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
< total
) {
53 current_id
= *(base
+ index
);
55 current_size
= *((u16
*)(base
+ index
));
57 if (current_id
== section_id
)
59 index
+= current_size
;
66 get_blocksize(void *p
)
68 u16
*block_ptr
, block_size
;
70 block_ptr
= (u16
*)((char *)p
- 2);
71 block_size
= *block_ptr
;
76 fill_detail_timing_data(struct drm_display_mode
*panel_fixed_mode
,
77 const struct lvds_dvo_timing
*dvo_timing
)
79 panel_fixed_mode
->hdisplay
= (dvo_timing
->hactive_hi
<< 8) |
80 dvo_timing
->hactive_lo
;
81 panel_fixed_mode
->hsync_start
= panel_fixed_mode
->hdisplay
+
82 ((dvo_timing
->hsync_off_hi
<< 8) | dvo_timing
->hsync_off_lo
);
83 panel_fixed_mode
->hsync_end
= panel_fixed_mode
->hsync_start
+
84 dvo_timing
->hsync_pulse_width
;
85 panel_fixed_mode
->htotal
= panel_fixed_mode
->hdisplay
+
86 ((dvo_timing
->hblank_hi
<< 8) | dvo_timing
->hblank_lo
);
88 panel_fixed_mode
->vdisplay
= (dvo_timing
->vactive_hi
<< 8) |
89 dvo_timing
->vactive_lo
;
90 panel_fixed_mode
->vsync_start
= panel_fixed_mode
->vdisplay
+
91 dvo_timing
->vsync_off
;
92 panel_fixed_mode
->vsync_end
= panel_fixed_mode
->vsync_start
+
93 dvo_timing
->vsync_pulse_width
;
94 panel_fixed_mode
->vtotal
= panel_fixed_mode
->vdisplay
+
95 ((dvo_timing
->vblank_hi
<< 8) | dvo_timing
->vblank_lo
);
96 panel_fixed_mode
->clock
= dvo_timing
->clock
* 10;
97 panel_fixed_mode
->type
= DRM_MODE_TYPE_PREFERRED
;
99 if (dvo_timing
->hsync_positive
)
100 panel_fixed_mode
->flags
|= DRM_MODE_FLAG_PHSYNC
;
102 panel_fixed_mode
->flags
|= DRM_MODE_FLAG_NHSYNC
;
104 if (dvo_timing
->vsync_positive
)
105 panel_fixed_mode
->flags
|= DRM_MODE_FLAG_PVSYNC
;
107 panel_fixed_mode
->flags
|= DRM_MODE_FLAG_NVSYNC
;
109 /* Some VBTs have bogus h/vtotal values */
110 if (panel_fixed_mode
->hsync_end
> panel_fixed_mode
->htotal
)
111 panel_fixed_mode
->htotal
= panel_fixed_mode
->hsync_end
+ 1;
112 if (panel_fixed_mode
->vsync_end
> panel_fixed_mode
->vtotal
)
113 panel_fixed_mode
->vtotal
= panel_fixed_mode
->vsync_end
+ 1;
115 drm_mode_set_name(panel_fixed_mode
);
119 lvds_dvo_timing_equal_size(const struct lvds_dvo_timing
*a
,
120 const struct lvds_dvo_timing
*b
)
122 if (a
->hactive_hi
!= b
->hactive_hi
||
123 a
->hactive_lo
!= b
->hactive_lo
)
126 if (a
->hsync_off_hi
!= b
->hsync_off_hi
||
127 a
->hsync_off_lo
!= b
->hsync_off_lo
)
130 if (a
->hsync_pulse_width
!= b
->hsync_pulse_width
)
133 if (a
->hblank_hi
!= b
->hblank_hi
||
134 a
->hblank_lo
!= b
->hblank_lo
)
137 if (a
->vactive_hi
!= b
->vactive_hi
||
138 a
->vactive_lo
!= b
->vactive_lo
)
141 if (a
->vsync_off
!= b
->vsync_off
)
144 if (a
->vsync_pulse_width
!= b
->vsync_pulse_width
)
147 if (a
->vblank_hi
!= b
->vblank_hi
||
148 a
->vblank_lo
!= b
->vblank_lo
)
154 static const struct lvds_dvo_timing
*
155 get_lvds_dvo_timing(const struct bdb_lvds_lfp_data
*lvds_lfp_data
,
156 const struct bdb_lvds_lfp_data_ptrs
*lvds_lfp_data_ptrs
,
160 * the size of fp_timing varies on the different platform.
