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 * $FreeBSD: head/sys/dev/drm2/drm_edid.c 249041 2013-04-03 08:27:35Z dumbbell $
34 #include <drm/drm_edid.h>
35 #include "drm_edid_modes.h"
36 #include <bus/iicbus/iic.h>
37 #include <bus/iicbus/iiconf.h>
38 #include "iicbus_if.h"
40 #define version_greater(edid, maj, min) \
41 (((edid)->version > (maj)) || \
42 ((edid)->version == (maj) && (edid)->revision > (min)))
44 #define EDID_EST_TIMINGS 16
45 #define EDID_STD_TIMINGS 8
46 #define EDID_DETAILED_TIMINGS 4
49 * EDID blocks out in the wild have a variety of bugs, try to collect
50 * them here (note that userspace may work around broken monitors first,
51 * but fixes should make their way here so that the kernel "just works"
52 * on as many displays as possible).
55 /* First detailed mode wrong, use largest 60Hz mode */
56 #define EDID_QUIRK_PREFER_LARGE_60 (1 << 0)
57 /* Reported 135MHz pixel clock is too high, needs adjustment */
58 #define EDID_QUIRK_135_CLOCK_TOO_HIGH (1 << 1)
59 /* Prefer the largest mode at 75 Hz */
60 #define EDID_QUIRK_PREFER_LARGE_75 (1 << 2)
61 /* Detail timing is in cm not mm */
62 #define EDID_QUIRK_DETAILED_IN_CM (1 << 3)
63 /* Detailed timing descriptors have bogus size values, so just take the
64 * maximum size and use that.
66 #define EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE (1 << 4)
67 /* Monitor forgot to set the first detailed is preferred bit. */
68 #define EDID_QUIRK_FIRST_DETAILED_PREFERRED (1 << 5)
69 /* use +hsync +vsync for detailed mode */
70 #define EDID_QUIRK_DETAILED_SYNC_PP (1 << 6)
72 struct detailed_mode_closure {
73 struct drm_connector *connector;
85 static struct edid_quirk {
89 } edid_quirk_list[] = {
91 { "ACR", 44358, EDID_QUIRK_PREFER_LARGE_60 },
93 { "API", 0x7602, EDID_QUIRK_PREFER_LARGE_60 },
95 { "ACR", 2423, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
97 /* Belinea 10 15 55 */
98 { "MAX", 1516, EDID_QUIRK_PREFER_LARGE_60 },
99 { "MAX", 0x77e, EDID_QUIRK_PREFER_LARGE_60 },
101 /* Envision Peripherals, Inc. EN-7100e */
102 { "EPI", 59264, EDID_QUIRK_135_CLOCK_TOO_HIGH },
103 /* Envision EN2028 */
104 { "EPI", 8232, EDID_QUIRK_PREFER_LARGE_60 },
106 /* Funai Electronics PM36B */
107 { "FCM", 13600, EDID_QUIRK_PREFER_LARGE_75 |
108 EDID_QUIRK_DETAILED_IN_CM },
110 /* LG Philips LCD LP154W01-A5 */
111 { "LPL", 0, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
112 { "LPL", 0x2a00, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
114 /* Philips 107p5 CRT */
115 { "PHL", 57364, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
118 { "PTS", 765, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
120 /* Samsung SyncMaster 205BW. Note: irony */
121 { "SAM", 541, EDID_QUIRK_DETAILED_SYNC_PP },
122 /* Samsung SyncMaster 22[5-6]BW */
123 { "SAM", 596, EDID_QUIRK_PREFER_LARGE_60 },
124 { "SAM", 638, EDID_QUIRK_PREFER_LARGE_60 },
127 /*** DDC fetch and block validation ***/
129 static const u8 edid_header[] = {
130 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00
134 * Sanity check the header of the base EDID block. Return 8 if the header
135 * is perfect, down to 0 if it's totally wrong.
137 int drm_edid_header_is_valid(const u8 *raw_edid)
141 for (i = 0; i < sizeof(edid_header); i++)
142 if (raw_edid[i] == edid_header[i])
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 DRM_DEBUG_KMS("Raw EDID:\n");
201 if ((drm_debug_flag & DRM_DEBUGBITS_KMS) != 0) {
202 for (i = 0; i < EDID_LENGTH; ) {
203 kprintf("%02x", raw_edid[i]);
205 if (i % 16 == 0 || i == EDID_LENGTH)
218 * drm_edid_is_valid - sanity check EDID data
221 * Sanity-check an entire EDID record (including extensions)
223 bool drm_edid_is_valid(struct edid *edid)
226 u8 *raw = (u8 *)edid;
231 for (i = 0; i <= edid->extensions; i++)
232 if (!drm_edid_block_valid(raw + i * EDID_LENGTH))
238 #define DDC_ADDR 0x50
239 #define DDC_SEGMENT_ADDR 0x30
241 * Get EDID information via I2C.
243 * \param adapter : i2c device adaptor
244 * \param buf : EDID data buffer to be filled
245 * \param len : EDID data buffer length
246 * \return 0 on success or -1 on failure.
248 * Try to fetch EDID information by calling i2c driver function.
251 drm_do_probe_ddc_edid(device_t adapter, unsigned char *buf,
254 unsigned char start = block * EDID_LENGTH;
255 unsigned char segment = block >> 1;
256 unsigned char xfers = segment ? 3 : 2;
257 int ret, retries = 5;
259 /* The core i2c driver will automatically retry the transfer if the
260 * adapter reports EAGAIN. However, we find that bit-banging transfers
261 * are susceptible to errors under a heavily loaded machine and
262 * generate spurious NAKs and timeouts. Retrying the transfer
263 * of the individual block a few times seems to overcome this.
