1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3  * R-Car Display Unit Writeback Support
4  *
5  * Copyright (C) 2019 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
6  */
7 
8 #ifndef __RCAR_DU_WRITEBACK_H__
9 #define __RCAR_DU_WRITEBACK_H__
10 
11 #include <drm/drm_plane.h>
12 
13 struct rcar_du_crtc;
14 struct rcar_du_device;
15 struct vsp1_du_atomic_pipe_config;
16 
17 #ifdef CONFIG_DRM_RCAR_WRITEBACK
18 int rcar_du_writeback_init(struct rcar_du_device *rcdu,
19 			   struct rcar_du_crtc *rcrtc);
20 void rcar_du_writeback_setup(struct rcar_du_crtc *rcrtc,
21 			     struct vsp1_du_writeback_config *cfg);
22 void rcar_du_writeback_complete(struct rcar_du_crtc *rcrtc);
23 #else
24 static inline int rcar_du_writeback_init(struct rcar_du_device *rcdu,
25 					 struct rcar_du_crtc *rcrtc)
26 {
27 	return -ENXIO;
28 }
29 static inline void
30 rcar_du_writeback_setup(struct rcar_du_crtc *rcrtc,
31 			struct vsp1_du_writeback_config *cfg)
32 {
33 }
34 static inline void rcar_du_writeback_complete(struct rcar_du_crtc *rcrtc)
35 {
36 }
37 #endif
38 
39 #endif /* __RCAR_DU_WRITEBACK_H__ */
40