On Tue, 2021-10-26 at 14:29, Brian Norris wrote:

On Tue, Oct 26, 2021 at 2:20 PM Milan P. Stanić [off-list ref] wrote:

quoted

On Tue, 2021-10-26 at 13:55, Brian Norris wrote:

quoted

On Fri, Oct 22, 2021 at 4:20 AM Milan P. Stanić [off-list ref] wrote:

quoted

On my chromebook samsung peach pi (exynos-5800) wifi driver stops to
work at random time, sometimes after few hours and sometimes after day
or two.

I don't have official recommendations, nor HW to test at the moment,
but for the record, Peach Pi should have Marvell SD 8797. You can see
what firmware Chrome OS used to ship for those devices here:

https://chromium.googlesource.com/chromiumos/third_party/marvell/+/HEAD/sd8797_uapsta.bin
https://chromium.googlesource.com/chromiumos/third_party/marvell/+log/HEAD/sd8797_uapsta.bin

On these urls I can't find actual file to download, or I'm blind (or
don't understand how this site 'works').
Whatever I click I get new url and not binary file to download.

Ack, I forgot Gitiles is not super friendly for downloading binaries directly:

https://github.com/google/gitiles/issues/106

quoted

Could you give url for binary file that I could download, please?

This should do it:

curl https://chromium.googlesource.com/chromiumos/third_party/marvell/+/HEAD/sd8797_uapsta.bin?format=TEXT
| base64 -d > sd8797_uapsta.bin

This works, thanks.

With this firmware it crashed after 8 hours, and I rebooted machine to
see how long it will work on second try.

Or some similar invocation if you have to use the browser (click on
the "txt" link, then base64-decode the result).

quoted

quoted

quoted

kernel is mainline 5.14.4 without patches, but I recall that I noticed
this crashes on older ones but can't remember exact version.

Did it ever work well? I'm curious if this was a kernel regression, or
perhaps just a long-standing firmware issue.

Yes, it worked for few years but started to crash about few months ago
and that happened when I upgraded complete root filesystem, so it could
be related to upgraded firmware. Thank you for hint what to try to test.

Could be. It does look like mainline linux-firmware got an update for
this file in 2019, so it's possible your distro (or whatever provides
your rootfs) only semi-recently got the update.

I use linux-firmware-mrvl-20210919 release but this also happened with
some earlier versions released this year.

I use Alpine linux (https://alpinelinux.org/, I'm alpine linux developer
and maintainer of latest stable kernels on it).

In meantime I found that Arch linux for ARM (alarm) have older firmware
for peach chromebook here (probably copied from chromeos):
https://archlinuxarm.org/builder/src/sd8787_uapsta_cros.bin
https://archlinuxarm.org/builder/src/sd8797_uapsta_cros.bin
https://archlinuxarm.org/builder/src/sd8897_uapsta_cros.bin

They even have patched kernel for this here:
https://archlinuxarm.org/packages/armv7h/linux-peach/files/0002-use-chromiumos-mwifiex-drivers.patch
but this is for old 3.8.11 kernel.

I will try with them and see how it would work.
Also I will try to find if I have old root FS which worked few years on
it (if I have it archived somewhere).

Also, I will report back results.

Kind regards
 

Brian