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 <drm/drm_dp_helper.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 /* Try to find integrated panel data */
178 parse_lfp_panel_data(struct drm_i915_private
*dev_priv
,
179 struct bdb_header
*bdb
)
181 const struct bdb_lvds_options
*lvds_options
;
182 const struct bdb_lvds_lfp_data
*lvds_lfp_data
;
183 const struct bdb_lvds_lfp_data_ptrs
*lvds_lfp_data_ptrs
;
184 const struct lvds_dvo_timing
*panel_dvo_timing
;
185 struct drm_display_mode
*panel_fixed_mode
;
188 lvds_options
= find_section(bdb
, BDB_LVDS_OPTIONS
);
192 dev_priv
->lvds_dither
= lvds_options
->pixel_dither
;
193 if (lvds_options
->panel_type
== 0xff)
196 panel_type
= lvds_options
->panel_type
;
198 lvds_lfp_data
= find_section(bdb
, BDB_LVDS_LFP_DATA
);
202 lvds_lfp_data_ptrs
= find_section(bdb
, BDB_LVDS_LFP_DATA_PTRS
);
203 if (!lvds_lfp_data_ptrs
)
206 dev_priv
->lvds_vbt
= 1;
208 panel_dvo_timing
= get_lvds_dvo_timing(lvds_lfp_data
,
210 lvds_options
->panel_type
);
212 panel_fixed_mode
= kzalloc(sizeof(*panel_fixed_mode
), GFP_KERNEL
);
213 if (!panel_fixed_mode
)
216 fill_detail_timing_data(panel_fixed_mode
, panel_dvo_timing
);
218 dev_priv
->lfp_lvds_vbt_mode
= panel_fixed_mode
;
220 DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n");
221 drm_mode_debug_printmodeline(panel_fixed_mode
);
224 * Iterate over the LVDS panel timing info to find the lowest clock
225 * for the native resolution.
227 downclock
= panel_dvo_timing
->clock
;
228 for (i
= 0; i
< 16; i
++) {
229 const struct lvds_dvo_timing
*dvo_timing
;
231 dvo_timing
= get_lvds_dvo_timing(lvds_lfp_data
,
234 if (lvds_dvo_timing_equal_size(dvo_timing
, panel_dvo_timing
) &&
235 dvo_timing
->clock
< downclock
)
236 downclock
= dvo_timing
->clock
;
239 if (downclock
< panel_dvo_timing
->clock
&& i915_lvds_downclock
) {
240 dev_priv
->lvds_downclock_avail
= 1;
241 dev_priv
->lvds_downclock
= downclock
* 10;
242 DRM_DEBUG_KMS("LVDS downclock is found in VBT. "
243 "Normal Clock %dKHz, downclock %dKHz\n",
244 panel_fixed_mode
->clock
, 10*downclock
);
248 /* Try to find sdvo panel data */
250 parse_sdvo_panel_data(struct drm_i915_private
*dev_priv
,
251 struct bdb_header
*bdb
)
253 struct lvds_dvo_timing
*dvo_timing
;
254 struct drm_display_mode
*panel_fixed_mode
;
257 index
= i915_vbt_sdvo_panel_type
;
259 struct bdb_sdvo_lvds_options
*sdvo_lvds_options
;
261 sdvo_lvds_options
= find_section(bdb
, BDB_SDVO_LVDS_OPTIONS
);
262 if (!sdvo_lvds_options
)
265 index
= sdvo_lvds_options
->panel_type
;
268 dvo_timing
= find_section(bdb
, BDB_SDVO_PANEL_DTDS
);
272 panel_fixed_mode
= kzalloc(sizeof(*panel_fixed_mode
), GFP_KERNEL
);
273 if (!panel_fixed_mode
)
276 fill_detail_timing_data(panel_fixed_mode
, dvo_timing
+ index
);
278 dev_priv
->sdvo_lvds_vbt_mode
= panel_fixed_mode
;
280 DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n");
281 drm_mode_debug_printmodeline(panel_fixed_mode
);
284 static int intel_bios_ssc_frequency(struct drm_device
*dev
,
287 switch (INTEL_INFO(dev
)->gen
) {
289 return alternate
