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/i2c-algo-bit.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 EDID block (base or extension). Return 0 if the block
133 * doesn't check out, or 1 if it's valid.
136 drm_edid_block_valid(u8
*raw_edid
)
140 struct edid
*edid
= (struct edid
*)raw_edid
;
142 if (raw_edid
[0] == 0x00) {
145 for (i
= 0; i
< sizeof(edid_header
); i
++)
146 if (raw_edid
[i
] == edid_header
[i
])
150 else if (score
>= 6) {
151 DRM_DEBUG("Fixing EDID header, your hardware may be failing\n");
152 memcpy(raw_edid
, edid_header
, sizeof(edid_header
));
158 for (i
= 0; i
< EDID_LENGTH
; i
++)
161 DRM_ERROR("EDID checksum is invalid, remainder is %d\n", csum
);
163 /* allow CEA to slide through, switches mangle this */
164 if (raw_edid
[0] != 0x02)
168 /* per-block-type checks */
169 switch (raw_edid
[0]) {
171 if (edid
->version
!= 1) {
172 DRM_ERROR("EDID has major version %d, instead of 1\n", edid
->version
);
176 if (edid
->revision
> 4)
177 DRM_DEBUG("EDID minor > 4, assuming backward compatibility\n");
188 DRM_ERROR("Raw EDID:\n");
189 print_hex_dump_bytes(KERN_ERR
, DUMP_PREFIX_NONE
, raw_edid
, EDID_LENGTH
);
196 * drm_edid_is_valid - sanity check EDID data
199 * Sanity-check an entire EDID record (including extensions)
201 bool drm_edid_is_valid(struct edid
*edid
)
204 u8
*raw
= (u8
*)edid
;
209 for (i
= 0; i
<= edid
->extensions
; i
++)
210 if (!drm_edid_block_valid(raw
+ i
* EDID_LENGTH
))
215 EXPORT_SYMBOL(drm_edid_is_valid
);
217 #define DDC_ADDR 0x50
218 #define DDC_SEGMENT_ADDR 0x30
220 * Get EDID information via I2C.
222 * \param adapter : i2c device adaptor
223 * \param buf : EDID data buffer to be filled
224 * \param len : EDID data buffer length
225 * \return 0 on success or -1 on failure.
227 * Try to fetch EDID information by calling i2c driver function.
230 drm_do_probe_ddc_edid(struct i2c_adapter
*adapter
, unsigned char *buf
,
233 unsigned char start
= block
* EDID_LENGTH
;
234 struct i2c_msg msgs
[] = {
248 if (i2c_transfer(adapter
, msgs
, 2) == 2)
255 drm_do_get_edid(struct drm_connector
*connector
, struct i2c_adapter
*adapter
)
260 if ((block
= kmalloc(EDID_LENGTH
, GFP_KERNEL
)) == NULL
)
263 /* base block fetch */
264 for (i
= 0; i
< 4; i
++) {
265 if (drm_do_probe_ddc_edid(adapter
, block
, 0, EDID_LENGTH
))
267 if (drm_edid_block_valid(block
))
273 /* if there's no extensions, we're done */
274 if (block
[0x7e] == 0)
277 new = krealloc(block
, (block
[0x7e] + 1) * EDID_LENGTH
, GFP_KERNEL
);
282 for (j
= 1; j
<= block
[0x7e]; j
++) {
283 for (i
= 0; i
< 4; i
++) {
284 if (drm_do_probe_ddc_edid(adapter
, block
, j
,
287 if (drm_edid_block_valid(block
+ j
* EDID_LENGTH
))
297 dev_warn(connector
->dev
->dev
, "%s: EDID block %d invalid.\n",
298 drm_get_connector_name(connector
), j
);
306 * Probe DDC presence.
308 * \param adapter : i2c device adaptor
309 * \return 1 on success
312 drm_probe_ddc(struct i2c_adapter
*adapter
)
316 return (drm_do_probe_ddc_edid(adapter
, &out
, 0, 1) == 0);
320 * drm_get_edid - get EDID data, if available
321 * @connector: connector we're probing
322 * @adapter: i2c adapter to use for DDC
324 * Poke the given i2c channel to grab EDID data if possible. If found,
325 * attach it to the connector.
327 * Return edid data or NULL if we couldn't find any.
329 struct edid
*drm_get_edid(struct drm_connector
*connector
,
330 struct i2c_adapter
*adapter
)
332 struct edid
*edid
= NULL
;
334 if (drm_probe_ddc(adapter
))
335 edid
= (struct edid
*)drm_do_get_edid(connector
, adapter
);
337 connector
->display_info
.raw_edid
= (char *)edid
;
342 EXPORT_SYMBOL(drm_get_edid
);
344 /*** EDID parsing ***/
347 * edid_vendor - match a string against EDID's obfuscated vendor field
348 * @edid: EDID to match
349 * @vendor: vendor string
351 * Returns true if @vendor is in @edid, false otherwise
353 static bool edid_vendor(struct edid
*edid
, char *vendor
)
357 edid_vendor
[0] = ((edid
->mfg_id
[0] & 0x7c) >> 2) + '@';
358 edid_vendor
[1] = (((edid
->mfg_id
[0] & 0x3) << 3) |
359 ((edid
->mfg_id
[1] & 0xe0) >> 5)) + '@';
360 edid_vendor
[2] = (edid
->mfg_id
[1] & 0x1f) + '@';
362 return !strncmp(edid_vendor
, vendor
, 3);
366 * edid_get_quirks - return quirk flags for a given EDID
367 * @edid: EDID to process
369 * This tells subsequent routines what fixes they need to apply.
