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);
270 DRM_DEBUG_KMS("drm: skipping non-existent adapter %s\n",
274 } while (ret != 2 && --retries);
276 return ret == 2 ? 0 : -1;
279 static bool drm_edid_is_zero(u8 *in_edid, int length)
282 u32 *raw_edid = (u32 *)in_edid;
284 for (i = 0; i < length / 4; i++)
285 if (*(raw_edid + i) != 0)
291 drm_do_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter)
293 int i, j = 0, valid_extensions = 0;
296 if ((block = kmalloc(EDID_LENGTH, GFP_KERNEL)) == NULL)
299 /* base block fetch */
300 for (i = 0; i < 4; i++) {
301 if (drm_do_probe_ddc_edid(adapter, block, 0, EDID_LENGTH))
303 if (drm_edid_block_valid(block))
305 if (i == 0 && drm_edid_is_zero(block, EDID_LENGTH)) {
306 connector->null_edid_counter++;
313 /* if there's no extensions, we're done */
314 if (block[0x7e] == 0)
317 new = krealloc(block, (block[0x7e] + 1) * EDID_LENGTH, GFP_KERNEL);
322 for (j = 1; j <= block[0x7e]; j++) {
323 for (i = 0; i < 4; i++) {
324 if (drm_do_probe_ddc_edid(adapter,
325 block + (valid_extensions + 1) * EDID_LENGTH,
328 if (drm_edid_block_valid(block + (valid_extensions + 1) * EDID_LENGTH)) {
334 dev_warn(connector->dev->dev,
335 "%s: Ignoring invalid EDID block %d.\n",
336 drm_get_connector_name(connector), j);
339 if (valid_extensions != block[0x7e]) {
340 block[EDID_LENGTH-1] += block[0x7e] - valid_extensions;
341 block[0x7e] = valid_extensions;
342 new = krealloc(block, (valid_extensions + 1) * EDID_LENGTH, GFP_KERNEL);
351 dev_warn(connector->dev->dev, "%s: EDID block %d invalid.\n",
352 drm_get_connector_name(connector), j);
360 * Probe DDC presence.
362 * \param adapter : i2c device adaptor
363 * \return 1 on success
366 drm_probe_ddc(struct i2c_adapter *adapter)
370 return (drm_do_probe_ddc_edid(adapter, &out, 0, 1) == 0);
374 * drm_get_edid - get EDID data, if available
375 * @connector: connector we're probing
376 * @adapter: i2c adapter to use for DDC
378 * Poke the given i2c channel to grab EDID data if possible. If found,
379 * attach it to the connector.
381 * Return edid data or NULL if we couldn't find any.
383 struct edid *drm_get_edid(struct drm_connector *connector,
384 struct i2c_adapter *adapter)
386 struct edid *edid = NULL;
388 if (drm_probe_ddc(adapter))
389 edid = (struct edid *)drm_do_get_edid(connector, adapter);
391 connector->display_info.raw_edid = (char *)edid;
396 EXPORT_SYMBOL(drm_get_edid);
398 /*** EDID parsing ***/
401 * edid_vendor - match a string against EDID's obfuscated vendor field
402 * @edid: EDID to match
403 * @vendor: vendor string
405 * Returns true if @vendor is in @edid, false otherwise
407 static bool edid_vendor(struct edid *edid, char *vendor)
411 edid_vendor[0] = ((edid->mfg_id[0] & 0x7c) >> 2) + '@';
412 edid_vendor[1] = (((edid->mfg_id[0] & 0x3) << 3) |
413 ((edid->mfg_id[1] & 0xe0) >> 5)) + '@';
414 edid_vendor[2] = (edid->mfg_id[1] & 0x1f) + '@';
416 return !strncmp(edid_vendor, vendor, 3);
420 * edid_get_quirks - return quirk flags for a given EDID
421 * @edid: EDID to process
423 * This tells subsequent routines what fixes they need to apply.
425 static u32 edid_get_quirks(struct edid *edid)
427 struct edid_quirk *quirk;
430 for (i = 0; i < ARRAY_SIZE(edid_quirk_list); i++) {
431 quirk = &edid_quirk_list[i];
433 if (edid_vendor(edid, quirk->vendor) &&
434 (EDID_PRODUCT_ID(edid) == quirk->product_id))
435 return quirk->quirks;
441 #define MODE_SIZE(m) ((m)->hdisplay * (m)->vdisplay)
442 #define MODE_REFRESH_DIFF(m,r) (abs((m)->vrefresh - target_refresh))
445 * edid_fixup_preferred - set preferred modes based on quirk list
446 * @connector: has mode list to fix up
447 * @quirks: quirks list
449 * Walk the mode list for @connector, clearing the preferred status
450 * on existing modes and setting it anew for the right mode ala @quirks.
