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authorBrian Starkey <brian.starkey@arm.com>2017-03-29 19:42:33 +0300
committerLiviu Dudau <Liviu.Dudau@arm.com>2018-06-20 17:29:18 +0300
commitb13cc8dd588434e2aec781e6d12224e4c408ac18 (patch)
treec202a3e17b01d1db38cebd680dd7d5cdc0f641cf /include/drm/drm_writeback.h
parent935774cd71fe604cc8ed24adcb507d7784255672 (diff)
downloadlinux-b13cc8dd588434e2aec781e6d12224e4c408ac18.tar.xz
drm: writeback: Add out-fences for writeback connectors
Add the WRITEBACK_OUT_FENCE_PTR property to writeback connectors, to enable userspace to get a fence which will signal once the writeback is complete. It is not allowed to request an out-fence without a framebuffer attached to the connector. A timeline is added to drm_writeback_connector for use by the writeback out-fences. In the case of a commit failure or DRM_MODE_ATOMIC_TEST_ONLY, the fence is set to -1. Changes from v2: - Rebase onto Gustavo Padovan's v9 explicit sync series - Change out_fence_ptr type to s32 __user * - Set *out_fence_ptr to -1 in drm_atomic_connector_set_property - Store fence in drm_writeback_job Gustavo Padovan: - Move out_fence_ptr out of connector_state - Signal fence from drm_writeback_signal_completion instead of in driver directly Changes from v3: - Rebase onto commit 7e9081c5aac7 ("drm/fence: fix memory overwrite when setting out_fence fd") (change out_fence_ptr to s32 __user *, for real this time.) - Update documentation around WRITEBACK_OUT_FENCE_PTR Signed-off-by: Brian Starkey <brian.starkey@arm.com> [rebased and fixed conflicts] Signed-off-by: Mihail Atanassov <mihail.atanassov@arm.com> Signed-off-by: Liviu Dudau <liviu.dudau@arm.com> Reviewed-by: Eric Anholt <eric@anholt.net> Reviewed-by: Sean Paul <seanpaul@chromium.org> Link: https://patchwork.freedesktop.org/patch/229036/
Diffstat (limited to 'include/drm/drm_writeback.h')
-rw-r--r--include/drm/drm_writeback.h41
1 files changed, 40 insertions, 1 deletions
diff --git a/include/drm/drm_writeback.h b/include/drm/drm_writeback.h
index 17cd1feecd7e..a10fe556dfd4 100644
--- a/include/drm/drm_writeback.h
+++ b/include/drm/drm_writeback.h
@@ -50,6 +50,32 @@ struct drm_writeback_connector {
* drm_writeback_signal_completion()
*/
struct list_head job_queue;
+
+ /**
+ * @fence_context:
+ *
+ * timeline context used for fence operations.
+ */
+ unsigned int fence_context;
+ /**
+ * @fence_lock:
+ *
+ * spinlock to protect the fences in the fence_context.
+ */
+ spinlock_t fence_lock;
+ /**
+ * @fence_seqno:
+ *
+ * Seqno variable used as monotonic counter for the fences
+ * created on the connector's timeline.
+ */
+ unsigned long fence_seqno;
+ /**
+ * @timeline_name:
+ *
+ * The name of the connector's fence timeline.
+ */
+ char timeline_name[32];
};
struct drm_writeback_job {
@@ -75,6 +101,13 @@ struct drm_writeback_job {
* directly, use drm_atomic_set_writeback_fb_for_connector()
*/
struct drm_framebuffer *fb;
+
+ /**
+ * @out_fence:
+ *
+ * Fence which will signal once the writeback has completed
+ */
+ struct dma_fence *out_fence;
};
int drm_writeback_connector_init(struct drm_device *dev,
@@ -87,5 +120,11 @@ void drm_writeback_queue_job(struct drm_writeback_connector *wb_connector,
struct drm_writeback_job *job);
void drm_writeback_cleanup_job(struct drm_writeback_job *job);
-void drm_writeback_signal_completion(struct drm_writeback_connector *wb_connector);
+
+void
+drm_writeback_signal_completion(struct drm_writeback_connector *wb_connector,
+ int status);
+
+struct dma_fence *
+drm_writeback_get_out_fence(struct drm_writeback_connector *wb_connector);
#endif