3 files changed, 97 insertions, 0 deletions

diff --git a/drivers/video/omap2/dss/dispc.c b/drivers/video/omap2/dss/dispc.c
index fa7aadfec7b..6892cfd2e3b 100644
--- a/drivers/video/omap2/dss/dispc.c
+++ b/drivers/video/omap2/dss/dispc.c
@@ -739,6 +739,27 @@ static void dispc_ovl_set_vid_size(enum omap_plane plane, int width, int height)
         dispc_write_reg(DISPC_OVL_SIZE(plane), val);
 }
 
+static void dispc_ovl_set_zorder(enum omap_plane plane, u8 zorder)
+{
+        struct omap_overlay *ovl = omap_dss_get_overlay(plane);
+
+        if ((ovl->caps & OMAP_DSS_OVL_CAP_ZORDER) == 0)
+                return;
+
+        REG_FLD_MOD(DISPC_OVL_ATTRIBUTES(plane), zorder, 27, 26);
+}
+
+static void dispc_ovl_enable_zorder_planes(void)
+{
+        int i;
+
+        if (!dss_has_feature(FEAT_ALPHA_FREE_ZORDER))
+                return;
+
+        for (i = 0; i < dss_feat_get_num_ovls(); i++)
+                REG_FLD_MOD(DISPC_OVL_ATTRIBUTES(i), 1, 25, 25);
+}
+
 static void dispc_ovl_set_pre_mult_alpha(enum omap_plane plane, bool enable)
 {
         struct omap_overlay *ovl = omap_dss_get_overlay(plane);
@@ -1866,6 +1887,7 @@ int dispc_ovl_setup(enum omap_plane plane, struct omap_overlay_info *oi,
         dispc_ovl_set_rotation_attrs(plane, oi->rotation, oi->mirror,
                         oi->color_mode);
 
+        dispc_ovl_set_zorder(plane, oi->zorder);
         dispc_ovl_set_pre_mult_alpha(plane, oi->pre_mult_alpha);
         dispc_ovl_setup_global_alpha(plane, oi->global_alpha);
 
@@ -3317,6 +3339,8 @@ static void _omap_dispc_initial_config(void)
         dispc_read_plane_fifo_sizes();
 
         dispc_configure_burst_sizes();
+
+        dispc_ovl_enable_zorder_planes();
 }
 
 /* DISPC HW IP initialisation */
diff --git a/drivers/video/omap2/dss/overlay.c b/drivers/video/omap2/dss/overlay.c
index 11d21e3347a..ab8e40e4875 100644
--- a/drivers/video/omap2/dss/overlay.c
+++ b/drivers/video/omap2/dss/overlay.c
@@ -311,6 +311,42 @@ static ssize_t overlay_pre_mult_alpha_store(struct omap_overlay *ovl,
         return size;
 }
 
+static ssize_t overlay_zorder_show(struct omap_overlay *ovl, char *buf)
+{
+        return snprintf(buf, PAGE_SIZE, "%d\n", ovl->info.zorder);
+}
+
+static ssize_t overlay_zorder_store(struct omap_overlay *ovl,
+                const char *buf, size_t size)
+{
+        int r;
+        u8 zorder;
+        struct omap_overlay_info info;
+
+        if ((ovl->caps & OMAP_DSS_OVL_CAP_ZORDER) == 0)
+                return -ENODEV;
+
+        r = kstrtou8(buf, 0, &zorder);
+        if (r)
+                return r;
+
+        ovl->get_overlay_info(ovl, &info);
+
+        info.zorder = zorder;
+
+        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 *);
@@ -337,6 +373,8 @@ static OVERLAY_ATTR(global_alpha, S_IRUGO|S_IWUSR,
 static OVERLAY_ATTR(pre_mult_alpha, S_IRUGO|S_IWUSR,
                 overlay_pre_mult_alpha_show,
                 overlay_pre_mult_alpha_store);
+static OVERLAY_ATTR(zorder, S_IRUGO|S_IWUSR,
+                overlay_zorder_show, overlay_zorder_store);
 
 static struct attribute *overlay_sysfs_attrs[] = {
         &overlay_attr_name.attr,
@@ -348,6 +386,7 @@ static struct attribute *overlay_sysfs_attrs[] = {
         &overlay_attr_enabled.attr,
         &overlay_attr_global_alpha.attr,
         &overlay_attr_pre_mult_alpha.attr,
+        &overlay_attr_zorder.attr,
         NULL
 };
 
@@ -397,6 +436,7 @@ int dss_check_overlay(struct omap_overlay *ovl, struct omap_dss_device *dssdev)
         struct omap_overlay_info *info;
         u16 outw, outh;
         u16 dw, dh;
+        int i;
 
         if (!dssdev)
                 return 0;
@@ -452,6 +492,31 @@ int dss_check_overlay(struct omap_overlay *ovl, struct omap_dss_device *dssdev)
                 return -EINVAL;
         }
 
+        if (ovl->caps & OMAP_DSS_OVL_CAP_ZORDER) {
+                if (info->zorder < 0 || info->zorder > 3) {
+                        DSSERR("zorder out of range: %d\n",
+                                info->zorder);
+                        return -EINVAL;
+                }
+                /*
+                 * Check that zorder doesn't match with zorder of any other
+                 * overlay which is enabled and is also connected to the same
+                 * manager
+                 */
+                for (i = 0; i < omap_dss_get_num_overlays(); i++) {
+                        struct omap_overlay *tmp_ovl = omap_dss_get_overlay(i);
+
+                        if (tmp_ovl->id != ovl->id &&
+                                        tmp_ovl->manager == ovl->manager &&
+                                        tmp_ovl->info.enabled == true &&
+                                        tmp_ovl->info.zorder == info->zorder) {
+                                DSSERR("%s and %s have same zorder: %d\n",
+                                        ovl->name, tmp_ovl->name, info->zorder);
+                                return -EINVAL;
+                        }
+                }
+        }
+
         return 0;
 }
 
@@ -604,21 +669,28 @@ void dss_init_overlays(struct platform_device *pdev)
                         ovl->name = "gfx";
                         ovl->id = OMAP_DSS_GFX;
                         ovl->info.global_alpha = 255;
+                        ovl->info.zorder = 0;
                         break;
                 case 1:
                         ovl->name = "vid1";
                         ovl->id = OMAP_DSS_VIDEO1;
                         ovl->info.global_alpha = 255;
+                        ovl->info.zorder =
+                                dss_has_feature(FEAT_ALPHA_FREE_ZORDER) ? 3 : 0;
                         break;
                 case 2:
                         ovl->name = "vid2";
                         ovl->id = OMAP_DSS_VIDEO2;
                         ovl->info.global_alpha = 255;
+                        ovl->info.zorder =
+                                dss_has_feature(FEAT_ALPHA_FREE_ZORDER) ? 2 : 0;
                         break;
                 case 3:
                         ovl->name = "vid3";
                         ovl->id = OMAP_DSS_VIDEO3;
                         ovl->info.global_alpha = 255;
+                        ovl->info.zorder =
+                                dss_has_feature(FEAT_ALPHA_FREE_ZORDER) ? 1 : 0;
                         break;
                 }
 
diff --git a/include/video/omapdss.h b/include/video/omapdss.h
index 27d9cce2591..b66ebb2032c 100644
--- a/include/video/omapdss.h
+++ b/include/video/omapdss.h
@@ -377,6 +377,7 @@ struct omap_overlay_info {
         u16 out_height; /* if 0, out_height == height */
         u8 global_alpha;
         u8 pre_mult_alpha;
+        u8 zorder;
 };
 
 struct omap_overlay {