452 static void edid_fixup_preferred(struct drm_connector *connector,
455 struct drm_display_mode *t, *cur_mode, *preferred_mode;
456 int target_refresh = 0;
458 if (list_empty(&connector->probed_modes))
461 if (quirks & EDID_QUIRK_PREFER_LARGE_60)
463 if (quirks & EDID_QUIRK_PREFER_LARGE_75)
466 preferred_mode = list_first_entry(&connector->probed_modes,
467 struct drm_display_mode, head);
469 list_for_each_entry_safe(cur_mode, t, &connector->probed_modes, head) {
470 cur_mode->type &= ~DRM_MODE_TYPE_PREFERRED;
472 if (cur_mode == preferred_mode)
475 /* Largest mode is preferred */
476 if (MODE_SIZE(cur_mode) > MODE_SIZE(preferred_mode))
477 preferred_mode = cur_mode;
479 /* At a given size, try to get closest to target refresh */
480 if ((MODE_SIZE(cur_mode) == MODE_SIZE(preferred_mode)) &&
481 MODE_REFRESH_DIFF(cur_mode, target_refresh) <
482 MODE_REFRESH_DIFF(preferred_mode, target_refresh)) {
483 preferred_mode = cur_mode;
487 preferred_mode->type |= DRM_MODE_TYPE_PREFERRED;
490 struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev,
491 int hsize, int vsize, int fresh)
493 struct drm_display_mode *mode = NULL;
496 for (i = 0; i < drm_num_dmt_modes; i++) {
497 const struct drm_display_mode *ptr = &drm_dmt_modes[i];
498 if (hsize == ptr->hdisplay &&
499 vsize == ptr->vdisplay &&
500 fresh == drm_mode_vrefresh(ptr)) {
501 /* get the expected default mode */
502 mode = drm_mode_duplicate(dev, ptr);
508 EXPORT_SYMBOL(drm_mode_find_dmt);
510 typedef void detailed_cb(struct detailed_timing *timing, void *closure);
513 cea_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure)
517 u8 *det_base = ext + d;
520 for (i = 0; i < n; i++)
521 cb((struct detailed_timing *)(det_base + 18 * i), closure);
525 vtb_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure)
527 unsigned int i, n = min((int)ext[0x02], 6);
528 u8 *det_base = ext + 5;
531 return; /* unknown version */
533 for (i = 0; i < n; i++)
534 cb((struct detailed_timing *)(det_base + 18 * i), closure);
538 drm_for_each_detailed_block(u8 *raw_edid, detailed_cb *cb, void *closure)
541 struct edid *edid = (struct edid *)raw_edid;
546 for (i = 0; i < EDID_DETAILED_TIMINGS; i++)
547 cb(&(edid->detailed_timings[i]), closure);
549 for (i = 1; i <= raw_edid[0x7e]; i++) {
550 u8 *ext = raw_edid + (i * EDID_LENGTH);
553 cea_for_each_detailed_block(ext, cb, closure);
556 vtb_for_each_detailed_block(ext, cb, closure);
565 is_rb(struct detailed_timing *t, void *data)
568 if (r[3] == EDID_DETAIL_MONITOR_RANGE)
570 *(bool *)data = true;
573 /* EDID 1.4 defines this explicitly. For EDID 1.3, we guess, badly. */
575 drm_monitor_supports_rb(struct edid *edid)
577 if (edid->revision >= 4) {
579 drm_for_each_detailed_block((u8 *)edid, is_rb, &ret);
583 return ((edid->input & DRM_EDID_INPUT_DIGITAL) != 0);
587 find_gtf2(struct detailed_timing *t, void *data)
590 if (r[3] == EDID_DETAIL_MONITOR_RANGE && r[10] == 0x02)
594 /* Secondary GTF curve kicks in above some break frequency */
596 drm_gtf2_hbreak(struct edid *edid)
599 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
600 return r ? (r[12] * 2) : 0;
604 drm_gtf2_2c(struct edid *edid)
607 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
608 return r ? r[13] : 0;
612 drm_gtf2_m(struct edid *edid)
615 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
616 return r ? (r[15] << 8) + r[14] : 0;
620 drm_gtf2_k(struct edid *edid)
623 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
624 return r ? r[16] : 0;
628 drm_gtf2_2j(struct edid *edid)
631 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
632 return r ? r[17] : 0;
636 * standard_timing_level - get std. timing level(CVT/GTF/DMT)
637 * @edid: EDID block to scan
639 static int standard_timing_level(struct edid *edid)
641 if (edid->revision >= 2) {
642 if (edid->revision >= 4 && (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF))
644 if (drm_gtf2_hbreak(edid))
652 * 0 is reserved. The spec says 0x01 fill for unused timings. Some old
653 * monitors fill with ascii space (0x20) instead.
656 bad_std_timing(u8 a, u8 b)
658 return (a == 0x00 && b == 0x00) ||
659 (a == 0x01 && b == 0x01) ||
660 (a == 0x20 && b == 0x20);
664 * drm_mode_std - convert standard mode info (width, height, refresh) into mode
665 * @t: standard timing params
666 * @timing_level: standard timing level
668 * Take the standard timing params (in this case width, aspect, and refresh)
669 * and convert them into a real mode using CVT/GTF/DMT.
