2 * Copyright (c) 2006 Luc Verhaegen (quirks list)
3 * Copyright (c) 2007-2008 Intel Corporation
4 * Jesse Barnes <jesse.barnes@intel.com>
5 * Copyright 2010 Red Hat, Inc.
7 * DDC probing routines (drm_ddc_read & drm_do_probe_ddc_edid) originally from
9 * Copyright (C) 2006 Dennis Munsie <dmunsie@cecropia.com>
11 * Permission is hereby granted, free of charge, to any person obtaining a
12 * copy of this software and associated documentation files (the "Software"),
13 * to deal in the Software without restriction, including without limitation
14 * the rights to use, copy, modify, merge, publish, distribute, sub license,
15 * and/or sell copies of the Software, and to permit persons to whom the
16 * Software is furnished to do so, subject to the following conditions:
18 * The above copyright notice and this permission notice (including the
19 * next paragraph) shall be included in all copies or substantial portions
22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
23 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
24 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
25 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
26 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
27 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
28 * DEALINGS IN THE SOFTWARE.
30 #include <linux/kernel.h>
31 #include <linux/slab.h>
32 #include <linux/i2c.h>
33 #include <linux/module.h>
35 #include <drm/drm_edid.h>
36 #include "drm_edid_modes.h"
38 #define version_greater(edid, maj, min) \
39 (((edid)->version > (maj)) || \
40 ((edid)->version == (maj) && (edid)->revision > (min)))
42 #define EDID_EST_TIMINGS 16
43 #define EDID_STD_TIMINGS 8
44 #define EDID_DETAILED_TIMINGS 4
47 * EDID blocks out in the wild have a variety of bugs, try to collect
48 * them here (note that userspace may work around broken monitors first,
49 * but fixes should make their way here so that the kernel "just works"
50 * on as many displays as possible).
53 /* First detailed mode wrong, use largest 60Hz mode */
54 #define EDID_QUIRK_PREFER_LARGE_60 (1 << 0)
55 /* Reported 135MHz pixel clock is too high, needs adjustment */
56 #define EDID_QUIRK_135_CLOCK_TOO_HIGH (1 << 1)
57 /* Prefer the largest mode at 75 Hz */
58 #define EDID_QUIRK_PREFER_LARGE_75 (1 << 2)
59 /* Detail timing is in cm not mm */
60 #define EDID_QUIRK_DETAILED_IN_CM (1 << 3)
61 /* Detailed timing descriptors have bogus size values, so just take the
62 * maximum size and use that.
64 #define EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE (1 << 4)
65 /* Monitor forgot to set the first detailed is preferred bit. */
66 #define EDID_QUIRK_FIRST_DETAILED_PREFERRED (1 << 5)
67 /* use +hsync +vsync for detailed mode */
68 #define EDID_QUIRK_DETAILED_SYNC_PP (1 << 6)
69 /* Force reduced-blanking timings for detailed modes */
70 #define EDID_QUIRK_FORCE_REDUCED_BLANKING (1 << 7)
72 struct detailed_mode_closure
{
73 struct drm_connector
*connector
;
85 static struct edid_quirk
{
89 } edid_quirk_list
[] = {
91 { "ACI", 0x22a2, EDID_QUIRK_FORCE_REDUCED_BLANKING
},
94 { "ACR", 44358, EDID_QUIRK_PREFER_LARGE_60
},
96 { "API", 0x7602, EDID_QUIRK_PREFER_LARGE_60
},
98 { "ACR", 2423, EDID_QUIRK_FIRST_DETAILED_PREFERRED
},
100 /* Belinea 10 15 55 */
101 { "MAX", 1516, EDID_QUIRK_PREFER_LARGE_60
},
102 { "MAX", 0x77e, EDID_QUIRK_PREFER_LARGE_60
},
104 /* Envision Peripherals, Inc. EN-7100e */
105 { "EPI", 59264, EDID_QUIRK_135_CLOCK_TOO_HIGH
},
106 /* Envision EN2028 */
107 { "EPI", 8232, EDID_QUIRK_PREFER_LARGE_60
},
109 /* Funai Electronics PM36B */
110 { "FCM", 13600, EDID_QUIRK_PREFER_LARGE_75
|
111 EDID_QUIRK_DETAILED_IN_CM
},
113 /* LG Philips LCD LP154W01-A5 */
114 { "LPL", 0, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE
},
115 { "LPL", 0x2a00, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE
},
117 /* Philips 107p5 CRT */
118 { "PHL", 57364, EDID_QUIRK_FIRST_DETAILED_PREFERRED
},
121 { "PTS", 765, EDID_QUIRK_FIRST_DETAILED_PREFERRED
},
123 /* Samsung SyncMaster 205BW. Note: irony */
124 { "SAM", 541, EDID_QUIRK_DETAILED_SYNC_PP
},
125 /* Samsung SyncMaster 22[5-6]BW */
126 { "SAM", 596, EDID_QUIRK_PREFER_LARGE_60
},
127 { "SAM", 638, EDID_QUIRK_PREFER_LARGE_60
},
129 /* ViewSonic VA2026w */
130 { "VSC", 5020, EDID_QUIRK_FORCE_REDUCED_BLANKING
},
133 /*** DDC fetch and block validation ***/
135 static const u8 edid_header
[] = {
136 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00
140 * Sanity check the header of the base EDID block. Return 8 if the header
141 * is perfect, down to 0 if it's totally wrong.
143 int drm_edid_header_is_valid(const u8
*raw_edid
)
147 for (i
= 0; i
< sizeof(edid_header
); i
++)
148 if (raw_edid
[i
] == edid_header
[i
])
153 EXPORT_SYMBOL(drm_edid_header_is_valid
);
155 static int edid_fixup __read_mostly
= 6;
156 module_param_named(edid_fixup
, edid_fixup
, int, 0400);
157 MODULE_PARM_DESC(edid_fixup
,
158 "Minimum number of valid EDID header bytes (0-8, default 6)");
161 * Sanity check the EDID block (base or extension). Return 0 if the block
162 * doesn't check out, or 1 if it's valid.
164 bool drm_edid_block_valid(u8
*raw_edid
, int block
, bool print_bad_edid
)
168 struct edid
*edid
= (struct edid
*)raw_edid
;
170 if (edid_fixup
> 8 || edid_fixup
< 0)
174 int score
= drm_edid_header_is_valid(raw_edid
);
176 else if (score
>= edid_fixup
) {
177 DRM_DEBUG("Fixing EDID header, your hardware may be failing\n");
178 memcpy(raw_edid
, edid_header
, sizeof(edid_header
));
184 for (i
= 0; i
< EDID_LENGTH
; i
++)
187 if (print_bad_edid
) {
188 DRM_ERROR("EDID checksum is invalid, remainder is %d\n", csum
);
191 /* allow CEA to slide through, switches mangle this */
192 if (raw_edid
[0] != 0x02)
196 /* per-block-type checks */
197 switch (raw_edid
[0]) {
199 if (edid
->version
!= 1) {
200 DRM_ERROR("EDID has major version %d, instead of 1\n", edid
->version
);
204 if (edid
->revision
> 4)
205 DRM_DEBUG("EDID minor > 4, assuming backward compatibility\n");
215 if (raw_edid
&& print_bad_edid
) {
216 printk(KERN_ERR
"Raw EDID:\n");
217 print_hex_dump(KERN_ERR
, " \t", DUMP_PREFIX_NONE
, 16, 1,
218 raw_edid
, EDID_LENGTH
, false);
222 EXPORT_SYMBOL(drm_edid_block_valid
);
225 * drm_edid_is_valid - sanity check EDID data
228 * Sanity-check an entire EDID record (including extensions)
230 bool drm_edid_is_valid(struct edid
*edid
)
233 u8
*raw
= (u8
*)edid
;
238 for (i
= 0; i
<= edid
->extensions
; i
++)
239 if (!drm_edid_block_valid(raw
+ i
* EDID_LENGTH
, i
, true))
244 EXPORT_SYMBOL(drm_edid_is_valid
);
246 #define DDC_SEGMENT_ADDR 0x30
248 * Get EDID information via I2C.
