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/export.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)
70 struct detailed_mode_closure
{
71 struct drm_connector
*connector
;
83 static struct edid_quirk
{
87 } edid_quirk_list
[] = {
89 { "ACR", 44358, EDID_QUIRK_PREFER_LARGE_60
},
91 { "API", 0x7602, EDID_QUIRK_PREFER_LARGE_60
},
93 { "ACR", 2423, EDID_QUIRK_FIRST_DETAILED_PREFERRED
},
95 /* Belinea 10 15 55 */
96 { "MAX", 1516, EDID_QUIRK_PREFER_LARGE_60
},
97 { "MAX", 0x77e, EDID_QUIRK_PREFER_LARGE_60
},
99 /* Envision Peripherals, Inc. EN-7100e */
100 { "EPI", 59264, EDID_QUIRK_135_CLOCK_TOO_HIGH
},
101 /* Envision EN2028 */
102 { "EPI", 8232, EDID_QUIRK_PREFER_LARGE_60
},
104 /* Funai Electronics PM36B */
105 { "FCM", 13600, EDID_QUIRK_PREFER_LARGE_75
|
106 EDID_QUIRK_DETAILED_IN_CM
},
108 /* LG Philips LCD LP154W01-A5 */
109 { "LPL", 0, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE
},
110 { "LPL", 0x2a00, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE
},
112 /* Philips 107p5 CRT */
113 { "PHL", 57364, EDID_QUIRK_FIRST_DETAILED_PREFERRED
},
116 { "PTS", 765, EDID_QUIRK_FIRST_DETAILED_PREFERRED
},
118 /* Samsung SyncMaster 205BW. Note: irony */
119 { "SAM", 541, EDID_QUIRK_DETAILED_SYNC_PP
},
120 /* Samsung SyncMaster 22[5-6]BW */
121 { "SAM", 596, EDID_QUIRK_PREFER_LARGE_60
},
122 { "SAM", 638, EDID_QUIRK_PREFER_LARGE_60
},
125 /*** DDC fetch and block validation ***/
127 static const u8 edid_header
[] = {
128 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00
132 * Sanity check the header of the base EDID block. Return 8 if the header
133 * is perfect, down to 0 if it's totally wrong.
135 int drm_edid_header_is_valid(const u8
*raw_edid
)
139 for (i
= 0; i
< sizeof(edid_header
); i
++)
140 if (raw_edid
[i
] == edid_header
[i
])
145 EXPORT_SYMBOL(drm_edid_header_is_valid
);
149 * Sanity check the EDID block (base or extension). Return 0 if the block
150 * doesn't check out, or 1 if it's valid.
153 drm_edid_block_valid(u8
*raw_edid
)
157 struct edid
*edid
= (struct edid
*)raw_edid
;
159 if (raw_edid
[0] == 0x00) {
160 int score
= drm_edid_header_is_valid(raw_edid
);
162 else if (score
>= 6) {
163 DRM_DEBUG("Fixing EDID header, your hardware may be failing\n");
164 memcpy(raw_edid
, edid_header
, sizeof(edid_header
));
170 for (i
= 0; i
< EDID_LENGTH
; i
++)
173 DRM_ERROR("EDID checksum is invalid, remainder is %d\n", csum
);
175 /* allow CEA to slide through, switches mangle this */
176 if (raw_edid
[0] != 0x02)
180 /* per-block-type checks */
181 switch (raw_edid
[0]) {
183 if (edid
->version
!= 1) {
184 DRM_ERROR("EDID has major version %d, instead of 1\n", edid
->version
);
188 if (edid
->revision
> 4)
189 DRM_DEBUG("EDID minor > 4, assuming backward compatibility\n");
200 printk(KERN_ERR
"Raw EDID:\n");
201 print_hex_dump(KERN_ERR
, " \t", DUMP_PREFIX_NONE
, 16, 1,
202 raw_edid
, EDID_LENGTH
, false);
208 * drm_edid_is_valid - sanity check EDID data
211 * Sanity-check an entire EDID record (including extensions)
213 bool drm_edid_is_valid(struct edid
*edid
)
216 u8
*raw
= (u8
*)edid
;
221 for (i
= 0; i
<= edid
->extensions
; i
++)
222 if (!drm_edid_block_valid(raw
+ i
* EDID_LENGTH
))
227 EXPORT_SYMBOL(drm_edid_is_valid
);
229 #define DDC_ADDR 0x50
230 #define DDC_SEGMENT_ADDR 0x30
232 * Get EDID information via I2C.
234 * \param adapter : i2c device adaptor
235 * \param buf : EDID data buffer to be filled
236 * \param len : EDID data buffer length
237 * \return 0 on success or -1 on failure.
239 * Try to fetch EDID information by calling i2c driver function.
242 drm_do_probe_ddc_edid(struct i2c_adapter
*adapter
, unsigned char *buf
,
245 unsigned char start
= block
* EDID_LENGTH
;
246 int ret
, retries
= 5;
248 /* The core i2c driver will automatically retry the transfer if the
249 * adapter reports EAGAIN. However, we find that bit-banging transfers
250 * are susceptible to errors under a heavily loaded machine and
251 * generate spurious NAKs and timeouts. Retrying the transfer
252 * of the individual block a few times seems to overcome this.
255 struct i2c_msg msgs
[] = {
268 ret
= i2c_transfer(adapter
, msgs
, 2);
269 } while (ret
!= 2 && --retries
);
271 return ret
== 2 ? 0 : -1;
274 static bool drm_edid_is_zero(u8
*in_edid
, int length
)
277 u32
*raw_edid
= (u32
*)in_edid
;
279 for (i
= 0; i
< length
/ 4; i
++)
280 if (*(raw_edid
+ i
) != 0)
286 drm_do_get_edid(struct drm_connector
*connector
, struct i2c_adapter
*adapter
)
288 int i
, j
= 0, valid_extensions
= 0;
291 if ((block
= kmalloc(EDID_LENGTH
, GFP_KERNEL
)) == NULL
)
294 /* base block fetch */
295 for (i
= 0; i
< 4; i
++) {
296 if (drm_do_probe_ddc_edid(adapter
, block
, 0, EDID_LENGTH
))
298 if (drm_edid_block_valid(block
))
300 if (i
== 0 && drm_edid_is_zero(block
, EDID_LENGTH
)) {
301 connector
->null_edid_counter
++;
308 /* if there's no extensions, we're done */
309 if (block
[0x7e] == 0)
312 new = krealloc(block
, (block
[0x7e] + 1) * EDID_LENGTH
, GFP_KERNEL
);
317 for (j
= 1; j
<= block
[0x7e]; j
++) {
318 for (i
= 0; i
< 4; i
++) {
319 if (drm_do_probe_ddc_edid(adapter
,
320 block
+ (valid_extensions
+ 1) * EDID_LENGTH
,
323 if (drm_edid_block_valid(block
+ (valid_extensions
+ 1) * EDID_LENGTH
)) {
329 dev_warn(connector
->dev
->dev
,
330 "%s: Ignoring invalid EDID block %d.\n",
331 drm_get_connector_name(connector
), j
);
334 if (valid_extensions
!= block
[0x7e]) {
335 block
[EDID_LENGTH
-1] += block
[0x7e] - valid_extensions
;
336 block
[0x7e] = valid_extensions
;
337 new = krealloc(block
, (valid_extensions
+ 1) * EDID_LENGTH
, GFP_KERNEL
);
346 dev_warn(connector
->dev
->dev
, "%s: EDID block %d invalid.\n",
347 drm_get_connector_name(connector
), j
);
355 * Probe DDC presence.
