[RK3288][Android6.0] 调试笔记 --- display数据帧的dump

Platform: Rockchip
OS: Android 6.0
Kernel: 3.10.92

步骤：
1. 打开dump功能
hardware/rockchip/hwcomposer/rk_hwcomposer.h
#define hwcDumpSurface 1
2. 设置property
#setprop sys.dump true
这时logcat中就可以看到dump的log了：
01-02 07:48:40.439 175 175 I hwcomposer: dump surface layername /data/dump/dmlayer0_2048_1536_4.bin,w:2048,h:1536,formatsize :4
01-02 07:48:40.625 175 175 I hwcomposer: dump surface layername /data/dump/dmlayer1_ftl_2048_1536_4.bin,w:2048,h:1536,formatsize :4
抓取的帧会按数字排列，还带分辨率参数。如果再设置sys.dump，那么就是dmlayer2_xxx.bin, dmlayer3_xxx.bin ……
3. 抓到pc
adb pull /data/dump/
4. 抓到的bin文件可以用软件7yuv打开查看，格式设定为RGBA8888

源代码：

#if hwcDumpSurface
static void
_DumpSurface(
    hwc_display_contents_1_t* list
    )
{
    char pro_value[PROPERTY_VALUE