266 struct iic_msg msgs[] = {
268 .slave = DDC_SEGMENT_ADDR << 1,
273 .slave = DDC_ADDR << 1,
278 .slave = DDC_ADDR << 1,
286 * Avoid sending the segment addr to not upset non-compliant ddc
289 ret = iicbus_transfer(adapter, &msgs[3 - xfers], xfers);
292 DRM_DEBUG_KMS("iicbus_transfer countdown %d error %d\n",
294 } while (ret != 0 && --retries);
296 return (ret == 0 ? 0 : -1);
299 static bool drm_edid_is_zero(u8 *in_edid, int length)
302 u32 *raw_edid = (u32 *)in_edid;
304 for (i = 0; i < length / 4; i++)
305 if (*(raw_edid + i) != 0)
311 drm_do_get_edid(struct drm_connector *connector, device_t adapter)
313 int i, j = 0, valid_extensions = 0;
316 block = kmalloc(EDID_LENGTH, DRM_MEM_KMS, M_WAITOK | M_ZERO);
318 /* base block fetch */
319 for (i = 0; i < 4; i++) {
320 if (drm_do_probe_ddc_edid(adapter, block, 0, EDID_LENGTH))
322 if (drm_edid_block_valid(block))
324 if (i == 0 && drm_edid_is_zero(block, EDID_LENGTH)) {
325 connector->null_edid_counter++;
332 /* if there's no extensions, we're done */
333 if (block[0x7e] == 0)
336 new = krealloc(block, (block[0x7e] + 1) * EDID_LENGTH, DRM_MEM_KMS,
340 for (j = 1; j <= block[0x7e]; j++) {
341 for (i = 0; i < 4; i++) {
342 if (drm_do_probe_ddc_edid(adapter,
343 block + (valid_extensions + 1) * EDID_LENGTH,
346 if (drm_edid_block_valid(block + (valid_extensions + 1) * EDID_LENGTH)) {
352 DRM_DEBUG_KMS("%s: Ignoring invalid EDID block %d.\n",
353 drm_get_connector_name(connector), j);
356 if (valid_extensions != block[0x7e]) {
357 block[EDID_LENGTH-1] += block[0x7e] - valid_extensions;
358 block[0x7e] = valid_extensions;
359 new = krealloc(block, (valid_extensions + 1) * EDID_LENGTH,
360 DRM_MEM_KMS, M_WAITOK);
364 DRM_DEBUG_KMS("got EDID from %s\n", drm_get_connector_name(connector));
368 DRM_ERROR("%s: EDID block %d invalid.\n",
369 drm_get_connector_name(connector), j);
372 drm_free(block, DRM_MEM_KMS);
377 * Probe DDC presence.
379 * \param adapter : i2c device adaptor
380 * \return 1 on success
383 drm_probe_ddc(device_t adapter)
387 return (drm_do_probe_ddc_edid(adapter, &out, 0, 1) == 0);
391 * drm_get_edid - get EDID data, if available
392 * @connector: connector we're probing
393 * @adapter: i2c adapter to use for DDC
395 * Poke the given i2c channel to grab EDID data if possible. If found,
396 * attach it to the connector.
398 * Return edid data or NULL if we couldn't find any.
400 struct edid *drm_get_edid(struct drm_connector *connector,
403 struct edid *edid = NULL;
405 if (drm_probe_ddc(adapter))
406 edid = (struct edid *)drm_do_get_edid(connector, adapter);
408 connector->display_info.raw_edid = (char *)edid;
414 /*** EDID parsing ***/
417 * edid_vendor - match a string against EDID's obfuscated vendor field
418 * @edid: EDID to match
419 * @vendor: vendor string
421 * Returns true if @vendor is in @edid, false otherwise
423 static bool edid_vendor(struct edid *edid, char *vendor)
427 edid_vendor[0] = ((edid->mfg_id[0] & 0x7c) >> 2) + '@';
428 edid_vendor[1] = (((edid->mfg_id[0] & 0x3) << 3) |
429 ((edid->mfg_id[1] & 0xe0) >> 5)) + '@';
430 edid_vendor[2] = (edid->mfg_id[1] & 0x1f) + '@';
432 return !strncmp(edid_vendor, vendor, 3);
436 * edid_get_quirks - return quirk flags for a given EDID
437 * @edid: EDID to process
439 * This tells subsequent routines what fixes they need to apply.
441 static u32 edid_get_quirks(struct edid *edid)
443 struct edid_quirk *quirk;
446 for (i = 0; i < DRM_ARRAY_SIZE(edid_quirk_list); i++) {
447 quirk = &edid_quirk_list[i];
449 if (edid_vendor(edid, quirk->vendor) &&
450 (EDID_PRODUCT_ID(edid) == quirk->product_id))
451 return quirk->quirks;
457 #define MODE_SIZE(m) ((m)->hdisplay * (m)->vdisplay)
458 #define MODE_REFRESH_DIFF(m,r) (abs((m)->vrefresh - target_refresh))
461 * edid_fixup_preferred - set preferred modes based on quirk list
462 * @connector: has mode list to fix up
463 * @quirks: quirks list
465 * Walk the mode list for @connector, clearing the preferred status
466 * on existing modes and setting it anew for the right mode ala @quirks.
