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drm/gm12u320: Move vmap out of commit tail

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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/20210208115538.6430-7-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann
2021-02-08 12:55:37 +01:00
parent 681a2c5dfd
commit 4ac0868d43
1 changed files with 13 additions and 15 deletions
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28
drivers/gpu/drm/tiny/gm12u320.c
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@ -16,8 +16,9 @@
#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>
@ -94,6 +95,7 @@ struct gm12u320_device {
struct drm_rect rect;
int frame;
int draw_status_timeout;
struct dma_buf_map src_map;
} fb_update;
};
@ -250,7 +252,6 @@ static void gm12u320_copy_fb_to_blocks(struct gm12u320_device *gm12u320)
{
int block, dst_offset, len, remain, ret, x1, x2, y1, y2;
struct drm_framebuffer *fb;
struct dma_buf_map map;
void *vaddr;
u8 *src;
@ -264,20 +265,14 @@ static void gm12u320_copy_fb_to_blocks(struct gm12u320_device *gm12u320)
x2 = gm12u320->fb_update.rect.x2;
y1 = gm12u320->fb_update.rect.y1;
y2 = gm12u320->fb_update.rect.y2;
ret = drm_gem_shmem_vmap(fb->obj[0], &map);
if (ret) {
GM12U320_ERR("failed to vmap fb: %d\n", ret);
goto put_fb;
}
vaddr = map.vaddr; /* TODO: Use mapping abstraction properly */
vaddr = gm12u320->fb_update.src_map.vaddr; /* TODO: Use mapping abstraction properly */
if (fb->obj[0]->import_attach) {
ret = dma_buf_begin_cpu_access(
fb->obj[0]->import_attach->dmabuf, DMA_FROM_DEVICE);
if (ret) {
GM12U320_ERR("dma_buf_begin_cpu_access err: %d\n", ret);
goto vunmap;
goto put_fb;
}
}
@ -321,8 +316,6 @@ static void gm12u320_copy_fb_to_blocks(struct gm12u320_device *gm12u320)
if (ret)
GM12U320_ERR("dma_buf_end_cpu_access err: %d\n", ret);
}
vunmap:
drm_gem_shmem_vunmap(fb->obj[0], &map);
put_fb:
drm_framebuffer_put(fb);
gm12u320->fb_update.fb = NULL;
@ -410,7 +403,7 @@ err:
GM12U320_ERR("Frame update error: %d\n", ret);
}
static void gm12u320_fb_mark_dirty(struct drm_framebuffer *fb,
static void gm12u320_fb_mark_dirty(struct drm_framebuffer *fb, const struct dma_buf_map *map,
struct drm_rect *dirty)
{
struct gm12u320_device *gm12u320 = to_gm12u320(fb->dev);
@ -424,6 +417,7 @@ static void gm12u320_fb_mark_dirty(struct drm_framebuffer *fb,
drm_framebuffer_get(fb);
gm12u320->fb_update.fb = fb;
gm12u320->fb_update.rect = *dirty;
gm12u320->fb_update.src_map = *map;
wakeup = true;
} else {
struct drm_rect *rect = &gm12u320->fb_update.rect;
@ -452,6 +446,7 @@ static void gm12u320_stop_fb_update(struct gm12u320_device *gm12u320)
mutex_lock(&gm12u320->fb_update.lock);
old_fb = gm12u320->fb_update.fb;
gm12u320->fb_update.fb = NULL;
dma_buf_map_clear(&gm12u320->fb_update.src_map);
mutex_unlock(&gm12u320->fb_update.lock);
drm_framebuffer_put(old_fb);
@ -564,9 +559,10 @@ static void gm12u320_pipe_enable(struct drm_simple_display_pipe *pipe,
{
struct drm_rect rect = { 0, 0, GM12U320_USER_WIDTH, GM12U320_HEIGHT };
struct gm12u320_device *gm12u320 = to_gm12u320(pipe->crtc.dev);
struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state);
gm12u320->fb_update.draw_status_timeout = FIRST_FRAME_TIMEOUT;
gm12u320_fb_mark_dirty(plane_state->fb, &rect);
gm12u320_fb_mark_dirty(plane_state->fb, &shadow_plane_state->map[0], &rect);
}
static void gm12u320_pipe_disable(struct drm_simple_display_pipe *pipe)
@ -580,16 +576,18 @@ static void gm12u320_pipe_update(struct drm_simple_display_pipe *pipe,
struct drm_plane_state *old_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_rect rect;
if (drm_atomic_helper_damage_merged(old_state, state, &rect))
gm12u320_fb_mark_dirty(pipe->plane.state->fb, &rect);
gm12u320_fb_mark_dirty(state->fb, &shadow_plane_state->map[0], &rect);
}
static const struct drm_simple_display_pipe_funcs gm12u320_pipe_funcs = {
.enable = gm12u320_pipe_enable,
.disable = gm12u320_pipe_disable,
.update = gm12u320_pipe_update,
DRM_GEM_SIMPLE_DISPLAY_PIPE_SHADOW_PLANE_FUNCS,
};
static const uint32_t gm12u320_pipe_formats[] = {