Now I have patched the android r10.3.1 to the android r10.3 base source .
when I test the dual video function, I found that it can't work
only one screen show the video as well as the screen is flicker
the property setup as below:
[rw.secfb.disable-overlay]: [1]
[rw.SIN_VIDEO_DUAL_UI]: [0]
[rw.DUAL_VIDEO_SIN_UI]: [1]
[rw.SECOND_DISPLAY_CONNECTED]: 1
[sys.SECOND_DISPLAY_ENABLED]: 1
but when I set the [rw.secfb.disable-overlay] to 0, the screen no flicker any more, but still one screen show the video.
Are there any kernel option I haven't choosed.
Thanks you help advance!