371 static u32
edid_get_quirks(struct edid
*edid
)
373 struct edid_quirk
*quirk
;
376 for (i
= 0; i
< ARRAY_SIZE(edid_quirk_list
); i
++) {
377 quirk
= &edid_quirk_list
[i
];
379 if (edid_vendor(edid
, quirk
->vendor
) &&
380 (EDID_PRODUCT_ID(edid
) == quirk
->product_id
))
381 return quirk
->quirks
;
387 #define MODE_SIZE(m) ((m)->hdisplay * (m)->vdisplay)
388 #define MODE_REFRESH_DIFF(m,r) (abs((m)->vrefresh - target_refresh))
391 * edid_fixup_preferred - set preferred modes based on quirk list
392 * @connector: has mode list to fix up
393 * @quirks: quirks list
395 * Walk the mode list for @connector, clearing the preferred status
396 * on existing modes and setting it anew for the right mode ala @quirks.
398 static void edid_fixup_preferred(struct drm_connector
*connector
,
401 struct drm_display_mode
*t
, *cur_mode
, *preferred_mode
;
402 int target_refresh
= 0;
404 if (list_empty(&connector
->probed_modes
))
407 if (quirks
& EDID_QUIRK_PREFER_LARGE_60
)
409 if (quirks
& EDID_QUIRK_PREFER_LARGE_75
)
412 preferred_mode
= list_first_entry(&connector
->probed_modes
,
413 struct drm_display_mode
, head
);
415 list_for_each_entry_safe(cur_mode
, t
, &connector
->probed_modes
, head
) {
416 cur_mode
->type
&= ~DRM_MODE_TYPE_PREFERRED
;
418 if (cur_mode
== preferred_mode
)
421 /* Largest mode is preferred */
422 if (MODE_SIZE(cur_mode
) > MODE_SIZE(preferred_mode
))
423 preferred_mode
= cur_mode
;
425 /* At a given size, try to get closest to target refresh */
426 if ((MODE_SIZE(cur_mode
) == MODE_SIZE(preferred_mode
)) &&
427 MODE_REFRESH_DIFF(cur_mode
, target_refresh
) <
428 MODE_REFRESH_DIFF(preferred_mode
, target_refresh
)) {
429 preferred_mode
= cur_mode
;
433 preferred_mode
->type
|= DRM_MODE_TYPE_PREFERRED
;
436 struct drm_display_mode
*drm_mode_find_dmt(struct drm_device
*dev
,
437 int hsize
, int vsize
, int fresh
)
440 struct drm_display_mode
*ptr
, *mode
;
443 for (i
= 0; i
< drm_num_dmt_modes
; i
++) {
444 ptr
= &drm_dmt_modes
[i
];
445 if (hsize
== ptr
->hdisplay
&&
446 vsize
== ptr
->vdisplay
&&
447 fresh
== drm_mode_vrefresh(ptr
)) {
448 /* get the expected default mode */
449 mode
= drm_mode_duplicate(dev
, ptr
);
455 EXPORT_SYMBOL(drm_mode_find_dmt
);
457 typedef void detailed_cb(struct detailed_timing
*timing
, void *closure
);
460 cea_for_each_detailed_block(u8
*ext
, detailed_cb
*cb
, void *closure
)
463 u8 rev
= ext
[0x01], d
= ext
[0x02];
464 u8
*det_base
= ext
+ d
;
471 /* have to infer how many blocks we have, check pixel clock */
472 for (i
= 0; i
< 6; i
++)
473 if (det_base
[18*i
] || det_base
[18*i
+1])
478 n
= min(ext
[0x03] & 0x0f, 6);
482 for (i
= 0; i
< n
; i
++)
483 cb((struct detailed_timing
*)(det_base
+ 18 * i
), closure
);
487 vtb_for_each_detailed_block(u8
*ext
, detailed_cb
*cb
, void *closure
)
489 unsigned int i
, n
= min((int)ext
[0x02], 6);
490 u8
*det_base
= ext
+ 5;
493 return; /* unknown version */
495 for (i
= 0; i
< n
; i
++)
496 cb((struct detailed_timing
*)(det_base
+ 18 * i
), closure
);
500 drm_for_each_detailed_block(u8
*raw_edid
, detailed_cb
*cb
, void *closure
)
503 struct edid
*edid
= (struct edid
*)raw_edid
;
508 for (i
= 0; i
< EDID_DETAILED_TIMINGS
; i
++)
509 cb(&(edid
->detailed_timings
[i
]), closure
);
511 for (i
= 1; i
<= raw_edid
[0x7e]; i
++) {
512 u8
*ext
= raw_edid
+ (i
* EDID_LENGTH
);
515 cea_for_each_detailed_block(ext
, cb
, closure
);
518 vtb_for_each_detailed_block(ext
, cb
, closure
);
527 is_rb(struct detailed_timing
*t
, void *data
)
530 if (r
[3] == EDID_DETAIL_MONITOR_RANGE
)
532 *(bool *)data
= true;
535 /* EDID 1.4 defines this explicitly. For EDID 1.3, we guess, badly. */
537 drm_monitor_supports_rb(struct edid
*edid
)
539 if (edid
->revision
>= 4) {
541 drm_for_each_detailed_block((u8
*)edid
, is_rb
, &ret
);
545 return ((edid
->input
& DRM_EDID_INPUT_DIGITAL
) != 0);
549 find_gtf2(struct detailed_timing
