2 * Copyright © 2014 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
21 * DEALINGS IN THE SOFTWARE.
23 * Author: Shobhit Kumar <shobhit.kumar@intel.com>
28 #include <drm/drm_crtc.h>
29 #include <drm/drm_edid.h>
30 #include <drm/i915_drm.h>
31 #include <drm/drm_panel.h>
32 #include <linux/slab.h>
33 #include <video/mipi_display.h>
34 #include <asm/intel-mid.h>
35 #include <video/mipi_display.h>
37 #include "intel_drv.h"
38 #include "intel_dsi.h"
41 struct drm_panel panel
;
42 struct intel_dsi
*intel_dsi
;
45 static inline struct vbt_panel
*to_vbt_panel(struct drm_panel
*panel
)
47 return container_of(panel
, struct vbt_panel
, panel
);
50 #define MIPI_TRANSFER_MODE_SHIFT 0
51 #define MIPI_VIRTUAL_CHANNEL_SHIFT 1
52 #define MIPI_PORT_SHIFT 3
54 #define PREPARE_CNT_MAX 0x3F
55 #define EXIT_ZERO_CNT_MAX 0x3F
56 #define CLK_ZERO_CNT_MAX 0xFF
57 #define TRAIL_CNT_MAX 0x1F
59 #define NS_KHZ_RATIO 1000000
61 #define GPI0_NC_0_HV_DDI0_HPD 0x4130
62 #define GPIO_NC_0_HV_DDI0_PAD 0x4138
63 #define GPIO_NC_1_HV_DDI0_DDC_SDA 0x4120
64 #define GPIO_NC_1_HV_DDI0_DDC_SDA_PAD 0x4128
65 #define GPIO_NC_2_HV_DDI0_DDC_SCL 0x4110
66 #define GPIO_NC_2_HV_DDI0_DDC_SCL_PAD 0x4118
67 #define GPIO_NC_3_PANEL0_VDDEN 0x4140
68 #define GPIO_NC_3_PANEL0_VDDEN_PAD 0x4148
69 #define GPIO_NC_4_PANEL0_BLKEN 0x4150
70 #define GPIO_NC_4_PANEL0_BLKEN_PAD 0x4158
71 #define GPIO_NC_5_PANEL0_BLKCTL 0x4160
72 #define GPIO_NC_5_PANEL0_BLKCTL_PAD 0x4168
73 #define GPIO_NC_6_PCONF0 0x4180
74 #define GPIO_NC_6_PAD 0x4188
75 #define GPIO_NC_7_PCONF0 0x4190
76 #define GPIO_NC_7_PAD 0x4198
77 #define GPIO_NC_8_PCONF0 0x4170
78 #define GPIO_NC_8_PAD 0x4178
79 #define GPIO_NC_9_PCONF0 0x4100
80 #define GPIO_NC_9_PAD 0x4108
81 #define GPIO_NC_10_PCONF0 0x40E0
82 #define GPIO_NC_10_PAD 0x40E8
83 #define GPIO_NC_11_PCONF0 0x40F0
84 #define GPIO_NC_11_PAD 0x40F8
92 static struct gpio_table gtable
[] = {
93 { GPI0_NC_0_HV_DDI0_HPD
, GPIO_NC_0_HV_DDI0_PAD
, 0 },
94 { GPIO_NC_1_HV_DDI0_DDC_SDA
, GPIO_NC_1_HV_DDI0_DDC_SDA_PAD
, 0 },
95 { GPIO_NC_2_HV_DDI0_DDC_SCL
, GPIO_NC_2_HV_DDI0_DDC_SCL_PAD
, 0 },
96 { GPIO_NC_3_PANEL0_VDDEN
, GPIO_NC_3_PANEL0_VDDEN_PAD
, 0 },
97 { GPIO_NC_4_PANEL0_BLKEN
, GPIO_NC_4_PANEL0_BLKEN_PAD
, 0 },
98 { GPIO_NC_5_PANEL0_BLKCTL
, GPIO_NC_5_PANEL0_BLKCTL_PAD
, 0 },
99 { GPIO_NC_6_PCONF0
, GPIO_NC_6_PAD
, 0 },
100 { GPIO_NC_7_PCONF0
, GPIO_NC_7_PAD
, 0 },
101 { GPIO_NC_8_PCONF0
, GPIO_NC_8_PAD
, 0 },
102 { GPIO_NC_9_PCONF0
, GPIO_NC_9_PAD
, 0 },
103 { GPIO_NC_10_PCONF0
, GPIO_NC_10_PAD
, 0},
104 { GPIO_NC_11_PCONF0
, GPIO_NC_11_PAD
, 0}
107 static inline enum port
intel_dsi_seq_port_to_port(u8 port
)
109 return port
? PORT_C
: PORT_A
;
112 static const u8
*mipi_exec_send_packet(struct intel_dsi
*intel_dsi
,
115 struct mipi_dsi_device
*dsi_device