357 * \param adapter : i2c device adaptor
358 * \return 1 on success
361 drm_probe_ddc(struct i2c_adapter
*adapter
)
365 return (drm_do_probe_ddc_edid(adapter
, &out
, 0, 1) == 0);
369 * drm_get_edid - get EDID data, if available
370 * @connector: connector we're probing
371 * @adapter: i2c adapter to use for DDC
373 * Poke the given i2c channel to grab EDID data if possible. If found,
374 * attach it to the connector.
376 * Return edid data or NULL if we couldn't find any.
378 struct edid
*drm_get_edid(struct drm_connector
*connector
,
379 struct i2c_adapter
*adapter
)
381 struct edid
*edid
= NULL
;
383 if (drm_probe_ddc(adapter
))
384 edid
= (struct edid
*)drm_do_get_edid(connector
, adapter
);
386 connector
->display_info
.raw_edid
= (char *)edid
;
391 EXPORT_SYMBOL(drm_get_edid
);
393 /*** EDID parsing ***/
396 * edid_vendor - match a string against EDID's obfuscated vendor field
397 * @edid: EDID to match
398 * @vendor: vendor string
400 * Returns true if @vendor is in @edid, false otherwise
402 static bool edid_vendor(struct edid
*edid
, char *vendor
)
406 edid_vendor
[0] = ((edid
->mfg_id
[0] & 0x7c) >> 2) + '@';
407 edid_vendor
[1] = (((edid
->mfg_id
[0] & 0x3) << 3) |
408 ((edid
->mfg_id
[1] & 0xe0) >> 5)) + '@';
409 edid_vendor
[2] = (edid
->mfg_id
[1] & 0x1f) + '@';
411 return !strncmp(edid_vendor
, vendor
, 3);
415 * edid_get_quirks - return quirk flags for a given EDID
416 * @edid: EDID to process
418 * This tells subsequent routines what fixes they need to apply.
420 static u32
edid_get_quirks(struct edid
*edid
)
422 struct edid_quirk
*quirk
;
425 for (i
= 0; i
< ARRAY_SIZE(edid_quirk_list
); i
++) {
426 quirk
= &edid_quirk_list
[i
];
428 if (edid_vendor(edid
, quirk
->vendor
) &&
429 (EDID_PRODUCT_ID(edid
) == quirk
->product_id
))
430 return quirk
->quirks
;
436 #define MODE_SIZE(m) ((m)->hdisplay * (m)->vdisplay)
437 #define MODE_REFRESH_DIFF(m,r) (abs((m)->vrefresh - target_refresh))
440 * edid_fixup_preferred - set preferred modes based on quirk list
441 * @connector: has mode list to fix up
442 * @quirks: quirks list
444 * Walk the mode list for @connector, clearing the preferred status
445 * on existing modes and setting it anew for the right mode ala @quirks.
447 static void edid_fixup_preferred(struct drm_connector
*connector
,
450 struct drm_display_mode
*t
, *cur_mode
, *preferred_mode
;
451 int target_refresh
= 0;
453 if (list_empty(&connector
->probed_modes
))
456 if (quirks
& EDID_QUIRK_PREFER_LARGE_60
)
458 if (quirks
& EDID_QUIRK_PREFER_LARGE_75
)
461 preferred_mode
= list_first_entry(&connector
->probed_modes
,
462 struct drm_display_mode
, head
);
464 list_for_each_entry_safe(cur_mode
, t
, &connector
->probed_modes
, head
) {
465 cur_mode
->type
&= ~DRM_MODE_TYPE_PREFERRED
;
467 if (cur_mode
== preferred_mode
)
470 /* Largest mode is preferred */
471 if (MODE_SIZE(cur_mode
) > MODE_SIZE(preferred_mode
))
472 preferred_mode
= cur_mode
;
474 /* At a given size, try to get closest to target refresh */
475 if ((MODE_SIZE(cur_mode
) == MODE_SIZE(preferred_mode
)) &&
476 MODE_REFRESH_DIFF(cur_mode
, target_refresh
) <
477 MODE_REFRESH_DIFF(preferred_mode
, target_refresh
)) {
478 preferred_mode
= cur_mode
;
482 preferred_mode
->type
|= DRM_MODE_TYPE_PREFERRED
;
485 struct drm_display_mode
*drm_mode_find_dmt(struct drm_device
*dev
,
486 int hsize
, int vsize
, int fresh
)
488 struct drm_display_mode
*mode
= NULL
;
491 for (i
= 0; i
< drm_num_dmt_modes
; i
++) {
492 const struct drm_display_mode
*ptr
= &drm_dmt_modes
[i
];
493 if (hsize
== ptr
->hdisplay
&&
494 vsize
== ptr
->vdisplay
&&
495 fresh
== drm_mode_vrefresh(ptr
)) {
496 /* get the expected default mode */
497 mode
= drm_mode_duplicate(dev
, ptr
);
503 EXPORT_SYMBOL(drm_mode_find_dmt
);
505 typedef void detailed_cb(struct detailed_timing
*timing
, void *closure
);
508 cea_for_each_detailed_block(u8
*ext
, detailed_cb
*cb
, void *closure
)
511 u8 rev
= ext
[0x01], d
= ext
[0x02];
512 u8
*det_base
= ext
+ d
;
519 /* have to infer how many blocks we have, check pixel clock */
520 for (i
= 0; i
< 6; i
++)
521 if (det_base
[18*i
] || det_base
[18*i
+1])
526 n
= min(ext
[0x03] & 0x0f, 6);
530 for (i
= 0; i
< n
; i
++)
531 cb((struct detailed_timing
*)(det_base
+ 18 * i
), closure
);
535 vtb_for_each_detailed_block(u8
*ext
, detailed_cb
*cb
, void *closure
)
537 unsigned int i
, n
= min((int)ext
[0x02], 6);
538 u8
*det_base
= ext
+ 5;
541 return; /* unknown version */
543 for (i
= 0; i
< n
; i
++)
544 cb((struct detailed_timing
*)(det_base
+ 18 * i
), closure
);
548 drm_for_each_detailed_block(u8
*raw_edid
, detailed_cb
*cb
, void *closure
)
551 struct edid
