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>
28 #include <drm/drm_dp_helper.h>
30 #include <drm/i915_drm.h>
33 #define _INTEL_BIOS_PRIVATE
34 #include "intel_vbt_defs.h"
37 * DOC: Video BIOS Table (VBT)
39 * The Video BIOS Table, or VBT, provides platform and board specific
40 * configuration information to the driver that is not discoverable or available
41 * through other means. The configuration is mostly related to display
42 * hardware. The VBT is available via the ACPI OpRegion or, on older systems, in
45 * The VBT consists of a VBT Header (defined as &struct vbt_header), a BDB
46 * Header (&struct bdb_header), and a number of BIOS Data Blocks (BDB) that
47 * contain the actual configuration information. The VBT Header, and thus the
48 * VBT, begins with "$VBT" signature. The VBT Header contains the offset of the
49 * BDB Header. The data blocks are concatenated after the BDB Header. The data
50 * blocks have a 1-byte Block ID, 2-byte Block Size, and Block Size bytes of
51 * data. (Block 53, the MIPI Sequence Block is an exception.)
53 * The driver parses the VBT during load. The relevant information is stored in
54 * driver private data for ease of use, and the actual VBT is not read after
58 #define SLAVE_ADDR1 0x70
59 #define SLAVE_ADDR2 0x72
61 /* Get BDB block size given a pointer to Block ID. */
62 static u32
_get_blocksize(const u8
*block_base
)
64 /* The MIPI Sequence Block v3+ has a separate size field. */
65 if (*block_base
== BDB_MIPI_SEQUENCE
&& *(block_base
+ 3) >= 3)
66 return *((const u32
*)(block_base
+ 4));
68 return *((const u16
*)(block_base
+ 1));
71 /* Get BDB block size give a pointer to data after Block ID and Block Size. */
72 static u32
get_blocksize(const void *block_data
)
74 return _get_blocksize(block_data
- 3);
78 find_section(const void *_bdb
, int section_id
)
80 const struct bdb_header
*bdb
= _bdb
;
81 const u8
*base
= _bdb
;
83 u32 total
, current_size
;
86 /* skip to first section */
87 index
+= bdb
->header_size
;
88 total
= bdb
->bdb_size
;
90 /* walk the sections looking for section_id */
91 while (index
+ 3 < total
) {
92 current_id
= *(base
+ index
);
93 current_size
= _get_blocksize(base
+ index
);
96 if (index
+ current_size
> total
)
99 if (current_id
== section_id
)
102 index
+= current_size
;
109 fill_detail_timing_data(struct drm_display_mode
*panel_fixed_mode
,
110 const struct lvds_dvo_timing
*dvo_timing
)
112 panel_fixed_mode
->hdisplay
= (dvo_timing
->hactive_hi
<< 8) |
113 dvo_timing
->hactive_lo
;
114 panel_fixed_mode
->hsync_start
= panel_fixed_mode
->hdisplay
+
115 ((dvo_timing
->hsync_off_hi
<< 8) | dvo_timing
->hsync_off_lo
);
116 panel_fixed_mode
->hsync_end
= panel_fixed_mode
->hsync_start
+
117 dvo_timing
->hsync_pulse_width
;
118 panel_fixed_mode
->htotal
= panel_fixed_mode
->hdisplay
+
119 ((dvo_timing
->hblank_hi
<< 8) | dvo_timing
->hblank_lo
);
121 panel_fixed_mode
->vdisplay
= (dvo_timing
->vactive_hi
<< 8) |
122 dvo_timing
->vactive_lo
;
123 panel_fixed_mode
->vsync_start
= panel_fixed_mode
->vdisplay
+
124 dvo_timing
->vsync_off
;
125 panel_fixed_mode
->vsync_end
= panel_fixed_mode
->vsync_start
+
126 dvo_timing
->vsync_pulse_width
;
127 panel_fixed_mode
->vtotal
= panel_fixed_mode
->vdisplay
+
128 ((dvo_timing
->vblank_hi
<< 8) | dvo_timing
->vblank_lo
);
129 panel_fixed_mode
->clock
= dvo_timing
->clock
* 10;
130 panel_fixed_mode
->type
= DRM_MODE_TYPE_PREFERRED
;
132 if (dvo_timing
->hsync_positive
)
133 panel_fixed_mode
->flags
|= DRM_MODE_FLAG_PHSYNC
;
135 panel_fixed_mode
->flags
|= DRM_MODE_FLAG_NHSYNC
;
137 if (dvo_timing
->vsync_positive
)
138 panel_fixed_mode
->flags
|= DRM_MODE_FLAG_PVSYNC
;
140 panel_fixed_mode
->flags
|= DRM_MODE_FLAG_NVSYNC
;
142 /* Some VBTs have bogus h/vtotal values */
143 if (panel_fixed_mode
->hsync_end
> panel_fixed_mode
->htotal
)
144 panel_fixed_mode
->htotal
= panel_fixed_mode
->hsync_end
+ 1;
145 if (panel_fixed_mode
->vsync_end
> panel_fixed_mode
->vtotal
)
146 panel_fixed_mode
->vtotal
= panel_fixed_mode
->vsync_end
+ 1;
148 drm_mode_set_name(panel_fixed_mode
);
151 static const struct lvds_dvo_timing
*
152 get_lvds_dvo_timing(const struct bdb_lvds_lfp_data
*lvds_lfp_data
,
153 const struct bdb_lvds_lfp_data_ptrs
*lvds_lfp_data_ptrs
,
157 * the size of fp_timing varies on the different platform.
158 * So calculate the DVO timing relative offset in LVDS data
159 * entry to get the DVO timing entry
163 lvds_lfp_data_ptrs
->ptr
[1].dvo_timing_offset
-
164 lvds_lfp_data_ptrs
->ptr
[0].dvo_timing_offset
;
165 int dvo_timing_offset
=
166 lvds_lfp_data_ptrs
->ptr
[0].dvo_timing_offset
-
167 lvds_lfp_data_ptrs
->ptr
[0].fp_timing_offset
;
168 char *entry
= (char *)lvds_lfp_data
->data
+ lfp_data_size
* index
;
170 return (struct lvds_dvo_timing
*)(entry
+ dvo_timing_offset
);
173 /* get lvds_fp_timing entry
174 * this function may return NULL if the corresponding entry is invalid
176 static const struct lvds_fp_timing
*
177 get_lvds_fp_timing(const struct bdb_header
*bdb
,
178 const struct bdb_lvds_lfp_data
*data
,
179 const struct bdb_lvds_lfp_data_ptrs
*ptrs
,
182 size_t data_ofs
= (const u8
*)data
- (const u8
*)bdb
;
183 u16 data_size
= ((const u16
*)data
)[-1]; /* stored in header */
186 if (index
>= ARRAY_SIZE(ptrs
->ptr
))
188 ofs
= ptrs
->ptr
[index
].fp_timing_offset
;
189 if (ofs
< data_ofs
||
190 ofs
+ sizeof(struct lvds_fp_timing
) > data_ofs
+ data_size
)
192 return (const struct lvds_fp_timing
*)((const u8
*)bdb
+ ofs
);
195 /* Try to find integrated panel data */
197 parse_lfp_panel_data(struct drm_i915_private
*dev_priv
,
198 const struct bdb_header
*bdb
)
200 const struct bdb_lvds_options
*lvds_options
;
201 const struct bdb_lvds_lfp_data
*lvds_lfp_data
;
202 const struct bdb_lvds_lfp_data_ptrs
*lvds_lfp_data_ptrs
;
203 const struct lvds_dvo_timing
*panel_dvo_timing
;
204 const struct lvds_fp_timing
*fp_timing
;
205 struct drm_display_mode
*panel_fixed_mode
;
210 lvds_options
= find_section(bdb
, BDB_LVDS_OPTIONS
);
214 dev_priv
->vbt
.lvds_dither
= lvds_options
->pixel_dither
;
216 ret
= intel_opregion_get_panel_type(dev_priv
->dev
);
220 DRM_DEBUG_KMS("Panel type: %d (OpRegion)\n", panel_type
);
222 if (lvds_options
->panel_type
> 0xf) {
223 DRM_DEBUG_KMS("Invalid VBT panel type 0x%x\n",
224 lvds_options
->panel_type
);
227 panel_type
= lvds_options
->panel_type
;
228 DRM_DEBUG_KMS("Panel type: %d (VBT)\n", panel_type
);
231 dev_priv
->vbt
.panel_type
= panel_type
;
233 drrs_mode
= (lvds_options
->dps_panel_type_bits
234 >> (panel_type
* 2)) & MODE_MASK
;
236 * VBT has static DRRS = 0 and seamless DRRS = 2.
