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)
69 /* Force reduced-blanking timings for detailed modes */
70 #define EDID_QUIRK_FORCE_REDUCED_BLANKING (1 << 7)
72 struct detailed_mode_closure {
73 struct drm_connector *connector;
85 static struct edid_quirk {
89 } edid_quirk_list[] = {
91 { "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 },
126 /* ViewSonic VA2026w */
127 { "VSC", 5020, EDID_QUIRK_FORCE_REDUCED_BLANKING },
129 /* Medion MD 30217 PG */
130 { "MED", 0x7b8, EDID_QUIRK_PREFER_LARGE_75 },
133 /*** DDC fetch and block validation ***/
135 static const u8 edid_header[] = {
136 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00
140 * Sanity check the header of the base EDID block. Return 8 if the header
141 * is perfect, down to 0 if it's totally wrong.
143 int drm_edid_header_is_valid(const u8 *raw_edid)
147 for (i = 0; i < sizeof(edid_header); i++)
148 if (raw_edid[i] == edid_header[i])
153 EXPORT_SYMBOL(drm_edid_header_is_valid);
157 * Sanity check the EDID block (base or extension). Return 0 if the block
158 * doesn't check out, or 1 if it's valid.
161 drm_edid_block_valid(u8 *raw_edid)
165 struct edid *edid = (struct edid *)raw_edid;
167 if (raw_edid[0] == 0x00) {
168 int score = drm_edid_header_is_valid(raw_edid);
170 else if (score >= 6) {
171 DRM_DEBUG("Fixing EDID header, your hardware may be failing\n");
172 memcpy(raw_edid, edid_header, sizeof(edid_header));
178 for (i = 0; i < EDID_LENGTH; i++)
181 DRM_ERROR("EDID checksum is invalid, remainder is %d\n", csum);
183 /* allow CEA to slide through, switches mangle this */
184 if (raw_edid[0] != 0x02)
188 /* per-block-type checks */
189 switch (raw_edid[0]) {
191 if (edid->version != 1) {
192 DRM_ERROR("EDID has major version %d, instead of 1\n", edid->version);
196 if (edid->revision > 4)
197 DRM_DEBUG("EDID minor > 4, assuming backward compatibility\n");
208 printk(KERN_ERR "Raw EDID:\n");
209 print_hex_dump(KERN_ERR, " \t", DUMP_PREFIX_NONE, 16, 1,
210 raw_edid, EDID_LENGTH, false);
216 * drm_edid_is_valid - sanity check EDID data
219 * Sanity-check an entire EDID record (including extensions)
221 bool drm_edid_is_valid(struct edid *edid)
224 u8 *raw = (u8 *)edid;
229 for (i = 0; i <= edid->extensions; i++)
230 if (!drm_edid_block_valid(raw + i * EDID_LENGTH))
235 EXPORT_SYMBOL(drm_edid_is_valid);
237 #define DDC_ADDR 0x50
238 #define DDC_SEGMENT_ADDR 0x30
240 * Get EDID information via I2C.
242 * \param adapter : i2c device adaptor
243 * \param buf : EDID data buffer to be filled
244 * \param len : EDID data buffer length
245 * \return 0 on success or -1 on failure.
247 * Try to fetch EDID information by calling i2c driver function.
250 drm_do_probe_ddc_edid(struct i2c_adapter *adapter, unsigned char *buf,
253 unsigned char start = block * EDID_LENGTH;
254 int ret, retries = 5;
256 /* The core i2c driver will automatically retry the transfer if the
257 * adapter reports EAGAIN. However, we find that bit-banging transfers
258 * are susceptible to errors under a heavily loaded machine and
259 * generate spurious NAKs and timeouts. Retrying the transfer
260 * of the individual block a few times seems to overcome this.
263 struct i2c_msg msgs[] = {
276 ret = i2c_transfer(adapter, msgs, 2);
278 DRM_DEBUG_KMS("drm: skipping non-existent adapter %s\n",
282 } while (ret != 2 && --retries);
284 return ret == 2 ? 0 : -1;
287 static bool drm_edid_is_zero(u8 *in_edid, int length)
290 u32 *raw_edid = (u32 *)in_edid;
292 for (i = 0; i < length / 4; i++)
293 if (*(raw_edid + i) != 0)
299 drm_do_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter)
301 int i, j = 0, valid_extensions = 0;
304 if ((block = kmalloc(EDID_LENGTH, GFP_KERNEL)) == NULL)
307 /* base block fetch */
308 for (i = 0; i < 4; i++) {
309 if (drm_do_probe_ddc_edid(adapter, block, 0, EDID_LENGTH))
311 if (drm_edid_block_valid(block))
313 if (i == 0 && drm_edid_is_zero(block, EDID_LENGTH)) {
314 connector->null_edid_counter++;
321 /* if there's no extensions, we're done */
322 if (block[0x7e] == 0)
325 new = krealloc(block, (block[0x7e] + 1) * EDID_LENGTH, GFP_KERNEL);
330 for (j = 1; j <= block[0x7e]; j++) {
331 for (i = 0; i < 4; i++) {
332 if (drm_do_probe_ddc_edid(adapter,
333 block + (valid_extensions + 1) * EDID_LENGTH,
336 if (drm_edid_block_valid(block + (valid_extensions + 1) * EDID_LENGTH)) {
342 dev_warn(connector->dev->dev,
343 "%s: Ignoring invalid EDID block %d.\n",
344 drm_get_connector_name(connector), j);
347 if (valid_extensions != block[0x7e]) {
348 block[EDID_LENGTH-1] += block[0x7e] - valid_extensions;
349 block[0x7e] = valid_extensions;
350 new = krealloc(block, (valid_extensions + 1) * EDID_LENGTH, GFP_KERNEL);
359 dev_warn(connector->dev->dev, "%s: EDID block %d invalid.\n",
360 drm_get_connector_name(connector), j);
368 * Probe DDC presence.
