cros/drm: Add RG and YUV formats for SCANOUT_CPU_READ_WRITE

On intel, we want to be able to use SCANOUT_CPU_READ_WRITE with
GMBs videoframes (cfr ).

This CL adds YUV_420_BIPLANAR and other supported formats to
SCANOUT_CPU_READ_WRITE.

Bug: b/71837407
Change-Id: I1fcb5148ce71c2eeb90feb8ccc0b7378e9f1b0b8
Reviewed-on: https://chromium-review.googlesource.com/889846Reviewed-by: David Reveman <reveman@chromium.org>
Commit-Queue: Daniele Castagna <dcastagna@chromium.org>
Cr-Commit-Position: refs/heads/master@{#532256}

ui/gfx/linux/client_native_pixmap_factory_dmabuf.cc

@@ -9,6 +9,7 @@
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/trace_event/trace_event.h"
+#include "build/build_config.h"
 #include "ui/gfx/native_pixmap_handle.h"
 
 #if defined(OS_CHROMEOS)
@@ -64,10 +65,19 @@ class ClientNativePixmapFactoryDmabuf : public ClientNativePixmapFactory {
         return format == gfx::BufferFormat::BGRX_8888 ||
                format == gfx::BufferFormat::RGBX_8888;
       case gfx::BufferUsage::SCANOUT_CPU_READ_WRITE:
-        return format == gfx::BufferFormat::BGRX_8888 ||
-               format == gfx::BufferFormat::BGRA_8888 ||
-               format == gfx::BufferFormat::RGBX_8888 ||
-               format == gfx::BufferFormat::RGBA_8888;
+        return
+#if defined(ARCH_CPU_X86_FAMILY)
+            // Currently only Intel driver (i.e. minigbm and Mesa) supports R_8
+            // RG_88 and NV12. https://crbug.com/356871
+            format == gfx::BufferFormat::R_8 ||
+            format == gfx::BufferFormat::RG_88 ||
+            format == gfx::BufferFormat::YUV_420_BIPLANAR ||
+#endif
+
+            format == gfx::BufferFormat::BGRX_8888 ||
+            format == gfx::BufferFormat::BGRA_8888 ||
+            format == gfx::BufferFormat::RGBX_8888 ||
+            format == gfx::BufferFormat::RGBA_8888;
       case gfx::BufferUsage::SCANOUT_VDA_WRITE:
         return false;
       case gfx::BufferUsage::GPU_READ_CPU_READ_WRITE: