drm/sun4i: Move layers from sun4i_drv to sun4i_crtc

This patch moves the sun4i_layers_init call from sun4i_drv_bind to
sun4i_crtc_init, and the layers pointer from struct sun4i_drv to
struct sun4i_crtc.

The layers are bound to a specific crtc, and they are not directly
used once initiated. They are used through their included drm_plane
structures.

Moving the layers into the crtc facilitates binding them to the crtc
explicitly, by setting the corresponding bit in their .possible_crtcs
fields right after the crtc is initialized. This is done in a later
patch.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

drivers/gpu/drm/sun4i/sun4i_crtc.c

@@ -28,6 +28,7 @@
 #include "sun4i_backend.h"
 #include "sun4i_crtc.h"
 #include "sun4i_drv.h"
+#include "sun4i_layer.h"
 #include "sun4i_tcon.h"
 
 static void sun4i_crtc_atomic_begin(struct drm_crtc *crtc,
@@ -149,6 +150,13 @@ struct sun4i_crtc *sun4i_crtc_init(struct drm_device *drm)
 		return ERR_PTR(-ENOMEM);
 	scrtc->drv = drv;
 
+	/* Create our layers */
+	scrtc->layers = sun4i_layers_init(drm);
+	if (IS_ERR(scrtc->layers)) {
+		dev_err(drm->dev, "Couldn't create the planes\n");
+		return ERR_CAST(scrtc->layers);
+	}
+
 	ret = drm_crtc_init_with_planes(drm, &scrtc->crtc,
 					drv->primary,
 					NULL,

drivers/gpu/drm/sun4i/sun4i_crtc.h

@@ -18,6 +18,7 @@ struct sun4i_crtc {
 	struct drm_pending_vblank_event	*event;
 
 	struct sun4i_drv		*drv;
+	struct sun4i_layer		**layers;
 };
 
 static inline struct sun4i_crtc *drm_crtc_to_sun4i_crtc(struct drm_crtc *crtc)

drivers/gpu/drm/sun4i/sun4i_drv.c

@@ -23,7 +23,7 @@
 #include "sun4i_crtc.h"
 #include "sun4i_drv.h"
 #include "sun4i_framebuffer.h"
-#include "sun4i_layer.h"
+#include "sun4i_tcon.h"
 
 static const struct file_operations sun4i_drv_fops = {
 	.owner		= THIS_MODULE,
@@ -115,14 +115,6 @@ static int sun4i_drv_bind(struct device *dev)
 		goto cleanup_mode_config;
 	}
 
-	/* Create our layers */
-	drv->layers = sun4i_layers_init(drm);
-	if (IS_ERR(drv->layers)) {
-		dev_err(drm->dev, "Couldn't create the planes\n");
-		ret = PTR_ERR(drv->layers);
-		goto cleanup_mode_config;
-	}
-
 	/* Create our CRTC */
 	drv->crtc = sun4i_crtc_init(drm);
 	if (IS_ERR(drv->crtc)) {

drivers/gpu/drm/sun4i/sun4i_drv.h

@@ -23,8 +23,6 @@ struct sun4i_drv {
 
 	struct drm_plane	*primary;
 	struct drm_fbdev_cma	*fbdev;
-
-	struct sun4i_layer	**layers;
 };
 
 #endif /* _SUN4I_DRV_H_ */