2 * Copyright (c) 2006 Luc Verhaegen (quirks list)
3 * Copyright (c) 2007-2008 Intel Corporation
4 * Jesse Barnes <jesse.barnes@intel.com>
5 * Copyright 2010 Red Hat, Inc.
7 * DDC probing routines (drm_ddc_read & drm_do_probe_ddc_edid) originally from
9 * Copyright (C) 2006 Dennis Munsie <dmunsie@cecropia.com>
11 * Permission is hereby granted, free of charge, to any person obtaining a
12 * copy of this software and associated documentation files (the "Software"),
13 * to deal in the Software without restriction, including without limitation
14 * the rights to use, copy, modify, merge, publish, distribute, sub license,
15 * and/or sell copies of the Software, and to permit persons to whom the
16 * Software is furnished to do so, subject to the following conditions:
18 * The above copyright notice and this permission notice (including the
19 * next paragraph) shall be included in all copies or substantial portions
22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
23 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
24 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
25 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
26 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
27 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
28 * DEALINGS IN THE SOFTWARE.
30 #include <linux/kernel.h>
31 #include <linux/slab.h>
32 #include <linux/i2c.h>
33 #include <linux/export.h>
36 #include "drm_edid_modes.h"
38 #define version_greater(edid, maj, min) \
39 (((edid)->version > (maj)) || \
40 ((edid)->version == (maj) && (edid)->revision > (min)))
42 #define EDID_EST_TIMINGS 16
43 #define EDID_STD_TIMINGS 8
44 #define EDID_DETAILED_TIMINGS 4
47 * EDID blocks out in the wild have a variety of bugs, try to collect
48 * them here (note that userspace may work around broken monitors first,
49 * but fixes should make their way here so that the kernel "just works"
50 * on as many displays as possible).
53 /* First detailed mode wrong, use largest 60Hz mode */
54 #define EDID_QUIRK_PREFER_LARGE_60 (1 << 0)
55 /* Reported 135MHz pixel clock is too high, needs adjustment */
56 #define EDID_QUIRK_135_CLOCK_TOO_HIGH (1 << 1)
57 /* Prefer the largest mode at 75 Hz */
58 #define EDID_QUIRK_PREFER_LARGE_75 (1 << 2)
59 /* Detail timing is in cm not mm */
60 #define EDID_QUIRK_DETAILED_IN_CM (1 << 3)
61 /* Detailed timing descriptors have bogus size values, so just take the
62 * maximum size and use that.
64 #define EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE (1 << 4)
65 /* Monitor forgot to set the first detailed is preferred bit. */
66 #define EDID_QUIRK_FIRST_DETAILED_PREFERRED (1 << 5)
67 /* use +hsync +vsync for detailed mode */
68 #define EDID_QUIRK_DETAILED_SYNC_PP (1 << 6)
70 struct detailed_mode_closure {
71 struct drm_connector *connector;
83 static struct edid_quirk {
87 } edid_quirk_list[] = {
89 { "ACR", 44358, EDID_QUIRK_PREFER_LARGE_60 },
91 { "API", 0x7602, EDID_QUIRK_PREFER_LARGE_60 },
93 { "ACR", 2423, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
95 /* Belinea 10 15 55 */
96 { "MAX", 1516, EDID_QUIRK_PREFER_LARGE_60 },
97 { "MAX", 0x77e, EDID_QUIRK_PREFER_LARGE_60 },
99 /* Envision Peripherals, Inc. EN-7100e */
100 { "EPI", 59264, EDID_QUIRK_135_CLOCK_TOO_HIGH },
101 /* Envision EN2028 */
102 { "EPI", 8232, EDID_QUIRK_PREFER_LARGE_60 },
104 /* Funai Electronics PM36B */
105 { "FCM", 13600, EDID_QUIRK_PREFER_LARGE_75 |
106 EDID_QUIRK_DETAILED_IN_CM },
108 /* LG Philips LCD LP154W01-A5 */
109 { "LPL", 0, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
110 { "LPL", 0x2a00, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
112 /* Philips 107p5 CRT */
113 { "PHL", 57364, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
116 { "PTS", 765, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
118 /* Samsung SyncMaster 205BW. Note: irony */
119 { "SAM", 541, EDID_QUIRK_DETAILED_SYNC_PP },
120 /* Samsung SyncMaster 22[5-6]BW */
121 { "SAM", 596, EDID_QUIRK_PREFER_LARGE_60 },
122 { "SAM", 638, EDID_QUIRK_PREFER_LARGE_60 },
125 /*** DDC fetch and block validation ***/
127 static const u8 edid_header[] = {
128 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00
132 * Sanity check the header of the base EDID block. Return 8 if the header
133 * is perfect, down to 0 if it's totally wrong.
135 int drm_edid_header_is_valid(const u8 *raw_edid)
139 for (i = 0; i < sizeof(edid_header); i++)
140 if (raw_edid[i] == edid_header[i])
145 EXPORT_SYMBOL(drm_edid_header_is_valid);
149 * Sanity check the EDID block (base or extension). Return 0 if the block
150 * doesn't check out, or 1 if it's valid.
153 drm_edid_block_valid(u8 *raw_edid)
157 struct edid *edid = (struct edid *)raw_edid;
159 if (raw_edid[0] == 0x00) {
160 int score = drm_edid_header_is_valid(raw_edid);
162 else if (score >= 6) {
163 DRM_DEBUG("Fixing EDID header, your hardware may be failing\n");
164 memcpy(raw_edid, edid_header, sizeof(edid_header));
170 for (i = 0; i < EDID_LENGTH; i++)
173 DRM_ERROR("EDID checksum is invalid, remainder is %d\n", csum);
175 /* allow CEA to slide through, switches mangle this */
176 if (raw_edid[0] != 0x02)
180 /* per-block-type checks */
181 switch (raw_edid[0]) {
183 if (edid->version != 1) {
184 DRM_ERROR("EDID has major version %d, instead of 1\n", edid->version);
188 if (edid->revision > 4)
189 DRM_DEBUG("EDID minor > 4, assuming backward compatibility\n");
200 printk(KERN_ERR "Raw EDID:\n");
201 print_hex_dump(KERN_ERR, " \t", DUMP_PREFIX_NONE, 16, 1,
202 raw_edid, EDID_LENGTH, false);
208 * drm_edid_is_valid - sanity check EDID data
211 * Sanity-check an entire EDID record (including extensions)
213 bool drm_edid_is_valid(struct edid *edid)
216 u8 *raw = (u8 *)edid;
221 for (i = 0; i <= edid->extensions; i++)
222 if (!drm_edid_block_valid(raw + i * EDID_LENGTH))
227 EXPORT_SYMBOL(drm_edid_is_valid);
229 #define DDC_ADDR 0x50
230 #define DDC_SEGMENT_ADDR 0x30
232 * Get EDID information via I2C.
