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 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
);
118 /* Try to find integrated panel data */
120 parse_lfp_panel_data(struct drm_i915_private
*dev_priv
,
121 struct bdb_header
*bdb
)
123 struct bdb_lvds_options
*lvds_options
;
124 struct bdb_lvds_lfp_data
*lvds_lfp_data
;
125 struct bdb_lvds_lfp_data_ptrs
*lvds_lfp_data_ptrs
;
126 struct bdb_lvds_lfp_data_entry
*entry
;
127 struct lvds_dvo_timing
*dvo_timing
;
128 struct drm_display_mode
*panel_fixed_mode
;
129 int lfp_data_size
, dvo_timing_offset
;
130 int i
, temp_downclock
;
131 struct drm_display_mode
*temp_mode
;
133 lvds_options
= find_section(bdb
, BDB_LVDS_OPTIONS
);
137 dev_priv
->lvds_dither
= lvds_options
->pixel_dither
;
138 if (lvds_options
->panel_type
== 0xff)
141 panel_type
= lvds_options
->panel_type
;
143 lvds_lfp_data
= find_section(bdb
, BDB_LVDS_LFP_DATA
);
147 lvds_lfp_data_ptrs
= find_section(bdb
, BDB_LVDS_LFP_DATA_PTRS
);
148 if (!lvds_lfp_data_ptrs
)
151 dev_priv
->lvds_vbt
= 1;
153 lfp_data_size
= lvds_lfp_data_ptrs
->ptr
[1].dvo_timing_offset
-
154 lvds_lfp_data_ptrs
->ptr
[0].dvo_timing_offset
;
155 entry
= (struct bdb_lvds_lfp_data_entry
*)
156 ((uint8_t *)lvds_lfp_data
->data
+ (lfp_data_size
*
157 lvds_options
->panel_type
));
158 dvo_timing_offset
= lvds_lfp_data_ptrs
->ptr
[0].dvo_timing_offset
-
159 lvds_lfp_data_ptrs
->ptr
[0].fp_timing_offset
;
162 * the size of fp_timing varies on the different platform.
163 * So calculate the DVO timing relative offset in LVDS data
164 * entry to get the DVO timing entry
166 dvo_timing
= (struct lvds_dvo_timing
*)
167 ((unsigned char *)entry
+ dvo_timing_offset
);
169 panel_fixed_mode
= kzalloc(sizeof(*panel_fixed_mode
), GFP_KERNEL
);
170 if (!panel_fixed_mode
)
173 fill_detail_timing_data(panel_fixed_mode
, dvo_timing
);
175 dev_priv
->lfp_lvds_vbt_mode
= panel_fixed_mode
;
177 DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n");
178 drm_mode_debug_printmodeline(panel_fixed_mode
);
180 temp_mode
= kzalloc(sizeof(*temp_mode
), GFP_KERNEL
);
181 temp_downclock
= panel_fixed_mode
->clock
;
183 * enumerate the LVDS panel timing info entry in VBT to check whether
184 * the LVDS downclock is found.
186 for (i
= 0; i
< 16; i
++) {
187 entry
= (struct bdb_lvds_lfp_data_entry
*)
188 ((uint8_t *)lvds_lfp_data
->data
+ (lfp_data_size
* i
));
189 dvo_timing
= (struct lvds_dvo_timing
*)
190 ((unsigned char *)entry
+ dvo_timing_offset
);
192 fill_detail_timing_data(temp_mode
, dvo_timing
);
194 if (temp_mode
->hdisplay
== panel_fixed_mode
->hdisplay
&&
195 temp_mode
->hsync_start
== panel_fixed_mode
->hsync_start
&&
196 temp_mode
->hsync_end
== panel_fixed_mode
->hsync_end
&&
197 temp_mode
->htotal
== panel_fixed_mode
->htotal
&&
198 temp_mode
->vdisplay
== panel_fixed_mode
->vdisplay
&&
199 temp_mode
->vsync_start
== panel_fixed_mode
->vsync_start
&&
200 temp_mode
->vsync_end
== panel_fixed_mode
->vsync_end
&&
201 temp_mode
->vtotal
== panel_fixed_mode
->vtotal
&&
202 temp_mode
->clock
< temp_downclock
) {
204 * downclock is already found. But we expect
205 * to find the lower downclock.
