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A linux-arm-msm report for the QLINK modem crash (the error string appears nowhere public), and a Fedora kernel-ark MR plus Bugzilla text for enabling SND_SOC_WSA881X. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_011XgGF5wfxLDAybVnNz6eNQ
101 lines
3.6 KiB
Markdown
101 lines
3.6 KiB
Markdown
# Draft: Fedora request to enable CONFIG_SND_SOC_WSA881X
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Two routes; the merge request is the one that actually changes the
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config, the bug is the paper trail. Doing both is normal: file the bug,
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open the MR, and link them to each other.
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## Route 1: kernel-ark merge request (preferred)
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Repo: <https://gitlab.com/cki-project/kernel-ark>, branch `os-build`.
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The current state, verified 2026-07-28:
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- `redhat/configs/common/generic/CONFIG_SND_SOC_WSA881X` contains
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`# CONFIG_SND_SOC_WSA881X is not set`
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- `redhat/configs/fedora/generic/CONFIG_SND_SOC_WSA883X` contains
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`CONFIG_SND_SOC_WSA883X=m` (the Fedora override pattern to copy)
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The change is one new file:
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```
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echo 'CONFIG_SND_SOC_WSA881X=m' > redhat/configs/fedora/generic/CONFIG_SND_SOC_WSA881X
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```
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Suggested commit message / MR description:
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---
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redhat/configs: fedora: enable SND_SOC_WSA881X
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The WSA881x is the SoundWire speaker amplifier used on Qualcomm
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SDM845/SDM850 machines. The in-tree sdm850-lenovo-yoga-c630.dts
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(shipped and booted by Fedora's aarch64 kernel-core) names two WSA881x
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devices as codec DAIs of its "SLIM Playback" link, so with the driver
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absent the machine driver defers forever with
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platform sound: deferred probe pending: msm-snd-sdm845:
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SLIM Playback: codec dai not found
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and the sound card never registers. Every other link in the chain is
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already enabled (MFD_WCD934X, SND_SOC_WCD934X, GPIO_WCD934X,
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SOUNDWIRE_QCOM, SND_SOC_SDM845, SLIM_QCOM_NGD_CTRL, QCOM_APR,
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QCOM_PD_MAPPER are all =m), as are the newer members of the same
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driver family, SND_SOC_WSA883X and SND_SOC_WSA884X, which the ThinkPad
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X13s uses.
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Verified on a Lenovo Yoga C630 13Q50 (81JL) on 7.1.5-200.fc44.aarch64:
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with snd-soc-wsa881x built out of tree and installed, the
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Lenovo-YOGA-C630-13Q50 card registers, jack detection works, and the
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speaker path plays (UCM profile has been in alsa-ucm-conf since 2020).
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Without it, no sound card has ever registered on this machine on any
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Fedora release.
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---
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## Route 2: Bugzilla
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<https://bugzilla.redhat.com> — Product: Fedora, Component: kernel,
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Version: 44. Severity low, it is a feature enablement.
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Summary:
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aarch64: CONFIG_SND_SOC_WSA881X not set; audio cannot work on
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Lenovo Yoga C630 (SDM850)
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Description:
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---
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Fedora's aarch64 kernel has never enabled CONFIG_SND_SOC_WSA881X, the
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driver for the WSA881x SoundWire speaker amplifier used on Qualcomm
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SDM845/SDM850 hardware. The in-tree device tree
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arch/arm64/boot/dts/qcom/sdm850-lenovo-yoga-c630.dts — which Fedora
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ships in kernel-core and which boots Fedora on this laptop — requires
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two WSA881x DAIs on its "SLIM Playback" link, so the sound card is
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stuck in deferred probe on every Fedora release:
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platform sound: deferred probe pending: msm-snd-sdm845:
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SLIM Playback: codec dai not found
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Everything else in the audio chain is already =m: MFD_WCD934X,
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SND_SOC_WCD934X, GPIO_WCD934X, SOUNDWIRE_QCOM, SND_SOC_SDM845,
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SLIM_QCOM_NGD_CTRL, QCOM_APR, QCOM_PD_MAPPER — and notably the newer
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amplifiers in the same family, SND_SOC_WSA883X=m and
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SND_SOC_WSA884X=m (X13s-era), are enabled.
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Reproducer / verification, on 7.1.5-200.fc44.aarch64 on a Yoga C630
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13Q50 (81JL): building sound/soc/codecs/wsa881x.c out of tree and
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loading it makes the Lenovo-YOGA-C630-13Q50 card register immediately,
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with working jack detection and speaker playback (the UCM profile has
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shipped in alsa-ucm-conf since 2020). No other change is needed.
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Requested change: CONFIG_SND_SOC_WSA881X=m for Fedora, i.e. one file
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in kernel-ark:
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redhat/configs/fedora/generic/CONFIG_SND_SOC_WSA881X containing
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"CONFIG_SND_SOC_WSA881X=m", matching the existing
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fedora/generic/CONFIG_SND_SOC_WSA883X.
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kernel-ark MR: <link once opened>
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---
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