[PATCH v7 10/17] drm: rcar-du: Move rcar_du_vsp_plane_prepare_fb()

[Biju Das]

Move rcar_du_vsp_plane_prepare_fb() to RCar DU vsp lib so that
both RCar and RZ/G2L DU vsp drivers can share this function.

Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
---
v6->v7:
 * Rebased to drm-tip.
v1->v6:
 * Rebased on drm-misc-next and DU-next.
v1:
 * Created the lib suggested by Laurent.
Ref:
 https://patchwork.kernel.org/project/linux-renesas-soc/patch/20220316131100.30685-6-biju.das.jz@xxxxxxxxxxxxxx/
---
 drivers/gpu/drm/rcar-du/rcar_du_vsp.c     | 21 ---------------------
 drivers/gpu/drm/rcar-du/rcar_du_vsp_lib.c | 21 +++++++++++++++++++++
 drivers/gpu/drm/rcar-du/rcar_du_vsp_lib.h |  8 ++++++++
 3 files changed, 29 insertions(+), 21 deletions(-)

diff --git a/drivers/gpu/drm/rcar-du/rcar_du_vsp.c b/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
index e54a605a1bdf..3abc5031112e 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
@@ -139,27 +139,6 @@ static void rcar_du_vsp_plane_setup(struct rcar_du_vsp_plane *plane)
 			      plane->index, &cfg);
 }
 
-static int rcar_du_vsp_plane_prepare_fb(struct drm_plane *plane,
-					struct drm_plane_state *state)
-{
-	struct rcar_du_vsp_plane_state *rstate = to_rcar_vsp_plane_state(state);
-	struct rcar_du_vsp *vsp = to_rcar_vsp_plane(plane)->vsp;
-	int ret;
-
-	/*
-	 * There's no need to prepare (and unprepare) the framebuffer when the
-	 * plane is not visible, as it will not be displayed.
-	 */
-	if (!state->visible)
-		return 0;
-
-	ret = rcar_du_vsp_map_fb(vsp, state->fb, rstate->sg_tables);
-	if (ret < 0)
-		return ret;
-
-	return drm_gem_plane_helper_prepare_fb(plane, state);
-}
-
 static void rcar_du_vsp_plane_cleanup_fb(struct drm_plane *plane,
 					 struct drm_plane_state *state)
 {
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_vsp_lib.c b/drivers/gpu/drm/rcar-du/rcar_du_vsp_lib.c
index f2d55695f6c1..91259d44efe9 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_vsp_lib.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_vsp_lib.c
@@ -177,6 +177,27 @@ int rcar_du_vsp_map_fb(struct rcar_du_vsp *vsp, struct drm_framebuffer *fb,
 	return ret;
 }
 
+int rcar_du_vsp_plane_prepare_fb(struct drm_plane *plane,
+				 struct drm_plane_state *state)
+{
+	struct rcar_du_vsp_plane_state *rstate = to_rcar_vsp_plane_state(state);
+	struct rcar_du_vsp *vsp = to_rcar_vsp_plane(plane)->vsp;
+	int ret;
+
+	/*
+	 * There's no need to prepare (and unprepare) the framebuffer when the
+	 * plane is not visible, as it will not be displayed.
+	 */
+	if (!state->visible)
+		return 0;
+
+	ret = rcar_du_vsp_map_fb(vsp, state->fb, rstate->sg_tables);
+	if (ret < 0)
+		return ret;
+
+	return drm_gem_plane_helper_prepare_fb(plane, state);
+}
+
 void rcar_du_vsp_unmap_fb(struct rcar_du_vsp *vsp, struct drm_framebuffer *fb,
 			  struct sg_table sg_tables[3])
 {
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_vsp_lib.h b/drivers/gpu/drm/rcar-du/rcar_du_vsp_lib.h
index 2ced23132db2..3d3a7735facd 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_vsp_lib.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_vsp_lib.h
@@ -25,6 +25,8 @@ void rcar_du_vsp_unmap_fb(struct rcar_du_vsp *vsp, struct drm_framebuffer *fb,
 int rcar_du_lib_vsp_init(struct rcar_du_vsp *vsp, struct device_node *np,
 			 unsigned int crtcs,
 			 const struct drm_plane_helper_funcs *rcar_du_vsp_plane_helper_funcs);
+int rcar_du_vsp_plane_prepare_fb(struct drm_plane *plane,
+				 struct drm_plane_state *state);
 #else
 static inline void rcar_du_vsp_disable(struct rcar_du_crtc *crtc) { };
 static inline void rcar_du_vsp_atomic_begin(struct rcar_du_crtc *crtc) { };
@@ -49,6 +51,12 @@ rcar_du_lib_vsp_init(struct rcar_du_vsp *vsp, struct device_node *np,
 {
 	return -ENXIO;
 }
+
+static inline int rcar_du_vsp_plane_prepare_fb(struct drm_plane *plane,
+					       struct drm_plane_state *state)
+{
+	return -ENXIO;
+}
 #endif
 
 #endif /* __RCAR_DU_VSP_LIB_H__ */
-- 
2.25.1