*edid
= (struct edid
*)raw_edid
;
556 for (i
= 0; i
< EDID_DETAILED_TIMINGS
; i
++)
557 cb(&(edid
->detailed_timings
[i
]), closure
);
559 for (i
= 1; i
<= raw_edid
[0x7e]; i
++) {
560 u8
*ext
= raw_edid
+ (i
* EDID_LENGTH
);
563 cea_for_each_detailed_block(ext
, cb
, closure
);
566 vtb_for_each_detailed_block(ext
, cb
, closure
);
575 is_rb(struct detailed_timing
*t
, void *data
)
578 if (r
[3] == EDID_DETAIL_MONITOR_RANGE
)
580 *(bool *)data
= true;
583 /* EDID 1.4 defines this explicitly. For EDID 1.3, we guess, badly. */
585 drm_monitor_supports_rb(struct edid
*edid
)
587 if (edid
->revision
>= 4) {
589 drm_for_each_detailed_block((u8
*)edid
, is_rb
, &ret
);
593 return ((edid
->input
& DRM_EDID_INPUT_DIGITAL
) != 0);
597 find_gtf2(struct detailed_timing
*t
, void *data
)
600 if (r
[3] == EDID_DETAIL_MONITOR_RANGE
&& r
[10] == 0x02)
604 /* Secondary GTF curve kicks in above some break frequency */
606 drm_gtf2_hbreak(struct edid
*edid
)
609 drm_for_each_detailed_block((u8
*)edid
, find_gtf2
, &r
);
610 return r
? (r
[12] * 2) : 0;
614 drm_gtf2_2c(struct edid
*edid
)
617 drm_for_each_detailed_block((u8
*)edid
, find_gtf2
, &r
);
618 return r
? r
[13] : 0;
622 drm_gtf2_m(struct edid
*edid
)
625 drm_for_each_detailed_block((u8
*)edid
, find_gtf2
, &r
);
626 return r
? (r
[15] << 8) + r
[14] : 0;
630 drm_gtf2_k(struct edid
*edid
)
633 drm_for_each_detailed_block((u8
*)edid
, find_gtf2
, &r
);
634 return r
? r
[16] : 0;
638 drm_gtf2_2j(struct edid
*edid
)
641 drm_for_each_detailed_block((u8
*)edid
, find_gtf2
, &r
);
642 return r
? r
[17] : 0;
646 * standard_timing_level - get std. timing level(CVT/GTF/DMT)
647 * @edid: EDID block to scan
649 static int standard_timing_level(struct edid
*edid
)
651 if (edid
->revision
>= 2) {
652 if (edid
->revision
>= 4 && (edid
->features
& DRM_EDID_FEATURE_DEFAULT_GTF
))
654 if (drm_gtf2_hbreak(edid
))
662 * 0 is reserved. The spec says 0x01 fill for unused timings. Some old
663 * monitors fill with ascii space (0x20) instead.
666 bad_std_timing(u8 a
, u8 b
)
668 return (a
== 0x00 && b
== 0x00) ||
669 (a
== 0x01 && b
== 0x01) ||
670 (a
== 0x20 && b
== 0x20);
674 * drm_mode_std - convert standard mode info (width, height, refresh) into mode
675 * @t: standard timing params
676 * @timing_level: standard timing level
678 * Take the standard timing params (in this case width, aspect, and refresh)
679 * and convert them into a real mode using CVT/GTF/DMT.
681 static struct drm_display_mode
*
682 drm_mode_std(struct drm_connector
*connector
, struct edid
*edid
,
683 struct std_timing
*t
, int revision
)
685 struct drm_device
*dev
= connector
->dev
;
686 struct drm_display_mode
*m
, *mode
= NULL
;
689 unsigned aspect_ratio
= (t
->vfreq_aspect
& EDID_TIMING_ASPECT_MASK
)
690 >> EDID_TIMING_ASPECT_SHIFT
;
691 unsigned vfreq
= (t
->vfreq_aspect
& EDID_TIMING_VFREQ_MASK
)
692 >> EDID_TIMING_VFREQ_SHIFT
;
693 int timing_level
= standard_timing_level(edid
);
695 if (bad_std_timing(t
->hsize
, t
->vfreq_aspect
))
698 /* According to the EDID spec, the hdisplay = hsize * 8 + 248 */
699 hsize
= t
->hsize
* 8 + 248;
700 /* vrefresh_rate = vfreq + 60 */
701 vrefresh_rate
= vfreq
+ 60;
702 /* the vdisplay is calculated based on the aspect ratio */
703 if (aspect_ratio
== 0) {
707 vsize
= (hsize
* 10) / 16;
708 } else if (aspect_ratio
== 1)
709 vsize
= (hsize
* 3) / 4;
710 else if (aspect_ratio
== 2)
711 vsize
= (hsize
* 4) / 5;
713 vsize
= (hsize
* 9) / 16;
715 /* HDTV hack, part 1 */
716 if (vrefresh_rate
== 60 &&
717 ((hsize
== 1360 && vsize
== 765) ||
718 (hsize
== 1368 && vsize
== 769))) {
724 * If this connector already has a mode for this size and refresh
725 * rate (because it came from detailed or CVT info), use that
726 * instead. This way we don't have to guess at interlace or
729 list_for_each_entry(m
, &connector
->probed_modes
, head
)
730 if (m
->hdisplay
== hsize
&& m
->vdisplay
== vsize
&&
731 drm_mode_vrefresh(m
) == vrefresh_rate
)
734 /* HDTV hack, part 2 */
735 if (hsize
== 1366 && vsize
== 768 && vrefresh_rate
== 60) {
736 mode
= drm_cvt_mode(dev
, 1366, 768, vrefresh_rate
, 0, 0,
738 mode
->hdisplay
= 1366;
739 mode
->hsync_start
= mode
->hsync_start
- 1;
740 mode
->hsync_end
= mode
->hsync_end
- 1;
744 /* check whether it can be found in default mode table */
745 mode
= drm_mode_find_dmt(dev
, hsize
, vsize
, vrefresh_rate
);
749 switch (timing_level
) {
753 mode
= drm_gtf_mode(dev
, hsize
, vsize
, vrefresh_rate
, 0, 0);
757 * This is potentially wrong if there's ever a monitor with
758 * more than one ranges section, each claiming a different
759 * secondary GTF curve. Please don't do that.
