ucm2: sof-rt5682: add support for SOF rt5682 Chromebooks
GitHub pull_request - opened <[email protected]>
| Newsgroups | gmane.linux.alsa.devel |
|---|---|
| Message-ID | <[email protected]> |
alsa-project/alsa-ucm-conf pull request #832 was opened from samson1357924: ## Summary Add UCM configuration for the `sof-rt5682` sound card used on ChromeOS devices (Dratini/hatch family and others). The configuration includes: - `ucm2/conf.d/sof-rt5682/` - card UCM with HiFi profile, rt5682 headset/init sequences - `ucm2/platforms/intel-sof/` - platform detection (DMI-based, glk/cml/tgl/jsl/adl/mtl) and codec probing helpers - `ucm2/codecs/` - speaker amp and headset codec support files (max98357a, max98360a, max98373, max98390, rt1011, rt1015, rt1015p, rt1019p, rt5682s) - `ucm2/codecs/hda/hdmi234.conf` - HDMI device helpers (reuses the existing `hdmi.conf` macro) ## Why ChromeOS Chromebooks using the SOF driver with the `sof-rt5682` machine driver currently have **no audio** on Linux distributions without a UCM configuration: ACP/PipeWire cannot build a usable profile (only the "off" profile is available) and the system ends up with a Dummy Output. This affects at minimum the HP Pro C640 (Dratini), the Acer Chromebook Spin 513 (Dalboz) and several other hatch-family devices. This was previously reported at https://github.com/WeirdTreeThing/chromebook-linux-audio/issues/265 (dummy output on LTS userspace) and discussed in PipeWire MR !2946. ## Testing Verified on an **HP Pro C640 Chromebook** (Dratini, `Google_Hatch`, Intel Comet Lake) running Ubuntu 26.04 LTS: - alsa-lib 1.2.15.3 (UCM syntax 7) - kernel 7.0.0-29-generic (Ubuntu official), SOF firmware 2:2:0-57864 - pipewire 1.6.2 / wireplumber 0.5.13 Result: HiFi profile available and active, internal speakers (PCM 5), headphone jack (PCM 0, auto-switch works), DMIC capture and HDMI 1/2/3 all working. No Dummy Output, no WirePlumber errors. All files are byte-identical to the standalone branch of WeirdTreeThing/alsa-ucm-conf-cros (verified via md5). The UCM validator CI should cover the syntax; no alsa-info hardware emulation was added since the current `ucm-validator2` used by CI performs static verification. Request URL : https://github.com/alsa-project/alsa-ucm-conf/pull/832 Patch URL : https://github.com/alsa-project/alsa-ucm-conf/pull/832.patch Repository URL: https://github.com/alsa-project/alsa-ucm-conf