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drm/fence: add fence to drm_pending_event

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Now a drm_pending_event can either send a real drm_event or signal a
fence, or both. It allow us to signal via fences when the buffer is
displayed on the screen. Which in turn means that the previous buffer
is not in use anymore and can be freed or sent back to another driver
for processing.

v2: Comments from Daniel Vetter
	- call fence_signal in drm_send_event_locked()
	- remove unneeded !e->event check

v3: Remove drm_pending_event->destroy to fix a leak when e->file_priv
is not set.

Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk> (v2)
[danvet: fix one e->destroy in arcpgu due to rebasing.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1464818821-5736-13-git-send-email-daniel.vetter@ffwll.ch
This commit is contained in:
Gustavo Padovan
2016-06-02 00:06:35 +02:00
committed by Daniel Vetter
parent 60c9e19003
commit 1b47aaf9a9
6 changed files with 26 additions and 17 deletions
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19
drivers/gpu/drm/drm_atomic.c
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@@ -1412,7 +1412,8 @@ EXPORT_SYMBOL(drm_atomic_nonblocking_commit);
*/
static struct drm_pending_vblank_event *create_vblank_event(
struct drm_device *dev, struct drm_file *file_priv, uint64_t user_data)
struct drm_device *dev, struct drm_file *file_priv,
struct fence *fence, uint64_t user_data)
{
struct drm_pending_vblank_event *e = NULL;
int ret;
@@ -1425,12 +1426,17 @@ static struct drm_pending_vblank_event *create_vblank_event(
e->event.base.length = sizeof(e->event);
e->event.user_data = user_data;
ret = drm_event_reserve_init(dev, file_priv, &e->base, &e->event.base);
if (ret) {
kfree(e);
return NULL;
if (file_priv) {
ret = drm_event_reserve_init(dev, file_priv, &e->base,
&e->event.base);
if (ret) {
kfree(e);
return NULL;
}
}
e->base.fence = fence;
return e;
}
@@ -1670,7 +1676,8 @@ retry:
for_each_crtc_in_state(state, crtc, crtc_state, i) {
struct drm_pending_vblank_event *e;
e = create_vblank_event(dev, file_priv, arg->user_data);
e = create_vblank_event(dev, file_priv, NULL,
arg->user_data);
if (!e) {
ret = -ENOMEM;
goto out;