761 mode
= drm_gtf_mode(dev
, hsize
, vsize
, vrefresh_rate
, 0, 0);
762 if (drm_mode_hsync(mode
) > drm_gtf2_hbreak(edid
)) {
764 mode
= drm_gtf_mode_complex(dev
, hsize
, vsize
,
773 mode
= drm_cvt_mode(dev
, hsize
, vsize
, vrefresh_rate
, 0, 0,
781 * EDID is delightfully ambiguous about how interlaced modes are to be
782 * encoded. Our internal representation is of frame height, but some
783 * HDTV detailed timings are encoded as field height.
785 * The format list here is from CEA, in frame size. Technically we
786 * should be checking refresh rate too. Whatever.
789 drm_mode_do_interlace_quirk(struct drm_display_mode
*mode
,
790 struct detailed_pixel_timing
*pt
)
793 static const struct {
795 } cea_interlaced
[] = {
805 if (!(pt
->misc
& DRM_EDID_PT_INTERLACED
))
808 for (i
= 0; i
< ARRAY_SIZE(cea_interlaced
); i
++) {
809 if ((mode
->hdisplay
== cea_interlaced
[i
].w
) &&
810 (mode
->vdisplay
== cea_interlaced
[i
].h
/ 2)) {
812 mode
->vsync_start
*= 2;
813 mode
->vsync_end
*= 2;
819 mode
->flags
|= DRM_MODE_FLAG_INTERLACE
;
823 * drm_mode_detailed - create a new mode from an EDID detailed timing section
824 * @dev: DRM device (needed to create new mode)
826 * @timing: EDID detailed timing info
827 * @quirks: quirks to apply
829 * An EDID detailed timing block contains enough info for us to create and
830 * return a new struct drm_display_mode.
832 static struct drm_display_mode
*drm_mode_detailed(struct drm_device
*dev
,
834 struct detailed_timing
*timing
,
837 struct drm_display_mode
*mode
;
838 struct detailed_pixel_timing
*pt
= &timing
->data
.pixel_data
;
839 unsigned hactive
= (pt
->hactive_hblank_hi
& 0xf0) << 4 | pt
->hactive_lo
;
840 unsigned vactive
= (pt
->vactive_vblank_hi
& 0xf0) << 4 | pt
->vactive_lo
;
841 unsigned hblank
= (pt
->hactive_hblank_hi
& 0xf) << 8 | pt
->hblank_lo
;
842 unsigned vblank
= (pt
->vactive_vblank_hi
& 0xf) << 8 | pt
->vblank_lo
;
843 unsigned hsync_offset
= (pt
->hsync_vsync_offset_pulse_width_hi
& 0xc0) << 2 | pt
->hsync_offset_lo
;
844 unsigned hsync_pulse_width
= (pt
->hsync_vsync_offset_pulse_width_hi
& 0x30) << 4 | pt
->hsync_pulse_width_lo
;
845 unsigned vsync_offset
= (pt
->hsync_vsync_offset_pulse_width_hi
& 0xc) >> 2 | pt
->vsync_offset_pulse_width_lo
>> 4;
846 unsigned vsync_pulse_width
= (pt
->hsync_vsync_offset_pulse_width_hi
& 0x3) << 4 | (pt
->vsync_offset_pulse_width_lo
& 0xf);
848 /* ignore tiny modes */
849 if (hactive
< 64 || vactive
< 64)
852 if (pt
->misc
& DRM_EDID_PT_STEREO
) {
853 printk(KERN_WARNING
"stereo mode not supported\n");
856 if (!(pt
->misc
& DRM_EDID_PT_SEPARATE_SYNC
)) {
857 printk(KERN_WARNING
"composite sync not supported\n");
860 /* it is incorrect if hsync/vsync width is zero */
861 if (!hsync_pulse_width
|| !vsync_pulse_width
) {
862 DRM_DEBUG_KMS("Incorrect Detailed timing. "
863 "Wrong Hsync/Vsync pulse width\n");
866 mode
= drm_mode_create(dev
);
870 mode
->type
= DRM_MODE_TYPE_DRIVER
;
872 if (quirks
& EDID_QUIRK_135_CLOCK_TOO_HIGH
)
873 timing
->pixel_clock
= cpu_to_le16(1088);
875 mode
->clock
= le16_to_cpu(timing
->pixel_clock
) * 10;
877 mode
->hdisplay
= hactive
;
878 mode
->hsync_start
= mode
->hdisplay
+ hsync_offset
;
879 mode
->hsync_end
= mode
->hsync_start
+ hsync_pulse_width
;
880 mode
->htotal
= mode
->hdisplay
+ hblank
;
882 mode
->vdisplay
= vactive
;
883 mode
->vsync_start
= mode
->vdisplay
+ vsync_offset
;
884 mode
->vsync_end
= mode
->vsync_start
+ vsync_pulse_width
;
885 mode
->vtotal
= mode
->vdisplay
+ vblank
;
887 /* Some EDIDs have bogus h/vtotal values */
888 if (mode
->hsync_end
> mode
->htotal
)
889 mode
->htotal
= mode
->hsync_end
+ 1;
890 if (mode
->vsync_end
> mode
->vtotal
)
891 mode
->vtotal
= mode
->vsync_end
+ 1;
893 drm_mode_do_interlace_quirk(mode
, pt
);
895 drm_mode_set_name(mode
);
897 if (quirks
& EDID_QUIRK_DETAILED_SYNC_PP
) {
898 pt
->misc
|= DRM_EDID_PT_HSYNC_POSITIVE
| DRM_EDID_PT_VSYNC_POSITIVE
;
901 mode
->flags
|= (pt
->misc
& DRM_EDID_PT_HSYNC_POSITIVE
) ?
902 DRM_MODE_FLAG_PHSYNC
: DRM_MODE_FLAG_NHSYNC
;
903 mode
->flags
|= (pt
->misc
& DRM_EDID_PT_VSYNC_POSITIVE
) ?