234 * \param adapter : i2c device adaptor
235 * \param buf : EDID data buffer to be filled
236 * \param len : EDID data buffer length
237 * \return 0 on success or -1 on failure.
239 * Try to fetch EDID information by calling i2c driver function.
242 drm_do_probe_ddc_edid(struct i2c_adapter *adapter, unsigned char *buf,
245 unsigned char start = block * EDID_LENGTH;
246 int ret, retries = 5;
248 /* The core i2c driver will automatically retry the transfer if the
249 * adapter reports EAGAIN. However, we find that bit-banging transfers
250 * are susceptible to errors under a heavily loaded machine and
251 * generate spurious NAKs and timeouts. Retrying the transfer
252 * of the individual block a few times seems to overcome this.
255 struct i2c_msg msgs[] = {
268 ret = i2c_transfer(adapter, msgs, 2);
269 } while (ret != 2 && --retries);
271 return ret == 2 ? 0 : -1;
274 static bool drm_edid_is_zero(u8 *in_edid, int length)
277 u32 *raw_edid = (u32 *)in_edid;
279 for (i = 0; i < length / 4; i++)
280 if (*(raw_edid + i) != 0)
286 drm_do_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter)
288 int i, j = 0, valid_extensions = 0;
291 if ((block = kmalloc(EDID_LENGTH, GFP_KERNEL)) == NULL)
294 /* base block fetch */
295 for (i = 0; i < 4; i++) {
296 if (drm_do_probe_ddc_edid(adapter, block, 0, EDID_LENGTH))
298 if (drm_edid_block_valid(block))
300 if (i == 0 && drm_edid_is_zero(block, EDID_LENGTH)) {
301 connector->null_edid_counter++;
308 /* if there's no extensions, we're done */
309 if (block[0x7e] == 0)
312 new = krealloc(block, (block[0x7e] + 1) * EDID_LENGTH, GFP_KERNEL);
317 for (j = 1; j <= block[0x7e]; j++) {
318 for (i = 0; i < 4; i++) {
319 if (drm_do_probe_ddc_edid(adapter,
320 block + (valid_extensions + 1) * EDID_LENGTH,
323 if (drm_edid_block_valid(block + (valid_extensions + 1) * EDID_LENGTH)) {
329 dev_warn(connector->dev->dev,
330 "%s: Ignoring invalid EDID block %d.\n",
331 drm_get_connector_name(connector), j);
334 if (valid_extensions != block[0x7e]) {
335 block[EDID_LENGTH-1] += block[0x7e] - valid_extensions;
336 block[0x7e] = valid_extensions;
337 new = krealloc(block, (valid_extensions + 1) * EDID_LENGTH, GFP_KERNEL);
346 dev_warn(connector->dev->dev, "%s: EDID block %d invalid.\n",
347 drm_get_connector_name(connector), j);
355 * Probe DDC presence.
357 * \param adapter : i2c device adaptor
358 * \return 1 on success
361 drm_probe_ddc(struct i2c_adapter *adapter)
365 return (drm_do_probe_ddc_edid(adapter, &out, 0, 1) == 0);
369 * drm_get_edid - get EDID data, if available
370 * @connector: connector we're probing
371 * @adapter: i2c adapter to use for DDC
373 * Poke the given i2c channel to grab EDID data if possible. If found,
374 * attach it to the connector.
376 * Return edid data or NULL if we couldn't find any.
378 struct edid *drm_get_edid(struct drm_connector *connector,
379 struct i2c_adapter *adapter)
381 struct edid *edid = NULL;
383 if (drm_probe_ddc(adapter))
384 edid = (struct edid *)drm_do_get_edid(connector, adapter);
386 connector->display_info.raw_edid = (char *)edid;
391 EXPORT_SYMBOL(drm_get_edid);
393 /*** EDID parsing ***/
396 * edid_vendor - match a string against EDID's obfuscated vendor field
397 * @edid: EDID to match
398 * @vendor: vendor string
400 * Returns true if @vendor is in @edid, false otherwise
402 static bool edid_vendor(struct edid *edid, char *vendor)
406 edid_vendor[0] = ((edid->mfg_id[0] & 0x7c) >> 2) + '@';
407 edid_vendor[1] = (((edid->mfg_id[0] & 0x3) << 3) |
408 ((edid->mfg_id[1] & 0xe0) >> 5)) + '@';
409 edid_vendor[2] = (edid->mfg_id[1] & 0x1f) + '@';
411 return !strncmp(edid_vendor, vendor, 3);
415 * edid_get_quirks - return quirk flags for a given EDID
416 * @edid: EDID to process
418 * This tells subsequent routines what fixes they need to apply.
420 static u32 edid_get_quirks(struct edid *edid)
422 struct edid_quirk *quirk;
425 for (i = 0; i < ARRAY_SIZE(edid_quirk_list); i++) {
426 quirk = &edid_quirk_list[i];
428 if (edid_vendor(edid, quirk->vendor) &&
429 (EDID_PRODUCT_ID(edid) == quirk->product_id))
430 return quirk->quirks;
436 #define MODE_SIZE(m) ((m)->hdisplay * (m)->vdisplay)
437 #define MODE_REFRESH_DIFF(m,r) (abs((m)->vrefresh - target_refresh))
440 * edid_fixup_preferred - set preferred modes based on quirk list
441 * @connector: has mode list to fix up
442 * @quirks: quirks list
444 * Walk the mode list for @connector, clearing the preferred status
445 * on existing modes and setting it anew for the right mode ala @quirks.
