Hello,
I build a custom kernel using the following steps on tinkerboard 2S, but there is no sound from the HDMI-connected display.
(build almost according to Wiki - Developer Guide)
(1 to 3 were executed on ubuntu-x86_64)
1.source download
$ repo init -u https://github.com/TinkerBoard-Linux/rockchip-linux-manifest.git -b linux5.10-rk3399-debian11
$ repo sync
2.docker start
$ cd linux5.10-rk3399-debian11
$ ./docker_builder/docker-builder-run.sh
3.build
$ ./build.sh rockchip_rk3399_tinker_board_2_debian_defconfig
$ ./build.sh
4.bring kernel/boot.img to tinkerboard 2S launched using the released Tinker Board 2/2S Debian 11 (kernel 5.10) V3.0.11 and replace the kernel
$ sudo dd if=boot.img of=/dev/mmcblk1p4
$ sudo reboot
Tinker Board 2/2S Debian 11 (kernel 5.10) V3.0.11 leave it as is, there will be sound from the HDMI-connected display, but replace it with the custom kernel, there will be no sound.
$ speaker-test -D plughw:1,0 -t sine -f 440
How can I output sound from an HDMI-connected display using custom kernel (5.10)?