250 * \param adapter : i2c device adaptor
251 * \param buf : EDID data buffer to be filled
252 * \param len : EDID data buffer length
253 * \return 0 on success or -1 on failure.
255 * Try to fetch EDID information by calling i2c driver function.
258 drm_do_probe_ddc_edid(struct i2c_adapter
*adapter
, unsigned char *buf
,
261 unsigned char start
= block
* EDID_LENGTH
;
262 unsigned char segment
= block
>> 1;
263 unsigned char xfers
= segment
? 3 : 2;
264 int ret
, retries
= 5;
266 /* The core i2c driver will automatically retry the transfer if the
267 * adapter reports EAGAIN. However, we find that bit-banging transfers
268 * are susceptible to errors under a heavily loaded machine and
269 * generate spurious NAKs and timeouts. Retrying the transfer
270 * of the individual block a few times seems to overcome this.
273 struct i2c_msg msgs
[] = {
275 .addr
= DDC_SEGMENT_ADDR
,
293 * Avoid sending the segment addr to not upset non-compliant ddc
296 ret
= i2c_transfer(adapter
, &msgs
[3 - xfers
], xfers
);
299 DRM_DEBUG_KMS("drm: skipping non-existent adapter %s\n",
303 } while (ret
!= xfers
&& --retries
);
305 return ret
== xfers
? 0 : -1;
308 static bool drm_edid_is_zero(u8
*in_edid
, int length
)
311 u32
*raw_edid
= (u32
*)in_edid
;
313 for (i
= 0; i
< length
/ 4; i
++)
314 if (*(raw_edid
+ i
) != 0)
320 drm_do_get_edid(struct drm_connector
*connector
, struct i2c_adapter
*adapter
)
322 int i
, j
= 0, valid_extensions
= 0;
324 bool print_bad_edid
= !connector
->bad_edid_counter
|| (drm_debug
& DRM_UT_KMS
);
326 if ((block
= kmalloc(EDID_LENGTH
, GFP_KERNEL
)) == NULL
)
329 /* base block fetch */
330 for (i
= 0; i
< 4; i
++) {
331 if (drm_do_probe_ddc_edid(adapter
, block
, 0, EDID_LENGTH
))
333 if (drm_edid_block_valid(block
, 0, print_bad_edid
))
335 if (i
== 0 && drm_edid_is_zero(block
, EDID_LENGTH
)) {
336 connector
->null_edid_counter
++;
343 /* if there's no extensions, we're done */
344 if (block
[0x7e] == 0)
347 new = krealloc(block
, (block
[0x7e] + 1) * EDID_LENGTH
, GFP_KERNEL
);
352 for (j
= 1; j
<= block
[0x7e]; j
++) {
353 for (i
= 0; i
< 4; i
++) {
354 if (drm_do_probe_ddc_edid(adapter
,
355 block
+ (valid_extensions
+ 1) * EDID_LENGTH
,
358 if (drm_edid_block_valid(block
+ (valid_extensions
+ 1) * EDID_LENGTH
, j
, print_bad_edid
)) {
364 dev_warn(connector
->dev
->dev
,
365 "%s: Ignoring invalid EDID block %d.\n",
366 drm_get_connector_name(connector
), j
);
369 if (valid_extensions
!= block
[0x7e]) {
370 block
[EDID_LENGTH
-1] += block
[0x7e] - valid_extensions
;
371 block
[0x7e] = valid_extensions
;
372 new = krealloc(block
, (valid_extensions
+ 1) * EDID_LENGTH
, GFP_KERNEL
);
381 if (print_bad_edid
) {
382 dev_warn(connector
->dev
->dev
, "%s: EDID block %d invalid.\n",
383 drm_get_connector_name(connector
), j
);
385 connector
->bad_edid_counter
++;
393 * Probe DDC presence.
395 * \param adapter : i2c device adaptor
396 * \return 1 on success
399 drm_probe_ddc(struct i2c_adapter
*adapter
)
403 return (drm_do_probe_ddc_edid(adapter
, &out
, 0, 1) == 0);
405 EXPORT_SYMBOL(drm_probe_ddc
);
408 * drm_get_edid - get EDID data, if available
409 * @connector: connector we're probing
410 * @adapter: i2c adapter to use for DDC
412 * Poke the given i2c channel to grab EDID data if possible. If found,
413 * attach it to the connector.
415 * Return edid data or NULL if we couldn't find any.
417 struct edid
*drm_get_edid(struct drm_connector
*connector
,
418 struct i2c_adapter
*adapter
)
420 struct edid
*edid
= NULL
;
422 if (drm_probe_ddc(adapter
))
423 edid
= (struct edid
*)drm_do_get_edid(connector
, adapter
);
427 EXPORT_SYMBOL(drm_get_edid
);
429 /*** EDID parsing ***/
432 * edid_vendor - match a string against EDID's obfuscated vendor field
433 * @edid: EDID to match
434 * @vendor: vendor string
436 * Returns true if @vendor is in @edid, false otherwise
438 static bool edid_vendor(struct edid
*edid
, char *vendor
)
442 edid_vendor
[0] = ((edid
->mfg_id
[0] & 0x7c) >> 2) + '@';
443 edid_vendor
[1] = (((edid
->mfg_id
[0] & 0x3) << 3) |
444 ((edid
->mfg_id
[1] & 0xe0) >> 5)) + '@';
445 edid_vendor
[2] = (edid
->mfg_id
[1] & 0x1f) + '@';
447 return !strncmp(edid_vendor
, vendor
, 3);
451 * edid_get_quirks - return quirk flags for a given EDID
452 * @edid: EDID to process
454 * This tells subsequent routines what fixes they need to apply.
456 static u32
edid_get_quirks(struct edid
*edid
)
458 struct edid_quirk
*quirk
;
461 for (i
= 0; i
< ARRAY_SIZE(edid_quirk_list
); i
++) {
462 quirk
= &edid_quirk_list
[i
];
464 if (edid_vendor(edid
, quirk
->vendor
) &&
465 (EDID_PRODUCT_ID(edid
) == quirk
->product_id
))
466 return quirk
->quirks
;
472 #define MODE_SIZE(m) ((m)->hdisplay * (m)->vdisplay)
473 #define MODE_REFRESH_DIFF(m,r) (abs((m)->vrefresh - target_refresh))
476 * edid_fixup_preferred - set preferred modes based on quirk list
477 * @connector: has mode list to fix up
478 * @quirks: quirks list
480 * Walk the mode list for @connector, clearing the preferred status
481 * on existing modes and setting it anew for the right mode ala @quirks.
483 static void edid_fixup_preferred(struct drm_connector
*connector
,
486 struct drm_display_mode
*t
, *cur_mode
, *preferred_mode
;
487 int target_refresh
= 0;
489 if (list_empty(&connector
->probed_modes
))
492 if (quirks
& EDID_QUIRK_PREFER_LARGE_60
)
494 if (quirks
& EDID_QUIRK_PREFER_LARGE_75
)
497 preferred_mode
= list_first_entry(&connector
->probed_modes
,
498 struct drm_display_mode
, head
);
500 list_for_each_entry_safe(cur_mode
, t
, &connector
->probed_modes
, head
) {
501 cur_mode
->type
&= ~DRM_MODE_TYPE_PREFERRED
;
503 if (cur_mode
== preferred_mode
)
506 /* Largest mode is preferred */
507 if (MODE_SIZE(cur_mode
) > MODE_SIZE(preferred_mode
))
508 preferred_mode
= cur_mode
;
510 /* At a given size, try to get closest to target refresh */
511 if ((MODE_SIZE(cur_mode
) == MODE_SIZE(preferred_mode
)) &&
512 MODE_REFRESH_DIFF(cur_mode
, target_refresh
) <
513 MODE_REFRESH_DIFF(preferred_mode
, target_refresh
)) {
514 preferred_mode
= cur_mode
;
518 preferred_mode
->type
|= DRM_MODE_TYPE_PREFERRED
;
522 mode_is_rb(const struct drm_display_mode
*mode
)
524 return (mode
->htotal
- mode
->hdisplay
== 160) &&
525 (mode
->hsync_end
- mode
->hdisplay
== 80) &&
526 (mode
->hsync_end
- mode
->hsync_start
== 32) &&
527 (mode
->vsync_start
- mode
->vdisplay
== 3);
531 * drm_mode_find_dmt - Create a copy of a mode if present in DMT
532 * @dev: Device to duplicate against
534 * @vsize: Mode height
535 * @fresh: Mode refresh rate
536 * @rb: Mode reduced-blanking-ness
538 * Walk the DMT mode list looking for a match for the given parameters.
