[PATCH 19/28] drm: support more than one write fence in drm_gem_plane_helper_prepare_fb
From: "Christian König" <ckoenig.leichtzumerken@gmail.com>
Date: 2021-11-29 13:27:17
Also in:
dri-devel
Subsystem:
drm drivers, drm drivers and misc gpu patches, the rest · Maintainers:
David Airlie, Simona Vetter, Maarten Lankhorst, Maxime Ripard, Thomas Zimmermann, Linus Torvalds
Use dma_resv_get_singleton() here to eventually get more than one write fence as single fence. Signed-off-by: Christian König <christian.koenig@amd.com> --- drivers/gpu/drm/drm_gem_atomic_helper.c | 18 +++++++----------- 1 file changed, 7 insertions(+), 11 deletions(-)
diff --git a/drivers/gpu/drm/drm_gem_atomic_helper.c b/drivers/gpu/drm/drm_gem_atomic_helper.c
index c3189afe10cb..9338ddb7edff 100644
--- a/drivers/gpu/drm/drm_gem_atomic_helper.c
+++ b/drivers/gpu/drm/drm_gem_atomic_helper.c@@ -143,25 +143,21 @@ */ int drm_gem_plane_helper_prepare_fb(struct drm_plane *plane, struct drm_plane_state *state) { - struct dma_resv_iter cursor; struct drm_gem_object *obj; struct dma_fence *fence; + int ret; if (!state->fb) return 0; obj = drm_gem_fb_get_obj(state->fb, 0); - dma_resv_iter_begin(&cursor, obj->resv, false); - dma_resv_for_each_fence_unlocked(&cursor, fence) { - /* TODO: Currently there should be only one write fence, so this - * here works fine. But drm_atomic_set_fence_for_plane() should - * be changed to be able to handle more fences in general for - * multiple BOs per fb anyway. */ - dma_fence_get(fence); - break; - } - dma_resv_iter_end(&cursor); + ret = dma_resv_get_singleton(obj->resv, false, &fence); + if (ret) + return ret; + /* TODO: drm_atomic_set_fence_for_plane() should be changed to be able + * to handle more fences in general for multiple BOs per fb. + */ drm_atomic_set_fence_for_plane(state, fence); return 0; }
--
2.25.1