207 temp_downclock
= temp_mode
->clock
;
209 /* clear it to zero */
210 memset(temp_mode
, 0, sizeof(*temp_mode
));
213 if (temp_downclock
< panel_fixed_mode
->clock
&&
214 i915_lvds_downclock
) {
215 dev_priv
->lvds_downclock_avail
= 1;
216 dev_priv
->lvds_downclock
= temp_downclock
;
217 DRM_DEBUG_KMS("LVDS downclock is found in VBT. "
218 "Normal Clock %dKHz, downclock %dKHz\n",
219 temp_downclock
, panel_fixed_mode
->clock
);
224 /* Try to find sdvo panel data */
226 parse_sdvo_panel_data(struct drm_i915_private
*dev_priv
,
227 struct bdb_header
*bdb
)
229 struct lvds_dvo_timing
*dvo_timing
;
230 struct drm_display_mode
*panel_fixed_mode
;
233 index
= i915_vbt_sdvo_panel_type
;
235 struct bdb_sdvo_lvds_options
*sdvo_lvds_options
;
237 sdvo_lvds_options
= find_section(bdb
, BDB_SDVO_LVDS_OPTIONS
);
238 if (!sdvo_lvds_options
)
241 index
= sdvo_lvds_options
->panel_type
;
244 dvo_timing
= find_section(bdb
, BDB_SDVO_PANEL_DTDS
);
248 panel_fixed_mode
= kzalloc(sizeof(*panel_fixed_mode
), GFP_KERNEL
);
249 if (!panel_fixed_mode
)
252 fill_detail_timing_data(panel_fixed_mode
, dvo_timing
+ index
);
254 dev_priv
->sdvo_lvds_vbt_mode
= panel_fixed_mode
;
256 DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n");
257 drm_mode_debug_printmodeline(panel_fixed_mode
);
260 static int intel_bios_ssc_frequency(struct drm_device
*dev
,
263 switch (INTEL_INFO(dev
)->gen
) {
265 return alternate
? 66 : 48;
268 return alternate
? 100 : 96;
270 return alternate
? 100 : 120;
275 parse_general_features(struct drm_i915_private
*dev_priv
,
276 struct bdb_header
*bdb
)
278 struct drm_device
*dev
= dev_priv
->dev
;
279 struct bdb_general_features
*general
;
281 general
= find_section(bdb
, BDB_GENERAL_FEATURES
);
283 dev_priv
->int_tv_support
= general
->int_tv_support
;
284 dev_priv
->int_crt_support
= general
->int_crt_support
;
285 dev_priv
->lvds_use_ssc
= general
->enable_ssc
;
286 dev_priv
->lvds_ssc_freq
=
287 intel_bios_ssc_frequency(dev
, general
->ssc_freq
);
292 parse_general_definitions(struct drm_i915_private
*dev_priv
,
293 struct bdb_header
*bdb
)
295 struct bdb_general_definitions
*general
;
297 general
= find_section(bdb
, BDB_GENERAL_DEFINITIONS
);
299 u16 block_size
= get_blocksize(general
);
300 if (block_size
>= sizeof(*general
)) {
301 int bus_pin
= general
->crt_ddc_gmbus_pin
;
302 DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin
);
303 if (bus_pin
>= 1 && bus_pin
<= 6)
304 dev_priv
->crt_ddc_pin
= bus_pin
;
306 DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n",
313 parse_sdvo_device_mapping(struct drm_i915_private
*dev_priv
,
314 struct bdb_header
*bdb
)
316 struct sdvo_device_mapping
*p_mapping
;
317 struct bdb_general_definitions
*p_defs
;
318 struct child_device_config
*p_child
;
319 int i
, child_device_num
, count
;
322 p_defs
= find_section(bdb
, BDB_GENERAL_DEFINITIONS
);
324 DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n");
327 /* judge whether the size of child device meets the requirements.