447 static void edid_fixup_preferred(struct drm_connector *connector,
450 struct drm_display_mode *t, *cur_mode, *preferred_mode;
451 int target_refresh = 0;
453 if (list_empty(&connector->probed_modes))
456 if (quirks & EDID_QUIRK_PREFER_LARGE_60)
458 if (quirks & EDID_QUIRK_PREFER_LARGE_75)
461 preferred_mode = list_first_entry(&connector->probed_modes,
462 struct drm_display_mode, head);
464 list_for_each_entry_safe(cur_mode, t, &connector->probed_modes, head) {
465 cur_mode->type &= ~DRM_MODE_TYPE_PREFERRED;
467 if (cur_mode == preferred_mode)
470 /* Largest mode is preferred */
471 if (MODE_SIZE(cur_mode) > MODE_SIZE(preferred_mode))
472 preferred_mode = cur_mode;
474 /* At a given size, try to get closest to target refresh */
475 if ((MODE_SIZE(cur_mode) == MODE_SIZE(preferred_mode)) &&
476 MODE_REFRESH_DIFF(cur_mode, target_refresh) <
477 MODE_REFRESH_DIFF(preferred_mode, target_refresh)) {
478 preferred_mode = cur_mode;
482 preferred_mode->type |= DRM_MODE_TYPE_PREFERRED;
485 struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev,
486 int hsize, int vsize, int fresh)
488 struct drm_display_mode *mode = NULL;
491 for (i = 0; i < drm_num_dmt_modes; i++) {
492 const struct drm_display_mode *ptr = &drm_dmt_modes[i];
493 if (hsize == ptr->hdisplay &&
494 vsize == ptr->vdisplay &&
495 fresh == drm_mode_vrefresh(ptr)) {
496 /* get the expected default mode */
497 mode = drm_mode_duplicate(dev, ptr);
503 EXPORT_SYMBOL(drm_mode_find_dmt);
505 typedef void detailed_cb(struct detailed_timing *timing, void *closure);
508 cea_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure)
511 u8 rev = ext[0x01], d = ext[0x02];
512 u8 *det_base = ext + d;
519 /* have to infer how many blocks we have, check pixel clock */
520 for (i = 0; i < 6; i++)
521 if (det_base[18*i] || det_base[18*i+1])
526 n = min(ext[0x03] & 0x0f, 6);
530 for (i = 0; i < n; i++)
531 cb((struct detailed_timing *)(det_base + 18 * i), closure);
535 vtb_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure)
537 unsigned int i, n = min((int)ext[0x02], 6);
538 u8 *det_base = ext + 5;
541 return; /* unknown version */
543 for (i = 0; i < n; i++)
544 cb((struct detailed_timing *)(det_base + 18 * i), closure);
548 drm_for_each_detailed_block(u8 *raw_edid, detailed_cb *cb, void *closure)
551 struct edid *edid = (struct edid *)raw_edid;
556 for (i = 0; i < EDID_DETAILED_TIMINGS; i++)
557 cb(&(edid->detailed_timings[i]), closure);
559 for (i = 1; i <= raw_edid[0x7e]; i++) {
560 u8 *ext = raw_edid + (i * EDID_LENGTH);
563 cea_for_each_detailed_block(ext, cb, closure);
566 vtb_for_each_detailed_block(ext, cb, closure);
575 is_rb(struct detailed_timing *t, void *data)
578 if (r[3] == EDID_DETAIL_MONITOR_RANGE)
580 *(bool *)data = true;
583 /* EDID 1.4 defines this explicitly. For EDID 1.3, we guess, badly. */
585 drm_monitor_supports_rb(struct edid *edid)
587 if (edid->revision >= 4) {
589 drm_for_each_detailed_block((u8 *)edid, is_rb, &ret);
593 return ((edid->input & DRM_EDID_INPUT_DIGITAL) != 0);
597 find_gtf2(struct detailed_timing *t, void *data)
600 if (r[3] == EDID_DETAIL_MONITOR_RANGE && r[10] == 0x02)
604 /* Secondary GTF curve kicks in above some break frequency */
606 drm_gtf2_hbreak(struct edid *edid)
609 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
610 return r ? (r[12] * 2) : 0;
614 drm_gtf2_2c(struct edid *edid)
617 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
618 return r ? r[13] : 0;
622 drm_gtf2_m(struct edid *edid)
625 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
626 return r ? (r[15] << 8) + r[14] : 0;
630 drm_gtf2_k(struct edid *edid)
633 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
634 return r ? r[16] : 0;
638 drm_gtf2_2j(struct edid *edid)
641 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
642 return r ? r[17] : 0;
646 * standard_timing_level - get std. timing level(CVT/GTF/DMT)
647 * @edid: EDID block to scan
649 static int standard_timing_level(struct edid *edid)
651 if (edid->revision >= 2) {
652 if (edid->revision >= 4 && (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF))
654 if (drm_gtf2_hbreak(edid))
662 * 0 is reserved. The spec says 0x01 fill for unused timings. Some old
663 * monitors fill with ascii space (0x20) instead.
666 bad_std_timing(u8 a, u8 b)
668 return (a == 0x00 && b == 0x00) ||
669 (a == 0x01 && b == 0x01) ||
670 (a == 0x20 && b == 0x20);
674 * drm_mode_std - convert standard mode info (width, height, refresh) into mode
675 * @t: standard timing params
676 * @timing_level: standard timing level
678 * Take the standard timing params (in this case width, aspect, and refresh)
679 * and convert them into a real mode using CVT/GTF/DMT.
