From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eugeni Dodonov Subject: Re: [PATCH 2/2] drm/i915: Implement w/a for sporadic read failures on waking from rc6 Date: Fri, 15 Jun 2012 15:31:26 -0300 Message-ID: <4FDB7F7E.9050301@linux.intel.com> References: <1339608592-27360-1-git-send-email-chris@chris-wilson.co.uk> <1339608592-27360-2-git-send-email-chris@chris-wilson.co.uk> Reply-To: eugeni.dodonov@intel.com Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by gabe.freedesktop.org (Postfix) with ESMTP id 8827D9E754 for ; Fri, 15 Jun 2012 11:30:10 -0700 (PDT) In-Reply-To: <1339608592-27360-2-git-send-email-chris@chris-wilson.co.uk> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org Errors-To: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org To: Chris Wilson Cc: intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org On 06/13/2012 02:29 PM, Chris Wilson wrote: > As a w/a to prevent reads sporadically returning 0, we need to wait for > the GT thread to return to TC0 before proceeding to read the registers. > > References: https://bugs.freedesktop.org/show_bug.cgi?id=50243 > Signed-off-by: Chris Wilson Reviewed-by: Eugeni Dodonov I think that this patch could solve some of the RC6-related issues which are still out there. So the ones of you affected by random GPU hangs or dropped writes, could you please give this patch a try? Eugeni