drm/rockchip: vop: set plane's zpos according to type

The zpos currently configure is the order in vop_win_data array,
which is related to the actual hardware plane.
But in the Linux platform, such as video hardware and camera preview,
it can only be played on the nv12 plane.
So set the order of zpos to PRIMARY < OVERLAY (if have) < CURSOR (if have).

Change-Id: Ia9ab3cb9225fd2c385703109afbfbb42a1564110
Signed-off-by: Nickey Yang <[email protected]>

Author: yueshu

drivers/gpu/drm/rockchip/rockchip_drm_vop.c

@@ -197,6 +197,7 @@ struct vop_win {
 
 	int win_id;
 	int area_id;
+	int zpos;
 	uint32_t offset;
 	enum drm_plane_type type;
 	const struct vop_win_phy *phy;
@@ -1852,7 +1853,7 @@ static void vop_atomic_plane_reset(struct drm_plane *plane)
 	if (!vop_plane_state)
 		return;
 
-	vop_plane_state->zpos = win->win_id;
+	vop_plane_state->zpos = win->zpos;
 	vop_plane_state->global_alpha = 0xff;
 	plane->state = &vop_plane_state->base;
 	plane->state->plane = plane;
@@ -4295,6 +4296,26 @@ static void vop_destroy_crtc(struct vop *vop)
 	drm_flip_work_cleanup(&vop->fb_unref_work);
 }
 
+/*
+ * Win_id is the order in vop_win_data array.
+ * This is related to the actual hardware plane.
+ * But in the Linux platform, such as video hardware and camera preview,
+ * it can only be played on the nv12 plane.
+ * So set the order of zpos to PRIMARY < OVERLAY (if have) < CURSOR (if have).
+ */
+static int vop_plane_get_zpos(enum drm_plane_type type, unsigned int size)
+{
+	switch (type) {
+	case DRM_PLANE_TYPE_PRIMARY:
+		return 0;
+	case DRM_PLANE_TYPE_OVERLAY:
+		return 1;
+	case DRM_PLANE_TYPE_CURSOR:
+		return size - 1;
+	}
+	return 0;
+}
+
 /*
  * Initialize the vop->win array elements.
  */
@@ -4333,6 +4354,9 @@ static int vop_win_init(struct vop *vop)
 		vop_win->vop = vop;
 		vop_win->win_id = i;
 		vop_win->area_id = 0;
+		vop_win->zpos = vop_plane_get_zpos(win_data->type,
+						   vop_data->win_size);
+
 		num_wins++;
 
 		for (j = 0; j < win_data->area_size; j++) {
@@ -4353,7 +4377,7 @@ static int vop_win_init(struct vop *vop)
 	}
 
 	prop = drm_property_create_range(vop->drm_dev, DRM_MODE_PROP_ATOMIC,
-					 "ZPOS", 0, vop->data->win_size);
+					 "ZPOS", 0, vop->data->win_size - 1);
 	if (!prop) {
 		DRM_ERROR("failed to create zpos property\n");
 		return -EINVAL;