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 Tested-by: Gerd Hoffmann kraxel@redhat.com Acked-by: Gerd Hoffmann kraxel@redhat.com --- drivers/gpu/drm/udl/udl_modeset.c | 34 ++++++++++++------------------- 1 file changed, 13 insertions(+), 21 deletions(-)
diff --git a/drivers/gpu/drm/udl/udl_modeset.c b/drivers/gpu/drm/udl/udl_modeset.c index 9d34ec9d03f6..8d98bf69d075 100644 --- a/drivers/gpu/drm/udl/udl_modeset.c +++ b/drivers/gpu/drm/udl/udl_modeset.c @@ -15,6 +15,7 @@ #include <drm/drm_crtc_helper.h> #include <drm/drm_damage_helper.h> #include <drm/drm_fourcc.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_modeset_helper_vtables.h> @@ -266,18 +267,17 @@ static int udl_aligned_damage_clip(struct drm_rect *clip, int x, int y, return 0; }
-static int udl_handle_damage(struct drm_framebuffer *fb, int x, int y, - int width, int height) +static int udl_handle_damage(struct drm_framebuffer *fb, const struct dma_buf_map *map, + int x, int y, int width, int height) { struct drm_device *dev = fb->dev; struct dma_buf_attachment *import_attach = fb->obj[0]->import_attach; + void *vaddr = map->vaddr; /* TODO: Use mapping abstraction properly */ int i, ret, tmp_ret; char *cmd; struct urb *urb; struct drm_rect clip; int log_bpp; - struct dma_buf_map map; - void *vaddr;
ret = udl_log_cpp(fb->format->cpp[0]); if (ret < 0) @@ -297,17 +297,10 @@ static int udl_handle_damage(struct drm_framebuffer *fb, int x, int y, return ret; }
- ret = drm_gem_shmem_vmap(fb->obj[0], &map); - if (ret) { - DRM_ERROR("failed to vmap fb\n"); - goto out_dma_buf_end_cpu_access; - } - vaddr = map.vaddr; /* TODO: Use mapping abstraction properly */ - urb = udl_get_urb(dev); if (!urb) { ret = -ENOMEM; - goto out_drm_gem_shmem_vunmap; + goto out_dma_buf_end_cpu_access; } cmd = urb->transfer_buffer;
@@ -320,7 +313,7 @@ static int udl_handle_damage(struct drm_framebuffer *fb, int x, int y, &cmd, byte_offset, dev_byte_offset, byte_width); if (ret) - goto out_drm_gem_shmem_vunmap; + goto out_dma_buf_end_cpu_access; }
if (cmd > (char *)urb->transfer_buffer) { @@ -336,8 +329,6 @@ static int udl_handle_damage(struct drm_framebuffer *fb, int x, int y,
ret = 0;
-out_drm_gem_shmem_vunmap: - drm_gem_shmem_vunmap(fb->obj[0], &map); out_dma_buf_end_cpu_access: if (import_attach) { tmp_ret = dma_buf_end_cpu_access(import_attach->dmabuf, @@ -375,6 +366,7 @@ udl_simple_display_pipe_enable(struct drm_simple_display_pipe *pipe, struct drm_framebuffer *fb = plane_state->fb; struct udl_device *udl = to_udl(dev); struct drm_display_mode *mode = &crtc_state->mode; + struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state); char *buf; char *wrptr; int color_depth = UDL_COLOR_DEPTH_16BPP; @@ -400,7 +392,7 @@ udl_simple_display_pipe_enable(struct drm_simple_display_pipe *pipe,
udl->mode_buf_len = wrptr - buf;
- udl_handle_damage(fb, 0, 0, fb->width, fb->height); + udl_handle_damage(fb, &shadow_plane_state->map[0], 0, 0, fb->width, fb->height);
if (!crtc_state->mode_changed) return; @@ -435,6 +427,7 @@ udl_simple_display_pipe_update(struct drm_simple_display_pipe *pipe, struct drm_plane_state *old_plane_state) { struct drm_plane_state *state = pipe->plane.state; + struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(state); struct drm_framebuffer *fb = state->fb; struct drm_rect rect;
@@ -442,17 +435,16 @@ udl_simple_display_pipe_update(struct drm_simple_display_pipe *pipe, return;
if (drm_atomic_helper_damage_merged(old_plane_state, state, &rect)) - udl_handle_damage(fb, rect.x1, rect.y1, rect.x2 - rect.x1, - rect.y2 - rect.y1); + udl_handle_damage(fb, &shadow_plane_state->map[0], rect.x1, rect.y1, + rect.x2 - rect.x1, rect.y2 - rect.y1); }
-static const -struct drm_simple_display_pipe_funcs udl_simple_display_pipe_funcs = { +static const struct drm_simple_display_pipe_funcs udl_simple_display_pipe_funcs = { .mode_valid = udl_simple_display_pipe_mode_valid, .enable = udl_simple_display_pipe_enable, .disable = udl_simple_display_pipe_disable, .update = udl_simple_display_pipe_update, - .prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb, + DRM_GEM_SIMPLE_DISPLAY_PIPE_SHADOW_PLANE_FUNCS, };
/*