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add quirk to find the native resolution on certain Iiyama monitors 

tested by MOCHIDA Shuji
This commit is contained in:
macallan 2018-07-10 01:44:30 +00:00
parent 8d19d392bf
commit dbccb46040
1 changed files with 21 additions and 7 deletions
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28
sys/dev/videomode/edid.c
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@ -1,4 +1,4 @@
/* $NetBSD: edid.c,v 1.13 2014/11/17 00:46:04 jmcneill Exp $ */
/* $NetBSD: edid.c,v 1.14 2018/07/10 01:44:30 macallan Exp $ */
/*-
* Copyright (c) 2006 Itronix Inc.
@ -32,7 +32,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: edid.c,v 1.13 2014/11/17 00:46:04 jmcneill Exp $");
__KERNEL_RCSID(0, "$NetBSD: edid.c,v 1.14 2018/07/10 01:44:30 macallan Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -420,6 +420,22 @@ edid_det_timing(uint8_t *data, struct videomode *vmp)
return 1;
}
static void bump_preferred_mode(struct edid_info *edid, struct videomode *m)
{
/*
* XXX
* Iiyama 4800 series monitors may have their native resolution in the
* 2nd detailed timing descriptor instead of the 1st. Try to detect
* that here and pick the native mode anyway.
*/
if (edid->edid_preferred_mode == NULL) {
edid->edid_preferred_mode = m;
} else if ((strncmp(edid->edid_vendor, "IVM", 3) == 0) &&
(edid->edid_product == 0x4800) &&
(edid->edid_preferred_mode->dot_clock < m->dot_clock))
edid->edid_preferred_mode = m;
}
static void
edid_block(struct edid_info *edid, uint8_t *data)
{
@ -433,13 +449,11 @@ edid_block(struct edid_info *edid, uint8_t *data)
exist_mode = edid_search_mode(edid, &mode);
if (exist_mode != NULL) {
*exist_mode = mode;
if (edid->edid_preferred_mode == NULL)
edid->edid_preferred_mode = exist_mode;
bump_preferred_mode(edid, exist_mode);
} else {
edid->edid_modes[edid->edid_nmodes] = mode;
if (edid->edid_preferred_mode == NULL)
edid->edid_preferred_mode =
&edid->edid_modes[edid->edid_nmodes];
bump_preferred_mode(edid,
&edid->edid_modes[edid->edid_nmodes]);
edid->edid_nmodes++;
}
return;