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[RESEND,v4,1/3] drm/atomic: Allow userspace to use explicit sync with atomic async flips

Message ID 20240308145553.194165-2-andrealmeid@igalia.com (mailing list archive)
State New, archived
Headers show
Series drm/atomic: Allow drivers to write their own plane check for async | expand

Commit Message

André Almeida March 8, 2024, 2:55 p.m. UTC 
Allow userspace to use explicit synchronization with atomic async flips.
That means that the flip will wait for some hardware fence, and then
will flip as soon as possible (async) in regard of the vblank.

Signed-off-by: André Almeida <andrealmeid@igalia.com>
---
v4: no changes

 drivers/gpu/drm/drm_atomic_uapi.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
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Patch

diff --git a/drivers/gpu/drm/drm_atomic_uapi.c b/drivers/gpu/drm/drm_atomic_uapi.c
index 29d4940188d4..1eecfb9e240d 100644
--- a/drivers/gpu/drm/drm_atomic_uapi.c
+++ b/drivers/gpu/drm/drm_atomic_uapi.c
@@ -1066,7 +1066,9 @@  int drm_atomic_set_property(struct drm_atomic_state *state,
 			break;
 		}
 
-		if (async_flip && prop != config->prop_fb_id) {
+		if (async_flip &&
+		    prop != config->prop_fb_id &&
+		    prop != config->prop_in_fence_fd) {
 			ret = drm_atomic_plane_get_property(plane, plane_state,
 							    prop, &old_val);
 			ret = drm_atomic_check_prop_changes(ret, old_val, prop_value, prop);