fixup! drm/apple: Support color transformation matrices

Signed-off-by: Janne Grunau <j@jannau.net>

Author: jannau

drivers/gpu/drm/apple/iomfb.h

@@ -368,10 +368,8 @@ struct iomfb_abort_swaps_dcp_resp {
 } __packed;
 
 struct iomfb_set_matrix_req {
-	u32 unk_u32; // maybe length?
-	u64 r[3];
-	u64 g[3];
-	u64 b[3];
+	u32 location;
+	u64 matrix[9];
 	u8 matrix_null;
 	u8 padding[3];
 } __packed;

drivers/gpu/drm/apple/iomfb_template.c

@@ -1407,20 +1407,11 @@ void DCP_FW_NAME(iomfb_flush)(struct apple_dcp *dcp, struct drm_crtc *crtc, stru
 	}
 
 	if (crtc_state->color_mgmt_changed && crtc_state->ctm) {
-		struct iomfb_set_matrix_req mat;
 		struct drm_color_ctm *ctm = (struct drm_color_ctm *)crtc_state->ctm->data;
-
-		mat.unk_u32 = 9;
-		mat.r[0] = ctm->matrix[0];
-		mat.r[1] = ctm->matrix[1];
-		mat.r[2] = ctm->matrix[2];
-		mat.g[0] = ctm->matrix[3];
-		mat.g[1] = ctm->matrix[4];
-		mat.g[2] = ctm->matrix[5];
-		mat.b[0] = ctm->matrix[6];
-		mat.b[1] = ctm->matrix[7];
-		mat.b[2] = ctm->matrix[8];
-
+		struct iomfb_set_matrix_req mat = {
+			.location = 9,
+		};
+		memcpy(mat.matrix, ctm->matrix, sizeof(mat.matrix));
 		iomfb_set_matrix(dcp, false, &mat, do_swap, NULL);
 	} else
 		do_swap(dcp, NULL, NULL);