237 * The below piece of code is required to adjust vbt.drrs_type
238 * to match the enum drrs_support_type.
242 dev_priv
->vbt
.drrs_type
= STATIC_DRRS_SUPPORT
;
243 DRM_DEBUG_KMS("DRRS supported mode is static\n");
246 dev_priv
->vbt
.drrs_type
= SEAMLESS_DRRS_SUPPORT
;
247 DRM_DEBUG_KMS("DRRS supported mode is seamless\n");
250 dev_priv
->vbt
.drrs_type
= DRRS_NOT_SUPPORTED
;
251 DRM_DEBUG_KMS("DRRS not supported (VBT input)\n");
255 lvds_lfp_data
= find_section(bdb
, BDB_LVDS_LFP_DATA
);
259 lvds_lfp_data_ptrs
= find_section(bdb
, BDB_LVDS_LFP_DATA_PTRS
);
260 if (!lvds_lfp_data_ptrs
)
263 dev_priv
->vbt
.lvds_vbt
= 1;
265 panel_dvo_timing
= get_lvds_dvo_timing(lvds_lfp_data
,
269 panel_fixed_mode
= kzalloc(sizeof(*panel_fixed_mode
), GFP_KERNEL
);
270 if (!panel_fixed_mode
)
273 fill_detail_timing_data(panel_fixed_mode
, panel_dvo_timing
);
275 dev_priv
->vbt
.lfp_lvds_vbt_mode
= panel_fixed_mode
;
277 DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n");
278 drm_mode_debug_printmodeline(panel_fixed_mode
);
280 fp_timing
= get_lvds_fp_timing(bdb
, lvds_lfp_data
,
284 /* check the resolution, just to be sure */
285 if (fp_timing
->x_res
== panel_fixed_mode
->hdisplay
&&
286 fp_timing
->y_res
== panel_fixed_mode
->vdisplay
) {
287 dev_priv
->vbt
.bios_lvds_val
= fp_timing
->lvds_reg_val
;
288 DRM_DEBUG_KMS("VBT initial LVDS value %x\n",
289 dev_priv
->vbt
.bios_lvds_val
);
295 parse_lfp_backlight(struct drm_i915_private
*dev_priv
,
296 const struct bdb_header
*bdb
)
298 const struct bdb_lfp_backlight_data
*backlight_data
;
299 const struct bdb_lfp_backlight_data_entry
*entry
;
300 int panel_type
= dev_priv
->vbt
.panel_type
;
302 backlight_data
= find_section(bdb
, BDB_LVDS_BACKLIGHT
);
306 if (backlight_data
->entry_size
!= sizeof(backlight_data
->data
[0])) {
307 DRM_DEBUG_KMS("Unsupported backlight data entry size %u\n",
308 backlight_data
->entry_size
);
312 entry
= &backlight_data
->data
[panel_type
];
314 dev_priv
->vbt
.backlight
.present
= entry
->type
== BDB_BACKLIGHT_TYPE_PWM
;
315 if (!dev_priv
->vbt
.backlight
.present
) {
316 DRM_DEBUG_KMS("PWM backlight not present in VBT (type %u)\n",
321 dev_priv
->vbt
.backlight
.pwm_freq_hz
= entry
->pwm_freq_hz
;
322 dev_priv
->vbt
.backlight
.active_low_pwm
= entry
->active_low_pwm
;
323 dev_priv
->vbt
.backlight
.min_brightness
= entry
->min_brightness
;
324 DRM_DEBUG_KMS("VBT backlight PWM modulation frequency %u Hz, "
325 "active %s, min brightness %u, level %u\n",
326 dev_priv
->vbt
.backlight
.pwm_freq_hz
,
327 dev_priv
->vbt
.backlight
.active_low_pwm
? "low" : "high",
328 dev_priv
->vbt
.backlight
.min_brightness
,
329 backlight_data
->level
[panel_type
]);
332 /* Try to find sdvo panel data */
334 parse_sdvo_panel_data(struct drm_i915_private
*dev_priv
,
335 const struct bdb_header
*bdb
)
337 const struct lvds_dvo_timing
*dvo_timing
;
338 struct drm_display_mode
*panel_fixed_mode
;
341 index
= i915
.vbt_sdvo_panel_type
;
343 DRM_DEBUG_KMS("Ignore SDVO panel mode from BIOS VBT tables.\n");
348 const struct bdb_sdvo_lvds_options
*sdvo_lvds_options
;
350 sdvo_lvds_options
= find_section(bdb
, BDB_SDVO_LVDS_OPTIONS
);
351 if (!sdvo_lvds_options
)
354 index
= sdvo_lvds_options
->panel_type
;
357 dvo_timing
= find_section(bdb
, BDB_SDVO_PANEL_DTDS
);
361 panel_fixed_mode
= kzalloc(sizeof(*panel_fixed_mode
), GFP_KERNEL
);
362 if (!panel_fixed_mode
)
365 fill_detail_timing_data(panel_fixed_mode
, dvo_timing
+ index
);
367 dev_priv
->vbt
.sdvo_lvds_vbt_mode
= panel_fixed_mode
;
369 DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n");
370 drm_mode_debug_printmodeline(panel_fixed_mode
);
373 static int intel_bios_ssc_frequency(struct drm_i915_private
*dev_priv
,
376 switch (INTEL_INFO(dev_priv
)->gen
) {
378 return alternate
? 66667 : 48000;
381 return alternate
? 100000 : 96000;
383 return alternate
? 100000 : 120000;
388 parse_general_features(struct drm_i915_private
*dev_priv
,
389 const struct bdb_header
*bdb
)
391 const struct bdb_general_features
*general
;
393 general
= find_section(bdb
, BDB_GENERAL_FEATURES
);
397 dev_priv
->vbt
.int_tv_support
= general
->int_tv_support
;
398 /* int_crt_support can't be trusted on earlier platforms */
399 if (bdb
->version
>= 155 &&
400 (HAS_DDI(dev_priv
) || IS_VALLEYVIEW(dev_priv
)))
401 dev_priv
->vbt
.int_crt_support
= general
->int_crt_support
;
402 dev_priv