539 * Return a newly allocated copy of the mode, or NULL if not found.
541 struct drm_display_mode
*drm_mode_find_dmt(struct drm_device
*dev
,
542 int hsize
, int vsize
, int fresh
,
547 for (i
= 0; i
< drm_num_dmt_modes
; i
++) {
548 const struct drm_display_mode
*ptr
= &drm_dmt_modes
[i
];
549 if (hsize
!= ptr
->hdisplay
)
551 if (vsize
!= ptr
->vdisplay
)
553 if (fresh
!= drm_mode_vrefresh(ptr
))
555 if (rb
!= mode_is_rb(ptr
))
558 return drm_mode_duplicate(dev
, ptr
);
563 EXPORT_SYMBOL(drm_mode_find_dmt
);
565 typedef void detailed_cb(struct detailed_timing
*timing
, void *closure
);
568 cea_for_each_detailed_block(u8
*ext
, detailed_cb
*cb
, void *closure
)
572 u8
*det_base
= ext
+ d
;
575 for (i
= 0; i
< n
; i
++)
576 cb((struct detailed_timing
*)(det_base
+ 18 * i
), closure
);
580 vtb_for_each_detailed_block(u8
*ext
, detailed_cb
*cb
, void *closure
)
582 unsigned int i
, n
= min((int)ext
[0x02], 6);
583 u8
*det_base
= ext
+ 5;
586 return; /* unknown version */
588 for (i
= 0; i
< n
; i
++)
589 cb((struct detailed_timing
*)(det_base
+ 18 * i
), closure
);
593 drm_for_each_detailed_block(u8
*raw_edid
, detailed_cb
*cb
, void *closure
)
596 struct edid
*edid
= (struct edid
*)raw_edid
;
601 for (i
= 0; i
< EDID_DETAILED_TIMINGS
; i
++)
602 cb(&(edid
->detailed_timings
[i
]), closure
);
604 for (i
= 1; i
<= raw_edid
[0x7e]; i
++) {
605 u8
*ext
= raw_edid
+ (i
* EDID_LENGTH
);
608 cea_for_each_detailed_block(ext
, cb
, closure
);
611 vtb_for_each_detailed_block(ext
, cb
, closure
);
620 is_rb(struct detailed_timing
*t
, void *data
)
623 if (r
[3] == EDID_DETAIL_MONITOR_RANGE
)
625 *(bool *)data
= true;
628 /* EDID 1.4 defines this explicitly. For EDID 1.3, we guess, badly. */
630 drm_monitor_supports_rb(struct edid
*edid
)
632 if (edid
->revision
>= 4) {
634 drm_for_each_detailed_block((u8
*)edid
, is_rb
, &ret
);
638 return ((edid
->input
& DRM_EDID_INPUT_DIGITAL
) != 0);
642 find_gtf2(struct detailed_timing
*t
, void *data
)
645 if (r
[3] == EDID_DETAIL_MONITOR_RANGE
&& r
[10] == 0x02)
649 /* Secondary GTF curve kicks in above some break frequency */
651 drm_gtf2_hbreak(struct edid
*edid
)
654 drm_for_each_detailed_block((u8
*)edid
, find_gtf2
, &r
);
655 return r
? (r
[12] * 2) : 0;
659 drm_gtf2_2c(struct edid
*edid
)
662 drm_for_each_detailed_block((u8
*)edid
, find_gtf2
, &r
);
663 return r
? r
[13] : 0;
667 drm_gtf2_m(struct edid
*edid
)
670 drm_for_each_detailed_block((u8
*)edid
, find_gtf2
, &r
);
671 return r
? (r
[15] << 8) + r
[14] : 0;
675 drm_gtf2_k(struct edid
*edid
)
678 drm_for_each_detailed_block((u8
*)edid
, find_gtf2
, &r
);
679 return r
? r
[16] : 0;
683 drm_gtf2_2j(struct edid
*edid
)
686 drm_for_each_detailed_block((u8
*)edid
, find_gtf2
, &r
);
687 return r
? r
[17] : 0;
691 * standard_timing_level - get std. timing level(CVT/GTF/DMT)
692 * @edid: EDID block to scan
694 static int standard_timing_level(struct edid
*edid
)
696 if (edid
->revision
>= 2) {
697 if (edid
->revision
>= 4 && (edid
->features
& DRM_EDID_FEATURE_DEFAULT_GTF
))
699 if (drm_gtf2_hbreak(edid
))
707 * 0 is reserved. The spec says 0x01 fill for unused timings. Some old
708 * monitors fill with ascii space (0x20) instead.
711 bad_std_timing(u8 a
, u8 b
)
713 return (a
== 0x00 && b
== 0x00) ||
714 (a
== 0x01 && b
== 0x01) ||
715 (a
== 0x20 && b
== 0x20);
719 * drm_mode_std - convert standard mode info (width, height, refresh) into mode
720 * @t: standard timing params
721 * @timing_level: standard timing level
723 * Take the standard timing params (in this case width, aspect, and refresh)
724 * and convert them into a real mode using CVT/GTF/DMT.
726 static struct drm_display_mode
*
727 drm_mode_std(struct drm_connector
*connector
, struct edid
*edid
,
728 struct std_timing
*t
, int revision
)
730 struct drm_device
*dev
= connector
->dev
;
731 struct drm_display_mode
*m
, *mode
= NULL
;
734 unsigned aspect_ratio
= (t
->vfreq_aspect
& EDID_TIMING_ASPECT_MASK
)
735 >> EDID_TIMING_ASPECT_SHIFT
;
736 unsigned vfreq
= (t
->vfreq_aspect
& EDID_TIMING_VFREQ_MASK
)
737 >> EDID_TIMING_VFREQ_SHIFT
;
738 int timing_level
= standard_timing_level(edid
);
740 if (bad_std_timing(t
->hsize
, t
->vfreq_aspect
))
743 /* According to the EDID spec, the hdisplay = hsize * 8 + 248 */
744 hsize
= t
->hsize
* 8 + 248;
745 /* vrefresh_rate = vfreq + 60 */
746 vrefresh_rate
= vfreq
+ 60;
747 /* the vdisplay is calculated based on the aspect ratio */
748 if (aspect_ratio
== 0) {
752 vsize
= (hsize
* 10) / 16;
753 } else if (aspect_ratio
== 1)
754 vsize
= (hsize
* 3) / 4;
755 else if (aspect_ratio
== 2)
756 vsize
= (hsize
* 4) / 5;
758 vsize
= (hsize
* 9) / 16;
760 /* HDTV hack, part 1 */
761 if (vrefresh_rate
== 60 &&
762 ((hsize
== 1360 && vsize
== 765) ||
763 (hsize
== 1368 && vsize
== 769))) {
769 * If this connector already has a mode for this size and refresh
770 * rate (because it came from detailed or CVT info), use that
771 * instead. This way we don't have to guess at interlace or
774 list_for_each_entry(m
, &connector
->probed_modes
, head
)
775 if (m
->hdisplay
== hsize
&& m
->vdisplay
== vsize
&&
776 drm_mode_vrefresh(m
) == vrefresh_rate
)
779 /* HDTV hack, part 2 */
780 if (hsize
== 1366 && vsize
== 768 && vrefresh_rate
== 60) {
781 mode
= drm_cvt_mode(dev
, 1366, 768, vrefresh_rate
, 0, 0,
783 mode
->hdisplay
= 1366;
784 mode
->hsync_start
= mode
->hsync_start
- 1;
785 mode
->hsync_end
= mode
->hsync_end
- 1;
789 /* check whether it can be found in default mode table */
790 if (drm_monitor_supports_rb(edid
)) {
791 mode
= drm_mode_find_dmt(dev
, hsize
, vsize
, vrefresh_rate
,
796 mode
= drm_mode_find_dmt(dev
, hsize
, vsize
, vrefresh_rate
, false);
800 /* okay, generate it */
801 switch (timing_level
) {
805 mode
= drm_gtf_mode(dev
, hsize
, vsize
, vrefresh_rate
, 0, 0);
809 * This is potentially wrong if there's ever a monitor with
810 * more than one ranges section, each claiming a different
811 * secondary GTF curve. Please don't do that.
