HDMI-TX hardware is output-only but the driver incorrectly advertises
capture capability. This causes PulseAudio to attempt opening capture
streams, which triggers busy flag conflicts with playback streams,
resulting in mono audio output.
Solution: Disable capture support by setting channels_min/max to 0
for both I2S and SPDIF DAIs when used with HDMI-TX.
Note: Mainline kernel has the same issue. An official fix is planned
with the new HDMI Codec Framework being developed by Linaro (2025).
Fixes mono audio on: RK3576 NanoPi R76S, NanoPi M5
Tested-on: NanoPi R76S
Split the monolithic DSI0/DSI1 configuration from rk3588s-yyt-lcd.dtsi
into two independent device tree overlays. This allows users to enable
either display without recompiling with different preprocessor defines.
Changes:
- Add youyeetoo-r1-display-dsi0.dts overlay with DSI0 panel, backlight
(PWM12), touchscreen (i2c3), and VP2 video pipeline configuration
- Add youyeetoo-r1-display-dsi1.dts overlay with DSI1 panel, backlight1
(PWM11), touchscreen (i2c5), and VP3 video pipeline configuration
- Remove rk3588s-yyt-lcd.dtsi and its inclusion from main dts
- Remove backlight/backlight1 and PWM11/PWM12 definitions from main dts
as they are now integrated in respective overlays
- Update overlay/Makefile to build new overlay dtbo files
The action used to compile the arm64 kernel then clean the output folder then build the armhf kernel only which later gets uploaded since it is the only output.
Now it builds both variants and uploads the output of both.
