1 files changed, 122 insertions, 0 deletions
diff --git a/drivers/gpu/drm/sti/sti_plane.c b/drivers/gpu/drm/sti/sti_plane.c
new file mode 100644
index 000000000..d5c5e91f2
--- /dev/null
+++ b/drivers/gpu/drm/sti/sti_plane.c
@@ -0,0 +1,122 @@
+/*
+ * Copyright (C) STMicroelectronics SA 2014
+ * Authors: Benjamin Gaignard <benjamin.gaignard@st.com>
+ *          Fabien Dessenne <fabien.dessenne@st.com>
+ *          for STMicroelectronics.
+ * License terms:  GNU General Public License (GPL), version 2
+ */
+
+#include <drm/drmP.h>
+#include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_gem_cma_helper.h>
+
+#include "sti_compositor.h"
+#include "sti_drv.h"
+#include "sti_plane.h"
+
+/* (Background) < GDP0 < GDP1 < HQVDP0 < GDP2 < GDP3 < (ForeGround) */
+enum sti_plane_desc sti_plane_default_zorder[] = {
+	STI_GDP_0,
+	STI_GDP_1,
+	STI_HQVDP_0,
+	STI_GDP_2,
+	STI_GDP_3,
+};
+
+const char *sti_plane_to_str(struct sti_plane *plane)
+{
+	switch (plane->desc) {
+	case STI_GDP_0:
+		return "GDP0";
+	case STI_GDP_1:
+		return "GDP1";
+	case STI_GDP_2:
+		return "GDP2";
+	case STI_GDP_3:
+		return "GDP3";
+	case STI_HQVDP_0:
+		return "HQVDP0";
+	case STI_CURSOR:
+		return "CURSOR";
+	default:
+		return "<UNKNOWN PLANE>";
+	}
+}
+EXPORT_SYMBOL(sti_plane_to_str);
+
+static void sti_plane_destroy(struct drm_plane *drm_plane)
+{
+	DRM_DEBUG_DRIVER("\n");
+
+	drm_plane_helper_disable(drm_plane);
+	drm_plane_cleanup(drm_plane);
+}
+
+static int sti_plane_set_property(struct drm_plane *drm_plane,
+				  struct drm_property *property,
+				  uint64_t val)
+{
+	struct drm_device *dev = drm_plane->dev;
+	struct sti_private *private = dev->dev_private;
+	struct sti_plane *plane = to_sti_plane(drm_plane);
+
+	DRM_DEBUG_DRIVER("\n");
+
+	if (property == private->plane_zorder_property) {
+		plane->zorder = val;
+		return 0;
+	}
+
+	return -EINVAL;
+}
+
+static void sti_plane_attach_zorder_property(struct drm_plane *drm_plane)
+{
+	struct drm_device *dev = drm_plane->dev;
+	struct sti_private *private = dev->dev_private;
+	struct sti_plane *plane = to_sti_plane(drm_plane);
+	struct drm_property *prop;
+
+	prop = private->plane_zorder_property;
+	if (!prop) {
+		prop = drm_property_create_range(dev, 0, "zpos", 1,
+						 GAM_MIXER_NB_DEPTH_LEVEL);
+		if (!prop)
+			return;
+
+		private->plane_zorder_property = prop;
+	}
+
+	drm_object_attach_property(&drm_plane->base, prop, plane->zorder);
+}
+
+void sti_plane_init_property(struct sti_plane *plane,
+			     enum drm_plane_type type)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(sti_plane_default_zorder); i++)
+		if (sti_plane_default_zorder[i] == plane->desc)
+			break;
+
+	plane->zorder = i + 1;
+
+	if (type == DRM_PLANE_TYPE_OVERLAY)
+		sti_plane_attach_zorder_property(&plane->drm_plane);
+
+	DRM_DEBUG_DRIVER("drm plane:%d mapped to %s with zorder:%d\n",
+			 plane->drm_plane.base.id,
+			 sti_plane_to_str(plane), plane->zorder);
+}
+EXPORT_SYMBOL(sti_plane_init_property);
+
+struct drm_plane_funcs sti_plane_helpers_funcs = {
+	.update_plane = drm_atomic_helper_update_plane,
+	.disable_plane = drm_atomic_helper_disable_plane,
+	.destroy = sti_plane_destroy,
+	.set_property = sti_plane_set_property,
+	.reset = drm_atomic_helper_plane_reset,
+	.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
+};
+EXPORT_SYMBOL(sti_plane_helpers_funcs);