813 mode
= drm_gtf_mode(dev
, hsize
, vsize
, vrefresh_rate
, 0, 0);
816 if (drm_mode_hsync(mode
) > drm_gtf2_hbreak(edid
)) {
817 drm_mode_destroy(dev
, mode
);
818 mode
= drm_gtf_mode_complex(dev
, hsize
, vsize
,
827 mode
= drm_cvt_mode(dev
, hsize
, vsize
, vrefresh_rate
, 0, 0,
835 * EDID is delightfully ambiguous about how interlaced modes are to be
836 * encoded. Our internal representation is of frame height, but some
837 * HDTV detailed timings are encoded as field height.
839 * The format list here is from CEA, in frame size. Technically we
840 * should be checking refresh rate too. Whatever.
843 drm_mode_do_interlace_quirk(struct drm_display_mode
*mode
,
844 struct detailed_pixel_timing
*pt
)
847 static const struct {
849 } cea_interlaced
[] = {
859 if (!(pt
->misc
& DRM_EDID_PT_INTERLACED
))
862 for (i
= 0; i
< ARRAY_SIZE(cea_interlaced
); i
++) {
863 if ((mode
->hdisplay
== cea_interlaced
[i
].w
) &&
864 (mode
->vdisplay
== cea_interlaced
[i
].h
/ 2)) {
866 mode
->vsync_start
*= 2;
867 mode
->vsync_end
*= 2;
873 mode
->flags
|= DRM_MODE_FLAG_INTERLACE
;
877 * drm_mode_detailed - create a new mode from an EDID detailed timing section
878 * @dev: DRM device (needed to create new mode)
880 * @timing: EDID detailed timing info
881 * @quirks: quirks to apply
883 * An EDID detailed timing block contains enough info for us to create and
884 * return a new struct drm_display_mode.
886 static struct drm_display_mode
*drm_mode_detailed(struct drm_device
*dev
,
888 struct detailed_timing
*timing
,
891 struct drm_display_mode
*mode
;
892 struct detailed_pixel_timing
*pt
= &timing
->data
.pixel_data
;
893 unsigned hactive
= (pt
->hactive_hblank_hi
& 0xf0) << 4 | pt
->hactive_lo
;
894 unsigned vactive
= (pt
->vactive_vblank_hi
& 0xf0) << 4 | pt
->vactive_lo
;
895 unsigned hblank
= (pt
->hactive_hblank_hi
& 0xf) << 8 | pt
->hblank_lo
;
896 unsigned vblank
= (pt
->vactive_vblank_hi
& 0xf) << 8 | pt
->vblank_lo
;
897 unsigned hsync_offset
= (pt
->hsync_vsync_offset_pulse_width_hi
& 0xc0) << 2 | pt
->hsync_offset_lo
;
898 unsigned hsync_pulse_width
= (pt
->hsync_vsync_offset_pulse_width_hi
& 0x30) << 4 | pt
->hsync_pulse_width_lo
;
899 unsigned vsync_offset
= (pt
->hsync_vsync_offset_pulse_width_hi
& 0xc) >> 2 | pt
->vsync_offset_pulse_width_lo
>> 4;
900 unsigned vsync_pulse_width
= (pt
->hsync_vsync_offset_pulse_width_hi
& 0x3) << 4 | (pt
->vsync_offset_pulse_width_lo
& 0xf);
902 /* ignore tiny modes */
903 if (hactive
< 64 || vactive
< 64)
906 if (pt
->misc
& DRM_EDID_PT_STEREO
) {
907 printk(KERN_WARNING
"stereo mode not supported\n");
910 if (!(pt
->misc
& DRM_EDID_PT_SEPARATE_SYNC
)) {
911 printk(KERN_WARNING
"composite sync not supported\n");
914 /* it is incorrect if hsync/vsync width is zero */
915 if (!hsync_pulse_width
|| !vsync_pulse_width
) {
916 DRM_DEBUG_KMS("Incorrect Detailed timing. "
917 "Wrong Hsync/Vsync pulse width\n");
921 if (quirks
& EDID_QUIRK_FORCE_REDUCED_BLANKING
) {
922 mode
= drm_cvt_mode(dev
, hactive
, vactive
, 60, true, false, false);
929 mode
= drm_mode_create(dev
);
933 if (quirks
& EDID_QUIRK_135_CLOCK_TOO_HIGH
)
934 timing
->pixel_clock
= cpu_to_le16(1088);
936 mode
->clock
= le16_to_cpu(timing
->pixel_clock
) * 10;
938 mode
->hdisplay
= hactive
;
939 mode
->hsync_start
= mode
->hdisplay
+ hsync_offset
;
940 mode
->hsync_end
= mode
->hsync_start
+ hsync_pulse_width
;
941 mode
->htotal
= mode
->hdisplay
+ hblank
;
943 mode
->vdisplay
= vactive
;
944 mode
->vsync_start
= mode
->vdisplay
+ vsync_offset
;
945 mode
->vsync_end
= mode
->vsync_start
+ vsync_pulse_width
;
946 mode
->vtotal
= mode
->vdisplay
+ vblank
;
948 /* Some EDIDs have bogus h/vtotal values */
949 if (mode
->hsync_end
> mode
->htotal
)
950 mode
->htotal
= mode
->hsync_end
+ 1;
951 if (mode
->vsync_end
> mode
->vtotal
)
952 mode
->vtotal
= mode
->vsync_end
+ 1;
954 drm_mode_do_interlace_quirk(mode
, pt
);
956 if (quirks
& EDID_QUIRK_DETAILED_SYNC_PP
) {
957 pt
->misc
|= DRM_EDID_PT_HSYNC_POSITIVE
| DRM_EDID_PT_VSYNC_POSITIVE
;
960 mode
->flags
|= (pt
->misc
& DRM_EDID_PT_HSYNC_POSITIVE
) ?
961 DRM_MODE_FLAG_PHSYNC
: DRM_MODE_FLAG_NHSYNC
;
962 mode
->flags
|= (pt
->misc
& DRM_EDID_PT_VSYNC_POSITIVE
) ?