671 static struct drm_display_mode *
672 drm_mode_std(struct drm_connector *connector, struct edid *edid,
673 struct std_timing *t, int revision)
675 struct drm_device *dev = connector->dev;
676 struct drm_display_mode *m, *mode = NULL;
679 unsigned aspect_ratio = (t->vfreq_aspect & EDID_TIMING_ASPECT_MASK)
680 >> EDID_TIMING_ASPECT_SHIFT;
681 unsigned vfreq = (t->vfreq_aspect & EDID_TIMING_VFREQ_MASK)
682 >> EDID_TIMING_VFREQ_SHIFT;
683 int timing_level = standard_timing_level(edid);
685 if (bad_std_timing(t->hsize, t->vfreq_aspect))
688 /* According to the EDID spec, the hdisplay = hsize * 8 + 248 */
689 hsize = t->hsize * 8 + 248;
690 /* vrefresh_rate = vfreq + 60 */
691 vrefresh_rate = vfreq + 60;
692 /* the vdisplay is calculated based on the aspect ratio */
693 if (aspect_ratio == 0) {
697 vsize = (hsize * 10) / 16;
698 } else if (aspect_ratio == 1)
699 vsize = (hsize * 3) / 4;
700 else if (aspect_ratio == 2)
701 vsize = (hsize * 4) / 5;
703 vsize = (hsize * 9) / 16;
705 /* HDTV hack, part 1 */
706 if (vrefresh_rate == 60 &&
707 ((hsize == 1360 && vsize == 765) ||
708 (hsize == 1368 && vsize == 769))) {
714 * If this connector already has a mode for this size and refresh
715 * rate (because it came from detailed or CVT info), use that
716 * instead. This way we don't have to guess at interlace or
719 list_for_each_entry(m, &connector->probed_modes, head)
720 if (m->hdisplay == hsize && m->vdisplay == vsize &&
721 drm_mode_vrefresh(m) == vrefresh_rate)
724 /* HDTV hack, part 2 */
725 if (hsize == 1366 && vsize == 768 && vrefresh_rate == 60) {
726 mode = drm_cvt_mode(dev, 1366, 768, vrefresh_rate, 0, 0,
728 mode->hdisplay = 1366;
729 mode->hsync_start = mode->hsync_start - 1;
730 mode->hsync_end = mode->hsync_end - 1;
734 /* check whether it can be found in default mode table */
735 mode = drm_mode_find_dmt(dev, hsize, vsize, vrefresh_rate);
739 switch (timing_level) {
743 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
747 * This is potentially wrong if there's ever a monitor with
748 * more than one ranges section, each claiming a different
749 * secondary GTF curve. Please don't do that.
751 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
752 if (drm_mode_hsync(mode) > drm_gtf2_hbreak(edid)) {
753 drm_mode_destroy(dev, mode);
754 mode = drm_gtf_mode_complex(dev, hsize, vsize,
763 mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0,
771 * EDID is delightfully ambiguous about how interlaced modes are to be
772 * encoded. Our internal representation is of frame height, but some
773 * HDTV detailed timings are encoded as field height.
775 * The format list here is from CEA, in frame size. Technically we
776 * should be checking refresh rate too. Whatever.
779 drm_mode_do_interlace_quirk(struct drm_display_mode *mode,
780 struct detailed_pixel_timing *pt)
783 static const struct {
785 } cea_interlaced[] = {
795 if (!(pt->misc & DRM_EDID_PT_INTERLACED))
798 for (i = 0; i < ARRAY_SIZE(cea_interlaced); i++) {
799 if ((mode->hdisplay == cea_interlaced[i].w) &&
800 (mode->vdisplay == cea_interlaced[i].h / 2)) {
802 mode->vsync_start *= 2;
803 mode->vsync_end *= 2;
809 mode->flags |= DRM_MODE_FLAG_INTERLACE;
813 * drm_mode_detailed - create a new mode from an EDID detailed timing section
814 * @dev: DRM device (needed to create new mode)
816 * @timing: EDID detailed timing info
817 * @quirks: quirks to apply
819 * An EDID detailed timing block contains enough info for us to create and
820 * return a new struct drm_display_mode.
822 static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev,
824 struct detailed_timing *timing,
827 struct drm_display_mode *mode;
828 struct detailed_pixel_timing *pt = &timing->data.pixel_data;
829 unsigned hactive = (pt->hactive_hblank_hi & 0xf0) << 4 | pt->hactive_lo;
830 unsigned vactive = (pt->vactive_vblank_hi & 0xf0) << 4 | pt->vactive_lo;
831 unsigned hblank = (pt->hactive_hblank_hi & 0xf) << 8 | pt->hblank_lo;
832 unsigned vblank = (pt->vactive_vblank_hi & 0xf) << 8 | pt->vblank_lo;
833 unsigned hsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc0) << 2 | pt->hsync_offset_lo;
834 unsigned hsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x30) << 4 | pt->hsync_pulse_width_lo;
835 unsigned vsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc) >> 2 | pt->vsync_offset_pulse_width_lo >> 4;
836 unsigned vsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x3) << 4 | (pt->vsync_offset_pulse_width_lo & 0xf);
838 /* ignore tiny modes */
839 if (hactive < 64 || vactive < 64)
842 if (pt->misc & DRM_EDID_PT_STEREO) {
843 printk(KERN_WARNING "stereo mode not supported\n");
846 if (!(pt->misc & DRM_EDID_PT_SEPARATE_SYNC)) {
847 printk(KERN_WARNING "composite sync not supported\n");
850 /* it is incorrect if hsync/vsync width is zero */
851 if (!hsync_pulse_width || !vsync_pulse_width) {
852 DRM_DEBUG_KMS("Incorrect Detailed timing. "
853 "Wrong Hsync/Vsync pulse width\n");
856 mode = drm_mode_create(dev);
860 mode->type = DRM_MODE_TYPE_DRIVER;
862 if (quirks & EDID_QUIRK_135_CLOCK_TOO_HIGH)
863 timing->pixel_clock = cpu_to_le16(1088);
865 mode->clock = le16_to_cpu(timing->pixel_clock) * 10;
867 mode->hdisplay = hactive;
868 mode->hsync_start = mode->hdisplay + hsync_offset;
869 mode->hsync_end = mode->hsync_start + hsync_pulse_width;
870 mode->htotal = mode->hdisplay + hblank;
872 mode->vdisplay = vactive;
873 mode->vsync_start = mode->vdisplay + vsync_offset;
874 mode->vsync_end = mode->vsync_start + vsync_pulse_width;
875 mode->vtotal = mode->vdisplay + vblank;
877 /* Some EDIDs have bogus h/vtotal values */
878 if (mode->hsync_end > mode->htotal)
879 mode->htotal = mode->hsync_end + 1;
880 if (mode->vsync_end > mode->vtotal)
881 mode->vtotal = mode->vsync_end + 1;
883 drm_mode_do_interlace_quirk(mode, pt);
885 drm_mode_set_name(mode);
887 if (quirks & EDID_QUIRK_DETAILED_SYNC_PP) {
888 pt->misc |= DRM_EDID_PT_HSYNC_POSITIVE | DRM_EDID_PT_VSYNC_POSITIVE;
891 mode->flags |= (pt->misc & DRM_EDID_PT_HSYNC_POSITIVE) ?
