2 * Copyright © 2006 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 FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24 * Eric Anholt <eric@anholt.net>
27 #include <linux/dmi.h>
28 #include <drm/drm_dp_helper.h>
30 #include <drm/i915_drm.h>
32 #include "intel_bios.h"
34 #define SLAVE_ADDR1 0x70
35 #define SLAVE_ADDR2 0x72
37 static int panel_type
;
40 find_section(struct bdb_header
*bdb
, int section_id
)
44 u16 total
, current_size
;
47 /* skip to first section */
48 index
+= bdb
->header_size
;
49 total
= bdb
->bdb_size
;
51 /* walk the sections looking for section_id */
52 while (index
+ 3 < total
) {
53 current_id
= *(base
+ index
);
56 current_size
= *((u16
*)(base
+ index
));
59 if (index
+ current_size
> total
)
62 if (current_id
== section_id
)
65 index
+= current_size
;
72 get_blocksize(void *p
)
74 u16
*block_ptr
, block_size
;
76 block_ptr
= (u16
*)((char *)p
- 2);
77 block_size
= *block_ptr
;
82 fill_detail_timing_data(struct drm_display_mode
*panel_fixed_mode
,
83 const struct lvds_dvo_timing
*dvo_timing
)
85 panel_fixed_mode
->hdisplay
= (dvo_timing
->hactive_hi
<< 8) |
86 dvo_timing
->hactive_lo
;
87 panel_fixed_mode
->hsync_start
= panel_fixed_mode
->hdisplay
+
88 ((dvo_timing
->hsync_off_hi
<< 8) | dvo_timing
->hsync_off_lo
);
89 panel_fixed_mode
->hsync_end
= panel_fixed_mode
->hsync_start
+
90 dvo_timing
->hsync_pulse_width
;
91 panel_fixed_mode
->htotal
= panel_fixed_mode
->hdisplay
+
92 ((dvo_timing
->hblank_hi
<< 8) | dvo_timing
->hblank_lo
);
94 panel_fixed_mode
->vdisplay
= (dvo_timing
->vactive_hi
<< 8) |
95 dvo_timing
->vactive_lo
;
96 panel_fixed_mode
->vsync_start
= panel_fixed_mode
->vdisplay
+
97 dvo_timing
->vsync_off
;
98 panel_fixed_mode
->vsync_end
= panel_fixed_mode
->vsync_start
+
99 dvo_timing
->vsync_pulse_width
;
100 panel_fixed_mode
->vtotal
= panel_fixed_mode
->vdisplay
+
101 ((dvo_timing
->vblank_hi
<< 8) | dvo_timing
->vblank_lo
);
102 panel_fixed_mode
->clock
= dvo_timing
->clock
* 10;
103 panel_fixed_mode
->type
= DRM_MODE_TYPE_PREFERRED
;
105 if (dvo_timing
->hsync_positive
)
106 panel_fixed_mode
->flags
|= DRM_MODE_FLAG_PHSYNC
;
108 panel_fixed_mode
->flags
|= DRM_MODE_FLAG_NHSYNC
;
110 if (dvo_timing
->vsync_positive
)
111 panel_fixed_mode
->flags
|= DRM_MODE_FLAG_PVSYNC
;
113 panel_fixed_mode
->flags
|= DRM_MODE_FLAG_NVSYNC
;
115 /* Some VBTs have bogus h/vtotal values */
116 if (panel_fixed_mode
->hsync_end
> panel_fixed_mode
->htotal
)
117 panel_fixed_mode
->htotal
= panel_fixed_mode
->hsync_end
+ 1;
118 if (panel_fixed_mode
->vsync_end
> panel_fixed_mode
->vtotal
)
119 panel_fixed_mode
->vtotal
= panel_fixed_mode
->vsync_end
+ 1;
121 drm_mode_set_name(panel_fixed_mode
);
125 lvds_dvo_timing_equal_size(const struct lvds_dvo_timing
*a
,
126 const struct lvds_dvo_timing
*b
)
128 if (a
->hactive_hi
!= b
->hactive_hi
||
129 a
->hactive_lo
!= b
->hactive_lo
)
132 if (a
->hsync_off_hi
!= b
->hsync_off_hi
||
133 a
->hsync_off_lo
!= b
->hsync_off_lo
)
136 if (a
->hsync_pulse_width
!= b
->hsync_pulse_width
)
139 if (a
->hblank_hi
!= b
->hblank_hi
||
140 a
->hblank_lo
!= b
->hblank_lo
)
143 if (a
->vactive_hi
!= b
->vactive_hi
||
144 a
->vactive_lo
!= b
->vactive_lo
)
147 if (a
->vsync_off
!= b
->vsync_off
)
150 if (a
->vsync_pulse_width
!= b
->vsync_pulse_width
)
153 if (a
->vblank_hi
!= b
->vblank_hi
||
154 a
->vblank_lo
!= b
->vblank_lo
)
160 static const struct lvds_dvo_timing
*
161 get_lvds_dvo_timing(const struct bdb_lvds_lfp_data
*lvds_lfp_data
,
162 const struct bdb_lvds_lfp_data_ptrs
*lvds_lfp_data_ptrs
,
166 * the size of fp_timing varies on the different platform.