963 DRM_MODE_FLAG_PVSYNC
: DRM_MODE_FLAG_NVSYNC
;
966 mode
->width_mm
= pt
->width_mm_lo
| (pt
->width_height_mm_hi
& 0xf0) << 4;
967 mode
->height_mm
= pt
->height_mm_lo
| (pt
->width_height_mm_hi
& 0xf) << 8;
969 if (quirks
& EDID_QUIRK_DETAILED_IN_CM
) {
970 mode
->width_mm
*= 10;
971 mode
->height_mm
*= 10;
974 if (quirks
& EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE
) {
975 mode
->width_mm
= edid
->width_cm
* 10;
976 mode
->height_mm
= edid
->height_cm
* 10;
979 mode
->type
= DRM_MODE_TYPE_DRIVER
;
980 drm_mode_set_name(mode
);
986 mode_in_hsync_range(const struct drm_display_mode
*mode
,
987 struct edid
*edid
, u8
*t
)
989 int hsync
, hmin
, hmax
;
992 if (edid
->revision
>= 4)
993 hmin
+= ((t
[4] & 0x04) ? 255 : 0);
995 if (edid
->revision
>= 4)
996 hmax
+= ((t
[4] & 0x08) ? 255 : 0);
997 hsync
= drm_mode_hsync(mode
);
999 return (hsync
<= hmax
&& hsync
>= hmin
);
1003 mode_in_vsync_range(const struct drm_display_mode
*mode
,
1004 struct edid
*edid
, u8
*t
)
1006 int vsync
, vmin
, vmax
;
1009 if (edid
->revision
>= 4)
1010 vmin
+= ((t
[4] & 0x01) ? 255 : 0);
1012 if (edid
->revision
>= 4)
1013 vmax
+= ((t
[4] & 0x02) ? 255 : 0);
1014 vsync
= drm_mode_vrefresh(mode
);
1016 return (vsync
<= vmax
&& vsync
>= vmin
);
1020 range_pixel_clock(struct edid
*edid
, u8
*t
)
1023 if (t
[9] == 0 || t
[9] == 255)
1026 /* 1.4 with CVT support gives us real precision, yay */
1027 if (edid
->revision
>= 4 && t
[10] == 0x04)
1028 return (t
[9] * 10000) - ((t
[12] >> 2) * 250);
1030 /* 1.3 is pathetic, so fuzz up a bit */
1031 return t
[9] * 10000 + 5001;
1035 mode_in_range(const struct drm_display_mode
*mode
, struct edid
*edid
,
1036 struct detailed_timing
*timing
)
1039 u8
*t
= (u8
*)timing
;
1041 if (!mode_in_hsync_range(mode
, edid
, t
))
1044 if (!mode_in_vsync_range(mode
, edid
, t
))
1047 if ((max_clock
= range_pixel_clock(edid
, t
)))
1048 if (mode
->clock
> max_clock
)
1051 /* 1.4 max horizontal check */
1052 if (edid
->revision
>= 4 && t
[10] == 0x04)
1053 if (t
[13] && mode
->hdisplay
> 8 * (t
[13] + (256 * (t
[12]&0x3))))
1056 if (mode_is_rb(mode
) && !drm_monitor_supports_rb(edid
))
1062 static bool valid_inferred_mode(const struct drm_connector
*connector
,
1063 const struct drm_display_mode
*mode
)
1065 struct drm_display_mode
*m
;
1068 list_for_each_entry(m
, &connector
->probed_modes
, head
) {
1069 if (mode
->hdisplay
== m
->hdisplay
&&
1070 mode
->vdisplay
== m
->vdisplay
&&
1071 drm_mode_vrefresh(mode
) == drm_mode_vrefresh(m
))
1072 return false; /* duplicated */
1073 if (mode
->hdisplay
<= m
->hdisplay
&&
1074 mode
->vdisplay
<= m
->vdisplay
)
1081 drm_dmt_modes_for_range(struct drm_connector
*connector
, struct edid
*edid
,
1082 struct detailed_timing
*timing
)
1085 struct drm_display_mode
*newmode
;
1086 struct drm_device
*dev
= connector
->dev
;
1088 for (i
= 0; i
< drm_num_dmt_modes
; i
++) {
1089 if (mode_in_range(drm_dmt_modes
+ i
, edid
, timing
) &&
1090 valid_inferred_mode(connector
, drm_dmt_modes
+ i
)) {
1091 newmode
= drm_mode_duplicate(dev
, &drm_dmt_modes
[i
]);
1093 drm_mode_probed_add(connector
, newmode
);
1102 /* fix up 1366x768 mode from 1368x768;
1103 * GFT/CVT can't express 1366 width which isn't dividable by 8
1105 static void fixup_mode_1366x768(struct drm_display_mode
*mode
)
1107 if (mode
->hdisplay
== 1368 && mode
->vdisplay
== 768) {
1108 mode
->hdisplay
= 1366;
1109 mode
->hsync_start
--;
1111 drm_mode_set_name(mode
);
1116 drm_gtf_modes_for_range(struct drm_connector
*connector
, struct edid
*edid
,
1117 struct detailed_timing
*timing
)
1120 struct drm_display_mode
*newmode
;
1121 struct drm_device
*dev
= connector
->dev
;
1123 for (i
= 0; i
< num_extra_modes
; i
++) {
1124 const struct minimode
*m
= &extra_modes
[i
];
1125 newmode
= drm_gtf_mode(dev
, m
->w
, m
->h
, m
->r
, 0, 0);
1129 fixup_mode_1366x768(newmode
);
1130 if (!mode_in_range(newmode
, edid
, timing
) ||
1131 !valid_inferred_mode(connector
, newmode
)) {
1132 drm_mode_destroy(dev
, newmode
);
1136 drm_mode_probed_add(connector
, newmode
);
1144 drm_cvt_modes_for_range(struct drm_connector
*connector
, struct edid
*edid
,
1145 struct detailed_timing
*timing
)
1148 struct drm_display_mode
*newmode
;
1149 struct drm_device
*dev
= connector
->dev
;
1150 bool rb
= drm_monitor_supports_rb(edid
);
1152 for (i
= 0; i
< num_extra_modes
; i
++) {
1153 const struct minimode
*m
= &extra_modes
[i
];
1154 newmode
= drm_cvt_mode(dev
, m
->w
, m
->h
, m
->r
, rb
, 0, 0);
1158 fixup_mode_1366x768(newmode
);
1159 if (!mode_in_range(newmode
, edid
, timing
) ||
1160 !valid_inferred_mode(connector
, newmode
)) {
1161 drm_mode_destroy(dev
, newmode
);
1165 drm_mode_probed_add(connector
, newmode
);
1173 do_inferred_modes(struct detailed_timing
*timing
, void *c
)
1175 struct detailed_mode_closure
*closure
= c
;
1176 struct detailed_non_pixel
*data
= &timing
->data
.other_data
;
1177 struct detailed_data_monitor_range
*range
= &data
->data
.range
;
1179 if (data
->type
!= EDID_DETAIL_MONITOR_RANGE
)
1182 closure
->modes
+= drm_dmt_modes_for_range(closure
->connector
,
1186 if (!version_greater(closure
->edid
, 1, 1))
1187 return; /* GTF not defined yet */
1189 switch (range
->flags
) {
1190 case 0x02: /* secondary gtf, XXX could do more */
1191 case 0x00: /* default gtf */
1192 closure
->modes
+= drm_gtf_modes_for_range(closure
->connector
,
1196 case 0x04: /* cvt, only in 1.4+ */
1197 if (!version_greater(closure
->edid
, 1, 3))
1200 closure
->modes
+= drm_cvt_modes_for_range(closure
->connector
,
1204 case 0x01: /* just the ranges, no formula */
1211 add_inferred_modes(struct drm_connector
*connector
, struct edid
*edid
)
1213 struct detailed_mode_closure closure
= {
1214 connector
, edid
, 0, 0, 0
1217 if (version_greater(edid
, 1, 0))
1218 drm_for_each_detailed_block((u8
*)edid
, do_inferred_modes
,
1221 return closure
.modes
;
1225 drm_est3_modes(struct drm_connector
*connector
, struct detailed_timing
*timing
)
1227 int i
, j
, m
, modes
= 0;
1228 struct drm_display_mode
*mode
;
1229 u8
*est
= ((u8
*)timing
) + 5;
1231 for (i
= 0; i
< 6; i
++) {
1232 for (j
= 7; j
> 0; j
--) {
1233 m
= (i
* 8) + (7 - j
);
1234 if (m
>= ARRAY_SIZE(est3_modes
))
1236 if (est
[i
] & (1 << j
)) {
1237 mode
= drm_mode_find_dmt(connector
->dev
,
1243 drm_mode_probed_add(connector
, mode
);
1254 do_established_modes(struct detailed_timing
*timing
, void *c
)
1256 struct detailed_mode_closure
*closure
= c
;
1257 struct detailed_non_pixel
*data
= &timing
->data
.other_data
;
1259 if (data
->type
== EDID_DETAIL_EST_TIMINGS
)
1260 closure
->modes
+= drm_est3_modes(closure
->connector
, timing
);
1264 * add_established_modes - get est. modes from EDID and add them
1265 * @edid: EDID block to scan
1267 * Each EDID block contains a bitmap of the supported "established modes" list
1268 * (defined above). Tease them out and add them to the global modes list.