161 * So calculate the DVO timing relative offset in LVDS data
162 * entry to get the DVO timing entry
166 lvds_lfp_data_ptrs
->ptr
[1].dvo_timing_offset
-
167 lvds_lfp_data_ptrs
->ptr
[0].dvo_timing_offset
;
168 int dvo_timing_offset
=
169 lvds_lfp_data_ptrs
->ptr
[0].dvo_timing_offset
-
170 lvds_lfp_data_ptrs
->ptr
[0].fp_timing_offset
;
171 char *entry
= (char *)lvds_lfp_data
->data
+ lfp_data_size
* index
;
173 return (struct lvds_dvo_timing
*)(entry
+ dvo_timing_offset
);
176 /* get lvds_fp_timing entry
177 * this function may return NULL if the corresponding entry is invalid
179 static const struct lvds_fp_timing
*
180 get_lvds_fp_timing(const struct bdb_header
*bdb
,
181 const struct bdb_lvds_lfp_data
*data
,
182 const struct bdb_lvds_lfp_data_ptrs
*ptrs
,
185 size_t data_ofs
= (const u8
*)data
- (const u8
*)bdb
;
186 u16 data_size
= ((const u16
*)data
)[-1]; /* stored in header */
189 if (index
>= ARRAY_SIZE(ptrs
->ptr
))
191 ofs
= ptrs
->ptr
[index
].fp_timing_offset
;
192 if (ofs
< data_ofs
||
193 ofs
+ sizeof(struct lvds_fp_timing
) > data_ofs
+ data_size
)
195 return (const struct lvds_fp_timing
*)((const u8
*)bdb
+ ofs
);
198 /* Try to find integrated panel data */
200 parse_lfp_panel_data(struct drm_i915_private
*dev_priv
,
201 struct bdb_header
*bdb
)
203 const struct bdb_lvds_options
*lvds_options
;
204 const struct bdb_lvds_lfp_data
*lvds_lfp_data
;
205 const struct bdb_lvds_lfp_data_ptrs
*lvds_lfp_data_ptrs
;
206 const struct lvds_dvo_timing
*panel_dvo_timing
;
207 const struct lvds_fp_timing
*fp_timing
;
208 struct drm_display_mode
*panel_fixed_mode
;
211 lvds_options
= find_section(bdb
, BDB_LVDS_OPTIONS
);
215 dev_priv
->lvds_dither
= lvds_options
->pixel_dither
;
216 if (lvds_options
->panel_type
== 0xff)
219 panel_type
= lvds_options
->panel_type
;
221 lvds_lfp_data
= find_section(bdb
, BDB_LVDS_LFP_DATA
);
225 lvds_lfp_data_ptrs
= find_section(bdb
, BDB_LVDS_LFP_DATA_PTRS
);
226 if (!lvds_lfp_data_ptrs
)
229 dev_priv
->lvds_vbt
= 1;
231 panel_dvo_timing
= get_lvds_dvo_timing(lvds_lfp_data
,
233 lvds_options
->panel_type
);
235 panel_fixed_mode
= kzalloc(sizeof(*panel_fixed_mode
), GFP_KERNEL
);
236 if (!panel_fixed_mode
)
239 fill_detail_timing_data(panel_fixed_mode
, panel_dvo_timing
);
241 dev_priv
->lfp_lvds_vbt_mode
= panel_fixed_mode
;
243 DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n");
244 drm_mode_debug_printmodeline(panel_fixed_mode
);
247 * Iterate over the LVDS panel timing info to find the lowest clock
248 * for the native resolution.
