drm/omap: add format_is_yuv() helper

In a few places the dispc driver needs to know whether the pixel format
is an YUV format. Add a helper to figure that out.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

diff --git a/drivers/gpu/drm/omapdrm/dss/dispc.c b/drivers/gpu/drm/omapdrm/dss/dispc.c
index 5c4288f..ee87412 100644 (file)
--- a/drivers/gpu/drm/omapdrm/dss/dispc.c
+++ b/drivers/gpu/drm/omapdrm/dss/dispc.c
@@ -978,6 +978,18 @@ static void dispc_ovl_set_color_mode(enum omap_plane_id plane,
        REG_FLD_MOD(DISPC_OVL_ATTRIBUTES(plane), m, 4, 1);
 }
 
+static bool format_is_yuv(enum omap_color_mode color_mode)
+{
+       switch (color_mode) {
+       case OMAP_DSS_COLOR_YUV2:
+       case OMAP_DSS_COLOR_UYVY:
+       case OMAP_DSS_COLOR_NV12:
+               return true;
+       default:
+               return false;
+       }
+}
+
 static void dispc_ovl_configure_burst_type(enum omap_plane_id plane,
                enum omap_dss_rotation_type rotation_type)
 {
@@ -1703,9 +1715,8 @@ static void dispc_ovl_set_scaling_uv(enum omap_plane_id plane,
 
        if (!dss_has_feature(FEAT_HANDLE_UV_SEPARATE))
                return;
-       if ((color_mode != OMAP_DSS_COLOR_YUV2 &&
-                       color_mode != OMAP_DSS_COLOR_UYVY &&
-                       color_mode != OMAP_DSS_COLOR_NV12)) {
+
+       if (!format_is_yuv(color_mode)) {
                /* reset chroma resampling for RGB formats  */
                if (plane != OMAP_DSS_WB)
                        REG_FLD_MOD(DISPC_OVL_ATTRIBUTES2(plane), 0, 8, 8);
@@ -2384,19 +2395,9 @@ static int dispc_ovl_setup_common(enum omap_plane_id plane,
        if (paddr == 0 && rotation_type != OMAP_DSS_ROT_TILER)
                return -EINVAL;
 
-       switch (color_mode) {
-       case OMAP_DSS_COLOR_YUV2:
-       case OMAP_DSS_COLOR_UYVY:
-       case OMAP_DSS_COLOR_NV12:
-               if (in_width & 1) {
-                       DSSERR("input width %d is not even for YUV format\n",
-                               in_width);
-                       return -EINVAL;
-               }
-               break;
-
-       default:
-               break;
+       if (format_is_yuv(color_mode) && (in_width & 1)) {
+               DSSERR("input width %d is not even for YUV format\n", in_width);
+               return -EINVAL;
        }
 
        out_width = out_width == 0 ? width : out_width;
@@ -2433,26 +2434,15 @@ static int dispc_ovl_setup_common(enum omap_plane_id plane,
                DSSDBG("predecimation %d x %x, new input size %d x %d\n",
                        x_predecim, y_predecim, in_width, in_height);
 
-       switch (color_mode) {
-       case OMAP_DSS_COLOR_YUV2:
-       case OMAP_DSS_COLOR_UYVY:
-       case OMAP_DSS_COLOR_NV12:
-               if (in_width & 1) {
-                       DSSDBG("predecimated input width is not even for YUV format\n");
-                       DSSDBG("adjusting input width %d -> %d\n",
-                               in_width, in_width & ~1);
-
-                       in_width &= ~1;
-               }
-               break;
+       if (format_is_yuv(color_mode) && (in_width & 1)) {
+               DSSDBG("predecimated input width is not even for YUV format\n");
+               DSSDBG("adjusting input width %d -> %d\n",
+                       in_width, in_width & ~1);
 
-       default:
-               break;
+               in_width &= ~1;
        }
 
-       if (color_mode == OMAP_DSS_COLOR_YUV2 ||
-                       color_mode == OMAP_DSS_COLOR_UYVY ||
-                       color_mode == OMAP_DSS_COLOR_NV12)
+       if (format_is_yuv(color_mode))
                cconv = 1;
 
        if (ilace && !fieldmode) {