[PATCH 3/7] drm/edid: Add detailed block walk for VTB extensions

[Adam Jackson <ajax@redhat.com>]

Signed-off-by: Adam Jackson <ajax@redhat.com>
---
 drivers/gpu/drm/drm_edid.c |   16 ++++++++++++++++
 1 files changed, 16 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 1bc15a8..9299dd6 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -712,6 +712,19 @@ cea_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *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)
 {
 	int i;
@@ -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;
 		}
-- 
1.7.2