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

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Message-ID: <20160608113650.GA3916@pd.tnic>
Date:	Wed, 8 Jun 2016 13:36:50 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Jerome Glisse <jglisse@...hat.com>
Cc:	Christian König <christian.koenig@....com>,
	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.")

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 :)

> 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>

-- 
Regards/Gruss,
    Boris.

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