681 static struct drm_display_mode *
682 drm_mode_std(struct drm_connector *connector, struct edid *edid,
683 struct std_timing *t, int revision)
685 struct drm_device *dev = connector->dev;
686 struct drm_display_mode *m, *mode = NULL;
689 unsigned aspect_ratio = (t->vfreq_aspect & EDID_TIMING_ASPECT_MASK)
690 >> EDID_TIMING_ASPECT_SHIFT;
691 unsigned vfreq = (t->vfreq_aspect & EDID_TIMING_VFREQ_MASK)
692 >> EDID_TIMING_VFREQ_SHIFT;
693 int timing_level = standard_timing_level(edid);
695 if (bad_std_timing(t->hsize, t->vfreq_aspect))
698 /* According to the EDID spec, the hdisplay = hsize * 8 + 248 */
699 hsize = t->hsize * 8 + 248;
700 /* vrefresh_rate = vfreq + 60 */
701 vrefresh_rate = vfreq + 60;
702 /* the vdisplay is calculated based on the aspect ratio */
703 if (aspect_ratio == 0) {
707 vsize = (hsize * 10) / 16;
708 } else if (aspect_ratio == 1)
709 vsize = (hsize * 3) / 4;
710 else if (aspect_ratio == 2)
711 vsize = (hsize * 4) / 5;
713 vsize = (hsize * 9) / 16;
715 /* HDTV hack, part 1 */
716 if (vrefresh_rate == 60 &&
717 ((hsize == 1360 && vsize == 765) ||
718 (hsize == 1368 && vsize == 769))) {
724 * If this connector already has a mode for this size and refresh
725 * rate (because it came from detailed or CVT info), use that
726 * instead. This way we don't have to guess at interlace or
729 list_for_each_entry(m, &connector->probed_modes, head)
730 if (m->hdisplay == hsize && m->vdisplay == vsize &&
731 drm_mode_vrefresh(m) == vrefresh_rate)
734 /* HDTV hack, part 2 */
735 if (hsize == 1366 && vsize == 768 && vrefresh_rate == 60) {
736 mode = drm_cvt_mode(dev, 1366, 768, vrefresh_rate, 0, 0,
738 mode->hdisplay = 1366;
739 mode->hsync_start = mode->hsync_start - 1;
740 mode->hsync_end = mode->hsync_end - 1;
744 /* check whether it can be found in default mode table */
745 mode = drm_mode_find_dmt(dev, hsize, vsize, vrefresh_rate);
749 switch (timing_level) {
753 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
757 * This is potentially wrong if there's ever a monitor with
758 * more than one ranges section, each claiming a different
759 * secondary GTF curve. Please don't do that.
761 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
762 if (drm_mode_hsync(mode) > drm_gtf2_hbreak(edid)) {
764 mode = drm_gtf_mode_complex(dev, hsize, vsize,
773 mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0,
781 * EDID is delightfully ambiguous about how interlaced modes are to be
782 * encoded. Our internal representation is of frame height, but some
783 * HDTV detailed timings are encoded as field height.
785 * The format list here is from CEA, in frame size. Technically we
786 * should be checking refresh rate too. Whatever.
789 drm_mode_do_interlace_quirk(struct drm_display_mode *mode,
790 struct detailed_pixel_timing *pt)
793 static const struct {
795 } cea_interlaced[] = {
805 if (!(pt->misc & DRM_EDID_PT_INTERLACED))
808 for (i = 0; i < ARRAY_SIZE(cea_interlaced); i++) {
809 if ((mode->hdisplay == cea_interlaced[i].w) &&
810 (mode->vdisplay == cea_interlaced[i].h / 2)) {
812 mode->vsync_start *= 2;
813 mode->vsync_end *= 2;
819 mode->flags |= DRM_MODE_FLAG_INTERLACE;
823 * drm_mode_detailed - create a new mode from an EDID detailed timing section
824 * @dev: DRM device (needed to create new mode)
826 * @timing: EDID detailed timing info
827 * @quirks: quirks to apply
829 * An EDID detailed timing block contains enough info for us to create and
830 * return a new struct drm_display_mode.
832 static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev,
834 struct detailed_timing *timing,
837 struct drm_display_mode *mode;
838 struct detailed_pixel_timing *pt = &timing->data.pixel_data;
839 unsigned hactive = (pt->hactive_hblank_hi & 0xf0) << 4 | pt->hactive_lo;
840 unsigned vactive = (pt->vactive_vblank_hi & 0xf0) << 4 | pt->vactive_lo;
841 unsigned hblank = (pt->hactive_hblank_hi & 0xf) << 8 | pt->hblank_lo;
842 unsigned vblank = (pt->vactive_vblank_hi & 0xf) << 8 | pt->vblank_lo;
843 unsigned hsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc0) << 2 | pt->hsync_offset_lo;
844 unsigned hsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x30) << 4 | pt->hsync_pulse_width_lo;
845 unsigned vsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc) >> 2 | pt->vsync_offset_pulse_width_lo >> 4;
846 unsigned vsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x3) << 4 | (pt->vsync_offset_pulse_width_lo & 0xf);
848 /* ignore tiny modes */
849 if (hactive < 64 || vactive < 64)
852 if (pt->misc & DRM_EDID_PT_STEREO) {
853 printk(KERN_WARNING "stereo mode not supported\n");
856 if (!(pt->misc & DRM_EDID_PT_SEPARATE_SYNC)) {
857 printk(KERN_WARNING "composite sync not supported\n");
860 /* it is incorrect if hsync/vsync width is zero */
861 if (!hsync_pulse_width || !vsync_pulse_width) {
862 DRM_DEBUG_KMS("Incorrect Detailed timing. "
863 "Wrong Hsync/Vsync pulse width\n");
866 mode = drm_mode_create(dev);
870 mode->type = DRM_MODE_TYPE_DRIVER;
872 if (quirks & EDID_QUIRK_135_CLOCK_TOO_HIGH)
873 timing->pixel_clock = cpu_to_le16(1088);
875 mode->clock = le16_to_cpu(timing->pixel_clock) * 10;
877 mode->hdisplay = hactive;
878 mode->hsync_start = mode->hdisplay + hsync_offset;
879 mode->hsync_end = mode->hsync_start + hsync_pulse_width;
880 mode->htotal = mode->hdisplay + hblank;
882 mode->vdisplay = vactive;
883 mode->vsync_start = mode->vdisplay + vsync_offset;
884 mode->vsync_end = mode->vsync_start + vsync_pulse_width;
885 mode->vtotal = mode->vdisplay + vblank;
887 /* Some EDIDs have bogus h/vtotal values */
888 if (mode->hsync_end > mode->htotal)
889 mode->htotal = mode->hsync_end + 1;
890 if (mode->vsync_end > mode->vtotal)
891 mode->vtotal = mode->vsync_end + 1;
893 drm_mode_do_interlace_quirk(mode, pt);
895 drm_mode_set_name(mode);
897 if (quirks & EDID_QUIRK_DETAILED_SYNC_PP) {
898 pt->misc |= DRM_EDID_PT_HSYNC_POSITIVE | DRM_EDID_PT_VSYNC_POSITIVE;
901 mode->flags |= (pt->misc & DRM_EDID_PT_HSYNC_POSITIVE) ?
