ASoC: Intel: fix YogaBook audio on Linux 7

[lawrencefrias]

Forward-port YogaBook CHT/RT5677 audio machine driver fixes to Linux 7.

Fixes NULL card access in machine-level DAPM event handlers by replacing
snd_soc_dapm_to_component(w->dapm)->card with snd_soc_dapm_to_card(w->dapm).

Also ensures missing speaker/headphone GPIO lookups do not break audio
initialization.

Tested on Lenovo YogaBook YB1-X91F with Linux 7.0.10:

• internal cht-yogabook card registers
• RT5677 codec initializes correctly
• audio playback works
• no RIP/#PF crashes during playback

[DerKnerd]

Isn't the Kernel still on 6.17?

[jekhor]

Actually I prepared a patch series for mainline and it passed first review stage but i still have not submitted second version after review. I found few issues which need to be fixed, for example, sound stops working after module unloading and loading.

First version is here: https://lore.kernel.org/linux-sound/20260217231324.1319392-1-jekhor@gmail.com/#r

[lawrencefrias]

I created a custom kernel for Linux 7. I'm uploading a new release on my forked repo. https://github.com/lawrencefrias/yogabook-linux-kernel/releases/tag/v7.0.10-yogabook7-audio

[DerKnerd]

@lawrencefrias Does your repo contain the sources for the 7 kernel? Cause it is only one commit ahead of the current master here.

[lawrencefrias]

This PR contains only the fix on top of the current yogabook-linux tree.

My full Linux 7 work is based on the upstream linux-stable tree with additional YogaBook patches applied locally.

I will provide the full branch / source tree if needed. I didn’t include it in the PR to keep the changes minimal and focused on the audio fix.

[DerKnerd]

I think it would be cool if you could create a proper PR with the kernel version 7. I think you also violated the GPL with providing binaries without sources.

[lawrencefrias]

I created a separate branch with the Linux 7 YogaBook port work based directly on this repository (without including the full linux-stable history):

lawrencefrias:linux-7-yogabook-port

The PR itself only contains the minimal audio fix to keep it reviewable.

It looks like most of the changes I had locally are already aligned with your current tree, so there are no large diffs on top at the moment. I'll work on the full pr next.

[lawrencefrias]

Ok @DerKnerd I think I did everything correctly. Please view my other pr.

[DerKnerd]

@lawrencefrias Great, I am not knowledgable in Linux kernel dev, so @jekhor would need to take a look into this.