[v3] OMAP3630: DSS2: Enable Pre-Multiplied Alpha Support

Commit Message

Nagarajan, Rajkumar June 17, 2010, 11:56 a.m. UTC

None

Patch

diff --git a/arch/arm/plat-omap/include/plat/display.h b/arch/arm/plat-omap/include/plat/display.h
index 1c529ce..187d8dd 100644
--- a/arch/arm/plat-omap/include/plat/display.h
+++ b/arch/arm/plat-omap/include/plat/display.h
@@ -299,6 +299,7 @@  struct omap_overlay_info {
 	u16 out_width;	/* if 0, out_width == width */
 	u16 out_height;	/* if 0, out_height == height */
 	u8 global_alpha;
+	u8 pre_mult_alpha;
 };
 
 struct omap_overlay {
diff --git a/drivers/video/omap2/dss/dispc.c b/drivers/video/omap2/dss/dispc.c
index e777e35..5c03c2f 100644
--- a/drivers/video/omap2/dss/dispc.c
+++ b/drivers/video/omap2/dss/dispc.c
@@ -788,6 +788,11 @@  static void _dispc_set_vid_size(enum omap_plane plane, int width, int height)
 	dispc_write_reg(vsi_reg[plane-1], val);
 }
 
+static void _dispc_set_alpha_blend_attrs(enum omap_plane plane, bool enable)
+{
+	REG_FLD_MOD(dispc_reg_att[plane], enable ? 1 : 0, 28, 28);
+}
+
 static void _dispc_setup_global_alpha(enum omap_plane plane, u8 global_alpha)
 {
 
@@ -1520,7 +1525,8 @@  static int _dispc_setup_plane(enum omap_plane plane,
 		bool ilace,
 		enum omap_dss_rotation_type rotation_type,
 		u8 rotation, int mirror,
-		u8 global_alpha)
+		u8 global_alpha,
+		u8 pre_mult_alpha)
 {
 	const int maxdownscale = cpu_is_omap34xx() ? 4 : 2;
 	bool five_taps = 0;
@@ -1703,6 +1709,9 @@  static int _dispc_setup_plane(enum omap_plane plane,
 
 	_dispc_set_rotation_attrs(plane, rotation, mirror, color_mode);
 
+	if (cpu_is_omap3630() && (plane != OMAP_DSS_VIDEO1))
+		_dispc_set_alpha_blend_attrs(plane, pre_mult_alpha);
+
 	if (plane != OMAP_DSS_VIDEO1)
 		_dispc_setup_global_alpha(plane, global_alpha);
 
@@ -3151,7 +3160,8 @@  int dispc_setup_plane(enum omap_plane plane,
 		       enum omap_color_mode color_mode,
 		       bool ilace,
 		       enum omap_dss_rotation_type rotation_type,
-		       u8 rotation, bool mirror, u8 global_alpha)
+		       u8 rotation, bool mirror, u8 global_alpha,
+		       u8 pre_mult_alpha)
 {
 	int r = 0;
 
@@ -3173,7 +3183,8 @@  int dispc_setup_plane(enum omap_plane plane,
 			   color_mode, ilace,
 			   rotation_type,
 			   rotation, mirror,
-			   global_alpha);
+			   global_alpha,
+			   pre_mult_alpha);
 
 	enable_clocks(0);
 
diff --git a/drivers/video/omap2/dss/dss.h b/drivers/video/omap2/dss/dss.h
index 24326a5..5ae766a 100644
--- a/drivers/video/omap2/dss/dss.h
+++ b/drivers/video/omap2/dss/dss.h
@@ -320,7 +320,8 @@  int dispc_setup_plane(enum omap_plane plane,
 		      bool ilace,
 		      enum omap_dss_rotation_type rotation_type,
 		      u8 rotation, bool mirror,
-		      u8 global_alpha);
+		      u8 global_alpha,
+		      u8 pre_mult_alpha);
 
