android display debug summary

【android display debug summary】不操千曲而后晓声，观千剑而后识器。这篇文章主要讲述android display debug summary相关的知识，希望能为你提供帮助。

please ensure the kernel initial ok. modetest -c can find device.
for some issue, hdmi need check IO, please remove the IO in dtb and code.
if kernel can find devices,but android cannot (dumpsys SurfaceFlinger )
Please run below commands:

adb root adb remount adb shell ‘echo "ro.hwc.primary.conn=Unknown" > > /system/build.prop‘ adb shell sync adb reboot

for some reason, hwc composite by DSS ,it‘s unstable.

Display[0] configurations (* current): * 0: 1280x800, xdpi=150.000000, ydpi=150.000000, refresh=16666666, colorMode=0 numHwLayers=4, flags=00000000 type|handle| hint | flag | tr | blnd |format|source crop (l,t,r,b)|frame| name -----------+----------+------+------+----+------+-------------+--------------------------------+------------------------+------ HWC | add24160 | 0000 | 0000 | 00 | 0100 | RGBA_8888|0,0,1148,638 |30,30, 1178,668 | SurfaceView - android.car.cluster.sample/android.car.cluster.sample.MainClusterActivity#0 HWC | add243a0 | 0000 | 0000 | 00 | 0105 | RGBA_8888|0,0,1208,800 |0,0, 1208,800 | android.car.cluster.sample/android.car.cluster.sample.MainClusterActivity#0 HWC | add24820 | 0000 | 0000 | 00 | 0105 | RGBA_8888|0,0,72,800 | 1208,0, 1280,800 | CarNavigationBar#0 FB TARGET | add23080 | 0000 | 0000 | 00 | 0105 | RGBA_8888|0,0,1280,800 |0,0, 1280,800 | HWC_FRAMEBUFFER_TARGET Display[1] configurations (* current): * 0: 1280x720, xdpi=75.000000, ydpi=75.000000, refresh=16666666, colorMode=0 numHwLayers=4, flags=00000000 type|handle| hint | flag | tr | blnd |format|source crop (l,t,r,b)|frame| name -----------+----------+------+------+----+------+-------------+--------------------------------+------------------------+------ GLES | add24160 | 0000 | 0000 | 00 | 0100 | RGBA_8888|0,0,1148,638 |91,27, 1124,601 | SurfaceView - android.car.cluster.sample/android.car.cluster.sample.MainClusterActivity#0 GLES | add243a0 | 0000 | 0000 | 00 | 0105 | RGBA_8888|0,0,1208,800 |64,0, 1151,720 | android.car.cluster.sample/android.car.cluster.sample.MainClusterActivity#0 GLES | add24820 | 0000 | 0000 | 00 | 0105 | RGBA_8888|0,0,72,800 | 1151,0, 1216,720 | CarNavigationBar#0 FB TARGET | add239e0 | 0000 | 0000 | 00 | 0105 | RGBA_8888|0,0,1280,720 |0,0, 1280,720 | HWC_FRAMEBUFFER_TARGET Allocated buffers:

set GLES use below commands.
setprop persist.hwc.dss.comp 0