;
116 u8 type
, flags
, seq_port
;
123 len
= *((u16
*) data
);
126 seq_port
= (flags
>> MIPI_PORT_SHIFT
) & 3;
128 /* For DSI single link on Port A & C, the seq_port value which is
129 * parsed from Sequence Block#53 of VBT has been set to 0
130 * Now, read/write of packets for the DSI single link on Port A and
131 * Port C will based on the DVO port from VBT block 2.
133 if (intel_dsi
->ports
== (1 << PORT_C
))
136 port
= intel_dsi_seq_port_to_port(seq_port
);
138 dsi_device
= intel_dsi
->dsi_hosts
[port
]->device
;
140 DRM_DEBUG_KMS("no dsi device for port %c\n", port_name(port
));
144 if ((flags
>> MIPI_TRANSFER_MODE_SHIFT
) & 1)
145 dsi_device
->mode_flags
&= ~MIPI_DSI_MODE_LPM
;
147 dsi_device
->mode_flags
|= MIPI_DSI_MODE_LPM
;
149 dsi_device
->channel
= (flags
>> MIPI_VIRTUAL_CHANNEL_SHIFT
) & 3;
152 case MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM
:
153 mipi_dsi_generic_write(dsi_device
, NULL
, 0);
155 case MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM
:
156 mipi_dsi_generic_write(dsi_device
, data
, 1);
158 case MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM
:
159 mipi_dsi_generic_write(dsi_device
, data
, 2);
161 case MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM
:
162 case MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM
:
163 case MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM
:
164 DRM_DEBUG_DRIVER("Generic Read not yet implemented or used\n");
166 case MIPI_DSI_GENERIC_LONG_WRITE
:
167 mipi_dsi_generic_write(dsi_device
, data
, len
);
169 case MIPI_DSI_DCS_SHORT_WRITE
:
170 mipi_dsi_dcs_write_buffer(dsi_device
, data
, 1);
172 case MIPI_DSI_DCS_SHORT_WRITE_PARAM
:
173 mipi_dsi_dcs_write_buffer(dsi_device
, data
, 2);
175 case MIPI_DSI_DCS_READ
:
176 DRM_DEBUG_DRIVER("DCS Read not yet implemented or used\n");
178 case MIPI_DSI_DCS_LONG_WRITE
:
179 mipi_dsi_dcs_write_buffer(dsi_device
, data
, len
);
189 static const u8
*mipi_exec_delay(struct intel_dsi
*intel_dsi
, const u8
*data
)
191 u32 delay
= *((const u32
*) data
);
193 usleep_range(delay
, delay
+ 10);
199 static const u8
*mipi_exec_gpio(struct intel_dsi
*intel_dsi
, const u8
*data
)
204 struct drm_device
*dev
= intel_dsi
->base
.base
.dev
;
205 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
212 function
= gtable
[gpio
].function_reg
;
213 pad
= gtable
[gpio
].pad_reg
;
215 mutex_lock(&dev_priv
->sb_lock
);
216 if (!gtable
[gpio
].init
) {
217 /* program the function */
218 /* FIXME: remove constant below */
219 vlv_gpio_nc_write(dev_priv
, function
, 0x2000CC00);
220 gtable
[gpio
].init
= 1;
226 vlv_gpio_nc_write(dev_priv
, pad
, val
);
227 mutex_unlock(&dev_priv
->sb_lock
);
232 static const u8
*mipi_exec_i2c_skip(struct intel_dsi
*intel_dsi
, const u8
*data
)
234 return data
+ *(data
