[Bug 104959] GPU HANG: ecode 9:-1:0x00000000, reason: Kicking stuck wait on bcs0

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104959

--- Comment #3 from Thiago Macieira <thiago at kde.org> ---
(In reply to Imre Deak from comment #2)
> > DMC: 1.26
> 
> so could you try version 1.27 where that's fixed?

I asked Anusha and the reply I got is that 1.27 is loaded only by the kernel
that has been tested with 1.27. The file is sitting there in /lib/firmware, but
doesn't get loaded by the kernel.

I'm told that won't happen until kernel 4.16.

Also please note that 4.14 and earlier have been using 1.26 without this
particular problem. I'm reporting it in case it's a new regression.

> https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/
> plain/i915/skl_dmc_ver1_27.bin

$ ls -l /lib/firmware/i915/skl_dmc_ver1*
-rw-r--r-- 1 root root 8824 jan  4 07:06 /lib/firmware/i915/skl_dmc_ver1_23.bin
-rw-r--r-- 1 root root 8928 jan  4 07:06 /lib/firmware/i915/skl_dmc_ver1_26.bin
-rw-r--r-- 1 root root 8928 jan  4 07:06 /lib/firmware/i915/skl_dmc_ver1_27.bin
lrwxrwxrwx 1 root root   19 jan  4 07:06 /lib/firmware/i915/skl_dmc_ver1.bin ->
skl_dmc_ver1_26.bin


> and
> 
> commit 39ccc9852e2b46964c9c44eba52db57413ba6d27
> Author: Anusha Srivatsa <anusha.srivatsa at intel.com>
> Date:   Thu Nov 9 17:18:32 2017 -0800
> 
>     drm/i915/skl: DMC firmware for skylake v1.27
> 
> 
> Yes, we need to start backporting these:/

That would be appreciated. I can't build my own kernels (secure boot).

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