From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jani Nikula Subject: Re: [BISECTED REGRESSION in 3.19-rc1] [drm/i915] WARNING: drivers/gpu/drm/drm_irq.c:1077 drm_wait_one_vblank Date: Mon, 23 Feb 2015 14:45:26 +0200 Message-ID: <87egpgre3d.fsf@intel.com> References: <20150131211609.GA3710@yulia-desktop> <1423053134.30076.12.camel@tiscali.nl> <20150204172645.GA2623@crion86> <1424092249.7482.10.camel@tiscali.nl> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <1424092249.7482.10.camel@tiscali.nl> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: Paul Bolle , Andrey Skvortsov Cc: intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Daniel Vetter List-Id: dri-devel@lists.freedesktop.org T24gTW9uLCAxNiBGZWIgMjAxNSwgUGF1bCBCb2xsZSA8cGVib2xsZUB0aXNjYWxpLm5sPiB3cm90 ZToKPiBJIHN0aWxsIHNlZSB0aGlzIG9uIHYzLjE5LiBJIGJvb3RlZCB3aXRoIGRybS5kZWJ1Zz0w eDQuIFRoZSBhbG1vc3QgMksKPiBsaW5lcyBpbiBkbWVzZyBjb250YWluaW5nIGVpdGhlciAiW2Ry bSIgb3IgdGhpcyBXQVJOSU5HIGFyZSBwYXN0ZWQKPiBiZWxvdy4gSSByZWFsbHkga25vdyBub3Ro aW5nIGFib3V0IGFsbCB0aGlzLCBidXQgSSBkbyBub3RlIHRoYXQgb25seSB0aGUKPiBXQVJOSU5H UyBhcmUgcHJlY2VkZWQgYnk6Cj4gICAgIFtkcm06aW50ZWxfY2FsY3VsYXRlX3dtXSBGSUZPIHdh dGVybWFyayBsZXZlbDogLTUKPiAgICAgW2RybTppOXh4X3VwZGF0ZV93bV0gRklGTyB3YXRlcm1h cmtzIC0gQTogMjYsIEI6IDgKPgo+IEJ1dCBwZXJoYXBzIHRoYXQncyBhbm90aGVyIHN5bXB0b20g b2YgdGhlIHNhbWUgaXNzdWUuIEEgYml0IG9mIHN0YXJpbmcKPiBhdCB0aGUgY29kZSBjb3VsZG4n dCBoZWxwIG1lIGRldGVybWluZSB0aGF0Lgo+Cj4gUGVyaGFwcyB0aGVzZSBkZWJ1ZyBtZXNzYWdl cyBoZWxwIHNvbWVvbmUgaW4gZGlzY292ZXJpbmcgd2hhdCBtaWdodCBiZQo+IGdvaW5nIG9uIGhl cmUuCgpQbGVhc2UgdHJ5IHY0LjAtcmMxIG9yIHRyeSBjaGVycnktcGlja2luZyB0aGlzIG9uIHRv cCBvZiB2My4xOSBhbmQKcmVwb3J0IGJhY2s6Cgpjb21taXQgZjliNjFmZjZiY2U5YTQ0NTU1MzI0 YjI5ZTU5M2ZkZmZjOWExMTViYwpBdXRob3I6IERhbmllbCBWZXR0ZXIgPGRhbmllbC52ZXR0ZXJA ZmZ3bGwuY2g+CkRhdGU6ICAgV2VkIEphbiA3IDEzOjU0OjM5IDIwMTUgKzAxMDAKCiAgICBkcm0v aTkxNTogUHVzaCB2YmxhbmsgZW5hYmxlL2Rpc2FibGUgcGFzdCBlbmNvZGVyLT5lbmFibGUvZGlz YWJsZQoKQlIsCkphbmkuCgoKCi0tIApKYW5pIE5pa3VsYSwgSW50ZWwgT3BlbiBTb3VyY2UgVGVj aG5vbG9neSBDZW50ZXIKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX18KZHJpLWRldmVsIG1haWxpbmcgbGlzdApkcmktZGV2ZWxAbGlzdHMuZnJlZWRlc2t0b3Au b3JnCmh0dHA6Ly9saXN0cy5mcmVlZGVza3RvcC5vcmcvbWFpbG1hbi9saXN0aW5mby9kcmktZGV2 ZWwK From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752564AbbBWMon (ORCPT ); Mon, 23 Feb 2015 07:44:43 -0500 Received: from mga02.intel.com ([134.134.136.20]:43769 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752136AbbBWMom (ORCPT ); Mon, 23 Feb 2015 07:44:42 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.09,630,1418112000"; d="scan'208";a="681968814" From: Jani Nikula To: Paul Bolle , Andrey Skvortsov Cc: Daniel Vetter , David Airlie , intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Ville =?utf-8?B?U3lyasOkbMOk?= , Matt Roper Subject: Re: [BISECTED REGRESSION in 3.19-rc1] [drm/i915] WARNING: drivers/gpu/drm/drm_irq.c:1077 drm_wait_one_vblank In-Reply-To: <1424092249.7482.10.camel@tiscali.nl> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo References: <20150131211609.GA3710@yulia-desktop> <1423053134.30076.12.camel@tiscali.nl> <20150204172645.GA2623@crion86> <1424092249.7482.10.camel@tiscali.nl> User-Agent: Notmuch/0.19+54~g59142f6 (http://notmuchmail.org) Emacs/24.4.1 (x86_64-pc-linux-gnu) Date: Mon, 23 Feb 2015 14:45:26 +0200 Message-ID: <87egpgre3d.fsf@intel.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 16 Feb 2015, Paul Bolle wrote: > I still see this on v3.19. I booted with drm.debug=0x4. The almost 2K > lines in dmesg containing either "[drm" or this WARNING are pasted > below. I really know nothing about all this, but I do note that only the > WARNINGS are preceded by: > [drm:intel_calculate_wm] FIFO watermark level: -5 > [drm:i9xx_update_wm] FIFO watermarks - A: 26, B: 8 > > But perhaps that's another symptom of the same issue. A bit of staring > at the code couldn't help me determine that. > > Perhaps these debug messages help someone in discovering what might be > going on here. Please try v4.0-rc1 or try cherry-picking this on top of v3.19 and report back: commit f9b61ff6bce9a44555324b29e593fdffc9a115bc Author: Daniel Vetter Date: Wed Jan 7 13:54:39 2015 +0100 drm/i915: Push vblank enable/disable past encoder->enable/disable BR, Jani. -- Jani Nikula, Intel Open Source Technology Center