+ 6) + 7;
237 typedef const u8
* (*fn_mipi_elem_exec
)(struct intel_dsi
*intel_dsi
,
239 static const fn_mipi_elem_exec exec_elem
[] = {
240 [MIPI_SEQ_ELEM_SEND_PKT
] = mipi_exec_send_packet
,
241 [MIPI_SEQ_ELEM_DELAY
] = mipi_exec_delay
,
242 [MIPI_SEQ_ELEM_GPIO
] = mipi_exec_gpio
,
243 [MIPI_SEQ_ELEM_I2C
] = mipi_exec_i2c_skip
,
247 * MIPI Sequence from VBT #53 parsing logic
248 * We have already separated each seqence during bios parsing
249 * Following is generic execution function for any sequence
252 static const char * const seq_name
[] = {
253 [MIPI_SEQ_ASSERT_RESET
] = "MIPI_SEQ_ASSERT_RESET",
254 [MIPI_SEQ_INIT_OTP
] = "MIPI_SEQ_INIT_OTP",
255 [MIPI_SEQ_DISPLAY_ON
] = "MIPI_SEQ_DISPLAY_ON",
256 [MIPI_SEQ_DISPLAY_OFF
] = "MIPI_SEQ_DISPLAY_OFF",
257 [MIPI_SEQ_DEASSERT_RESET
] = "MIPI_SEQ_DEASSERT_RESET",
260 static const char *sequence_name(enum mipi_seq seq_id
)
262 if (seq_id
< ARRAY_SIZE(seq_name
) && seq_name
[seq_id
])
263 return seq_name
[seq_id
];
268 static void generic_exec_sequence(struct intel_dsi
*intel_dsi
, const u8
*data
)
270 fn_mipi_elem_exec mipi_elem_exec
;
275 DRM_DEBUG_DRIVER("Starting MIPI sequence %u - %s\n",
276 *data
, sequence_name(*data
));
278 /* go to the first element of the sequence */
281 /* parse each byte till we reach end of sequence byte - 0x00 */
283 u8 operation_byte
= *data
++;
284 if (operation_byte
>= ARRAY_SIZE(exec_elem
) ||
285 !exec_elem
[operation_byte
]) {
286 DRM_ERROR("Unsupported MIPI operation byte %u\n",
290 mipi_elem_exec
= exec_elem
[operation_byte
];
292 /* execute the element specific rotines */
293 data
= mipi_elem_exec(intel_dsi
, data
);
296 * After processing the element, data should point to
297 * next element or end of sequence
298 * check if have we reached end of sequence
305 static int vbt_panel_prepare(struct drm_panel
*panel
)
307 struct vbt_panel
*vbt_panel
= to_vbt_panel(panel
);
308 struct intel_dsi
*intel_dsi
= vbt_panel
->intel_dsi
;
309 struct drm_device
*dev
= intel_dsi
->base
.base
.dev
;
310 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
313 sequence
= dev_priv
->vbt
.dsi
.sequence
[MIPI_SEQ_ASSERT_RESET
];
314 generic_exec_sequence(intel_dsi
, sequence
);
316 sequence
= dev_priv
->vbt
.dsi
.sequence
[MIPI_SEQ_INIT_OTP
];
317 generic_exec_sequence(intel_dsi
, sequence
);
322 static int vbt_panel_unprepare(struct drm_panel
*panel
)
324 struct vbt_panel
*vbt_panel
= to_vbt_panel(panel
);
325 struct intel_dsi
*intel_dsi
= vbt_panel
->intel_dsi
;
326 struct drm_device
*dev
= intel_dsi
->base
.base
.dev
;
327 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
330 sequence
= dev_priv
->vbt
.dsi
.sequence
[MIPI_SEQ_DEASSERT_RESET
];
331 generic_exec_sequence(intel_dsi
, sequence
);
336 static int vbt_panel_enable(struct drm_panel