*t
, void *data
)
552 if (r
[3] == EDID_DETAIL_MONITOR_RANGE
&& r
[10] == 0x02)
556 /* Secondary GTF curve kicks in above some break frequency */
558 drm_gtf2_hbreak(struct edid
*edid
)
561 drm_for_each_detailed_block((u8
*)edid
, find_gtf2
, &r
);
562 return r
? (r
[12] * 2) : 0;
566 drm_gtf2_2c(struct edid
*edid
)
569 drm_for_each_detailed_block((u8
*)edid
, find_gtf2
, &r
);
570 return r
? r
[13] : 0;
574 drm_gtf2_m(struct edid
*edid
)
577 drm_for_each_detailed_block((u8
*)edid
, find_gtf2
, &r
);
578 return r
? (r
[15] << 8) + r
[14] : 0;
582 drm_gtf2_k(struct edid
*edid
)
585 drm_for_each_detailed_block((u8
*)edid
, find_gtf2
, &r
);
586 return r
? r
[16] : 0;
590 drm_gtf2_2j(struct edid
*edid
)
593 drm_for_each_detailed_block((u8
*)edid
, find_gtf2
, &r
);
594 return r
? r
[17] : 0;
598 * standard_timing_level - get std. timing level(CVT/GTF/DMT)
599 * @edid: EDID block to scan
601 static int standard_timing_level(struct edid
*edid
)
603 if (edid
->revision
>= 2) {
604 if (edid
->revision
>= 4 && (edid
->features
& DRM_EDID_FEATURE_DEFAULT_GTF
))
606 if (drm_gtf2_hbreak(edid
))
614 * 0 is reserved. The spec says 0x01 fill for unused timings. Some old
615 * monitors fill with ascii space (0x20) instead.
618 bad_std_timing(u8 a
, u8 b
)
620 return (a
== 0x00 && b
== 0x00) ||
621 (a
== 0x01 && b
== 0x01) ||
622 (a
== 0x20 && b
== 0x20);
626 * drm_mode_std - convert standard mode info (width, height, refresh) into mode
627 * @t: standard timing params
628 * @timing_level: standard timing level
630 * Take the standard timing params (in this case width, aspect, and refresh)
631 * and convert them into a real mode using CVT/GTF/DMT.
633 static struct drm_display_mode
*
634 drm_mode_std(struct drm_connector
*connector
, struct edid
*edid
,
635 struct std_timing
*t
, int revision
)
637 struct drm_device
*dev
= connector
->dev
;
638 struct drm_display_mode
*m
, *mode
= NULL
;
641 unsigned aspect_ratio
= (t
->vfreq_aspect
& EDID_TIMING_ASPECT_MASK
)
642 >> EDID_TIMING_ASPECT_SHIFT
;
643 unsigned vfreq
= (t
->vfreq_aspect
& EDID_TIMING_VFREQ_MASK
)
644 >> EDID_TIMING_VFREQ_SHIFT
;
645 int timing_level
= standard_timing_level(edid
);
647 if (bad_std_timing(t
->hsize
, t
->vfreq_aspect
))
650 /* According to the EDID spec, the hdisplay = hsize * 8 + 248 */
651 hsize
= t
->hsize
* 8 + 248;
652 /* vrefresh_rate = vfreq + 60 */
653 vrefresh_rate
= vfreq
+ 60;
654 /* the vdisplay is calculated based on the aspect ratio */
655 if (aspect_ratio
== 0) {
659 vsize
= (hsize
* 10) / 16;
660 } else if (aspect_ratio
== 1)
661 vsize
= (hsize
* 3) / 4;
662 else if (aspect_ratio
== 2)
663 vsize
= (hsize
* 4) / 5;
665 vsize
= (hsize
* 9) / 16;
667 /* HDTV hack, part 1 */
668 if (vrefresh_rate
== 60 &&
669 ((hsize
== 1360 && vsize
== 765) ||
670 (hsize
== 1368 && vsize
== 769))) {
676 * If this connector already has a mode for this size and refresh
677 * rate (because it came from detailed or CVT info), use that
678 * instead. This way we don't have to guess at interlace or
681 list_for_each_entry(m
, &connector
->probed_modes
, head
)
682 if (m
->hdisplay
== hsize
&& m
->vdisplay
== vsize
&&
683 drm_mode_vrefresh(m
) == vrefresh_rate
)
686 /* HDTV hack, part 2 */
687 if (hsize
== 1366 && vsize
== 768 && vrefresh_rate
== 60) {
688 mode
= drm_cvt_mode(dev
, 1366, 768, vrefresh_rate
, 0, 0,
690 mode
->hdisplay
= 1366;
691 mode
->hsync_start
= mode
->hsync_start
- 1;
692 mode
->hsync_end
= mode
->hsync_end
- 1;
696 /* check whether it can be found in default mode table */
697 mode
= drm_mode_find_dmt(dev
, hsize
, vsize
, vrefresh_rate
);
701 switch (timing_level
) {
705 mode
= drm_gtf_mode(dev
, hsize
, vsize
, vrefresh_rate
, 0, 0);
709 * This is potentially wrong if there's ever a monitor with
710 * more than one ranges section, each claiming a different
711 * secondary GTF curve. Please don't do that.
