Wait for all write operations before page flipping.
Signed-off-by: Christian König <christian.koenig@xxxxxxx>
---
drivers/gpu/drm/i915/intel_display.c | 28 ++++++++++++++++++++++++++--
1 file changed, 26 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 2c16c3a3cdea..154dc86062a3 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -48,6 +48,7 @@
#include <drm/drm_rect.h>
#include <linux/dma_remapping.h>
#include <linux/reservation.h>
+#include <linux/dma-fence-array.h>
/* Primary plane formats for gen <= 3 */
static const uint32_t i8xx_primary_formats[] = {
@@ -13022,7 +13023,8 @@ intel_prepare_plane_fb(struct drm_plane *plane,
intel_fb_obj_flush(obj, ORIGIN_DIRTYFB);
if (!new_state->fence) { /* implicit fencing */
- struct dma_fence *fence;
+ struct dma_fence *fence, **fences;
+ unsigned count;
ret = i915_sw_fence_await_reservation(&intel_state->commit_ready,
obj->resv, NULL,
@@ -13031,7 +13033,29 @@ intel_prepare_plane_fb(struct drm_plane *plane,
if (ret < 0)
return ret;
- fence = reservation_object_get_excl_rcu(obj->resv);
+ ret = reservation_object_get_fences_rcu(obj->resv, true, NULL,
+ &count, &fences);
+ if (ret)
+ return ret;
+
+ if (count == 0) {
+ fence = NULL;
+ } else if (count == 1) {
+ fence = fences[0];
+ kfree(fences);
+ } else {
+ uint64_t context = dma_fence_context_alloc(1);
+ struct dma_fence_array *array;
+
+ array = dma_fence_array_create(count, fences, context,
+ 1, false);
+ if (!array) {
+ kfree(fences);
+ return -ENOMEM;
+ }
+ fence = &array->base;
+ }
+
if (fence) {
add_rps_boost_after_vblank(new_state->crtc, fence);
dma_fence_put(fence);
--
2.14.1
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