*panel
)
338 struct vbt_panel
*vbt_panel
= to_vbt_panel(panel
);
339 struct intel_dsi
*intel_dsi
= vbt_panel
->intel_dsi
;
340 struct drm_device
*dev
= intel_dsi
->base
.base
.dev
;
341 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
344 sequence
= dev_priv
->vbt
.dsi
.sequence
[MIPI_SEQ_DISPLAY_ON
];
345 generic_exec_sequence(intel_dsi
, sequence
);
350 static int vbt_panel_disable(struct drm_panel
*panel
)
352 struct vbt_panel
*vbt_panel
= to_vbt_panel(panel
);
353 struct intel_dsi
*intel_dsi
= vbt_panel
->intel_dsi
;
354 struct drm_device
*dev
= intel_dsi
->base
.base
.dev
;
355 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
358 sequence
= dev_priv
->vbt
.dsi
.sequence
[MIPI_SEQ_DISPLAY_OFF
];
359 generic_exec_sequence(intel_dsi
, sequence
);
364 static int vbt_panel_get_modes(struct drm_panel
*panel
)
366 struct vbt_panel
*vbt_panel
= to_vbt_panel(panel
);
367 struct intel_dsi
*intel_dsi
= vbt_panel
->intel_dsi
;
368 struct drm_device
*dev
= intel_dsi
->base
.base
.dev
;
369 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
370 struct drm_display_mode
*mode
;
372 if (!panel
->connector
)
375 mode
= drm_mode_duplicate(dev
, dev_priv
->vbt
.lfp_lvds_vbt_mode
);
379 mode
->type
|= DRM_MODE_TYPE_PREFERRED
;
381 drm_mode_probed_add(panel
->connector
, mode
);
386 static const struct drm_panel_funcs vbt_panel_funcs
= {
387 .disable
= vbt_panel_disable
,
388 .unprepare
= vbt_panel_unprepare
,
389 .prepare
= vbt_panel_prepare
,
390 .enable
= vbt_panel_enable
,
391 .get_modes
= vbt_panel_get_modes
,
394 struct drm_panel
*vbt_panel_init(struct intel_dsi
*intel_dsi
, u16 panel_id
)
396 struct drm_device
*dev
= intel_dsi
->base
.base
.dev
;
397 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
398 struct mipi_config
*mipi_config
= dev_priv
->vbt
.dsi
.config
;
399 struct mipi_pps_data
*pps
= dev_priv
->vbt
.dsi
.pps
;
400 struct drm_display_mode
*mode
= dev_priv
->vbt
.lfp_lvds_vbt_mode
;
401 struct vbt_panel
*vbt_panel
;
402 u32 bits_per_pixel
= 24;
403 u32 tlpx_ns
, extra_byte_count
, bitrate
, tlpx_ui
;
405 u32 prepare_cnt
, exit_zero_cnt
, clk_zero_cnt
, trail_cnt
;
406 u32 ths_prepare_ns
, tclk_trail_ns
;
407 u32 tclk_prepare_clkzero
, ths_prepare_hszero
;
408 u32 lp_to_hs_switch
, hs_to_lp_switch
;
409 u32 pclk
, computed_ddr
;
410 u16 burst_mode_ratio
;
415 intel_dsi
->eotp_pkt
= mipi_config
->eot_pkt_disabled
? 0 : 1;
416 intel_dsi
->clock_stop
= mipi_config
->enable_clk_stop
? 1 : 0;
417 intel_dsi
->lane_count
= mipi_config
->lane_cnt
+ 1;
418 intel_dsi
->pixel_format
= mipi_config
->videomode_color_format
<< 7;
419 intel_dsi
->dual_link
= mipi_config
->dual_link
;
420 intel_dsi
->pixel_overlap
= mipi_config
->pixel_overlap
;
422 if (intel_dsi
->pixel_format
== VID_MODE_FORMAT_RGB666
)
424 else if (intel_dsi
