base
;
5712 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
5713 struct intel_encoder
*intel_encoder
= &intel_dig_port
->base
;
5714 struct drm_device
*dev
= intel_encoder
->base
.dev
;
5715 struct drm_i915_private
*dev_priv
= to_i915(dev
);
5716 struct drm_display_mode
*fixed_mode
= NULL
;
5717 struct drm_display_mode
*downclock_mode
= NULL
;
5719 struct drm_display_mode
*scan
;
5721 enum pipe pipe
= INVALID_PIPE
;
5723 if (!is_edp(intel_dp
))
5727 * On IBX/CPT we may get here with LVDS already registered. Since the
5728 * driver uses the only internal power sequencer available for both
5729 * eDP and LVDS bail out early in this case to prevent interfering
5730 * with an already powered-on LVDS power sequencer.
5732 if (intel_get_lvds_encoder(dev
)) {
5733 WARN_ON(!(HAS_PCH_IBX(dev_priv
) || HAS_PCH_CPT(dev_priv
)));
5734 DRM_INFO("LVDS was detected, not registering eDP\n");
5741 intel_dp_init_panel_power_timestamps(intel_dp
);
5742 intel_dp_pps_init(dev
, intel_dp
);
5743 intel_edp_panel_vdd_sanitize(intel_dp
);
5745 pps_unlock(intel_dp
);
5747 /* Cache DPCD and EDID for edp. */
5748 has_dpcd
= intel_edp_init_dpcd(intel_dp
);
5751 /* if this fails, presume the device is a ghost */
5752 DRM_INFO("failed to retrieve link info, disabling eDP\n");
5756 mutex_lock(&dev
->mode_config
.mutex
);
5757 edid
= drm_get_edid(connector
, &intel_dp
->aux
.ddc
);
5759 if (drm_add_edid_modes(connector
, edid
)) {
5760 drm_mode_connector_update_edid_property(connector
,
5762 drm_edid_to_eld(connector
, edid
);
5765 edid
= ERR_PTR(-EINVAL
);
5768 edid
= ERR_PTR(-ENOENT
);
5770 intel_connector
->edid
= edid
;
5772 /* prefer fixed mode from EDID if available */
5773 list_for_each_entry(scan
, &connector
->probed_modes
, head
) {
5774 if ((scan
->type
& DRM_MODE_TYPE_PREFERRED
)) {
5775 fixed_mode
= drm_mode_duplicate(dev
, scan
);
5776 downclock_mode
= intel_dp_drrs_init(
5777 intel_connector
, fixed_mode
);
5782 /* fallback to VBT if available for eDP */
5783 if (!fixed_mode
&& dev_priv
->vbt
.lfp_lvds_vbt_mode
) {
5784 fixed_mode
= drm_mode_duplicate(dev
,
5785 dev_priv
->vbt
.lfp_lvds_vbt_mode
);
5787 fixed_mode
->type
|= DRM_MODE_TYPE_PREFERRED
;
5788 connector
->display_info
.width_mm
= fixed_mode
->width_mm
;
5789 connector
->display_info
.height_mm
= fixed_mode
->height_mm
;
5792 mutex_unlock(&dev
->mode_config
.mutex
);
5794 if (IS_VALLEYVIEW(dev_priv
) || IS_CHERRYVIEW(dev_priv
)) {
5795 intel_dp
->edp_notifier
.notifier_call
= edp_notify_handler
;
5796 register_reboot_notifier(&intel_dp
->edp_notifier
);
5799 * Figure out the current pipe for the initial backlight setup.
5800 * If the current pipe isn't valid, try the PPS pipe, and if that
5801 * fails just assume pipe A.
5803 pipe
= vlv_active_pipe(intel_dp
);
5805 if (pipe
!= PIPE_A
&& pipe
!= PIPE_B
)
5806 pipe
= intel_dp
->pps_pipe
;
5808 if (pipe
!= PIPE_A
&& pipe
!= PIPE_B
)
5811 DRM_DEBUG_KMS("using pipe %c for initial backlight setup\n",
5815 intel_panel_init(&intel_connector
->panel
, fixed_mode
, downclock_mode
);
5816 intel_connector
->panel
.backlight
.power
= intel_edp_backlight_power
;
5817 intel_panel_setup_backlight(connector
, pipe
);
5822 cancel_delayed_work_sync(&intel_dp
->panel_vdd_work
);
5824 * vdd might still be enabled do to the delayed vdd off.