? 66 : 48;
292 return alternate
? 100 : 96;
294 return alternate
? 100 : 120;
299 parse_general_features(struct drm_i915_private
*dev_priv
,
300 struct bdb_header
*bdb
)
302 struct drm_device
*dev
= dev_priv
->dev
;
303 struct bdb_general_features
*general
;
305 general
= find_section(bdb
, BDB_GENERAL_FEATURES
);
307 dev_priv
->int_tv_support
= general
->int_tv_support
;
308 dev_priv
->int_crt_support
= general
->int_crt_support
;
309 dev_priv
->lvds_use_ssc
= general
->enable_ssc
;
310 dev_priv
->lvds_ssc_freq
=
311 intel_bios_ssc_frequency(dev
, general
->ssc_freq
);
316 parse_general_definitions(struct drm_i915_private
*dev_priv
,
317 struct bdb_header
*bdb
)
319 struct bdb_general_definitions
*general
;
321 general
= find_section(bdb
, BDB_GENERAL_DEFINITIONS
);
323 u16 block_size
= get_blocksize(general
);
324 if (block_size
>= sizeof(*general
)) {
325 int bus_pin
= general
->crt_ddc_gmbus_pin
;
326 DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin
);
327 if (bus_pin
>= 1 && bus_pin
<= 6)
328 dev_priv
->crt_ddc_pin
= bus_pin
;
330 DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n",
337 parse_sdvo_device_mapping(struct drm_i915_private
*dev_priv
,
338 struct bdb_header
*bdb
)
340 struct sdvo_device_mapping
*p_mapping
;
341 struct bdb_general_definitions
*p_defs
;
342 struct child_device_config
*p_child
;
343 int i
, child_device_num
, count
;
346 p_defs
= find_section(bdb
, BDB_GENERAL_DEFINITIONS
);
348 DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n");
351 /* judge whether the size of child device meets the requirements.
352 * If the child device size obtained from general definition block
353 * is different with sizeof(struct child_device_config), skip the
354 * parsing of sdvo device info
356 if (p_defs
->child_dev_size
!= sizeof(*p_child
)) {
357 /* different child dev size . Ignore it */
358 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
361 /* get the block size of general definitions */
362 block_size
= get_blocksize(p_defs
);
363 /* get the number of child device */
364 child_device_num
= (block_size
- sizeof(*p_defs
)) /
367 for (i
= 0; i
< child_device_num
; i
++) {
368 p_child
= &(p_defs
->devices
[i
]);
369 if (!p_child
->device_type
) {
370 /* skip the device block if device type is invalid */
373 if (p_child
->slave_addr
!= SLAVE_ADDR1
&&
374 p_child
->slave_addr
!= SLAVE_ADDR2
) {
376 * If the slave address is neither 0x70 nor 0x72,
377 * it is not a SDVO device. Skip it.
381 if (p_child
->dvo_port
!= DEVICE_PORT_DVOB
&&
382 p_child
->dvo_port
!= DEVICE_PORT_DVOC
) {
383 /* skip the incorrect SDVO port */
384 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it \n");
387 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
390 (p_child
->dvo_port
== DEVICE_PORT_DVOB
) ?
392 p_mapping
= &(dev_priv
->sdvo_mappings
[p_child
->dvo_port
- 1]);
393 if (!p_mapping
->initialized
) {
394 p_mapping
->dvo_port
= p_child
->dvo_port
;
395 p_mapping
->slave_addr
= p_child
->slave_addr
;
396 p_mapping
->dvo_wiring
= p_child
->dvo_wiring
;
397 p_mapping
->ddc_pin