->vbt
.lvds_use_ssc
= general
->enable_ssc
;
403 dev_priv
->vbt
.lvds_ssc_freq
=
404 intel_bios_ssc_frequency(dev_priv
, general
->ssc_freq
);
405 dev_priv
->vbt
.display_clock_mode
= general
->display_clock_mode
;
406 dev_priv
->vbt
.fdi_rx_polarity_inverted
= general
->fdi_rx_polarity_inverted
;
407 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",
408 dev_priv
->vbt
.int_tv_support
,
409 dev_priv
->vbt
.int_crt_support
,
410 dev_priv
->vbt
.lvds_use_ssc
,
411 dev_priv
->vbt
.lvds_ssc_freq
,
412 dev_priv
->vbt
.display_clock_mode
,
413 dev_priv
->vbt
.fdi_rx_polarity_inverted
);
417 parse_general_definitions(struct drm_i915_private
*dev_priv
,
418 const struct bdb_header
*bdb
)
420 const struct bdb_general_definitions
*general
;
422 general
= find_section(bdb
, BDB_GENERAL_DEFINITIONS
);
424 u16 block_size
= get_blocksize(general
);
425 if (block_size
>= sizeof(*general
)) {
426 int bus_pin
= general
->crt_ddc_gmbus_pin
;
427 DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin
);
428 if (intel_gmbus_is_valid_pin(dev_priv
, bus_pin
))
429 dev_priv
->vbt
.crt_ddc_pin
= bus_pin
;
431 DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n",
437 static const union child_device_config
*
438 child_device_ptr(const struct bdb_general_definitions
*p_defs
, int i
)
440 return (const void *) &p_defs
->devices
[i
* p_defs
->child_dev_size
];
444 parse_sdvo_device_mapping(struct drm_i915_private
*dev_priv
,
445 const struct bdb_header
*bdb
)
447 struct sdvo_device_mapping
*p_mapping
;
448 const struct bdb_general_definitions
*p_defs
;
449 const struct old_child_dev_config
*child
; /* legacy */
450 int i
, child_device_num
, count
;
453 p_defs
= find_section(bdb
, BDB_GENERAL_DEFINITIONS
);
455 DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n");
460 * Only parse SDVO mappings when the general definitions block child
461 * device size matches that of the *legacy* child device config
462 * struct. Thus, SDVO mapping will be skipped for newer VBT.
464 if (p_defs
->child_dev_size
!= sizeof(*child
)) {
465 DRM_DEBUG_KMS("Unsupported child device size for SDVO mapping.\n");
468 /* get the block size of general definitions */
469 block_size
= get_blocksize(p_defs
);
470 /* get the number of child device */
471 child_device_num
= (block_size
- sizeof(*p_defs
)) /
472 p_defs
->child_dev_size
;
474 for (i
= 0; i
< child_device_num
; i
++) {
475 child
= &child_device_ptr(p_defs
, i
)->old
;
476 if (!child
->device_type
) {
477 /* skip the device block if device type is invalid */
480 if (child
->slave_addr
!= SLAVE_ADDR1
&&
481 child
->slave_addr
!= SLAVE_ADDR2
) {
483 * If the slave address is neither 0x70 nor 0x72,
484 * it is not a SDVO device. Skip it.
488 if (child
->dvo_port
!= DEVICE_PORT_DVOB
&&
489 child
->dvo_port
!= DEVICE_PORT_DVOC
) {
490 /* skip the incorrect SDVO port */
491 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n");
494 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
497 (child
->dvo_port
== DEVICE_PORT_DVOB
) ?
499 p_mapping
= &dev_priv
->vbt
.sdvo_mappings
[child
->dvo_port
- 1];
500 if (!p_mapping
->initialized
) {
501 p_mapping
->dvo_port
= child
->dvo_port
;
502 p_mapping
->slave_addr
= child
->slave_addr
;
503 p_mapping
->dvo_wiring
= child
->dvo_wiring
;
504 p_mapping
->ddc_pin
= child
->ddc_pin
;
505 p_mapping
->i2c_pin
= child
->i2c_pin
;
506 p_mapping
->initialized
= 1;
507 DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
509 p_mapping
->slave_addr
,
510 p_mapping
->dvo_wiring
,
514 DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
515 "two SDVO device.\n");
517 if (child
->slave2_addr
) {
518 /* Maybe this is a SDVO device with multiple inputs */
519 /* And the mapping info is not added */
520 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
521 " is a SDVO device with multiple inputs.\n");
527 /* No SDVO device info is found */
528 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
534 parse_driver_features(struct drm_i915_private
*dev_priv
,
535 const struct bdb_header
*bdb
)
537 const struct bdb_driver_features
*driver
;
539 driver
= find_section(bdb
, BDB_DRIVER_FEATURES
);
543 if (driver
->lvds_config
== BDB_DRIVER_FEATURE_EDP
)
544 dev_priv
->vbt
.edp
.support
= 1;
546 DRM_DEBUG_KMS("DRRS State Enabled:%d\n", driver
->drrs_enabled
);
548 * If DRRS is not supported, drrs_type has to be set to 0.
