Vmap operations may acquire the dmabuf reservation lock, which is not allowed within atomic commit-tail functions. Therefore move vmap and vunmap from the damage handler into prepare_fb and cleanup_fb callbacks.
The mapping is provided as GEM shadow-buffered plane. The functions in the commit tail use the pre-established mapping for damage handling.
Signed-off-by: Thomas Zimmermann tzimmermann@suse.de --- drivers/gpu/drm/tiny/cirrus.c | 43 ++++++++++++++--------------------- 1 file changed, 17 insertions(+), 26 deletions(-)
diff --git a/drivers/gpu/drm/tiny/cirrus.c b/drivers/gpu/drm/tiny/cirrus.c index a043e602199e..ad922c3ec681 100644 --- a/drivers/gpu/drm/tiny/cirrus.c +++ b/drivers/gpu/drm/tiny/cirrus.c @@ -33,8 +33,9 @@ #include <drm/drm_file.h> #include <drm/drm_format_helper.h> #include <drm/drm_fourcc.h> -#include <drm/drm_gem_shmem_helper.h> +#include <drm/drm_gem_atomic_helper.h> #include <drm/drm_gem_framebuffer_helper.h> +#include <drm/drm_gem_shmem_helper.h> #include <drm/drm_ioctl.h> #include <drm/drm_managed.h> #include <drm/drm_modeset_helper_vtables.h> @@ -311,22 +312,15 @@ static int cirrus_mode_set(struct cirrus_device *cirrus, return 0; }
-static int cirrus_fb_blit_rect(struct drm_framebuffer *fb, +static int cirrus_fb_blit_rect(struct drm_framebuffer *fb, const struct dma_buf_map *map, struct drm_rect *rect) { struct cirrus_device *cirrus = to_cirrus(fb->dev); - struct dma_buf_map map; - void *vmap; - int idx, ret; + void *vmap = map->vaddr; /* TODO: Use mapping abstraction properly */ + int idx;
- ret = -ENODEV; if (!drm_dev_enter(&cirrus->dev, &idx)) - goto out; - - ret = drm_gem_shmem_vmap(fb->obj[0], &map); - if (ret) - goto out_dev_exit; - vmap = map.vaddr; /* TODO: Use mapping abstraction properly */ + return -ENODEV;
if (cirrus->cpp == fb->format->cpp[0]) drm_fb_memcpy_dstclip(cirrus->vram, @@ -345,16 +339,12 @@ static int cirrus_fb_blit_rect(struct drm_framebuffer *fb, else WARN_ON_ONCE("cpp mismatch");
- drm_gem_shmem_vunmap(fb->obj[0], &map); - ret = 0; - -out_dev_exit: drm_dev_exit(idx); -out: - return ret; + + return 0; }
-static int cirrus_fb_blit_fullscreen(struct drm_framebuffer *fb) +static int cirrus_fb_blit_fullscreen(struct drm_framebuffer *fb, const struct dma_buf_map *map) { struct drm_rect fullscreen = { .x1 = 0, @@ -362,7 +352,7 @@ static int cirrus_fb_blit_fullscreen(struct drm_framebuffer *fb) .y1 = 0, .y2 = fb->height, }; - return cirrus_fb_blit_rect(fb, &fullscreen); + return cirrus_fb_blit_rect(fb, map, &fullscreen); }
static int cirrus_check_size(int width, int height, @@ -441,9 +431,10 @@ static void cirrus_pipe_enable(struct drm_simple_display_pipe *pipe, struct drm_plane_state *plane_state) { struct cirrus_device *cirrus = to_cirrus(pipe->crtc.dev); + struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state);
cirrus_mode_set(cirrus, &crtc_state->mode, plane_state->fb); - cirrus_fb_blit_fullscreen(plane_state->fb); + cirrus_fb_blit_fullscreen(plane_state->fb, &shadow_plane_state->map[0]); }
static void cirrus_pipe_update(struct drm_simple_display_pipe *pipe, @@ -451,16 +442,15 @@ static void cirrus_pipe_update(struct drm_simple_display_pipe *pipe, { struct cirrus_device *cirrus = to_cirrus(pipe->crtc.dev); struct drm_plane_state *state = pipe->plane.state; + struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(state); struct drm_crtc *crtc = &pipe->crtc; struct drm_rect rect;
- if (pipe->plane.state->fb && - cirrus->cpp != cirrus_cpp(pipe->plane.state->fb)) - cirrus_mode_set(cirrus, &crtc->mode, - pipe->plane.state->fb); + if (state->fb && cirrus->cpp != cirrus_cpp(state->fb)) + cirrus_mode_set(cirrus, &crtc->mode, state->fb);
if (drm_atomic_helper_damage_merged(old_state, state, &rect)) - cirrus_fb_blit_rect(pipe->plane.state->fb, &rect); + cirrus_fb_blit_rect(state->fb, &shadow_plane_state->map[0], &rect); }
static const struct drm_simple_display_pipe_funcs cirrus_pipe_funcs = { @@ -468,6 +458,7 @@ static const struct drm_simple_display_pipe_funcs cirrus_pipe_funcs = { .check = cirrus_pipe_check, .enable = cirrus_pipe_enable, .update = cirrus_pipe_update, + DRM_GEM_SIMPLE_DISPLAY_PIPE_SHADOW_PLANE_FUNCS, };
static const uint32_t cirrus_formats[] = {