468 static void edid_fixup_preferred(struct drm_connector *connector,
471 struct drm_display_mode *t, *cur_mode, *preferred_mode;
472 int target_refresh = 0;
474 if (list_empty(&connector->probed_modes))
477 if (quirks & EDID_QUIRK_PREFER_LARGE_60)
479 if (quirks & EDID_QUIRK_PREFER_LARGE_75)
482 preferred_mode = list_first_entry(&connector->probed_modes,
483 struct drm_display_mode, head);
485 list_for_each_entry_safe(cur_mode, t, &connector->probed_modes, head) {
486 cur_mode->type &= ~DRM_MODE_TYPE_PREFERRED;
488 if (cur_mode == preferred_mode)
491 /* Largest mode is preferred */
492 if (MODE_SIZE(cur_mode) > MODE_SIZE(preferred_mode))
493 preferred_mode = cur_mode;
495 /* At a given size, try to get closest to target refresh */
496 if ((MODE_SIZE(cur_mode) == MODE_SIZE(preferred_mode)) &&
497 MODE_REFRESH_DIFF(cur_mode, target_refresh) <
498 MODE_REFRESH_DIFF(preferred_mode, target_refresh)) {
499 preferred_mode = cur_mode;
503 preferred_mode->type |= DRM_MODE_TYPE_PREFERRED;
506 struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev,
507 int hsize, int vsize, int fresh)
509 struct drm_display_mode *mode = NULL;
512 for (i = 0; i < drm_num_dmt_modes; i++) {
513 struct drm_display_mode *ptr = &drm_dmt_modes[i];
514 if (hsize == ptr->hdisplay &&
515 vsize == ptr->vdisplay &&
516 fresh == drm_mode_vrefresh(ptr)) {
517 /* get the expected default mode */
518 mode = drm_mode_duplicate(dev, ptr);
525 typedef void detailed_cb(struct detailed_timing *timing, void *closure);
528 cea_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure)
532 u8 *det_base = ext + d;
535 for (i = 0; i < n; i++)
536 cb((struct detailed_timing *)(det_base + 18 * i), closure);
540 vtb_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure)
542 unsigned int i, n = min((int)ext[0x02], 6);
543 u8 *det_base = ext + 5;
546 return; /* unknown version */
548 for (i = 0; i < n; i++)
549 cb((struct detailed_timing *)(det_base + 18 * i), closure);
553 drm_for_each_detailed_block(u8 *raw_edid, detailed_cb *cb, void *closure)
556 struct edid *edid = (struct edid *)raw_edid;
561 for (i = 0; i < EDID_DETAILED_TIMINGS; i++)
562 cb(&(edid->detailed_timings[i]), closure);
564 for (i = 1; i <= raw_edid[0x7e]; i++) {
565 u8 *ext = raw_edid + (i * EDID_LENGTH);
568 cea_for_each_detailed_block(ext, cb, closure);
571 vtb_for_each_detailed_block(ext, cb, closure);
580 is_rb(struct detailed_timing *t, void *data)
583 if (r[3] == EDID_DETAIL_MONITOR_RANGE)
585 *(bool *)data = true;
588 /* EDID 1.4 defines this explicitly. For EDID 1.3, we guess, badly. */
590 drm_monitor_supports_rb(struct edid *edid)
592 if (edid->revision >= 4) {
594 drm_for_each_detailed_block((u8 *)edid, is_rb, &ret);
598 return ((edid->input & DRM_EDID_INPUT_DIGITAL) != 0);
602 find_gtf2(struct detailed_timing *t, void *data)
605 if (r[3] == EDID_DETAIL_MONITOR_RANGE && r[10] == 0x02)
609 /* Secondary GTF curve kicks in above some break frequency */
611 drm_gtf2_hbreak(struct edid *edid)
614 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
615 return r ? (r[12] * 2) : 0;
619 drm_gtf2_2c(struct edid *edid)
622 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
623 return r ? r[13] : 0;
627 drm_gtf2_m(struct edid *edid)
630 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
631 return r ? (r[15] << 8) + r[14] : 0;
635 drm_gtf2_k(struct edid *edid)
638 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
639 return r ? r[16] : 0;
643 drm_gtf2_2j(struct edid *edid)
646 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
647 return r ? r[17] : 0;
651 * standard_timing_level - get std. timing level(CVT/GTF/DMT)
652 * @edid: EDID block to scan
654 static int standard_timing_level(struct edid *edid)
656 if (edid->revision >= 2) {
657 if (edid->revision >= 4 && (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF))
659 if (drm_gtf2_hbreak(edid))
667 * 0 is reserved. The spec says 0x01 fill for unused timings. Some old
668 * monitors fill with ascii space (0x20) instead.
671 bad_std_timing(u8 a, u8 b)
673 return (a == 0x00 && b == 0x00) ||
674 (a == 0x01 && b == 0x01) ||
675 (a == 0x20 && b == 0x20);
679 * drm_mode_std - convert standard mode info (width, height, refresh) into mode
680 * @t: standard timing params
681 * @timing_level: standard timing level
683 * Take the standard timing params (in this case width, aspect, and refresh)
684 * and convert them into a real mode using CVT/GTF/DMT.