549 * This is because, VBT is configured in such a way that
550 * static DRRS is 0 and DRRS not supported is represented by
551 * driver->drrs_enabled=false
553 if (!driver
->drrs_enabled
)
554 dev_priv
->vbt
.drrs_type
= DRRS_NOT_SUPPORTED
;
558 parse_edp(struct drm_i915_private
*dev_priv
, const struct bdb_header
*bdb
)
560 const struct bdb_edp
*edp
;
561 const struct edp_power_seq
*edp_pps
;
562 const struct edp_link_params
*edp_link_params
;
563 int panel_type
= dev_priv
->vbt
.panel_type
;
565 edp
= find_section(bdb
, BDB_EDP
);
567 if (dev_priv
->vbt
.edp
.support
)
568 DRM_DEBUG_KMS("No eDP BDB found but eDP panel supported.\n");
572 switch ((edp
->color_depth
>> (panel_type
* 2)) & 3) {
574 dev_priv
->vbt
.edp
.bpp
= 18;
577 dev_priv
->vbt
.edp
.bpp
= 24;
580 dev_priv
->vbt
.edp
.bpp
= 30;
584 /* Get the eDP sequencing and link info */
585 edp_pps
= &edp
->power_seqs
[panel_type
];
586 edp_link_params
= &edp
->link_params
[panel_type
];
588 dev_priv
->vbt
.edp
.pps
= *edp_pps
;
590 switch (edp_link_params
->rate
) {
592 dev_priv
->vbt
.edp
.rate
= DP_LINK_BW_1_62
;
595 dev_priv
->vbt
.edp
.rate
= DP_LINK_BW_2_7
;
598 DRM_DEBUG_KMS("VBT has unknown eDP link rate value %u\n",
599 edp_link_params
->rate
);
603 switch (edp_link_params
->lanes
) {
605 dev_priv
->vbt
.edp
.lanes
= 1;
608 dev_priv
->vbt
.edp
.lanes
= 2;
611 dev_priv
->vbt
.edp
.lanes
= 4;
614 DRM_DEBUG_KMS("VBT has unknown eDP lane count value %u\n",
615 edp_link_params
->lanes
);
619 switch (edp_link_params
->preemphasis
) {
620 case EDP_PREEMPHASIS_NONE
:
621 dev_priv
->vbt
.edp
.preemphasis
= DP_TRAIN_PRE_EMPH_LEVEL_0
;
623 case EDP_PREEMPHASIS_3_5dB
:
624 dev_priv
->vbt
.edp
.preemphasis
= DP_TRAIN_PRE_EMPH_LEVEL_1
;
626 case EDP_PREEMPHASIS_6dB
:
627 dev_priv
->vbt
.edp
.preemphasis
= DP_TRAIN_PRE_EMPH_LEVEL_2
;
629 case EDP_PREEMPHASIS_9_5dB
:
630 dev_priv
->vbt
.edp
.preemphasis
= DP_TRAIN_PRE_EMPH_LEVEL_3
;
633 DRM_DEBUG_KMS("VBT has unknown eDP pre-emphasis value %u\n",
634 edp_link_params
->preemphasis
);
638 switch (edp_link_params
->vswing
) {
639 case EDP_VSWING_0_4V
:
640 dev_priv
->vbt
.edp
.vswing
= DP_TRAIN_VOLTAGE_SWING_LEVEL_0
;
642 case EDP_VSWING_0_6V
:
643 dev_priv
->vbt
.edp
.vswing
= DP_TRAIN_VOLTAGE_SWING_LEVEL_1
;
645 case EDP_VSWING_0_8V
:
646 dev_priv
->vbt
.edp
.vswing
= DP_TRAIN_VOLTAGE_SWING_LEVEL_2
;
648 case EDP_VSWING_1_2V
:
649 dev_priv
->vbt
.edp
.vswing
= DP_TRAIN_VOLTAGE_SWING_LEVEL_3
;
652 DRM_DEBUG_KMS("VBT has unknown eDP voltage swing value %u\n",
653 edp_link_params
->vswing
);
657 if (bdb
->version
>= 173) {
660 /* Don't read from VBT if module parameter has valid value*/
661 if (i915
.edp_vswing
) {
662 dev_priv
->vbt
.edp
.low_vswing
= i915
.edp_vswing
== 1;
664 vswing
= (edp
->edp_vswing_preemph
>> (panel_type
* 4)) & 0xF;
665 dev_priv
->vbt
.edp
.low_vswing
= vswing
== 0;
671 parse_psr(struct drm_i915_private
*dev_priv
, const struct bdb_header
*bdb
)
673 const struct bdb_psr
*psr
;
674 const struct psr_table
*psr_table
;
675 int panel_type
= dev_priv
->vbt
.panel_type
;
677 psr
= find_section(bdb
, BDB_PSR
);
679 DRM_DEBUG_KMS("No PSR BDB found.\n");
683 psr_table
= &psr
->psr_table
[panel_type
];
685 dev_priv
->vbt
.psr
.full_link
= psr_table
->full_link
;
686 dev_priv
->vbt
.psr
.require_aux_wakeup
= psr_table
->require_aux_to_wakeup
;
688 /* Allowed VBT values goes from 0 to 15 */
689 dev_priv
->vbt
.psr
.idle_frames
= psr_table
->idle_frames
< 0 ? 0 :
690 psr_table
->idle_frames
> 15 ? 15 : psr_table
->idle_frames
;
692 switch (psr_table
->lines_to_wait
) {
694 dev_priv
->vbt
.psr
.lines_to_wait
= PSR_0_LINES_TO_WAIT
;
697 dev_priv
->vbt
.psr
.lines_to_wait
= PSR_1_LINE_TO_WAIT
;
700 dev_priv
->vbt
.psr
.lines_to_wait
= PSR_4_LINES_TO_WAIT
;
703 dev_priv
->vbt
.psr
.lines_to_wait
= PSR_8_LINES_TO_WAIT
;
706 DRM_DEBUG_KMS("VBT has unknown PSR lines to wait %u\n",
707 psr_table
->lines_to_wait
);
711 dev_priv
->vbt
.psr
.tp1_wakeup_time
= psr_table
->tp1_wakeup_time
;
712 dev_priv
->vbt
.psr
.tp2_tp3_wakeup_time
= psr_table
->tp2_tp3_wakeup_time
;
716 parse_mipi_config(struct drm_i915_private
*dev_priv
,
717 const struct bdb_header
*bdb
)
719 const struct bdb_mipi_config
*start
;
720 const struct mipi_config
*config
;
721 const struct mipi_pps_data
*pps
;
722 int panel_type
= dev_priv
->vbt
.panel_type
;
724 /* parse MIPI blocks only if LFP type is MIPI */
725 if (!intel_bios_is_dsi_present(dev_priv
, NULL
))
728 /* Initialize this to undefined indicating no generic MIPI support */
729 dev_priv
->vbt
.dsi
.panel_id
= MIPI_DSI_UNDEFINED_PANEL_ID
;
731 /* Block #40 is already parsed and panel_fixed_mode is
732 * stored in dev_priv->lfp_lvds_vbt_mode
733 * resuse this when needed
736 /* Parse #52 for panel index used from panel_type already
739 start
= find_section(bdb
, BDB_MIPI_CONFIG
);
741 DRM_DEBUG_KMS("No MIPI config BDB found");
745 DRM_DEBUG_DRIVER("Found MIPI Config block, panel index = %d\n",
749 * get hold of the correct configuration block and pps data as per
750 * the panel_type as index
752 config
= &start
->config
[panel_type
];
753 pps
= &start
->pps
[panel_type
];
755 /* store as of now full data. Trim when we realise all is not needed */
756 dev_priv
->vbt
.dsi
.config
= kmemdup(config
, sizeof(struct mipi_config
), GFP_KERNEL
);
757 if (!dev_priv
->vbt
.dsi
.config
)
760 dev_priv
->vbt
.dsi
.pps
= kmemdup(pps
, sizeof(struct mipi_pps_data
), GFP_KERNEL
);
761 if (!dev_priv
->vbt
.dsi
.pps
) {
762 kfree(dev_priv
->vbt
.dsi
.config
);
766 /* We have mandatory mipi config blocks. Initialize as generic panel */
767 dev_priv
->vbt
.dsi
.panel_id
= MIPI_DSI_GENERIC_PANEL_ID
;
770 /* Find the sequence block and size for the given panel. */
772 find_panel_sequence_block(const struct bdb_mipi_sequence
*sequence
,
773 u16 panel_id
, u32
*seq_size
)
775 u32 total
= get_blocksize(sequence
);
776 const u8
*data
= &sequence
->data
[0];
779 int header_size
= sequence
->version
>= 3 ? 5 : 3;
783 /* skip new block size */
784 if (sequence
->version
>= 3)
787 for (i
= 0; i
< MAX_MIPI_CONFIGURATIONS
&& index
< total
; i
++) {
788 if (index
+ header_size
> total
) {
789 DRM_ERROR("Invalid sequence block (header)\n");
793 current_id
= *(data
+ index
);
794 if (sequence
->version
>= 3)
795 current_size
= *((const u32
*)(data
+ index
+ 1));
797 current_size
= *((const u16
*)(data
+ index
+ 1));
799 index
+= header_size
;
801 if (index
+ current_size
> total
) {
802 DRM_ERROR("Invalid sequence block\n");
806 if (current_id
== panel_id
) {
807 *seq_size
= current_size
;
811 index
+= current_size
;
814 DRM_ERROR("Sequence block detected but no valid configuration\n");
819 static int goto_next_sequence(const u8
*data
, int index
, int total
)
823 /* Skip Sequence Byte. */
824 for (index
= index
+ 1; index
< total
; index
+= len
) {
825 u8 operation_byte
= *(data
+ index
);
828 switch (operation_byte
) {
829 case MIPI_SEQ_ELEM_END
:
831 case MIPI_SEQ_ELEM_SEND_PKT
:
832 if (index
+ 4 > total
)
835 len
= *((const u16
*)(data
+ index
+ 2)) + 4;
837 case MIPI_SEQ_ELEM_DELAY
:
840 case MIPI_SEQ_ELEM_GPIO
:
843 case MIPI_SEQ_ELEM_I2C
:
844 if (index
+ 7 > total
)
846 len
= *(data
+ index
+ 6) + 7;
849 DRM_ERROR("Unknown operation byte\n");
857 static int goto_next_sequence_v3(const u8
*data
, int index
, int total
)
861 u32 size_of_sequence
;
864 * Could skip sequence based on Size of Sequence alone, but also do some
865 * checking on the structure.