902 DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC;
903 mode->flags |= (pt->misc & DRM_EDID_PT_VSYNC_POSITIVE) ?
904 DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC;
906 mode->width_mm = pt->width_mm_lo | (pt->width_height_mm_hi & 0xf0) << 4;
907 mode->height_mm = pt->height_mm_lo | (pt->width_height_mm_hi & 0xf) << 8;
909 if (quirks & EDID_QUIRK_DETAILED_IN_CM) {
910 mode->width_mm *= 10;
911 mode->height_mm *= 10;
914 if (quirks & EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE) {
915 mode->width_mm = edid->width_cm * 10;
916 mode->height_mm = edid->height_cm * 10;
923 mode_is_rb(const struct drm_display_mode *mode)
925 return (mode->htotal - mode->hdisplay == 160) &&
926 (mode->hsync_end - mode->hdisplay == 80) &&
927 (mode->hsync_end - mode->hsync_start == 32) &&
928 (mode->vsync_start - mode->vdisplay == 3);
932 mode_in_hsync_range(const struct drm_display_mode *mode,
933 struct edid *edid, u8 *t)
935 int hsync, hmin, hmax;
938 if (edid->revision >= 4)
939 hmin += ((t[4] & 0x04) ? 255 : 0);
941 if (edid->revision >= 4)
942 hmax += ((t[4] & 0x08) ? 255 : 0);
943 hsync = drm_mode_hsync(mode);
945 return (hsync <= hmax && hsync >= hmin);
949 mode_in_vsync_range(const struct drm_display_mode *mode,
950 struct edid *edid, u8 *t)
952 int vsync, vmin, vmax;
955 if (edid->revision >= 4)
956 vmin += ((t[4] & 0x01) ? 255 : 0);
958 if (edid->revision >= 4)
959 vmax += ((t[4] & 0x02) ? 255 : 0);
960 vsync = drm_mode_vrefresh(mode);
962 return (vsync <= vmax && vsync >= vmin);
966 range_pixel_clock(struct edid *edid, u8 *t)
969 if (t[9] == 0 || t[9] == 255)
972 /* 1.4 with CVT support gives us real precision, yay */
973 if (edid->revision >= 4 && t[10] == 0x04)
974 return (t[9] * 10000) - ((t[12] >> 2) * 250);
976 /* 1.3 is pathetic, so fuzz up a bit */
977 return t[9] * 10000 + 5001;
981 mode_in_range(const struct drm_display_mode *mode, struct edid *edid,
982 struct detailed_timing *timing)
985 u8 *t = (u8 *)timing;
987 if (!mode_in_hsync_range(mode, edid, t))
990 if (!mode_in_vsync_range(mode, edid, t))
993 if ((max_clock = range_pixel_clock(edid, t)))
994 if (mode->clock > max_clock)
997 /* 1.4 max horizontal check */
998 if (edid->revision >= 4 && t[10] == 0x04)
999 if (t[13] && mode->hdisplay > 8 * (t[13] + (256 * (t[12]&0x3))))
1002 if (mode_is_rb(mode) && !drm_monitor_supports_rb(edid))
1009 * XXX If drm_dmt_modes ever regrows the CVT-R modes (and it will) this will
1010 * need to account for them.
1013 drm_gtf_modes_for_range(struct drm_connector *connector, struct edid *edid,
1014 struct detailed_timing *timing)
1017 struct drm_display_mode *newmode;
1018 struct drm_device *dev = connector->dev;
1020 for (i = 0; i < drm_num_dmt_modes; i++) {
1021 if (mode_in_range(drm_dmt_modes + i, edid, timing)) {
1022 newmode = drm_mode_duplicate(dev, &drm_dmt_modes[i]);
1024 drm_mode_probed_add(connector, newmode);
1034 do_inferred_modes(struct detailed_timing *timing, void *c)
1036 struct detailed_mode_closure *closure = c;
1037 struct detailed_non_pixel *data = &timing->data.other_data;
1038 int gtf = (closure->edid->features & DRM_EDID_FEATURE_DEFAULT_GTF);
1040 if (gtf && data->type == EDID_DETAIL_MONITOR_RANGE)
1041 closure->modes += drm_gtf_modes_for_range(closure->connector,
1047 add_inferred_modes(struct drm_connector *connector, struct edid *edid)
1049 struct detailed_mode_closure closure = {
1050 connector, edid, 0, 0, 0
1053 if (version_greater(edid, 1, 0))
1054 drm_for_each_detailed_block((u8 *)edid, do_inferred_modes,
1057 return closure.modes;
1061 drm_est3_modes(struct drm_connector *connector, struct detailed_timing *timing)
1063 int i, j, m, modes = 0;
1064 struct drm_display_mode *mode;
1065 u8 *est = ((u8 *)timing) + 5;
1067 for (i = 0; i < 6; i++) {
1068 for (j = 7; j > 0; j--) {
1069 m = (i * 8) + (7 - j);
1070 if (m >= ARRAY_SIZE(est3_modes))
1072 if (est[i] & (1 << j)) {
1073 mode = drm_mode_find_dmt(connector->dev,
1077 /*, est3_modes[m].rb */);
1079 drm_mode_probed_add(connector, mode);
1090 do_established_modes(struct detailed_timing *timing, void *c)
1092 struct detailed_mode_closure *closure = c;
1093 struct detailed_non_pixel *data = &timing->data.other_data;
1095 if (data->type == EDID_DETAIL_EST_TIMINGS)
1096 closure->modes += drm_est3_modes(closure->connector, timing);
1100 * add_established_modes - get est. modes from EDID and add them
1101 * @edid: EDID block to scan
1103 * Each EDID block contains a bitmap of the supported "established modes" list
1104 * (defined above). Tease them out and add them to the global modes list.
