2 * Copyright © 2008 Intel Corporation
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
28 #include "intel_drv.h"
29 #include <drm/drm_atomic_helper.h>
30 #include <drm/drm_crtc_helper.h>
31 #include <drm/drm_edid.h>
33 static bool intel_dp_mst_compute_config(struct intel_encoder
*encoder
,
34 struct intel_crtc_state
*pipe_config
,
35 struct drm_connector_state
*conn_state
)
37 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
38 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
39 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
40 struct intel_connector
*connector
=
41 to_intel_connector(conn_state
->connector
);
42 struct drm_atomic_state
*state
;
44 int lane_count
, slots
;
45 const struct drm_display_mode
*adjusted_mode
= &pipe_config
->base
.adjusted_mode
;
48 pipe_config
->has_pch_encoder
= false;
51 * for MST we always configure max link bw - the spec doesn't
52 * seem to suggest we should do otherwise.
54 lane_count
= drm_dp_max_lane_count(intel_dp
->dpcd
);
56 pipe_config
->lane_count
= lane_count
;
58 pipe_config
->pipe_bpp
= 24;
59 pipe_config
->port_clock
= intel_dp_max_link_rate(intel_dp
);
61 state
= pipe_config
->base
.state
;
63 if (drm_dp_mst_port_has_audio(&intel_dp
->mst_mgr
, connector
->port
))
64 pipe_config
->has_audio
= true;
65 mst_pbn
= drm_dp_calc_pbn_mode(adjusted_mode
->crtc_clock
, bpp
);
67 pipe_config
->pbn
= mst_pbn
;
68 slots
= drm_dp_find_vcpi_slots(&intel_dp
->mst_mgr
, mst_pbn
);
70 intel_link_compute_m_n(bpp
, lane_count
,
71 adjusted_mode
->crtc_clock
,
72 pipe_config
->port_clock
,
73 &pipe_config
->dp_m_n
);
75 pipe_config
->dp_m_n
.tu
= slots
;
81 static void intel_mst_disable_dp(struct intel_encoder
*encoder
,
82 struct intel_crtc_state
*old_crtc_state
,
83 struct drm_connector_state
*old_conn_state
)
85 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
86 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
87 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
88 struct intel_connector
*connector
=
89 to_intel_connector(old_conn_state
->connector
);
90 struct drm_i915_private
*dev_priv
= to_i915(encoder
->base
.dev
);
93 DRM_DEBUG_KMS("%d\n", intel_dp
->active_mst_links
);
95 drm_dp_mst_reset_vcpi_slots(&intel_dp
->mst_mgr
, connector
->port
);
97 ret
= drm_dp_update_payload_part1(&intel_dp
->mst_mgr
);
99 DRM_ERROR("failed to update payload %d\n", ret
);
101 if (old_crtc_state
->has_audio
) {
102 intel_audio_codec_disable(encoder
);
103 intel_display_power_put(dev_priv
, POWER_DOMAIN_AUDIO
);
107 static void intel_mst_post_disable_dp(struct intel_encoder
*encoder
,
108 struct intel_crtc_state
*old_crtc_state
,
109 struct drm_connector_state
*old_conn_state
)
111 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
112 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
113 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
114 struct intel_connector
*connector
=
115 to_intel_connector(old_conn_state
->connector
);
117 DRM_DEBUG_KMS("%d\n", intel_dp
->active_mst_links
);
120 drm_dp_check_act_status(&intel_dp
->mst_mgr
);
121 /* and this can also fail */
122 drm_dp_update_payload_part2(&intel_dp
->mst_mgr
);
124 drm_dp_mst_deallocate_vcpi(&intel_dp
->mst_mgr
, connector
->port
);
126 intel_dp
->active_mst_links
--;
128 intel_mst
->connector
= NULL
;
129 if (intel_dp
->active_mst_links
== 0) {
130 intel_dig_port
->base
.post_disable(&intel_dig_port
->base
,
133 intel_dp_sink_dpms(intel_dp
, DRM_MODE_DPMS_OFF
);
137 static void intel_mst_pre_enable_dp(struct intel_encoder
*encoder
,
138 struct intel_crtc_state
*pipe_config
,
139 struct drm_connector_state
*conn_state
)
141 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
142 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
143 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
144 struct drm_i915_private
*dev_priv
= to_i915(encoder
->base
.dev
);
145 enum port port
= intel_dig_port
->port
;
146 struct intel_connector
*connector
=
147 to_intel_connector(conn_state
->connector
);
152 /* MST encoders are bound to a crtc, not to a connector,
153 * force the mapping here for get_hw_state.
