From cbba98f8f651a763fe9fd167efa65cd7b1fa22d9 Mon Sep 17 00:00:00 2001
From: Adam Jackson <ajax@redhat.com>
Date: Tue, 3 Aug 2010 14:38:18 -0400
Subject: [PATCH] drm/edid: Add detailed block walk for VTB extensions
Signed-off-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
---
drivers/gpu/drm/drm_edid.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 30b286ba16c4..1bf81b91b70f 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -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;
}
--
2.20.1