I'm a software engineer for maintaining the source code of BPI-R2 Linux 4.4 .x. Looks like you have a patch for enabling HDMI audio on R2 board, would you pleae share it with me? I'd like to add it it to github, thanks in advance.
Many thanks for your attention to your R2 products, you know a few features(wifi, bt and mipi) are not implemented yet in Linux 4.4.x, but we are working on them with MTK team, hope it will be ready soon.