linux-kernel - Re: radeon 0000:02:00.0: GPU lockup CP stall for more than 10000msec

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Message-ID: <CADnq5_OuhJordwCQArknpdvzYLryouZ+u+a+tm37n3K+hmB9uw@mail.gmail.com>
Date:	Wed, 2 Jan 2013 18:37:23 -0500
From:	Alex Deucher <alexdeucher@...il.com>
To:	Markus Trippelsdorf <markus@...ppelsdorf.de>
Cc:	Jerome Glisse <j.glisse@...il.com>, Antti Palosaari <crope@....fi>,
	Borislav Petkov <bp@...en8.de>,
	Shuah Khan <shuahkhan@...il.com>,
	Andy Furniss <andyqos@...sn.org>,
	Alex Deucher <alexander.deucher@....com>,
	dri-devel@...ts.freedesktop.org,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: radeon 0000:02:00.0: GPU lockup CP stall for more than 10000msec

On Wed, Jan 2, 2013 at 5:38 PM, Markus Trippelsdorf
<markus@...ppelsdorf.de> wrote:
> On 2013.01.02 at 17:31 -0500, Jerome Glisse wrote:
>> Please affected people can you test if patch :
>> http://people.freedesktop.org/~glisse/0003-drm-radeon-fix-dma-copy-on-r6xx-r7xx-evergen-ni-si-g.patch
>>
>> Fix the issue, you need to make sure you don't have the patch that
>> disable dma on r6xx ie that line 977-978 & 1061-1062  in radeon_asic.c
>> is :
>>  .copy = &r600_copy_dma,
>>  .copy_ring_index = R600_RING_TYPE_DMA_INDEX,
>
> It fixes the issue for me. Thanks.

The count is actually the count, not count - 1.  The real fix seems to
be that r6xx requires 2 dw aligned transfers.  The attached patch
fixes the issue for me.

Alex

>
> --
> Markus

View attachment "0001-drm-radeon-r6xx-fix-DMA-engine-for-ttm-bo-transfers.patch" of type "text/x-patch" (1111 bytes)