1271 add_established_modes(struct drm_connector
*connector
, struct edid
*edid
)
1273 struct drm_device
*dev
= connector
->dev
;
1274 unsigned long est_bits
= edid
->established_timings
.t1
|
1275 (edid
->established_timings
.t2
<< 8) |
1276 ((edid
->established_timings
.mfg_rsvd
& 0x80) << 9);
1278 struct detailed_mode_closure closure
= {
1279 connector
, edid
, 0, 0, 0
1282 for (i
= 0; i
<= EDID_EST_TIMINGS
; i
++) {
1283 if (est_bits
& (1<<i
)) {
1284 struct drm_display_mode
*newmode
;
1285 newmode
= drm_mode_duplicate(dev
, &edid_est_modes
[i
]);
1287 drm_mode_probed_add(connector
, newmode
);
1293 if (version_greater(edid
, 1, 0))
1294 drm_for_each_detailed_block((u8
*)edid
,
1295 do_established_modes
, &closure
);
1297 return modes
+ closure
.modes
;
1301 do_standard_modes(struct detailed_timing
*timing
, void *c
)
1303 struct detailed_mode_closure
*closure
= c
;
1304 struct detailed_non_pixel
*data
= &timing
->data
.other_data
;
1305 struct drm_connector
*connector
= closure
->connector
;
1306 struct edid
*edid
= closure
->edid
;
1308 if (data
->type
== EDID_DETAIL_STD_MODES
) {
1310 for (i
= 0; i
< 6; i
++) {
1311 struct std_timing
*std
;
1312 struct drm_display_mode
*newmode
;
1314 std
= &data
->data
.timings
[i
];
1315 newmode
= drm_mode_std(connector
, edid
, std
,
1318 drm_mode_probed_add(connector
, newmode
);
1326 * add_standard_modes - get std. modes from EDID and add them
1327 * @edid: EDID block to scan
1329 * Standard modes can be calculated using the appropriate standard (DMT,
1330 * GTF or CVT. Grab them from @edid and add them to the list.
1333 add_standard_modes(struct drm_connector
*connector
, struct edid
*edid
)
1336 struct detailed_mode_closure closure
= {
1337 connector
, edid
, 0, 0, 0
1340 for (i
= 0; i
< EDID_STD_TIMINGS
; i
++) {
1341 struct drm_display_mode
*newmode
;
1343 newmode
= drm_mode_std(connector
, edid
,
1344 &edid
->standard_timings
[i
],
1347 drm_mode_probed_add(connector
, newmode
);
1352 if (version_greater(edid
, 1, 0))
1353 drm_for_each_detailed_block((u8
*)edid
, do_standard_modes
,
1356 /* XXX should also look for standard codes in VTB blocks */
1358 return modes
+ closure
.modes
;
1361 static int drm_cvt_modes(struct drm_connector
*connector
,
1362 struct detailed_timing
*timing
)
1364 int i
, j
, modes
= 0;
1365 struct drm_display_mode
*newmode
;
1366 struct drm_device
*dev
= connector
->dev
;
1367 struct cvt_timing
*cvt
;
1368 const int rates
[] = { 60, 85, 75, 60, 50 };
1369 const u8 empty
[3] = { 0, 0, 0 };
1371 for (i
= 0; i
< 4; i
++) {
1372 int uninitialized_var(width
), height
;
1373 cvt
= &(timing
->data
.other_data
.data
.cvt
[i
]);
1375 if (!memcmp(cvt
->code
, empty
, 3))
1378 height
= (cvt
->code
[0] + ((cvt
->code
[1] & 0xf0) << 4) + 1) * 2;
1379 switch (cvt
->code
[1] & 0x0c) {
1381 width
= height
* 4 / 3;
1384 width
= height
* 16 / 9;
1387 width
= height
* 16 / 10;
1390 width
= height
* 15 / 9;
1394 for (j
= 1; j
< 5; j
++) {
1395 if (cvt
->code
[2] & (1 << j
)) {
1396 newmode
= drm_cvt_mode(dev
, width
, height
,
1400 drm_mode_probed_add(connector
, newmode
);
1411 do_cvt_mode(struct detailed_timing
*timing
, void *c
)
1413 struct detailed_mode_closure
*closure
= c
;
1414 struct detailed_non_pixel
*data
= &timing
->data
.other_data
;
1416 if (data
->type
== EDID_DETAIL_CVT_3BYTE
)
1417 closure
->modes
+= drm_cvt_modes(closure
->connector
, timing
);
1421 add_cvt_modes(struct drm_connector
*connector
, struct edid
*edid
)
1423 struct detailed_mode_closure closure
= {
1424 connector
, edid
, 0, 0, 0
1427 if (version_greater(edid
, 1, 2))
1428 drm_for_each_detailed_block((u8
*)edid
, do_cvt_mode
, &closure
);
1430 /* XXX should also look for CVT codes in VTB blocks */
1432 return closure
.modes
;
1436 do_detailed_mode(struct detailed_timing
*timing
, void *c
)
1438 struct detailed_mode_closure
*closure
= c
;
1439 struct drm_display_mode
*newmode
;
1441 if (timing
->pixel_clock
) {
1442 newmode
= drm_mode_detailed(closure
->connector
->dev
,
1443 closure
->edid
, timing
,
1448 if (closure
->preferred
)
1449 newmode
->type
|= DRM_MODE_TYPE_PREFERRED
;
1451 drm_mode_probed_add(closure
->connector
, newmode
);
1453 closure
->preferred
= 0;
1458 * add_detailed_modes - Add modes from detailed timings
1459 * @connector: attached connector
1460 * @edid: EDID block to scan
1461 * @quirks: quirks to apply
1464 add_detailed_modes(struct drm_connector
*connector
, struct edid
*edid
,
1467 struct detailed_mode_closure closure
= {
1475 if (closure
.preferred
&& !version_greater(edid
, 1, 3))
1477 (edid
->features
& DRM_EDID_FEATURE_PREFERRED_TIMING
);
1479 drm_for_each_detailed_block((u8
*)edid
, do_detailed_mode
, &closure
);
1481 return closure
.modes
;
1484 #define HDMI_IDENTIFIER 0x000C03
1485 #define AUDIO_BLOCK 0x01
1486 #define VIDEO_BLOCK 0x02
1487 #define VENDOR_BLOCK 0x03
1488 #define SPEAKER_BLOCK 0x04
1489 #define EDID_BASIC_AUDIO (1 << 6)
1490 #define EDID_CEA_YCRCB444 (1 << 5)
1491 #define EDID_CEA_YCRCB422 (1 << 4)
1494 * Search EDID for CEA extension block.