904 DRM_MODE_FLAG_PVSYNC
: DRM_MODE_FLAG_NVSYNC
;
906 mode
->width_mm
= pt
->width_mm_lo
| (pt
->width_height_mm_hi
& 0xf0) << 4;
907 mode
->height_mm
= pt
->height_mm_lo
| (pt
->width_height_mm_hi
& 0xf) << 8;
909 if (quirks
& EDID_QUIRK_DETAILED_IN_CM
) {
910 mode
->width_mm
*= 10;
911 mode
->height_mm
*= 10;
914 if (quirks
& EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE
) {
915 mode
->width_mm
= edid
->width_cm
* 10;
916 mode
->height_mm
= edid
->height_cm
* 10;
923 mode_is_rb(const struct drm_display_mode
*mode
)
925 return (mode
->htotal
- mode
->hdisplay
== 160) &&
926 (mode
->hsync_end
- mode
->hdisplay
== 80) &&
927 (mode
->hsync_end
- mode
->hsync_start
== 32) &&
928 (mode
->vsync_start
- mode
->vdisplay
== 3);
932 mode_in_hsync_range(const struct drm_display_mode
*mode
,
933 struct edid
*edid
, u8
*t
)
935 int hsync
, hmin
, hmax
;
938 if (edid
->revision
>= 4)
939 hmin
+= ((t
[4] & 0x04) ? 255 : 0);
941 if (edid
->revision
>= 4)
942 hmax
+= ((t
[4] & 0x08) ? 255 : 0);
943 hsync
= drm_mode_hsync(mode
);
945 return (hsync
<= hmax
&& hsync
>= hmin
);
949 mode_in_vsync_range(const struct drm_display_mode
*mode
,
950 struct edid
*edid
, u8
*t
)
952 int vsync
, vmin
, vmax
;
955 if (edid
->revision
>= 4)
956 vmin
+= ((t
[4] & 0x01) ? 255 : 0);
958 if (edid
->revision
>= 4)
959 vmax
+= ((t
[4] & 0x02) ? 255 : 0);
960 vsync
= drm_mode_vrefresh(mode
);
962 return (vsync
<= vmax
&& vsync
>= vmin
);
966 range_pixel_clock(struct edid
*edid
, u8
*t
)
969 if (t
[9] == 0 || t
[9] == 255)
972 /* 1.4 with CVT support gives us real precision, yay */
973 if (edid
->revision
>= 4 && t
[10] == 0x04)
974 return (t
[9] * 10000) - ((t
[12] >> 2) * 250);
976 /* 1.3 is pathetic, so fuzz up a bit */
977 return t
[9] * 10000 + 5001;
981 mode_in_range(const struct drm_display_mode
*mode
, struct edid
*edid
,
982 struct detailed_timing
*timing
)
985 u8
*t
= (u8
*)timing
;
987 if (!mode_in_hsync_range(mode
, edid
, t
))
990 if (!mode_in_vsync_range(mode
, edid
, t
))
993 if ((max_clock
= range_pixel_clock(edid
, t
)))
994 if (mode
->clock
> max_clock
)
997 /* 1.4 max horizontal check */
998 if (edid
->revision
>= 4 && t
[10] == 0x04)
999 if (t
[13] && mode
->hdisplay
> 8 * (t
[13] + (256 * (t
[12]&0x3))))
1002 if (mode_is_rb(mode
) && !drm_monitor_supports_rb(edid
))
1009 * XXX If drm_dmt_modes ever regrows the CVT-R modes (and it will) this will
1010 * need to account for them.
1013 drm_gtf_modes_for_range(struct drm_connector
*connector
, struct edid
*edid
,
1014 struct detailed_timing
*timing
)
1017 struct drm_display_mode
*newmode
;
1018 struct drm_device
*dev
= connector
->dev
;
1020 for (i
= 0; i
< drm_num_dmt_modes
; i
++) {
1021 if (mode_in_range(drm_dmt_modes
+ i
, edid
, timing
)) {
1022 newmode
= drm_mode_duplicate(dev
, &drm_dmt_modes
[i
]);
1024 drm_mode_probed_add(connector
, newmode
);
1034 do_inferred_modes(struct detailed_timing
*timing
, void *c
)
1036 struct detailed_mode_closure
*closure
= c
;
1037 struct detailed_non_pixel
*data
= &timing
->data
.other_data
;
1038 int gtf
= (closure
->edid
->features
& DRM_EDID_FEATURE_DEFAULT_GTF
);
1040 if (gtf
&& data
->type
== EDID_DETAIL_MONITOR_RANGE
)
1041 closure
->modes
+= drm_gtf_modes_for_range(closure
->connector
,
1047 add_inferred_modes(struct drm_connector
*connector
, struct edid
*edid
)
1049 struct detailed_mode_closure closure
= {
1050 connector
, edid
, 0, 0, 0
1053 if (version_greater(edid
, 1, 0))
1054 drm_for_each_detailed_block((u8
*)edid
, do_inferred_modes
,
1057 return closure
.modes
;
1061 drm_est3_modes(struct drm_connector
*connector
, struct detailed_timing
*timing
)
1063 int i
, j
, m
, modes
= 0;
1064 struct drm_display_mode
*mode
;
1065 u8
*est
= ((u8
*)timing
) + 5;
1067 for (i
= 0; i
< 6; i
++) {
1068 for (j
= 7; j
> 0; j
--) {
1069 m
= (i
* 8) + (7 - j
);
1070 if (m
>= ARRAY_SIZE(est3_modes
))
1072 if (est
[i
] & (1 << j
)) {
1073 mode
= drm_mode_find_dmt(connector
->dev
,
1077 /*, est3_modes[m].rb */);
1079 drm_mode_probed_add(connector
, mode
);
1090 do_established_modes(struct detailed_timing
*timing
, void *c
)
1092 struct detailed_mode_closure
*closure
= c
;
1093 struct detailed_non_pixel
*data
= &timing
->data
.other_data
;
1095 if (data
->type
== EDID_DETAIL_EST_TIMINGS
)
1096 closure
->modes
+= drm_est3_modes(closure
->connector
, timing
);
1100 * add_established_modes - get est. modes from EDID and add them
1101 * @edid: EDID block to scan
1103 * Each EDID block contains a bitmap of the supported "established modes" list
1104 * (defined above). Tease them out and add them to the global modes list.
