support 480/576 mode.

Bug: 17391301
BZ: 222162

Change-Id: I96ac2695455723978f5a7c4fb5b5f74c4719580f
Signed-off-by: Andy Qiu <junhai.qiu@intel.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/ips/tangier/TngDisplayQuery.cpp b/ips/tangier/TngDisplayQuery.cpp
index e2daa58..13350aa 100644..100755
--- a/ips/tangier/TngDisplayQuery.cpp
+++ b/ips/tangier/TngDisplayQuery.cpp
@@ -19,6 +19,7 @@
 #include <hal_public.h>
 #include <DisplayQuery.h>
 #include <khronos/openmax/OMX_IntelVideoExt.h>
+#include <Hwcomposer.h>
 
 
 namespace android {
@@ -57,6 +58,31 @@ uint32_t DisplayQuery::queryNV12Format()
     return HAL_PIXEL_FORMAT_NV12;
 }
 
+bool DisplayQuery::forceFbScaling(int device)
+{
+    // RGB planes don't support scaling. Panel fitter can be used to scale frame buffer to device's resolution
+    // if scaling factor is less than 1.5. Otherwise, GPU scaling is needed on RGB buffer, or hardware overlay
+    // scaling is needed on NV12 buffer
+
+    // this needs to work together with kernel driver. Panel fitter needs to be disabled if scaling factor is greater
+    // than 1.5
+
+    uint32_t width, height;
+    if (!Hwcomposer::getInstance().getDrm()->getDisplayResolution(device, width, height)) {
+        return false;
+    }
+
+    if (DEFAULT_DRM_FB_WIDTH / (float)width > 1.5) {
+        return true;
+    }
+
+    if (DEFAULT_DRM_FB_HEIGHT / (float)height > 1.5) {
+        return true;
+    }
+
+    return false;
+}
+
 } // namespace intel
 } // namespace android