167 * So calculate the DVO timing relative offset in LVDS data
168 * entry to get the DVO timing entry
172 lvds_lfp_data_ptrs
->ptr
[1].dvo_timing_offset
-
173 lvds_lfp_data_ptrs
->ptr
[0].dvo_timing_offset
;
174 int dvo_timing_offset
=
175 lvds_lfp_data_ptrs
->ptr
[0].dvo_timing_offset
-
176 lvds_lfp_data_ptrs
->ptr
[0].fp_timing_offset
;
177 char *entry
= (char *)lvds_lfp_data
->data
+ lfp_data_size
* index
;
179 return (struct lvds_dvo_timing
*)(entry
+ dvo_timing_offset
);
182 /* get lvds_fp_timing entry
183 * this function may return NULL if the corresponding entry is invalid
185 static const struct lvds_fp_timing
*
186 get_lvds_fp_timing(const struct bdb_header
*bdb
,
187 const struct bdb_lvds_lfp_data
*data
,
188 const struct bdb_lvds_lfp_data_ptrs
*ptrs
,
191 size_t data_ofs
= (const u8
*)data
- (const u8
*)bdb
;
192 u16 data_size
= ((const u16
*)data
)[-1]; /* stored in header */
195 if (index
>= ARRAY_SIZE(ptrs
->ptr
))
197 ofs
= ptrs
->ptr
[index
].fp_timing_offset
;
198 if (ofs
< data_ofs
||
199 ofs
+ sizeof(struct lvds_fp_timing
) > data_ofs
+ data_size
)
201 return (const struct lvds_fp_timing
*)((const u8
*)bdb
+ ofs
);
204 /* Try to find integrated panel data */
206 parse_lfp_panel_data(struct drm_i915_private
*dev_priv
,
207 struct bdb_header
*bdb
)
209 const struct bdb_lvds_options
*lvds_options
;
210 const struct bdb_lvds_lfp_data
*lvds_lfp_data
;
211 const struct bdb_lvds_lfp_data_ptrs
*lvds_lfp_data_ptrs
;
212 const struct lvds_dvo_timing
*panel_dvo_timing
;
213 const struct lvds_fp_timing
*fp_timing
;
214 struct drm_display_mode
*panel_fixed_mode
;
215 int i
, downclock
, drrs_mode
;
217 lvds_options
= find_section(bdb
, BDB_LVDS_OPTIONS
);
221 dev_priv
->vbt
.lvds_dither
= lvds_options
->pixel_dither
;
222 if (lvds_options
->panel_type
== 0xff)
225 panel_type
= lvds_options
->panel_type
;
227 drrs_mode
= (lvds_options
->dps_panel_type_bits
228 >> (panel_type
* 2)) & MODE_MASK
;
230 * VBT has static DRRS = 0 and seamless DRRS = 2.
231 * The below piece of code is required to adjust vbt.drrs_type
232 * to match the enum drrs_support_type.
236 dev_priv
->vbt
.drrs_type
= STATIC_DRRS_SUPPORT
;
237 DRM_DEBUG_KMS("DRRS supported mode is static\n");
240 dev_priv
->vbt
.drrs_type
= SEAMLESS_DRRS_SUPPORT
;
241 DRM_DEBUG_KMS("DRRS supported mode is seamless\n");
244 dev_priv
->vbt
.drrs_type
= DRRS_NOT_SUPPORTED
;
245 DRM_DEBUG_KMS("DRRS not supported (VBT input)\n");
249 lvds_lfp_data
= find_section(bdb
, BDB_LVDS_LFP_DATA
);
253 lvds_lfp_data_ptrs
= find_section(bdb
, BDB_LVDS_LFP_DATA_PTRS
);
254 if (!lvds_lfp_data_ptrs
)
257 dev_priv
->vbt
.lvds_vbt
= 1;
259 panel_dvo_timing
= get_lvds_dvo_timing(lvds_lfp_data
,
261 lvds_options
->panel_type
);
263 panel_fixed_mode
= kzalloc(sizeof(*panel_fixed_mode
), GFP_KERNEL
);
264 if (!panel_fixed_mode
)
267 fill_detail_timing_data(panel_fixed_mode
, panel_dvo_timing
);
269 dev_priv
->vbt
.lfp_lvds_vbt_mode
= panel_fixed_mode
;
271 DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n");
272 drm_mode_debug_printmodeline(panel_fixed_mode
);
275 * Iterate over the LVDS panel timing info to find the lowest clock
276 * for the native resolution.