= p_child
->ddc_pin
;
398 p_mapping
->i2c_pin
= p_child
->i2c_pin
;
399 p_mapping
->i2c_speed
= p_child
->i2c_speed
;
400 p_mapping
->initialized
= 1;
401 DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d, i2c_speed=%d\n",
403 p_mapping
->slave_addr
,
404 p_mapping
->dvo_wiring
,
407 p_mapping
->i2c_speed
);
409 DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
410 "two SDVO device.\n");
412 if (p_child
->slave2_addr
) {
413 /* Maybe this is a SDVO device with multiple inputs */
414 /* And the mapping info is not added */
415 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
416 " is a SDVO device with multiple inputs.\n");
422 /* No SDVO device info is found */
423 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
429 parse_driver_features(struct drm_i915_private
*dev_priv
,
430 struct bdb_header
*bdb
)
432 struct drm_device
*dev
= dev_priv
->dev
;
433 struct bdb_driver_features
*driver
;
435 driver
= find_section(bdb
, BDB_DRIVER_FEATURES
);
439 if (SUPPORTS_EDP(dev
) &&
440 driver
->lvds_config
== BDB_DRIVER_FEATURE_EDP
)
441 dev_priv
->edp
.support
= 1;
443 if (driver
->dual_frequency
)
444 dev_priv
->render_reclock_avail
= true;
448 parse_edp(struct drm_i915_private
*dev_priv
, struct bdb_header
*bdb
)
451 struct edp_power_seq
*edp_pps
;
452 struct edp_link_params
*edp_link_params
;
454 edp
= find_section(bdb
, BDB_EDP
);
456 if (SUPPORTS_EDP(dev_priv
->dev
) && dev_priv
->edp
.support
) {
457 DRM_DEBUG_KMS("No eDP BDB found but eDP panel "
458 "supported, assume %dbpp panel color "
465 switch ((edp
->color_depth
>> (panel_type
* 2)) & 3) {
467 dev_priv
->edp
.bpp
= 18;
470 dev_priv
->edp
.bpp
= 24;
473 dev_priv
->edp
.bpp
= 30;
477 /* Get the eDP sequencing and link info */
478 edp_pps
= &edp
->power_seqs
[panel_type
];
479 edp_link_params
= &edp
->link_params
[panel_type
];
481 dev_priv
->edp
.pps
= *edp_pps
;
483 dev_priv
->edp
.rate
= edp_link_params
->rate
? DP_LINK_BW_2_7
:
485 switch (edp_link_params
->lanes
) {
487 dev_priv
->edp
.lanes
= 1;
490 dev_priv
->edp
.lanes
= 2;
494 dev_priv
->edp
.lanes
= 4;
497 switch (edp_link_params
->preemphasis
) {
499 dev_priv
->edp
.preemphasis
= DP_TRAIN_PRE_EMPHASIS_0
;
502 dev_priv
->edp
.preemphasis
= DP_TRAIN_PRE_EMPHASIS_3_5
;
505 dev_priv
->edp
.preemphasis
= DP_TRAIN_PRE_EMPHASIS_6
;
508 dev_priv
->edp
.preemphasis
= DP_TRAIN_PRE_EMPHASIS_9_5
;
511 switch (edp_link_params
->vswing
) {
513 dev_priv
->edp
.vswing
= DP_TRAIN_VOLTAGE_SWING_400
;
516 dev_priv
->edp
.vswing
= DP_TRAIN_VOLTAGE_SWING_600
;
519 dev_priv
->edp
.vswing
= DP_TRAIN_VOLTAGE_SWING_800
;
522 dev_priv
->edp
.vswing
= DP_TRAIN_VOLTAGE_SWING_1200
;
528 parse_device_mapping(struct drm_i915_private
*dev_priv
,
529 struct bdb_header
*bdb
)
531 struct bdb_general_definitions
*p_defs
;
532 struct child_device_config
*p_child
, *child_dev_ptr
;
533 int i
, child_device_num
, count
;
536 p_defs
= find_section(bdb
, BDB_GENERAL_DEFINITIONS
);
538 DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
541 /* judge whether the size of child device meets the requirements.