713 mode
= drm_gtf_mode(dev
, hsize
, vsize
, vrefresh_rate
, 0, 0);
714 if (drm_mode_hsync(mode
) > drm_gtf2_hbreak(edid
)) {
716 mode
= drm_gtf_mode_complex(dev
, hsize
, vsize
,
725 mode
= drm_cvt_mode(dev
, hsize
, vsize
, vrefresh_rate
, 0, 0,
733 * EDID is delightfully ambiguous about how interlaced modes are to be
734 * encoded. Our internal representation is of frame height, but some
735 * HDTV detailed timings are encoded as field height.
737 * The format list here is from CEA, in frame size. Technically we
738 * should be checking refresh rate too. Whatever.
741 drm_mode_do_interlace_quirk(struct drm_display_mode
*mode
,
742 struct detailed_pixel_timing
*pt
)
745 static const struct {
747 } cea_interlaced
[] = {
756 static const int n_sizes
=
757 sizeof(cea_interlaced
)/sizeof(cea_interlaced
[0]);
759 if (!(pt
->misc
& DRM_EDID_PT_INTERLACED
))
762 for (i
= 0; i
< n_sizes
; i
++) {
763 if ((mode
->hdisplay
== cea_interlaced
[i
].w
) &&
764 (mode
->vdisplay
== cea_interlaced
[i
].h
/ 2)) {
766 mode
->vsync_start
*= 2;
767 mode
->vsync_end
*= 2;
773 mode
->flags
|= DRM_MODE_FLAG_INTERLACE
;
777 * drm_mode_detailed - create a new mode from an EDID detailed timing section
778 * @dev: DRM device (needed to create new mode)
780 * @timing: EDID detailed timing info
781 * @quirks: quirks to apply
783 * An EDID detailed timing block contains enough info for us to create and
784 * return a new struct drm_display_mode.
786 static struct drm_display_mode
*drm_mode_detailed(struct drm_device
*dev
,
788 struct detailed_timing
*timing
,
791 struct drm_display_mode
*mode
;
792 struct detailed_pixel_timing
*pt
= &timing
->data
.pixel_data
;
793 unsigned hactive
= (pt
->hactive_hblank_hi
& 0xf0) << 4 | pt
->hactive_lo
;
794 unsigned vactive
= (pt
->vactive_vblank_hi
& 0xf0) << 4 | pt
->vactive_lo
;
795 unsigned hblank
= (pt
->hactive_hblank_hi
& 0xf) << 8 | pt
->hblank_lo
;
796 unsigned vblank
= (pt
->vactive_vblank_hi
& 0xf) << 8 | pt
->vblank_lo
;
797 unsigned hsync_offset
= (pt
->hsync_vsync_offset_pulse_width_hi
& 0xc0) << 2 | pt
->hsync_offset_lo
;
798 unsigned hsync_pulse_width
= (pt
->hsync_vsync_offset_pulse_width_hi
& 0x30) << 4 | pt
->hsync_pulse_width_lo
;
799 unsigned vsync_offset
= (pt
->hsync_vsync_offset_pulse_width_hi
& 0xc) >> 2 | pt
->vsync_offset_pulse_width_lo
>> 4;
800 unsigned vsync_pulse_width
= (pt
->hsync_vsync_offset_pulse_width_hi
& 0x3) << 4 | (pt
->vsync_offset_pulse_width_lo
& 0xf);
802 /* ignore tiny modes */
803 if (hactive
< 64 || vactive
< 64)
806 if (pt
->misc
& DRM_EDID_PT_STEREO
) {
807 printk(KERN_WARNING
"stereo mode not supported\n");
810 if (!(pt
->misc
& DRM_EDID_PT_SEPARATE_SYNC
)) {
811 printk(KERN_WARNING
"composite sync not supported\n");
814 /* it is incorrect if hsync/vsync width is zero */
815 if (!hsync_pulse_width
|| !vsync_pulse_width
) {
816 DRM_DEBUG_KMS("Incorrect Detailed timing. "
817 "Wrong Hsync/Vsync pulse width\n");
820 mode
= drm_mode_create(dev
);
824 mode
->type
= DRM_MODE_TYPE_DRIVER
;
826 if (quirks
& EDID_QUIRK_135_CLOCK_TOO_HIGH
)
827 timing
->pixel_clock
= cpu_to_le16(1088);
829 mode
->clock
= le16_to_cpu(timing
->pixel_clock
) * 10;
831 mode
->hdisplay
= hactive
;
832 mode
->hsync_start
= mode
->hdisplay
+ hsync_offset
;
833 mode
->hsync_end