5825 * Make sure vdd is actually turned off here.
5828 edp_panel_vdd_off_sync(intel_dp
);
5829 pps_unlock(intel_dp
);
5834 /* Set up the hotplug pin and aux power domain. */
5836 intel_dp_init_connector_port_info(struct intel_digital_port
*intel_dig_port
)
5838 struct intel_encoder
*encoder
= &intel_dig_port
->base
;
5839 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
5841 switch (intel_dig_port
->port
) {
5843 encoder
->hpd_pin
= HPD_PORT_A
;
5844 intel_dp
->aux_power_domain
= POWER_DOMAIN_AUX_A
;
5847 encoder
->hpd_pin
= HPD_PORT_B
;
5848 intel_dp
->aux_power_domain
= POWER_DOMAIN_AUX_B
;
5851 encoder
->hpd_pin
= HPD_PORT_C
;
5852 intel_dp
->aux_power_domain
= POWER_DOMAIN_AUX_C
;
5855 encoder
->hpd_pin
= HPD_PORT_D
;
5856 intel_dp
->aux_power_domain
= POWER_DOMAIN_AUX_D
;
5859 encoder
->hpd_pin
= HPD_PORT_E
;
5861 /* FIXME: Check VBT for actual wiring of PORT E */
5862 intel_dp
->aux_power_domain
= POWER_DOMAIN_AUX_D
;
5865 MISSING_CASE(intel_dig_port
->port
);
5869 static void intel_dp_modeset_retry_work_fn(struct work_struct
*work
)
5871 struct intel_connector
*intel_connector
;
5872 struct drm_connector
*connector
;
5874 intel_connector
= container_of(work
, typeof(*intel_connector
),
5875 modeset_retry_work
);
5876 connector
= &intel_connector
->base
;
5877 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector
->base
.id
,
5880 /* Grab the locks before changing connector property*/
5881 mutex_lock(&connector
->dev
->mode_config
.mutex
);
5882 /* Set connector link status to BAD and send a Uevent to notify
5883 * userspace to do a modeset.
5885 drm_mode_connector_set_link_status_property(connector
,
5886 DRM_MODE_LINK_STATUS_BAD
);
5887 mutex_unlock(&connector
->dev
->mode_config
.mutex
);
5888 /* Send Hotplug uevent so userspace can reprobe */
5889 drm_kms_helper_hotplug_event(connector
->dev
);
5893 intel_dp_init_connector(struct intel_digital_port
*intel_dig_port
,
5894 struct intel_connector
*intel_connector
)
5896 struct drm_connector
*connector
= &intel_connector
->base
;
5897 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
5898 struct intel_encoder
*intel_encoder
= &intel_dig_port
->base
;
5899 struct drm_device
*dev
= intel_encoder
->base
.dev
;
5900 struct drm_i915_private
*dev_priv
= to_i915(dev
);
5901 enum port port
= intel_dig_port
->port
;
5904 /* Initialize the work for modeset in case of link train failure */
5905 INIT_WORK(&intel_connector
->modeset_retry_work
,
5906 intel_dp_modeset_retry_work_fn
);
5908 if (WARN(intel_dig_port
->max_lanes
< 1,
5909 "Not enough lanes (%d) for DP on port %c\n",
5910 intel_dig_port
->max_lanes
, port_name(port
)))
5913 intel_dp_set_source_rates(intel_dp
);
5915 intel_dp
->reset_link_params
= true;
5916 intel_dp
->pps_pipe
= INVALID_PIPE
;
5917 intel_dp
->active_pipe
= INVALID_PIPE
;
5919 /* intel_dp vfuncs */
5920 if (INTEL_GEN(dev_priv
) >= 9)
5921 intel_dp
->get_aux_clock_divider
= skl_get_aux_clock_divider
;
5922 else if (IS_HASWELL(dev_priv
) || IS_BROADWELL(dev_priv
))
5923 intel_dp
->get_aux_clock_divider
= hsw_get_aux_clock_divider
;
5924 else if (HAS_PCH_SPLIT(dev_priv
))
5925 intel_dp
->get_aux_clock_divider
= ilk_get_aux_clock_divider
;
5927 intel_dp
->get_aux_clock_divider
= g4x_get_aux_clock_divider
;
5929 if (INTEL_GEN(dev_priv
) >= 9)
5930 intel_dp
->get_aux_send_ctl
= skl_get_aux_send_ctl
;
5932 intel_dp
->get_aux_send_ctl
= g4x_get_aux_send_ctl
;
5934 if (HAS_DDI(dev_priv
))
5935 intel_dp
->prepare_link_retrain
= intel_ddi_prepare_link_retrain
;
5937 /* Preserve the current hw state. */
5938 intel_dp
->DP
= I915_READ(intel_dp
->output_reg
);
5939 intel_dp
->attached_connector
= intel_connector
;
5941 if (intel_dp_is_edp(dev_priv
, port
))
5942 type
= DRM_MODE_CONNECTOR_eDP
;
5944 type
= DRM_MODE_CONNECTOR_DisplayPort
;
5946 if (IS_VALLEYVIEW(dev_priv
) || IS_CHERRYVIEW(dev_priv
))
5947 intel_dp
->active_pipe
= vlv_active_pipe(intel_dp
);
5950 * For eDP we always set the encoder type to INTEL_OUTPUT_EDP, but
5951 * for DP the encoder type can be set by the caller to
5952 * INTEL_OUTPUT_UNKNOWN for DDI, so don't rewrite it.