370 * \param adapter : i2c device adaptor
371 * \return 1 on success
374 drm_probe_ddc(struct i2c_adapter *adapter)
378 return (drm_do_probe_ddc_edid(adapter, &out, 0, 1) == 0);
382 * drm_get_edid - get EDID data, if available
383 * @connector: connector we're probing
384 * @adapter: i2c adapter to use for DDC
386 * Poke the given i2c channel to grab EDID data if possible. If found,
387 * attach it to the connector.
389 * Return edid data or NULL if we couldn't find any.
391 struct edid *drm_get_edid(struct drm_connector *connector,
392 struct i2c_adapter *adapter)
394 struct edid *edid = NULL;
396 if (drm_probe_ddc(adapter))
397 edid = (struct edid *)drm_do_get_edid(connector, adapter);
399 connector->display_info.raw_edid = (char *)edid;
404 EXPORT_SYMBOL(drm_get_edid);
406 /*** EDID parsing ***/
409 * edid_vendor - match a string against EDID's obfuscated vendor field
410 * @edid: EDID to match
411 * @vendor: vendor string
413 * Returns true if @vendor is in @edid, false otherwise
415 static bool edid_vendor(struct edid *edid, char *vendor)
419 edid_vendor[0] = ((edid->mfg_id[0] & 0x7c) >> 2) + '@';
420 edid_vendor[1] = (((edid->mfg_id[0] & 0x3) << 3) |
421 ((edid->mfg_id[1] & 0xe0) >> 5)) + '@';
422 edid_vendor[2] = (edid->mfg_id[1] & 0x1f) + '@';
424 return !strncmp(edid_vendor, vendor, 3);
428 * edid_get_quirks - return quirk flags for a given EDID
429 * @edid: EDID to process
431 * This tells subsequent routines what fixes they need to apply.
433 static u32 edid_get_quirks(struct edid *edid)
435 struct edid_quirk *quirk;
438 for (i = 0; i < ARRAY_SIZE(edid_quirk_list); i++) {
439 quirk = &edid_quirk_list[i];
441 if (edid_vendor(edid, quirk->vendor) &&
442 (EDID_PRODUCT_ID(edid) == quirk->product_id))
443 return quirk->quirks;
449 #define MODE_SIZE(m) ((m)->hdisplay * (m)->vdisplay)
450 #define MODE_REFRESH_DIFF(m,r) (abs((m)->vrefresh - target_refresh))
453 * edid_fixup_preferred - set preferred modes based on quirk list
454 * @connector: has mode list to fix up
455 * @quirks: quirks list
457 * Walk the mode list for @connector, clearing the preferred status
458 * on existing modes and setting it anew for the right mode ala @quirks.
460 static void edid_fixup_preferred(struct drm_connector *connector,
463 struct drm_display_mode *t, *cur_mode, *preferred_mode;
464 int target_refresh = 0;
466 if (list_empty(&connector->probed_modes))
469 if (quirks & EDID_QUIRK_PREFER_LARGE_60)
471 if (quirks & EDID_QUIRK_PREFER_LARGE_75)
474 preferred_mode = list_first_entry(&connector->probed_modes,
475 struct drm_display_mode, head);
477 list_for_each_entry_safe(cur_mode, t, &connector->probed_modes, head) {
478 cur_mode->type &= ~DRM_MODE_TYPE_PREFERRED;
480 if (cur_mode == preferred_mode)
483 /* Largest mode is preferred */
484 if (MODE_SIZE(cur_mode) > MODE_SIZE(preferred_mode))
485 preferred_mode = cur_mode;
487 /* At a given size, try to get closest to target refresh */
488 if ((MODE_SIZE(cur_mode) == MODE_SIZE(preferred_mode)) &&
489 MODE_REFRESH_DIFF(cur_mode, target_refresh) <
490 MODE_REFRESH_DIFF(preferred_mode, target_refresh)) {
491 preferred_mode = cur_mode;
495 preferred_mode->type |= DRM_MODE_TYPE_PREFERRED;
498 struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev,
499 int hsize, int vsize, int fresh)
501 struct drm_display_mode *mode = NULL;
504 for (i = 0; i < drm_num_dmt_modes; i++) {
505 const struct drm_display_mode *ptr = &drm_dmt_modes[i];
506 if (hsize == ptr->hdisplay &&
507 vsize == ptr->vdisplay &&
508 fresh == drm_mode_vrefresh(ptr)) {
509 /* get the expected default mode */
510 mode = drm_mode_duplicate(dev, ptr);
516 EXPORT_SYMBOL(drm_mode_find_dmt);
518 typedef void detailed_cb(struct detailed_timing *timing, void *closure);
521 cea_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure)
524 u8 rev = ext[0x01], d = ext[0x02];
525 u8 *det_base = ext + d;
532 /* have to infer how many blocks we have, check pixel clock */
533 for (i = 0; i < 6; i++)
534 if (det_base[18*i] || det_base[18*i+1])
539 n = min(ext[0x03] & 0x0f, 6);
543 for (i = 0; i < n; i++)
544 cb((struct detailed_timing *)(det_base + 18 * i), closure);
548 vtb_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure)
550 unsigned int i, n = min((int)ext[0x02], 6);
551 u8 *det_base = ext + 5;
554 return; /* unknown version */
556 for (i = 0; i < n; i++)
557 cb((struct detailed_timing *)(det_base + 18 * i), closure);
561 drm_for_each_detailed_block(u8 *raw_edid, detailed_cb *cb, void *closure)
564 struct edid *edid = (struct edid *)raw_edid;
569 for (i = 0; i < EDID_DETAILED_TIMINGS; i++)
570 cb(&(edid->detailed_timings[i]), closure);
572 for (i = 1; i <= raw_edid[0x7e]; i++) {
573 u8 *ext = raw_edid + (i * EDID_LENGTH);
576 cea_for_each_detailed_block(ext, cb, closure);
