[Ozone-Dri] Adding initial content protection support

ui/ozone/platform/dri/chromeos/native_display_delegate_dri.cc

Index: ui/ozone/platform/dri/chromeos/native_display_delegate_dri.cc
diff --git a/ui/ozone/platform/dri/chromeos/native_display_delegate_dri.cc b/ui/ozone/platform/dri/chromeos/native_display_delegate_dri.cc
index 58b5fb264ec9f982a2b7f49af20d9d60ade8f4d7..dd946e9a8296b583c3c5ecaa813c3c8da25b53b0 100644
--- a/ui/ozone/platform/dri/chromeos/native_display_delegate_dri.cc
+++ b/ui/ozone/platform/dri/chromeos/native_display_delegate_dri.cc
@@ -19,7 +19,36 @@
 namespace ui {
 
 namespace {
+
 const size_t kMaxDisplayCount = 2;
+
+const char kContentProtection[] = "Content Protection";
+
+struct ContentProtectionMapping {
+  const char* name;
+  HDCPState state;
+};
+
+const ContentProtectionMapping kContentProtectionStates[] = {
+    {"Undesired", HDCP_STATE_UNDESIRED},
+    {"Desired", HDCP_STATE_DESIRED},
+    {"Enabled", HDCP_STATE_ENABLED}};
+
+uint32_t GetContentProtectionValue(drmModePropertyRes* property,
+                                   HDCPState state) {
+  std::string name;
+  for (size_t i = 0; i < arraysize(kContentProtectionStates); ++i)
+    if (kContentProtectionStates[i].state == state)
+      name = kContentProtectionStates[i].name;

[alexst (slow to review), 2014/08/26 00:32:04]

Once you found a name, you should break.

[dnicoara, 2014/08/26 00:43:51]

Done.

+
+  for (int i = 0; i < property->count_enums; ++i)
+    if (name == property->enums[i].name)
+      return i;
+
+  NOTREACHED();
+  return 0;
+}
+
 }  // namespace
 
 NativeDisplayDelegateDri::NativeDisplayDelegateDri(
@@ -162,14 +191,63 @@ void NativeDisplayDelegateDri::CreateFrameBuffer(const gfx::Size& size) {}
 
 bool NativeDisplayDelegateDri::GetHDCPState(const DisplaySnapshot& output,
                                             HDCPState* state) {
-  NOTIMPLEMENTED();
+  const DisplaySnapshotDri& dri_output =
+      static_cast<const DisplaySnapshotDri&>(output);
+
+  ScopedDrmConnectorPtr connector(dri_->GetConnector(dri_output.connector()));
+  if (!connector) {
+    LOG(ERROR) << "Failed to get connector " << dri_output.connector();
+    return false;
+  }
+
+  ScopedDrmPropertyPtr hdcp_property(
+      dri_->GetProperty(connector.get(), kContentProtection));
+  if (!hdcp_property) {
+    LOG(ERROR) << "'" << kContentProtection << "' property doesn't exist.";
+    return false;
+  }
+
+  DCHECK_LT(hdcp_property->prop_id, connector->count_props);
+  DCHECK_LT(connector->prop_values[hdcp_property->prop_id],
+            hdcp_property->count_enums);
+
+  std::string name(
+      hdcp_property->enums[connector->prop_values[hdcp_property->prop_id]]

[alexst (slow to review), 2014/08/26 00:32:04]

nit: it was a bit hard for me to parse this, maybe unroll this with local vars
to help readability?

[dnicoara, 2014/08/26 00:43:51]

Done.

+          .name);
+  for (size_t i = 0; i < arraysize(kContentProtectionStates); ++i) {
+    if (name == kContentProtectionStates[i].name) {
+      *state = kContentProtectionStates[i].state;
+      VLOG(3) << "HDCP state: " << *state << " (" << name << ")";
+      return true;
+    }
+  }
+
+  LOG(ERROR) << "Unknown content protection value '" << name << "'";
   return false;
 }
 
 bool NativeDisplayDelegateDri::SetHDCPState(const DisplaySnapshot& output,
                                             HDCPState state) {
-  NOTIMPLEMENTED();
-  return false;
+  const DisplaySnapshotDri& dri_output =
+      static_cast<const DisplaySnapshotDri&>(output);
+
+  ScopedDrmConnectorPtr connector(dri_->GetConnector(dri_output.connector()));
+  if (!connector) {
+    LOG(ERROR) << "Failed to get connector " << dri_output.connector();
+    return false;
+  }
+
+  ScopedDrmPropertyPtr hdcp_property(
+      dri_->GetProperty(connector.get(), kContentProtection));
+  if (!hdcp_property) {
+    LOG(ERROR) << "'" << kContentProtection << "' property doesn't exist.";
+    return false;
+  }
+
+  return dri_->SetProperty(
+      dri_output.connector(),
+      hdcp_property->prop_id,
+      GetContentProtectionValue(hdcp_property.get(), state));
 }
 
 std::vector<ui::ColorCalibrationProfile>