linux-kernel - Re: [Intel-gfx] [git pull] drm merge for 3.9-rc1

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Message-ID: <CA+icZUWE-DpD3azUaY7uKnz18DV-JRdYBkTBa-YzqX30S4THrQ@mail.gmail.com>
Date:	Thu, 28 Feb 2013 18:12:21 +0100
From:	Sedat Dilek <sedat.dilek@...il.com>
To:	Paulo Zanoni <przanoni@...il.com>
Cc:	Chris Wilson <chris@...is-wilson.co.uk>,
	Dave Airlie <airlied@...il.com>,
	DRI <dri-devel@...ts.freedesktop.org>,
	intel-gfx <intel-gfx@...ts.freedesktop.org>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-next <linux-next@...r.kernel.org>
Subject: Re: [Intel-gfx] [git pull] drm merge for 3.9-rc1

On Thu, Feb 28, 2013 at 3:31 PM, Paulo Zanoni <przanoni@...il.com> wrote:
> Hi
>
> 2013/2/28 Chris Wilson <chris@...is-wilson.co.uk>:
>> On Thu, Feb 28, 2013 at 12:06:28AM +0100, Sedat Dilek wrote:
>>> On Wed, Feb 27, 2013 at 11:36 PM, Sedat Dilek <sedat.dilek@...il.com> wrote:
>>> > Hi,
>>> >
>>> > I am seeing this also on Linux-Next.
>>> >
>>> > /var/log/kern.log:Feb 27 22:52:35 fambox kernel: [   28.202381]
>>> > [drm:intel_dp_aux_wait_done] *ERROR* dp aux hw did not signal timeout
>>> > (has irq: 1)!
>>> > /var/log/kern.log:Feb 27 22:52:35 fambox kernel: [   28.210588]
>>> > [drm:intel_dp_aux_wait_done] *ERROR* dp aux hw did not signal timeout
>>> > (has irq: 1)!
>>> >
>>> > /var/log/kern.log.1:Feb 22 07:36:04 fambox kernel: [   27.408280]
>>> > [drm:intel_dp_aux_wait_done] *ERROR* dp aux hw did not signal timeout
>>> > (has irq: 1)!
>>> >
>>> > This seems to be hard reproducible...
>>> > Laptop-LCD... Sandybridge Mobile-GT2.
>>> >
>>> > Is there a way to force the error?
>>> >
>>> > Possible patch see [1].
>>> >
>>> > - Sedat -
>>> >
>>> > [1] https://patchwork.kernel.org/patch/2192721/
>>
>> That was:
>>
>> +       if (!done) {
>> +               status = I915_READ_NOTRACE(ch_ctl);
>> +               DRM_ERROR("dp aux hw did not signal timeout (has irq:
>> %i), status=%08x!\n",
>> +                         has_aux_irq, status);
>> +       }
>>
>> You applied
>>
>> +       if (!done) {
>> +               status = I915_READ_NOTRACE(ch_ctl);
>> +               DRM_ERROR("dp aux hw did not signal timeout (has irq:
>> %i), status=%08x!\n",
>> +                         has_aux_irq, status);
>> +       {
>
> In addition to this, after the problem happens can you please dump the
> registers 0x44008 (DEIIR) and 0xC4008 (SDEIIR)? You can do this either
> by running intel-reg-read (from intel-gpu-tools) or by changing the
> DRM_ERROR above to also print the result of I915_READ(0x44008) and
> I915_READ(0xC4008).
>

Do I need a specific version of intel-gpu-tools?
Ubuntu/precise has v1.2 in its archives - sufficient?
Note: The error was twice after dozenz of Linux-Next kernel builds.

- Sedat -

[1] http://packages.ubuntu.com/precise/intel-gpu-tools

> If you conclude that the value of 0x44008 is 0x0 while the value of
> 0xC4008 is not, then this patch should help:
> https://patchwork.kernel.org/patch/2177841/
>
>>
>> That second '{' is the source of the compile error.
>> -Chris
>>
>> --
>> Chris Wilson, Intel Open Source Technology Centre
>> _______________________________________________
>> Intel-gfx mailing list
>> Intel-gfx@...ts.freedesktop.org
>> http://lists.freedesktop.org/mailman/listinfo/intel-gfx
>
>
>
> --
> Paulo Zanoni
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