= mode
->hsync_start
+ hsync_pulse_width
;
834 mode
->htotal
= mode
->hdisplay
+ hblank
;
836 mode
->vdisplay
= vactive
;
837 mode
->vsync_start
= mode
->vdisplay
+ vsync_offset
;
838 mode
->vsync_end
= mode
->vsync_start
+ vsync_pulse_width
;
839 mode
->vtotal
= mode
->vdisplay
+ vblank
;
841 /* Some EDIDs have bogus h/vtotal values */
842 if (mode
->hsync_end
> mode
->htotal
)
843 mode
->htotal
= mode
->hsync_end
+ 1;
844 if (mode
->vsync_end
> mode
->vtotal
)
845 mode
->vtotal
= mode
->vsync_end
+ 1;
847 drm_mode_do_interlace_quirk(mode
, pt
);
849 drm_mode_set_name(mode
);
851 if (quirks
& EDID_QUIRK_DETAILED_SYNC_PP
) {
852 pt
->misc
|= DRM_EDID_PT_HSYNC_POSITIVE
| DRM_EDID_PT_VSYNC_POSITIVE
;
855 mode
->flags
|= (pt
->misc
& DRM_EDID_PT_HSYNC_POSITIVE
) ?
856 DRM_MODE_FLAG_PHSYNC
: DRM_MODE_FLAG_NHSYNC
;
857 mode
->flags
|= (pt
->misc
& DRM_EDID_PT_VSYNC_POSITIVE
) ?
858 DRM_MODE_FLAG_PVSYNC
: DRM_MODE_FLAG_NVSYNC
;
860 mode
->width_mm
= pt
->width_mm_lo
| (pt
->width_height_mm_hi
& 0xf0) << 4;
861 mode
->height_mm
= pt
->height_mm_lo
| (pt
->width_height_mm_hi
& 0xf) << 8;
863 if (quirks
& EDID_QUIRK_DETAILED_IN_CM
) {
864 mode
->width_mm
*= 10;
865 mode
->height_mm
*= 10;
868 if (quirks
& EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE
) {
869 mode
->width_mm
= edid
->width_cm
* 10;
870 mode
->height_mm
= edid
->height_cm
* 10;
877 mode_is_rb(struct drm_display_mode
*mode
)
879 return (mode
->htotal
- mode
->hdisplay
== 160) &&
880 (mode
->hsync_end
- mode
->hdisplay
== 80) &&
881 (mode
->hsync_end
- mode
->hsync_start
== 32) &&
882 (mode
->vsync_start
- mode
->vdisplay
== 3);
886 mode_in_hsync_range(struct drm_display_mode
*mode
, struct edid
*edid
, u8
*t
)
888 int hsync
, hmin
, hmax
;
891 if (edid
->revision
>= 4)
892 hmin
+= ((t
[4] & 0x04) ? 255 : 0);
894 if (edid
->revision
>= 4)
895 hmax
+= ((t
[4] & 0x08) ? 255 : 0);
896 hsync
= drm_mode_hsync(mode
);
898 return (hsync
<= hmax
&& hsync
>= hmin
);
902 mode_in_vsync_range(struct drm_display_mode
*mode
, struct edid
*edid
, u8
*t
)
904 int vsync
, vmin
, vmax
;
907 if (edid
->revision
>= 4)
908 vmin
+= ((t
[4] & 0x01) ? 255 : 0);
910 if (edid
->revision
>= 4)
911 vmax
+= ((t
[4] & 0x02) ? 255 : 0);
912 vsync
= drm_mode_vrefresh(mode
);
914 return (vsync
<= vmax
&& vsync
>= vmin
);
918 range_pixel_clock(struct edid
*edid
, u8
*t
)
921 if (t
[9] == 0 || t
[9] == 255)
924 /* 1.4 with CVT support gives us real precision, yay */
925 if (edid
->revision
>= 4 && t
[10] == 0x04)
926 return (t
[9] * 10000) - ((t
[12] >> 2) * 250);
928 /* 1.3 is pathetic, so fuzz up a bit */
929 return t
[9] * 10000 + 5001;
933 mode_in_range(struct drm_display_mode
*mode
, struct edid
*edid
,
934 struct detailed_timing
*timing
)
937 u8
*t
= (u8
*)timing
;
939 if (!mode_in_hsync_range(mode
, edid
, t
))
942 if (!mode_in_vsync_range(mode
, edid
, t
))
945 if ((max_clock
= range_pixel_clock(edid
, t
)))
946 if (mode
->clock
> max_clock
)
949 /* 1.4 max horizontal check */
950 if (edid
->revision
>= 4 && t
[10] == 0x04)
951 if (t
[13] && mode
->hdisplay
> 8 * (t
[13] + (256 * (t
[12]&0x3))))
954 if (mode_is_rb(mode
) && !drm_monitor_supports_rb(edid
))
961 * XXX If drm_dmt_modes ever regrows the CVT-R modes (and it will) this will
962 * need to account for them.
