APPLIED[J]: [SRU][i/OEM-5.14/j/unstable][PATCH 0/2] alsa/sdw: fix the audio sdw codec parsing logic in the acpi table

[Andrea Righi]

On Fri, Dec 24, 2021 at 10:26:14AM +0800, Hui Wang wrote:
> BugLink: https://bugs.launchpad.net/bugs/1955686
> 
> This patchset is for soundwire audio, the kernel below impish doesn't
> support sdw audio, so no need to send the patches to hirsute and focal.
> 
> [Impact]
> we have a couple of Dell ADL laptops which have sdw audio, after upgrading
> the BIOS to 0.1.4 or above, the sdw audio can't work anymore, the driver
> can't parse the codec layout from ACPI table anymore.
> 
> 
> [Fix]
> Backport two patches from upstream.
> 
> [Test]
> Boot the patched kernel on those machines both with old bios and
> new bios, all work well, the sdw audio could initialize and the
> audio function work well.
> 
> [Where problems could occur]
> If it could introduce regression, it will be on the acpi sdw codec
> parsing, so some sdw audio machines could fail to find the codec, then
> the whole audio function fails. But this possibility is very low, we
> already tested the patches on both old bios and new bios.

Applied to jammy:linux.

Thanks,
-Andrea