579 vtb_for_each_detailed_block(ext, cb, closure);
588 is_rb(struct detailed_timing *t, void *data)
591 if (r[3] == EDID_DETAIL_MONITOR_RANGE)
593 *(bool *)data = true;
596 /* EDID 1.4 defines this explicitly. For EDID 1.3, we guess, badly. */
598 drm_monitor_supports_rb(struct edid *edid)
600 if (edid->revision >= 4) {
602 drm_for_each_detailed_block((u8 *)edid, is_rb, &ret);
606 return ((edid->input & DRM_EDID_INPUT_DIGITAL) != 0);
610 find_gtf2(struct detailed_timing *t, void *data)
613 if (r[3] == EDID_DETAIL_MONITOR_RANGE && r[10] == 0x02)
617 /* Secondary GTF curve kicks in above some break frequency */
619 drm_gtf2_hbreak(struct edid *edid)
622 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
623 return r ? (r[12] * 2) : 0;
627 drm_gtf2_2c(struct edid *edid)
630 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
631 return r ? r[13] : 0;
635 drm_gtf2_m(struct edid *edid)
638 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
639 return r ? (r[15] << 8) + r[14] : 0;
643 drm_gtf2_k(struct edid *edid)
646 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
647 return r ? r[16] : 0;
651 drm_gtf2_2j(struct edid *edid)
654 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
655 return r ? r[17] : 0;
659 * standard_timing_level - get std. timing level(CVT/GTF/DMT)
660 * @edid: EDID block to scan
662 static int standard_timing_level(struct edid *edid)
664 if (edid->revision >= 2) {
665 if (edid->revision >= 4 && (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF))
667 if (drm_gtf2_hbreak(edid))
675 * 0 is reserved. The spec says 0x01 fill for unused timings. Some old
676 * monitors fill with ascii space (0x20) instead.
679 bad_std_timing(u8 a, u8 b)
681 return (a == 0x00 && b == 0x00) ||
682 (a == 0x01 && b == 0x01) ||
683 (a == 0x20 && b == 0x20);
687 * drm_mode_std - convert standard mode info (width, height, refresh) into mode
688 * @t: standard timing params
689 * @timing_level: standard timing level
691 * Take the standard timing params (in this case width, aspect, and refresh)
692 * and convert them into a real mode using CVT/GTF/DMT.
694 static struct drm_display_mode *
695 drm_mode_std(struct drm_connector *connector, struct edid *edid,
696 struct std_timing *t, int revision)
698 struct drm_device *dev = connector->dev;
699 struct drm_display_mode *m, *mode = NULL;
702 unsigned aspect_ratio = (t->vfreq_aspect & EDID_TIMING_ASPECT_MASK)
703 >> EDID_TIMING_ASPECT_SHIFT;
704 unsigned vfreq = (t->vfreq_aspect & EDID_TIMING_VFREQ_MASK)
705 >> EDID_TIMING_VFREQ_SHIFT;
706 int timing_level = standard_timing_level(edid);
708 if (bad_std_timing(t->hsize, t->vfreq_aspect))
711 /* According to the EDID spec, the hdisplay = hsize * 8 + 248 */
712 hsize = t->hsize * 8 + 248;
713 /* vrefresh_rate = vfreq + 60 */
714 vrefresh_rate = vfreq + 60;
715 /* the vdisplay is calculated based on the aspect ratio */
716 if (aspect_ratio == 0) {
720 vsize = (hsize * 10) / 16;
721 } else if (aspect_ratio == 1)
722 vsize = (hsize * 3) / 4;
723 else if (aspect_ratio == 2)
724 vsize = (hsize * 4) / 5;
726 vsize = (hsize * 9) / 16;
728 /* HDTV hack, part 1 */
729 if (vrefresh_rate == 60 &&
730 ((hsize == 1360 && vsize == 765) ||
731 (hsize == 1368 && vsize == 769))) {
737 * If this connector already has a mode for this size and refresh
738 * rate (because it came from detailed or CVT info), use that
739 * instead. This way we don't have to guess at interlace or
742 list_for_each_entry(m, &connector->probed_modes, head)
743 if (m->hdisplay == hsize && m->vdisplay == vsize &&
744 drm_mode_vrefresh(m) == vrefresh_rate)
747 /* HDTV hack, part 2 */
748 if (hsize == 1366 && vsize == 768 && vrefresh_rate == 60) {
749 mode = drm_cvt_mode(dev, 1366, 768, vrefresh_rate, 0, 0,
751 mode->hdisplay = 1366;
752 mode->hsync_start = mode->hsync_start - 1;
753 mode->hsync_end = mode->hsync_end - 1;
757 /* check whether it can be found in default mode table */
758 mode = drm_mode_find_dmt(dev, hsize, vsize, vrefresh_rate);
762 switch (timing_level) {
766 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
770 * This is potentially wrong if there's ever a monitor with
771 * more than one ranges section, each claiming a different
772 * secondary GTF curve. Please don't do that.
774 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
775 if (drm_mode_hsync(mode) > drm_gtf2_hbreak(edid)) {
777 mode = drm_gtf_mode_complex(dev, hsize, vsize,
786 mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0,
794 * EDID is delightfully ambiguous about how interlaced modes are to be
795 * encoded. Our internal representation is of frame height, but some
796 * HDTV detailed timings are encoded as field height.
798 * The format list here is from CEA, in frame size. Technically we
799 * should be checking refresh rate too. Whatever.