868 DRM_ERROR("Too small sequence size\n");
872 /* Skip Sequence Byte. */
876 * Size of Sequence. Excludes the Sequence Byte and the size itself,
877 * includes MIPI_SEQ_ELEM_END byte, excludes the final MIPI_SEQ_END
880 size_of_sequence
= *((const uint32_t *)(data
+ index
));
883 seq_end
= index
+ size_of_sequence
;
884 if (seq_end
> total
) {
885 DRM_ERROR("Invalid sequence size\n");
889 for (; index
< total
; index
+= len
) {
890 u8 operation_byte
= *(data
+ index
);
893 if (operation_byte
== MIPI_SEQ_ELEM_END
) {
894 if (index
!= seq_end
) {
895 DRM_ERROR("Invalid element structure\n");
901 len
= *(data
+ index
);
905 * FIXME: Would be nice to check elements like for v1/v2 in
906 * goto_next_sequence() above.
908 switch (operation_byte
) {
909 case MIPI_SEQ_ELEM_SEND_PKT
:
910 case MIPI_SEQ_ELEM_DELAY
:
911 case MIPI_SEQ_ELEM_GPIO
:
912 case MIPI_SEQ_ELEM_I2C
:
913 case MIPI_SEQ_ELEM_SPI
:
914 case MIPI_SEQ_ELEM_PMIC
:
917 DRM_ERROR("Unknown operation byte %u\n",
927 parse_mipi_sequence(struct drm_i915_private
*dev_priv
,
928 const struct bdb_header
*bdb
)
930 int panel_type
= dev_priv
->vbt
.panel_type
;
931 const struct bdb_mipi_sequence
*sequence
;
937 /* Only our generic panel driver uses the sequence block. */
938 if (dev_priv
->vbt
.dsi
.panel_id
!= MIPI_DSI_GENERIC_PANEL_ID
)
941 sequence
= find_section(bdb
, BDB_MIPI_SEQUENCE
);
943 DRM_DEBUG_KMS("No MIPI Sequence found, parsing complete\n");
947 /* Fail gracefully for forward incompatible sequence block. */
948 if (sequence
->version
>= 4) {
949 DRM_ERROR("Unable to parse MIPI Sequence Block v%u\n",
954 DRM_DEBUG_DRIVER("Found MIPI sequence block v%u\n", sequence
->version
);
956 seq_data
= find_panel_sequence_block(sequence
, panel_type
, &seq_size
);
960 data
= kmemdup(seq_data
, seq_size
, GFP_KERNEL
);
964 /* Parse the sequences, store pointers to each sequence. */
966 u8 seq_id
= *(data
+ index
);
967 if (seq_id
== MIPI_SEQ_END
)
970 if (seq_id
>= MIPI_SEQ_MAX
) {
971 DRM_ERROR("Unknown sequence %u\n", seq_id
);
975 dev_priv
->vbt
.dsi
.sequence
[seq_id
] = data
+ index
;
977 if (sequence
->version
>= 3)
978 index
= goto_next_sequence_v3(data
, index
, seq_size
);
980 index
= goto_next_sequence(data
, index
, seq_size
);
982 DRM_ERROR("Invalid sequence %u\n", seq_id
);
987 dev_priv
->vbt
.dsi
.data
= data
;
988 dev_priv
->vbt
.dsi
.size
= seq_size
;
989 dev_priv
->vbt
.dsi
.seq_version
= sequence
->version
;
991 DRM_DEBUG_DRIVER("MIPI related VBT parsing complete\n");
996 memset(dev_priv
->vbt
.dsi
.sequence
, 0, sizeof(dev_priv
->vbt
.dsi
.sequence
));
999 static u8
translate_iboost(u8 val
)
1001 static const u8 mapping
[] = { 1, 3, 7 }; /* See VBT spec */
1003 if (val
>= ARRAY_SIZE(mapping
)) {
1004 DRM_DEBUG_KMS("Unsupported I_boost value found in VBT (%d), display may not work properly\n", val
);
1007 return mapping
[val
];
1010 static void parse_ddi_port(struct drm_i915_private
*dev_priv
, enum port port
,
1011 const struct bdb_header
*bdb
)
1013 union child_device_config
*it
, *child
= NULL
;
1014 struct ddi_vbt_port_info
*info
= &dev_priv
->vbt
.ddi_port_info
[port
];
1015 uint8_t hdmi_level_shift
;
1017 bool is_dvi
, is_hdmi
, is_dp
, is_edp
, is_crt
;
1018 uint8_t aux_channel
, ddc_pin
;
1019 /* Each DDI port can have more than one value on the "DVO Port" field,
1020 * so look for all the possible values for each port and abort if more
1021 * than one is found. */
1022 int dvo_ports
[][3] = {
1023 {DVO_PORT_HDMIA
, DVO_PORT_DPA
, -1},
1024 {DVO_PORT_HDMIB
, DVO_PORT_DPB
, -1},
1025 {DVO_PORT_HDMIC
, DVO_PORT_DPC
, -1},
1026 {DVO_PORT_HDMID
, DVO_PORT_DPD
, -1},
1027 {DVO_PORT_CRT
, DVO_PORT_HDMIE
, DVO_PORT_DPE
},
1030 /* Find the child device to use, abort if more than one found. */
1031 for (i
= 0; i
< dev_priv
->vbt
.child_dev_num
; i
++) {
1032 it
= dev_priv
->vbt
.child_dev
+ i
;
1034 for (j
= 0; j
< 3; j
++) {
1035 if (dvo_ports
[port
][j
] == -1)
1038 if (it
->common
.dvo_port
== dvo_ports
[port
][j
]) {
1040 DRM_DEBUG_KMS("More than one child device for port %c in VBT.\n",
1051 aux_channel
= child
->raw
[25];
1052 ddc_pin
= child
->common
.ddc_pin
;
1054 is_dvi
= child
->common
.device_type
& DEVICE_TYPE_TMDS_DVI_SIGNALING
;
1055 is_dp
= child
->common
.device_type
& DEVICE_TYPE_DISPLAYPORT_OUTPUT
;
1056 is_crt
= child
->common
.device_type
& DEVICE_TYPE_ANALOG_OUTPUT
;
1057 is_hdmi
= is_dvi
&& (child
->common
.device_type
& DEVICE_TYPE_NOT_HDMI_OUTPUT
) == 0;
1058 is_edp
= is_dp
&& (child
->common
.device_type
& DEVICE_TYPE_INTERNAL_CONNECTOR
);
1060 info
->supports_dvi
= is_dvi
;
1061 info
->supports_hdmi
= is_hdmi
;
1062 info
->supports_dp
= is_dp
;
1064 DRM_DEBUG_KMS("Port %c VBT info: DP:%d HDMI:%d DVI:%d EDP:%d CRT:%d\n",
1065 port_name(port
), is_dp
, is_hdmi
, is_dvi
, is_edp
, is_crt
);
1067 if (is_edp
&& is_dvi
)
1068 DRM_DEBUG_KMS("Internal DP port %c is TMDS compatible\n",
1070 if (is_crt
&& port
!= PORT_E
)
1071 DRM_DEBUG_KMS("Port %c is analog\n", port_name(port
));
1072 if (is_crt
&& (is_dvi
|| is_dp
))
1073 DRM_DEBUG_KMS("Analog port %c is also DP or TMDS compatible\n",
1075 if (is_dvi
&& (port
== PORT_A
|| port
== PORT_E
))
1076 DRM_DEBUG_KMS("Port %c is TMDS compatible\n", port_name(port
));
1077 if (!is_dvi
&& !is_dp
&& !is_crt
)
1078 DRM_DEBUG_KMS("Port %c is not DP/TMDS/CRT compatible\n",
1080 if (is_edp
&& (port
== PORT_B
|| port
== PORT_C
|| port
== PORT_E
))
1081 DRM_DEBUG_KMS("Port %c is internal DP\n", port_name(port
));
1084 if (port
== PORT_E
) {
1085 info
->alternate_ddc_pin
= ddc_pin
;
1086 /* if DDIE share ddc pin with other port, then
1087 * dvi/hdmi couldn't exist on the shared port.