155 connector
->encoder
= encoder
;
156 intel_mst
->connector
= connector
;
158 DRM_DEBUG_KMS("%d\n", intel_dp
->active_mst_links
);
160 if (intel_dp
->active_mst_links
== 0) {
161 intel_ddi_clk_select(&intel_dig_port
->base
,
162 pipe_config
->shared_dpll
);
164 intel_prepare_dp_ddi_buffers(&intel_dig_port
->base
);
165 intel_dp_set_link_params(intel_dp
,
166 pipe_config
->port_clock
,
167 pipe_config
->lane_count
,
170 intel_ddi_init_dp_buf_reg(&intel_dig_port
->base
);
172 intel_dp_sink_dpms(intel_dp
, DRM_MODE_DPMS_ON
);
174 intel_dp_start_link_train(intel_dp
);
175 intel_dp_stop_link_train(intel_dp
);
178 ret
= drm_dp_mst_allocate_vcpi(&intel_dp
->mst_mgr
,
180 pipe_config
->pbn
, &slots
);
182 DRM_ERROR("failed to allocate vcpi\n");
187 intel_dp
->active_mst_links
++;
188 temp
= I915_READ(DP_TP_STATUS(port
));
189 I915_WRITE(DP_TP_STATUS(port
), temp
);
191 ret
= drm_dp_update_payload_part1(&intel_dp
->mst_mgr
);
194 static void intel_mst_enable_dp(struct intel_encoder
*encoder
,
195 struct intel_crtc_state
*pipe_config
,
196 struct drm_connector_state
*conn_state
)
198 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
199 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
200 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
201 struct drm_i915_private
*dev_priv
= to_i915(encoder
->base
.dev
);
202 enum port port
= intel_dig_port
->port
;
205 DRM_DEBUG_KMS("%d\n", intel_dp
->active_mst_links
);
207 if (intel_wait_for_register(dev_priv
,
209 DP_TP_STATUS_ACT_SENT
,
210 DP_TP_STATUS_ACT_SENT
,
212 DRM_ERROR("Timed out waiting for ACT sent\n");
214 ret
= drm_dp_check_act_status(&intel_dp
->mst_mgr
);
216 ret
= drm_dp_update_payload_part2(&intel_dp
->mst_mgr
);
217 if (pipe_config
->has_audio
) {
218 intel_display_power_get(dev_priv
, POWER_DOMAIN_AUDIO
);
219 intel_audio_codec_enable(encoder
, pipe_config
, conn_state
);
223 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder
*encoder
,
226 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
227 *pipe
= intel_mst
->pipe
;
228 if (intel_mst
->connector
)
233 static void intel_dp_mst_enc_get_config(struct intel_encoder
*encoder
,
234 struct intel_crtc_state
*pipe_config
)
236 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
237 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
238 struct intel_crtc
*crtc
= to_intel_crtc(pipe_config
->base
.crtc
);
239 struct drm_i915_private
*dev_priv
= to_i915(encoder
->base
.dev
);
240 enum transcoder cpu_transcoder
= pipe_config
->cpu_transcoder
;
243 pipe_config
->has_audio
=
244 intel_ddi_is_audio_enabled(dev_priv
, crtc
);
246 temp
= I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder
));
247 if (temp
& TRANS_DDI_PHSYNC
)
248 flags
|= DRM_MODE_FLAG_PHSYNC
;
250 flags
|= DRM_MODE_FLAG_NHSYNC
;
251 if (temp
& TRANS_DDI_PVSYNC
)
252 flags
|= DRM_MODE_FLAG_PVSYNC
;
254 flags
|= DRM_MODE_FLAG_NVSYNC
;
256 switch (temp
& TRANS_DDI_BPC_MASK
) {
257 case TRANS_DDI_BPC_6
:
258 pipe_config
->pipe_bpp
= 18;
260 case TRANS_DDI_BPC_8
:
261 pipe_config
->pipe_bpp
= 24;
263 case TRANS_DDI_BPC_10
:
264 pipe_config
->pipe_bpp
= 30;
266 case TRANS_DDI_BPC_12
:
267 pipe_config
->pipe_bpp
= 36;
272 pipe_config
->base
.adjusted_mode
.flags
|= flags
;
274 pipe_config
->lane_count
=
275 ((temp
& DDI_PORT_WIDTH_MASK
