From 3c28ff22f6e20cc946cb5a2b77d14862999f7ba0 Mon Sep 17 00:00:00 2001 From: Alex Goins Date: Wed, 25 Nov 2015 18:43:39 -0800 Subject: [PATCH] i915: wait for fence in prepare_plane_fb In intel_prepare_plane_fb, if fb is backed by dma-buf, wait for exclusive fence v2: First commit v3: Remove object_name_lock acquire Move wait from intel_atomic_commit() to intel_prepare_plane_fb() v4: Wait only on exclusive fences, interruptible with no timeout v5: Style tweaks to more closely match rest of file v6: Properly handle interrupted waits v7: No change v8: No change Link: https://patchwork.kernel.org/patch/7704181/ Signed-off-by: Alex Goins Signed-off-by: Maarten Lankhorst --- drivers/gpu/drm/i915/intel_display.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 0ad20eccbf62..01aae086b532 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -13690,6 +13690,17 @@ intel_prepare_plane_fb(struct drm_plane *plane, return ret; } + /* For framebuffer backed by dmabuf, wait for fence */ + if (obj && obj->base.dma_buf) { + ret = reservation_object_wait_timeout_rcu(obj->base.dma_buf->resv, + false, true, + MAX_SCHEDULE_TIMEOUT); + if (ret == -ERESTARTSYS) + return ret; + + WARN_ON(ret < 0); + } + if (!obj) { ret = 0; } else if (plane->type == DRM_PLANE_TYPE_CURSOR && -- 2.20.1