drm/vc4: Use .pixel_order instead of custom .flip_cbcr

The hardware has enums for altering the Cr and Cb order,
so use this instead of having a flag which swaps the
order the pointers are presented to the hardware
(that only worked for 3 plane formats anyway).

Explicitly sets .pixel_order in each case, rather than
relying on then default XYCBCR order being a value 0.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/563872b69c1e5df142cb15ebfca7f20056b8a64c.1510841336.git.dave.stevenson@raspberrypi.org

drivers/gpu/drm/vc4/vc4_plane.c

@@ -86,7 +86,6 @@ static const struct hvs_format {
 	u32 hvs; /* HVS_FORMAT_* */
 	u32 pixel_order;
 	bool has_alpha;
-	bool flip_cbcr;
 } hvs_formats[] = {
 	{
 		.drm = DRM_FORMAT_XRGB8888, .hvs = HVS_PIXEL_FORMAT_RGBA8888,
@@ -131,28 +130,32 @@ static const struct hvs_format {
 	{
 		.drm = DRM_FORMAT_YUV422,
 		.hvs = HVS_PIXEL_FORMAT_YCBCR_YUV422_3PLANE,
+		.pixel_order = HVS_PIXEL_ORDER_XYCBCR,
 	},
 	{
 		.drm = DRM_FORMAT_YVU422,
 		.hvs = HVS_PIXEL_FORMAT_YCBCR_YUV422_3PLANE,
-		.flip_cbcr = true,
+		.pixel_order = HVS_PIXEL_ORDER_XYCRCB,
 	},
 	{
 		.drm = DRM_FORMAT_YUV420,
 		.hvs = HVS_PIXEL_FORMAT_YCBCR_YUV420_3PLANE,
+		.pixel_order = HVS_PIXEL_ORDER_XYCBCR,
 	},
 	{
 		.drm = DRM_FORMAT_YVU420,
 		.hvs = HVS_PIXEL_FORMAT_YCBCR_YUV420_3PLANE,
-		.flip_cbcr = true,
+		.pixel_order = HVS_PIXEL_ORDER_XYCRCB,
 	},
 	{
 		.drm = DRM_FORMAT_NV12,
 		.hvs = HVS_PIXEL_FORMAT_YCBCR_YUV420_2PLANE,
+		.pixel_order = HVS_PIXEL_ORDER_XYCBCR,
 	},
 	{
 		.drm = DRM_FORMAT_NV16,
 		.hvs = HVS_PIXEL_FORMAT_YCBCR_YUV422_2PLANE,
+		.pixel_order = HVS_PIXEL_ORDER_XYCBCR,
 	},
 };
 
@@ -625,15 +628,8 @@ static int vc4_plane_mode_set(struct drm_plane *plane,
 	 * The pointers may be any byte address.
 	 */
 	vc4_state->ptr0_offset = vc4_state->dlist_count;
-	if (!format->flip_cbcr) {
-		for (i = 0; i < num_planes; i++)
-			vc4_dlist_write(vc4_state, vc4_state->offsets[i]);
-	} else {
-		WARN_ON_ONCE(num_planes != 3);
-		vc4_dlist_write(vc4_state, vc4_state->offsets[0]);
-		vc4_dlist_write(vc4_state, vc4_state->offsets[2]);
-		vc4_dlist_write(vc4_state, vc4_state->offsets[1]);
-	}
+	for (i = 0; i < num_planes; i++)
+		vc4_dlist_write(vc4_state, vc4_state->offsets[i]);
 
 	/* Pointer Context Word 0/1/2: Written by the HVS */
 	for (i = 0; i < num_planes; i++)