1107 add_established_modes(struct drm_connector *connector, struct edid *edid)
1109 struct drm_device *dev = connector->dev;
1110 unsigned long est_bits = edid->established_timings.t1 |
1111 (edid->established_timings.t2 << 8) |
1112 ((edid->established_timings.mfg_rsvd & 0x80) << 9);
1114 struct detailed_mode_closure closure = {
1115 connector, edid, 0, 0, 0
1118 for (i = 0; i <= EDID_EST_TIMINGS; i++) {
1119 if (est_bits & (1<<i)) {
1120 struct drm_display_mode *newmode;
1121 newmode = drm_mode_duplicate(dev, &edid_est_modes[i]);
1123 drm_mode_probed_add(connector, newmode);
1129 if (version_greater(edid, 1, 0))
1130 drm_for_each_detailed_block((u8 *)edid,
1131 do_established_modes, &closure);
1133 return modes + closure.modes;
1137 do_standard_modes(struct detailed_timing *timing, void *c)
1139 struct detailed_mode_closure *closure = c;
1140 struct detailed_non_pixel *data = &timing->data.other_data;
1141 struct drm_connector *connector = closure->connector;
1142 struct edid *edid = closure->edid;
1144 if (data->type == EDID_DETAIL_STD_MODES) {
1146 for (i = 0; i < 6; i++) {
1147 struct std_timing *std;
1148 struct drm_display_mode *newmode;
1150 std = &data->data.timings[i];
1151 newmode = drm_mode_std(connector, edid, std,
1154 drm_mode_probed_add(connector, newmode);
1162 * add_standard_modes - get std. modes from EDID and add them
1163 * @edid: EDID block to scan
1165 * Standard modes can be calculated using the appropriate standard (DMT,
1166 * GTF or CVT. Grab them from @edid and add them to the list.
1169 add_standard_modes(struct drm_connector *connector, struct edid *edid)
1172 struct detailed_mode_closure closure = {
1173 connector, edid, 0, 0, 0
1176 for (i = 0; i < EDID_STD_TIMINGS; i++) {
1177 struct drm_display_mode *newmode;
1179 newmode = drm_mode_std(connector, edid,
1180 &edid->standard_timings[i],
1183 drm_mode_probed_add(connector, newmode);
1188 if (version_greater(edid, 1, 0))
1189 drm_for_each_detailed_block((u8 *)edid, do_standard_modes,
1192 /* XXX should also look for standard codes in VTB blocks */
1194 return modes + closure.modes;
1197 static int drm_cvt_modes(struct drm_connector *connector,
1198 struct detailed_timing *timing)
1200 int i, j, modes = 0;
1201 struct drm_display_mode *newmode;
1202 struct drm_device *dev = connector->dev;
1203 struct cvt_timing *cvt;
1204 const int rates[] = { 60, 85, 75, 60, 50 };
1205 const u8 empty[3] = { 0, 0, 0 };
1207 for (i = 0; i < 4; i++) {
1208 int uninitialized_var(width), height;
1209 cvt = &(timing->data.other_data.data.cvt[i]);
1211 if (!memcmp(cvt->code, empty, 3))
1214 height = (cvt->code[0] + ((cvt->code[1] & 0xf0) << 4) + 1) * 2;
1215 switch (cvt->code[1] & 0x0c) {
1217 width = height * 4 / 3;
1220 width = height * 16 / 9;
1223 width = height * 16 / 10;
1226 width = height * 15 / 9;
1230 for (j = 1; j < 5; j++) {
1231 if (cvt->code[2] & (1 << j)) {
1232 newmode = drm_cvt_mode(dev, width, height,
1236 drm_mode_probed_add(connector, newmode);
1247 do_cvt_mode(struct detailed_timing *timing, void *c)
1249 struct detailed_mode_closure *closure = c;
1250 struct detailed_non_pixel *data = &timing->data.other_data;
1252 if (data->type == EDID_DETAIL_CVT_3BYTE)
1253 closure->modes += drm_cvt_modes(closure->connector, timing);
1257 add_cvt_modes(struct drm_connector *connector, struct edid *edid)
1259 struct detailed_mode_closure closure = {
1260 connector, edid, 0, 0, 0
1263 if (version_greater(edid, 1, 2))
1264 drm_for_each_detailed_block((u8 *)edid, do_cvt_mode, &closure);
1266 /* XXX should also look for CVT codes in VTB blocks */
1268 return closure.modes;
1272 do_detailed_mode(struct detailed_timing *timing, void *c)
1274 struct detailed_mode_closure *closure = c;
1275 struct drm_display_mode *newmode;
1277 if (timing->pixel_clock) {
1278 newmode = drm_mode_detailed(closure->connector->dev,
1279 closure->edid, timing,
1284 if (closure->preferred)
1285 newmode->type |= DRM_MODE_TYPE_PREFERRED;
1287 drm_mode_probed_add(closure->connector, newmode);
1289 closure->preferred = 0;
1294 * add_detailed_modes - Add modes from detailed timings
1295 * @connector: attached connector
1296 * @edid: EDID block to scan
1297 * @quirks: quirks to apply
1300 add_detailed_modes(struct drm_connector *connector, struct edid *edid,
1303 struct detailed_mode_closure closure = {
1311 if (closure.preferred && !version_greater(edid, 1, 3))
1313 (edid->features & DRM_EDID_FEATURE_PREFERRED_TIMING);
1315 drm_for_each_detailed_block((u8 *)edid, do_detailed_mode, &closure);
1317 return closure.modes;
1320 #define HDMI_IDENTIFIER 0x000C03
1321 #define AUDIO_BLOCK 0x01
1322 #define VENDOR_BLOCK 0x03
1323 #define SPEAKER_BLOCK 0x04
1324 #define EDID_BASIC_AUDIO (1 << 6)
1327 * Search EDID for CEA extension block.