5954 if (type
== DRM_MODE_CONNECTOR_eDP
)
5955 intel_encoder
->type
= INTEL_OUTPUT_EDP
;
5957 /* eDP only on port B and/or C on vlv/chv */
5958 if (WARN_ON((IS_VALLEYVIEW(dev_priv
) || IS_CHERRYVIEW(dev_priv
)) &&
5959 is_edp(intel_dp
) && port
!= PORT_B
&& port
!= PORT_C
))
5962 DRM_DEBUG_KMS("Adding %s connector on port %c\n",
5963 type
== DRM_MODE_CONNECTOR_eDP
? "eDP" : "DP",
5966 drm_connector_init(dev
, connector
, &intel_dp_connector_funcs
, type
);
5967 drm_connector_helper_add(connector
, &intel_dp_connector_helper_funcs
);
5969 connector
->interlace_allowed
= true;
5970 connector
->doublescan_allowed
= 0;
5972 intel_dp_init_connector_port_info(intel_dig_port
);
5974 intel_dp_aux_init(intel_dp
);
5976 INIT_DELAYED_WORK(&intel_dp
->panel_vdd_work
,
5977 edp_panel_vdd_work
);
5979 intel_connector_attach_encoder(intel_connector
, intel_encoder
);
5981 if (HAS_DDI(dev_priv
))
5982 intel_connector
->get_hw_state
= intel_ddi_connector_get_hw_state
;
5984 intel_connector
->get_hw_state
= intel_connector_get_hw_state
;
5986 /* init MST on ports that can support it */
5987 if (HAS_DP_MST(dev_priv
) && !is_edp(intel_dp
) &&
5988 (port
== PORT_B
|| port
== PORT_C
|| port
== PORT_D
))
5989 intel_dp_mst_encoder_init(intel_dig_port
,
5990 intel_connector
->base
.base
.id
);
5992 if (!intel_edp_init_connector(intel_dp
, intel_connector
)) {
5993 intel_dp_aux_fini(intel_dp
);
5994 intel_dp_mst_encoder_cleanup(intel_dig_port
);
5998 intel_dp_add_properties(intel_dp
, connector
);
6000 /* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written
6001 * 0xd. Failure to do so will result in spurious interrupts being
6002 * generated on the port when a cable is not attached.