250 downclock
= panel_dvo_timing
->clock
;
251 for (i
= 0; i
< 16; i
++) {
252 const struct lvds_dvo_timing
*dvo_timing
;
254 dvo_timing
= get_lvds_dvo_timing(lvds_lfp_data
,
257 if (lvds_dvo_timing_equal_size(dvo_timing
, panel_dvo_timing
) &&
258 dvo_timing
->clock
< downclock
)
259 downclock
= dvo_timing
->clock
;
262 if (downclock
< panel_dvo_timing
->clock
&& i915_lvds_downclock
) {
263 dev_priv
->lvds_downclock_avail
= 1;
264 dev_priv
->lvds_downclock
= downclock
* 10;
265 DRM_DEBUG_KMS("LVDS downclock is found in VBT. "
266 "Normal Clock %dKHz, downclock %dKHz\n",
267 panel_fixed_mode
->clock
, 10*downclock
);
270 fp_timing
= get_lvds_fp_timing(bdb
, lvds_lfp_data
,
272 lvds_options
->panel_type
);
274 /* check the resolution, just to be sure */
275 if (fp_timing
->x_res
== panel_fixed_mode
->hdisplay
&&
276 fp_timing
->y_res
== panel_fixed_mode
->vdisplay
) {
277 dev_priv
->bios_lvds_val
= fp_timing
->lvds_reg_val
;
278 DRM_DEBUG_KMS("VBT initial LVDS value %x\n",
279 dev_priv
->bios_lvds_val
);
284 /* Try to find sdvo panel data */
286 parse_sdvo_panel_data(struct drm_i915_private
*dev_priv
,
287 struct bdb_header
*bdb
)
289 struct lvds_dvo_timing
*dvo_timing
;
290 struct drm_display_mode
*panel_fixed_mode
;
293 index
= i915_vbt_sdvo_panel_type
;
295 DRM_DEBUG_KMS("Ignore SDVO panel mode from BIOS VBT tables.\n");
300 struct bdb_sdvo_lvds_options
*sdvo_lvds_options
;
302 sdvo_lvds_options
= find_section(bdb
, BDB_SDVO_LVDS_OPTIONS
);
303 if (!sdvo_lvds_options
)
306 index
= sdvo_lvds_options
->panel_type
;
309 dvo_timing
= find_section(bdb
, BDB_SDVO_PANEL_DTDS
);
313 panel_fixed_mode
= kzalloc(sizeof(*panel_fixed_mode
), GFP_KERNEL
);
314 if (!panel_fixed_mode
)
317 fill_detail_timing_data(panel_fixed_mode
, dvo_timing
+ index
);
319 dev_priv
->sdvo_lvds_vbt_mode
= panel_fixed_mode
;
321 DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n");
322 drm_mode_debug_printmodeline(panel_fixed_mode
);
325 static int intel_bios_ssc_frequency(struct drm_device
*dev
,
328 switch (INTEL_INFO(dev
)->gen
) {
330 return alternate
? 66 : 48;
333 return alternate
? 100 : 96;
335 return alternate
? 100 : 120;
340 parse_general_features(struct drm_i915_private
*dev_priv
,
341 struct bdb_header
*bdb
)
343 struct drm_device
*dev
= dev_priv
->dev
;
344 struct bdb_general_features
*general
;
346 general
= find_section(bdb
, BDB_GENERAL_FEATURES
);
348 dev_priv
->int_tv_support
= general
->int_tv_support
;
349 dev_priv
->int_crt_support
= general
->int_crt_support
;
350 dev_priv
->lvds_use_ssc
= general
->enable_ssc
;
351 dev_priv
->lvds_ssc_freq
=
352 intel_bios_ssc_frequency(dev
, general
->ssc_freq
);
353 dev_priv
->display_clock_mode
= general
->display_clock_mode
;
354 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\n",
355 dev_priv
->int_tv_support
,
356 dev_priv
->int_crt_support
,
357 dev_priv
->lvds_use_ssc
,
358 dev_priv
->lvds_ssc_freq
,
359 dev_priv
->display_clock_mode
);
364 parse_general_definitions(struct drm_i915_private
*dev_priv
,
365 struct bdb_header
*bdb
)
367 struct bdb_general_definitions
*general
;
369 general
= find_section(bdb
, BDB_GENERAL_DEFINITIONS
);
371 u16 block_size
= get_blocksize(general
);
372 if (block_size
>= sizeof(*general
)) {
373 int bus_pin
= general
->crt_ddc_gmbus_pin
;
374 DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin
);
375 if (intel_gmbus_is_port_valid(bus_pin
))
376 dev_priv
->crt_ddc_pin
= bus_pin
;
378 DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n",
385 parse_sdvo_device_mapping(struct drm_i915_private
*dev_priv
,
386 struct bdb_header
*bdb
)
388 struct sdvo_device_mapping
*p_mapping
;
389 struct bdb_general_definitions
*p_defs
;
390 struct child_device_config
*p_child
;
391 int i
, child_device_num
, count
;
394 p_defs
= find_section(bdb
, BDB_GENERAL_DEFINITIONS
);
396 DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n");
399 /* judge whether the size of child device meets the requirements.