1107 add_established_modes(struct drm_connector
*connector
, struct edid
*edid
)
1109 struct drm_device
*dev
= connector
->dev
;
1110 unsigned long est_bits
= edid
->established_timings
.t1
|
1111 (edid
->established_timings
.t2
<< 8) |
1112 ((edid
->established_timings
.mfg_rsvd
& 0x80) << 9);
1114 struct detailed_mode_closure closure
= {
1115 connector
, edid
, 0, 0, 0
1118 for (i
= 0; i
<= EDID_EST_TIMINGS
; i
++) {
1119 if (est_bits
& (1<<i
)) {
1120 struct drm_display_mode
*newmode
;
1121 newmode
= drm_mode_duplicate(dev
, &edid_est_modes
[i
]);
1123 drm_mode_probed_add(connector
, newmode
);
1129 if (version_greater(edid
, 1, 0))
1130 drm_for_each_detailed_block((u8
*)edid
,
1131 do_established_modes
, &closure
);
1133 return modes
+ closure
.modes
;
1137 do_standard_modes(struct detailed_timing
*timing
, void *c
)
1139 struct detailed_mode_closure
*closure
= c
;
1140 struct detailed_non_pixel
*data
= &timing
->data
.other_data
;
1141 struct drm_connector
*connector
= closure
->connector
;
1142 struct edid
*edid
= closure
->edid
;
1144 if (data
->type
== EDID_DETAIL_STD_MODES
) {
1146 for (i
= 0; i
< 6; i
++) {
1147 struct std_timing
*std
;
1148 struct drm_display_mode
*newmode
;
1150 std
= &data
->data
.timings
[i
];
1151 newmode
= drm_mode_std(connector
, edid
, std
,
1154 drm_mode_probed_add(connector
, newmode
);
1162 * add_standard_modes - get std. modes from EDID and add them
1163 * @edid: EDID block to scan
1165 * Standard modes can be calculated using the appropriate standard (DMT,
1166 * GTF or CVT. Grab them from @edid and add them to the list.
1169 add_standard_modes(struct drm_connector
*connector
, struct edid
*edid
)
1172 struct detailed_mode_closure closure
= {
1173 connector
, edid
, 0, 0, 0
1176 for (i
= 0; i
< EDID_STD_TIMINGS
; i
++) {
1177 struct drm_display_mode
*newmode
;
1179 newmode
= drm_mode_std(connector
, edid
,
1180 &edid
->standard_timings
[i
],
1183 drm_mode_probed_add(connector
, newmode
);
1188 if (version_greater(edid
, 1, 0))
1189 drm_for_each_detailed_block((u8
*)edid
, do_standard_modes
,
1192 /* XXX should also look for standard codes in VTB blocks */
1194 return modes
+ closure
.modes
;
1197 static int drm_cvt_modes(struct drm_connector
*connector
,
1198 struct detailed_timing
*timing
)
1200 int i
, j
, modes
= 0;
1201 struct drm_display_mode
*newmode
;
1202 struct drm_device
*dev
= connector
->dev
;
1203 struct cvt_timing
*cvt
;
1204 const int rates
[] = { 60, 85, 75, 60, 50 };
1205 const u8 empty
[3] = { 0, 0, 0 };
1207 for (i
= 0; i
< 4; i
++) {
1208 int uninitialized_var(width
), height
;
1209 cvt
= &(timing
->data
.other_data
.data
.cvt
[i
]);
1211 if (!memcmp(cvt
->code
, empty
, 3))
1214 height
= (cvt
->code
[0] + ((cvt
->code
[1] & 0xf0) << 4) + 1) * 2;
1215 switch (cvt
->code
[1] & 0x0c) {
1217 width
= height
* 4 / 3;
1220 width
= height
* 16 / 9;
1223 width
= height
* 16 / 10;
1226 width
= height
* 15 / 9;
1230 for (j
= 1; j
< 5; j
++) {
1231 if (cvt
->code
[2] & (1 << j
)) {
1232 newmode
= drm_cvt_mode(dev
, width
, height
,
1236 drm_mode_probed_add(connector
, newmode
);
1247 do_cvt_mode(struct detailed_timing
*timing
, void *c
)
1249 struct detailed_mode_closure
*closure
= c
;
1250 struct detailed_non_pixel
*data
= &timing
->data
.other_data
;
1252 if (data
->type
== EDID_DETAIL_CVT_3BYTE
)
1253 closure
->modes
+= drm_cvt_modes(closure
->connector
, timing
);
1257 add_cvt_modes(struct drm_connector
*connector
, struct edid
*edid
)
1259 struct detailed_mode_closure closure
= {
1260 connector
, edid
, 0, 0, 0
1263 if (version_greater(edid
, 1, 2))
1264 drm_for_each_detailed_block((u8
*)edid
, do_cvt_mode
, &closure
);
1266 /* XXX should also look for CVT codes in VTB blocks */
1268 return closure
.modes
;
1272 do_detailed_mode(struct detailed_timing
*timing
, void *c
)
1274 struct detailed_mode_closure
*closure
= c
;
1275 struct drm_display_mode
*newmode
;
1277 if (timing
->pixel_clock
) {
1278 newmode
= drm_mode_detailed(closure
->connector
->dev
,
1279 closure
->edid
, timing
,
1284 if (closure
->preferred
)
1285 newmode
->type
|= DRM_MODE_TYPE_PREFERRED
;
1287 drm_mode_probed_add(closure
->connector
, newmode
);
1289 closure
->preferred
= 0;
1294 * add_detailed_modes - Add modes from detailed timings
1295 * @connector: attached connector
1296 * @edid: EDID block to scan
1297 * @quirks: quirks to apply
1300 add_detailed_modes(struct drm_connector
*connector
, struct edid
*edid
,
1303 struct detailed_mode_closure closure
= {
1311 if (closure
.preferred
&& !version_greater(edid
, 1, 3))
1313 (edid
->features
& DRM_EDID_FEATURE_PREFERRED_TIMING
);
1315 drm_for_each_detailed_block((u8
*)edid
, do_detailed_mode
, &closure
);
1317 return closure
.modes
;
1320 #define HDMI_IDENTIFIER 0x000C03
1321 #define AUDIO_BLOCK 0x01
1322 #define VENDOR_BLOCK 0x03
1323 #define SPEAKER_BLOCK 0x04
1324 #define EDID_BASIC_AUDIO (1 << 6)
1327 * Search EDID for CEA extension block.