278 downclock
= panel_dvo_timing
->clock
;
279 for (i
= 0; i
< 16; i
++) {
280 const struct lvds_dvo_timing
*dvo_timing
;
282 dvo_timing
= get_lvds_dvo_timing(lvds_lfp_data
,
285 if (lvds_dvo_timing_equal_size(dvo_timing
, panel_dvo_timing
) &&
286 dvo_timing
->clock
< downclock
)
287 downclock
= dvo_timing
->clock
;
290 if (downclock
< panel_dvo_timing
->clock
&& i915
.lvds_downclock
) {
291 dev_priv
->lvds_downclock_avail
= 1;
292 dev_priv
->lvds_downclock
= downclock
* 10;
293 DRM_DEBUG_KMS("LVDS downclock is found in VBT. "
294 "Normal Clock %dKHz, downclock %dKHz\n",
295 panel_fixed_mode
->clock
, 10*downclock
);
298 fp_timing
= get_lvds_fp_timing(bdb
, lvds_lfp_data
,
300 lvds_options
->panel_type
);
302 /* check the resolution, just to be sure */
303 if (fp_timing
->x_res
== panel_fixed_mode
->hdisplay
&&
304 fp_timing
->y_res
== panel_fixed_mode
->vdisplay
) {
305 dev_priv
->vbt
.bios_lvds_val
= fp_timing
->lvds_reg_val
;
306 DRM_DEBUG_KMS("VBT initial LVDS value %x\n",
307 dev_priv
->vbt
.bios_lvds_val
);
313 parse_lfp_backlight(struct drm_i915_private
*dev_priv
, struct bdb_header
*bdb
)
315 const struct bdb_lfp_backlight_data
*backlight_data
;
316 const struct bdb_lfp_backlight_data_entry
*entry
;
318 backlight_data
= find_section(bdb
, BDB_LVDS_BACKLIGHT
);
322 if (backlight_data
->entry_size
!= sizeof(backlight_data
->data
[0])) {
323 DRM_DEBUG_KMS("Unsupported backlight data entry size %u\n",
324 backlight_data
->entry_size
);
328 entry
= &backlight_data
->data
[panel_type
];
330 dev_priv
->vbt
.backlight
.present
= entry
->type
== BDB_BACKLIGHT_TYPE_PWM
;
331 if (!dev_priv
->vbt
.backlight
.present
) {
332 DRM_DEBUG_KMS("PWM backlight not present in VBT (type %u)\n",
337 dev_priv
->vbt
.backlight
.pwm_freq_hz
= entry
->pwm_freq_hz
;
338 dev_priv
->vbt
.backlight
.active_low_pwm
= entry
->active_low_pwm
;
339 DRM_DEBUG_KMS("VBT backlight PWM modulation frequency %u Hz, "
340 "active %s, min brightness %u, level %u\n",
341 dev_priv
->vbt
.backlight
.pwm_freq_hz
,
342 dev_priv
->vbt
.backlight
.active_low_pwm
? "low" : "high",
343 entry
->min_brightness
,
344 backlight_data
->level
[panel_type
]);
347 /* Try to find sdvo panel data */
349 parse_sdvo_panel_data(struct drm_i915_private
*dev_priv
,
350 struct bdb_header
*bdb
)
352 struct lvds_dvo_timing
*dvo_timing
;
353 struct drm_display_mode
*panel_fixed_mode
;
356 index
= i915
.vbt_sdvo_panel_type
;
358 DRM_DEBUG_KMS("Ignore SDVO panel mode from BIOS VBT tables.\n");
363 struct bdb_sdvo_lvds_options
*sdvo_lvds_options
;
365 sdvo_lvds_options
= find_section(bdb
, BDB_SDVO_LVDS_OPTIONS
);
366 if (!sdvo_lvds_options
)
369 index
= sdvo_lvds_options
->panel_type
;
372 dvo_timing
= find_section(bdb
, BDB_SDVO_PANEL_DTDS
);
376 panel_fixed_mode
= kzalloc(sizeof(*panel_fixed_mode
), GFP_KERNEL
);
377 if (!panel_fixed_mode
)
380 fill_detail_timing_data(panel_fixed_mode
, dvo_timing
+ index
);
382 dev_priv
->vbt
.sdvo_lvds_vbt_mode
= panel_fixed_mode
;
384 DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n");
385 drm_mode_debug_printmodeline(panel_fixed_mode
);
388 static int intel_bios_ssc_frequency(struct drm_device
*dev
,
391 switch (INTEL_INFO(dev
)->gen
) {
393 return alternate
? 66667 : 48000;
396 return alternate
? 100000 : 96000;
398 return alternate
? 100000 : 120000;
403 parse_general_features(struct drm_i915_private
*dev_priv
,
404 struct bdb_header
*bdb
)
406 struct drm_device
*dev
= dev_priv
->dev
;
407 struct bdb_general_features
*general
;
409 general
= find_section(bdb
, BDB_GENERAL_FEATURES
);
411 dev_priv
->vbt
.int_tv_support
= general
->int_tv_support
;
412 dev_priv
->vbt
.int_crt_support
= general
->int_crt_support
;
413 dev_priv
->vbt
.lvds_use_ssc
= general
->enable_ssc
;
414 dev_priv
->vbt
.lvds_ssc_freq
=
415 intel_bios_ssc_frequency(dev
, general
->ssc_freq
);
416 dev_priv
->vbt
.display_clock_mode
= general
->display_clock_mode
;
417 dev_priv
->vbt
.fdi_rx_polarity_inverted
= general
->fdi_rx_polarity_inverted
;
418 DRM_DEBUG_KMS("BDB_GENERAL_FEATURES int_tv_support %d int_crt_support %d lvds_use_ssc %d lvds_ssc_freq %d display_clock_mode %d fdi_rx_polarity_inverted %d\n",
419 dev_priv
->vbt
.int_tv_support
,
420 dev_priv
->vbt
.int_crt_support
,
421 dev_priv
->vbt
.lvds_use_ssc
,
422 dev_priv
->vbt
.lvds_ssc_freq
,
423 dev_priv
->vbt
.display_clock_mode
,
424 dev_priv
->vbt
.fdi_rx_polarity_inverted
);
429 parse_general_definitions(struct drm_i915_private
*dev_priv
,
430 struct bdb_header
*bdb
)
432 struct bdb_general_definitions
*general
;
434 general
= find_section(bdb
, BDB_GENERAL_DEFINITIONS
);
436 u16 block_size
= get_blocksize(general
);
437 if (block_size
>= sizeof(*general
)) {
438 int bus_pin
= general
->crt_ddc_gmbus_pin
;
439 DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin
);
440 if (intel_gmbus_is_port_valid(bus_pin
))
441 dev_priv
->vbt
.crt_ddc_pin
= bus_pin
;
443 DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n",
450 parse_sdvo_device_mapping(struct drm_i915_private
*dev_priv
,
451 struct bdb_header
*bdb
)
453 struct sdvo_device_mapping
*p_mapping
;
454 struct bdb_general_definitions
*p_defs
;
455 union child_device_config
*p_child
;
456 int i
, child_device_num
, count
;
459 p_defs
= find_section(bdb
, BDB_GENERAL_DEFINITIONS
);
461 DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n");
464 /* judge whether the size of child device meets the requirements.