1329 u8 *drm_find_cea_extension(struct edid *edid)
1331 u8 *edid_ext = NULL;
1334 /* No EDID or EDID extensions */
1335 if (edid == NULL || edid->extensions == 0)
1338 /* Find CEA extension */
1339 for (i = 0; i < edid->extensions; i++) {
1340 edid_ext = (u8 *)edid + EDID_LENGTH * (i + 1);
1341 if (edid_ext[0] == CEA_EXT)
1345 if (i == edid->extensions)
1350 EXPORT_SYMBOL(drm_find_cea_extension);
1353 parse_hdmi_vsdb(struct drm_connector *connector, uint8_t *db)
1355 connector->eld[5] |= (db[6] >> 7) << 1; /* Supports_AI */
1357 connector->dvi_dual = db[6] & 1;
1358 connector->max_tmds_clock = db[7] * 5;
1360 connector->latency_present[0] = db[8] >> 7;
1361 connector->latency_present[1] = (db[8] >> 6) & 1;
1362 connector->video_latency[0] = db[9];
1363 connector->audio_latency[0] = db[10];
1364 connector->video_latency[1] = db[11];
1365 connector->audio_latency[1] = db[12];
1367 DRM_LOG_KMS("HDMI: DVI dual %d, "
1368 "max TMDS clock %d, "
1369 "latency present %d %d, "
1370 "video latency %d %d, "
1371 "audio latency %d %d\n",
1372 connector->dvi_dual,
1373 connector->max_tmds_clock,
1374 (int) connector->latency_present[0],
1375 (int) connector->latency_present[1],
1376 connector->video_latency[0],
1377 connector->video_latency[1],
1378 connector->audio_latency[0],
1379 connector->audio_latency[1]);
1383 monitor_name(struct detailed_timing *t, void *data)
1385 if (t->data.other_data.type == EDID_DETAIL_MONITOR_NAME)
1386 *(u8 **)data = t->data.other_data.data.str.str;
1390 * drm_edid_to_eld - build ELD from EDID
1391 * @connector: connector corresponding to the HDMI/DP sink
1392 * @edid: EDID to parse
1394 * Fill the ELD (EDID-Like Data) buffer for passing to the audio driver.
1395 * Some ELD fields are left to the graphics driver caller:
1400 void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
1402 uint8_t *eld = connector->eld;
1410 memset(eld, 0, sizeof(connector->eld));
1412 cea = drm_find_cea_extension(edid);
1414 DRM_DEBUG_KMS("ELD: no CEA Extension found\n");
1419 drm_for_each_detailed_block((u8 *)edid, monitor_name, &name);
1420 for (mnl = 0; name && mnl < 13; mnl++) {
1421 if (name[mnl] == 0x0a)
1423 eld[20 + mnl] = name[mnl];
1425 eld[4] = (cea[1] << 5) | mnl;
1426 DRM_DEBUG_KMS("ELD monitor %s\n", eld + 20);
1428 eld[0] = 2 << 3; /* ELD version: 2 */
1430 eld[16] = edid->mfg_id[0];
1431 eld[17] = edid->mfg_id[1];
1432 eld[18] = edid->prod_code[0];
1433 eld[19] = edid->prod_code[1];
1435 for (db = cea + 4; db < cea + cea[2]; db += dbl + 1) {
1438 switch ((db[0] & 0xe0) >> 5) {
1439 case AUDIO_BLOCK: /* Audio Data Block, contains SADs */
1440 sad_count = dbl / 3;
1441 memcpy(eld + 20 + mnl, &db[1], dbl);
1443 case SPEAKER_BLOCK: /* Speaker Allocation Data Block */
1447 /* HDMI Vendor-Specific Data Block */
1448 if (db[1] == 0x03 && db[2] == 0x0c && db[3] == 0)
1449 parse_hdmi_vsdb(connector, db);
1455 eld[5] |= sad_count << 4;
1456 eld[2] = (20 + mnl + sad_count * 3 + 3) / 4;
1458 DRM_DEBUG_KMS("ELD size %d, SAD count %d\n", (int)eld[2], sad_count);
1460 EXPORT_SYMBOL(drm_edid_to_eld);
1463 * drm_av_sync_delay - HDMI/DP sink audio-video sync delay in millisecond
1464 * @connector: connector associated with the HDMI/DP sink
1465 * @mode: the display mode
1467 int drm_av_sync_delay(struct drm_connector *connector,
1468 struct drm_display_mode *mode)
1470 int i = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
1473 if (!connector->latency_present[0])
1475 if (!connector->latency_present[1])
1478 a = connector->audio_latency[i];
1479 v = connector->video_latency[i];
1482 * HDMI/DP sink doesn't support audio or video?
1484 if (a == 255 || v == 255)
1488 * Convert raw EDID values to millisecond.
1489 * Treat unknown latency as 0ms.
1492 a = min(2 * (a - 1), 500);
1494 v = min(2 * (v - 1), 500);
1496 return max(v - a, 0);
1498 EXPORT_SYMBOL(drm_av_sync_delay);
1501 * drm_select_eld - select one ELD from multiple HDMI/DP sinks
1502 * @encoder: the encoder just changed display mode
1503 * @mode: the adjusted display mode
1505 * It's possible for one encoder to be associated with multiple HDMI/DP sinks.
1506 * The policy is now hard coded to simply use the first HDMI/DP sink's ELD.
1508 struct drm_connector *drm_select_eld(struct drm_encoder *encoder,
1509 struct drm_display_mode *mode)
1511 struct drm_connector *connector;
1512 struct drm_device *dev = encoder->dev;
1514 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
1515 if (connector->encoder == encoder && connector->eld[0])
1520 EXPORT_SYMBOL(drm_select_eld);
1523 * drm_detect_hdmi_monitor - detect whether monitor is hdmi.
1524 * @edid: monitor EDID information
1526 * Parse the CEA extension according to CEA-861-B.
1527 * Return true if HDMI, false if not or unknown.
1529 bool drm_detect_hdmi_monitor(struct edid *edid)
1533 int start_offset, end_offset;
1534 bool is_hdmi = false;
1536 edid_ext = drm_find_cea_extension(edid);
1540 /* Data block offset in CEA extension block */
1542 end_offset = edid_ext[2];
1545 * Because HDMI identifier is in Vendor Specific Block,
1546 * search it from all data blocks of CEA extension.