802 drm_mode_do_interlace_quirk(struct drm_display_mode *mode,
803 struct detailed_pixel_timing *pt)
806 static const struct {
808 } cea_interlaced[] = {
818 if (!(pt->misc & DRM_EDID_PT_INTERLACED))
821 for (i = 0; i < ARRAY_SIZE(cea_interlaced); i++) {
822 if ((mode->hdisplay == cea_interlaced[i].w) &&
823 (mode->vdisplay == cea_interlaced[i].h / 2)) {
825 mode->vsync_start *= 2;
826 mode->vsync_end *= 2;
832 mode->flags |= DRM_MODE_FLAG_INTERLACE;
836 * drm_mode_detailed - create a new mode from an EDID detailed timing section
837 * @dev: DRM device (needed to create new mode)
839 * @timing: EDID detailed timing info
840 * @quirks: quirks to apply
842 * An EDID detailed timing block contains enough info for us to create and
843 * return a new struct drm_display_mode.
845 static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev,
847 struct detailed_timing *timing,
850 struct drm_display_mode *mode;
851 struct detailed_pixel_timing *pt = &timing->data.pixel_data;
852 unsigned hactive = (pt->hactive_hblank_hi & 0xf0) << 4 | pt->hactive_lo;
853 unsigned vactive = (pt->vactive_vblank_hi & 0xf0) << 4 | pt->vactive_lo;
854 unsigned hblank = (pt->hactive_hblank_hi & 0xf) << 8 | pt->hblank_lo;
855 unsigned vblank = (pt->vactive_vblank_hi & 0xf) << 8 | pt->vblank_lo;
856 unsigned hsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc0) << 2 | pt->hsync_offset_lo;
857 unsigned hsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x30) << 4 | pt->hsync_pulse_width_lo;
858 unsigned vsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc) << 2 | pt->vsync_offset_pulse_width_lo >> 4;
859 unsigned vsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x3) << 4 | (pt->vsync_offset_pulse_width_lo & 0xf);
861 /* ignore tiny modes */
862 if (hactive < 64 || vactive < 64)
865 if (pt->misc & DRM_EDID_PT_STEREO) {
866 printk(KERN_WARNING "stereo mode not supported\n");
869 if (!(pt->misc & DRM_EDID_PT_SEPARATE_SYNC)) {
870 printk(KERN_WARNING "composite sync not supported\n");
873 /* it is incorrect if hsync/vsync width is zero */
874 if (!hsync_pulse_width || !vsync_pulse_width) {
875 DRM_DEBUG_KMS("Incorrect Detailed timing. "
876 "Wrong Hsync/Vsync pulse width\n");
880 if (quirks & EDID_QUIRK_FORCE_REDUCED_BLANKING) {
881 mode = drm_cvt_mode(dev, hactive, vactive, 60, true, false, false);
888 mode = drm_mode_create(dev);
892 if (quirks & EDID_QUIRK_135_CLOCK_TOO_HIGH)
893 timing->pixel_clock = cpu_to_le16(1088);
895 mode->clock = le16_to_cpu(timing->pixel_clock) * 10;
897 mode->hdisplay = hactive;
898 mode->hsync_start = mode->hdisplay + hsync_offset;
899 mode->hsync_end = mode->hsync_start + hsync_pulse_width;
900 mode->htotal = mode->hdisplay + hblank;
902 mode->vdisplay = vactive;
903 mode->vsync_start = mode->vdisplay + vsync_offset;
904 mode->vsync_end = mode->vsync_start + vsync_pulse_width;
905 mode->vtotal = mode->vdisplay + vblank;
907 /* Some EDIDs have bogus h/vtotal values */
908 if (mode->hsync_end > mode->htotal)
909 mode->htotal = mode->hsync_end + 1;
910 if (mode->vsync_end > mode->vtotal)
911 mode->vtotal = mode->vsync_end + 1;
913 drm_mode_do_interlace_quirk(mode, pt);
915 if (quirks & EDID_QUIRK_DETAILED_SYNC_PP) {
916 pt->misc |= DRM_EDID_PT_HSYNC_POSITIVE | DRM_EDID_PT_VSYNC_POSITIVE;
919 mode->flags |= (pt->misc & DRM_EDID_PT_HSYNC_POSITIVE) ?
920 DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC;
921 mode->flags |= (pt->misc & DRM_EDID_PT_VSYNC_POSITIVE) ?