542 * If the child device size obtained from general definition block
543 * is different with sizeof(struct child_device_config), skip the
544 * parsing of sdvo device info
546 if (p_defs
->child_dev_size
!= sizeof(*p_child
)) {
547 /* different child dev size . Ignore it */
548 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
551 /* get the block size of general definitions */
552 block_size
= get_blocksize(p_defs
);
553 /* get the number of child device */
554 child_device_num
= (block_size
- sizeof(*p_defs
)) /
557 /* get the number of child device that is present */
558 for (i
= 0; i
< child_device_num
; i
++) {
559 p_child
= &(p_defs
->devices
[i
]);
560 if (!p_child
->device_type
) {
561 /* skip the device block if device type is invalid */
567 DRM_DEBUG_KMS("no child dev is parsed from VBT \n");
570 dev_priv
->child_dev
= kzalloc(sizeof(*p_child
) * count
, GFP_KERNEL
);
571 if (!dev_priv
->child_dev
) {
572 DRM_DEBUG_KMS("No memory space for child device\n");
576 dev_priv
->child_dev_num
= count
;
578 for (i
= 0; i
< child_device_num
; i
++) {
579 p_child
= &(p_defs
->devices
[i
]);
580 if (!p_child
->device_type
) {
581 /* skip the device block if device type is invalid */
584 child_dev_ptr
= dev_priv
->child_dev
+ count
;
586 memcpy((void *)child_dev_ptr
, (void *)p_child
,
593 init_vbt_defaults(struct drm_i915_private
*dev_priv
)
595 struct drm_device
*dev
= dev_priv
->dev
;
597 dev_priv
->crt_ddc_pin
= GMBUS_PORT_VGADDC
;
600 dev_priv
->lvds_dither
= 1;
601 dev_priv
->lvds_vbt
= 0;
603 /* SDVO panel data */
604 dev_priv
->sdvo_lvds_vbt_mode
= NULL
;
606 /* general features */
607 dev_priv
->int_tv_support
= 1;
608 dev_priv
->int_crt_support
= 1;
610 /* Default to using SSC */
611 dev_priv
->lvds_use_ssc
= 1;
612 dev_priv
->lvds_ssc_freq
= intel_bios_ssc_frequency(dev
, 1);
613 DRM_DEBUG("Set default to SSC at %dMHz\n", dev_priv
->lvds_ssc_freq
);
616 dev_priv
->edp
.bpp
= 18;
620 * intel_parse_bios - find VBT and initialize settings from the BIOS
623 * Loads the Video BIOS and checks that the VBT exists. Sets scratch registers
624 * to appropriate values.
626 * Returns 0 on success, nonzero on failure.
629 intel_parse_bios(struct drm_device
*dev
)
631 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
632 struct pci_dev
*pdev
= dev
->pdev
;
633 struct bdb_header
*bdb
= NULL
;
634 u8 __iomem
*bios
= NULL
;
636 init_vbt_defaults(dev_priv
);
638 /* XXX Should this validation be moved to intel_opregion.c? */
639 if (dev_priv
->opregion
.vbt
) {
640 struct vbt_header
*vbt
= dev_priv
->opregion
.vbt
;
641 if (memcmp(vbt
->signature
, "$VBT", 4) == 0) {
642 DRM_DEBUG_DRIVER("Using VBT from OpRegion: %20s\n",
644 bdb
= (struct bdb_header
*)((char *)vbt
+ vbt
->bdb_offset
);
646 dev_priv
->opregion
.vbt
= NULL
;
650 struct vbt_header
*vbt
= NULL
;
654 bios
= pci_map_rom(pdev
, &size
);
658 /* Scour memory looking for the VBT signature */
659 for (i
= 0; i
+ 4 < size
; i
++) {
660 if (!memcmp(bios
+ i
, "$VBT", 4)) {
661 vbt
= (struct vbt_header
*)(bios
+ i
);
667 DRM_ERROR("VBT signature missing\n");
668 pci_unmap_rom(pdev
, bios
);
672 bdb
= (struct bdb_header
*)(bios
+ i
+ vbt
->bdb_offset
);
675 /* Grab useful general definitions */
676 parse_general_features(dev_priv
, bdb
);
677 parse_general_definitions(dev_priv
, bdb
);
678 parse_lfp_panel_data(dev_priv
, bdb
);
679 parse_sdvo_panel_data(dev_priv
, bdb
);
680 parse_sdvo_device_mapping(dev_priv
, bdb
);
681 parse_device_mapping(dev_priv
, bdb
);
682 parse_driver_features(dev_priv
, bdb
);
683 parse_edp(dev_priv
, bdb
);
686 pci_unmap_rom(pdev
, bios
);
691 /* Ensure that vital registers have been initialised, even if the BIOS
692 * is absent or just failing to do its job.
694 void intel_setup_bios(struct drm_device
*dev
)
696 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
698 /* Set the Panel Power On/Off timings if uninitialized. */
699 if ((I915_READ(PP_ON_DELAYS
) == 0) && (I915_READ(PP_OFF_DELAYS
) == 0)) {
700 /* Set T2 to 40ms and T5 to 200ms */
701 I915_WRITE(PP_ON_DELAYS
, 0x019007d0);
703 /* Set T3 to 35ms and Tx to 200ms */
704 I915_WRITE(PP_OFF_DELAYS
, 0x015e07d0);