) >> DDI_PORT_WIDTH_SHIFT
) + 1;
277 intel_dp_get_m_n(crtc
, pipe_config
);
279 intel_ddi_clock_get(&intel_dig_port
->base
, pipe_config
);
282 static int intel_dp_mst_get_ddc_modes(struct drm_connector
*connector
)
284 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
285 struct intel_dp
*intel_dp
= intel_connector
->mst_port
;
290 return intel_connector_update_modes(connector
, NULL
);
293 edid
= drm_dp_mst_get_edid(connector
, &intel_dp
->mst_mgr
, intel_connector
->port
);
294 ret
= intel_connector_update_modes(connector
, edid
);
300 static enum drm_connector_status
301 intel_dp_mst_detect(struct drm_connector
*connector
, bool force
)
303 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
304 struct intel_dp
*intel_dp
= intel_connector
->mst_port
;
307 return connector_status_disconnected
;
308 return drm_dp_mst_detect_port(connector
, &intel_dp
->mst_mgr
, intel_connector
->port
);
312 intel_dp_mst_set_property(struct drm_connector
*connector
,
313 struct drm_property
*property
,
320 intel_dp_mst_connector_destroy(struct drm_connector
*connector
)
322 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
324 if (!IS_ERR_OR_NULL(intel_connector
->edid
))
325 kfree(intel_connector
->edid
);
327 drm_connector_cleanup(connector
);
331 static const struct drm_connector_funcs intel_dp_mst_connector_funcs
= {
332 .dpms
= drm_atomic_helper_connector_dpms
,
333 .detect
= intel_dp_mst_detect
,
334 .fill_modes
= drm_helper_probe_single_connector_modes
,
335 .set_property
= intel_dp_mst_set_property
,
336 .atomic_get_property
= intel_connector_atomic_get_property
,
337 .late_register
= intel_connector_register
,
338 .early_unregister
= intel_connector_unregister
,
339 .destroy
= intel_dp_mst_connector_destroy
,
340 .atomic_destroy_state
= drm_atomic_helper_connector_destroy_state
,
341 .atomic_duplicate_state
= drm_atomic_helper_connector_duplicate_state
,
344 static int intel_dp_mst_get_modes(struct drm_connector
*connector
)
346 return intel_dp_mst_get_ddc_modes(connector
);
349 static enum drm_mode_status
350 intel_dp_mst_mode_valid(struct drm_connector
*connector
,
351 struct drm_display_mode
*mode
)
353 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
354 struct intel_dp
*intel_dp
= intel_connector
->mst_port
;
355 int max_dotclk
= to_i915(connector
->dev
)->max_dotclk_freq
;
356 int bpp
= 24; /* MST uses fixed bpp */
357 int max_rate
, mode_rate
, max_lanes
, max_link_clock
;
359 max_link_clock
= intel_dp_max_link_rate(intel_dp
);
360 max_lanes
= drm_dp_max_lane_count(intel_dp
->dpcd
);
362 max_rate
= intel_dp_max_data_rate(max_link_clock
, max_lanes
);
363 mode_rate
= intel_dp_link_required(mode
->clock
, bpp
);
365 /* TODO - validate mode against available PBN for link */
366 if (mode
->clock
< 10000)
367 return MODE_CLOCK_LOW
;
369 if (mode
->flags
& DRM_MODE_FLAG_DBLCLK
)
370 return MODE_H_ILLEGAL
;
372 if (mode_rate
> max_rate
|| mode
->clock
> max_dotclk
)
373 return MODE_CLOCK_HIGH
;
378 static struct drm_encoder
*intel_mst_atomic_best_encoder(struct drm_connector
*connector
,
379 struct drm_connector_state
*state
)
381 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
382 struct intel_dp
*intel_dp
= intel_connector
->mst_port
;
383 struct intel_crtc
*crtc
= to_intel_crtc(state
->crtc
);
387 return &intel_dp