400 * If the child device size obtained from general definition block
401 * is different with sizeof(struct child_device_config), skip the
402 * parsing of sdvo device info
404 if (p_defs
->child_dev_size
!= sizeof(*p_child
)) {
405 /* different child dev size . Ignore it */
406 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
409 /* get the block size of general definitions */
410 block_size
= get_blocksize(p_defs
);
411 /* get the number of child device */
412 child_device_num
= (block_size
- sizeof(*p_defs
)) /
415 for (i
= 0; i
< child_device_num
; i
++) {
416 p_child
= &(p_defs
->devices
[i
]);
417 if (!p_child
->device_type
) {
418 /* skip the device block if device type is invalid */
421 if (p_child
->slave_addr
!= SLAVE_ADDR1
&&
422 p_child
->slave_addr
!= SLAVE_ADDR2
) {
424 * If the slave address is neither 0x70 nor 0x72,
425 * it is not a SDVO device. Skip it.
429 if (p_child
->dvo_port
!= DEVICE_PORT_DVOB
&&
430 p_child
->dvo_port
!= DEVICE_PORT_DVOC
) {
431 /* skip the incorrect SDVO port */
432 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n");
435 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
438 (p_child
->dvo_port
== DEVICE_PORT_DVOB
) ?
440 p_mapping
= &(dev_priv
->sdvo_mappings
[p_child
->dvo_port
- 1]);
441 if (!p_mapping
->initialized
) {
442 p_mapping
->dvo_port
= p_child
->dvo_port
;
443 p_mapping
->slave_addr
= p_child
->slave_addr
;
444 p_mapping
->dvo_wiring
= p_child
->dvo_wiring
;
445 p_mapping
->ddc_pin
= p_child
->ddc_pin
;
446 p_mapping
->i2c_pin
= p_child
->i2c_pin
;
447 p_mapping
->initialized
= 1;
448 DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
450 p_mapping
->slave_addr
,
451 p_mapping
->dvo_wiring
,
455 DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
456 "two SDVO device.\n");
458 if (p_child
->slave2_addr
) {
459 /* Maybe this is a SDVO device with multiple inputs */
460 /* And the mapping info is not added */
461 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
462 " is a SDVO device with multiple inputs.\n");
468 /* No SDVO device info is found */
469 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
475 parse_driver_features(struct drm_i915_private
*dev_priv
,
476 struct bdb_header
*bdb
)
478 struct drm_device
*dev
= dev_priv
->dev
;
479 struct bdb_driver_features
*driver
;
481 driver
= find_section(bdb
, BDB_DRIVER_FEATURES
);
485 if (SUPPORTS_EDP(dev
) &&
486 driver
->lvds_config
== BDB_DRIVER_FEATURE_EDP
)
487 dev_priv
->edp
.support
= 1;
489 if (driver
->dual_frequency
)
490 dev_priv
->render_reclock_avail
= true;
494 parse_edp(struct drm_i915_private
*dev_priv
, struct bdb_header
*bdb
)
497 struct edp_power_seq
*edp_pps
;
498 struct edp_link_params
*edp_link_params
;
500 edp
= find_section(bdb
, BDB_EDP
);
502 if (SUPPORTS_EDP(dev_priv
->dev
) && dev_priv
->edp
.support
) {
503 DRM_DEBUG_KMS("No eDP BDB found but eDP panel "
504 "supported, assume %dbpp panel color "
511 switch ((edp
->color_depth
>> (panel_type
* 2)) & 3) {
513 dev_priv
->edp
.bpp
= 18;
516 dev_priv
