From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760011Ab2C3ML6 (ORCPT ); Fri, 30 Mar 2012 08:11:58 -0400 Received: from mail-wg0-f44.google.com ([74.125.82.44]:62813 "EHLO mail-wg0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752107Ab2C3MLx (ORCPT ); Fri, 30 Mar 2012 08:11:53 -0400 Message-ID: <4F75A303.3030409@suse.cz> Date: Fri, 30 Mar 2012 14:11:47 +0200 From: Jiri Slaby User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:13.0) Gecko/20120320 Thunderbird/13.0a2 MIME-Version: 1.0 To: Chris Wilson CC: Jiri Slaby , Keith Packard , dri-devel@lists.freedesktop.org, LKML , daniel@ffwll.ch Subject: Re: i915_driver_irq_handler: irq 42: nobody cared References: <4F717CE3.4040206@suse.cz> <4F717D80.9040207@suse.cz> <4F758400.3080907@suse.cz> <1333104359_155028@CP5-2952> In-Reply-To: <1333104359_155028@CP5-2952> X-Enigmail-Version: 1.4 Content-Type: text/plain; charset=ISO-8859-2 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 03/30/2012 12:45 PM, Chris Wilson wrote: > On Fri, 30 Mar 2012 11:59:28 +0200, Jiri Slaby wrote: >> I don't know what to dump more, because iir is obviously zero too. What >> other sources of interrupts are on the (G33) chip? > > IIR is the master interrupt, with chained secondary interrupt statuses. > If IIR is 0, the interrupt wasn't raised by the GPU. This does not make sense, the handler does something different. Even if IIR is 0, it still takes a look at pipe stats. And this is MSI, so there can be no other source of the interrupt. (Except broken IRQ routing.) I may try to boot with MSIs off if you think it's important. thanks, -- js suse labs