->mst_encoders
[crtc
->pipe
]->base
.base
;
390 static struct drm_encoder
*intel_mst_best_encoder(struct drm_connector
*connector
)
392 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
393 struct intel_dp
*intel_dp
= intel_connector
->mst_port
;
396 return &intel_dp
->mst_encoders
[0]->base
.base
;
399 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs
= {
400 .get_modes
= intel_dp_mst_get_modes
,
401 .mode_valid
= intel_dp_mst_mode_valid
,
402 .atomic_best_encoder
= intel_mst_atomic_best_encoder
,
403 .best_encoder
= intel_mst_best_encoder
,
406 static void intel_dp_mst_encoder_destroy(struct drm_encoder
*encoder
)
408 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(encoder
);
410 drm_encoder_cleanup(encoder
);
414 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs
= {
415 .destroy
= intel_dp_mst_encoder_destroy
,
418 static bool intel_dp_mst_get_hw_state(struct intel_connector
*connector
)
420 if (connector
->encoder
&& connector
->base
.state
->crtc
) {
422 if (!connector
->encoder
->get_hw_state(connector
->encoder
, &pipe
))
429 static void intel_connector_add_to_fbdev(struct intel_connector
*connector
)
431 #ifdef CONFIG_DRM_FBDEV_EMULATION
432 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
435 drm_fb_helper_add_one_connector(&dev_priv
->fbdev
->helper
,
440 static void intel_connector_remove_from_fbdev(struct intel_connector
*connector
)
442 #ifdef CONFIG_DRM_FBDEV_EMULATION
443 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
446 drm_fb_helper_remove_one_connector(&dev_priv
->fbdev
->helper
,
451 static struct drm_connector
*intel_dp_add_mst_connector(struct drm_dp_mst_topology_mgr
*mgr
, struct drm_dp_mst_port
*port
, const char *pathprop
)
453 struct intel_dp
*intel_dp
= container_of(mgr
, struct intel_dp
, mst_mgr
);
454 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
455 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
456 struct intel_connector
*intel_connector
;
457 struct drm_connector
*connector
;
460 intel_connector
= intel_connector_alloc();
461 if (!intel_connector
)
464 connector
= &intel_connector
->base
;
465 drm_connector_init(dev
, connector
, &intel_dp_mst_connector_funcs
, DRM_MODE_CONNECTOR_DisplayPort
);
466 drm_connector_helper_add(connector
, &intel_dp_mst_connector_helper_funcs
);
468 intel_connector
->get_hw_state
= intel_dp_mst_get_hw_state
;
469 intel_connector
->mst_port
= intel_dp
;
470 intel_connector
->port
= port
;
472 for (i
= PIPE_A
; i
<= PIPE_C
; i
++) {
473 drm_mode_connector_attach_encoder(&intel_connector
->base
,
474 &intel_dp
->mst_encoders
[i
]->base
.base
);
476 intel_dp_add_properties(intel_dp
, connector
);
478 drm_object_attach_property(&connector
->base
, dev
->mode_config
.path_property
, 0);
479 drm_object_attach_property(&connector
->base
, dev
->mode_config
.tile_property
, 0);
481 drm_mode_connector_set_path_property(connector
, pathprop
);
485 static void intel_dp_register_mst_connector(struct drm_connector
*connector
)
487 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
488 struct drm_device
*dev
= connector
->dev
;
490 drm_modeset_lock_all(dev
);
491 intel_connector_add_to_fbdev(intel_connector
);
492 drm_modeset_unlock_all(dev
);
494 drm_connector_register(&intel_connector
->base
);
497 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr
*mgr
,
498 struct drm_connector
*connector
)
500 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
501 struct drm_device
*dev
= connector
->dev
;
503 drm_connector_unregister(connector
);
505 /* need to nuke the connector */
506 drm_modeset_lock_all(dev
);
507 intel_connector_remove_from_fbdev(intel_connector
);
508 intel_connector
->mst_port
= NULL
;
509 drm_modeset_unlock_all(dev
);
511 drm_connector_unreference(&intel_connector
->base
);
515 static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr
*mgr
)
517 struct intel_dp
*intel_dp
= container_of(mgr
, struct intel_dp
, mst_mgr
);
518 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
519 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
521 drm_kms_helper_hotplug_event(dev
);
524 static const struct drm_dp_mst_topology_cbs mst_cbs
= {
525 .add_connector
= intel_dp_add_mst_connector
,
526 .register_connector
= intel_dp_register_mst_connector
,
527 .destroy_connector
= intel_dp_destroy_mst_connector
,
528 .hotplug
= intel_dp_mst_hotplug
,
531 static struct intel_dp_mst_encoder
*
532 intel_dp_create_fake_mst_encoder(struct intel_digital_port
*intel_dig_port
, enum pipe pipe
)
534 struct intel_dp_mst_encoder
*intel_mst
;
535 struct intel_encoder
*intel_encoder
;
536 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
538 intel_mst
= kzalloc(sizeof(*intel_mst
), GFP_KERNEL
);
543 intel_mst
->pipe
= pipe
;
544 intel_encoder
= &intel_mst
->base
;
545 intel_mst
->primary
= intel_dig_port
;
547 drm_encoder_init(dev
, &intel_encoder
->base
, &intel_dp_mst_enc_funcs
,
548 DRM_MODE_ENCODER_DPMST
, "DP-MST %c", pipe_name(pipe
));
550 intel_encoder
->type
= INTEL_OUTPUT_DP_MST
;
551 intel_encoder
->port
= intel_dig_port
->port
;
552 intel_encoder
->crtc_mask
= 0x7;
553 intel_encoder
->cloneable
= 0;
555 intel_encoder
->compute_config
= intel_dp_mst_compute_config
;
556 intel_encoder
->disable
= intel_mst_disable_dp
;
557 intel_encoder
->post_disable
= intel_mst_post_disable_dp
;
558 intel_encoder
->pre_enable
= intel_mst_pre_enable_dp
;
559 intel_encoder
->enable
= intel_mst_enable_dp
;
560 intel_encoder
->get_hw_state
= intel_dp_mst_enc_get_hw_state
;
561 intel_encoder
->get_config
= intel_dp_mst_enc_get_config
;
568 intel_dp_create_fake_mst_encoders(struct intel_digital_port
*intel_dig_port
)
571 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
573 for (i
= PIPE_A
; i
<= PIPE_C
; i
++)
574 intel_dp
->mst_encoders
[i
] = intel_dp_create_fake_mst_encoder(intel_dig_port
, i
);
579 intel_dp_mst_encoder_init(struct intel_digital_port
*intel_dig_port
, int conn_base_id
)
581 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
582 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
585 intel_dp
->can_mst
= true;
586 intel_dp
->mst_mgr
.cbs
= &mst_cbs
;
588 /* create encoders */
589 intel_dp_create_fake_mst_encoders(intel_dig_port
);
590 ret
= drm_dp_mst_topology_mgr_init(&intel_dp
->mst_mgr
, dev
,
591 &intel_dp
->aux
, 16, 3, conn_base_id
);
593 intel_dp
->can_mst
= false;
600 intel_dp_mst_encoder_cleanup(struct intel_digital_port
*intel_dig_port
)
602 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
604 if (!intel_dp
->can_mst
)
607 drm_dp_mst_topology_mgr_destroy(&intel_dp
->mst_mgr
);
608 /* encoders will get killed by normal cleanup */