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ddc: Port some paranoia from drm_edid.c 

Avoid adding a "standard" mode timing if we've already got a matching
detailed timing. To help with that, parse CEA blocks for detailed
timings before doing standard or established timings.

Signed-off-by: Adam Jackson <ajax@redhat.com>
This commit is contained in:
Adam Jackson 2017-11-14 15:33:54 -05:00
parent 652913cd94
commit 4ed8d5c946
1 changed files with 27 additions and 8 deletions
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35
hw/xfree86/modes/xf86EdidModes.c
View File

@ -462,21 +462,38 @@ FindDMTMode(int hsize, int vsize, int refresh, Bool rb)
* for modes in this section, but does say that CVT is preferred.
*/
static DisplayModePtr
DDCModesFromStandardTiming(struct std_timings *timing, ddc_quirk_t quirks,
DDCModesFromStandardTiming(DisplayModePtr pool, struct std_timings *timing,
ddc_quirk_t quirks,
int timing_level, Bool rb)
{
DisplayModePtr Modes = NULL, Mode = NULL;
int i, hsize, vsize, refresh;
for (i = 0; i < STD_TIMINGS; i++) {
DisplayModePtr p = NULL;
hsize = timing[i].hsize;
vsize = timing[i].vsize;
refresh = timing[i].refresh;
/* HDTV hack, because you can't say 1366 */
/* HDTV hack, part one */
if (refresh == 60 &&
((hsize == 1360 && vsize == 765) ||
(hsize == 1368 && vsize == 769))) {
hsize = 1366;
vsize = 768;
}
/* If we already have a detailed timing for this size, don't add more */
for (p = pool; p; p = p->next) {
if (p->HDisplay == hsize && p->VDisplay == vsize &&
refresh == round(xf86ModeVRefresh(p)))
break;
}
if (p)
continue;
/* HDTV hack, because you can't say 1366 */
if (refresh == 60 && hsize == 1366 && vsize == 768) {
Mode = xf86CVTMode(1366, 768, 60, FALSE, FALSE);
Mode->HDisplay = 1366;
Mode->HSyncStart--;
@ -1013,7 +1030,8 @@ handle_detailed_modes(struct detailed_monitor_section *det_mon, void *data)
p->Modes = xf86ModesAdd(p->Modes, Mode);
break;
case DS_STD_TIMINGS:
Mode = DDCModesFromStandardTiming(det_mon->section.std_t,
Mode = DDCModesFromStandardTiming(p->Modes,
det_mon->section.std_t,
p->quirks, p->timing_level, p->rb);
p->Modes = xf86ModesAdd(p->Modes, Mode);
break;
@ -1065,16 +1083,17 @@ xf86DDCGetModes(int scrnIndex, xf86MonPtr DDC)
xf86ForEachDetailedBlock(DDC, handle_detailed_modes, &p);
Modes = p.Modes;
/* Add cea-extension mode timings */
Mode = DDCModesFromCEAExtension(scrnIndex, DDC);
Modes = xf86ModesAdd(Modes, Mode);
/* Add established timings */
Mode = DDCModesFromEstablished(scrnIndex, &DDC->timings1, quirks);
Modes = xf86ModesAdd(Modes, Mode);
/* Add standard timings */
Mode = DDCModesFromStandardTiming(DDC->timings2, quirks, timing_level, rb);
Modes = xf86ModesAdd(Modes, Mode);
/* Add cea-extension mode timings */
Mode = DDCModesFromCEAExtension(scrnIndex, DDC);
Mode = DDCModesFromStandardTiming(Modes, DDC->timings2, quirks,
timing_level, rb);
Modes = xf86ModesAdd(Modes, Mode);
if (quirks & DDC_QUIRK_PREFER_LARGE_60)