328 * If the child device size obtained from general definition block
329 * is different with sizeof(struct child_device_config), skip the
330 * parsing of sdvo device info
332 if (p_defs
->child_dev_size
!= sizeof(*p_child
)) {
333 /* different child dev size . Ignore it */
334 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
337 /* get the block size of general definitions */
338 block_size
= get_blocksize(p_defs
);
339 /* get the number of child device */
340 child_device_num
= (block_size
- sizeof(*p_defs
)) /
343 for (i
= 0; i
< child_device_num
; i
++) {
344 p_child
= &(p_defs
->devices
[i
]);
345 if (!p_child
->device_type
) {
346 /* skip the device block if device type is invalid */
349 if (p_child
->slave_addr
!= SLAVE_ADDR1
&&
350 p_child
->slave_addr
!= SLAVE_ADDR2
) {
352 * If the slave address is neither 0x70 nor 0x72,
353 * it is not a SDVO device. Skip it.
357 if (p_child
->dvo_port
!= DEVICE_PORT_DVOB
&&
358 p_child
->dvo_port
!= DEVICE_PORT_DVOC
) {
359 /* skip the incorrect SDVO port */
360 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it \n");
363 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
366 (p_child
->dvo_port
== DEVICE_PORT_DVOB
) ?
368 p_mapping
= &(dev_priv
->sdvo_mappings
[p_child
->dvo_port
- 1]);
369 if (!p_mapping
->initialized
) {
370 p_mapping
->dvo_port
= p_child
->dvo_port
;
371 p_mapping
->slave_addr
= p_child
->slave_addr
;
372 p_mapping
->dvo_wiring
= p_child
->dvo_wiring
;
373 p_mapping
->ddc_pin
= p_child
->ddc_pin
;
374 p_mapping
->i2c_pin
= p_child
->i2c_pin
;
375 p_mapping
->i2c_speed
= p_child
->i2c_speed
;
376 p_mapping
->initialized
= 1;
377 DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d, i2c_speed=%d\n",
379 p_mapping
->slave_addr
,
380 p_mapping
->dvo_wiring
,
383 p_mapping
->i2c_speed
);
385 DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
386 "two SDVO device.\n");
388 if (p_child
->slave2_addr
) {
389 /* Maybe this is a SDVO device with multiple inputs */
390 /* And the mapping info is not added */
391 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
392 " is a SDVO device with multiple inputs.\n");
398 /* No SDVO device info is found */
399 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
405 parse_driver_features(struct drm_i915_private
*dev_priv
,
406 struct bdb_header
*bdb
)
408 struct drm_device
*dev
= dev_priv
->dev
;
409 struct bdb_driver_features
*driver
;
411 driver
= find_section(bdb
, BDB_DRIVER_FEATURES
);
415 if (SUPPORTS_EDP(dev
) &&
416 driver
->lvds_config
== BDB_DRIVER_FEATURE_EDP
)
417 dev_priv
->edp
.support
= 1;
419 if (driver
->dual_frequency
)
420 dev_priv
->render_reclock_avail
= true;
424 parse_edp(struct drm_i915_private
*dev_priv
, struct bdb_header
*bdb
)
427 struct edp_power_seq
*edp_pps
;
428 struct edp_link_params
*edp_link_params
;
430 edp
= find_section(bdb
, BDB_EDP
);
432 if (SUPPORTS_EDP(dev_priv
->dev
) && dev_priv
->edp
.support
) {
433 DRM_DEBUG_KMS("No eDP BDB found but eDP panel "
434 "supported, assume %dbpp panel color "
441 switch ((edp
->color_depth
>> (panel_type
* 2)) & 3) {
443 dev_priv
->edp
.bpp
= 18;
446 dev_priv
->edp
.bpp
= 24;
449 dev_priv
->edp
.bpp
= 30;
453 /* Get the eDP sequencing and link info */
454 edp_pps
= &edp
->power_seqs
[panel_type
];
455 edp_link_params
= &edp
->link_params
[panel_type
];
457 dev_priv
