drm/atomic-helper: remove backoff hack from disable/update_plane
We can now properly retry at the top level, yay!
v2: Also remove the temporary acquire_ctx hack again, no longer
needed!
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170322215058.8671-6-daniel.vetter@ffwll.ch
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index 6096233..cc6e277 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -2101,8 +2101,7 @@ int drm_atomic_helper_update_plane(struct drm_plane *plane,
if (!state)
return -ENOMEM;
- state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc);
-retry:
+ state->acquire_ctx = ctx;
plane_state = drm_atomic_get_plane_state(state, plane);
if (IS_ERR(plane_state)) {
ret = PTR_ERR(plane_state);
@@ -2127,24 +2126,8 @@ int drm_atomic_helper_update_plane(struct drm_plane *plane,
ret = drm_atomic_commit(state);
fail:
- if (ret == -EDEADLK)
- goto backoff;
-
drm_atomic_state_put(state);
return ret;
-
-backoff:
- drm_atomic_state_clear(state);
- drm_atomic_legacy_backoff(state);
-
- /*
- * Someone might have exchanged the framebuffer while we dropped locks
- * in the backoff code. We need to fix up the fb refcount tracking the
- * core does for us.
- */
- plane->old_fb = plane->fb;
-
- goto retry;
}
EXPORT_SYMBOL(drm_atomic_helper_update_plane);
@@ -2165,23 +2148,11 @@ int drm_atomic_helper_disable_plane(struct drm_plane *plane,
struct drm_plane_state *plane_state;
int ret = 0;
- /*
- * FIXME: Without plane->crtc set we can't get at the implicit legacy
- * acquire context. The real fix will be to wire the acquire ctx through
- * everywhere we need it, but meanwhile prevent chaos by just skipping
- * this noop. The critical case is the cursor ioctls which a) only grab
- * crtc/cursor-plane locks (so we need the crtc to get at the right
- * acquire context) and b) can try to disable the plane multiple times.
- */
- if (!plane->crtc)
- return 0;
-
state = drm_atomic_state_alloc(plane->dev);
if (!state)
return -ENOMEM;
- state->acquire_ctx = drm_modeset_legacy_acquire_ctx(plane->crtc);
-retry:
+ state->acquire_ctx = ctx;
plane_state = drm_atomic_get_plane_state(state, plane);
if (IS_ERR(plane_state)) {
ret = PTR_ERR(plane_state);
@@ -2197,24 +2168,8 @@ int drm_atomic_helper_disable_plane(struct drm_plane *plane,
ret = drm_atomic_commit(state);
fail:
- if (ret == -EDEADLK)
- goto backoff;
-
drm_atomic_state_put(state);
return ret;
-
-backoff:
- drm_atomic_state_clear(state);
- drm_atomic_legacy_backoff(state);
-
- /*
- * Someone might have exchanged the framebuffer while we dropped locks
- * in the backoff code. We need to fix up the fb refcount tracking the
- * core does for us.
- */
- plane->old_fb = plane->fb;
-
- goto retry;
}
EXPORT_SYMBOL(drm_atomic_helper_disable_plane);