linux-kernel - Re: [PATCH 3.0-rc3, v2] i915: Fix gen6 (SNB) GPU stalling

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Message-ID: <BANLkTimKKcW3yfDBF2ahYag+kKvdMaA7Mw@mail.gmail.com>
Date:	Sat, 18 Jun 2011 02:20:08 +0800
From:	Daniel J Blueman <daniel.blueman@...il.com>
To:	Eric Anholt <eric@...olt.net>
Cc:	Dave Airlie <airlied@...hat.com>,
	Chris Wilson <chris@...is-wilson.co.uk>,
	intel-gfx@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
	Ben Widawsky <ben@...dawsk.net>,
	Kenneth Graunke <kenneth@...tecape.org>,
	Yi Sun <yi.sun@...el.com>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Mengmeng Meng <mengmeng.meng@...el.com>,
	Robert Hooker <sarvatt@...ntu.com>
Subject: Re: [PATCH 3.0-rc3, v2] i915: Fix gen6 (SNB) GPU stalling

On 18 June 2011 01:44, Eric Anholt <eric@...olt.net> wrote:
> On Sat, 18 Jun 2011 00:42:00 +0800, Daniel J Blueman <daniel.blueman@...il.com> wrote:
>> Workaround Sandy Bridge GPU stalls by allowing the blitter command streamer
>> to write interrupt state to the Hardware Status Page when a MI_USER_INTERRUPT
>> command is decoded.
>>
>> v1->v2: Moved to prior interrupt handler installation and RMW flags as per
>> feedback.
>
> We shouldn't be RMWing.  We're the driver, we're supposed to know what
> we want.  I'm backing that bit out, will do another round of testing,
> and send it off.

I still prefer directly setting the mask due to my earlier reasons.
Unmasking in the IRQ preinstall tests good here, so I'll send a v3
patch in the morning.

Thanks,
  Daniel
-- 
Daniel J Blueman
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