Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754385Ab3IJFPw (ORCPT ); Tue, 10 Sep 2013 01:15:52 -0400 Received: from mga01.intel.com ([192.55.52.88]:11128 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754217Ab3IJFPt (ORCPT ); Tue, 10 Sep 2013 01:15:49 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.90,876,1371106800"; d="scan'208";a="399124592" Message-ID: <522EAB25.6000901@intel.com> Date: Tue, 10 Sep 2013 13:16:21 +0800 From: Aaron Lu User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130805 Thunderbird/17.0.8 MIME-Version: 1.0 To: Igor Gnatenko CC: ACPI Devel Mailing List , "Rafael J. Wysocki" , Matthew Garrett , Seth Forshee , "Lee, Chun-Yi" , Daniel Vetter , "intel-gfx@lists.freedesktop.org" , "dri-devel@lists.freedesktop.org" , "linux-kernel@vger.kernel.org" , Len Brown , Yves-Alexis Perez , Felipe Contreras , Lee Chun-Yi , Henrique de Moraes Holschuh Subject: Re: [PATCH 2/2] ACPI / video / i915: Remove ACPI backlight if firmware expects Windows 8 References: <522D88C3.7000808@intel.com> <522D89EC.6050103@intel.com> <1378727093.13401.3.camel@ThinkPad-X230.localdomain> <522E91A6.6040600@intel.com> <1378790011.2204.3.camel@ThinkPad-X230.localdomain> In-Reply-To: <1378790011.2204.3.camel@ThinkPad-X230.localdomain> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2889 Lines: 78 On 09/10/2013 01:13 PM, Igor Gnatenko wrote: > On Tue, 2013-09-10 at 11:27 +0800, Aaron Lu wrote: >> On 09/09/2013 07:44 PM, Igor Gnatenko wrote: >>> On Mon, 2013-09-09 at 16:42 +0800, Aaron Lu wrote: >>>> diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c >>>> index f466980..75fba17 100644 >>>> --- a/drivers/gpu/drm/i915/i915_dma.c >>>> +++ b/drivers/gpu/drm/i915/i915_dma.c >>>> @@ -1650,7 +1650,7 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags) >>>> if (INTEL_INFO(dev)->num_pipes) { >>>> /* Must be done after probing outputs */ >>>> intel_opregion_init(dev); >>>> - acpi_video_register(); >>>> + __acpi_video_register(i915_take_over_backlight); >>>> } >>>> >>>> if (IS_GEN5(dev)) >>> >>> I can't compile: >>> >>> >>> DEBUG: drivers/gpu/drm/i915/i915_dma.c: In function 'i915_driver_load': >>> DEBUG: drivers/gpu/drm/i915/i915_dma.c:1661:3: error: implicit >>> declaration of function >>> '__acpi_video_register' [-Werror=implicit-function-declaration] >>> DEBUG: __acpi_video_register(i915_take_over_backlight); >>> DEBUG: ^ >>> DEBUG: cc1: some warnings being treated as errors >>> DEBUG: make[4]: *** [drivers/gpu/drm/i915/i915_dma.o] Error 1 >>> DEBUG: make[3]: *** [drivers/gpu/drm/i915] Error 2 >>> DEBUG: make[2]: *** [drivers/gpu/drm] Error 2 >>> DEBUG: make[1]: *** [drivers/gpu] Error 2 >>> DEBUG: make: *** [drivers] Error 2 >>> >> >> The two patches are based on top of Rafael's linux-next tree. I just >> tried it again, no compile problem for me. I also tried on today Linus' >> master tree, as there are some updates from i915, two conflicts exist. >> I've just resolved them and will update it in next revision. >> If you want to try it now, please use: >> https://github.com/aaronlu/linux acpi_video_rework >> >> Thanks, >> Aaron > > Thanks. this patch fixes my problems w/ compilation. I've tested this > two patches and after apply I have: > $ tree /sys/class/backlight/ > /sys/class/backlight/ > |-- acpi_video0 > -> ../../devices/pci0000:00/0000:00:02.0/backlight/acpi_video0 > `-- intel_backlight > -> ../../devices/pci0000:00/0000:00:02.0/drm/card0/card0-LVDS-1/intel_backlight > > 2 directories, 0 files > > I think it's didn't unregistered.. I may forget. I need to apply one of > patch from Matthew ? You need to specify i915.take_over_backlight=1 in kernel cmdline, that module option is set to false by default for now. Thanks for the test. -Aaron > > Some strings from logs: > DMI: LENOVO 23205NG/23205NG, BIOS G2ET92WW (2.52 ) 02/22/2013 > thinkpad_acpi: Standard ACPI backlight interface available, not loading > native one > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/