gpu: support R16 GPUMemoryBuffer

ui/ozone/platform/drm/common/drm_util.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/ozone/platform/drm/common/drm_util.h"
 
 #include <drm_fourcc.h>
 #include <stdint.h>
 #include <stdlib.h>
 #include <sys/mman.h>
 #include <xf86drm.h>
 #include <xf86drmMode.h>
 #include <algorithm>
 #include <utility>
 
 #include "base/containers/flat_map.h"
 #include "base/memory/ptr_util.h"
 #include "ui/display/types/display_mode.h"
 #include "ui/display/types/display_snapshot_mojo.h"
 #include "ui/display/util/edid_parser.h"
 #include "ui/ozone/common/display_snapshot_proxy.h"
 
+#if !defined(DRM_FORMAT_R16)
+// TODO(riju): crbug.com/733703
+#define DRM_FORMAT_R16 fourcc_code('R', '1', '6', ' ')
+#endif
+
 namespace ui {
 
 namespace {
 
 static const size_t kDefaultCursorWidth = 64;
 static const size_t kDefaultCursorHeight = 64;
 
 bool IsCrtcInUse(
     uint32_t crtc,
     const std::vector<std::unique_ptr<HardwareDisplayControllerInfo>>&
@@ skipping 394 matching lines @@
 
     params.push_back(p);
   }
   return params;
 }
 
 int GetFourCCFormatFromBufferFormat(gfx::BufferFormat format) {
   switch (format) {
     case gfx::BufferFormat::R_8:
       return DRM_FORMAT_R8;
+    case gfx::BufferFormat::R_16:
+      return DRM_FORMAT_R16;
     case gfx::BufferFormat::RG_88:
       return DRM_FORMAT_GR88;
     case gfx::BufferFormat::RGBA_8888:
       return DRM_FORMAT_ABGR8888;
     case gfx::BufferFormat::RGBX_8888:
       return DRM_FORMAT_XBGR8888;
     case gfx::BufferFormat::BGRA_8888:
       return DRM_FORMAT_ARGB8888;
     case gfx::BufferFormat::BGRX_8888:
       return DRM_FORMAT_XRGB8888;
@@ skipping 66 matching lines @@
 
 MovableDisplaySnapshots CreateMovableDisplaySnapshotsFromParams(
     const std::vector<DisplaySnapshot_Params>& displays) {
   MovableDisplaySnapshots snapshots;
   for (const auto& d : displays)
     snapshots.push_back(base::MakeUnique<DisplaySnapshotProxy>(d));
   return snapshots;
 }
 
 }  // namespace ui