686 static struct drm_display_mode *
687 drm_mode_std(struct drm_connector *connector, struct edid *edid,
688 struct std_timing *t, int revision)
690 struct drm_device *dev = connector->dev;
691 struct drm_display_mode *m, *mode = NULL;
694 unsigned aspect_ratio = (t->vfreq_aspect & EDID_TIMING_ASPECT_MASK)
695 >> EDID_TIMING_ASPECT_SHIFT;
696 unsigned vfreq = (t->vfreq_aspect & EDID_TIMING_VFREQ_MASK)
697 >> EDID_TIMING_VFREQ_SHIFT;
698 int timing_level = standard_timing_level(edid);
700 if (bad_std_timing(t->hsize, t->vfreq_aspect))
703 /* According to the EDID spec, the hdisplay = hsize * 8 + 248 */
704 hsize = t->hsize * 8 + 248;
705 /* vrefresh_rate = vfreq + 60 */
706 vrefresh_rate = vfreq + 60;
707 /* the vdisplay is calculated based on the aspect ratio */
708 if (aspect_ratio == 0) {
712 vsize = (hsize * 10) / 16;
713 } else if (aspect_ratio == 1)
714 vsize = (hsize * 3) / 4;
715 else if (aspect_ratio == 2)
716 vsize = (hsize * 4) / 5;
718 vsize = (hsize * 9) / 16;
720 /* HDTV hack, part 1 */
721 if (vrefresh_rate == 60 &&
722 ((hsize == 1360 && vsize == 765) ||
723 (hsize == 1368 && vsize == 769))) {
729 * If this connector already has a mode for this size and refresh
730 * rate (because it came from detailed or CVT info), use that
731 * instead. This way we don't have to guess at interlace or
734 list_for_each_entry(m, &connector->probed_modes, head)
735 if (m->hdisplay == hsize && m->vdisplay == vsize &&
736 drm_mode_vrefresh(m) == vrefresh_rate)
739 /* HDTV hack, part 2 */
740 if (hsize == 1366 && vsize == 768 && vrefresh_rate == 60) {
741 mode = drm_cvt_mode(dev, 1366, 768, vrefresh_rate, 0, 0,
743 mode->hdisplay = 1366;
744 mode->hsync_start = mode->hsync_start - 1;
745 mode->hsync_end = mode->hsync_end - 1;
749 /* check whether it can be found in default mode table */
750 mode = drm_mode_find_dmt(dev, hsize, vsize, vrefresh_rate);
754 switch (timing_level) {
758 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
762 * This is potentially wrong if there's ever a monitor with
763 * more than one ranges section, each claiming a different
764 * secondary GTF curve. Please don't do that.
766 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
767 if (drm_mode_hsync(mode) > drm_gtf2_hbreak(edid)) {
768 drm_free(mode, DRM_MEM_KMS);
769 mode = drm_gtf_mode_complex(dev, hsize, vsize,
778 mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0,
786 * EDID is delightfully ambiguous about how interlaced modes are to be
787 * encoded. Our internal representation is of frame height, but some
788 * HDTV detailed timings are encoded as field height.
790 * The format list here is from CEA, in frame size. Technically we
791 * should be checking refresh rate too. Whatever.
794 drm_mode_do_interlace_quirk(struct drm_display_mode *mode,
795 struct detailed_pixel_timing *pt)
798 static const struct {
800 } cea_interlaced[] = {
810 if (!(pt->misc & DRM_EDID_PT_INTERLACED))
813 for (i = 0; i < DRM_ARRAY_SIZE(cea_interlaced); i++) {
814 if ((mode->hdisplay == cea_interlaced[i].w) &&
815 (mode->vdisplay == cea_interlaced[i].h / 2)) {
817 mode->vsync_start *= 2;
818 mode->vsync_end *= 2;
824 mode->flags |= DRM_MODE_FLAG_INTERLACE;
828 * drm_mode_detailed - create a new mode from an EDID detailed timing section
829 * @dev: DRM device (needed to create new mode)
831 * @timing: EDID detailed timing info
832 * @quirks: quirks to apply
834 * An EDID detailed timing block contains enough info for us to create and
835 * return a new struct drm_display_mode.
837 static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev,
839 struct detailed_timing *timing,
842 struct drm_display_mode *mode;
843 struct detailed_pixel_timing *pt = &timing->data.pixel_data;
844 unsigned hactive = (pt->hactive_hblank_hi & 0xf0) << 4 | pt->hactive_lo;
845 unsigned vactive = (pt->vactive_vblank_hi & 0xf0) << 4 | pt->vactive_lo;
846 unsigned hblank = (pt->hactive_hblank_hi & 0xf) << 8 | pt->hblank_lo;
847 unsigned vblank = (pt->vactive_vblank_hi & 0xf) << 8 | pt->vblank_lo;
848 unsigned hsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc0) << 2 | pt->hsync_offset_lo;
849 unsigned hsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x30) << 4 | pt->hsync_pulse_width_lo;
850 unsigned vsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc) >> 2 | pt->vsync_offset_pulse_width_lo >> 4;
851 unsigned vsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x3) << 4 | (pt->vsync_offset_pulse_width_lo & 0xf);
853 /* ignore tiny modes */
854 if (hactive < 64 || vactive < 64)
857 if (pt->misc & DRM_EDID_PT_STEREO) {
858 kprintf("stereo mode not supported\n");
861 if (!(pt->misc & DRM_EDID_PT_SEPARATE_SYNC)) {
862 kprintf("composite sync not supported\n");
865 /* it is incorrect if hsync/vsync width is zero */
866 if (!hsync_pulse_width || !vsync_pulse_width) {
867 DRM_DEBUG_KMS("Incorrect Detailed timing. "
868 "Wrong Hsync/Vsync pulse width\n");
871 mode = drm_mode_create(dev);
875 mode->type = DRM_MODE_TYPE_DRIVER;
877 if (quirks & EDID_QUIRK_135_CLOCK_TOO_HIGH)
878 timing->pixel_clock = htole16(1088);
880 mode->clock = le16toh(timing->pixel_clock) * 10;
882 mode->hdisplay = hactive;
883 mode->hsync_start = mode->hdisplay + hsync_offset;
884 mode->hsync_end = mode->hsync_start + hsync_pulse_width;
885 mode->htotal = mode->hdisplay + hblank;
887 mode->vdisplay = vactive;
888 mode->vsync_start = mode->vdisplay + vsync_offset;
889 mode->vsync_end = mode->vsync_start + vsync_pulse_width;
890 mode->vtotal = mode->vdisplay + vblank;
892 /* Some EDIDs have bogus h/vtotal values */
893 if (mode->hsync_end > mode->htotal)
894 mode->htotal = mode->hsync_end + 1;
895 if (mode->vsync_end > mode->vtotal)
896 mode->vtotal = mode->vsync_end + 1;
898 drm_mode_do_interlace_quirk(mode, pt);
900 drm_mode_set_name(mode);
902 if (quirks & EDID_QUIRK_DETAILED_SYNC_PP) {
903 pt->misc |= DRM_EDID_PT_HSYNC_POSITIVE | DRM_EDID_PT_VSYNC_POSITIVE;
906 mode->flags |= (pt->misc & DRM_EDID_PT_HSYNC_POSITIVE) ?