892 DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC;
893 mode->flags |= (pt->misc & DRM_EDID_PT_VSYNC_POSITIVE) ?
894 DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC;
896 mode->width_mm = pt->width_mm_lo | (pt->width_height_mm_hi & 0xf0) << 4;
897 mode->height_mm = pt->height_mm_lo | (pt->width_height_mm_hi & 0xf) << 8;
899 if (quirks & EDID_QUIRK_DETAILED_IN_CM) {
900 mode->width_mm *= 10;
901 mode->height_mm *= 10;
904 if (quirks & EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE) {
905 mode->width_mm = edid->width_cm * 10;
906 mode->height_mm = edid->height_cm * 10;
913 mode_is_rb(const struct drm_display_mode *mode)
915 return (mode->htotal - mode->hdisplay == 160) &&
916 (mode->hsync_end - mode->hdisplay == 80) &&
917 (mode->hsync_end - mode->hsync_start == 32) &&
918 (mode->vsync_start - mode->vdisplay == 3);
922 mode_in_hsync_range(const struct drm_display_mode *mode,
923 struct edid *edid, u8 *t)
925 int hsync, hmin, hmax;
928 if (edid->revision >= 4)
929 hmin += ((t[4] & 0x04) ? 255 : 0);
931 if (edid->revision >= 4)
932 hmax += ((t[4] & 0x08) ? 255 : 0);
933 hsync = drm_mode_hsync(mode);
935 return (hsync <= hmax && hsync >= hmin);
939 mode_in_vsync_range(const struct drm_display_mode *mode,
940 struct edid *edid, u8 *t)
942 int vsync, vmin, vmax;
945 if (edid->revision >= 4)
946 vmin += ((t[4] & 0x01) ? 255 : 0);
948 if (edid->revision >= 4)
949 vmax += ((t[4] & 0x02) ? 255 : 0);
950 vsync = drm_mode_vrefresh(mode);
952 return (vsync <= vmax && vsync >= vmin);
956 range_pixel_clock(struct edid *edid, u8 *t)
959 if (t[9] == 0 || t[9] == 255)
962 /* 1.4 with CVT support gives us real precision, yay */
963 if (edid->revision >= 4 && t[10] == 0x04)
964 return (t[9] * 10000) - ((t[12] >> 2) * 250);
966 /* 1.3 is pathetic, so fuzz up a bit */
967 return t[9] * 10000 + 5001;
971 mode_in_range(const struct drm_display_mode *mode, struct edid *edid,
972 struct detailed_timing *timing)
975 u8 *t = (u8 *)timing;
977 if (!mode_in_hsync_range(mode, edid, t))
980 if (!mode_in_vsync_range(mode, edid, t))
983 if ((max_clock = range_pixel_clock(edid, t)))
984 if (mode->clock > max_clock)
987 /* 1.4 max horizontal check */
988 if (edid->revision >= 4 && t[10] == 0x04)
989 if (t[13] && mode->hdisplay > 8 * (t[13] + (256 * (t[12]&0x3))))
992 if (mode_is_rb(mode) && !drm_monitor_supports_rb(edid))
999 * XXX If drm_dmt_modes ever regrows the CVT-R modes (and it will) this will
1000 * need to account for them.