465 * If the child device size obtained from general definition block
466 * is different with sizeof(struct child_device_config), skip the
467 * parsing of sdvo device info
469 if (p_defs
->child_dev_size
!= sizeof(*p_child
)) {
470 /* different child dev size . Ignore it */
471 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
474 /* get the block size of general definitions */
475 block_size
= get_blocksize(p_defs
);
476 /* get the number of child device */
477 child_device_num
= (block_size
- sizeof(*p_defs
)) /
480 for (i
= 0; i
< child_device_num
; i
++) {
481 p_child
= &(p_defs
->devices
[i
]);
482 if (!p_child
->old
.device_type
) {
483 /* skip the device block if device type is invalid */
486 if (p_child
->old
.slave_addr
!= SLAVE_ADDR1
&&
487 p_child
->old
.slave_addr
!= SLAVE_ADDR2
) {
489 * If the slave address is neither 0x70 nor 0x72,
490 * it is not a SDVO device. Skip it.
494 if (p_child
->old
.dvo_port
!= DEVICE_PORT_DVOB
&&
495 p_child
->old
.dvo_port
!= DEVICE_PORT_DVOC
) {
496 /* skip the incorrect SDVO port */
497 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n");
500 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
502 p_child
->old
.slave_addr
,
503 (p_child
->old
.dvo_port
== DEVICE_PORT_DVOB
) ?
505 p_mapping
= &(dev_priv
->sdvo_mappings
[p_child
->old
.dvo_port
- 1]);
506 if (!p_mapping
->initialized
) {
507 p_mapping
->dvo_port
= p_child
->old
.dvo_port
;
508 p_mapping
->slave_addr
= p_child
->old
.slave_addr
;
509 p_mapping
->dvo_wiring
= p_child
->old
.dvo_wiring
;
510 p_mapping
->ddc_pin
= p_child
->old
.ddc_pin
;
511 p_mapping
->i2c_pin
= p_child
->old
.i2c_pin
;
512 p_mapping
->initialized
= 1;
513 DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
515 p_mapping
->slave_addr
,
516 p_mapping
->dvo_wiring
,
520 DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
521 "two SDVO device.\n");
523 if (p_child
->old
.slave2_addr
) {
524 /* Maybe this is a SDVO device with multiple inputs */
525 /* And the mapping info is not added */
526 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
527 " is a SDVO device with multiple inputs.\n");
533 /* No SDVO device info is found */
534 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
540 parse_driver_features(struct drm_i915_private
*dev_priv
,
541 struct bdb_header
*bdb
)
543 struct bdb_driver_features
*driver
;
545 driver
= find_section(bdb
, BDB_DRIVER_FEATURES
);
549 if (driver
->lvds_config
== BDB_DRIVER_FEATURE_EDP
)
550 dev_priv
->vbt
.edp_support
= 1;
552 if (driver
->dual_frequency
)
553 dev_priv
->render_reclock_avail
= true;
555 DRM_DEBUG_KMS("DRRS State Enabled:%d\n", driver
->drrs_enabled
);
557 * If DRRS is not supported, drrs_type has to be set to 0.
558 * This is because, VBT is configured in such a way that
559 * static DRRS is 0 and DRRS not supported is represented by
560 * driver->drrs_enabled=false
562 if (!driver
->drrs_enabled
)
563 dev_priv
->vbt
.drrs_type
= DRRS_NOT_SUPPORTED
;
567 parse_edp(struct drm_i915_private
*dev_priv
, struct bdb_header
*bdb
)
570 struct edp_power_seq
*edp_pps
;
571 struct edp_link_params
*edp_link_params
;
573 edp
= find_section(bdb
, BDB_EDP
);
575 if (dev_priv
->vbt
.edp_support
)
576 DRM_DEBUG_KMS("No eDP BDB found but eDP panel supported.\n");
580 switch ((edp
->color_depth
>> (panel_type
* 2)) & 3) {
582 dev_priv
->vbt
.edp_bpp
= 18;
585 dev_priv
->vbt
.edp_bpp
= 24;
588 dev_priv
->vbt
.edp_bpp
= 30;
592 /* Get the eDP sequencing and link info */
593 edp_pps
= &edp
->power_seqs
[panel_type
];
594 edp_link_params
= &edp
->link_params
[panel_type
];
596 dev_priv
->vbt
.edp_pps
= *edp_pps
;
598 switch (edp_link_params
->rate
) {
600 dev_priv
->vbt
.edp_rate
= DP_LINK_BW_1_62
;
603 dev_priv
->vbt
.edp_rate
= DP_LINK_BW_2_7
;
606 DRM_DEBUG_KMS("VBT has unknown eDP link rate value %u\n",
607 edp_link_params
->rate
);
611 switch (edp_link_params
->lanes
) {
613 dev_priv
->vbt
.edp_lanes
= 1;
616 dev_priv
->vbt
.edp_lanes
= 2;
619 dev_priv
->vbt
.edp_lanes
= 4;
622 DRM_DEBUG_KMS("VBT has unknown eDP lane count value %u\n",