922 DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC;
925 mode->width_mm = pt->width_mm_lo | (pt->width_height_mm_hi & 0xf0) << 4;
926 mode->height_mm = pt->height_mm_lo | (pt->width_height_mm_hi & 0xf) << 8;
928 if (quirks & EDID_QUIRK_DETAILED_IN_CM) {
929 mode->width_mm *= 10;
930 mode->height_mm *= 10;
933 if (quirks & EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE) {
934 mode->width_mm = edid->width_cm * 10;
935 mode->height_mm = edid->height_cm * 10;
938 mode->type = DRM_MODE_TYPE_DRIVER;
939 mode->vrefresh = drm_mode_vrefresh(mode);
940 drm_mode_set_name(mode);
946 mode_is_rb(const struct drm_display_mode *mode)
948 return (mode->htotal - mode->hdisplay == 160) &&
949 (mode->hsync_end - mode->hdisplay == 80) &&
950 (mode->hsync_end - mode->hsync_start == 32) &&
951 (mode->vsync_start - mode->vdisplay == 3);
955 mode_in_hsync_range(const struct drm_display_mode *mode,
956 struct edid *edid, u8 *t)
958 int hsync, hmin, hmax;
961 if (edid->revision >= 4)
962 hmin += ((t[4] & 0x04) ? 255 : 0);
964 if (edid->revision >= 4)
965 hmax += ((t[4] & 0x08) ? 255 : 0);
966 hsync = drm_mode_hsync(mode);
968 return (hsync <= hmax && hsync >= hmin);
972 mode_in_vsync_range(const struct drm_display_mode *mode,
973 struct edid *edid, u8 *t)
975 int vsync, vmin, vmax;
978 if (edid->revision >= 4)
979 vmin += ((t[4] & 0x01) ? 255 : 0);
981 if (edid->revision >= 4)
982 vmax += ((t[4] & 0x02) ? 255 : 0);
983 vsync = drm_mode_vrefresh(mode);
985 return (vsync <= vmax && vsync >= vmin);
989 range_pixel_clock(struct edid *edid, u8 *t)
992 if (t[9] == 0 || t[9] == 255)
995 /* 1.4 with CVT support gives us real precision, yay */
996 if (edid->revision >= 4 && t[10] == 0x04)
997 return (t[9] * 10000) - ((t[12] >> 2) * 250);
999 /* 1.3 is pathetic, so fuzz up a bit */
1000 return t[9] * 10000 + 5001;
1004 mode_in_range(const struct drm_display_mode *mode, struct edid *edid,
1005 struct detailed_timing *timing)
1008 u8 *t = (u8 *)timing;
1010 if (!mode_in_hsync_range(mode, edid, t))
1013 if (!mode_in_vsync_range(mode, edid, t))
1016 if ((max_clock = range_pixel_clock(edid, t)))
1017 if (mode->clock > max_clock)
1020 /* 1.4 max horizontal check */
1021 if (edid->revision >= 4 && t[10] == 0x04)
1022 if (t[13] && mode->hdisplay > 8 * (t[13] + (256 * (t[12]&0x3))))
1025 if (mode_is_rb(mode) && !drm_monitor_supports_rb(edid))
1032 * XXX If drm_dmt_modes ever regrows the CVT-R modes (and it will) this will
1033 * need to account for them.
1036 drm_gtf_modes_for_range(struct drm_connector *connector, struct edid *edid,
1037 struct detailed_timing *timing)
1040 struct drm_display_mode *newmode;
1041 struct drm_device *dev = connector->dev;
1043 for (i = 0; i < drm_num_dmt_modes; i++) {
1044 if (mode_in_range(drm_dmt_modes + i, edid, timing)) {
1045 newmode = drm_mode_duplicate(dev, &drm_dmt_modes[i]);
1047 drm_mode_probed_add(connector, newmode);
1057 do_inferred_modes(struct detailed_timing *timing, void *c)
1059 struct detailed_mode_closure *closure = c;
1060 struct detailed_non_pixel *data = &timing->data.other_data;
1061 int gtf = (closure->edid->features & DRM_EDID_FEATURE_DEFAULT_GTF);
1063 if (gtf && data->type == EDID_DETAIL_MONITOR_RANGE)
1064 closure->modes += drm_gtf_modes_for_range(closure->connector,
1070 add_inferred_modes(struct drm_connector *connector, struct edid *edid)
1072 struct detailed_mode_closure closure = {
1073 connector, edid, 0, 0, 0
1076 if (version_greater(edid, 1, 0))
1077 drm_for_each_detailed_block((u8 *)edid, do_inferred_modes,
1080 return closure.modes;
1084 drm_est3_modes(struct drm_connector *connector, struct detailed_timing *timing)
1086 int i, j, m, modes = 0;
1087 struct drm_display_mode *mode;
1088 u8 *est = ((u8 *)timing) + 5;
1090 for (i = 0; i < 6; i++) {
1091 for (j = 7; j > 0; j--) {
1092 m = (i * 8) + (7 - j);
1093 if (m >= ARRAY_SIZE(est3_modes))
1095 if (est[i] & (1 << j)) {
1096 mode = drm_mode_find_dmt(connector->dev,
1100 /*, est3_modes[m].rb */);
1102 drm_mode_probed_add(connector, mode);
1113 do_established_modes(struct detailed_timing *timing, void *c)
1115 struct detailed_mode_closure *closure = c;
1116 struct detailed_non_pixel *data = &timing->data.other_data;
1118 if (data->type == EDID_DETAIL_EST_TIMINGS)
1119 closure->modes += drm_est3_modes(closure->connector, timing);
1123 * add_established_modes - get est. modes from EDID and add them
1124 * @edid: EDID block to scan
1126 * Each EDID block contains a bitmap of the supported "established modes" list
1127 * (defined above). Tease them out and add them to the global modes list.
1130 add_established_modes(struct drm_connector *connector, struct edid *edid)
1132 struct drm_device *dev = connector->dev;
1133 unsigned long est_bits = edid->established_timings.t1 |
1134 (edid->established_timings.t2 << 8) |
1135 ((edid->established_timings.mfg_rsvd & 0x80) << 9);
1137 struct detailed_mode_closure closure = {
1138 connector, edid, 0, 0, 0
1141 for (i = 0; i <= EDID_EST_TIMINGS; i++) {
1142 if (est_bits & (1<<i)) {
1143 struct drm_display_mode *newmode;
1144 newmode = drm_mode_duplicate(dev, &edid_est_modes[i]);
1146 drm_mode_probed_add(connector, newmode);
1152 if (version_greater(edid, 1, 0))
1153 drm_for_each_detailed_block((u8 *)edid,
1154 do_established_modes, &closure);
1156 return modes + closure.modes;
1160 do_standard_modes(struct detailed_timing *timing, void *c)
1162 struct detailed_mode_closure *closure = c;
1163 struct detailed_non_pixel *data = &timing->data.other_data;
1164 struct drm_connector *connector = closure->connector;
1165 struct edid *edid = closure->edid;
1167 if (data->type == EDID_DETAIL_STD_MODES) {
1169 for (i = 0; i < 6; i++) {
1170 struct std_timing *std;
1171 struct drm_display_mode *newmode;
1173 std = &data->data.timings[i];
1174 newmode = drm_mode_std(connector, edid, std,
1177 drm_mode_probed_add(connector, newmode);
1185 * add_standard_modes - get std. modes from EDID and add them
1186 * @edid: EDID block to scan
1188 * Standard modes can be calculated using the appropriate standard (DMT,
1189 * GTF or CVT. Grab them from @edid and add them to the list.