->pixel_format
== VID_MODE_FORMAT_RGB565
)
427 intel_dsi
->operation_mode
= mipi_config
->is_cmd_mode
;
428 intel_dsi
->video_mode_format
= mipi_config
->video_transfer_mode
;
429 intel_dsi
->escape_clk_div
= mipi_config
->byte_clk_sel
;
430 intel_dsi
->lp_rx_timeout
= mipi_config
->lp_rx_timeout
;
431 intel_dsi
->turn_arnd_val
= mipi_config
->turn_around_timeout
;
432 intel_dsi
->rst_timer_val
= mipi_config
->device_reset_timer
;
433 intel_dsi
->init_count
= mipi_config
->master_init_timer
;
434 intel_dsi
->bw_timer
= mipi_config
->dbi_bw_timer
;
435 intel_dsi
->video_frmt_cfg_bits
=
436 mipi_config
->bta_enabled
? DISABLE_VIDEO_BTA
: 0;
440 /* In dual link mode each port needs half of pixel clock */
441 if (intel_dsi
->dual_link
) {
444 /* we can enable pixel_overlap if needed by panel. In this
445 * case we need to increase the pixelclock for extra pixels
447 if (intel_dsi
->dual_link
== DSI_DUAL_LINK_FRONT_BACK
) {
448 pclk
+= DIV_ROUND_UP(mode
->vtotal
*
449 intel_dsi
->pixel_overlap
*
455 * Target ddr frequency from VBT / non burst ddr freq
456 * multiply by 100 to preserve remainder
458 if (intel_dsi
->video_mode_format
== VIDEO_MODE_BURST
) {
459 if (mipi_config
->target_burst_mode_freq
) {
461 (pclk
* bits_per_pixel
) / intel_dsi
->lane_count
;
463 if (mipi_config
->target_burst_mode_freq
<
465 DRM_ERROR("Burst mode freq is less than computed\n");
469 burst_mode_ratio
= DIV_ROUND_UP(
470 mipi_config
->target_burst_mode_freq
* 100,
473 pclk
= DIV_ROUND_UP(pclk
* burst_mode_ratio
, 100);
475 DRM_ERROR("Burst mode target is not set\n");
479 burst_mode_ratio
= 100;
481 intel_dsi
->burst_mode_ratio
= burst_mode_ratio
;
482 intel_dsi
->pclk
= pclk
;
484 bitrate
= (pclk
* bits_per_pixel
) / intel_dsi
->lane_count
;
486 switch (intel_dsi
->escape_clk_div
) {
502 switch (intel_dsi
->lane_count
) {
505 extra_byte_count
= 2;
508 extra_byte_count
= 4;
512 extra_byte_count
= 3;
517 * ui(s) = 1/f [f in hz]
518 * ui(ns) = 10^9 / (f*10^6) [f in Mhz] -> 10^3/f(Mhz)
522 ui_num
= NS_KHZ_RATIO
;
525 tclk_prepare_clkzero
= mipi_config
->tclk_prepare_clkzero
;
526 ths_prepare_hszero
= mipi_config
->ths_prepare_hszero
;
530 * LP byte clock = TLPX/ (8UI)
532 intel_dsi
->lp_byte_clk
= DIV_ROUND_UP(tlpx_ns
* ui_den
, 8 * ui_num
);
534 /* count values in UI = (ns value) * (bitrate / (2 * 10^6))
536 * Since txddrclkhs_i is 2xUI, all the count values programmed in
537 * DPHY param register are divided by 2
541 ths_prepare_ns
= max(mipi_config
->ths_prepare
,
542 mipi_config
->tclk_prepare
);
543 prepare_cnt
= DIV_ROUND_UP(ths_prepare_ns
* ui_den
, ui_num
* 2);
545 /* exit zero count */
546 exit_zero_cnt
= DIV_ROUND_UP(
547 (ths_prepare_hszero
- ths_prepare_ns
) * ui_den
,
552 * Exit zero is unified val ths_zero and ths_exit
