[media] v4l: vsp1: Group DRM RPF parameters in a structure

The vsp1_du_atomic_update_ext() function takes 7 RPF configuration
parameters, and more will likely be added later. This makes the code
difficult to read and error-prone as multiple parameters have the same
type.

Make the API safer and easier to extend in the future by grouping all
parameters in a structure. Use macro magic to ease the transition to the
new function by allowing the old and new functions to be called using
the same name. The macros and static inline wrapper will be removed as
soon as the caller is updated.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

1 files changed, 34 insertions, 13 deletions

diff --git a/include/media/vsp1.h b/include/media/vsp1.h
index 3e654a0455bd..ea8ad7537057 100644
--- a/include/media/vsp1.h
+++ b/include/media/vsp1.h
@@ -14,31 +14,52 @@
 #define __MEDIA_VSP1_H__
 
 #include <linux/types.h>
+#include <linux/videodev2.h>
 
 struct device;
-struct v4l2_rect;
 
 int vsp1_du_init(struct device *dev);
 
 int vsp1_du_setup_lif(struct device *dev, unsigned int width,
                       unsigned int height);
 
+struct vsp1_du_atomic_config {
+        u32 pixelformat;
+        unsigned int pitch;
+        dma_addr_t mem[2];
+        struct v4l2_rect src;
+        struct v4l2_rect dst;
+        unsigned int alpha;
+        unsigned int zpos;
+};
+
 void vsp1_du_atomic_begin(struct device *dev);
-int vsp1_du_atomic_update_ext(struct device *dev, unsigned int rpf,
-                              u32 pixelformat, unsigned int pitch,
-                              dma_addr_t mem[2], const struct v4l2_rect *src,
-                              const struct v4l2_rect *dst, unsigned int alpha,
-                              unsigned int zpos);
+int __vsp1_du_atomic_update(struct device *dev, unsigned int rpf,
+                            const struct vsp1_du_atomic_config *cfg);
 void vsp1_du_atomic_flush(struct device *dev);
 
-static inline int vsp1_du_atomic_update(struct device *dev,
-                                        unsigned int rpf_index, u32 pixelformat,
-                                        unsigned int pitch, dma_addr_t mem[2],
-                                        const struct v4l2_rect *src,
-                                        const struct v4l2_rect *dst)
+static inline int vsp1_du_atomic_update_old(struct device *dev,
+        unsigned int rpf, u32 pixelformat, unsigned int pitch,
+        dma_addr_t mem[2], const struct v4l2_rect *src,
+        const struct v4l2_rect *dst)
 {
-        return vsp1_du_atomic_update_ext(dev, rpf_index, pixelformat, pitch,
-                                         mem, src, dst, 255, 0);
+        struct vsp1_du_atomic_config cfg = {
+                .pixelformat = pixelformat,
+                .pitch = pitch,
+                .mem[0] = mem[0],
+                .mem[1] = mem[1],
+                .src = *src,
+                .dst = *dst,
+                .alpha = 255,
+                .zpos = 0,
+        };
+
+        return __vsp1_du_atomic_update(dev, rpf, &cfg);
 }
 
+#define _vsp1_du_atomic_update(_1, _2, _3, _4, _5, _6, _7, f, ...) f
+#define vsp1_du_atomic_update(...) \
+        _vsp1_du_atomic_update(__VA_ARGS__, vsp1_du_atomic_update_old, 0, 0, \
+                               0, __vsp1_du_atomic_update)(__VA_ARGS__)
+
 #endif /* __MEDIA_VSP1_H__ */