I have a customized imx6dl sabresd board（Android4.2.2）。
I refered to imx6dl HDMI can't support 1024x768 , and now I can get 1024 x768 resolution through HDMI。
But there is no HDMI sound output when I choose 1024x768。
（If I choose 720p，There is sound output through HDMI）
I want to know why, and how to fix it?