1003 drm_gtf_modes_for_range(struct drm_connector *connector, struct edid *edid,
1004 struct detailed_timing *timing)
1007 struct drm_display_mode *newmode;
1008 struct drm_device *dev = connector->dev;
1010 for (i = 0; i < drm_num_dmt_modes; i++) {
1011 if (mode_in_range(drm_dmt_modes + i, edid, timing)) {
1012 newmode = drm_mode_duplicate(dev, &drm_dmt_modes[i]);
1014 drm_mode_probed_add(connector, newmode);
1024 do_inferred_modes(struct detailed_timing *timing, void *c)
1026 struct detailed_mode_closure *closure = c;
1027 struct detailed_non_pixel *data = &timing->data.other_data;
1028 int gtf = (closure->edid->features & DRM_EDID_FEATURE_DEFAULT_GTF);
1030 if (gtf && data->type == EDID_DETAIL_MONITOR_RANGE)
1031 closure->modes += drm_gtf_modes_for_range(closure->connector,
1037 add_inferred_modes(struct drm_connector *connector, struct edid *edid)
1039 struct detailed_mode_closure closure = {
1040 connector, edid, 0, 0, 0
1043 if (version_greater(edid, 1, 0))
1044 drm_for_each_detailed_block((u8 *)edid, do_inferred_modes,
1047 return closure.modes;
1051 drm_est3_modes(struct drm_connector *connector, struct detailed_timing *timing)
1053 int i, j, m, modes = 0;
1054 struct drm_display_mode *mode;
1055 u8 *est = ((u8 *)timing) + 5;
1057 for (i = 0; i < 6; i++) {
1058 for (j = 7; j > 0; j--) {
1059 m = (i * 8) + (7 - j);
1060 if (m >= ARRAY_SIZE(est3_modes))
1062 if (est[i] & (1 << j)) {
1063 mode = drm_mode_find_dmt(connector->dev,
1067 /*, est3_modes[m].rb */);
1069 drm_mode_probed_add(connector, mode);
1080 do_established_modes(struct detailed_timing *timing, void *c)
1082 struct detailed_mode_closure *closure = c;
1083 struct detailed_non_pixel *data = &timing->data.other_data;
1085 if (data->type == EDID_DETAIL_EST_TIMINGS)
1086 closure->modes += drm_est3_modes(closure->connector, timing);
1090 * add_established_modes - get est. modes from EDID and add them
1091 * @edid: EDID block to scan
1093 * Each EDID block contains a bitmap of the supported "established modes" list
1094 * (defined above). Tease them out and add them to the global modes list.
1097 add_established_modes(struct drm_connector *connector, struct edid *edid)
1099 struct drm_device *dev = connector->dev;
1100 unsigned long est_bits = edid->established_timings.t1 |
1101 (edid->established_timings.t2 << 8) |
1102 ((edid->established_timings.mfg_rsvd & 0x80) << 9);
1104 struct detailed_mode_closure closure = {
1105 connector, edid, 0, 0, 0
1108 for (i = 0; i <= EDID_EST_TIMINGS; i++) {
1109 if (est_bits & (1<<i)) {
1110 struct drm_display_mode *newmode;
1111 newmode = drm_mode_duplicate(dev, &edid_est_modes[i]);
1113 drm_mode_probed_add(connector, newmode);
1119 if (version_greater(edid, 1, 0))
1120 drm_for_each_detailed_block((u8 *)edid,
1121 do_established_modes, &closure);
1123 return modes + closure.modes;
1127 do_standard_modes(struct detailed_timing *timing, void *c)
1129 struct detailed_mode_closure *closure = c;
1130 struct detailed_non_pixel *data = &timing->data.other_data;
1131 struct drm_connector *connector = closure->connector;
1132 struct edid *edid = closure->edid;
1134 if (data->type == EDID_DETAIL_STD_MODES) {
1136 for (i = 0; i < 6; i++) {
1137 struct std_timing *std;
1138 struct drm_display_mode *newmode;
1140 std = &data->data.timings[i];
1141 newmode = drm_mode_std(connector, edid, std,
1144 drm_mode_probed_add(connector, newmode);
1152 * add_standard_modes - get std. modes from EDID and add them
1153 * @edid: EDID block to scan
1155 * Standard modes can be calculated using the appropriate standard (DMT,
1156 * GTF or CVT. Grab them from @edid and add them to the list.
1159 add_standard_modes(struct drm_connector *connector, struct edid *edid)
1162 struct detailed_mode_closure closure = {
1163 connector, edid, 0, 0, 0
1166 for (i = 0; i < EDID_STD_TIMINGS; i++) {
1167 struct drm_display_mode *newmode;
1169 newmode = drm_mode_std(connector, edid,
1170 &edid->standard_timings[i],
1173 drm_mode_probed_add(connector, newmode);
1178 if (version_greater(edid, 1, 0))
1179 drm_for_each_detailed_block((u8 *)edid, do_standard_modes,
1182 /* XXX should also look for standard codes in VTB blocks */
1184 return modes + closure.modes;
1187 static int drm_cvt_modes(struct drm_connector *connector,
1188 struct detailed_timing *timing)
1190 int i, j, modes = 0;
1191 struct drm_display_mode *newmode;
1192 struct drm_device *dev = connector->dev;
1193 struct cvt_timing *cvt;
1194 const int rates[] = { 60, 85, 75, 60, 50 };
1195 const u8 empty[3] = { 0, 0, 0 };
1197 for (i = 0; i < 4; i++) {
1198 int uninitialized_var(width), height;
1199 cvt = &(timing->data.other_data.data.cvt[i]);
1201 if (!memcmp(cvt->code, empty, 3))