553 * minimum value for ths_exit = 110ns
554 * min (exit_zero_cnt * 2) = 110/UI
555 * exit_zero_cnt = 55/UI
557 if (exit_zero_cnt
< (55 * ui_den
/ ui_num
))
558 if ((55 * ui_den
) % ui_num
)
562 clk_zero_cnt
= DIV_ROUND_UP(
563 (tclk_prepare_clkzero
- ths_prepare_ns
)
564 * ui_den
, 2 * ui_num
);
567 tclk_trail_ns
= max(mipi_config
->tclk_trail
, mipi_config
->ths_trail
);
568 trail_cnt
= DIV_ROUND_UP(tclk_trail_ns
* ui_den
, 2 * ui_num
);
570 if (prepare_cnt
> PREPARE_CNT_MAX
||
571 exit_zero_cnt
> EXIT_ZERO_CNT_MAX
||
572 clk_zero_cnt
> CLK_ZERO_CNT_MAX
||
573 trail_cnt
> TRAIL_CNT_MAX
)
574 DRM_DEBUG_DRIVER("Values crossing maximum limits, restricting to max values\n");
576 if (prepare_cnt
> PREPARE_CNT_MAX
)
577 prepare_cnt
= PREPARE_CNT_MAX
;
579 if (exit_zero_cnt
> EXIT_ZERO_CNT_MAX
)
580 exit_zero_cnt
= EXIT_ZERO_CNT_MAX
;
582 if (clk_zero_cnt
> CLK_ZERO_CNT_MAX
)
583 clk_zero_cnt
= CLK_ZERO_CNT_MAX
;
585 if (trail_cnt
> TRAIL_CNT_MAX
)
586 trail_cnt
= TRAIL_CNT_MAX
;
589 intel_dsi
->dphy_reg
= exit_zero_cnt
<< 24 | trail_cnt
<< 16 |
590 clk_zero_cnt
<< 8 | prepare_cnt
;
593 * LP to HS switch count = 4TLPX + PREP_COUNT * 2 + EXIT_ZERO_COUNT * 2
594 * + 10UI + Extra Byte Count
596 * HS to LP switch count = THS-TRAIL + 2TLPX + Extra Byte Count
597 * Extra Byte Count is calculated according to number of lanes.
598 * High Low Switch Count is the Max of LP to HS and
599 * HS to LP switch count
602 tlpx_ui
= DIV_ROUND_UP(tlpx_ns
* ui_den
, ui_num
);
606 * The comment above does not match with the code */
607 lp_to_hs_switch
= DIV_ROUND_UP(4 * tlpx_ui
+ prepare_cnt
* 2 +
608 exit_zero_cnt
* 2 + 10, 8);
610 hs_to_lp_switch
= DIV_ROUND_UP(mipi_config
->ths_trail
+ 2 * tlpx_ui
, 8);
612 intel_dsi
->hs_to_lp_count
= max(lp_to_hs_switch
, hs_to_lp_switch
);
613 intel_dsi
->hs_to_lp_count
+= extra_byte_count
;
616 /* LP -> HS for clock lanes
617 * LP clk sync + LP11 + LP01 + tclk_prepare + tclk_zero +
619 * 2TPLX + 1TLPX + 1 TPLX(in ns) + prepare_cnt * 2 + clk_zero_cnt *
620 * 2(in UI) + extra byte count
621 * In byteclks = (4TLPX + prepare_cnt * 2 + clk_zero_cnt *2 (in UI)) /
622 * 8 + extra byte count
624 intel_dsi
->clk_lp_to_hs_count
=
626 4 * tlpx_ui
+ prepare_cnt
* 2 +
630 intel_dsi
->clk_lp_to_hs_count
+= extra_byte_count
;
632 /* HS->LP for Clock Lanes
633 * Low Power clock synchronisations + 1Tx byteclk + tclk_trail +
635 * 2TLPX + 8UI + (trail_count*2)(in UI) + Extra byte count
636 * In byteclks = (2*TLpx(in UI) + trail_count*2 +8)(in UI)/8 +
639 intel_dsi
->clk_hs_to_lp_count
=
640 DIV_ROUND_UP(2 * tlpx_ui
+ trail_cnt
* 2 + 8,
642 intel_dsi
->clk_hs_to_lp_count
+= extra_byte_count
;
644 DRM_DEBUG_KMS("Eot %s\n", intel_dsi
->eotp_pkt
? "enabled" : "disabled");
645 DRM_DEBUG_KMS("Clockstop %s\n", intel_dsi
->clock_stop
?