1548 for (i = start_offset; i < end_offset;
1549 /* Increased by data block len */
1550 i += ((edid_ext[i] & 0x1f) + 1)) {
1551 /* Find vendor specific block */
1552 if ((edid_ext[i] >> 5) == VENDOR_BLOCK) {
1553 hdmi_id = edid_ext[i + 1] | (edid_ext[i + 2] << 8) |
1554 edid_ext[i + 3] << 16;
1555 /* Find HDMI identifier */
1556 if (hdmi_id == HDMI_IDENTIFIER)
1565 EXPORT_SYMBOL(drm_detect_hdmi_monitor);
1568 * drm_detect_monitor_audio - check monitor audio capability
1570 * Monitor should have CEA extension block.
1571 * If monitor has 'basic audio', but no CEA audio blocks, it's 'basic
1572 * audio' only. If there is any audio extension block and supported
1573 * audio format, assume at least 'basic audio' support, even if 'basic
1574 * audio' is not defined in EDID.
1577 bool drm_detect_monitor_audio(struct edid *edid)
1581 bool has_audio = false;
1582 int start_offset, end_offset;
1584 edid_ext = drm_find_cea_extension(edid);
1588 has_audio = ((edid_ext[3] & EDID_BASIC_AUDIO) != 0);
1591 DRM_DEBUG_KMS("Monitor has basic audio support\n");
1595 /* Data block offset in CEA extension block */
1597 end_offset = edid_ext[2];
1599 for (i = start_offset; i < end_offset;
1600 i += ((edid_ext[i] & 0x1f) + 1)) {
1601 if ((edid_ext[i] >> 5) == AUDIO_BLOCK) {
1603 for (j = 1; j < (edid_ext[i] & 0x1f); j += 3)
1604 DRM_DEBUG_KMS("CEA audio format %d\n",
1605 (edid_ext[i + j] >> 3) & 0xf);
1612 EXPORT_SYMBOL(drm_detect_monitor_audio);
1615 * drm_add_display_info - pull display info out if present
1617 * @info: display info (attached to connector)
1619 * Grab any available display info and stuff it into the drm_display_info
1620 * structure that's part of the connector. Useful for tracking bpp and
1623 static void drm_add_display_info(struct edid *edid,
1624 struct drm_display_info *info)
1628 info->width_mm = edid->width_cm * 10;
1629 info->height_mm = edid->height_cm * 10;
1631 /* driver figures it out in this case */
1633 info->color_formats = 0;
1635 /* Only defined for 1.4 with digital displays */
1636 if (edid->revision < 4)
1639 if (!(edid->input & DRM_EDID_INPUT_DIGITAL))
1642 switch (edid->input & DRM_EDID_DIGITAL_DEPTH_MASK) {
1643 case DRM_EDID_DIGITAL_DEPTH_6:
1646 case DRM_EDID_DIGITAL_DEPTH_8:
1649 case DRM_EDID_DIGITAL_DEPTH_10:
1652 case DRM_EDID_DIGITAL_DEPTH_12:
1655 case DRM_EDID_DIGITAL_DEPTH_14:
1658 case DRM_EDID_DIGITAL_DEPTH_16:
1661 case DRM_EDID_DIGITAL_DEPTH_UNDEF:
1667 info->color_formats = DRM_COLOR_FORMAT_RGB444;
1668 if (info->color_formats & DRM_EDID_FEATURE_RGB_YCRCB444)
1669 info->color_formats = DRM_COLOR_FORMAT_YCRCB444;
1670 if (info->color_formats & DRM_EDID_FEATURE_RGB_YCRCB422)
1671 info->color_formats = DRM_COLOR_FORMAT_YCRCB422;
1673 /* Get data from CEA blocks if present */
1674 edid_ext = drm_find_cea_extension(edid);
1678 info->cea_rev = edid_ext[1];
1682 * drm_add_edid_modes - add modes from EDID data, if available
1683 * @connector: connector we're probing
1686 * Add the specified modes to the connector's mode list.
1688 * Return number of modes added or 0 if we couldn't find any.
1690 int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid)
1698 if (!drm_edid_is_valid(edid)) {
1699 dev_warn(connector->dev->dev, "%s: EDID invalid.\n",
1700 drm_get_connector_name(connector));
1704 quirks = edid_get_quirks(edid);
1707 * EDID spec says modes should be preferred in this order:
1708 * - preferred detailed mode
1709 * - other detailed modes from base block
1710 * - detailed modes from extension blocks
1711 * - CVT 3-byte code modes
1712 * - standard timing codes
1713 * - established timing codes
1714 * - modes inferred from GTF or CVT range information
1716 * We get this pretty much right.
1718 * XXX order for additional mode types in extension blocks?
1720 num_modes += add_detailed_modes(connector, edid, quirks);
1721 num_modes += add_cvt_modes(connector, edid);
1722 num_modes += add_standard_modes(connector, edid);
1723 num_modes += add_established_modes(connector, edid);
1724 num_modes += add_inferred_modes(connector, edid);
1726 if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75))
1727 edid_fixup_preferred(connector, quirks);
1729 drm_add_display_info(edid, &connector->display_info);
1733 EXPORT_SYMBOL(drm_add_edid_modes);
1736 * drm_add_modes_noedid - add modes for the connectors without EDID
1737 * @connector: connector we're probing
1738 * @hdisplay: the horizontal display limit
1739 * @vdisplay: the vertical display limit
1741 * Add the specified modes to the connector's mode list. Only when the
1742 * hdisplay/vdisplay is not beyond the given limit, it will be added.
1744 * Return number of modes added or 0 if we couldn't find any.
1746 int drm_add_modes_noedid(struct drm_connector *connector,
1747 int hdisplay, int vdisplay)
1749 int i, count, num_modes = 0;
1750 struct drm_display_mode *mode;
1751 struct drm_device *dev = connector->dev;
1753 count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
1759 for (i = 0; i < count; i++) {
1760 const struct drm_display_mode *ptr = &drm_dmt_modes[i];
1761 if (hdisplay && vdisplay) {
1763 * Only when two are valid, they will be used to check
1764 * whether the mode should be added to the mode list of
1767 if (ptr->hdisplay > hdisplay ||
1768 ptr->vdisplay > vdisplay)
1771 if (drm_mode_vrefresh(ptr) > 61)
1773 mode = drm_mode_duplicate(dev, ptr);
1775 drm_mode_probed_add(connector, mode);
1781 EXPORT_SYMBOL(drm_add_modes_noedid);