drm_hwcomposer: Add HDMI connector as a valid type

Accept DRM_MODE_CONNECTOR_HDMIA connector type.

Look for primary DrmConnector amongst external connectors
after looking for primary amongst internal ones first.

Change-Id: I494bc5759cc699a83611374d3650d0c8625fedfb
Signed-off-by: Robert Foss <robert.foss@collabora.com>

3 files changed, 26 insertions, 4 deletions

diff --git a/drmconnector.cpp b/drmconnector.cpp
index 38b4f9b..a71683f 100644
--- a/drmconnector.cpp
+++ b/drmconnector.cpp
@@ -67,11 +67,19 @@ void DrmConnector::set_display(int display) {
   display_ = display;
 }
 
-bool DrmConnector::built_in() const {
+bool DrmConnector::internal() const {
   return type_ == DRM_MODE_CONNECTOR_LVDS || type_ == DRM_MODE_CONNECTOR_eDP ||
          type_ == DRM_MODE_CONNECTOR_DSI || type_ == DRM_MODE_CONNECTOR_VIRTUAL;
 }
 
+bool DrmConnector::external() const {
+  return type_ == DRM_MODE_CONNECTOR_HDMIA;
+}
+
+bool DrmConnector::valid_type() const {
+  return internal() || external();
+}
+
 int DrmConnector::UpdateModes() {
   int fd = drm_->fd();
 
diff --git a/drmconnector.h b/drmconnector.h
index e1488bb..5601e06 100644
--- a/drmconnector.h
+++ b/drmconnector.h
@@ -44,7 +44,9 @@ class DrmConnector {
   int display() const;
   void set_display(int display);
 
-  bool built_in() const;
+  bool internal() const;
+  bool external() const;
+  bool valid_type() const;
 
   int UpdateModes();
 
diff --git a/drmresources.cpp b/drmresources.cpp
index 0578cc6..17c912a 100644
--- a/drmresources.cpp
+++ b/drmresources.cpp
@@ -154,16 +154,28 @@ int DrmResources::Init() {
       break;
     }
 
-    if (conn->built_in() && !found_primary) {
+    connectors_.emplace_back(std::move(conn));
+  }
+
+  // First look for primary amongst internal connectors
+  for (auto &conn : connectors_) {
+    if (conn->internal() && !found_primary) {
       conn->set_display(0);
       found_primary = true;
     } else {
       conn->set_display(display_num);
       ++display_num;
     }
+  }
 
-    connectors_.emplace_back(std::move(conn));
+  // Then look for primary amongst external connectors
+  for (auto &conn : connectors_) {
+    if (conn->external() && !found_primary) {
+      conn->set_display(0);
+      found_primary = true;
+    }
   }
+
   if (res)
     drmModeFreeResources(res);