1192 add_standard_modes(struct drm_connector *connector, struct edid *edid)
1195 struct detailed_mode_closure closure = {
1196 connector, edid, 0, 0, 0
1199 for (i = 0; i < EDID_STD_TIMINGS; i++) {
1200 struct drm_display_mode *newmode;
1202 newmode = drm_mode_std(connector, edid,
1203 &edid->standard_timings[i],
1206 drm_mode_probed_add(connector, newmode);
1211 if (version_greater(edid, 1, 0))
1212 drm_for_each_detailed_block((u8 *)edid, do_standard_modes,
1215 /* XXX should also look for standard codes in VTB blocks */
1217 return modes + closure.modes;
1220 static int drm_cvt_modes(struct drm_connector *connector,
1221 struct detailed_timing *timing)
1223 int i, j, modes = 0;
1224 struct drm_display_mode *newmode;
1225 struct drm_device *dev = connector->dev;
1226 struct cvt_timing *cvt;
1227 const int rates[] = { 60, 85, 75, 60, 50 };
1228 const u8 empty[3] = { 0, 0, 0 };
1230 for (i = 0; i < 4; i++) {
1231 int uninitialized_var(width), height;
1232 cvt = &(timing->data.other_data.data.cvt[i]);
1234 if (!memcmp(cvt->code, empty, 3))
1237 height = (cvt->code[0] + ((cvt->code[1] & 0xf0) << 4) + 1) * 2;
1238 switch (cvt->code[1] & 0x0c) {
1240 width = height * 4 / 3;
1243 width = height * 16 / 9;
1246 width = height * 16 / 10;
1249 width = height * 15 / 9;
1253 for (j = 1; j < 5; j++) {
1254 if (cvt->code[2] & (1 << j)) {
1255 newmode = drm_cvt_mode(dev, width, height,
1259 drm_mode_probed_add(connector, newmode);
1270 do_cvt_mode(struct detailed_timing *timing, void *c)
1272 struct detailed_mode_closure *closure = c;
1273 struct detailed_non_pixel *data = &timing->data.other_data;
1275 if (data->type == EDID_DETAIL_CVT_3BYTE)
1276 closure->modes += drm_cvt_modes(closure->connector, timing);
1280 add_cvt_modes(struct drm_connector *connector, struct edid *edid)
1282 struct detailed_mode_closure closure = {
1283 connector, edid, 0, 0, 0
1286 if (version_greater(edid, 1, 2))
1287 drm_for_each_detailed_block((u8 *)edid, do_cvt_mode, &closure);
1289 /* XXX should also look for CVT codes in VTB blocks */
1291 return closure.modes;
1295 do_detailed_mode(struct detailed_timing *timing, void *c)
1297 struct detailed_mode_closure *closure = c;
1298 struct drm_display_mode *newmode;
1300 if (timing->pixel_clock) {
1301 newmode = drm_mode_detailed(closure->connector->dev,
1302 closure->edid, timing,
1307 if (closure->preferred)
1308 newmode->type |= DRM_MODE_TYPE_PREFERRED;
1310 drm_mode_probed_add(closure->connector, newmode);
1312 closure->preferred = 0;
1317 * add_detailed_modes - Add modes from detailed timings
1318 * @connector: attached connector
1319 * @edid: EDID block to scan
1320 * @quirks: quirks to apply
1323 add_detailed_modes(struct drm_connector *connector, struct edid *edid,
1326 struct detailed_mode_closure closure = {
1334 if (closure.preferred && !version_greater(edid, 1, 3))
1336 (edid->features & DRM_EDID_FEATURE_PREFERRED_TIMING);
1338 drm_for_each_detailed_block((u8 *)edid, do_detailed_mode, &closure);
1340 return closure.modes;
1343 #define HDMI_IDENTIFIER 0x000C03
1344 #define AUDIO_BLOCK 0x01
1345 #define VENDOR_BLOCK 0x03
1346 #define SPEAKER_BLOCK 0x04
1347 #define EDID_BASIC_AUDIO (1 << 6)
1350 * Search EDID for CEA extension block.
1352 u8 *drm_find_cea_extension(struct edid *edid)
1354 u8 *edid_ext = NULL;
1357 /* No EDID or EDID extensions */
1358 if (edid == NULL || edid->extensions == 0)
1361 /* Find CEA extension */
1362 for (i = 0; i < edid->extensions; i++) {
1363 edid_ext = (u8 *)edid + EDID_LENGTH * (i + 1);
1364 if (edid_ext[0] == CEA_EXT)
1368 if (i == edid->extensions)
1373 EXPORT_SYMBOL(drm_find_cea_extension);
1376 parse_hdmi_vsdb(struct drm_connector *connector, uint8_t *db)
1378 connector->eld[5] |= (db[6] >> 7) << 1; /* Supports_AI */
1380 connector->dvi_dual = db[6] & 1;
1381 connector->max_tmds_clock = db[7] * 5;
1383 connector->latency_present[0] = db[8] >> 7;
1384 connector->latency_present[1] = (db[8] >> 6) & 1;
1385 connector->video_latency[0] = db[9];
1386 connector->audio_latency[0] = db[10];
1387 connector->video_latency[1] = db[11];
1388 connector->audio_latency[1] = db[12];
1390 DRM_LOG_KMS("HDMI: DVI dual %d, "
1391 "max TMDS clock %d, "
1392 "latency present %d %d, "
1393 "video latency %d %d, "
1394 "audio latency %d %d\n",
1395 connector->dvi_dual,
1396 connector->max_tmds_clock,
1397 (int) connector->latency_present[0],
1398 (int) connector->latency_present[1],
1399 connector->video_latency[0],
1400 connector->video_latency[1],
1401 connector->audio_latency[0],
1402 connector->audio_latency[1]);
1406 monitor_name(struct detailed_timing *t, void *data)
1408 if (t->data.other_data.type == EDID_DETAIL_MONITOR_NAME)
1409 *(u8 **)data = t->data.other_data.data.str.str;
1413 * drm_edid_to_eld - build ELD from EDID
1414 * @connector: connector corresponding to the HDMI/DP sink
1415 * @edid: EDID to parse
1417 * Fill the ELD (EDID-Like Data) buffer for passing to the audio driver.
