Comment 410 for bug 1958019

Created attachment 298379
little modification to the `linux-max.patch` to fix sound for Legion 7i, S740, Yoga 9i

Beware of a misunderstanding. With patch 0.0.10 alias `linux-5.13-legion-yoga-14ITL5-sound-0.0.10-001.patch - correct patch` only the right speaker was working for me, the left one did not on the `Yoga 7 14ITL5`, which is how my model is called according to the back plate. It also has stickers on it, calling it a `YOGA 7i`.

I restructured the patch code a little and there was this comment `set right speaker Yoga 7i.`, but that was not sitting in the middle of the code block: The code block for the left speaker was shorter, so that I compared line by line what was missing and finally copied the difference from the right speaker to the left. I compiled the kernel with that and tested it on my hardware and it works - on a Yoga 7i that is.

The gist document from @sycxyc gives me a better understanding of what the code does and by the looks of it: `set the speaker` and `activate speaker` for both channels. But there are twopossibilities to `set the speaker` in the document and one is dedicated to the Yoga 7i only. Both possibilities are implemented in the patch in the same code block, so that changes for one model can influence another and I made a mistake, which could be a problem with other models: The attachment 298363, line 8223 should have been `0x1a` instead of `0x2a` to select the correct speaker before activating a speaker.

Attached is a patch called `linux-max-untested.patch` with the little change I mentioned. It should fix problem with other models and it should still work with the Yoga 7i. However it is untested, because I currently have no time to compile the kernel again.

Have fun and good luck.