Add GBM_BO_USE_HW_VIDEO_ENCODER use flag
Chrome needs to allocate a linear buffer that a hardware video encoder can read
and cpu can read and write. There is no use flag in gbm that specifies the
former. This CL introduces a new use flag for that.
BUG=b:138703716
TEST=None
Change-Id: Ied0321914a366294a47e4fc5c2a8f08ee0351bd8
Reviewed-on: https://chromium-review.googlesource.com/1728729
Tested-by: Hirokazu Honda <hiroh@chromium.org>
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Legacy-Commit-Queue: Commit Bot <commit-bot@chromium.org>
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
diff --git a/i915.c b/i915.c
index 6a36ae9..44f08f8 100644
--- a/i915.c
+++ b/i915.c
@@ -138,6 +138,13 @@
ARRAY_SIZE(tileable_texture_source_formats), &metadata,
texture_use_flags);
+ /*
+ * Chrome uses DMA-buf mmap to write to YV12 buffers, which are then accessed by the
+ * Video Encoder Accelerator (VEA). It could also support NV12 potentially in the future.
+ */
+ drv_modify_combination(drv, DRM_FORMAT_YVU420, &metadata, BO_USE_HW_VIDEO_ENCODER);
+ drv_modify_combination(drv, DRM_FORMAT_NV12, &metadata, BO_USE_HW_VIDEO_ENCODER);
+
/* Android CTS tests require this. */
drv_add_combination(drv, DRM_FORMAT_BGR888, &metadata, BO_USE_SW_MASK);