1496 u8
*drm_find_cea_extension(struct edid
*edid
)
1498 u8
*edid_ext
= NULL
;
1501 /* No EDID or EDID extensions */
1502 if (edid
== NULL
|| edid
->extensions
== 0)
1505 /* Find CEA extension */
1506 for (i
= 0; i
< edid
->extensions
; i
++) {
1507 edid_ext
= (u8
*)edid
+ EDID_LENGTH
* (i
+ 1);
1508 if (edid_ext
[0] == CEA_EXT
)
1512 if (i
== edid
->extensions
)
1517 EXPORT_SYMBOL(drm_find_cea_extension
);
1520 do_cea_modes (struct drm_connector
*connector
, u8
*db
, u8 len
)
1522 struct drm_device
*dev
= connector
->dev
;
1523 u8
* mode
, cea_mode
;
1526 for (mode
= db
; mode
< db
+ len
; mode
++) {
1527 cea_mode
= (*mode
& 127) - 1; /* CEA modes are numbered 1..127 */
1528 if (cea_mode
< drm_num_cea_modes
) {
1529 struct drm_display_mode
*newmode
;
1530 newmode
= drm_mode_duplicate(dev
,
1531 &edid_cea_modes
[cea_mode
]);
1533 drm_mode_probed_add(connector
, newmode
);
1543 cea_db_payload_len(const u8
*db
)
1545 return db
[0] & 0x1f;
1549 cea_db_tag(const u8
*db
)
1555 cea_revision(const u8
*cea
)
1561 cea_db_offsets(const u8
*cea
, int *start
, int *end
)
1563 /* Data block offset in CEA extension block */
1568 if (*end
< 4 || *end
> 127)
1573 #define for_each_cea_db(cea, i, start, end) \
1574 for ((i) = (start); (i) < (end) && (i) + cea_db_payload_len(&(cea)[(i)]) < (end); (i) += cea_db_payload_len(&(cea)[(i)]) + 1)
1577 add_cea_modes(struct drm_connector
*connector
, struct edid
*edid
)
1579 u8
* cea
= drm_find_cea_extension(edid
);
1583 if (cea
&& cea_revision(cea
) >= 3) {
1586 if (cea_db_offsets(cea
, &start
, &end
))
1589 for_each_cea_db(cea
, i
, start
, end
) {
1591 dbl
= cea_db_payload_len(db
);
1593 if (cea_db_tag(db
) == VIDEO_BLOCK
)
1594 modes
+= do_cea_modes (connector
, db
+1, dbl
);
1602 parse_hdmi_vsdb(struct drm_connector
*connector
, const u8
*db
)
1604 u8 len
= cea_db_payload_len(db
);
1607 connector
->eld
[5] |= (db
[6] >> 7) << 1; /* Supports_AI */
1608 connector
->dvi_dual
= db
[6] & 1;
1611 connector
->max_tmds_clock
= db
[7] * 5;
1613 connector
->latency_present
[0] = db
[8] >> 7;
1614 connector
->latency_present
[1] = (db
[8] >> 6) & 1;
1617 connector
->video_latency
[0] = db
[9];
1619 connector
->audio_latency
[0] = db
[10];
1621 connector
->video_latency
[1] = db
[11];
1623 connector
->audio_latency
[1] = db
[12];
1625 DRM_LOG_KMS("HDMI: DVI dual %d, "
1626 "max TMDS clock %d, "
1627 "latency present %d %d, "
1628 "video latency %d %d, "
1629 "audio latency %d %d\n",
1630 connector
->dvi_dual
,
1631 connector
->max_tmds_clock
,
1632 (int) connector
->latency_present
[0],
1633 (int) connector
->latency_present
[1],
1634 connector
->video_latency
[0],
1635 connector
->video_latency
[1],
1636 connector
->audio_latency
[0],
1637 connector
->audio_latency
[1]);
1641 monitor_name(struct detailed_timing
*t
, void *data
)
1643 if (t
->data
.other_data
.type
== EDID_DETAIL_MONITOR_NAME
)
1644 *(u8
**)data
= t
->data
.other_data
.data
.str
.str
;
1647 static bool cea_db_is_hdmi_vsdb(const u8
*db
)
1651 if (cea_db_tag(db
) != VENDOR_BLOCK
)
1654 if (cea_db_payload_len(db
) < 5)
1657 hdmi_id
= db
[1] | (db
[2] << 8) | (db
[3] << 16);
1659 return hdmi_id
== HDMI_IDENTIFIER
;
1663 * drm_edid_to_eld - build ELD from EDID
1664 * @connector: connector corresponding to the HDMI/DP sink
1665 * @edid: EDID to parse
1667 * Fill the ELD (EDID-Like Data) buffer for passing to the audio driver.
1668 * Some ELD fields are left to the graphics driver caller:
1673 void drm_edid_to_eld(struct drm_connector
*connector
, struct edid
*edid
)
1675 uint8_t *eld
= connector
->eld
;
1683 memset(eld
, 0, sizeof(connector
->eld
));
1685 cea
= drm_find_cea_extension(edid
);
1687 DRM_DEBUG_KMS("ELD: no CEA Extension found\n");
1692 drm_for_each_detailed_block((u8
*)edid
, monitor_name
, &name
);
1693 for (mnl
= 0; name
&& mnl
< 13; mnl
++) {
1694 if (name
[mnl
] == 0x0a)
1696 eld
[20 + mnl
] = name
[mnl
];
1698 eld
[4] = (cea
[1] << 5) | mnl
;
1699 DRM_DEBUG_KMS("ELD monitor %s\n", eld
+ 20);
1701 eld
[0] = 2 << 3; /* ELD version: 2 */
1703 eld
[16] = edid
->mfg_id
[0];
1704 eld
[17] = edid
->mfg_id
[1];
1705 eld
[18] = edid
->prod_code
[0];
1706 eld
[19] = edid
->prod_code
[1];
1708 if (cea_revision(cea
) >= 3) {
1711 if (cea_db_offsets(cea
, &start
, &end
)) {
1716 for_each_cea_db(cea
, i
, start
, end
) {
1718 dbl
= cea_db_payload_len(db
);
1720 switch (cea_db_tag(db
)) {
1722 /* Audio Data Block, contains SADs */
1723 sad_count
= dbl
/ 3;
1725 memcpy(eld
+ 20 + mnl
, &db
[1], dbl
);
1728 /* Speaker Allocation Data Block */
1733 /* HDMI Vendor-Specific Data Block */
1734 if (cea_db_is_hdmi_vsdb(db
))
1735 parse_hdmi_vsdb(connector
, db
);
1742 eld
[5] |= sad_count
<< 4;
1743 eld
[2] = (20 + mnl
+ sad_count
* 3 + 3) / 4;
1745 DRM_DEBUG_KMS("ELD size %d, SAD count %d\n", (int)eld
[2], sad_count
);
1747 EXPORT_SYMBOL(drm_edid_to_eld
);
1750 * drm_av_sync_delay - HDMI/DP sink audio-video sync delay in millisecond
1751 * @connector: connector associated with the HDMI/DP sink
1752 * @mode: the display mode
1754 int drm_av_sync_delay(struct drm_connector
*connector
,
1755 struct drm_display_mode
*mode
)
1757 int i
= !!(mode
->flags
& DRM_MODE_FLAG_INTERLACE
);
1760 if (!connector
->latency_present
[0])
1762 if (!connector
->latency_present
[1])
1765 a
= connector
->audio_latency
[i
];
1766 v
= connector
->video_latency
[i
];
1769 * HDMI/DP sink doesn't support audio or video?
1771 if (a
== 255 || v
== 255)
1775 * Convert raw EDID values to millisecond.
1776 * Treat unknown latency as 0ms.
1779 a
= min(2 * (a
- 1), 500);
1781 v
= min(2 * (v
- 1), 500);
1783 return max(v
- a
, 0);
1785 EXPORT_SYMBOL(drm_av_sync_delay
);
1788 * drm_select_eld - select one ELD from multiple HDMI/DP sinks
1789 * @encoder: the encoder just changed display mode
1790 * @mode: the adjusted display mode
1792 * It's possible for one encoder to be associated with multiple HDMI/DP sinks.
1793 * The policy is now hard coded to simply use the first HDMI/DP sink's ELD.
1795 struct drm_connector
*drm_select_eld(struct drm_encoder
*encoder
,
1796 struct drm_display_mode
*mode
)
1798 struct drm_connector
*connector
;
1799 struct drm_device
*dev
= encoder
->dev
;
1801 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
)
1802 if (connector
->encoder
== encoder
&& connector
->eld
[0])
1807 EXPORT_SYMBOL(drm_select_eld
);
1810 * drm_detect_hdmi_monitor - detect whether monitor is hdmi.
