minigbm: amdgpu: Add formats R8, GR88

Add R8 and GR88 format for dma_bufs in amdgpu.
Required to support native GMB video playback.
If native GMB is enbaled,chrome transcodes NV12 to
RGB by importing Y plane as R8 EGLImage and the UV plane as GR88 EGLImage.

BUG=b:65302612
TEST=Boot Kahlee with --enable-native-gpu-memory-buffers and play youtube.

Change-Id: Ifa7e50959bb5417088357a0c0aa3ac874ecf6fc9
Signed-off-by: Deepak Sharma <deepak.sharma@amd.com>
Reviewed-on: https://chromium-review.googlesource.com/695850
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
diff --git a/amdgpu.c b/amdgpu.c
index 1210d1f..8448968 100644
--- a/amdgpu.c
+++ b/amdgpu.c
@@ -44,7 +44,8 @@
 const static uint32_t render_target_formats[] = { DRM_FORMAT_ARGB8888, DRM_FORMAT_XBGR8888,
 						  DRM_FORMAT_XRGB8888 };
 
-const static uint32_t texture_source_formats[] = { DRM_FORMAT_NV21, DRM_FORMAT_NV12 };
+const static uint32_t texture_source_formats[] = { DRM_FORMAT_GR88, DRM_FORMAT_R8,
+						   DRM_FORMAT_NV21, DRM_FORMAT_NV12 };
 
 static int amdgpu_set_metadata(int fd, uint32_t handle, struct amdgpu_bo_metadata *info)
 {