Re: [PATCH 0/3] Add DisplayPort sound support for Fairphone 5 smartphone

[Konrad Dybcio <konradybcio@kernel.org>]

On 9.08.2024 10:33 AM, Luca Weiss wrote:
> Add the necessary sound card bits and some dts additions to enable sound
> over DisplayPort-over-USB-C, e.g. to a connected TV or monitor.
> 
> The UCM files can be found here:
> https://gitlab.com/postmarketOS/pmaports/-/tree/master/device/testing/device-fairphone-fp5/ucm
> 
> Two extra notes:
> 
> 1. I don't quite understand whether the sound driver should have
>    SoC-specific compatible or device-specific compatible. Some earlier
>    patches by another author for a QCM6490 board and a QCS6490 board use
>    device-specific compatible - but from what I can tell this is not how
>    it's generally done for other sound drivers?
> 
> 2. Unfortunately DisplayPort enablement itself for Fairphone 5 is not
>    upstream yet. This is blocked by DSI display bringup upstream which
>    is blocked by DSC 1:1:1 not being supported upstream yet and just
>    working with a hacky patch. Nevertheless, DisplayPort audio was
>    validated working with no additional sound-related changes so once
>    DisplayPort gets enabled, sound should also just work upstream.

You can enable DP and keep DSI disabled for the time being

Konrad