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drm/edid: Fix interlaced detailed timings to be frame size, not field. 

cf. https://bugzilla.redhat.com/show_bug.cgi?id=533561

Signed-off-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Adam Jackson 2010-02-15 22:15:39 +00:00 committed by Dave Airlie
parent f2d12b8e2c
commit b58db2c6dd
1 changed files with 45 additions and 2 deletions
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47
drivers/gpu/drm/drm_edid.c
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@ -598,6 +598,50 @@ struct drm_display_mode *drm_mode_std(struct drm_device *dev,
return mode;
}
/*
* EDID is delightfully ambiguous about how interlaced modes are to be
* encoded. Our internal representation is of frame height, but some
* HDTV detailed timings are encoded as field height.
*
* The format list here is from CEA, in frame size. Technically we
* should be checking refresh rate too. Whatever.
*/
static void
drm_mode_do_interlace_quirk(struct drm_display_mode *mode,
struct detailed_pixel_timing *pt)
{
int i;
static const struct {
int w, h;
} cea_interlaced[] = {
{ 1920, 1080 },
{ 720, 480 },
{ 1440, 480 },
{ 2880, 480 },
{ 720, 576 },
{ 1440, 576 },
{ 2880, 576 },
};
static const int n_sizes =
sizeof(cea_interlaced)/sizeof(cea_interlaced[0]);
if (!(pt->misc & DRM_EDID_PT_INTERLACED))
return;
for (i = 0; i < n_sizes; i++) {
if ((mode->hdisplay == cea_interlaced[i].w) &&
(mode->vdisplay == cea_interlaced[i].h / 2)) {
mode->vdisplay *= 2;
mode->vsync_start *= 2;
mode->vsync_end *= 2;
mode->vtotal *= 2;
mode->vtotal |= 1;
}
}
mode->flags |= DRM_MODE_FLAG_INTERLACE;
}
/**
* drm_mode_detailed - create a new mode from an EDID detailed timing section
* @dev: DRM device (needed to create new mode)
@ -680,8 +724,7 @@ static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev,
drm_mode_set_name(mode);
if (pt->misc & DRM_EDID_PT_INTERLACED)
mode->flags |= DRM_MODE_FLAG_INTERLACE;
drm_mode_do_interlace_quirk(mode, pt);
if (quirks & EDID_QUIRK_DETAILED_SYNC_PP) {
pt->misc |= DRM_EDID_PT_HSYNC_POSITIVE | DRM_EDID_PT_VSYNC_POSITIVE;