1204 height = (cvt->code[0] + ((cvt->code[1] & 0xf0) << 4) + 1) * 2;
1205 switch (cvt->code[1] & 0x0c) {
1207 width = height * 4 / 3;
1210 width = height * 16 / 9;
1213 width = height * 16 / 10;
1216 width = height * 15 / 9;
1220 for (j = 1; j < 5; j++) {
1221 if (cvt->code[2] & (1 << j)) {
1222 newmode = drm_cvt_mode(dev, width, height,
1226 drm_mode_probed_add(connector, newmode);
1237 do_cvt_mode(struct detailed_timing *timing, void *c)
1239 struct detailed_mode_closure *closure = c;
1240 struct detailed_non_pixel *data = &timing->data.other_data;
1242 if (data->type == EDID_DETAIL_CVT_3BYTE)
1243 closure->modes += drm_cvt_modes(closure->connector, timing);
1247 add_cvt_modes(struct drm_connector *connector, struct edid *edid)
1249 struct detailed_mode_closure closure = {
1250 connector, edid, 0, 0, 0
1253 if (version_greater(edid, 1, 2))
1254 drm_for_each_detailed_block((u8 *)edid, do_cvt_mode, &closure);
1256 /* XXX should also look for CVT codes in VTB blocks */
1258 return closure.modes;
1262 do_detailed_mode(struct detailed_timing *timing, void *c)
1264 struct detailed_mode_closure *closure = c;
1265 struct drm_display_mode *newmode;
1267 if (timing->pixel_clock) {
1268 newmode = drm_mode_detailed(closure->connector->dev,
1269 closure->edid, timing,
1274 if (closure->preferred)
1275 newmode->type |= DRM_MODE_TYPE_PREFERRED;
1277 drm_mode_probed_add(closure->connector, newmode);
1279 closure->preferred = 0;
1284 * add_detailed_modes - Add modes from detailed timings
1285 * @connector: attached connector
1286 * @edid: EDID block to scan
1287 * @quirks: quirks to apply
1290 add_detailed_modes(struct drm_connector *connector, struct edid *edid,
1293 struct detailed_mode_closure closure = {
1301 if (closure.preferred && !version_greater(edid, 1, 3))
1303 (edid->features & DRM_EDID_FEATURE_PREFERRED_TIMING);
1305 drm_for_each_detailed_block((u8 *)edid, do_detailed_mode, &closure);
1307 return closure.modes;
1310 #define HDMI_IDENTIFIER 0x000C03
1311 #define AUDIO_BLOCK 0x01
1312 #define VIDEO_BLOCK 0x02
1313 #define VENDOR_BLOCK 0x03
1314 #define SPEAKER_BLOCK 0x04
1315 #define EDID_BASIC_AUDIO (1 << 6)
1318 * Search EDID for CEA extension block.
1320 u8 *drm_find_cea_extension(struct edid *edid)
1322 u8 *edid_ext = NULL;
1325 /* No EDID or EDID extensions */
1326 if (edid == NULL || edid->extensions == 0)
1329 /* Find CEA extension */
1330 for (i = 0; i < edid->extensions; i++) {
1331 edid_ext = (u8 *)edid + EDID_LENGTH * (i + 1);
1332 if (edid_ext[0] == CEA_EXT)
1336 if (i == edid->extensions)
1341 EXPORT_SYMBOL(drm_find_cea_extension);
1344 do_cea_modes (struct drm_connector *connector, u8 *db, u8 len)
1346 struct drm_device *dev = connector->dev;
1347 u8 * mode, cea_mode;
1350 for (mode = db; mode < db + len; mode++) {
1351 cea_mode = (*mode & 127) - 1; /* CEA modes are numbered 1..127 */
1352 if (cea_mode < drm_num_cea_modes) {
1353 struct drm_display_mode *newmode;
1354 newmode = drm_mode_duplicate(dev,
1355 &edid_cea_modes[cea_mode]);
1357 drm_mode_probed_add(connector, newmode);
1367 add_cea_modes(struct drm_connector *connector, struct edid *edid)
1369 u8 * cea = drm_find_cea_extension(edid);
1373 if (cea && cea[1] >= 3) {
1374 for (db = cea + 4; db < cea + cea[2]; db += dbl + 1) {
1376 if (((db[0] & 0xe0) >> 5) == VIDEO_BLOCK)
1377 modes += do_cea_modes (connector, db+1, dbl);
1385 parse_hdmi_vsdb(struct drm_connector *connector, uint8_t *db)
1387 connector->eld[5] |= (db[6] >> 7) << 1; /* Supports_AI */
1389 connector->dvi_dual = db[6] & 1;
1390 connector->max_tmds_clock = db[7] * 5;
1392 connector->latency_present[0] = db[8] >> 7;
1393 connector->latency_present[1] = (db[8] >> 6) & 1;
1394 connector->video_latency[0] = db[9];
1395 connector->audio_latency[0] = db[10];
1396 connector->video_latency[1] = db[11];
1397 connector->audio_latency[1] = db[12];
1399 DRM_LOG_KMS("HDMI: DVI dual %d, "
1400 "max TMDS clock %d, "
1401 "latency present %d %d, "
1402 "video latency %d %d, "
1403 "audio latency %d %d\n",
1404 connector->dvi_dual,
1405 connector->max_tmds_clock,
1406 (int) connector->latency_present[0],
1407 (int) connector->latency_present[1],
1408 connector->video_latency[0],
1409 connector->video_latency[1],
1410 connector->audio_latency[0],
1411 connector->audio_latency[1]);
1415 monitor_name(struct detailed_timing *t, void *data)
1417 if (t->data.other_data.type == EDID_DETAIL_MONITOR_NAME)
1418 *(u8 **)data = t->data.other_data.data.str.str;
1422 * drm_edid_to_eld - build ELD from EDID
1423 * @connector: connector corresponding to the HDMI/DP sink
1424 * @edid: EDID to parse
1426 * Fill the ELD (EDID-Like Data) buffer for passing to the audio driver.