965 drm_gtf_modes_for_range(struct drm_connector
*connector
, struct edid
*edid
,
966 struct detailed_timing
*timing
)
969 struct drm_display_mode
*newmode
;
970 struct drm_device
*dev
= connector
->dev
;
972 for (i
= 0; i
< drm_num_dmt_modes
; i
++) {
973 if (mode_in_range(drm_dmt_modes
+ i
, edid
, timing
)) {
974 newmode
= drm_mode_duplicate(dev
, &drm_dmt_modes
[i
]);
976 drm_mode_probed_add(connector
, newmode
);
986 do_inferred_modes(struct detailed_timing
*timing
, void *c
)
988 struct detailed_mode_closure
*closure
= c
;
989 struct detailed_non_pixel
*data
= &timing
->data
.other_data
;
990 int gtf
= (closure
->edid
->features
& DRM_EDID_FEATURE_DEFAULT_GTF
);
992 if (gtf
&& data
->type
== EDID_DETAIL_MONITOR_RANGE
)
993 closure
->modes
+= drm_gtf_modes_for_range(closure
->connector
,
999 add_inferred_modes(struct drm_connector
*connector
, struct edid
*edid
)
1001 struct detailed_mode_closure closure
= {
1002 connector
, edid
, 0, 0, 0
1005 if (version_greater(edid
, 1, 0))
1006 drm_for_each_detailed_block((u8
*)edid
, do_inferred_modes
,
1009 return closure
.modes
;
1013 drm_est3_modes(struct drm_connector
*connector
, struct detailed_timing
*timing
)
1015 int i
, j
, m
, modes
= 0;
1016 struct drm_display_mode
*mode
;
1017 u8
*est
= ((u8
*)timing
) + 5;
1019 for (i
= 0; i
< 6; i
++) {
1020 for (j
= 7; j
> 0; j
--) {
1021 m
= (i
* 8) + (7 - j
);
1022 if (m
>= num_est3_modes
)
1024 if (est
[i
] & (1 << j
)) {
1025 mode
= drm_mode_find_dmt(connector
->dev
,
1029 /*, est3_modes[m].rb */);
1031 drm_mode_probed_add(connector
, mode
);
1042 do_established_modes(struct detailed_timing
*timing
, void *c
)
1044 struct detailed_mode_closure
*closure
= c
;
1045 struct detailed_non_pixel
*data
= &timing
->data
.other_data
;
1047 if (data
->type
== EDID_DETAIL_EST_TIMINGS
)
1048 closure
->modes
+= drm_est3_modes(closure
->connector
, timing
);
1052 * add_established_modes - get est. modes from EDID and add them
1053 * @edid: EDID block to scan
1055 * Each EDID block contains a bitmap of the supported "established modes" list
1056 * (defined above). Tease them out and add them to the global modes list.
1059 add_established_modes(struct drm_connector
*connector
, struct edid
*edid
)
1061 struct drm_device
*dev
= connector
->dev
;
1062 unsigned long est_bits
= edid
->established_timings
.t1
|
1063 (edid
->established_timings
.t2
<< 8) |
1064 ((edid
->established_timings
.mfg_rsvd
& 0x80) << 9);
1066 struct detailed_mode_closure closure
= {
1067 connector
, edid
, 0, 0, 0
1070 for (i
= 0; i
<= EDID_EST_TIMINGS
; i
++) {
1071 if (est_bits
& (1<<i
)) {
1072 struct drm_display_mode
*newmode
;
1073 newmode
= drm_mode_duplicate(dev
, &edid_est_modes
[i
]);
1075 drm_mode_probed_add(connector
, newmode
);
1081 if (version_greater(edid
, 1, 0))
1082 drm_for_each_detailed_block((u8
*)edid
,
1083 do_established_modes
, &closure
);
1085 return modes
+ closure
.modes
;
1089 do_standard_modes(struct detailed_timing
*timing
, void *c
)
1091 struct detailed_mode_closure
*closure
= c
;
1092 struct detailed_non_pixel
*data
= &timing
->data
.other_data
;
1093 struct drm_connector
*connector
= closure
->connector
;
1094 struct edid
*edid
= closure
->edid
;
1096 if (data
->type
== EDID_DETAIL_STD_MODES
) {
1098 for (i
= 0; i
< 6; i
++) {
1099 struct std_timing
*std
;
1100 struct drm_display_mode
*newmode
;
1102 std
= &data
->data
.timings
[i
];
1103 newmode
= drm_mode_std(connector
, edid
, std
,
1106 drm_mode_probed_add(connector
, newmode
);
1114 * add_standard_modes - get std. modes from EDID and add them
1115 * @edid: EDID block to scan
1117 * Standard modes can be calculated using the appropriate standard (DMT,
1118 * GTF or CVT. Grab them from @edid and add them to the list.
