OMAP: DSS2: Clean up DISPC color mode validation checks

The supported set of color modes varies for different DISPC pipelines(plane)
and omap version. This makes the checks for validation of a color mode more
complicated as new omap versions are added.

A dss_feature function is created which tells if a color_mode is supported
for a plane on the current omap revision.
Signed-off-by: Archit Taneja <archit@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

drivers/video/omap2/dss/dispc.c

@@ -1550,29 +1550,12 @@ static int _dispc_setup_plane(enum omap_plane plane,
 				height, pos_y, out_height);
 	}
 
-	if (plane == OMAP_DSS_GFX) {
-		if (width != out_width || height != out_height)
+	if (!dss_feat_color_mode_supported(plane, color_mode))
 		return -EINVAL;
 
-		switch (color_mode) {
-		case OMAP_DSS_COLOR_ARGB16:
-		case OMAP_DSS_COLOR_ARGB32:
-		case OMAP_DSS_COLOR_RGBA32:
-			if (!dss_has_feature(FEAT_GLOBAL_ALPHA))
-				return -EINVAL;
-		case OMAP_DSS_COLOR_RGBX32:
-			if (cpu_is_omap24xx())
-				return -EINVAL;
-			/* fall through */
-		case OMAP_DSS_COLOR_RGB12U:
-		case OMAP_DSS_COLOR_RGB16:
-		case OMAP_DSS_COLOR_RGB24P:
-		case OMAP_DSS_COLOR_RGB24U:
-			break;
-
-		default:
+	if (plane == OMAP_DSS_GFX) {
+		if (width != out_width || height != out_height)
 			return -EINVAL;
-		}
 	} else {
 		/* video plane */
 
@@ -1586,35 +1569,9 @@ static int _dispc_setup_plane(enum omap_plane plane,
 		   out_height > height * 8)
 			return -EINVAL;
 
-		switch (color_mode) {
-		case OMAP_DSS_COLOR_RGBX32:
-		case OMAP_DSS_COLOR_RGB12U:
-			if (cpu_is_omap24xx())
-				return -EINVAL;
-			/* fall through */
-		case OMAP_DSS_COLOR_RGB16:
-		case OMAP_DSS_COLOR_RGB24P:
-		case OMAP_DSS_COLOR_RGB24U:
-			break;
-
-		case OMAP_DSS_COLOR_ARGB16:
-		case OMAP_DSS_COLOR_ARGB32:
-		case OMAP_DSS_COLOR_RGBA32:
-			if (!dss_has_feature(FEAT_GLOBAL_ALPHA))
-				return -EINVAL;
-			if (!dss_has_feature(FEAT_GLOBAL_ALPHA_VID1) &&
-					plane == OMAP_DSS_VIDEO1)
-				return -EINVAL;
-			break;
-
-		case OMAP_DSS_COLOR_YUV2:
-		case OMAP_DSS_COLOR_UYVY:
+		if (color_mode == OMAP_DSS_COLOR_YUV2 ||
+			color_mode == OMAP_DSS_COLOR_UYVY)
 			cconv = 1;
-			break;
-
-		default:
-			return -EINVAL;
-		}
 
 		/* Must use 5-tap filter? */
 		five_taps = height > out_height * 2;

drivers/video/omap2/dss/dss_features.c

@@ -179,6 +179,13 @@ enum omap_color_mode dss_feat_get_supported_color_modes(enum omap_plane plane)
 	return omap_current_dss_features->supported_color_modes[plane];
 }
 
+bool dss_feat_color_mode_supported(enum omap_plane plane,
+		enum omap_color_mode color_mode)
+{
+	return omap_current_dss_features->supported_color_modes[plane] &
+			color_mode;
+}
+
 /* DSS has_feature check */
 bool dss_has_feature(enum dss_feat_id id)
 {

drivers/video/omap2/dss/dss_features.h

@@ -44,6 +44,8 @@ int dss_feat_get_num_mgrs(void);
 int dss_feat_get_num_ovls(void);
 enum omap_display_type dss_feat_get_supported_displays(enum omap_channel channel);
 enum omap_color_mode dss_feat_get_supported_color_modes(enum omap_plane plane);
+bool dss_feat_color_mode_supported(enum omap_plane plane,
+		enum omap_color_mode color_mode);
 
 bool dss_has_feature(enum dss_feat_id id);
 void dss_feat_get_reg_field(enum dss_feat_reg_field id, u8 *start, u8 *end);