646 "disabled" : "enabled");
647 DRM_DEBUG_KMS("Mode %s\n", intel_dsi
->operation_mode
? "command" : "video");
648 if (intel_dsi
->dual_link
== DSI_DUAL_LINK_FRONT_BACK
)
649 DRM_DEBUG_KMS("Dual link: DSI_DUAL_LINK_FRONT_BACK\n");
650 else if (intel_dsi
->dual_link
== DSI_DUAL_LINK_PIXEL_ALT
)
651 DRM_DEBUG_KMS("Dual link: DSI_DUAL_LINK_PIXEL_ALT\n");
653 DRM_DEBUG_KMS("Dual link: NONE\n");
654 DRM_DEBUG_KMS("Pixel Format %d\n", intel_dsi
->pixel_format
);
655 DRM_DEBUG_KMS("TLPX %d\n", intel_dsi
->escape_clk_div
);
656 DRM_DEBUG_KMS("LP RX Timeout 0x%x\n", intel_dsi
->lp_rx_timeout
);
657 DRM_DEBUG_KMS("Turnaround Timeout 0x%x\n", intel_dsi
->turn_arnd_val
);
658 DRM_DEBUG_KMS("Init Count 0x%x\n", intel_dsi
->init_count
);
659 DRM_DEBUG_KMS("HS to LP Count 0x%x\n", intel_dsi
->hs_to_lp_count
);
660 DRM_DEBUG_KMS("LP Byte Clock %d\n", intel_dsi
->lp_byte_clk
);
661 DRM_DEBUG_KMS("DBI BW Timer 0x%x\n", intel_dsi
->bw_timer
);
662 DRM_DEBUG_KMS("LP to HS Clock Count 0x%x\n", intel_dsi
->clk_lp_to_hs_count
);
663 DRM_DEBUG_KMS("HS to LP Clock Count 0x%x\n", intel_dsi
->clk_hs_to_lp_count
);
664 DRM_DEBUG_KMS("BTA %s\n",
665 intel_dsi
->video_frmt_cfg_bits
& DISABLE_VIDEO_BTA
?
666 "disabled" : "enabled");
668 /* delays in VBT are in unit of 100us, so need to convert
670 * Delay (100us) * 100 /1000 = Delay / 10 (ms) */
671 intel_dsi
->backlight_off_delay
= pps
->bl_disable_delay
/ 10;
672 intel_dsi
->backlight_on_delay
= pps
->bl_enable_delay
/ 10;
673 intel_dsi
->panel_on_delay
= pps
->panel_on_delay
/ 10;
674 intel_dsi
->panel_off_delay
= pps
->panel_off_delay
/ 10;
675 intel_dsi
->panel_pwr_cycle_delay
= pps
->panel_power_cycle_delay
/ 10;
677 /* This is cheating a bit with the cleanup. */
678 vbt_panel
= devm_kzalloc(dev
->dev
, sizeof(*vbt_panel
), GFP_KERNEL
);
682 vbt_panel
->intel_dsi
= intel_dsi
;
683 drm_panel_init(&vbt_panel
->panel
);
684 vbt_panel
->panel
.funcs
= &vbt_panel_funcs
;
685 drm_panel_add(&vbt_panel
->panel
);
687 /* a regular driver would get the device in probe */
688 for_each_dsi_port(port
, intel_dsi
->ports
) {
689 mipi_dsi_attach(intel_dsi
->dsi_hosts
[port
]->device
);
692 return &vbt_panel
->panel
;