->edp
.bpp
= 24;
519 dev_priv
->edp
.bpp
= 30;
523 /* Get the eDP sequencing and link info */
524 edp_pps
= &edp
->power_seqs
[panel_type
];
525 edp_link_params
= &edp
->link_params
[panel_type
];
527 dev_priv
->edp
.pps
= *edp_pps
;
529 dev_priv
->edp
.rate
= edp_link_params
->rate
? DP_LINK_BW_2_7
:
531 switch (edp_link_params
->lanes
) {
533 dev_priv
->edp
.lanes
= 1;
536 dev_priv
->edp
.lanes
= 2;
540 dev_priv
->edp
.lanes
= 4;
543 switch (edp_link_params
->preemphasis
) {
545 dev_priv
->edp
.preemphasis
= DP_TRAIN_PRE_EMPHASIS_0
;
548 dev_priv
->edp
.preemphasis
= DP_TRAIN_PRE_EMPHASIS_3_5
;
551 dev_priv
->edp
.preemphasis
= DP_TRAIN_PRE_EMPHASIS_6
;
554 dev_priv
->edp
.preemphasis
= DP_TRAIN_PRE_EMPHASIS_9_5
;
557 switch (edp_link_params
->vswing
) {
559 dev_priv
->edp
.vswing
= DP_TRAIN_VOLTAGE_SWING_400
;
562 dev_priv
->edp
.vswing
= DP_TRAIN_VOLTAGE_SWING_600
;
565 dev_priv
->edp
.vswing
= DP_TRAIN_VOLTAGE_SWING_800
;
568 dev_priv
->edp
.vswing
= DP_TRAIN_VOLTAGE_SWING_1200
;
574 parse_device_mapping(struct drm_i915_private
*dev_priv
,
575 struct bdb_header
*bdb
)
577 struct bdb_general_definitions
*p_defs
;
578 struct child_device_config
*p_child
, *child_dev_ptr
;
579 int i
, child_device_num
, count
;
582 p_defs
= find_section(bdb
, BDB_GENERAL_DEFINITIONS
);
584 DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
587 /* judge whether the size of child device meets the requirements.
588 * If the child device size obtained from general definition block
589 * is different with sizeof(struct child_device_config), skip the
590 * parsing of sdvo device info
592 if (p_defs
->child_dev_size
!= sizeof(*p_child
)) {
593 /* different child dev size . Ignore it */
594 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
597 /* get the block size of general definitions */
598 block_size
= get_blocksize(p_defs
);
599 /* get the number of child device */
600 child_device_num
= (block_size
- sizeof(*p_defs
)) /
603 /* get the number of child device that is present */
604 for (i
= 0; i
< child_device_num
; i
++) {
605 p_child
= &(p_defs
->devices
[i
]);
606 if (!p_child
->device_type
) {
607 /* skip the device block if device type is invalid */
613 DRM_DEBUG_KMS("no child dev is parsed from VBT\n");
616 dev_priv
->child_dev
= kcalloc(count
, sizeof(*p_child
), GFP_KERNEL
);
617 if (!dev_priv
->child_dev
) {
618 DRM_DEBUG_KMS("No memory space for child device\n");
622 dev_priv
->child_dev_num
= count
;
624 for (i
= 0; i
< child_device_num
; i
++) {
625 p_child
= &(p_defs
->devices
[i
]);
626 if (!p_child
->device_type
) {
627 /* skip the device block if device type is invalid */
630 child_dev_ptr
= dev_priv
->child_dev
+ count
;
632 memcpy((void *)child_dev_ptr
, (void *)p_child
,
639 init_vbt_defaults(struct drm_i915_private
*dev_priv
)
641 struct drm_device
*dev
= dev_priv
->dev
;
643 dev_priv
->crt_ddc_pin
= GMBUS_PORT_VGADDC
;
646 dev_priv
->lvds_dither
= 1;
647 dev_priv
->lvds_vbt
= 0;
649 /* SDVO panel data */
650 dev_priv
->sdvo_lvds_vbt_mode
