commit c3198ff918cfde8b065fc97ca7edb874d2489adb
author radhakrishna <radhakrishna@codeaurora.org> Tue Mar 10 17:10:02 2015 +0530
committer radhakrishna <radhakrishna@codeaurora.org> Thu Mar 19 15:27:03 2015 +0530
tree c47465a38cc592d43119005d0b4a75f724c94b13
parent 361b88f0c31d90b1966bc7371c2aee3e089185cb

hwc: Support for reading FB format from driver

- Instead of assuming the default format(RGBA_8888),
  read FB format from driver and pass the info to SF
- For now, this is limited to primary and HDMI only.
  WB FBformat is assumed to be in RGBA_8888
- If FB doesn't have alpha channel, disable mixed mode

Change-Id: Iefc0080819749b541483ea47357bb37ec150c544

libhwcomposer/hwc.cpp

diff --git a/libhwcomposer/hwc.cpp b/libhwcomposer/hwc.cpp
index adf48e7..a934f3e 100644
--- a/libhwcomposer/hwc.cpp
+++ b/libhwcomposer/hwc.cpp
@@ -805,6 +805,9 @@
         HWC_DISPLAY_DPI_X,
         HWC_DISPLAY_DPI_Y,
         HWC_DISPLAY_SECURE,
+#ifdef GET_FRAMEBUFFER_FORMAT_FROM_HWC
+        HWC_DISPLAY_FBFORMAT,
+#endif
         HWC_DISPLAY_NO_ATTRIBUTE,
     };
 
@@ -855,6 +858,11 @@
         case HWC_DISPLAY_SECURE:
             values[i] = (int32_t) (ctx->dpyAttr[disp].secure);
             break;
+#ifdef GET_FRAMEBUFFER_FORMAT_FROM_HWC
+        case HWC_DISPLAY_FBFORMAT:
+            values[i] = ctx->dpyAttr[disp].fbformat;
+            break;
+#endif
         default:
             ALOGE("Unknown display attribute %d",
                     attributes[i]);