623 edp_link_params
->lanes
);
627 switch (edp_link_params
->preemphasis
) {
628 case EDP_PREEMPHASIS_NONE
:
629 dev_priv
->vbt
.edp_preemphasis
= DP_TRAIN_PRE_EMPHASIS_0
;
631 case EDP_PREEMPHASIS_3_5dB
:
632 dev_priv
->vbt
.edp_preemphasis
= DP_TRAIN_PRE_EMPHASIS_3_5
;
634 case EDP_PREEMPHASIS_6dB
:
635 dev_priv
->vbt
.edp_preemphasis
= DP_TRAIN_PRE_EMPHASIS_6
;
637 case EDP_PREEMPHASIS_9_5dB
:
638 dev_priv
->vbt
.edp_preemphasis
= DP_TRAIN_PRE_EMPHASIS_9_5
;
641 DRM_DEBUG_KMS("VBT has unknown eDP pre-emphasis value %u\n",
642 edp_link_params
->preemphasis
);
646 switch (edp_link_params
->vswing
) {
647 case EDP_VSWING_0_4V
:
648 dev_priv
->vbt
.edp_vswing
= DP_TRAIN_VOLTAGE_SWING_400
;
650 case EDP_VSWING_0_6V
:
651 dev_priv
->vbt
.edp_vswing
= DP_TRAIN_VOLTAGE_SWING_600
;
653 case EDP_VSWING_0_8V
:
654 dev_priv
->vbt
.edp_vswing
= DP_TRAIN_VOLTAGE_SWING_800
;
656 case EDP_VSWING_1_2V
:
657 dev_priv
->vbt
.edp_vswing
= DP_TRAIN_VOLTAGE_SWING_1200
;
660 DRM_DEBUG_KMS("VBT has unknown eDP voltage swing value %u\n",
661 edp_link_params
->vswing
);
666 static u8
*goto_next_sequence(u8
*data
, int *size
)
674 /* goto first element */
678 case MIPI_SEQ_ELEM_SEND_PKT
:
680 * skip by this element payload size
681 * skip elem id, command flag and data type
688 len
= *((u16
*)data
);
695 data
= data
+ 2 + len
;
697 case MIPI_SEQ_ELEM_DELAY
:
698 /* skip by elem id, and delay is 4 bytes */
705 case MIPI_SEQ_ELEM_GPIO
:
713 DRM_ERROR("Unknown element\n");
717 /* end of sequence ? */
722 /* goto next sequence or end of block byte */
728 /* update amount of data left for the sequence block to be parsed */
734 parse_mipi(struct drm_i915_private
*dev_priv
, struct bdb_header
*bdb
)
736 struct bdb_mipi_config
*start
;
737 struct bdb_mipi_sequence
*sequence
;
738 struct mipi_config
*config
;
739 struct mipi_pps_data
*pps
;
741 int i
, panel_id
, seq_size
;
744 /* parse MIPI blocks only if LFP type is MIPI */
745 if (!dev_priv
->vbt
.has_mipi
)
748 /* Initialize this to undefined indicating no generic MIPI support */
749 dev_priv
->vbt
.dsi
.panel_id
= MIPI_DSI_UNDEFINED_PANEL_ID
;
751 /* Block #40 is already parsed and panel_fixed_mode is
752 * stored in dev_priv->lfp_lvds_vbt_mode
753 * resuse this when needed
756 /* Parse #52 for panel index used from panel_type already
759 start
= find_section(bdb
, BDB_MIPI_CONFIG
);
761 DRM_DEBUG_KMS("No MIPI config BDB found");
765 DRM_DEBUG_DRIVER("Found MIPI Config block, panel index = %d\n",
769 * get hold of the correct configuration block and pps data as per
770 * the panel_type as index
772 config
= &start
->config
[panel_type
];
773 pps
= &start
->pps
[panel_type
];
775 /* store as of now full data. Trim when we realise all is not needed */
776 dev_priv
->vbt
.dsi
.config
= kmemdup(config
, sizeof(struct mipi_config
), GFP_KERNEL
);
777 if (!dev_priv
->vbt
.dsi
.config
)
780 dev_priv
->vbt
.dsi
.pps
= kmemdup(pps
, sizeof(struct mipi_pps_data
), GFP_KERNEL
);
781 if (!dev_priv
->vbt
.dsi
.pps
) {
782 kfree(dev_priv
->vbt
.dsi
.config
);
786 /* We have mandatory mipi config blocks. Initialize as generic panel */
787 dev_priv
->vbt
.dsi
.panel_id
= MIPI_DSI_GENERIC_PANEL_ID
;
789 /* Check if we have sequence block as well */
790 sequence
= find_section(bdb
, BDB_MIPI_SEQUENCE
);
792 DRM_DEBUG_KMS("No MIPI Sequence found, parsing complete\n");
796 DRM_DEBUG_DRIVER("Found MIPI sequence block\n");
798 block_size
= get_blocksize(sequence
);
801 * parse the sequence block for individual sequences
803 dev_priv
->vbt
.dsi
.seq_version
= sequence
->version
;
805 seq_data
= &sequence
->data
[0];
808 * sequence block is variable length and hence we need to parse and
809 * get the sequence data for specific panel id
811 for (i
= 0; i
< MAX_MIPI_CONFIGURATIONS
; i
++) {
812 panel_id
= *seq_data
;
813 seq_size
= *((u16
*) (seq_data
+ 1));
814 if (panel_id
== panel_type
)
817 /* skip the sequence including seq header of 3 bytes */
818 seq_data
= seq_data
+ 3 + seq_size
;
819 if ((seq_data
- &sequence
->data
[0]) > block_size
) {
