[Intel-gfx] [PATCH v2] drm/i915: Avoid GPU hang when coming out of S3 or S4

[S, Deepak]

Thanks Chirs for review, We moved  "Init_hw" to initialize WA's before any BB submission. 

Init_hw calls " init_clock_gating"

Thanks
Deepak

-----Original Message-----
From: Chris Wilson [mailto:chris at chris-wilson.co.uk] 
Sent: Tuesday, April 28, 2015 12:53 PM
To: Antoine, Peter
Cc: intel-gfx at lists.freedesktop.org; S, Deepak; Tian, YeX; Weinehall, David
Subject: Re: [Intel-gfx] [PATCH v2] drm/i915: Avoid GPU hang when coming out of S3 or S4

On Tue, Apr 28, 2015 at 08:18:14AM +0100, Peter Antoine wrote:
> This patch fixed a timing issue that causes a GPU hang when a the 
> system comes out of power saving.
> 
> During pm_resume, We are submitting batchbuffers before enabling 
> Interrupts this is causing us to miss the context switch interrupt, 
> and in consequence intel_execlists_handle_ctx_events is not triggered.

Ah. Thanks. How about a code comment? :)

But that doesn't explain moving init_hw...
-Chris

--
Chris Wilson, Intel Open Source Technology Centre