1427 * Some ELD fields are left to the graphics driver caller:
1432 void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
1434 uint8_t *eld = connector->eld;
1442 memset(eld, 0, sizeof(connector->eld));
1444 cea = drm_find_cea_extension(edid);
1446 DRM_DEBUG_KMS("ELD: no CEA Extension found\n");
1451 drm_for_each_detailed_block((u8 *)edid, monitor_name, &name);
1452 for (mnl = 0; name && mnl < 13; mnl++) {
1453 if (name[mnl] == 0x0a)
1455 eld[20 + mnl] = name[mnl];
1457 eld[4] = (cea[1] << 5) | mnl;
1458 DRM_DEBUG_KMS("ELD monitor %s\n", eld + 20);
1460 eld[0] = 2 << 3; /* ELD version: 2 */
1462 eld[16] = edid->mfg_id[0];
1463 eld[17] = edid->mfg_id[1];
1464 eld[18] = edid->prod_code[0];
1465 eld[19] = edid->prod_code[1];
1468 for (db = cea + 4; db < cea + cea[2]; db += dbl + 1) {
1471 switch ((db[0] & 0xe0) >> 5) {
1473 /* Audio Data Block, contains SADs */
1474 sad_count = dbl / 3;
1475 memcpy(eld + 20 + mnl, &db[1], dbl);
1478 /* Speaker Allocation Data Block */
1482 /* HDMI Vendor-Specific Data Block */
1483 if (db[1] == 0x03 && db[2] == 0x0c && db[3] == 0)
1484 parse_hdmi_vsdb(connector, db);
1490 eld[5] |= sad_count << 4;
1491 eld[2] = (20 + mnl + sad_count * 3 + 3) / 4;
1493 DRM_DEBUG_KMS("ELD size %d, SAD count %d\n", (int)eld[2], sad_count);
1495 EXPORT_SYMBOL(drm_edid_to_eld);
1498 * drm_av_sync_delay - HDMI/DP sink audio-video sync delay in millisecond
1499 * @connector: connector associated with the HDMI/DP sink
1500 * @mode: the display mode
1502 int drm_av_sync_delay(struct drm_connector *connector,
1503 struct drm_display_mode *mode)
1505 int i = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
1508 if (!connector->latency_present[0])
1510 if (!connector->latency_present[1])
1513 a = connector->audio_latency[i];
1514 v = connector->video_latency[i];
1517 * HDMI/DP sink doesn't support audio or video?
1519 if (a == 255 || v == 255)
1523 * Convert raw EDID values to millisecond.
1524 * Treat unknown latency as 0ms.
1527 a = min(2 * (a - 1), 500);
1529 v = min(2 * (v - 1), 500);
1531 return max(v - a, 0);
1533 EXPORT_SYMBOL(drm_av_sync_delay);
1536 * drm_select_eld - select one ELD from multiple HDMI/DP sinks
1537 * @encoder: the encoder just changed display mode
1538 * @mode: the adjusted display mode
1540 * It's possible for one encoder to be associated with multiple HDMI/DP sinks.
1541 * The policy is now hard coded to simply use the first HDMI/DP sink's ELD.
1543 struct drm_connector *drm_select_eld(struct drm_encoder *encoder,
1544 struct drm_display_mode *mode)
1546 struct drm_connector *connector;
1547 struct drm_device *dev = encoder->dev;
1549 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
1550 if (connector->encoder == encoder && connector->eld[0])
1555 EXPORT_SYMBOL(drm_select_eld);
1558 * drm_detect_hdmi_monitor - detect whether monitor is hdmi.
1559 * @edid: monitor EDID information
1561 * Parse the CEA extension according to CEA-861-B.
1562 * Return true if HDMI, false if not or unknown.
1564 bool drm_detect_hdmi_monitor(struct edid *edid)
1568 int start_offset, end_offset;
1569 bool is_hdmi = false;
1571 edid_ext = drm_find_cea_extension(edid);
1575 /* Data block offset in CEA extension block */
1577 end_offset = edid_ext[2];
1580 * Because HDMI identifier is in Vendor Specific Block,
1581 * search it from all data blocks of CEA extension.
1583 for (i = start_offset; i < end_offset;
1584 /* Increased by data block len */
1585 i += ((edid_ext[i] & 0x1f) + 1)) {
1586 /* Find vendor specific block */
1587 if ((edid_ext[i] >> 5) == VENDOR_BLOCK) {
1588 hdmi_id = edid_ext[i + 1] | (edid_ext[i + 2] << 8) |
1589 edid_ext[i + 3] << 16;
1590 /* Find HDMI identifier */
1591 if (hdmi_id == HDMI_IDENTIFIER)
1600 EXPORT_SYMBOL(drm_detect_hdmi_monitor);
1603 * drm_detect_monitor_audio - check monitor audio capability
1605 * Monitor should have CEA extension block.
1606 * If monitor has 'basic audio', but no CEA audio blocks, it's 'basic
1607 * audio' only. If there is any audio extension block and supported
1608 * audio format, assume at least 'basic audio' support, even if 'basic
1609 * audio' is not defined in EDID.
