Re: NULL ptr dereference in cs42l43/cs35l56 on Lenovo Yoga 7 Slim laptop

[Charles Keepax <ckeepax@opensource.cirrus.com>]

On Thu, Nov 12, 2026 at 02:20:31PM +0100, Krzysztof Hałasa wrote:
> Charles Keepax <ckeepax@opensource.cirrus.com> writes:
> sof_sdw sof_sdw: Loaded FW: intel/sof-ipc4-tplg/sof-sdca-1amp-id2.tplg, sha256: b92f8736b0b3557c4030a3a82cd31d47a244589fa3b91ad8b3d4c469ebba27a7
> sof_sdw sof_sdw: Loaded FW: intel/sof-ipc4-tplg/sof-lnl-dmic-4ch-id3.tplg, sha256: 79bd0bb781e8e30d5594a10d7c37825fc4356b2ac63d5d444c2e485b23ccf8f5
> sof_sdw sof_sdw: Loaded FW: intel/sof-ipc4-tplg/sof-hdmi-pcm5-id5.tplg, sha256: fe798c5e0e927b7bb68349a21b50114b1832254a6f851c2e71a398710970273a
> sof_sdw sof_sdw: Failed to open topology file: intel/sof-ipc4-tplg/sof-lnl-ssp2-bt-id8.tplg, you might need to
> sof_sdw sof_sdw: download it from https://github.com/thesofproject/sof-bin/
> 
> Perhaps this? What could that mean?
> ASoC: Parent card not yet available, widget card binding deferred

I suspect it is failing because of that topology file that
failed. Such a file doesn't appear to exist in the sof repo that
I can see. I think the best next step here would be to get Intel
involved, probably the best would be to open a ticket on the sof
GitHub:

https://github.com/thesofproject/sof/issues

If you could CC myself on that as well. If possible it would
still be worth trying 7.3 as well. In theory this laptop was
confirmed as working which does suggest there is perhaps a second
regression going on here:

https://github.com/thesofproject/linux/issues/5948

Thanks,
Charles