1088 * Otherwise they share the same ddc bin and system
1089 * couldn't communicate with them seperately. */
1090 if (ddc_pin
== DDC_PIN_B
) {
1091 dev_priv
->vbt
.ddi_port_info
[PORT_B
].supports_dvi
= 0;
1092 dev_priv
->vbt
.ddi_port_info
[PORT_B
].supports_hdmi
= 0;
1093 } else if (ddc_pin
== DDC_PIN_C
) {
1094 dev_priv
->vbt
.ddi_port_info
[PORT_C
].supports_dvi
= 0;
1095 dev_priv
->vbt
.ddi_port_info
[PORT_C
].supports_hdmi
= 0;
1096 } else if (ddc_pin
== DDC_PIN_D
) {
1097 dev_priv
->vbt
.ddi_port_info
[PORT_D
].supports_dvi
= 0;
1098 dev_priv
->vbt
.ddi_port_info
[PORT_D
].supports_hdmi
= 0;
1100 } else if (ddc_pin
== DDC_PIN_B
&& port
!= PORT_B
)
1101 DRM_DEBUG_KMS("Unexpected DDC pin for port B\n");
1102 else if (ddc_pin
== DDC_PIN_C
&& port
!= PORT_C
)
1103 DRM_DEBUG_KMS("Unexpected DDC pin for port C\n");
1104 else if (ddc_pin
== DDC_PIN_D
&& port
!= PORT_D
)
1105 DRM_DEBUG_KMS("Unexpected DDC pin for port D\n");
1109 if (port
== PORT_E
) {
1110 info
->alternate_aux_channel
= aux_channel
;
1111 /* if DDIE share aux channel with other port, then
1112 * DP couldn't exist on the shared port. Otherwise
1113 * they share the same aux channel and system
1114 * couldn't communicate with them seperately. */
1115 if (aux_channel
== DP_AUX_A
)
1116 dev_priv
->vbt
.ddi_port_info
[PORT_A
].supports_dp
= 0;
1117 else if (aux_channel
== DP_AUX_B
)
1118 dev_priv
->vbt
.ddi_port_info
[PORT_B
].supports_dp
= 0;
1119 else if (aux_channel
== DP_AUX_C
)
1120 dev_priv
->vbt
.ddi_port_info
[PORT_C
].supports_dp
= 0;
1121 else if (aux_channel
== DP_AUX_D
)
1122 dev_priv
->vbt
.ddi_port_info
[PORT_D
].supports_dp
= 0;
1124 else if (aux_channel
== DP_AUX_A
&& port
!= PORT_A
)
1125 DRM_DEBUG_KMS("Unexpected AUX channel for port A\n");
1126 else if (aux_channel
== DP_AUX_B
&& port
!= PORT_B
)
1127 DRM_DEBUG_KMS("Unexpected AUX channel for port B\n");
1128 else if (aux_channel
== DP_AUX_C
&& port
!= PORT_C
)
1129 DRM_DEBUG_KMS("Unexpected AUX channel for port C\n");
1130 else if (aux_channel
== DP_AUX_D
&& port
!= PORT_D
)
1131 DRM_DEBUG_KMS("Unexpected AUX channel for port D\n");
1134 if (bdb
->version
>= 158) {
1135 /* The VBT HDMI level shift values match the table we have. */
1136 hdmi_level_shift
= child
->raw
[7] & 0xF;
1137 DRM_DEBUG_KMS("VBT HDMI level shift for port %c: %d\n",
1140 info
->hdmi_level_shift
= hdmi_level_shift
;
1143 /* Parse the I_boost config for SKL and above */
1144 if (bdb
->version
>= 196 && child
->common
.iboost
) {
1145 info
->dp_boost_level
= translate_iboost(child
->common
.iboost_level
& 0xF);
1146 DRM_DEBUG_KMS("VBT (e)DP boost level for port %c: %d\n",
1147 port_name(port
), info
->dp_boost_level
);
1148 info
->hdmi_boost_level
= translate_iboost(child
->common
.iboost_level
>> 4);
1149 DRM_DEBUG_KMS("VBT HDMI boost level for port %c: %d\n",
1150 port_name(port
), info
->hdmi_boost_level
);
1154 static void parse_ddi_ports(struct drm_i915_private
*dev_priv
,
1155 const struct bdb_header
*bdb
)
1159 if (!HAS_DDI(dev_priv
))
1162 if (!dev_priv
->vbt
.child_dev_num
)
1165 if (bdb
->version
< 155)
1168 for (port
= PORT_A
; port
< I915_MAX_PORTS
; port
++)
1169 parse_ddi_port(dev_priv
, port
, bdb
);
1173 parse_device_mapping(struct drm_i915_private
*dev_priv
,
1174 const struct bdb_header
*bdb
)
1176 const struct bdb_general_definitions
*p_defs
;
1177 const union child_device_config
*p_child
;
1178 union child_device_config
*child_dev_ptr
;
1179 int i
, child_device_num
, count
;
1183 p_defs
= find_section(bdb
, BDB_GENERAL_DEFINITIONS
);
1185 DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
1188 if (bdb
->version
< 106) {
1190 } else if (bdb
->version
< 109) {
1192 } else if (bdb
->version
< 195) {
1193 BUILD_BUG_ON(sizeof(struct old_child_dev_config
) != 33);
1194 expected_size
= sizeof(struct old_child_dev_config
);
1195 } else if (bdb
->version
== 195) {
1197 } else if (bdb
->version
<= 197) {
1201 BUILD_BUG_ON(sizeof(*p_child
) < 38);
1202 DRM_DEBUG_DRIVER("Expected child device config size for VBT version %u not known; assuming %u\n",
1203 bdb
->version
, expected_size
);
1206 /* Flag an error for unexpected size, but continue anyway. */
1207 if (p_defs
->child_dev_size
!= expected_size
)
1208 DRM_ERROR("Unexpected child device config size %u (expected %u for VBT version %u)\n",
1209 p_defs
->child_dev_size
, expected_size
, bdb
->version
);
1211 /* The legacy sized child device config is the minimum we need. */
1212 if (p_defs
->child_dev_size
< sizeof(struct old_child_dev_config
)) {
