[PATCH 2/2] drm/edid: parse the list of additional 3D modes

[Thomas Wood <thomas.wood@xxxxxxxxx>]

Parse 2D_VIC_order_X and 3D_Structure_X from the list at the end of the
HDMI Vendor Specific Data Block.

Signed-off-by: Thomas Wood <thomas.wood@xxxxxxxxx>
---
 drivers/gpu/drm/drm_edid.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 1dd82cd..eb6b363 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -2808,6 +2808,56 @@ do_hdmi_vsdb_modes(struct drm_connector *connector, const u8 *db, u8 len,
 						     video_len, i);
 	}
 
+	if (hdmi_3d_len <= 4)
+		goto out;
+
+	offset += 4;
+
+	for (i = 0; i < (hdmi_3d_len - 4); i++) {
+		int vic_index;
+		struct drm_display_mode *newmode = NULL;
+		unsigned int newflag = 0;
+
+		if (((db[8 + offset + i] & 0x0f) > 7)
+		    && (i + 1 == hdmi_3d_len - 4))
+			break;
+
+		/* 2D_VIC_order_X */
+		vic_index = db[8 + offset + i] >> 4;
+
+		/* 3D_Structure_X */
+		switch (db[8 + offset + i] & 0x0f) {
+		case 0:
+			newflag = DRM_MODE_FLAG_3D_FRAME_PACKING;
+			break;
+		case 6:
+			newflag = DRM_MODE_FLAG_3D_TOP_AND_BOTTOM;
+			break;
+		case 8:
+			if ((db[9 + offset + i] >> 4) == 1)
+				newflag = DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF;
+			break;
+		}
+
+		if (newflag != 0) {
+			newmode = drm_display_mode_from_vic_index(connector,
+								  video_db,
+								  video_len,
+								  vic_index);
+
+			if (newmode) {
+				newmode->flags |= newflag;
+				drm_mode_probed_add(connector, newmode);
+				modes++;
+			}
+		}
+
+		if ((db[8 + offset + i] & 0x0f) > 7) {
+			/* Optional 3D_Detail_X and reserved */
+			i++;
+		}
+	}
+
 out:
 	return modes;
 }
-- 
1.8.4.2

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