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

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Message-ID: <CA+gsUGRBHb2Yg6u_GiXdD47e4RSGmBei2sBjQih_Tr09HxQFPg@mail.gmail.com>
Date:	Thu, 28 Feb 2013 14:33:18 -0300
From:	Paulo Zanoni <przanoni@...il.com>
To:	sedat.dilek@...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

Hi

2013/2/28 Sedat Dilek <sedat.dilek@...il.com>:
> On Thu, Feb 28, 2013 at 6:12 PM, Sedat Dilek <sedat.dilek@...il.com> wrote:
>> 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
>>
>
> Installed intel-gpu-tools.
>
> # intel_reg_read
> Usage: intel_reg_read [-f | addr]
>          -f : read back full range of registers.
>               WARNING! This could be danger to hang the machine!
>          addr : in 0xXXXX format
>
> # intel_reg_read 0x44008
> Couldn't map MMIO region: Resource temporarily unavailable
>
> [  368.281707] intel_reg_read:3657 conflicting memory types
> f0000000-f0400000 uncached-minus<->write-combining
> [  381.521912] intel_reg_read:3658 conflicting memory types
> f0000000-f0400000 uncached-minus<->write-combining
> [  401.136291] intel_reg_read:3659 conflicting memory types
> f0000000-f0400000 uncached-minus<->write-combining
>
> Wrong i-g-t version? Missing enabled kernel-config option? Boot with
> i915 debug enabled?

Just build the version from git and it should work
(http://cgit.freedesktop.org/xorg/app/intel-gpu-tools/).

>
> - Sedat -
>
>>> 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

-- 
Paulo Zanoni
--
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