1329 u8
*drm_find_cea_extension(struct edid
*edid
)
1331 u8
*edid_ext
= NULL
;
1334 /* No EDID or EDID extensions */
1335 if (edid
== NULL
|| edid
->extensions
== 0)
1338 /* Find CEA extension */
1339 for (i
= 0; i
< edid
->extensions
; i
++) {
1340 edid_ext
= (u8
*)edid
+ EDID_LENGTH
* (i
+ 1);
1341 if (edid_ext
[0] == CEA_EXT
)
1345 if (i
== edid
->extensions
)
1350 EXPORT_SYMBOL(drm_find_cea_extension
);
1353 parse_hdmi_vsdb(struct drm_connector
*connector
, uint8_t *db
)
1355 connector
->eld
[5] |= (db
[6] >> 7) << 1; /* Supports_AI */
1357 connector
->dvi_dual
= db
[6] & 1;
1358 connector
->max_tmds_clock
= db
[7] * 5;
1360 connector
->latency_present
[0] = db
[8] >> 7;
1361 connector
->latency_present
[1] = (db
[8] >> 6) & 1;
1362 connector
->video_latency
[0] = db
[9];
1363 connector
->audio_latency
[0] = db
[10];
1364 connector
->video_latency
[1] = db
[11];
1365 connector
->audio_latency
[1] = db
[12];
1367 DRM_LOG_KMS("HDMI: DVI dual %d, "
1368 "max TMDS clock %d, "
1369 "latency present %d %d, "
1370 "video latency %d %d, "
1371 "audio latency %d %d\n",
1372 connector
->dvi_dual
,
1373 connector
->max_tmds_clock
,
1374 (int) connector
->latency_present
[0],
1375 (int) connector
->latency_present
[1],
1376 connector
->video_latency
[0],
1377 connector
->video_latency
[1],
1378 connector
->audio_latency
[0],
1379 connector
->audio_latency
[1]);
1383 monitor_name(struct detailed_timing
*t
, void *data
)
1385 if (t
->data
.other_data
.type
== EDID_DETAIL_MONITOR_NAME
)
1386 *(u8
**)data
= t
->data
.other_data
.data
.str
.str
;
1390 * drm_edid_to_eld - build ELD from EDID
1391 * @connector: connector corresponding to the HDMI/DP sink
1392 * @edid: EDID to parse
1394 * Fill the ELD (EDID-Like Data) buffer for passing to the audio driver.
1395 * Some ELD fields are left to the graphics driver caller:
1400 void drm_edid_to_eld(struct drm_connector
*connector
, struct edid
*edid
)
1402 uint8_t *eld
= connector
->eld
;
1410 memset(eld
, 0, sizeof(connector
->eld
));
1412 cea
= drm_find_cea_extension(edid
);
1414 DRM_DEBUG_KMS("ELD: no CEA Extension found\n");
1419 drm_for_each_detailed_block((u8
*)edid
, monitor_name
, &name
);
1420 for (mnl
= 0; name
&& mnl
< 13; mnl
++) {
1421 if (name
[mnl
] == 0x0a)
1423 eld
[20 + mnl
] = name
[mnl
];
1425 eld
[4] = (cea
[1] << 5) | mnl
;
1426 DRM_DEBUG_KMS("ELD monitor %s\n", eld
+ 20);
1428 eld
[0] = 2 << 3; /* ELD version: 2 */
1430 eld
[16] = edid
->mfg_id
[0];
1431 eld
[17] = edid
->mfg_id
[1];
1432 eld
[18] = edid
->prod_code
[0];
1433 eld
[19] = edid
->prod_code
[1];
1435 for (db
= cea
+ 4; db
< cea
+ cea
[2]; db
+= dbl
+ 1) {
1438 switch ((db
[0] & 0xe0) >> 5) {
1439 case AUDIO_BLOCK
: /* Audio Data Block, contains SADs */
1440 sad_count
= dbl
/ 3;
1441 memcpy(eld
+ 20 + mnl
, &db
[1], dbl
);
1443 case SPEAKER_BLOCK
: /* Speaker Allocation Data Block */
1447 /* HDMI Vendor-Specific Data Block */
1448 if (db
[1] == 0x03 && db
[2] == 0x0c && db
[3] == 0)
1449 parse_hdmi_vsdb(connector
, db
);
1455 eld
[5] |= sad_count
<< 4;
1456 eld
[2] = (20 + mnl
+ sad_count
* 3 + 3) / 4;
1458 DRM_DEBUG_KMS("ELD size %d, SAD count %d\n", (int)eld
[2], sad_count
);
1460 EXPORT_SYMBOL(drm_edid_to_eld
);
1463 * drm_av_sync_delay - HDMI/DP sink audio-video sync delay in millisecond
1464 * @connector: connector associated with the HDMI/DP sink
1465 * @mode: the display mode
1467 int drm_av_sync_delay(struct drm_connector
*connector
,
1468 struct drm_display_mode
*mode
)
1470 int i
= !!(mode
->flags
& DRM_MODE_FLAG_INTERLACE
);
1473 if (!connector
->latency_present
[0])
1475 if (!connector
->latency_present
[1])
1478 a
= connector
->audio_latency
[i
];
1479 v
= connector
->video_latency
[i
];
1482 * HDMI/DP sink doesn't support audio or video?
1484 if (a
== 255 || v
== 255)
1488 * Convert raw EDID values to millisecond.
1489 * Treat unknown latency as 0ms.
1492 a
= min(2 * (a
- 1), 500);
1494 v
= min(2 * (v
- 1), 500);
1496 return max(v
- a
, 0);
1498 EXPORT_SYMBOL(drm_av_sync_delay
);
1501 * drm_select_eld - select one ELD from multiple HDMI/DP sinks
1502 * @encoder: the encoder just changed display mode
1503 * @mode: the adjusted display mode
1505 * It's possible for one encoder to be associated with multiple HDMI/DP sinks.
1506 * The policy is now hard coded to simply use the first HDMI/DP sink's ELD.
1508 struct drm_connector
*drm_select_eld(struct drm_encoder
*encoder
,
1509 struct drm_display_mode
*mode
)
1511 struct drm_connector
*connector
;
1512 struct drm_device
*dev
= encoder
->dev
;
1514 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
)
1515 if (connector
->encoder
== encoder
&& connector
->eld
[0])
1520 EXPORT_SYMBOL(drm_select_eld
);
1523 * drm_detect_hdmi_monitor - detect whether monitor is hdmi.
1524 * @edid: monitor EDID information
1526 * Parse the CEA extension according to CEA-861-B.
1527 * Return true if HDMI, false if not or unknown.
1529 bool drm_detect_hdmi_monitor(struct edid
*edid
)
1533 int start_offset
, end_offset
;
1534 bool is_hdmi
= false;
1536 edid_ext
= drm_find_cea_extension(edid
);
1540 /* Data block offset in CEA extension block */
1542 end_offset
= edid_ext
[2];
1545 * Because HDMI identifier is in Vendor Specific Block,
1546 * search it from all data blocks of CEA extension.
1548 for (i
= start_offset
; i
< end_offset
;
1549 /* Increased by data block len */
1550 i
+= ((edid_ext
[i
] & 0x1f) + 1)) {
1551 /* Find vendor specific block */
1552 if ((edid_ext
[i
] >> 5) == VENDOR_BLOCK
) {
1553 hdmi_id
= edid_ext
[i
+ 1] | (edid_ext
[i
+ 2] << 8) |
1554 edid_ext
[i
+ 3] << 16;
1555 /* Find HDMI identifier */
1556 if (hdmi_id
== HDMI_IDENTIFIER
)
1565 EXPORT_SYMBOL(drm_detect_hdmi_monitor
);
1568 * drm_detect_monitor_audio - check monitor audio capability
1570 * Monitor should have CEA extension block.
