[Bug 108714] [CI][BAT] igt at gem_ctx_create@basic-files - incomplete - *ERROR* render: timed out waiting for forcewake ack request.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=108714

--- Comment #11 from Tj <0.freedesktop at iam.tj> ---
It looks like you've picked up on the same thread I've been following. Here's
some comments I left for Jarred earlier (in IRC) which I don't know that he has
seen yet.

08:42 <TJ-> I've been working on the dmesg again and I'm looking to a wider
cause. Communication with the GPU sub-systems is partially done using IIC
(i2c). The root cause seems to start with "[    5.102322] i2c_designware
808622C1:06: controller timed out". 808622C1 is the designware CHERRY_TRAIL and
is supposed to be configured by ACPI DSDT values
09:03 <TJ-> Might be getting closer... there was a patch to fix a very similar
problem in fba4adbbf670 (which I suspect might help here based on the commit
comment) but that got reverted/changed in 06cb616b1bca and this later change
makes a global change but is instigated for a particular platform. I wonder if
the first patch might be more correct on your devices.
09:24 <TJ-> OK, we need to capture what little debug messages the
i2c-designware driver writes via dev_dbg() so add "debug" to the kernel
command-line. This command will show you the messages we can expect to see:
"git grep -A1 dev_dbg drivers/i2c/busses/i2c-designware-*"

-- 
You are receiving this mail because:
You are on the CC list for the bug.
You are the QA Contact for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20181129/0441fab4/attachment.html>