907 DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC;
908 mode->flags |= (pt->misc & DRM_EDID_PT_VSYNC_POSITIVE) ?
909 DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC;
911 mode->width_mm = pt->width_mm_lo | (pt->width_height_mm_hi & 0xf0) << 4;
912 mode->height_mm = pt->height_mm_lo | (pt->width_height_mm_hi & 0xf) << 8;
914 if (quirks & EDID_QUIRK_DETAILED_IN_CM) {
915 mode->width_mm *= 10;
916 mode->height_mm *= 10;
919 if (quirks & EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE) {
920 mode->width_mm = edid->width_cm * 10;
921 mode->height_mm = edid->height_cm * 10;
928 mode_is_rb(const struct drm_display_mode *mode)
930 return (mode->htotal - mode->hdisplay == 160) &&
931 (mode->hsync_end - mode->hdisplay == 80) &&
932 (mode->hsync_end - mode->hsync_start == 32) &&
933 (mode->vsync_start - mode->vdisplay == 3);
937 mode_in_hsync_range(struct drm_display_mode *mode,
938 struct edid *edid, u8 *t)
940 int hsync, hmin, hmax;
943 if (edid->revision >= 4)
944 hmin += ((t[4] & 0x04) ? 255 : 0);
946 if (edid->revision >= 4)
947 hmax += ((t[4] & 0x08) ? 255 : 0);
948 hsync = drm_mode_hsync(mode);
950 return (hsync <= hmax && hsync >= hmin);
954 mode_in_vsync_range(struct drm_display_mode *mode,
955 struct edid *edid, u8 *t)
957 int vsync, vmin, vmax;
960 if (edid->revision >= 4)
961 vmin += ((t[4] & 0x01) ? 255 : 0);
963 if (edid->revision >= 4)
964 vmax += ((t[4] & 0x02) ? 255 : 0);
965 vsync = drm_mode_vrefresh(mode);
967 return (vsync <= vmax && vsync >= vmin);
971 range_pixel_clock(struct edid *edid, u8 *t)
974 if (t[9] == 0 || t[9] == 255)
977 /* 1.4 with CVT support gives us real precision, yay */
978 if (edid->revision >= 4 && t[10] == 0x04)
979 return (t[9] * 10000) - ((t[12] >> 2) * 250);
981 /* 1.3 is pathetic, so fuzz up a bit */
982 return t[9] * 10000 + 5001;
986 mode_in_range(struct drm_display_mode *mode, struct edid *edid,
987 struct detailed_timing *timing)
990 u8 *t = (u8 *)timing;
992 if (!mode_in_hsync_range(mode, edid, t))
995 if (!mode_in_vsync_range(mode, edid, t))
998 if ((max_clock = range_pixel_clock(edid, t)))
999 if (mode->clock > max_clock)
1002 /* 1.4 max horizontal check */
1003 if (edid->revision >= 4 && t[10] == 0x04)
1004 if (t[13] && mode->hdisplay > 8 * (t[13] + (256 * (t[12]&0x3))))
1007 if (mode_is_rb(mode) && !drm_monitor_supports_rb(edid))
1014 * XXX If drm_dmt_modes ever regrows the CVT-R modes (and it will) this will
1015 * need to account for them.
1018 drm_gtf_modes_for_range(struct drm_connector *connector, struct edid *edid,
1019 struct detailed_timing *timing)
1022 struct drm_display_mode *newmode;
1023 struct drm_device *dev = connector->dev;
1025 for (i = 0; i < drm_num_dmt_modes; i++) {
1026 if (mode_in_range(drm_dmt_modes + i, edid, timing)) {
1027 newmode = drm_mode_duplicate(dev, &drm_dmt_modes[i]);
1029 drm_mode_probed_add(connector, newmode);
1039 do_inferred_modes(struct detailed_timing *timing, void *c)
1041 struct detailed_mode_closure *closure = c;
1042 struct detailed_non_pixel *data = &timing->data.other_data;
1043 int gtf = (closure->edid->features & DRM_EDID_FEATURE_DEFAULT_GTF);
1045 if (gtf && data->type == EDID_DETAIL_MONITOR_RANGE)
1046 closure->modes += drm_gtf_modes_for_range(closure->connector,
1052 add_inferred_modes(struct drm_connector *connector, struct edid *edid)
1054 struct detailed_mode_closure closure = {
1055 connector, edid, 0, 0, 0
1058 if (version_greater(edid, 1, 0))
1059 drm_for_each_detailed_block((u8 *)edid, do_inferred_modes,
1062 return closure.modes;
1066 drm_est3_modes(struct drm_connector *connector, struct detailed_timing *timing)
1068 int i, j, m, modes = 0;
1069 struct drm_display_mode *mode;
1070 u8 *est = ((u8 *)timing) + 5;
1072 for (i = 0; i < 6; i++) {
1073 for (j = 7; j > 0; j--) {
1074 m = (i * 8) + (7 - j);
1075 if (m >= DRM_ARRAY_SIZE(est3_modes))
1077 if (est[i] & (1 << j)) {
1078 mode = drm_mode_find_dmt(connector->dev,
1082 /*, est3_modes[m].rb */);
1084 drm_mode_probed_add(connector, mode);
1095 do_established_modes(struct detailed_timing *timing, void *c)
1097 struct detailed_mode_closure *closure = c;
1098 struct detailed_non_pixel *data = &timing->data.other_data;
1100 if (data->type == EDID_DETAIL_EST_TIMINGS)
1101 closure->modes += drm_est3_modes(closure->connector, timing);
1105 * add_established_modes - get est. modes from EDID and add them
1106 * @edid: EDID block to scan
1108 * Each EDID block contains a bitmap of the supported "established modes" list
1109 * (defined above). Tease them out and add them to the global modes list.
