Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754508Ab3JHGjd (ORCPT ); Tue, 8 Oct 2013 02:39:33 -0400 Received: from mga02.intel.com ([134.134.136.20]:12850 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754382Ab3JHGja (ORCPT ); Tue, 8 Oct 2013 02:39:30 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.90,1055,1371106800"; d="scan'208";a="415564762" From: Aaron Lu To: linux-acpi@vger.kernel.org, intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Cc: Daniel Vetter , "Rafael J. Wysocki" , Matthew Garrett , Seth Forshee , Lee Chun-Yi , Richard Purdie , Igor Gnatenko , Yves-Alexis Perez , Felipe Contreras , Jani Nikula , Aaron Lu , Ben Jencks , Steven Newbury , James Hogan , Kamal Mostafa , Joerg Platte , Kalle Valo , Martin Steigerwald , =?UTF-8?q?J=C3=B6rg=20Otte?= , Mike Galbraith , platform-driver-x86@vger.kernel.org, Mika Westerberg , Henrique de Moraes Holschuh Subject: [PATCH v4 0/4] Fix Win8 backlight issue Date: Tue, 8 Oct 2013 14:39:57 +0800 Message-Id: <1381214401-24672-1-git-send-email-aaron.lu@intel.com> X-Mailer: git-send-email 1.8.4.12.g2ea3df6 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2311 Lines: 54 v4: Remove decleration and stub for acpi_video_unregister_backlight in video.h of patch 2/4 since that function doesn't exist anymore in v3. v3: 1 Add a new patch 4/4 to fix some problems in thinkpad-acpi module; 2 Remove unnecessary function acpi_video_unregister_backlight introduced in patch 2/4 as pointed out by Jani Nikula. v2: v1 has the subject of "Rework ACPI video driver" and is posted here: http://lkml.org/lkml/2013/9/9/74 Since the objective is really to fix Win8 backlight issues, I changed the subject in this version, sorry about that. This patchset has four patches, the first introduced a new API named backlight_device_registered in backlight layer that can be used for backlight interface provider module to check if a specific type backlight interface has been registered, see changelog for patch 1/4 for details. Then patch 2/4 does the cleanup to sepeate the backlight control and event delivery functionality in the ACPI video module and patch 3/4 solves some Win8 backlight control problems by avoiding register ACPI video's backlight interface if: 1 Kernel cmdline option acpi_backlight=video is not given; 2 This is a Win8 system; 3 Native backlight control interface exists. Patch 4/4 fixes some problems in thinkpad-acpi module. Technically, patch 2/4 is not required to fix the issue here. So if you think it is not necessary, I can remove it from the series. Aaron Lu (4): backlight: introduce backlight_device_registered ACPI / video: seperate backlight control and event interface ACPI / video: Do not register backlight if win8 and native interface exists thinkpad-acpi: fix handle locate for video and query of _BCL drivers/acpi/internal.h | 5 +- drivers/acpi/video.c | 442 ++++++++++++++++++++--------------- drivers/acpi/video_detect.c | 14 +- drivers/platform/x86/thinkpad_acpi.c | 31 ++- drivers/video/backlight/backlight.c | 31 +++ include/linux/backlight.h | 4 + 6 files changed, 322 insertions(+), 205 deletions(-) -- 1.8.4.12.g2ea3df6 -- 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/