= NULL
;
652 /* general features */
653 dev_priv
->int_tv_support
= 1;
654 dev_priv
->int_crt_support
= 1;
656 /* Default to using SSC */
657 dev_priv
->lvds_use_ssc
= 1;
658 dev_priv
->lvds_ssc_freq
= intel_bios_ssc_frequency(dev
, 1);
659 DRM_DEBUG_KMS("Set default to SSC at %dMHz\n", dev_priv
->lvds_ssc_freq
);
662 dev_priv
->edp
.bpp
= 18;
665 static int __init
intel_no_opregion_vbt_callback(const struct dmi_system_id
*id
)
667 DRM_DEBUG_KMS("Falling back to manually reading VBT from "
668 "VBIOS ROM for %s\n",
673 static const struct dmi_system_id intel_no_opregion_vbt
[] = {
675 .callback
= intel_no_opregion_vbt_callback
,
676 .ident
= "ThinkCentre A57",
678 DMI_MATCH(DMI_SYS_VENDOR
, "LENOVO"),
679 DMI_MATCH(DMI_PRODUCT_NAME
, "97027RG"),
686 * intel_parse_bios - find VBT and initialize settings from the BIOS
689 * Loads the Video BIOS and checks that the VBT exists. Sets scratch registers
690 * to appropriate values.
692 * Returns 0 on success, nonzero on failure.
695 intel_parse_bios(struct drm_device
*dev
)
697 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
698 struct pci_dev
*pdev
= dev
->pdev
;
699 struct bdb_header
*bdb
= NULL
;
700 u8 __iomem
*bios
= NULL
;
702 init_vbt_defaults(dev_priv
);
704 /* XXX Should this validation be moved to intel_opregion.c? */
705 if (!dmi_check_system(intel_no_opregion_vbt
) && dev_priv
->opregion
.vbt
) {
706 struct vbt_header
*vbt
= dev_priv
->opregion
.vbt
;
707 if (memcmp(vbt
->signature
, "$VBT", 4) == 0) {
708 DRM_DEBUG_KMS("Using VBT from OpRegion: %20s\n",
710 bdb
= (struct bdb_header
*)((char *)vbt
+ vbt
->bdb_offset
);
712 dev_priv
->opregion
.vbt
= NULL
;
716 struct vbt_header
*vbt
= NULL
;
720 bios
= pci_map_rom(pdev
, &size
);
724 /* Scour memory looking for the VBT signature */
725 for (i
= 0; i
+ 4 < size
; i
++) {
726 if (!memcmp(bios
+ i
, "$VBT", 4)) {
727 vbt
= (struct vbt_header
*)(bios
+ i
);
733 DRM_DEBUG_DRIVER("VBT signature missing\n");
734 pci_unmap_rom(pdev
, bios
);
738 bdb
= (struct bdb_header
*)(bios
+ i
+ vbt
->bdb_offset
);
741 /* Grab useful general definitions */
742 parse_general_features(dev_priv
, bdb
);
743 parse_general_definitions(dev_priv
, bdb
);
744 parse_lfp_panel_data(dev_priv
, bdb
);
745 parse_sdvo_panel_data(dev_priv
, bdb
);
746 parse_sdvo_device_mapping(dev_priv
, bdb
);
747 parse_device_mapping(dev_priv
, bdb
);
748 parse_driver_features(dev_priv
, bdb
);
749 parse_edp(dev_priv
, bdb
);
752 pci_unmap_rom(pdev
, bios
);
757 /* Ensure that vital registers have been initialised, even if the BIOS
758 * is absent or just failing to do its job.
760 void intel_setup_bios(struct drm_device
*dev
)
762 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
764 /* Set the Panel Power On/Off timings if uninitialized. */
765 if ((I915_READ(PP_ON_DELAYS
) == 0) && (I915_READ(PP_OFF_DELAYS
) == 0)) {
766 /* Set T2 to 40ms and T5 to 200ms */
767 I915_WRITE(PP_ON_DELAYS
, 0x019007d0);
769 /* Set T3 to 35ms and Tx to 200ms */
770 I915_WRITE(PP_OFF_DELAYS
, 0x015e07d0);