->edp
.pps
= *edp_pps
;
459 dev_priv
->edp
.rate
= edp_link_params
->rate
? DP_LINK_BW_2_7
:
461 switch (edp_link_params
->lanes
) {
463 dev_priv
->edp
.lanes
= 1;
466 dev_priv
->edp
.lanes
= 2;
470 dev_priv
->edp
.lanes
= 4;
473 switch (edp_link_params
->preemphasis
) {
475 dev_priv
->edp
.preemphasis
= DP_TRAIN_PRE_EMPHASIS_0
;
478 dev_priv
->edp
.preemphasis
= DP_TRAIN_PRE_EMPHASIS_3_5
;
481 dev_priv
->edp
.preemphasis
= DP_TRAIN_PRE_EMPHASIS_6
;
484 dev_priv
->edp
.preemphasis
= DP_TRAIN_PRE_EMPHASIS_9_5
;
487 switch (edp_link_params
->vswing
) {
489 dev_priv
->edp
.vswing
= DP_TRAIN_VOLTAGE_SWING_400
;
492 dev_priv
->edp
.vswing
= DP_TRAIN_VOLTAGE_SWING_600
;
495 dev_priv
->edp
.vswing
= DP_TRAIN_VOLTAGE_SWING_800
;
498 dev_priv
->edp
.vswing
= DP_TRAIN_VOLTAGE_SWING_1200
;
504 parse_device_mapping(struct drm_i915_private
*dev_priv
,
505 struct bdb_header
*bdb
)
507 struct bdb_general_definitions
*p_defs
;
508 struct child_device_config
*p_child
, *child_dev_ptr
;
509 int i
, child_device_num
, count
;
512 p_defs
= find_section(bdb
, BDB_GENERAL_DEFINITIONS
);
514 DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
517 /* judge whether the size of child device meets the requirements.
518 * If the child device size obtained from general definition block
519 * is different with sizeof(struct child_device_config), skip the
520 * parsing of sdvo device info
522 if (p_defs
->child_dev_size
!= sizeof(*p_child
)) {
523 /* different child dev size . Ignore it */
524 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
527 /* get the block size of general definitions */
528 block_size
= get_blocksize(p_defs
);
529 /* get the number of child device */
530 child_device_num
= (block_size
- sizeof(*p_defs
)) /
533 /* get the number of child device that is present */
534 for (i
= 0; i
< child_device_num
; i
++) {
535 p_child
= &(p_defs
->devices
[i
]);
536 if (!p_child
->device_type
) {
537 /* skip the device block if device type is invalid */
543 DRM_DEBUG_KMS("no child dev is parsed from VBT \n");
546 dev_priv
->child_dev
= kzalloc(sizeof(*p_child
) * count
, GFP_KERNEL
);
547 if (!dev_priv
->child_dev
) {
548 DRM_DEBUG_KMS("No memory space for child device\n");
552 dev_priv
->child_dev_num
= count
;
554 for (i
= 0; i
< child_device_num
; i
++) {
555 p_child
= &(p_defs
->devices
[i
]);
556 if (!p_child
->device_type
) {
557 /* skip the device block if device type is invalid */
560 child_dev_ptr
= dev_priv
->child_dev
+ count
;
562 memcpy((void *)child_dev_ptr
, (void *)p_child
,
569 init_vbt_defaults(struct drm_i915_private
*dev_priv
)
571 struct drm_device
*dev
= dev_priv
->dev
;
573 dev_priv
->crt_ddc_pin
= GMBUS_PORT_VGADDC
;
576 dev_priv
->lvds_dither
= 1;
577 dev_priv
->lvds_vbt
= 0;
579 /* SDVO panel data */
580 dev_priv
->sdvo_lvds_vbt_mode
= NULL
;
582 /* general features */
583 dev_priv
->int_tv_support
= 1;
584 dev_priv
->int_crt_support
= 1;
586 /* Default to using SSC */
587 dev_priv
->lvds_use_ssc
= 1;
588 dev_priv
->lvds_ssc_freq
= intel_bios_ssc_frequency(dev
, 1);
589 DRM_DEBUG("Set default to SSC at %dMHz\n", dev_priv
->lvds_ssc_freq
);
592 dev_priv
->edp
.bpp
= 18;
596 * intel_parse_bios - find VBT and initialize settings from the BIOS
599 * Loads the Video BIOS and checks that the VBT exists. Sets scratch registers
600 * to appropriate values.
