linux-kernel - Re: 274ad65c9d02 ("drm/radeon: hard reset r600 and newer GPU when hibernating.")

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Message-ID: <57580684.9060106@amd.com>
Date:	Wed, 8 Jun 2016 13:50:28 +0200
From:	Christian König <christian.koenig@....com>
To:	Borislav Petkov <bp@...en8.de>, Jerome Glisse <jglisse@...hat.com>
CC:	Alex Deucher <alexander.deucher@....com>,
	<dri-devel@...ts.freedesktop.org>,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: 274ad65c9d02 ("drm/radeon: hard reset r600 and newer GPU when
 hibernating.")

Am 08.06.2016 um 13:36 schrieb Borislav Petkov:
> On Tue, Jun 07, 2016 at 05:51:52PM -0400, Jerome Glisse wrote:
>> Ok i don't have too much time to dig into r600 i assume that r700 breaks
>> the same way so could you verify that attached patch fix the issue for
>> you. Note that video decoding is likely broken for you after hibernation
>> but you might have never notice it.
> Probably. And that means I really haven't noticed.
>
> How do I test video decoding? mplayer seems to work fine :)

What's the output of mplayer? Mplayer usually uses video acceleration 
when it is available.

Regards,
Christian.

>
>>  From 8ed42906e430880ce01bc6f175f1c7c180529353 Mon Sep 17 00:00:00 2001
>> From: =?UTF-8?q?J=C3=A9r=C3=B4me=20Glisse?= <jglisse@...hat.com>
>> Date: Tue, 7 Jun 2016 17:43:04 -0400
>> Subject: [PATCH] drm/radeon: do not hard reset GPU while freezing on r600/r700
>>   family
>> MIME-Version: 1.0
>> Content-Type: text/plain; charset=UTF-8
>> Content-Transfer-Encoding: 8bit
>>
>> Seems r600/r700 does not like hard reset while freezing for hibernation
>> (regression due to 274ad65c9d02bdcbee9bae045517864c3521d530 which itself
>> is a fix for hibernation on some GPU families). Until i can debug further
>> issue with r600, let just disable this for r600/r700 as they are very
>> similar family and bug affecting one likely affect the other.
>>
>> Signed-off-by: Jérôme Glisse <jglisse@...hat.com>
> Reported-and-tested-by: Borislav Petkov <bp@...e.de>
>