From: Sean Paul <seanp...@chromium.org>
These functions were missing documentation.
Fixes the warning:
../include/drm/drm_modeset_helper_vtables.h:1000: warning: Function parameter
or member 'prepare_writeback_job' not described in 'drm_connector_helper_funcs'
../include/drm/drm_modeset_helper_vtables.h:1000: warning: Function parameter
or member 'cleanup_writeback_job' not described in 'drm_connector_helper_funcs'
Fixes: 9d2230dc1351 ("drm: writeback: Add job prepare and cleanup operations")
Cc: Laurent Pinchart <laurent.pinchart+rene...@ideasonboard.com>
Cc: Liviu Dudau <liviu.du...@arm.com>
Cc: Maarten Lankhorst <maarten.lankho...@linux.intel.com>
Cc: Maxime Ripard <maxime.rip...@bootlin.com>
Cc: Sean Paul <s...@poorly.run>
Cc: David Airlie <airl...@linux.ie>
Cc: Daniel Vetter <dan...@ffwll.ch>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Sean Paul <seanp...@chromium.org>
---
drivers/gpu/drm/drm_writeback.c | 20 ++++++++++++++++++++
include/drm/drm_modeset_helper_vtables.h | 20 ++++++++++++++++++++
2 files changed, 40 insertions(+)
diff --git a/drivers/gpu/drm/drm_writeback.c b/drivers/gpu/drm/drm_writeback.c
index 79ac014701c8..ef6f85966546 100644
--- a/drivers/gpu/drm/drm_writeback.c
+++ b/drivers/gpu/drm/drm_writeback.c
@@ -258,6 +258,15 @@ int drm_writeback_set_fb(struct drm_connector_state
*conn_state,
return 0;
}
+/**
+ * drm_writeback_prepare_job - Gives driver a chance to prepare for writeback
+ * @job: The writeback job to be prepared
+ *
+ * This function is called from &drm_atomic_helper_prepare_planes(), and allows
+ * the driver to setup the upcoming writeback job. The job will be
+ * destroyed/cleaned up in &drm_writeback_cleanup_job when the connector state
+ * is destroyed.
+ */
int drm_writeback_prepare_job(struct drm_writeback_job *job)
{
struct drm_writeback_connector *connector = job->connector;
@@ -310,6 +319,17 @@ void drm_writeback_queue_job(struct
drm_writeback_connector *wb_connector,
}
EXPORT_SYMBOL(drm_writeback_queue_job);
+/**
+ * drm_writeback_cleanup_job - Gives driver a chance to cleanup a writeback job
+ * @job: The writeback job to be cleaned up
+ *
+ * This function is called from &atomic_helper_connector_destroy_state() and
+ * allows the driver to clean up the now finished writeback job.
+ *
+ * Notice the asymmetry from prepare, this is called on destroy to
+ * ensure the job is not destroyed before than the writeback operation
+ * has completed.
+ */
void drm_writeback_cleanup_job(struct drm_writeback_job *job)
{
struct drm_writeback_connector *connector = job->connector;
diff --git a/include/drm/drm_modeset_helper_vtables.h
b/include/drm/drm_modeset_helper_vtables.h
index 8f3602811eb5..a0017f37ef55 100644
--- a/include/drm/drm_modeset_helper_vtables.h
+++ b/include/drm/drm_modeset_helper_vtables.h
@@ -992,8 +992,28 @@ struct drm_connector_helper_funcs {
void (*atomic_commit)(struct drm_connector *connector,
struct drm_connector_state *state);
+ /**
+ * @prepare_writeback_job:
+ *
+ * Called from &drm_atomic_helper_prepare_planes(), provides the driver
+ * a chance to setup things in preparation for a writeback job.
+ *
+ * This hook is optional.
+ */
int (*prepare_writeback_job)(struct drm_writeback_connector *connector,
struct drm_writeback_job *job);
+
+ /**
+ * @cleanup_writeback_job:
+ *
+ * Called from &drm_atomic_helper_connector_destroy_state(), and
+ * provides the driver an opportunity to cleanup the writeback job.
+ * Notice the asymmetry from prepare, this is called on destroy to
+ * ensure the job is not destroyed before than the writeback operation
+ * has completed.
+ *
+ * This hook is optional.
+ */
void (*cleanup_writeback_job)(struct drm_writeback_connector *connector,
struct drm_writeback_job *job);
};
--
Sean Paul, Software Engineer, Google / Chromium OS
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