820 DRM_ERROR("Sequence start is beyond sequence block size, corrupted sequence block\n");
825 if (i
== MAX_MIPI_CONFIGURATIONS
) {
826 DRM_ERROR("Sequence block detected but no valid configuration\n");
830 /* check if found sequence is completely within the sequence block
831 * just being paranoid */
832 if (seq_size
> block_size
) {
833 DRM_ERROR("Corrupted sequence/size, bailing out\n");
837 /* skip the panel id(1 byte) and seq size(2 bytes) */
838 dev_priv
->vbt
.dsi
.data
= kmemdup(seq_data
+ 3, seq_size
, GFP_KERNEL
);
839 if (!dev_priv
->vbt
.dsi
.data
)
843 * loop into the sequence data and split into multiple sequneces
844 * There are only 5 types of sequences as of now
846 data
= dev_priv
->vbt
.dsi
.data
;
847 dev_priv
->vbt
.dsi
.size
= seq_size
;
849 /* two consecutive 0x00 indicate end of all sequences */
852 if (MIPI_SEQ_MAX
> seq_id
&& seq_id
> MIPI_SEQ_UNDEFINED
) {
853 dev_priv
->vbt
.dsi
.sequence
[seq_id
] = data
;
854 DRM_DEBUG_DRIVER("Found mipi sequence - %d\n", seq_id
);
856 DRM_ERROR("undefined sequence\n");
860 /* partial parsing to skip elements */
861 data
= goto_next_sequence(data
, &seq_size
);
864 DRM_ERROR("Sequence elements going beyond block itself. Sequence block parsing failed\n");
869 break; /* end of sequence reached */
872 DRM_DEBUG_DRIVER("MIPI related vbt parsing complete\n");
875 kfree(dev_priv
->vbt
.dsi
.data
);
876 dev_priv
->vbt
.dsi
.data
= NULL
;
878 /* error during parsing so set all pointers to null
879 * because of partial parsing */
880 memset(dev_priv
->vbt
.dsi
.sequence
, 0, MIPI_SEQ_MAX
);
883 static void parse_ddi_port(struct drm_i915_private
*dev_priv
, enum port port
,
884 struct bdb_header
*bdb
)
886 union child_device_config
*it
, *child
= NULL
;
887 struct ddi_vbt_port_info
*info
= &dev_priv
->vbt
.ddi_port_info
[port
];
888 uint8_t hdmi_level_shift
;
890 bool is_dvi
, is_hdmi
, is_dp
, is_edp
, is_crt
;
892 /* Each DDI port can have more than one value on the "DVO Port" field,
893 * so look for all the possible values for each port and abort if more
894 * than one is found. */
895 int dvo_ports
[][2] = {
896 {DVO_PORT_HDMIA
, DVO_PORT_DPA
},
897 {DVO_PORT_HDMIB
, DVO_PORT_DPB
},
898 {DVO_PORT_HDMIC
, DVO_PORT_DPC
},
899 {DVO_PORT_HDMID
, DVO_PORT_DPD
},
900 {DVO_PORT_CRT
, -1 /* Port E can only be DVO_PORT_CRT */ },
903 /* Find the child device to use, abort if more than one found. */
904 for (i
= 0; i
< dev_priv
->vbt
.child_dev_num
; i
++) {
905 it
= dev_priv
->vbt
.child_dev
+ i
;
907 for (j
= 0; j
< 2; j
++) {
908 if (dvo_ports
[port
][j
] == -1)
911 if (it
->common
.dvo_port
== dvo_ports
[port
][j
]) {
913 DRM_DEBUG_KMS("More than one child device for port %c in VBT.\n",
924 aux_channel
= child
->raw
[25];
926 is_dvi
= child
->common
.device_type
& DEVICE_TYPE_TMDS_DVI_SIGNALING
;
927 is_dp
= child
->common
.device_type
& DEVICE_TYPE_DISPLAYPORT_OUTPUT
;
928 is_crt
= child
->common
.device_type
& DEVICE_TYPE_ANALOG_OUTPUT
;
929 is_hdmi
= is_dvi
&& (child
->common
.device_type
& DEVICE_TYPE_NOT_HDMI_OUTPUT
) == 0;
930 is_edp
= is_dp
&& (child
->common
.device_type
& DEVICE_TYPE_INTERNAL_CONNECTOR
);
932 info
->supports_dvi
= is_dvi
;
933 info
->supports_hdmi
= is_hdmi
;
934 info
->supports_dp
= is_dp
;
936 DRM_DEBUG_KMS("Port %c VBT info: DP:%d HDMI:%d DVI:%d EDP:%d CRT:%d\n",
937 port_name(port
), is_dp
, is_hdmi
, is_dvi
, is_edp
, is_crt
);
939 if (is_edp
&& is_dvi
)
940 DRM_DEBUG_KMS("Internal DP port %c is TMDS compatible\n",
942 if (is_crt
&& port
!= PORT_E
)
943 DRM_DEBUG_KMS("Port %c is analog\n", port_name(port
));
944 if (is_crt
&& (is_dvi
|| is_dp
))
945 DRM_DEBUG_KMS("Analog port %c is also DP or TMDS compatible\n",
947 if (is_dvi
&& (port
== PORT_A
|| port
== PORT_E
))
948 DRM_DEBUG_KMS("Port %c is TMDS compabile\n", port_name(port
));
949 if (!is_dvi
&& !is_dp
&& !is_crt
)
950 DRM_DEBUG_KMS("Port %c is not DP/TMDS/CRT compatible\n",
952 if (is_edp
&& (port
== PORT_B
|| port
== PORT_C
|| port
== PORT_E
))
953 DRM_DEBUG_KMS("Port %c is internal DP\n", port_name(port
));
956 if (child
->common
.ddc_pin
== 0x05 && port