1213 DRM_DEBUG_KMS("Child device config size %u is too small.\n",
1214 p_defs
->child_dev_size
);
1218 /* get the block size of general definitions */
1219 block_size
= get_blocksize(p_defs
);
1220 /* get the number of child device */
1221 child_device_num
= (block_size
- sizeof(*p_defs
)) /
1222 p_defs
->child_dev_size
;
1224 /* get the number of child device that is present */
1225 for (i
= 0; i
< child_device_num
; i
++) {
1226 p_child
= child_device_ptr(p_defs
, i
);
1227 if (!p_child
->common
.device_type
) {
1228 /* skip the device block if device type is invalid */
1234 DRM_DEBUG_KMS("no child dev is parsed from VBT\n");
1237 dev_priv
->vbt
.child_dev
= kcalloc(count
, sizeof(*p_child
), GFP_KERNEL
);
1238 if (!dev_priv
->vbt
.child_dev
) {
1239 DRM_DEBUG_KMS("No memory space for child device\n");
1243 dev_priv
->vbt
.child_dev_num
= count
;
1245 for (i
= 0; i
< child_device_num
; i
++) {
1246 p_child
= child_device_ptr(p_defs
, i
);
1247 if (!p_child
->common
.device_type
) {
1248 /* skip the device block if device type is invalid */
1252 child_dev_ptr
= dev_priv
->vbt
.child_dev
+ count
;
1256 * Copy as much as we know (sizeof) and is available
1257 * (child_dev_size) of the child device. Accessing the data must
1258 * depend on VBT version.
1260 memcpy(child_dev_ptr
, p_child
,
1261 min_t(size_t, p_defs
->child_dev_size
, sizeof(*p_child
)));
1264 * copied full block, now init values when they are not
1265 * available in current version
1267 if (bdb
->version
< 196) {
1268 /* Set default values for bits added from v196 */
1269 child_dev_ptr
->common
.iboost
= 0;
1270 child_dev_ptr
->common
.hpd_invert
= 0;
1273 if (bdb
->version
< 192)
1274 child_dev_ptr
->common
.lspcon
= 0;
1280 init_vbt_defaults(struct drm_i915_private
*dev_priv
)
1284 dev_priv
->vbt
.crt_ddc_pin
= GMBUS_PIN_VGADDC
;
1286 /* Default to having backlight */
1287 dev_priv
->vbt
.backlight
.present
= true;
1289 /* LFP panel data */
1290 dev_priv
->vbt
.lvds_dither
= 1;
1291 dev_priv
->vbt
.lvds_vbt
= 0;
1293 /* SDVO panel data */
1294 dev_priv
->vbt
.sdvo_lvds_vbt_mode
= NULL
;
1296 /* general features */
1297 dev_priv
->vbt
.int_tv_support
= 1;
1298 dev_priv
->vbt
.int_crt_support
= 1;
1300 /* Default to using SSC */
1301 dev_priv
->vbt
.lvds_use_ssc
= 1;
1303 * Core/SandyBridge/IvyBridge use alternative (120MHz) reference
1306 dev_priv
->vbt
.lvds_ssc_freq
= intel_bios_ssc_frequency(dev_priv
,
1307 !HAS_PCH_SPLIT(dev_priv
));
1308 DRM_DEBUG_KMS("Set default to SSC at %d kHz\n", dev_priv
->vbt
.lvds_ssc_freq
);
1310 for (port
= PORT_A
; port
< I915_MAX_PORTS
; port
++) {
1311 struct ddi_vbt_port_info
*info
=
1312 &dev_priv
->vbt
.ddi_port_info
[port
];
1314 info
->hdmi_level_shift
= HDMI_LEVEL_SHIFT_UNKNOWN
;
1316 info
->supports_dvi
= (port
!= PORT_A
&& port
!= PORT_E
);
1317 info
->supports_hdmi
= info
->supports_dvi
;
1318 info
->supports_dp
= (port
!= PORT_E
);
1322 static const struct bdb_header
*get_bdb_header(const struct vbt_header
*vbt
)
1324 const void *_vbt
= vbt
;
1326 return _vbt
+ vbt
->bdb_offset
;
1330 * intel_bios_is_valid_vbt - does the given buffer contain a valid VBT
1331 * @buf: pointer to a buffer to validate
1332 * @size: size of the buffer
1334 * Returns true on valid VBT.
1336 bool intel_bios_is_valid_vbt(const void *buf
, size_t size
)
1338 const struct vbt_header
*vbt
= buf
;
1339 const struct bdb_header
*bdb
;
1344 if (sizeof(struct vbt_header
) > size
) {
1345 DRM_DEBUG_DRIVER("VBT header incomplete\n");
1349 if (memcmp(vbt
->signature
, "$VBT", 4)) {
1350 DRM_DEBUG_DRIVER("VBT invalid signature\n");
1354 if (vbt
->bdb_offset
+ sizeof(struct bdb_header
) > size
) {
1355 DRM_DEBUG_DRIVER("BDB header incomplete\n");
1359 bdb
= get_bdb_header(vbt
);
1360 if (vbt
->bdb_offset
+ bdb
->bdb_size
> size
) {
1361 DRM_DEBUG_DRIVER("BDB incomplete\n");
1368 static const struct vbt_header
*find_vbt(void __iomem
*bios
, size_t size
)
1372 /* Scour memory looking for the VBT signature. */
1373 for (i
= 0; i
+ 4 < size
; i
++) {
1376 if (ioread32(bios
+ i
) != *((const u32
*) "$VBT"))
1380 * This is the one place where we explicitly discard the address
1381 * space (__iomem) of the BIOS/VBT.
1383 vbt
= (void __force
*) bios
+ i
;
1384 if (intel_bios_is_valid_vbt(vbt
, size
- i
))
1394 * intel_bios_init - find VBT and initialize settings from the BIOS
1395 * @dev_priv: i915 device instance
1397 * Loads the Video BIOS and checks that the VBT exists. Sets scratch registers
1398 * to appropriate values.
1400 * Returns 0 on success, nonzero on failure.