1121 add_standard_modes(struct drm_connector
*connector
, struct edid
*edid
)
1124 struct detailed_mode_closure closure
= {
1125 connector
, edid
, 0, 0, 0
1128 for (i
= 0; i
< EDID_STD_TIMINGS
; i
++) {
1129 struct drm_display_mode
*newmode
;
1131 newmode
= drm_mode_std(connector
, edid
,
1132 &edid
->standard_timings
[i
],
1135 drm_mode_probed_add(connector
, newmode
);
1140 if (version_greater(edid
, 1, 0))
1141 drm_for_each_detailed_block((u8
*)edid
, do_standard_modes
,
1144 /* XXX should also look for standard codes in VTB blocks */
1146 return modes
+ closure
.modes
;
1149 static int drm_cvt_modes(struct drm_connector
*connector
,
1150 struct detailed_timing
*timing
)
1152 int i
, j
, modes
= 0;
1153 struct drm_display_mode
*newmode
;
1154 struct drm_device
*dev
= connector
->dev
;
1155 struct cvt_timing
*cvt
;
1156 const int rates
[] = { 60, 85, 75, 60, 50 };
1157 const u8 empty
[3] = { 0, 0, 0 };
1159 for (i
= 0; i
< 4; i
++) {
1160 int uninitialized_var(width
), height
;
1161 cvt
= &(timing
->data
.other_data
.data
.cvt
[i
]);
1163 if (!memcmp(cvt
->code
, empty
, 3))
1166 height
= (cvt
->code
[0] + ((cvt
->code
[1] & 0xf0) << 4) + 1) * 2;
1167 switch (cvt
->code
[1] & 0x0c) {
1169 width
= height
* 4 / 3;
1172 width
= height
* 16 / 9;
1175 width
= height
* 16 / 10;
1178 width
= height
* 15 / 9;
1182 for (j
= 1; j
< 5; j
++) {
1183 if (cvt
->code
[2] & (1 << j
)) {
1184 newmode
= drm_cvt_mode(dev
, width
, height
,
1188 drm_mode_probed_add(connector
, newmode
);
1199 do_cvt_mode(struct detailed_timing
*timing
, void *c
)
1201 struct detailed_mode_closure
*closure
= c
;
1202 struct detailed_non_pixel
*data
= &timing
->data
.other_data
;
1204 if (data
->type
== EDID_DETAIL_CVT_3BYTE
)
1205 closure
->modes
+= drm_cvt_modes(closure
->connector
, timing
);
1209 add_cvt_modes(struct drm_connector
*connector
, struct edid
*edid
)
1211 struct detailed_mode_closure closure
= {
1212 connector
, edid
, 0, 0, 0
1215 if (version_greater(edid
, 1, 2))
1216 drm_for_each_detailed_block((u8
*)edid
, do_cvt_mode
, &closure
);
1218 /* XXX should also look for CVT codes in VTB blocks */
1220 return closure
.modes
;
1224 do_detailed_mode(struct detailed_timing
*timing
, void *c
)
1226 struct detailed_mode_closure
*closure
= c
;
1227 struct drm_display_mode
*newmode
;
1229 if (timing
->pixel_clock
) {
1230 newmode
= drm_mode_detailed(closure
->connector
->dev
,
1231 closure
->edid
, timing
,
1236 if (closure
->preferred
)
1237 newmode
->type
|= DRM_MODE_TYPE_PREFERRED
;
1239 drm_mode_probed_add(closure
->connector
, newmode
);
1241 closure
->preferred
= 0;
1246 * add_detailed_modes - Add modes from detailed timings
1247 * @connector: attached connector
1248 * @edid: EDID block to scan
1249 * @quirks: quirks to apply
1252 add_detailed_modes(struct drm_connector
*connector
, struct edid
*edid
,
1255 struct detailed_mode_closure closure
= {
1263 if (closure
.preferred
&& !version_greater(edid
, 1, 3))
1265 (edid
->features
& DRM_EDID_FEATURE_PREFERRED_TIMING
);
1267 drm_for_each_detailed_block((u8
*)edid
, do_detailed_mode
, &closure
);
1269 return closure
.modes
;
1272 #define HDMI_IDENTIFIER 0x000C03
1273 #define VENDOR_BLOCK 0x03
1275 * drm_detect_hdmi_monitor - detect whether monitor is hdmi.