1612 bool drm_detect_monitor_audio(struct edid *edid)
1616 bool has_audio = false;
1617 int start_offset, end_offset;
1619 edid_ext = drm_find_cea_extension(edid);
1623 has_audio = ((edid_ext[3] & EDID_BASIC_AUDIO) != 0);
1626 DRM_DEBUG_KMS("Monitor has basic audio support\n");
1630 /* Data block offset in CEA extension block */
1632 end_offset = edid_ext[2];
1634 for (i = start_offset; i < end_offset;
1635 i += ((edid_ext[i] & 0x1f) + 1)) {
1636 if ((edid_ext[i] >> 5) == AUDIO_BLOCK) {
1638 for (j = 1; j < (edid_ext[i] & 0x1f); j += 3)
1639 DRM_DEBUG_KMS("CEA audio format %d\n",
1640 (edid_ext[i + j] >> 3) & 0xf);
1647 EXPORT_SYMBOL(drm_detect_monitor_audio);
1650 * drm_add_display_info - pull display info out if present
1652 * @info: display info (attached to connector)
1654 * Grab any available display info and stuff it into the drm_display_info
1655 * structure that's part of the connector. Useful for tracking bpp and
1658 static void drm_add_display_info(struct edid *edid,
1659 struct drm_display_info *info)
1663 info->width_mm = edid->width_cm * 10;
1664 info->height_mm = edid->height_cm * 10;
1666 /* driver figures it out in this case */
1668 info->color_formats = 0;
1670 /* Only defined for 1.4 with digital displays */
1671 if (edid->revision < 4)
1674 if (!(edid->input & DRM_EDID_INPUT_DIGITAL))
1677 switch (edid->input & DRM_EDID_DIGITAL_DEPTH_MASK) {
1678 case DRM_EDID_DIGITAL_DEPTH_6:
1681 case DRM_EDID_DIGITAL_DEPTH_8:
1684 case DRM_EDID_DIGITAL_DEPTH_10:
1687 case DRM_EDID_DIGITAL_DEPTH_12:
1690 case DRM_EDID_DIGITAL_DEPTH_14:
1693 case DRM_EDID_DIGITAL_DEPTH_16:
1696 case DRM_EDID_DIGITAL_DEPTH_UNDEF:
1702 info->color_formats = DRM_COLOR_FORMAT_RGB444;
1703 if (info->color_formats & DRM_EDID_FEATURE_RGB_YCRCB444)
1704 info->color_formats = DRM_COLOR_FORMAT_YCRCB444;
1705 if (info->color_formats & DRM_EDID_FEATURE_RGB_YCRCB422)
1706 info->color_formats = DRM_COLOR_FORMAT_YCRCB422;
1708 /* Get data from CEA blocks if present */
1709 edid_ext = drm_find_cea_extension(edid);
1713 info->cea_rev = edid_ext[1];
1717 * drm_add_edid_modes - add modes from EDID data, if available
1718 * @connector: connector we're probing
1721 * Add the specified modes to the connector's mode list.
1723 * Return number of modes added or 0 if we couldn't find any.
1725 int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid)
1733 if (!drm_edid_is_valid(edid)) {
1734 dev_warn(connector->dev->dev, "%s: EDID invalid.\n",
1735 drm_get_connector_name(connector));
1739 quirks = edid_get_quirks(edid);
1742 * EDID spec says modes should be preferred in this order:
1743 * - preferred detailed mode
1744 * - other detailed modes from base block
1745 * - detailed modes from extension blocks
1746 * - CVT 3-byte code modes
1747 * - standard timing codes
1748 * - established timing codes
1749 * - modes inferred from GTF or CVT range information
1751 * We get this pretty much right.
1753 * XXX order for additional mode types in extension blocks?
1755 num_modes += add_detailed_modes(connector, edid, quirks);
1756 num_modes += add_cvt_modes(connector, edid);
1757 num_modes += add_standard_modes(connector, edid);
1758 num_modes += add_established_modes(connector, edid);
1759 num_modes += add_inferred_modes(connector, edid);
1760 num_modes += add_cea_modes(connector, edid);
1762 if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75))
1763 edid_fixup_preferred(connector, quirks);
1765 drm_add_display_info(edid, &connector->display_info);
1769 EXPORT_SYMBOL(drm_add_edid_modes);
1772 * drm_add_modes_noedid - add modes for the connectors without EDID
1773 * @connector: connector we're probing
1774 * @hdisplay: the horizontal display limit
1775 * @vdisplay: the vertical display limit
1777 * Add the specified modes to the connector's mode list. Only when the
1778 * hdisplay/vdisplay is not beyond the given limit, it will be added.
1780 * Return number of modes added or 0 if we couldn't find any.
1782 int drm_add_modes_noedid(struct drm_connector *connector,
1783 int hdisplay, int vdisplay)
1785 int i, count, num_modes = 0;
1786 struct drm_display_mode *mode;
1787 struct drm_device *dev = connector->dev;
1789 count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
1795 for (i = 0; i < count; i++) {
1796 const struct drm_display_mode *ptr = &drm_dmt_modes[i];
1797 if (hdisplay && vdisplay) {
1799 * Only when two are valid, they will be used to check
1800 * whether the mode should be added to the mode list of
1803 if (ptr->hdisplay > hdisplay ||
1804 ptr->vdisplay > vdisplay)
1807 if (drm_mode_vrefresh(ptr) > 61)
1809 mode = drm_mode_duplicate(dev, ptr);
1811 drm_mode_probed_add(connector, mode);
1817 EXPORT_SYMBOL(drm_add_modes_noedid);