1403 intel_bios_init(struct drm_i915_private
*dev_priv
)
1405 struct pci_dev
*pdev
= dev_priv
->dev
->pdev
;
1406 const struct vbt_header
*vbt
= dev_priv
->opregion
.vbt
;
1407 const struct bdb_header
*bdb
;
1408 u8 __iomem
*bios
= NULL
;
1410 if (HAS_PCH_NOP(dev_priv
))
1413 init_vbt_defaults(dev_priv
);
1418 bios
= pci_map_rom(pdev
, &size
);
1422 vbt
= find_vbt(bios
, size
);
1424 pci_unmap_rom(pdev
, bios
);
1428 DRM_DEBUG_KMS("Found valid VBT in PCI ROM\n");
1431 bdb
= get_bdb_header(vbt
);
1433 DRM_DEBUG_KMS("VBT signature \"%.*s\", BDB version %d\n",
1434 (int)sizeof(vbt
->signature
), vbt
->signature
, bdb
->version
);
1436 /* Grab useful general definitions */
1437 parse_general_features(dev_priv
, bdb
);
1438 parse_general_definitions(dev_priv
, bdb
);
1439 parse_lfp_panel_data(dev_priv
, bdb
);
1440 parse_lfp_backlight(dev_priv
, bdb
);
1441 parse_sdvo_panel_data(dev_priv
, bdb
);
1442 parse_sdvo_device_mapping(dev_priv
, bdb
);
1443 parse_device_mapping(dev_priv
, bdb
);
1444 parse_driver_features(dev_priv
, bdb
);
1445 parse_edp(dev_priv
, bdb
);
1446 parse_psr(dev_priv
, bdb
);
1447 parse_mipi_config(dev_priv
, bdb
);
1448 parse_mipi_sequence(dev_priv
, bdb
);
1449 parse_ddi_ports(dev_priv
, bdb
);
1452 pci_unmap_rom(pdev
, bios
);
1458 * intel_bios_is_tv_present - is integrated TV present in VBT
1459 * @dev_priv: i915 device instance
1461 * Return true if TV is present. If no child devices were parsed from VBT,
1462 * assume TV is present.
1464 bool intel_bios_is_tv_present(struct drm_i915_private
*dev_priv
)
1466 union child_device_config
*p_child
;
1469 if (!dev_priv
->vbt
.int_tv_support
)
1472 if (!dev_priv
->vbt
.child_dev_num
)
1475 for (i
= 0; i
< dev_priv
->vbt
.child_dev_num
; i
++) {
1476 p_child
= dev_priv
->vbt
.child_dev
+ i
;
1478 * If the device type is not TV, continue.
1480 switch (p_child
->old
.device_type
) {
1481 case DEVICE_TYPE_INT_TV
:
1482 case DEVICE_TYPE_TV
:
1483 case DEVICE_TYPE_TV_SVIDEO_COMPOSITE
:
1488 /* Only when the addin_offset is non-zero, it is regarded
1491 if (p_child
->old
.addin_offset
)
1499 * intel_bios_is_lvds_present - is LVDS present in VBT
1500 * @dev_priv: i915 device instance
1501 * @i2c_pin: i2c pin for LVDS if present
1503 * Return true if LVDS is present. If no child devices were parsed from VBT,
1504 * assume LVDS is present.
1506 bool intel_bios_is_lvds_present(struct drm_i915_private
*dev_priv
, u8
*i2c_pin
)
1510 if (!dev_priv
->vbt
.child_dev_num
)
1513 for (i
= 0; i
< dev_priv
->vbt
.child_dev_num
; i
++) {
1514 union child_device_config
*uchild
= dev_priv
->vbt
.child_dev
+ i
;
1515 struct old_child_dev_config
*child
= &uchild
->old
;
1517 /* If the device type is not LFP, continue.
1518 * We have to check both the new identifiers as well as the
1519 * old for compatibility with some BIOSes.
1521 if (child
->device_type
!= DEVICE_TYPE_INT_LFP
&&
1522 child
->device_type
!= DEVICE_TYPE_LFP
)
1525 if (intel_gmbus_is_valid_pin(dev_priv
, child
->i2c_pin
))
1526 *i2c_pin
= child
->i2c_pin
;
1528 /* However, we cannot trust the BIOS writers to populate
1529 * the VBT correctly. Since LVDS requires additional
1530 * information from AIM blocks, a non-zero addin offset is
1531 * a good indicator that the LVDS is actually present.
1533 if (child
->addin_offset
)
1536 /* But even then some BIOS writers perform some black magic
1537 * and instantiate the device without reference to any
1538 * additional data. Trust that if the VBT was written into
1539 * the OpRegion then they have validated the LVDS's existence.
1541 if (dev_priv
->opregion
.vbt
)
1549 * intel_bios_is_port_edp - is the device in given port eDP
1550 * @dev_priv: i915 device instance
1551 * @port: port to check
1553 * Return true if the device in %port is eDP.
1555 bool intel_bios_is_port_edp(struct drm_i915_private
*dev_priv
, enum port port
)
1557 union child_device_config
*p_child
;
1558 static const short port_mapping
[] = {
1559 [PORT_B
] = DVO_PORT_DPB
,
1560 [PORT_C
] = DVO_PORT_DPC
,
1561 [PORT_D
] = DVO_PORT_DPD
,
1562 [PORT_E
] = DVO_PORT_DPE
,
1566 if (!dev_priv
->vbt
.child_dev_num
)
1569 for (i
= 0; i
< dev_priv
->vbt
.child_dev_num
; i
++) {
1570 p_child
= dev_priv
->vbt
.child_dev
+ i
;
1572 if (p_child
->common
.dvo_port
== port_mapping
[port
] &&
1573 (p_child
->common
.device_type
& DEVICE_TYPE_eDP_BITS
) ==
1574 (DEVICE_TYPE_eDP
& DEVICE_TYPE_eDP_BITS
))
1582 * intel_bios_is_dsi_present - is DSI present in VBT
1583 * @dev_priv: i915 device instance
1584 * @port: port for DSI if present
1586 * Return true if DSI is present, and return the port in %port.
1588 bool intel_bios_is_dsi_present(struct drm_i915_private
*dev_priv
,
1591 union child_device_config
*p_child
;
1595 for (i
= 0; i
< dev_priv
->vbt
.child_dev_num
; i
++) {
1596 p_child
= dev_priv
->vbt
.child_dev
+ i
;
1598 if (!(p_child
->common
.device_type
& DEVICE_TYPE_MIPI_OUTPUT
))
1601 dvo_port
= p_child
->common
.dvo_port
;
1604 case DVO_PORT_MIPIA
:
1605 case DVO_PORT_MIPIC
:
1607 *port
= dvo_port
- DVO_PORT_MIPIA
;
1609 case DVO_PORT_MIPIB
:
1610 case DVO_PORT_MIPID
:
1611 DRM_DEBUG_KMS("VBT has unsupported DSI port %c\n",
1612 port_name(dvo_port
- DVO_PORT_MIPIA
));
1621 * intel_bios_is_port_hpd_inverted - is HPD inverted for %port
1622 * @dev_priv: i915 device instance
1623 * @port: port to check
1625 * Return true if HPD should be inverted for %port.
1628 intel_bios_is_port_hpd_inverted(struct drm_i915_private
*dev_priv
,
1633 if (WARN_ON_ONCE(!IS_BROXTON(dev_priv
)))
1636 for (i
= 0; i
< dev_priv
->vbt
.child_dev_num
; i
++) {
1637 if (!dev_priv
->vbt
.child_dev
[i
].common
.hpd_invert
)
1640 switch (dev_priv
->vbt
.child_dev
[i
].common
.dvo_port
) {
1642 case DVO_PORT_HDMIA
:
1647 case DVO_PORT_HDMIB
:
1652 case DVO_PORT_HDMIC
: