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drm/mgag200: 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/20210208115538.6430-5-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2021-02-08 12:55:35 +01:00
parent 6dd7b6ce43
commit 4862ffaec5
1 changed files with 8 additions and 15 deletions
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23
drivers/gpu/drm/mgag200/mgag200_mode.c
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@ -17,6 +17,7 @@
#include <drm/drm_damage_helper.h>
#include <drm/drm_format_helper.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_gem_atomic_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_plane_helper.h>
#include <drm/drm_print.h>
@ -1549,22 +1550,12 @@ mgag200_simple_display_pipe_mode_valid(struct drm_simple_display_pipe *pipe,
static void
mgag200_handle_damage(struct mga_device *mdev, struct drm_framebuffer *fb,
struct drm_rect *clip)
struct drm_rect *clip, const struct dma_buf_map *map)
{
struct drm_device *dev = &mdev->base;
struct dma_buf_map map;
void *vmap;
int ret;
ret = drm_gem_shmem_vmap(fb->obj[0], &map);
if (drm_WARN_ON(dev, ret))
return; /* BUG: SHMEM BO should always be vmapped */
vmap = map.vaddr; /* TODO: Use mapping abstraction properly */
void *vmap = map->vaddr; /* TODO: Use mapping abstraction properly */
drm_fb_memcpy_dstclip(mdev->vram, vmap, fb, clip);
drm_gem_shmem_vunmap(fb->obj[0], &map);
/* Always scanout image at VRAM offset 0 */
mgag200_set_startadd(mdev, (u32)0);
mgag200_set_offset(mdev, fb);
@ -1580,6 +1571,7 @@ mgag200_simple_display_pipe_enable(struct drm_simple_display_pipe *pipe,
struct mga_device *mdev = to_mga_device(dev);
struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode;
struct drm_framebuffer *fb = plane_state->fb;
struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state);
struct drm_rect fullscreen = {
.x1 = 0,
.x2 = fb->width,
@ -1608,7 +1600,7 @@ mgag200_simple_display_pipe_enable(struct drm_simple_display_pipe *pipe,
mga_crtc_load_lut(crtc);
mgag200_enable_display(mdev);
mgag200_handle_damage(mdev, fb, &fullscreen);
mgag200_handle_damage(mdev, fb, &fullscreen, &shadow_plane_state->map[0]);
}
static void
@ -1649,6 +1641,7 @@ mgag200_simple_display_pipe_update(struct drm_simple_display_pipe *pipe,
struct drm_device *dev = plane->dev;
struct mga_device *mdev = to_mga_device(dev);
struct drm_plane_state *state = 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 damage;
@ -1656,7 +1649,7 @@ mgag200_simple_display_pipe_update(struct drm_simple_display_pipe *pipe,
return;
if (drm_atomic_helper_damage_merged(old_state, state, &damage))
mgag200_handle_damage(mdev, fb, &damage);
mgag200_handle_damage(mdev, fb, &damage, &shadow_plane_state->map[0]);
}
static const struct drm_simple_display_pipe_funcs
@ -1666,7 +1659,7 @@ mgag200_simple_display_pipe_funcs = {
.disable = mgag200_simple_display_pipe_disable,
.check = mgag200_simple_display_pipe_check,
.update = mgag200_simple_display_pipe_update,
.prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
DRM_GEM_SIMPLE_DISPLAY_PIPE_SHADOW_PLANE_FUNCS,
};
static const uint32_t mgag200_simple_display_pipe_formats[] = {