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drm: work around EDIDs with bad htotal/vtotal values

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We did this on the userspace side, but we need a similar fix for the
kernel.

Fixes LP #460664.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Jesse Barnes 2009-11-05 10:12:54 -08:00 committed by Dave Airlie
parent 0ebf17174b
commit 7064fef563
1 changed files with 6 additions and 0 deletions
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6
drivers/gpu/drm/drm_edid.c
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@ -662,6 +662,12 @@ static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev,
return NULL; return NULL;
} }
/* Some EDIDs have bogus h/vtotal values */
if (mode->hsync_end > mode->htotal)
mode->htotal = mode->hsync_end + 1;
if (mode->vsync_end > mode->vtotal)
mode->vtotal = mode->vsync_end + 1;
drm_mode_set_name(mode); drm_mode_set_name(mode);
if (pt->misc & DRM_EDID_PT_INTERLACED) if (pt->misc & DRM_EDID_PT_INTERLACED)