1112 add_established_modes(struct drm_connector *connector, struct edid *edid)
1114 struct drm_device *dev = connector->dev;
1115 unsigned long est_bits = edid->established_timings.t1 |
1116 (edid->established_timings.t2 << 8) |
1117 ((edid->established_timings.mfg_rsvd & 0x80) << 9);
1119 struct detailed_mode_closure closure = {
1120 connector, edid, 0, 0, 0
1123 for (i = 0; i <= EDID_EST_TIMINGS; i++) {
1124 if (est_bits & (1<<i)) {
1125 struct drm_display_mode *newmode;
1126 newmode = drm_mode_duplicate(dev, &edid_est_modes[i]);
1128 drm_mode_probed_add(connector, newmode);
1134 if (version_greater(edid, 1, 0))
1135 drm_for_each_detailed_block((u8 *)edid,
1136 do_established_modes, &closure);
1138 return modes + closure.modes;
1142 do_standard_modes(struct detailed_timing *timing, void *c)
1144 struct detailed_mode_closure *closure = c;
1145 struct detailed_non_pixel *data = &timing->data.other_data;
1146 struct drm_connector *connector = closure->connector;
1147 struct edid *edid = closure->edid;
1149 if (data->type == EDID_DETAIL_STD_MODES) {
1151 for (i = 0; i < 6; i++) {
1152 struct std_timing *std;
1153 struct drm_display_mode *newmode;
1155 std = &data->data.timings[i];
1156 newmode = drm_mode_std(connector, edid, std,
1159 drm_mode_probed_add(connector, newmode);
1167 * add_standard_modes - get std. modes from EDID and add them
1168 * @edid: EDID block to scan
1170 * Standard modes can be calculated using the appropriate standard (DMT,
1171 * GTF or CVT. Grab them from @edid and add them to the list.
1174 add_standard_modes(struct drm_connector *connector, struct edid *edid)
1177 struct detailed_mode_closure closure = {
1178 connector, edid, 0, 0, 0
1181 for (i = 0; i < EDID_STD_TIMINGS; i++) {
1182 struct drm_display_mode *newmode;
1184 newmode = drm_mode_std(connector, edid,
1185 &edid->standard_timings[i],
1188 drm_mode_probed_add(connector, newmode);
1193 if (version_greater(edid, 1, 0))
1194 drm_for_each_detailed_block((u8 *)edid, do_standard_modes,
1197 /* XXX should also look for standard codes in VTB blocks */
1199 return modes + closure.modes;
1202 static int drm_cvt_modes(struct drm_connector *connector,
1203 struct detailed_timing *timing)
1205 int i, j, modes = 0;
1206 struct drm_display_mode *newmode;
1207 struct drm_device *dev = connector->dev;
1208 struct cvt_timing *cvt;
1209 const int rates[] = { 60, 85, 75, 60, 50 };
1210 const u8 empty[3] = { 0, 0, 0 };
1212 for (i = 0; i < 4; i++) {
1213 int width = 0, height;
1214 cvt = &(timing->data.other_data.data.cvt[i]);
1216 if (!memcmp(cvt->code, empty, 3))
1219 height = (cvt->code[0] + ((cvt->code[1] & 0xf0) << 4) + 1) * 2;
1220 switch (cvt->code[1] & 0x0c) {
1222 width = height * 4 / 3;
1225 width = height * 16 / 9;
1228 width = height * 16 / 10;
1231 width = height * 15 / 9;
1235 for (j = 1; j < 5; j++) {
1236 if (cvt->code[2] & (1 << j)) {
1237 newmode = drm_cvt_mode(dev, width, height,
1241 drm_mode_probed_add(connector, newmode);
1252 do_cvt_mode(struct detailed_timing *timing, void *c)
1254 struct detailed_mode_closure *closure = c;
1255 struct detailed_non_pixel *data = &timing->data.other_data;
1257 if (data->type == EDID_DETAIL_CVT_3BYTE)
1258 closure->modes += drm_cvt_modes(closure->connector, timing);
1262 add_cvt_modes(struct drm_connector *connector, struct edid *edid)
1264 struct detailed_mode_closure closure = {
1265 connector, edid, 0, 0, 0
1268 if (version_greater(edid, 1, 2))
1269 drm_for_each_detailed_block((u8 *)edid, do_cvt_mode, &closure);
1271 /* XXX should also look for CVT codes in VTB blocks */
1273 return closure.modes;
1277 do_detailed_mode(struct detailed_timing *timing, void *c)
1279 struct detailed_mode_closure *closure = c;
1280 struct drm_display_mode *newmode;
1282 if (timing->pixel_clock) {
1283 newmode = drm_mode_detailed(closure->connector->dev,
1284 closure->edid, timing,
1289 if (closure->preferred)
1290 newmode->type |= DRM_MODE_TYPE_PREFERRED;
1292 drm_mode_probed_add(closure->connector, newmode);
1294 closure->preferred = 0;
1299 * add_detailed_modes - Add modes from detailed timings
1300 * @connector: attached connector
1301 * @edid: EDID block to scan
1302 * @quirks: quirks to apply
1305 add_detailed_modes(struct drm_connector *connector, struct edid *edid,
1308 struct detailed_mode_closure closure = {
1316 if (closure.preferred && !version_greater(edid, 1, 3))
1318 (edid->features & DRM_EDID_FEATURE_PREFERRED_TIMING);
1320 drm_for_each_detailed_block((u8 *)edid, do_detailed_mode, &closure);
1322 return closure.modes;
1325 #define HDMI_IDENTIFIER 0x000C03
1326 #define AUDIO_BLOCK 0x01
1327 #define VENDOR_BLOCK 0x03
1328 #define SPEAKER_BLOCK 0x04
1329 #define EDID_BASIC_AUDIO (1 << 6)
1332 * Search EDID for CEA extension block.