!= PORT_B
)
957 DRM_DEBUG_KMS("Unexpected DDC pin for port B\n");
958 if (child
->common
.ddc_pin
== 0x04 && port
!= PORT_C
)
959 DRM_DEBUG_KMS("Unexpected DDC pin for port C\n");
960 if (child
->common
.ddc_pin
== 0x06 && port
!= PORT_D
)
961 DRM_DEBUG_KMS("Unexpected DDC pin for port D\n");
965 if (aux_channel
== 0x40 && port
!= PORT_A
)
966 DRM_DEBUG_KMS("Unexpected AUX channel for port A\n");
967 if (aux_channel
== 0x10 && port
!= PORT_B
)
968 DRM_DEBUG_KMS("Unexpected AUX channel for port B\n");
969 if (aux_channel
== 0x20 && port
!= PORT_C
)
970 DRM_DEBUG_KMS("Unexpected AUX channel for port C\n");
971 if (aux_channel
== 0x30 && port
!= PORT_D
)
972 DRM_DEBUG_KMS("Unexpected AUX channel for port D\n");
975 if (bdb
->version
>= 158) {
976 /* The VBT HDMI level shift values match the table we have. */
977 hdmi_level_shift
= child
->raw
[7] & 0xF;
978 if (hdmi_level_shift
< 0xC) {
979 DRM_DEBUG_KMS("VBT HDMI level shift for port %c: %d\n",
982 info
->hdmi_level_shift
= hdmi_level_shift
;
987 static void parse_ddi_ports(struct drm_i915_private
*dev_priv
,
988 struct bdb_header
*bdb
)
990 struct drm_device
*dev
= dev_priv
->dev
;
996 if (!dev_priv
->vbt
.child_dev_num
)
999 if (bdb
->version
< 155)
1002 for (port
= PORT_A
; port
< I915_MAX_PORTS
; port
++)
1003 parse_ddi_port(dev_priv
, port
, bdb
);
1007 parse_device_mapping(struct drm_i915_private
*dev_priv
,
1008 struct bdb_header
*bdb
)
1010 struct bdb_general_definitions
*p_defs
;
1011 union child_device_config
*p_child
, *child_dev_ptr
;
1012 int i
, child_device_num
, count
;
1015 p_defs
= find_section(bdb
, BDB_GENERAL_DEFINITIONS
);
1017 DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
1020 /* judge whether the size of child device meets the requirements.
1021 * If the child device size obtained from general definition block
1022 * is different with sizeof(struct child_device_config), skip the
1023 * parsing of sdvo device info
1025 if (p_defs
->child_dev_size
!= sizeof(*p_child
)) {
1026 /* different child dev size . Ignore it */
1027 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
1030 /* get the block size of general definitions */
1031 block_size
= get_blocksize(p_defs
);
1032 /* get the number of child device */
1033 child_device_num
= (block_size
- sizeof(*p_defs
)) /
1036 /* get the number of child device that is present */
1037 for (i
= 0; i
< child_device_num
; i
++) {
1038 p_child
= &(p_defs
->devices
[i
]);
1039 if (!p_child
->common
.device_type
) {
1040 /* skip the device block if device type is invalid */
1046 DRM_DEBUG_KMS("no child dev is parsed from VBT\n");
1049 dev_priv
->vbt
.child_dev
= kcalloc(count
, sizeof(*p_child
), GFP_KERNEL
);
1050 if (!dev_priv
->vbt
.child_dev
) {
1051 DRM_DEBUG_KMS("No memory space for child device\n");
1055 dev_priv
->vbt
.child_dev_num
= count
;
1057 for (i
= 0; i
< child_device_num
; i
++) {
1058 p_child
= &(p_defs
->devices
[i
]);
1059 if (!p_child
->common
.device_type
) {
1060 /* skip the device block if device type is invalid */
1064 if (p_child
->common
.dvo_port
>= DVO_PORT_MIPIA
1065 && p_child
->common
.dvo_port
<= DVO_PORT_MIPID
1066 &&p_child
->common
.device_type
& DEVICE_TYPE_MIPI_OUTPUT
) {
1067 DRM_DEBUG_KMS("Found MIPI as LFP\n");
1068 dev_priv
->vbt
.has_mipi
= 1;
1069 dev_priv
->vbt
.dsi
.port
= p_child
->common
.dvo_port
;
1072 child_dev_ptr
= dev_priv
->vbt
.child_dev
+ count
;
1074 memcpy((void *)child_dev_ptr
, (void *)p_child
,
1081 init_vbt_defaults(struct drm_i915_private
*dev_priv
)
1083 struct drm_device
*dev
= dev_priv
->dev
;
1086 dev_priv
->vbt
.crt_ddc_pin
= GMBUS_PORT_VGADDC
;
1088 /* Default to having backlight */
1089 dev_priv
->vbt
.backlight
.present
= true;
1091 /* LFP panel data */
1092 dev_priv
->vbt
.lvds_dither
= 1;
1093 dev_priv
->vbt
.lvds_vbt
= 0;
1095 /* SDVO panel data */
1096 dev_priv
->vbt
.sdvo_lvds_vbt_mode
= NULL
;
1098 /* general features */
1099 dev_priv
->vbt
.int_tv_support
= 1;
1100 dev_priv
->vbt
.int_crt_support
= 1;
1102 /* Default to using SSC */
1103 dev_priv
->vbt
.lvds_use_ssc
