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drm: rcar-du: vsp: Extract framebuffer (un)mapping to separate functions 

The rcar_du_vsp_plane_prepare_fb() and rcar_du_vsp_plane_cleanup_fb()
functions implement the DRM plane .prepare_fb() and .cleanup_fb()
operations. They map and unmap the framebuffer to/from the VSP
internally, which will be useful to implement writeback support. Split
the mapping and unmapping out to separate functions.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
This commit is contained in:
Laurent Pinchart 2019-02-21 03:20:42 +02:00
parent d8a4ef2542
commit d46a4e93ea
2 changed files with 59 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

69
drivers/gpu/drm/rcar-du/rcar_du_vsp.c
View File

@ -10,6 +10,7 @@
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_plane_helper.h>
@ -174,26 +175,16 @@ 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)
int rcar_du_vsp_map_fb(struct rcar_du_vsp *vsp, struct drm_framebuffer *fb,
struct sg_table sg_tables[3])
{
struct rcar_du_vsp_plane_state *rstate = to_rcar_vsp_plane_state(state);
struct rcar_du_vsp *vsp = to_rcar_vsp_plane(plane)->vsp;
struct rcar_du_device *rcdu = vsp->dev;
unsigned int i;
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;
for (i = 0; i < rstate->format->planes; ++i) {
struct drm_gem_cma_object *gem =
drm_fb_cma_get_gem_obj(state->fb, i);
struct sg_table *sgt = &rstate->sg_tables[i];
for (i = 0; i < fb->format->num_planes; ++i) {
struct drm_gem_cma_object *gem = drm_fb_cma_get_gem_obj(fb, i);
struct sg_table *sgt = &sg_tables[i];
ret = dma_get_sgtable(rcdu->dev, sgt, gem->vaddr, gem->paddr,
gem->base.size);
@ -208,15 +199,11 @@ static int rcar_du_vsp_plane_prepare_fb(struct drm_plane *plane,
}
}
ret = drm_gem_fb_prepare_fb(plane, state);
if (ret)
goto fail;
return 0;
fail:
while (i--) {
struct sg_table *sgt = &rstate->sg_tables[i];
struct sg_table *sgt = &sg_tables[i];
vsp1_du_unmap_sg(vsp->vsp, sgt);
sg_free_table(sgt);
@ -225,22 +212,50 @@ fail:
return ret;
}
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_fb_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])
{
unsigned int i;
for (i = 0; i < fb->format->num_planes; ++i) {
struct sg_table *sgt = &sg_tables[i];
vsp1_du_unmap_sg(vsp->vsp, sgt);
sg_free_table(sgt);
}
}
static void rcar_du_vsp_plane_cleanup_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;
unsigned int i;
if (!state->visible)
return;
for (i = 0; i < rstate->format->planes; ++i) {
struct sg_table *sgt = &rstate->sg_tables[i];
vsp1_du_unmap_sg(vsp->vsp, sgt);
sg_free_table(sgt);
}
rcar_du_vsp_unmap_fb(vsp, state->fb, rstate->sg_tables);
}
static int rcar_du_vsp_plane_atomic_check(struct drm_plane *plane,

17
drivers/gpu/drm/rcar-du/rcar_du_vsp.h
View File

@ -12,8 +12,10 @@
#include <drm/drm_plane.h>
struct drm_framebuffer;
struct rcar_du_format_info;
struct rcar_du_vsp;
struct sg_table;
struct rcar_du_vsp_plane {
struct drm_plane plane;
@ -60,6 +62,10 @@ void rcar_du_vsp_enable(struct rcar_du_crtc *crtc);
void rcar_du_vsp_disable(struct rcar_du_crtc *crtc);
void rcar_du_vsp_atomic_begin(struct rcar_du_crtc *crtc);
void rcar_du_vsp_atomic_flush(struct rcar_du_crtc *crtc);
int rcar_du_vsp_map_fb(struct rcar_du_vsp *vsp, struct drm_framebuffer *fb,
struct sg_table sg_tables[3]);
void rcar_du_vsp_unmap_fb(struct rcar_du_vsp *vsp, struct drm_framebuffer *fb,
struct sg_table sg_tables[3]);
#else
static inline int rcar_du_vsp_init(struct rcar_du_vsp *vsp,
struct device_node *np,
@ -71,6 +77,17 @@ static inline void rcar_du_vsp_enable(struct rcar_du_crtc *crtc) { };
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) { };
static inline void rcar_du_vsp_atomic_flush(struct rcar_du_crtc *crtc) { };
static inline int rcar_du_vsp_map_fb(struct rcar_du_vsp *vsp,
struct drm_framebuffer *fb,
struct sg_table sg_tables[3])
{
return -ENXIO;
}
static inline void rcar_du_vsp_unmap_fb(struct rcar_du_vsp *vsp,
struct drm_framebuffer *fb,
struct sg_table sg_tables[3])
{
}
#endif
#endif /* __RCAR_DU_VSP_H__ */