drm_hwcomposer: Add rotation support for hw planes

This patch adds support for transformed layers by using the
rotation property on drm planes.

Bug: chrome-os-partner:42093
Test: On smaug using
	adb shell content insert --uri content://settings/system --bind name:s:user_rotation --bind value:i:<R>

Change-Id: I86bb8ef2f77b5d046a5fddd57db4b87070b5801f
Signed-off-by: Sean Paul <seanpaul@chromium.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/drmplane.cpp b/drmplane.cpp
index d6ac875..3f17d7c 100644
--- a/drmplane.cpp
+++ b/drmplane.cpp
@@ -120,6 +120,10 @@ int DrmPlane::Init() {
     return ret;
   }
 
+  ret = drm_->GetPlaneProperty(*this, "rotation", &rotation_property_);
+  if (ret)
+    ALOGE("Could not get rotation property");
+
   return 0;
 }
 
@@ -174,4 +178,8 @@ const DrmProperty &DrmPlane::src_w_property() const {
 const DrmProperty &DrmPlane::src_h_property() const {
   return src_h_property_;
 }
+
+const DrmProperty &DrmPlane::rotation_property() const {
+  return rotation_property_;
+}
 }