Layerscape中的主题 LX2160A: kernel patch for USB erratum A-010131 missing?

LX2160A: kernel patch for USB erratum A-010131 missing?

daniel_klauer — Thu, 22 Jul 2021 10:22:52 GMT

Hello,

There is a Linux kernel patch which apparently is meant to fix the dwc3 USB erratum A-010131, posted here: https://lkml.org/lkml/2018/1/5/109

And looking at linux-qoriq's LSDK-20.12 tag, it contains a commit which adds the new device tree option "snps,dis-u1u2-when-u3-quirk;" to the lx2160a device tree, see https://source.codeaurora.org/external/qoriq/qoriq-components/linux/commit/?id=16d534b719fe95ef103d544e50fb7fa2aa24a93f.

However, LSDK-20.12 does not seem to contain the above patch, or really any code checking the new device tree option (at least I couldn't find anything). It seems like an oversight, or is it intentional? Or is the erratum already fixed by another patch?

We're seeing some problems on our custom board using LX2160A, which looks like they might be related to this erratum, so it would be useful to know if this patch for it is working and should be included. Thanks!

Re: LX2160A: kernel patch for USB erratum A-010131 missing?

yipingwang — Fri, 23 Jul 2021 04:01:41 GMT

I discussed this issue with LSDK development team.

This patch isn't included in LSDK 20.12 release, because the LSDK development team didn't reproduce this erratum.

If you could reproduce USB erratum A-010131 on your custom board, you could add this patch in the Kernel source code by yourself.

Re: LX2160A: kernel patch for USB erratum A-010131 missing?

daniel_klauer — Fri, 23 Jul 2021 08:32:41 GMT

OK, thanks, we'll try and see whether it helps.