 bool dispc_go_busy(enum omap_channel channel);
 void dispc_go(enum omap_channel channel);
diff --git a/drivers/video/omap2/dss/manager.c b/drivers/video/omap2/dss/manager.c
index 32ec2ff..8800033 100644
--- a/drivers/video/omap2/dss/manager.c
+++ b/drivers/video/omap2/dss/manager.c
@@ -405,6 +405,7 @@  struct overlay_cache_data {
 	u16 out_width;	/* if 0, out_width == width */
 	u16 out_height;	/* if 0, out_height == height */
 	u8 global_alpha;
+	u8 pre_mult_alpha;
 
 	enum omap_channel channel;
 	bool replication;
@@ -816,7 +817,8 @@  static int configure_overlay(enum omap_plane plane)
 			c->rotation_type,
 			c->rotation,
 			c->mirror,
-			c->global_alpha);
+			c->global_alpha,
+			c->pre_mult_alpha);
 
 	if (r) {
 		/* this shouldn't happen */
@@ -1219,6 +1221,7 @@  static int omap_dss_mgr_apply(struct omap_overlay_manager *mgr)
 		oc->out_width = ovl->info.out_width;
 		oc->out_height = ovl->info.out_height;
 		oc->global_alpha = ovl->info.global_alpha;
+		oc->pre_mult_alpha = ovl->info.pre_mult_alpha;
 
 		oc->replication =
 			dss_use_replication(dssdev, ovl->info.color_mode);
diff --git a/drivers/video/omap2/dss/overlay.c b/drivers/video/omap2/dss/overlay.c
index 8233658..ce9c64b 100644
--- a/drivers/video/omap2/dss/overlay.c
+++ b/drivers/video/omap2/dss/overlay.c
@@ -255,6 +255,37 @@  static ssize_t overlay_global_alpha_store(struct omap_overlay *ovl,
 	return size;
 }
 
+static ssize_t overlay_pre_multiplication_alpha_show(struct omap_overlay *ovl,
+		char *buf)
+{
+	return snprintf(buf, PAGE_SIZE, "%d\n",
+			ovl->info.pre_mult_alpha);
+}
+
+static ssize_t overlay_pre_multiplication_alpha_store(struct omap_overlay *ovl,
+		const char *buf, size_t size)
+{
+	int r;
+	struct omap_overlay_info info;
+
+	ovl->get_overlay_info(ovl, &info);
+
+	/* only GFX and Video2 plane support pre alpha multiplication */
+	info.pre_mult_alpha = simple_strtoul(buf, NULL, 10);
+
+	r = ovl->set_overlay_info(ovl, &info);
+	if (r)
+		return r;
+
+	if (ovl->manager) {
+		r = ovl->manager->apply(ovl->manager);
+		if (r)
+			return r;
+	}
+
+	return size;
+}
+
 struct overlay_attribute {
 	struct attribute attr;
 	ssize_t (*show)(struct omap_overlay *, char *);
@@ -278,6 +309,9 @@  static OVERLAY_ATTR(enabled, S_IRUGO|S_IWUSR,
 		overlay_enabled_show, overlay_enabled_store);
 static OVERLAY_ATTR(global_alpha, S_IRUGO|S_IWUSR,
 		overlay_global_alpha_show, overlay_global_alpha_store);
+static OVERLAY_ATTR(pre_multiplication_alpha, S_IRUGO|S_IWUSR,
+		overlay_pre_multiplication_alpha_show,
+		overlay_pre_multiplication_alpha_store);
 
 static struct attribute *overlay_sysfs_attrs[] = {
 	&overlay_attr_name.attr,
@@ -288,6 +322,7 @@  static struct attribute *overlay_sysfs_attrs[] = {
 	&overlay_attr_output_size.attr,
 	&overlay_attr_enabled.attr,
 	&overlay_attr_global_alpha.attr,
+	&overlay_attr_pre_multiplication_alpha.attr,
 	NULL
 };