From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chris Wilson Subject: Re: [PATCH] drm/i915: SNB BLT workaround Date: Tue, 02 Nov 2010 10:43:25 +0000 Message-ID: <0d30dc$k25lhq@orsmga001.jf.intel.com> References: <1288686661-12154-1-git-send-email-nanhai.zou@intel.com> <41EFD7A46E18724CAB128DAD0073348018EF55F46B@shsmsx502.ccr.corp.intel.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0266577135==" Return-path: Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by gabe.freedesktop.org (Postfix) with ESMTP id 82DA09E8B6 for ; Tue, 2 Nov 2010 03:43:28 -0700 (PDT) In-Reply-To: <41EFD7A46E18724CAB128DAD0073348018EF55F46B@shsmsx502.ccr.corp.intel.com> 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: "Zou, Nanhai" , "intel-gfx@lists.freedesktop.org" List-Id: intel-gfx@lists.freedesktop.org --===============0266577135== Content-Type: text/plain On Tue, 2 Nov 2010 17:08:09 +0800, "Zou, Nanhai" wrote: > >>-----Original Message----- > >>From: Chris Wilson [mailto:chris@chris-wilson.co.uk] > >>Sent: 2010年11月2日 17:05 > >>To: Zou, Nanhai; intel-gfx@lists.freedesktop.org > >>Cc: Zou, Nanhai > >>Subject: Re: [PATCH] drm/i915: SNB BLT workaround > >> > >>On Tue, 2 Nov 2010 16:31:01 +0800, Zou Nan hai wrote: > >>> on some stepping of SNB cpu, the first command to be parsed in BLT > >>> command streamer should be MI_BATCHBUFFER_START > >>> otherwise the GPU may hang. > >> > >>Then just add the workaround to the init routine. > >>-Chris > >> > > The first command here means each BLT command streamer > begin the parse action, when the ring tail is moving ahead. Okay, that makes more sense. :) I added some error checking, then realised that no error checking was done in 2.6.36 and swore. Applied to -next and -fixes, with a tag for stable since I presume that some of these chips were sent to vendors for validation. -Chris -- Chris Wilson, Intel Open Source Technology Centre --===============0266577135== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx --===============0266577135==--