1811 * @edid: monitor EDID information
1813 * Parse the CEA extension according to CEA-861-B.
1814 * Return true if HDMI, false if not or unknown.
1816 bool drm_detect_hdmi_monitor(struct edid
*edid
)
1820 int start_offset
, end_offset
;
1822 edid_ext
= drm_find_cea_extension(edid
);
1826 if (cea_db_offsets(edid_ext
, &start_offset
, &end_offset
))
1830 * Because HDMI identifier is in Vendor Specific Block,
1831 * search it from all data blocks of CEA extension.
1833 for_each_cea_db(edid_ext
, i
, start_offset
, end_offset
) {
1834 if (cea_db_is_hdmi_vsdb(&edid_ext
[i
]))
1840 EXPORT_SYMBOL(drm_detect_hdmi_monitor
);
1843 * drm_detect_monitor_audio - check monitor audio capability
1845 * Monitor should have CEA extension block.
1846 * If monitor has 'basic audio', but no CEA audio blocks, it's 'basic
1847 * audio' only. If there is any audio extension block and supported
1848 * audio format, assume at least 'basic audio' support, even if 'basic
1849 * audio' is not defined in EDID.
1852 bool drm_detect_monitor_audio(struct edid
*edid
)
1856 bool has_audio
= false;
1857 int start_offset
, end_offset
;
1859 edid_ext
= drm_find_cea_extension(edid
);
1863 has_audio
= ((edid_ext
[3] & EDID_BASIC_AUDIO
) != 0);
1866 DRM_DEBUG_KMS("Monitor has basic audio support\n");
1870 if (cea_db_offsets(edid_ext
, &start_offset
, &end_offset
))
1873 for_each_cea_db(edid_ext
, i
, start_offset
, end_offset
) {
1874 if (cea_db_tag(&edid_ext
[i
]) == AUDIO_BLOCK
) {
1876 for (j
= 1; j
< cea_db_payload_len(&edid_ext
[i
]) + 1; j
+= 3)
1877 DRM_DEBUG_KMS("CEA audio format %d\n",
1878 (edid_ext
[i
+ j
] >> 3) & 0xf);
1885 EXPORT_SYMBOL(drm_detect_monitor_audio
);
1888 * drm_add_display_info - pull display info out if present
1890 * @info: display info (attached to connector)
1892 * Grab any available display info and stuff it into the drm_display_info
1893 * structure that's part of the connector. Useful for tracking bpp and
1896 static void drm_add_display_info(struct edid
*edid
,
1897 struct drm_display_info
*info
)
1901 info
->width_mm
= edid
->width_cm
* 10;
1902 info
->height_mm
= edid
->height_cm
* 10;
1904 /* driver figures it out in this case */
1906 info
->color_formats
= 0;
1908 if (edid
->revision
< 3)
1911 if (!(edid
->input
& DRM_EDID_INPUT_DIGITAL
))
1914 /* Get data from CEA blocks if present */
1915 edid_ext
= drm_find_cea_extension(edid
);
1917 info
->cea_rev
= edid_ext
[1];
1919 /* The existence of a CEA block should imply RGB support */
1920 info
->color_formats
= DRM_COLOR_FORMAT_RGB444
;
1921 if (edid_ext
[3] & EDID_CEA_YCRCB444
)
1922 info
->color_formats
|= DRM_COLOR_FORMAT_YCRCB444
;
1923 if (edid_ext
[3] & EDID_CEA_YCRCB422
)
1924 info
->color_formats
|= DRM_COLOR_FORMAT_YCRCB422
;
1927 /* Only defined for 1.4 with digital displays */
1928 if (edid
->revision
< 4)
1931 switch (edid
->input
& DRM_EDID_DIGITAL_DEPTH_MASK
) {
1932 case DRM_EDID_DIGITAL_DEPTH_6
:
1935 case DRM_EDID_DIGITAL_DEPTH_8
:
1938 case DRM_EDID_DIGITAL_DEPTH_10
:
1941 case DRM_EDID_DIGITAL_DEPTH_12
:
1944 case DRM_EDID_DIGITAL_DEPTH_14
:
1947 case DRM_EDID_DIGITAL_DEPTH_16
:
1950 case DRM_EDID_DIGITAL_DEPTH_UNDEF
:
1956 info
->color_formats
|= DRM_COLOR_FORMAT_RGB444
;
1957 if (edid
->features
& DRM_EDID_FEATURE_RGB_YCRCB444
)
1958 info
->color_formats
|= DRM_COLOR_FORMAT_YCRCB444
;
1959 if (edid
->features
& DRM_EDID_FEATURE_RGB_YCRCB422
)
1960 info
->color_formats
|= DRM_COLOR_FORMAT_YCRCB422
;
1964 * drm_add_edid_modes - add modes from EDID data, if available
1965 * @connector: connector we're probing
1968 * Add the specified modes to the connector's mode list.
1970 * Return number of modes added or 0 if we couldn't find any.
1972 int drm_add_edid_modes(struct drm_connector
*connector
, struct edid
*edid
)
1980 if (!drm_edid_is_valid(edid
)) {
1981 dev_warn(connector
->dev
->dev
, "%s: EDID invalid.\n",
1982 drm_get_connector_name(connector
));
1986 quirks
= edid_get_quirks(edid
);
1989 * EDID spec says modes should be preferred in this order:
1990 * - preferred detailed mode
1991 * - other detailed modes from base block
1992 * - detailed modes from extension blocks
1993 * - CVT 3-byte code modes
1994 * - standard timing codes
1995 * - established timing codes
1996 * - modes inferred from GTF or CVT range information
1998 * We get this pretty much right.
2000 * XXX order for additional mode types in extension blocks?
2002 num_modes
+= add_detailed_modes(connector
, edid
, quirks
);
2003 num_modes
+= add_cvt_modes(connector
, edid
);
2004 num_modes
+= add_standard_modes(connector
, edid
);
2005 num_modes
+= add_established_modes(connector
, edid
);
2006 num_modes
+= add_inferred_modes(connector
, edid
);
2007 num_modes
+= add_cea_modes(connector
, edid
);
2009 if (quirks
& (EDID_QUIRK_PREFER_LARGE_60
| EDID_QUIRK_PREFER_LARGE_75
))
2010 edid_fixup_preferred(connector
, quirks
);
2012 drm_add_display_info(edid
, &connector
->display_info
);
2016 EXPORT_SYMBOL(drm_add_edid_modes
);
2019 * drm_add_modes_noedid - add modes for the connectors without EDID
2020 * @connector: connector we're probing
2021 * @hdisplay: the horizontal display limit
2022 * @vdisplay: the vertical display limit
2024 * Add the specified modes to the connector's mode list. Only when the
2025 * hdisplay/vdisplay is not beyond the given limit, it will be added.
2027 * Return number of modes added or 0 if we couldn't find any.
2029 int drm_add_modes_noedid(struct drm_connector
*connector
,
2030 int hdisplay
, int vdisplay
)
2032 int i
, count
, num_modes
= 0;
2033 struct drm_display_mode
*mode
;
2034 struct drm_device
*dev
= connector
->dev
;
2036 count
= sizeof(drm_dmt_modes
) / sizeof(struct drm_display_mode
);
2042 for (i
= 0; i
< count
; i
++) {
2043 const struct drm_display_mode
*ptr
= &drm_dmt_modes
[i
];
2044 if (hdisplay
&& vdisplay
) {
2046 * Only when two are valid, they will be used to check
2047 * whether the mode should be added to the mode list of
2050 if (ptr
->hdisplay
> hdisplay
||
2051 ptr
->vdisplay
> vdisplay
)
2054 if (drm_mode_vrefresh(ptr
) > 61)
2056 mode
= drm_mode_duplicate(dev
, ptr
);
2058 drm_mode_probed_add(connector
, mode
);
2064 EXPORT_SYMBOL(drm_add_modes_noedid
);