OMAPDSS: DISPC: zorder support for DSS overlays
Add zorder support on OMAP4, this feature allows deciding the visibility order
of the overlays based on the zorder value provided as an overlay info parameter
or a sysfs attribute of the overlay object.
Use the overlay cap OMAP_DSS_OVL_CAP_ZORDER to determine whether zorder is
supported for the overlay or not. Use dss feature FEAT_ALPHA_FREE_ZORDER
if the caps are not available.
Ensure that all overlays that are enabled and connected to the same manager
have different zorders. Swapping zorders of 2 enabled overlays currently
requires disabling one of the overlays.
Signed-off-by: Archit Taneja <archit@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
diff --git a/drivers/video/omap2/dss/overlay.c b/drivers/video/omap2/dss/overlay.c
index 11d21e3..ab8e40e 100644
--- a/drivers/video/omap2/dss/overlay.c
+++ b/drivers/video/omap2/dss/overlay.c
@@ -311,6 +311,42 @@
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(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 @@
&overlay_attr_enabled.attr,
&overlay_attr_global_alpha.attr,
&overlay_attr_pre_mult_alpha.attr,
+ &overlay_attr_zorder.attr,
NULL
};
@@ -397,6 +436,7 @@
struct omap_overlay_info *info;
u16 outw, outh;
u16 dw, dh;
+ int i;
if (!dssdev)
return 0;
@@ -452,6 +492,31 @@
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 @@
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;
}