1418 * Some ELD fields are left to the graphics driver caller:
1423 void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
1425 uint8_t *eld = connector->eld;
1433 memset(eld, 0, sizeof(connector->eld));
1435 cea = drm_find_cea_extension(edid);
1437 DRM_DEBUG_KMS("ELD: no CEA Extension found\n");
1442 drm_for_each_detailed_block((u8 *)edid, monitor_name, &name);
1443 for (mnl = 0; name && mnl < 13; mnl++) {
1444 if (name[mnl] == 0x0a)
1446 eld[20 + mnl] = name[mnl];
1448 eld[4] = (cea[1] << 5) | mnl;
1449 DRM_DEBUG_KMS("ELD monitor %s\n", eld + 20);
1451 eld[0] = 2 << 3; /* ELD version: 2 */
1453 eld[16] = edid->mfg_id[0];
1454 eld[17] = edid->mfg_id[1];
1455 eld[18] = edid->prod_code[0];
1456 eld[19] = edid->prod_code[1];
1458 for (db = cea + 4; db < cea + cea[2]; db += dbl + 1) {
1461 switch ((db[0] & 0xe0) >> 5) {
1462 case AUDIO_BLOCK: /* Audio Data Block, contains SADs */
1463 sad_count = dbl / 3;
1464 memcpy(eld + 20 + mnl, &db[1], dbl);
1466 case SPEAKER_BLOCK: /* Speaker Allocation Data Block */
1470 /* HDMI Vendor-Specific Data Block */
1471 if (db[1] == 0x03 && db[2] == 0x0c && db[3] == 0)
1472 parse_hdmi_vsdb(connector, db);
1478 eld[5] |= sad_count << 4;
1479 eld[2] = (20 + mnl + sad_count * 3 + 3) / 4;
1481 DRM_DEBUG_KMS("ELD size %d, SAD count %d\n", (int)eld[2], sad_count);
1483 EXPORT_SYMBOL(drm_edid_to_eld);
1486 * drm_av_sync_delay - HDMI/DP sink audio-video sync delay in millisecond
1487 * @connector: connector associated with the HDMI/DP sink
1488 * @mode: the display mode
1490 int drm_av_sync_delay(struct drm_connector *connector,
1491 struct drm_display_mode *mode)
1493 int i = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
1496 if (!connector->latency_present[0])
1498 if (!connector->latency_present[1])
1501 a = connector->audio_latency[i];
1502 v = connector->video_latency[i];
1505 * HDMI/DP sink doesn't support audio or video?
1507 if (a == 255 || v == 255)
1511 * Convert raw EDID values to millisecond.
1512 * Treat unknown latency as 0ms.
1515 a = min(2 * (a - 1), 500);
1517 v = min(2 * (v - 1), 500);
1519 return max(v - a, 0);
1521 EXPORT_SYMBOL(drm_av_sync_delay);
1524 * drm_select_eld - select one ELD from multiple HDMI/DP sinks
1525 * @encoder: the encoder just changed display mode
1526 * @mode: the adjusted display mode
1528 * It's possible for one encoder to be associated with multiple HDMI/DP sinks.
1529 * The policy is now hard coded to simply use the first HDMI/DP sink's ELD.
1531 struct drm_connector *drm_select_eld(struct drm_encoder *encoder,
1532 struct drm_display_mode *mode)
1534 struct drm_connector *connector;
1535 struct drm_device *dev = encoder->dev;
1537 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
1538 if (connector->encoder == encoder && connector->eld[0])
1543 EXPORT_SYMBOL(drm_select_eld);
1546 * drm_detect_hdmi_monitor - detect whether monitor is hdmi.
1547 * @edid: monitor EDID information
1549 * Parse the CEA extension according to CEA-861-B.
1550 * Return true if HDMI, false if not or unknown.
1552 bool drm_detect_hdmi_monitor(struct edid *edid)
1556 int start_offset, end_offset;
1557 bool is_hdmi = false;
1559 edid_ext = drm_find_cea_extension(edid);
1563 /* Data block offset in CEA extension block */
1565 end_offset = edid_ext[2];
1568 * Because HDMI identifier is in Vendor Specific Block,
1569 * search it from all data blocks of CEA extension.
1571 for (i = start_offset; i < end_offset;
1572 /* Increased by data block len */
1573 i += ((edid_ext[i] & 0x1f) + 1)) {
1574 /* Find vendor specific block */
1575 if ((edid_ext[i] >> 5) == VENDOR_BLOCK) {
1576 hdmi_id = edid_ext[i + 1] | (edid_ext[i + 2] << 8) |
1577 edid_ext[i + 3] << 16;
1578 /* Find HDMI identifier */
1579 if (hdmi_id == HDMI_IDENTIFIER)
1588 EXPORT_SYMBOL(drm_detect_hdmi_monitor);
1591 * drm_detect_monitor_audio - check monitor audio capability
1593 * Monitor should have CEA extension block.
