From 13b55664eec7b85607c4ab9d26a62b4af413a771 Mon Sep 17 00:00:00 2001 From: Gustavo Padovan Date: Mon, 7 Nov 2016 19:03:30 +0900 Subject: drm/atomic: add drm_atomic_set_fence_for_plane() This new function should be used by drivers when setting a implicit fence for the plane. It abstracts the fact that the user might have chosen explicit fencing instead. Signed-off-by: Gustavo Padovan Reviewed-by: Daniel Vetter Signed-off-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/1478513013-3221-1-git-send-email-gustavo@padovan.org --- drivers/gpu/drm/drm_atomic.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) (limited to 'drivers/gpu/drm/drm_atomic.c') diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c index c32fb3c..5e73954 100644 --- a/drivers/gpu/drm/drm_atomic.c +++ b/drivers/gpu/drm/drm_atomic.c @@ -1147,6 +1147,36 @@ drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state, EXPORT_SYMBOL(drm_atomic_set_fb_for_plane); /** + * drm_atomic_set_fence_for_plane - set fence for plane + * @plane_state: atomic state object for the plane + * @fence: dma_fence to use for the plane + * + * Helper to setup the plane_state fence in case it is not set yet. + * By using this drivers doesn't need to worry if the user choose + * implicit or explicit fencing. + * + * This function will not set the fence to the state if it was set + * via explicit fencing interfaces on the atomic ioctl. It will + * all drope the reference to the fence as we not storing it + * anywhere. + * + * Otherwise, if plane_state->fence is not set this function we + * just set it with the received implict fence. + */ +void +drm_atomic_set_fence_for_plane(struct drm_plane_state *plane_state, + struct dma_fence *fence) +{ + if (plane_state->fence) { + dma_fence_put(fence); + return; + } + + plane_state->fence = fence; +} +EXPORT_SYMBOL(drm_atomic_set_fence_for_plane); + +/** * drm_atomic_set_crtc_for_connector - set crtc for connector * @conn_state: atomic state object for the connector * @crtc: crtc to use for the connector -- cgit v1.1