From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 73021CA9EB7 for ; Mon, 21 Oct 2019 11:40:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4A3802084C for ; Mon, 21 Oct 2019 11:40:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728522AbfJULkY (ORCPT ); Mon, 21 Oct 2019 07:40:24 -0400 Received: from mga02.intel.com ([134.134.136.20]:58478 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727685AbfJULkY (ORCPT ); Mon, 21 Oct 2019 07:40:24 -0400 X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 21 Oct 2019 04:40:23 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.67,323,1566889200"; d="scan'208";a="209428465" Received: from lahna.fi.intel.com (HELO lahna) ([10.237.72.157]) by fmsmga001.fm.intel.com with SMTP; 21 Oct 2019 04:40:18 -0700 Received: by lahna (sSMTP sendmail emulation); Mon, 21 Oct 2019 14:40:17 +0300 Date: Mon, 21 Oct 2019 14:40:17 +0300 From: Mika Westerberg To: Karol Herbst Cc: linux-kernel@vger.kernel.org, Bjorn Helgaas , Lyude Paul , "Rafael J . Wysocki" , linux-pci@vger.kernel.org, linux-pm@vger.kernel.org, dri-devel@lists.freedesktop.org, nouveau@lists.freedesktop.org Subject: Re: [PATCH v3] pci: prevent putting nvidia GPUs into lower device states on certain intel bridges Message-ID: <20191021114017.GY2819@lahna.fi.intel.com> References: <20191016144449.24646-1-kherbst@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191016144449.24646-1-kherbst@redhat.com> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo User-Agent: Mutt/1.12.1 (2019-06-15) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Karol, Sorry for commenting late, I just came back from vacation. On Wed, Oct 16, 2019 at 04:44:49PM +0200, Karol Herbst wrote: > Fixes state transitions of Nvidia Pascal GPUs from D3cold into higher device > states. > > v2: convert to pci_dev quirk > put a proper technical explanation of the issue as a in-code comment > v3: disable it only for certain combinations of intel and nvidia hardware > > Signed-off-by: Karol Herbst > Cc: Bjorn Helgaas > Cc: Lyude Paul > Cc: Rafael J. Wysocki > Cc: Mika Westerberg > Cc: linux-pci@vger.kernel.org > Cc: linux-pm@vger.kernel.org > Cc: dri-devel@lists.freedesktop.org > Cc: nouveau@lists.freedesktop.org > --- > drivers/pci/pci.c | 11 ++++++++++ > drivers/pci/quirks.c | 52 ++++++++++++++++++++++++++++++++++++++++++++ I may be missing something but why you can't do this in the nouveau driver itself?