1594 * If monitor has 'basic audio', but no CEA audio blocks, it's 'basic
1595 * audio' only. If there is any audio extension block and supported
1596 * audio format, assume at least 'basic audio' support, even if 'basic
1597 * audio' is not defined in EDID.
1600 bool drm_detect_monitor_audio(struct edid *edid)
1604 bool has_audio = false;
1605 int start_offset, end_offset;
1607 edid_ext = drm_find_cea_extension(edid);
1611 has_audio = ((edid_ext[3] & EDID_BASIC_AUDIO) != 0);
1614 DRM_DEBUG_KMS("Monitor has basic audio support\n");
1618 /* Data block offset in CEA extension block */
1620 end_offset = edid_ext[2];
1622 for (i = start_offset; i < end_offset;
1623 i += ((edid_ext[i] & 0x1f) + 1)) {
1624 if ((edid_ext[i] >> 5) == AUDIO_BLOCK) {
1626 for (j = 1; j < (edid_ext[i] & 0x1f); j += 3)
1627 DRM_DEBUG_KMS("CEA audio format %d\n",
1628 (edid_ext[i + j] >> 3) & 0xf);
1635 EXPORT_SYMBOL(drm_detect_monitor_audio);
1638 * drm_add_display_info - pull display info out if present
1640 * @info: display info (attached to connector)
1642 * Grab any available display info and stuff it into the drm_display_info
1643 * structure that's part of the connector. Useful for tracking bpp and
1646 static void drm_add_display_info(struct edid *edid,
1647 struct drm_display_info *info)
1651 info->width_mm = edid->width_cm * 10;
1652 info->height_mm = edid->height_cm * 10;
1654 /* driver figures it out in this case */
1656 info->color_formats = 0;
1658 /* Only defined for 1.4 with digital displays */
1659 if (edid->revision < 4)
1662 if (!(edid->input & DRM_EDID_INPUT_DIGITAL))
1665 switch (edid->input & DRM_EDID_DIGITAL_DEPTH_MASK) {
1666 case DRM_EDID_DIGITAL_DEPTH_6:
1669 case DRM_EDID_DIGITAL_DEPTH_8:
1672 case DRM_EDID_DIGITAL_DEPTH_10:
1675 case DRM_EDID_DIGITAL_DEPTH_12:
1678 case DRM_EDID_DIGITAL_DEPTH_14:
1681 case DRM_EDID_DIGITAL_DEPTH_16:
1684 case DRM_EDID_DIGITAL_DEPTH_UNDEF:
1690 info->color_formats = DRM_COLOR_FORMAT_RGB444;
1691 if (info->color_formats & DRM_EDID_FEATURE_RGB_YCRCB444)
1692 info->color_formats = DRM_COLOR_FORMAT_YCRCB444;
1693 if (info->color_formats & DRM_EDID_FEATURE_RGB_YCRCB422)
1694 info->color_formats = DRM_COLOR_FORMAT_YCRCB422;
1696 /* Get data from CEA blocks if present */
1697 edid_ext = drm_find_cea_extension(edid);
1701 info->cea_rev = edid_ext[1];
1705 * drm_add_edid_modes - add modes from EDID data, if available
1706 * @connector: connector we're probing
1709 * Add the specified modes to the connector's mode list.
1711 * Return number of modes added or 0 if we couldn't find any.
1713 int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid)
1721 if (!drm_edid_is_valid(edid)) {
1722 dev_warn(connector->dev->dev, "%s: EDID invalid.\n",
1723 drm_get_connector_name(connector));
1727 quirks = edid_get_quirks(edid);
1730 * EDID spec says modes should be preferred in this order:
1731 * - preferred detailed mode
1732 * - other detailed modes from base block
1733 * - detailed modes from extension blocks
1734 * - CVT 3-byte code modes
1735 * - standard timing codes
1736 * - established timing codes
1737 * - modes inferred from GTF or CVT range information
1739 * We get this pretty much right.
1741 * XXX order for additional mode types in extension blocks?
1743 num_modes += add_detailed_modes(connector, edid, quirks);
1744 num_modes += add_cvt_modes(connector, edid);
1745 num_modes += add_standard_modes(connector, edid);
1746 num_modes += add_established_modes(connector, edid);
1747 if (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF)
1748 num_modes += add_inferred_modes(connector, edid);
1750 if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75))
1751 edid_fixup_preferred(connector, quirks);
1753 drm_add_display_info(edid, &connector->display_info);
1757 EXPORT_SYMBOL(drm_add_edid_modes);
1760 * drm_add_modes_noedid - add modes for the connectors without EDID
1761 * @connector: connector we're probing
1762 * @hdisplay: the horizontal display limit
1763 * @vdisplay: the vertical display limit
1765 * Add the specified modes to the connector's mode list. Only when the
1766 * hdisplay/vdisplay is not beyond the given limit, it will be added.
1768 * Return number of modes added or 0 if we couldn't find any.
1770 int drm_add_modes_noedid(struct drm_connector *connector,
1771 int hdisplay, int vdisplay)
1773 int i, count, num_modes = 0;
1774 struct drm_display_mode *mode;
1775 struct drm_device *dev = connector->dev;
1777 count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
1783 for (i = 0; i < count; i++) {
1784 const struct drm_display_mode *ptr = &drm_dmt_modes[i];
1785 if (hdisplay && vdisplay) {
1787 * Only when two are valid, they will be used to check
1788 * whether the mode should be added to the mode list of
1791 if (ptr->hdisplay > hdisplay ||
1792 ptr->vdisplay > vdisplay)
1795 if (drm_mode_vrefresh(ptr) > 61)
1797 mode = drm_mode_duplicate(dev, ptr);
1799 drm_mode_probed_add(connector, mode);
1805 EXPORT_SYMBOL(drm_add_modes_noedid);