drm: fix the addition of the side-by-side (half) flag for extra 3D modes

Ensure the side-by-side (half) flag is added to any existing flags when
adding modes from 3D_Structure_ALL.

Signed-off-by: Thomas Wood <thomas.wood@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 381c698..0a1e4a5 100644 (file)
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -2701,7 +2701,7 @@ static int add_3d_struct_modes(struct drm_connector *connector, u16 structure,
        if (structure & (1 << 8)) {
                newmode = drm_mode_duplicate(dev, &edid_cea_modes[cea_mode]);
                if (newmode) {
-                       newmode->flags = DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF;
+                       newmode->flags |= DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF;
                        drm_mode_probed_add(connector, newmode);
                        modes++;
                }