Re: [RESEND] ALSA: hda/tas2781: TP3407SA evidence for the January custom calibration address patch

[Antheas Kapenekakis]

On Mon, 5 Oct 2026 at 20:04, <linux-kernel.supreme403@xxxxxxxxxx> wrote:
>
> Hi Antheas and sound/TI maintainers,
>
> Resending as plain text because LKML rejected the previous message for containing an HTML part.
> ...
> Limits: only the primary amplifier was read on hardware, and the final register snapshot was taken idle. The listening result is subjective; there is no calibrated SPL measurement or controlled same-volume A/B. Current mainline and for-next were not built and booted as full kernels.
>
> Unlike the January Ally X test, this machine's OEM and firmware layouts differ. This report does not claim to fix the Ally X's separate symptom. Commit 4fe238513407 introduced the custom-node parser with the BASIC-only assignment and appears to be the appropriate Fixes target.
>
> DSP SHA256:
>   a29f522c22cdb203eb1af84846838b5ef76c3a2c721760c7a898dd35f9ce1430
> Public firmware:
> https://gitlab.com/kernel-firmware/linux-firmware/-/raw/20260410/ti/audio/tas2781/TAS2XXX10A40.bin
> Original patch:
> https://lore.kernel.org/all/20260107093134.583873-1-lkml@xxxxxxxxxxx/
>
> OpenAI Codex (LLM) assisted with diagnosing the quiet speakers, validating the existing patch, preparing a local reproducer and drafting this hardware report. The kernel change is your January proposal.

The Ally X had a different issue so we never merged that fix. The
commit body would need to be amended but we should be able to merge
this.

Does anyone else have any suggestions? If not I can plan to resend the
fix in a few days. I will not be able to do the testing for it (no
affected devices)

Antheas

> Assisted-by: LLM
>
> Thanks,
> assembledev
>
>