commit 523eac571769e2ccf6412240700d51a1976b9d15
author Tatenda Chipeperekwa <tatendac@codeaurora.org> Thu May 29 14:58:39 2014 -0700
committer Tatenda Chipeperekwa <tatendac@codeaurora.org> Tue Jun 10 10:52:44 2014 -0700
tree 0f292fe98cdf5e3c411932f701ab23dc6e3b1256
parent 8f4e1a68ba5852b02a1810f9ceee735e59d669b2

hwc: vds: Add support to dump layers, FB and WB output buffer

1. Add hook to dump the layers going to VDS based virtual display.

2. Furthermore, add utility function to dump the frame buffer and
   WB output buffer. This will be enabled via a system property

   debug.hwc.enable_vds_dump

   Once dumping is enabled, the dumps can be extracted from

   /data/vds.fb.FORMAT.XRESxYRES.raw
   /data/vds.wb.FORMAT.XRESxYRES.raw

   e.g. vds.fb.MDP_RGBA_8888.1152x1920.raw

Change-Id: I2435c5507961a52929411206892c005492d5c193

libhwcomposer/hwc_virtual.cpp

diff --git a/libhwcomposer/hwc_virtual.cpp b/libhwcomposer/hwc_virtual.cpp
index adda35b..01c0873 100644
--- a/libhwcomposer/hwc_virtual.cpp
+++ b/libhwcomposer/hwc_virtual.cpp
@@ -29,6 +29,7 @@
 #include "hwc_dump_layers.h"
 #include "hwc_copybit.h"
 #include "hwc_virtual.h"
+#include "sync/sync.h"
 
 #define HWCVIRTUAL_LOG 0
 
@@ -48,6 +49,16 @@
     }
 }
 
+HWCVirtualVDS::HWCVirtualVDS() {
+    char value[PROPERTY_VALUE_MAX];
+    mVDSDumpEnabled = false;
+    if((property_get("debug.hwc.enable_vds_dump", value, NULL) > 0)) {
+        if(atoi(value) != 0) {
+            mVDSDumpEnabled = true;
+        }
+    }
+}
+
 void HWCVirtualVDS::init(hwc_context_t *ctx) {
     const int dpy = HWC_DISPLAY_VIRTUAL;
     ctx->mFBUpdate[dpy] =
@@ -178,6 +189,10 @@
             int fd = -1; //FenceFD from the Copybit
             hwc_sync(ctx, list, dpy, fd);
 
+            // Dump the layers for virtual
+            if(ctx->mHwcDebug[dpy])
+                ctx->mHwcDebug[dpy]->dumpLayers(list);
+
             if (!ctx->mMDPComp[dpy]->draw(ctx, list)) {
                 ALOGE("%s: MDPComp draw failed", __FUNCTION__);
                 ret = -1;
@@ -201,6 +216,19 @@
                 ret = -1;
             }
 
+            if(mVDSDumpEnabled) {
+                char bufferName[128];
+                // Dumping frame buffer
+                sync_wait(fbLayer->acquireFenceFd, 1000);
+                snprintf(bufferName, sizeof(bufferName), "vds.fb");
+                dumpBuffer((private_handle_t *)fbLayer->handle, bufferName);
+                // Dumping WB output for non-secure session
+                if(!isSecureBuffer(ohnd)) {
+                    sync_wait(list->retireFenceFd, 1000);
+                    snprintf(bufferName, sizeof(bufferName), "vds.wb");
+                    dumpBuffer(ohnd, bufferName);
+                }
+            }
         } else if(list->outbufAcquireFenceFd >= 0) {
             //If we dont handle the frame, set retireFenceFd to outbufFenceFd,
             //which will make sure, the framework waits on it and closes it.