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 SHMEM shadow plane. The enable and prepare
callbacks use the established mapping for damage handling.
Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
---
drivers/gpu/drm/mgag200/Kconfig | 1 +
drivers/gpu/drm/mgag200/mgag200_mode.c | 25 ++++++++++---------------
2 files changed, 11 insertions(+), 15 deletions(-)
diff --git a/drivers/gpu/drm/mgag200/Kconfig b/drivers/gpu/drm/mgag200/Kconfig
index eec59658a938..b4e5a1eb57ce 100644
--- a/drivers/gpu/drm/mgag200/Kconfig
+++ b/drivers/gpu/drm/mgag200/Kconfig
@@ -3,6 +3,7 @@ config DRM_MGAG200
tristate "Matrox G200"
depends on DRM && PCI && MMU
select DRM_GEM_SHMEM_HELPER
+ select DRM_GEM_SHMEM_KMS_HELPER
select DRM_KMS_HELPER
help
This is a KMS driver for Matrox G200 chips. It supports the original
diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c b/drivers/gpu/drm/mgag200/mgag200_mode.c
index 1dfc42170059..70040a02ee98 100644
--- a/drivers/gpu/drm/mgag200/mgag200_mode.c
+++ b/drivers/gpu/drm/mgag200/mgag200_mode.c
@@ -18,6 +18,7 @@
#include <drm/drm_format_helper.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_gem_shmem_kms_helper.h>
#include <drm/drm_plane_helper.h>
#include <drm/drm_print.h>
#include <drm/drm_probe_helper.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 +1571,8 @@ 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_gem_shmem_shadow_plane_state *shadow_plane_state =
+ to_drm_gem_shmem_shadow_plane_state(plane_state);
struct drm_rect fullscreen = {
.x1 = 0,
.x2 = fb->width,
@@ -1608,7 +1601,7 @@ 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 +1642,8 @@ 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_gem_shmem_shadow_plane_state *shadow_plane_state =
+ to_drm_gem_shmem_shadow_plane_state(state);
struct drm_framebuffer *fb = state->fb;
struct drm_rect damage;
@@ -1656,7 +1651,7 @@ 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 +1661,7 @@ 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_SHMEM_SIMPLE_DISPLAY_PIPE_SHADOW_PLANE_FUNCS,
};
static const uint32_t mgag200_simple_display_pipe_formats[] = {
--
2.30.0
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