= 1;
1105 * Core/SandyBridge/IvyBridge use alternative (120MHz) reference
1108 dev_priv
->vbt
.lvds_ssc_freq
= intel_bios_ssc_frequency(dev
,
1109 !HAS_PCH_SPLIT(dev
));
1110 DRM_DEBUG_KMS("Set default to SSC at %d kHz\n", dev_priv
->vbt
.lvds_ssc_freq
);
1112 for (port
= PORT_A
; port
< I915_MAX_PORTS
; port
++) {
1113 struct ddi_vbt_port_info
*info
=
1114 &dev_priv
->vbt
.ddi_port_info
[port
];
1116 /* Recommended BSpec default: 800mV 0dB. */
1117 info
->hdmi_level_shift
= 6;
1119 info
->supports_dvi
= (port
!= PORT_A
&& port
!= PORT_E
);
1120 info
->supports_hdmi
= info
->supports_dvi
;
1121 info
->supports_dp
= (port
!= PORT_E
);
1125 static int __init
intel_no_opregion_vbt_callback(const struct dmi_system_id
*id
)
1127 DRM_DEBUG_KMS("Falling back to manually reading VBT from "
1128 "VBIOS ROM for %s\n",
1133 static const struct dmi_system_id intel_no_opregion_vbt
[] = {
1135 .callback
= intel_no_opregion_vbt_callback
,
1136 .ident
= "ThinkCentre A57",
1138 DMI_MATCH(DMI_SYS_VENDOR
, "LENOVO"),
1139 DMI_MATCH(DMI_PRODUCT_NAME
, "97027RG"),
1145 static struct bdb_header
*validate_vbt(char *base
, size_t size
,
1146 struct vbt_header
*vbt
,
1150 struct bdb_header
*bdb
;
1153 DRM_DEBUG_DRIVER("VBT signature missing\n");
1157 offset
= (char *)vbt
- base
;
1158 if (offset
+ sizeof(struct vbt_header
) > size
) {
1159 DRM_DEBUG_DRIVER("VBT header incomplete\n");
1163 if (memcmp(vbt
->signature
, "$VBT", 4)) {
1164 DRM_DEBUG_DRIVER("VBT invalid signature\n");
1168 offset
+= vbt
->bdb_offset
;
1169 if (offset
+ sizeof(struct bdb_header
) > size
) {
1170 DRM_DEBUG_DRIVER("BDB header incomplete\n");
1174 bdb
= (struct bdb_header
*)(base
+ offset
);
1175 if (offset
+ bdb
->bdb_size
> size
) {
1176 DRM_DEBUG_DRIVER("BDB incomplete\n");
1180 DRM_DEBUG_KMS("Using VBT from %s: %20s\n",
1181 source
, vbt
->signature
);
1186 * intel_parse_bios - find VBT and initialize settings from the BIOS
1189 * Loads the Video BIOS and checks that the VBT exists. Sets scratch registers
1190 * to appropriate values.
1192 * Returns 0 on success, nonzero on failure.
1195 intel_parse_bios(struct drm_device
*dev
)
1197 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1198 struct pci_dev
*pdev
= dev
->pdev
;
1199 struct bdb_header
*bdb
= NULL
;
1200 u8 __iomem
*bios
= NULL
;
1202 if (HAS_PCH_NOP(dev
))
1205 init_vbt_defaults(dev_priv
);
1207 /* XXX Should this validation be moved to intel_opregion.c? */
1208 if (!dmi_check_system(intel_no_opregion_vbt
) && dev_priv
->opregion
.vbt
)
1209 bdb
= validate_vbt((char *)dev_priv
->opregion
.header
, OPREGION_SIZE
,
1210 (struct vbt_header
*)dev_priv
->opregion
.vbt
,
1216 bios
= pci_map_rom(pdev
, &size
);
1220 /* Scour memory looking for the VBT signature */
1221 for (i
= 0; i
+ 4 < size
; i
++) {
1222 if (memcmp(bios
+ i
, "$VBT", 4) == 0) {
1223 bdb
= validate_vbt(bios
, size
,
1224 (struct vbt_header
*)(bios
+ i
),
1231 pci_unmap_rom(pdev
, bios
);
1236 /* Grab useful general definitions */
1237 parse_general_features(dev_priv
, bdb
);
1238 parse_general_definitions(dev_priv
, bdb
);
1239 parse_lfp_panel_data(dev_priv
, bdb
);
1240 parse_lfp_backlight(dev_priv
, bdb
);
1241 parse_sdvo_panel_data(dev_priv
, bdb
);
1242 parse_sdvo_device_mapping(dev_priv
, bdb
);
1243 parse_device_mapping(dev_priv
, bdb
);
1244 parse_driver_features(dev_priv
, bdb
);
1245 parse_edp(dev_priv
, bdb
);
1246 parse_mipi(dev_priv
, bdb
);
1247 parse_ddi_ports(dev_priv
, bdb
);
1250 pci_unmap_rom(pdev
, bios
);
1255 /* Ensure that vital registers have been initialised, even if the BIOS
1256 * is absent or just failing to do its job.
1258 void intel_setup_bios(struct drm_device
*dev
)
1260 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1262 /* Set the Panel Power On/Off timings if uninitialized. */
1263 if (!HAS_PCH_SPLIT(dev
) &&
1264 I915_READ(PP_ON_DELAYS
) == 0 && I915_READ(PP_OFF_DELAYS
) == 0) {
1265 /* Set T2 to 40ms and T5 to 200ms */
1266 I915_WRITE(PP_ON_DELAYS
, 0x019007d0);
1268 /* Set T3 to 35ms and Tx to 200ms */
1269 I915_WRITE(PP_OFF_DELAYS
, 0x015e07d0);