From 2fac0f53fe5921264c525a0439ee9baf0fe9ada1 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Christian=20K=C3=B6nig?= Date: Tue, 2 Apr 2019 16:28:13 +0200 Subject: [PATCH] drm/amd/display: wait for fence without holding reservation lock MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Don't block others while waiting for the fences to finish, concurrent submission is perfectly valid in this case and holding the lock can prevent killed applications from terminating. Signed-off-by: Christian König Reviewed-by: Nicholas Kazlauskas Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index fb248984b7ba..36331e70fa83 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -5205,23 +5205,26 @@ static void amdgpu_dm_commit_planes(struct drm_atomic_state *state, continue; } + abo = gem_to_amdgpu_bo(fb->obj[0]); + + /* Wait for all fences on this FB */ + r = reservation_object_wait_timeout_rcu(abo->tbo.resv, true, + false, + MAX_SCHEDULE_TIMEOUT); + WARN_ON(r < 0); + /* * TODO This might fail and hence better not used, wait * explicitly on fences instead * and in general should be called for * blocking commit to as per framework helpers */ - abo = gem_to_amdgpu_bo(fb->obj[0]); r = amdgpu_bo_reserve(abo, true); if (unlikely(r != 0)) { DRM_ERROR("failed to reserve buffer before flip\n"); WARN_ON(1); } - /* Wait for all fences on this FB */ - WARN_ON(reservation_object_wait_timeout_rcu(abo->tbo.resv, true, false, - MAX_SCHEDULE_TIMEOUT) < 0); - amdgpu_bo_get_tiling_flags(abo, &tiling_flags); amdgpu_bo_unreserve(abo);