602 * Returns 0 on success, nonzero on failure.
605 intel_parse_bios(struct drm_device
*dev
)
607 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
608 struct pci_dev
*pdev
= dev
->pdev
;
609 struct bdb_header
*bdb
= NULL
;
610 u8 __iomem
*bios
= NULL
;
612 init_vbt_defaults(dev_priv
);
614 /* XXX Should this validation be moved to intel_opregion.c? */
615 if (dev_priv
->opregion
.vbt
) {
616 struct vbt_header
*vbt
= dev_priv
->opregion
.vbt
;
617 if (memcmp(vbt
->signature
, "$VBT", 4) == 0) {
618 DRM_DEBUG_DRIVER("Using VBT from OpRegion: %20s\n",
620 bdb
= (struct bdb_header
*)((char *)vbt
+ vbt
->bdb_offset
);
622 dev_priv
->opregion
.vbt
= NULL
;
626 struct vbt_header
*vbt
= NULL
;
630 bios
= pci_map_rom(pdev
, &size
);
634 /* Scour memory looking for the VBT signature */
635 for (i
= 0; i
+ 4 < size
; i
++) {
636 if (!memcmp(bios
+ i
, "$VBT", 4)) {
637 vbt
= (struct vbt_header
*)(bios
+ i
);
643 DRM_ERROR("VBT signature missing\n");
644 pci_unmap_rom(pdev
, bios
);
648 bdb
= (struct bdb_header
*)(bios
+ i
+ vbt
->bdb_offset
);
651 /* Grab useful general definitions */
652 parse_general_features(dev_priv
, bdb
);
653 parse_general_definitions(dev_priv
, bdb
);
654 parse_lfp_panel_data(dev_priv
, bdb
);
655 parse_sdvo_panel_data(dev_priv
, bdb
);
656 parse_sdvo_device_mapping(dev_priv
, bdb
);
657 parse_device_mapping(dev_priv
, bdb
);
658 parse_driver_features(dev_priv
, bdb
);
659 parse_edp(dev_priv
, bdb
);
662 pci_unmap_rom(pdev
, bios
);
667 /* Ensure that vital registers have been initialised, even if the BIOS
668 * is absent or just failing to do its job.
670 void intel_setup_bios(struct drm_device
*dev
)
672 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
674 /* Set the Panel Power On/Off timings if uninitialized. */
675 if ((I915_READ(PP_ON_DELAYS
) == 0) && (I915_READ(PP_OFF_DELAYS
) == 0)) {
676 /* Set T2 to 40ms and T5 to 200ms */
677 I915_WRITE(PP_ON_DELAYS
, 0x019007d0);
679 /* Set T3 to 35ms and Tx to 200ms */
680 I915_WRITE(PP_OFF_DELAYS
, 0x015e07d0);