1334 u8 *drm_find_cea_extension(struct edid *edid)
1336 u8 *edid_ext = NULL;
1339 /* No EDID or EDID extensions */
1340 if (edid == NULL || edid->extensions == 0)
1343 /* Find CEA extension */
1344 for (i = 0; i < edid->extensions; i++) {
1345 edid_ext = (u8 *)edid + EDID_LENGTH * (i + 1);
1346 if (edid_ext[0] == CEA_EXT)
1350 if (i == edid->extensions)
1357 parse_hdmi_vsdb(struct drm_connector *connector, uint8_t *db)
1359 connector->eld[5] |= (db[6] >> 7) << 1; /* Supports_AI */
1361 connector->dvi_dual = db[6] & 1;
1362 connector->max_tmds_clock = db[7] * 5;
1364 connector->latency_present[0] = db[8] >> 7;
1365 connector->latency_present[1] = (db[8] >> 6) & 1;
1366 connector->video_latency[0] = db[9];
1367 connector->audio_latency[0] = db[10];
1368 connector->video_latency[1] = db[11];
1369 connector->audio_latency[1] = db[12];
1371 DRM_DEBUG_KMS("HDMI: DVI dual %d, "
1372 "max TMDS clock %d, "
1373 "latency present %d %d, "
1374 "video latency %d %d, "
1375 "audio latency %d %d\n",
1376 connector->dvi_dual,
1377 connector->max_tmds_clock,
1378 (int) connector->latency_present[0],
1379 (int) connector->latency_present[1],
1380 connector->video_latency[0],
1381 connector->video_latency[1],
1382 connector->audio_latency[0],
1383 connector->audio_latency[1]);
1387 monitor_name(struct detailed_timing *t, void *data)
1389 if (t->data.other_data.type == EDID_DETAIL_MONITOR_NAME)
1390 *(u8 **)data = t->data.other_data.data.str.str;
1394 * drm_edid_to_eld - build ELD from EDID
1395 * @connector: connector corresponding to the HDMI/DP sink
1396 * @edid: EDID to parse
1398 * Fill the ELD (EDID-Like Data) buffer for passing to the audio driver.
1399 * Some ELD fields are left to the graphics driver caller:
1404 void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
1406 uint8_t *eld = connector->eld;
1414 memset(eld, 0, sizeof(connector->eld));
1416 cea = drm_find_cea_extension(edid);
1418 DRM_DEBUG_KMS("ELD: no CEA Extension found\n");
1423 drm_for_each_detailed_block((u8 *)edid, monitor_name, &name);
1424 for (mnl = 0; name && mnl < 13; mnl++) {
1425 if (name[mnl] == 0x0a)
1427 eld[20 + mnl] = name[mnl];
1429 eld[4] = (cea[1] << 5) | mnl;
1430 DRM_DEBUG_KMS("ELD monitor %s\n", eld + 20);
1432 eld[0] = 2 << 3; /* ELD version: 2 */
1434 eld[16] = edid->mfg_id[0];
1435 eld[17] = edid->mfg_id[1];
1436 eld[18] = edid->prod_code[0];
1437 eld[19] = edid->prod_code[1];
1439 for (db = cea + 4; db < cea + cea[2]; db += dbl + 1) {
1442 switch ((db[0] & 0xe0) >> 5) {
1443 case AUDIO_BLOCK: /* Audio Data Block, contains SADs */
1444 sad_count = dbl / 3;
1445 memcpy(eld + 20 + mnl, &db[1], dbl);
1447 case SPEAKER_BLOCK: /* Speaker Allocation Data Block */
1451 /* HDMI Vendor-Specific Data Block */
1452 if (db[1] == 0x03 && db[2] == 0x0c && db[3] == 0)
1453 parse_hdmi_vsdb(connector, db);
1459 eld[5] |= sad_count << 4;
1460 eld[2] = (20 + mnl + sad_count * 3 + 3) / 4;
1462 DRM_DEBUG_KMS("ELD size %d, SAD count %d\n", (int)eld[2], sad_count);
1466 * drm_av_sync_delay - HDMI/DP sink audio-video sync delay in millisecond
1467 * @connector: connector associated with the HDMI/DP sink
1468 * @mode: the display mode
1470 int drm_av_sync_delay(struct drm_connector *connector,
1471 struct drm_display_mode *mode)
1473 int i = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
1476 if (!connector->latency_present[0])
1478 if (!connector->latency_present[1])
1481 a = connector->audio_latency[i];
1482 v = connector->video_latency[i];
1485 * HDMI/DP sink doesn't support audio or video?
1487 if (a == 255 || v == 255)
1491 * Convert raw EDID values to millisecond.
1492 * Treat unknown latency as 0ms.
1495 a = min(2 * (a - 1), 500);
1497 v = min(2 * (v - 1), 500);
1499 return max(v - a, 0);
1503 * drm_select_eld - select one ELD from multiple HDMI/DP sinks
1504 * @encoder: the encoder just changed display mode
1505 * @mode: the adjusted display mode
1507 * It's possible for one encoder to be associated with multiple HDMI/DP sinks.
1508 * The policy is now hard coded to simply use the first HDMI/DP sink's ELD.
