From: Daniel Vetter <daniel.vetter@xxxxxxxx>
This was somehow lost between v3 and the merged version in Maarten's
patch merged as:
commit f2d580b9a8149735cbc4b59c4a8df60173658140
Author: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
Date: Wed May 4 14:38:26 2016 +0200
drm/core: Do not preserve framebuffer on rmfb, v4.
Actual code copied from Maarten's patch, but with the slight change to
just use dev->mode_config.funcs->atomic_commit to decide whether to
use the atomic path or not.
v2:
- Remove plane->fb assignment, done by drm_atomic_clean_old_fb.
- Add WARN_ON when atomic_remove_fb fails.
- Always call drm_atomic_state_put.
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/drm_atomic.c | 64 +++++++++++++++++++++++++++++++++++++
drivers/gpu/drm/drm_crtc_internal.h | 1 +
drivers/gpu/drm/drm_framebuffer.c | 7 ++++
3 files changed, 72 insertions(+)
diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index d1d252261bf1..23a3845542e1 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -2059,6 +2059,70 @@ static void complete_crtc_signaling(struct drm_device *dev,
kfree(fence_state);
}
+int drm_atomic_remove_fb(struct drm_framebuffer *fb)
+{
+ struct drm_modeset_acquire_ctx ctx;
+ struct drm_device *dev = fb->dev;
+ struct drm_atomic_state *state;
+ struct drm_plane *plane;
+ int ret = 0;
+ unsigned plane_mask;
+
+ state = drm_atomic_state_alloc(dev);
+ if (!state)
+ return -ENOMEM;
+
+ drm_modeset_acquire_init(&ctx, 0);
+ state->acquire_ctx = &ctx;
+
+retry:
+ plane_mask = 0;
+ ret = drm_modeset_lock_all_ctx(dev, &ctx);
+ if (ret)
+ goto unlock;
+
+ drm_for_each_plane(plane, dev) {
+ struct drm_plane_state *plane_state;
+
+ if (plane->state->fb != fb)
+ continue;
+
+ plane_state = drm_atomic_get_plane_state(state, plane);
+ if (IS_ERR(plane_state)) {
+ ret = PTR_ERR(plane_state);
+ goto unlock;
+ }
+
+ drm_atomic_set_fb_for_plane(plane_state, NULL);
+ ret = drm_atomic_set_crtc_for_plane(plane_state, NULL);
+ if (ret)
+ goto unlock;
+
+ plane_mask |= BIT(drm_plane_index(plane));
+
+ plane->old_fb = plane->fb;
+ }
+
+ if (plane_mask)
+ ret = drm_atomic_commit(state);
+
+unlock:
+ if (plane_mask)
+ drm_atomic_clean_old_fb(dev, plane_mask, ret);
+
+ if (ret == -EDEADLK) {
+ drm_modeset_backoff(&ctx);
+ goto retry;
+ }
+
+ drm_atomic_state_put(state);
+
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
+
+ return ret;
+}
+
int drm_mode_atomic_ioctl(struct drm_device *dev,
void *data, struct drm_file *file_priv)
{
diff --git a/drivers/gpu/drm/drm_crtc_internal.h b/drivers/gpu/drm/drm_crtc_internal.h
index cdf6860c9d22..121e250853d2 100644
--- a/drivers/gpu/drm/drm_crtc_internal.h
+++ b/drivers/gpu/drm/drm_crtc_internal.h
@@ -178,6 +178,7 @@ int drm_atomic_get_property(struct drm_mode_object *obj,
struct drm_property *property, uint64_t *val);
int drm_mode_atomic_ioctl(struct drm_device *dev,
void *data, struct drm_file *file_priv);
+int drm_atomic_remove_fb(struct drm_framebuffer *fb);
/* drm_plane.c */
diff --git a/drivers/gpu/drm/drm_framebuffer.c b/drivers/gpu/drm/drm_framebuffer.c
index cbf0c893f426..c358bf8280a8 100644
--- a/drivers/gpu/drm/drm_framebuffer.c
+++ b/drivers/gpu/drm/drm_framebuffer.c
@@ -770,6 +770,12 @@ void drm_framebuffer_remove(struct drm_framebuffer *fb)
* in this manner.
*/
if (drm_framebuffer_read_refcount(fb) > 1) {
+ if (dev->mode_config.funcs->atomic_commit) {
+ int ret = drm_atomic_remove_fb(fb);
+ WARN(ret, "atomic remove_fb failed with %i\n", ret);
+ goto out;
+ }
+
drm_modeset_lock_all(dev);
/* remove from any CRTC */
drm_for_each_crtc(crtc, dev) {
@@ -787,6 +793,7 @@ void drm_framebuffer_remove(struct drm_framebuffer *fb)
drm_modeset_unlock_all(dev);
}
+out:
drm_framebuffer_unreference(fb);
}
EXPORT_SYMBOL(drm_framebuffer_remove);
--
2.7.4
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