1276 * @edid: monitor EDID information
1278 * Parse the CEA extension according to CEA-861-B.
1279 * Return true if HDMI, false if not or unknown.
1281 bool drm_detect_hdmi_monitor(struct edid
*edid
)
1283 char *edid_ext
= NULL
;
1285 int start_offset
, end_offset
;
1286 bool is_hdmi
= false;
1288 /* No EDID or EDID extensions */
1289 if (edid
== NULL
|| edid
->extensions
== 0)
1292 /* Find CEA extension */
1293 for (i
= 0; i
< edid
->extensions
; i
++) {
1294 edid_ext
= (char *)edid
+ EDID_LENGTH
* (i
+ 1);
1295 /* This block is CEA extension */
1296 if (edid_ext
[0] == 0x02)
1300 if (i
== edid
->extensions
)
1303 /* Data block offset in CEA extension block */
1305 end_offset
= edid_ext
[2];
1308 * Because HDMI identifier is in Vendor Specific Block,
1309 * search it from all data blocks of CEA extension.
1311 for (i
= start_offset
; i
< end_offset
;
1312 /* Increased by data block len */
1313 i
+= ((edid_ext
[i
] & 0x1f) + 1)) {
1314 /* Find vendor specific block */
1315 if ((edid_ext
[i
] >> 5) == VENDOR_BLOCK
) {
1316 hdmi_id
= edid_ext
[i
+ 1] | (edid_ext
[i
+ 2] << 8) |
1317 edid_ext
[i
+ 3] << 16;
1318 /* Find HDMI identifier */
1319 if (hdmi_id
== HDMI_IDENTIFIER
)
1328 EXPORT_SYMBOL(drm_detect_hdmi_monitor
);
1331 * drm_add_edid_modes - add modes from EDID data, if available
1332 * @connector: connector we're probing
1335 * Add the specified modes to the connector's mode list.
1337 * Return number of modes added or 0 if we couldn't find any.
1339 int drm_add_edid_modes(struct drm_connector
*connector
, struct edid
*edid
)
1347 if (!drm_edid_is_valid(edid
)) {
1348 dev_warn(connector
->dev
->dev
, "%s: EDID invalid.\n",
1349 drm_get_connector_name(connector
));
1353 quirks
= edid_get_quirks(edid
);
1356 * EDID spec says modes should be preferred in this order:
1357 * - preferred detailed mode
1358 * - other detailed modes from base block
1359 * - detailed modes from extension blocks
1360 * - CVT 3-byte code modes
1361 * - standard timing codes
1362 * - established timing codes
1363 * - modes inferred from GTF or CVT range information
1365 * We get this pretty much right.
1367 * XXX order for additional mode types in extension blocks?
1369 num_modes
+= add_detailed_modes(connector
, edid
, quirks
);
1370 num_modes
+= add_cvt_modes(connector
, edid
);
1371 num_modes
+= add_standard_modes(connector
, edid
);
1372 num_modes
+= add_established_modes(connector
, edid
);
1373 num_modes
+= add_inferred_modes(connector
, edid
);
1375 if (quirks
& (EDID_QUIRK_PREFER_LARGE_60
| EDID_QUIRK_PREFER_LARGE_75
))
1376 edid_fixup_preferred(connector
, quirks
);
1378 connector
->display_info
.width_mm
= edid
->width_cm
* 10;
1379 connector
->display_info
.height_mm
= edid
->height_cm
* 10;
1383 EXPORT_SYMBOL(drm_add_edid_modes
);
1386 * drm_add_modes_noedid - add modes for the connectors without EDID
1387 * @connector: connector we're probing
1388 * @hdisplay: the horizontal display limit
1389 * @vdisplay: the vertical display limit
1391 * Add the specified modes to the connector's mode list. Only when the
1392 * hdisplay/vdisplay is not beyond the given limit, it will be added.
1394 * Return number of modes added or 0 if we couldn't find any.
1396 int drm_add_modes_noedid(struct drm_connector
*connector
,
1397 int hdisplay
, int vdisplay
)
1399 int i
, count
, num_modes
= 0;
1400 struct drm_display_mode
*mode
, *ptr
;
1401 struct drm_device
*dev
= connector
->dev
;
1403 count
= sizeof(drm_dmt_modes
) / sizeof(struct drm_display_mode
);
1409 for (i
= 0; i
< count
; i
++) {
1410 ptr
= &drm_dmt_modes
[i
];
1411 if (hdisplay
&& vdisplay
) {
1413 * Only when two are valid, they will be used to check
1414 * whether the mode should be added to the mode list of
1417 if (ptr
->hdisplay
> hdisplay
||
1418 ptr
->vdisplay
> vdisplay
)
1421 if (drm_mode_vrefresh(ptr
) > 61)
1423 mode
= drm_mode_duplicate(dev
, ptr
);
1425 drm_mode_probed_add(connector
, mode
);
1431 EXPORT_SYMBOL(drm_add_modes_noedid
);