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drm/udl: Move vmap out of commit tail 

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>
Link: https://patchwork.freedesktop.org/patch/msgid/20210208115538.6430-8-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2021-02-08 12:55:38 +01:00
parent 4ac0868d43
commit 5ceeb32863
1 changed files with 13 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

34
drivers/gpu/drm/udl/udl_modeset.c
View File

@ -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,
};
/*