1571 * If monitor has 'basic audio', but no CEA audio blocks, it's 'basic
1572 * audio' only. If there is any audio extension block and supported
1573 * audio format, assume at least 'basic audio' support, even if 'basic
1574 * audio' is not defined in EDID.
1577 bool drm_detect_monitor_audio(struct edid
*edid
)
1581 bool has_audio
= false;
1582 int start_offset
, end_offset
;
1584 edid_ext
= drm_find_cea_extension(edid
);
1588 has_audio
= ((edid_ext
[3] & EDID_BASIC_AUDIO
) != 0);
1591 DRM_DEBUG_KMS("Monitor has basic audio support\n");
1595 /* Data block offset in CEA extension block */
1597 end_offset
= edid_ext
[2];
1599 for (i
= start_offset
; i
< end_offset
;
1600 i
+= ((edid_ext
[i
] & 0x1f) + 1)) {
1601 if ((edid_ext
[i
] >> 5) == AUDIO_BLOCK
) {
1603 for (j
= 1; j
< (edid_ext
[i
] & 0x1f); j
+= 3)
1604 DRM_DEBUG_KMS("CEA audio format %d\n",
1605 (edid_ext
[i
+ j
] >> 3) & 0xf);
1612 EXPORT_SYMBOL(drm_detect_monitor_audio
);
1615 * drm_add_display_info - pull display info out if present
1617 * @info: display info (attached to connector)
1619 * Grab any available display info and stuff it into the drm_display_info
1620 * structure that's part of the connector. Useful for tracking bpp and
1623 static void drm_add_display_info(struct edid
*edid
,
1624 struct drm_display_info
*info
)
1628 info
->width_mm
= edid
->width_cm
* 10;
1629 info
->height_mm
= edid
->height_cm
* 10;
1631 /* driver figures it out in this case */
1633 info
->color_formats
= 0;
1635 /* Only defined for 1.4 with digital displays */
1636 if (edid
->revision
< 4)
1639 if (!(edid
->input
& DRM_EDID_INPUT_DIGITAL
))
1642 switch (edid
->input
& DRM_EDID_DIGITAL_DEPTH_MASK
) {
1643 case DRM_EDID_DIGITAL_DEPTH_6
:
1646 case DRM_EDID_DIGITAL_DEPTH_8
:
1649 case DRM_EDID_DIGITAL_DEPTH_10
:
1652 case DRM_EDID_DIGITAL_DEPTH_12
:
1655 case DRM_EDID_DIGITAL_DEPTH_14
:
1658 case DRM_EDID_DIGITAL_DEPTH_16
:
1661 case DRM_EDID_DIGITAL_DEPTH_UNDEF
:
1667 info
->color_formats
= DRM_COLOR_FORMAT_RGB444
;
1668 if (info
->color_formats
& DRM_EDID_FEATURE_RGB_YCRCB444
)
1669 info
->color_formats
= DRM_COLOR_FORMAT_YCRCB444
;
1670 if (info
->color_formats
& DRM_EDID_FEATURE_RGB_YCRCB422
)
1671 info
->color_formats
= DRM_COLOR_FORMAT_YCRCB422
;
1673 /* Get data from CEA blocks if present */
1674 edid_ext
= drm_find_cea_extension(edid
);
1678 info
->cea_rev
= edid_ext
[1];
1682 * drm_add_edid_modes - add modes from EDID data, if available
1683 * @connector: connector we're probing
1686 * Add the specified modes to the connector's mode list.
1688 * Return number of modes added or 0 if we couldn't find any.
1690 int drm_add_edid_modes(struct drm_connector
*connector
, struct edid
*edid
)
1698 if (!drm_edid_is_valid(edid
)) {
1699 dev_warn(connector
->dev
->dev
, "%s: EDID invalid.\n",
1700 drm_get_connector_name(connector
));
1704 quirks
= edid_get_quirks(edid
);
1707 * EDID spec says modes should be preferred in this order:
1708 * - preferred detailed mode
1709 * - other detailed modes from base block
1710 * - detailed modes from extension blocks
1711 * - CVT 3-byte code modes
1712 * - standard timing codes
1713 * - established timing codes
1714 * - modes inferred from GTF or CVT range information
1716 * We get this pretty much right.
1718 * XXX order for additional mode types in extension blocks?
1720 num_modes
+= add_detailed_modes(connector
, edid
, quirks
);
1721 num_modes
+= add_cvt_modes(connector
, edid
);
1722 num_modes
+= add_standard_modes(connector
, edid
);
1723 num_modes
+= add_established_modes(connector
, edid
);
1724 num_modes
+= add_inferred_modes(connector
, edid
);
1726 if (quirks
& (EDID_QUIRK_PREFER_LARGE_60
| EDID_QUIRK_PREFER_LARGE_75
))
1727 edid_fixup_preferred(connector
, quirks
);
1729 drm_add_display_info(edid
, &connector
->display_info
);
1733 EXPORT_SYMBOL(drm_add_edid_modes
);
1736 * drm_add_modes_noedid - add modes for the connectors without EDID
1737 * @connector: connector we're probing
1738 * @hdisplay: the horizontal display limit
1739 * @vdisplay: the vertical display limit
1741 * Add the specified modes to the connector's mode list. Only when the
1742 * hdisplay/vdisplay is not beyond the given limit, it will be added.
1744 * Return number of modes added or 0 if we couldn't find any.
1746 int drm_add_modes_noedid(struct drm_connector
*connector
,
1747 int hdisplay
, int vdisplay
)
1749 int i
, count
, num_modes
= 0;
1750 struct drm_display_mode
*mode
;
1751 struct drm_device
*dev
= connector
->dev
;
1753 count
= sizeof(drm_dmt_modes
) / sizeof(struct drm_display_mode
);
1759 for (i
= 0; i
< count
; i
++) {
1760 const struct drm_display_mode
*ptr
= &drm_dmt_modes
[i
];
1761 if (hdisplay
&& vdisplay
) {
1763 * Only when two are valid, they will be used to check
1764 * whether the mode should be added to the mode list of
1767 if (ptr
->hdisplay
> hdisplay
||
1768 ptr
->vdisplay
> vdisplay
)
1771 if (drm_mode_vrefresh(ptr
) > 61)
1773 mode
= drm_mode_duplicate(dev
, ptr
);
1775 drm_mode_probed_add(connector
, mode
);
1781 EXPORT_SYMBOL(drm_add_modes_noedid
);