1510 struct drm_connector *drm_select_eld(struct drm_encoder *encoder,
1511 struct drm_display_mode *mode)
1513 struct drm_connector *connector;
1514 struct drm_device *dev = encoder->dev;
1516 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
1517 if (connector->encoder == encoder && connector->eld[0])
1524 * drm_detect_hdmi_monitor - detect whether monitor is hdmi.
1525 * @edid: monitor EDID information
1527 * Parse the CEA extension according to CEA-861-B.
1528 * Return true if HDMI, false if not or unknown.
1530 bool drm_detect_hdmi_monitor(struct edid *edid)
1534 int start_offset, end_offset;
1535 bool is_hdmi = false;
1537 edid_ext = drm_find_cea_extension(edid);
1541 /* Data block offset in CEA extension block */
1543 end_offset = edid_ext[2];
1546 * Because HDMI identifier is in Vendor Specific Block,
1547 * search it from all data blocks of CEA extension.
1549 for (i = start_offset; i < end_offset;
1550 /* Increased by data block len */
1551 i += ((edid_ext[i] & 0x1f) + 1)) {
1552 /* Find vendor specific block */
1553 if ((edid_ext[i] >> 5) == VENDOR_BLOCK) {
1554 hdmi_id = edid_ext[i + 1] | (edid_ext[i + 2] << 8) |
1555 edid_ext[i + 3] << 16;
1556 /* Find HDMI identifier */
1557 if (hdmi_id == HDMI_IDENTIFIER)
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);
1614 * drm_add_display_info - pull display info out if present
1616 * @info: display info (attached to connector)
1618 * Grab any available display info and stuff it into the drm_display_info
1619 * structure that's part of the connector. Useful for tracking bpp and
1622 static void drm_add_display_info(struct edid *edid,
1623 struct drm_display_info *info)
1627 info->width_mm = edid->width_cm * 10;
1628 info->height_mm = edid->height_cm * 10;
1630 /* driver figures it out in this case */
1632 info->color_formats = 0;
1634 /* Only defined for 1.4 with digital displays */
1635 if (edid->revision < 4)
1638 if (!(edid->input & DRM_EDID_INPUT_DIGITAL))
1641 switch (edid->input & DRM_EDID_DIGITAL_DEPTH_MASK) {
1642 case DRM_EDID_DIGITAL_DEPTH_6:
1645 case DRM_EDID_DIGITAL_DEPTH_8:
1648 case DRM_EDID_DIGITAL_DEPTH_10:
1651 case DRM_EDID_DIGITAL_DEPTH_12:
1654 case DRM_EDID_DIGITAL_DEPTH_14:
1657 case DRM_EDID_DIGITAL_DEPTH_16:
1660 case DRM_EDID_DIGITAL_DEPTH_UNDEF:
1666 info->color_formats = DRM_COLOR_FORMAT_RGB444;
1667 if (info->color_formats & DRM_EDID_FEATURE_RGB_YCRCB444)
1668 info->color_formats = DRM_COLOR_FORMAT_YCRCB444;
1669 if (info->color_formats & DRM_EDID_FEATURE_RGB_YCRCB422)
1670 info->color_formats = DRM_COLOR_FORMAT_YCRCB422;
1672 /* Get data from CEA blocks if present */
1673 edid_ext = drm_find_cea_extension(edid);
1677 info->cea_rev = edid_ext[1];
1681 * drm_add_edid_modes - add modes from EDID data, if available
1682 * @connector: connector we're probing
1685 * Add the specified modes to the connector's mode list.
1687 * Return number of modes added or 0 if we couldn't find any.
1689 int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid)
1697 if (!drm_edid_is_valid(edid)) {
1698 device_printf(connector->dev->device, "%s: EDID invalid.\n",
1699 drm_get_connector_name(connector));
1703 quirks = edid_get_quirks(edid);
1706 * EDID spec says modes should be preferred in this order:
1707 * - preferred detailed mode
1708 * - other detailed modes from base block
1709 * - detailed modes from extension blocks
1710 * - CVT 3-byte code modes
1711 * - standard timing codes
1712 * - established timing codes
1713 * - modes inferred from GTF or CVT range information
1715 * We get this pretty much right.
1717 * XXX order for additional mode types in extension blocks?
1719 num_modes += add_detailed_modes(connector, edid, quirks);
1720 num_modes += add_cvt_modes(connector, edid);
1721 num_modes += add_standard_modes(connector, edid);
1722 num_modes += add_established_modes(connector, edid);
1723 num_modes += add_inferred_modes(connector, edid);
1725 if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75))
1726 edid_fixup_preferred(connector, quirks);
1728 drm_add_display_info(edid, &connector->display_info);
1734 * drm_add_modes_noedid - add modes for the connectors without EDID
1735 * @connector: connector we're probing
1736 * @hdisplay: the horizontal display limit
1737 * @vdisplay: the vertical display limit
1739 * Add the specified modes to the connector's mode list. Only when the
1740 * hdisplay/vdisplay is not beyond the given limit, it will be added.
1742 * Return number of modes added or 0 if we couldn't find any.
1744 int drm_add_modes_noedid(struct drm_connector *connector,
1745 int hdisplay, int vdisplay)
1747 int i, count, num_modes = 0;
1748 struct drm_display_mode *mode;
1749 struct drm_device *dev = connector->dev;
1751 count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
1757 for (i = 0; i < count; i++) {
1758 struct drm_display_mode *ptr = &drm_dmt_modes[i];
1759 if (hdisplay && vdisplay) {
1761 * Only when two are valid, they will be used to check
1762 * whether the mode should be added to the mode list of
1765 if (ptr->hdisplay > hdisplay ||
1766 ptr->vdisplay > vdisplay)
1769 if (drm_mode_vrefresh(ptr) > 61)
1771 mode = drm_mode_duplicate(dev, ptr);
1773 drm_mode_probed_add(connector, mode);