NotForReview: Implement zero/one-copy texture for ozone freon using Intel DRM

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

Index: ui/ozone/platform/drm/common/client_native_pixmap_factory_gbm.cc
diff --git a/ui/ozone/platform/drm/common/client_native_pixmap_factory_gbm.cc b/ui/ozone/platform/drm/common/client_native_pixmap_factory_gbm.cc
index 7a943413b2605139256e5efe9630c33d7b2b0080..1aad682cd45e673eb80d40adc2375d2c3bf9cc11 100644
--- a/ui/ozone/platform/drm/common/client_native_pixmap_factory_gbm.cc
+++ b/ui/ozone/platform/drm/common/client_native_pixmap_factory_gbm.cc
@@ -11,6 +11,10 @@
 
 #if defined(OZONE_USE_VGEM_MAP)
 #include "ui/ozone/platform/drm/gpu/client_native_pixmap_vgem.h"
+
+#include "base/command_line.h"
+#include "ui/ozone/platform/drm/gpu/intel_drm_pixmap.h"
+#include "ui/ozone/public/ozone_switches.h"
 #endif
 
 namespace ui {
@@ -22,10 +26,15 @@ class ClientNativePixmapFactoryGbm : public ClientNativePixmapFactory {
   ClientNativePixmapFactoryGbm() {
 #if defined(OZONE_USE_VGEM_MAP)
     // TODO(dshwang): remove ad-hoc file open. crrev.com/1248713002
+    static const char kRenderNodePath[] = "/dev/dri/renderD128";
     static const char kVgemPath[] = "/dev/dri/renderD129";
-    int vgem_fd = open(kVgemPath, O_RDWR | O_CLOEXEC);
+    bool enable_intel_drm = base::CommandLine::ForCurrentProcess()->HasSwitch(
+        switches::kOzoneUseIntelDrm);
+    int vgem_fd = open(enable_intel_drm ? kRenderNodePath : kVgemPath,
+                       O_RDWR | O_CLOEXEC);
     if (vgem_fd < 0) {
-      PLOG(ERROR) << "Failed to open: " << kVgemPath;
+      PLOG(ERROR) << "Failed to open: "
+                  << (enable_intel_drm ? kRenderNodePath : kVgemPath);
       return;
     }
     vgem_fd_.reset(vgem_fd);
@@ -63,6 +72,14 @@ class ClientNativePixmapFactoryGbm : public ClientNativePixmapFactory {
     DCHECK_GE(vgem_fd_.get(), 0);
     DCHECK(format == gfx::BufferFormat::BGRA_8888);
     DCHECK(usage == gfx::BufferUsage::MAP);
+
+    bool enable_intel_drm = base::CommandLine::ForCurrentProcess()->HasSwitch(
+        switches::kOzoneUseIntelDrm);
+    if (enable_intel_drm) {
+      return IntelDrmClientPixmap::CreateFromHandle(
+          handle, base::FileDescriptor(vgem_fd_.get(), false), format, size);
+    }
+
     return ClientNativePixmapVgem::Create(
         handle, base::FileDescriptor(vgem_fd_.get(), false), size);
 #else