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drm/edid: Add detailed block walk for VTB extensions

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Signed-off-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Adam Jackson 2010-08-03 14:38:18 -04:00 committed by Dave Airlie
parent 4d76a22134
commit cbba98f8f6
1 changed files with 16 additions and 0 deletions
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16
drivers/gpu/drm/drm_edid.c
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@ -711,6 +711,19 @@ cea_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure)
cb((struct detailed_timing *)(det_base + 18 * i), closure);
}
static void
vtb_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure)
{
unsigned int i, n = min((int)ext[0x02], 6);
u8 *det_base = ext + 5;
if (ext[0x01] != 1)
return; /* unknown version */
for (i = 0; i < n; i++)
cb((struct detailed_timing *)(det_base + 18 * i), closure);
}
static void
drm_for_each_detailed_block(u8 *raw_edid, detailed_cb *cb, void *closure)
{
@ -729,6 +742,9 @@ drm_for_each_detailed_block(u8 *raw_edid, detailed_cb *cb, void *closure)
case CEA_EXT:
cea_for_each_detailed_block(ext, cb, closure);
break;
case VTB_EXT:
vtb_for_each_detailed_block(ext, cb, closure);
break;
default:
break;
}