6004 if (IS_G4X(dev_priv
) && !IS_GM45(dev_priv
)) {
6005 u32 temp
= I915_READ(PEG_BAND_GAP_DATA
);
6006 I915_WRITE(PEG_BAND_GAP_DATA
, (temp
& ~0xf) | 0xd);
6012 drm_connector_cleanup(connector
);
6017 bool intel_dp_init(struct drm_i915_private
*dev_priv
,
6018 i915_reg_t output_reg
,
6021 struct intel_digital_port
*intel_dig_port
;
6022 struct intel_encoder
*intel_encoder
;
6023 struct drm_encoder
*encoder
;
6024 struct intel_connector
*intel_connector
;
6026 intel_dig_port
= kzalloc(sizeof(*intel_dig_port
), GFP_KERNEL
);
6027 if (!intel_dig_port
)
6030 intel_connector
= intel_connector_alloc();
6031 if (!intel_connector
)
6032 goto err_connector_alloc
;
6034 intel_encoder
= &intel_dig_port
->base
;
6035 encoder
= &intel_encoder
->base
;
6037 if (drm_encoder_init(&dev_priv
->drm
, &intel_encoder
->base
,
6038 &intel_dp_enc_funcs
, DRM_MODE_ENCODER_TMDS
,
6039 "DP %c", port_name(port
)))
6040 goto err_encoder_init
;
6042 intel_encoder
->compute_config
= intel_dp_compute_config
;
6043 intel_encoder
->disable
= intel_disable_dp
;
6044 intel_encoder
->get_hw_state
= intel_dp_get_hw_state
;
6045 intel_encoder
->get_config
= intel_dp_get_config
;
6046 intel_encoder
->suspend
= intel_dp_encoder_suspend
;
6047 if (IS_CHERRYVIEW(dev_priv
)) {
6048 intel_encoder
->pre_pll_enable
= chv_dp_pre_pll_enable
;
6049 intel_encoder
->pre_enable
= chv_pre_enable_dp
;
6050 intel_encoder
->enable
= vlv_enable_dp
;
6051 intel_encoder
->post_disable
= chv_post_disable_dp
;
6052 intel_encoder
->post_pll_disable
= chv_dp_post_pll_disable
;
6053 } else if (IS_VALLEYVIEW(dev_priv
)) {
6054 intel_encoder
->pre_pll_enable
= vlv_dp_pre_pll_enable
;
6055 intel_encoder
->pre_enable
= vlv_pre_enable_dp
;
6056 intel_encoder
->enable
= vlv_enable_dp
;
6057 intel_encoder
->post_disable
= vlv_post_disable_dp
;
6059 intel_encoder
->pre_enable
= g4x_pre_enable_dp
;
6060 intel_encoder
->enable
= g4x_enable_dp
;
6061 if (INTEL_GEN(dev_priv
) >= 5)
6062 intel_encoder
->post_disable
= ilk_post_disable_dp
;
6065 intel_dig_port
->port
= port
;
6066 intel_dig_port
->dp
.output_reg
= output_reg
;
6067 intel_dig_port
->max_lanes
= 4;
6069 intel_encoder
->type
= INTEL_OUTPUT_DP
;
6070 intel_encoder
->power_domain
= intel_port_to_power_domain(port
);
6071 if (IS_CHERRYVIEW(dev_priv
)) {
6073 intel_encoder
->crtc_mask
= 1 << 2;
6075 intel_encoder
->crtc_mask
= (1 << 0) | (1 << 1);
6077 intel_encoder
->crtc_mask
= (1 << 0) | (1 << 1) | (1 << 2);
6079 intel_encoder
->cloneable
= 0;
6080 intel_encoder
->port
= port
;
6082 intel_dig_port
->hpd_pulse
= intel_dp_hpd_pulse
;
6083 dev_priv
->hotplug
.irq_port
[port
] = intel_dig_port
;
6085 if (!intel_dp_init_connector(intel_dig_port
, intel_connector
))
6086 goto err_init_connector
;
6091 drm_encoder_cleanup(encoder
);
6093 kfree(intel_connector
);
6094 err_connector_alloc
:
6095 kfree(intel_dig_port
);
6099 void intel_dp_mst_suspend(struct drm_device
*dev
)
6101 struct drm_i915_private
*dev_priv
= to_i915(dev
);
6105 for (i
= 0; i
< I915_MAX_PORTS
; i
++) {
6106 struct intel_digital_port
*intel_dig_port
= dev_priv
->hotplug
.irq_port
[i
];
6108 if (!intel_dig_port
|| !intel_dig_port
->dp
.can_mst
)
6111 if (intel_dig_port
->dp
.is_mst
)
6112 drm_dp_mst_topology_mgr_suspend(&intel_dig_port
->dp
.mst_mgr
);
6116 void intel_dp_mst_resume(struct drm_device
*dev
)
6118 struct drm_i915_private
*dev_priv
= to_i915(dev
);
6121 for (i
= 0; i
< I915_MAX_PORTS
; i
++) {
6122 struct intel_digital_port
*intel_dig_port
= dev_priv
->hotplug
.irq_port
[i
];
6125 if (!intel_dig_port
|| !intel_dig_port
->dp
.can_mst
)
6128 ret
= drm_dp_mst_topology_mgr_resume(&intel_dig_port
->dp
.mst_mgr
);
6130 intel_dp_check_mst_status(&intel_dig_port
->dp
);