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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0FCF7C433F5 for ; Fri, 25 Mar 2022 15:05:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1359506AbiCYPGr (ORCPT ); Fri, 25 Mar 2022 11:06:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34232 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1359508AbiCYPGl (ORCPT ); Fri, 25 Mar 2022 11:06:41 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6E405D95F5; Fri, 25 Mar 2022 08:05:02 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 0551DB828FD; Fri, 25 Mar 2022 15:05:01 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 481E0C340F1; Fri, 25 Mar 2022 15:04:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1648220699; bh=iwbIWr6epAa0IxLzIYm66uOsbCIzJYOcAod8UUTSvEM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Tgk/psVld1OWZ2/wMDArLn0bsFN0t4YeVEEMhe17qq+010xkHgAYbYRDCAET+y8fC yr9ty/7RBo3Jy8+HPJ7Z9aeb+K/NPTYKhL/KweiHEciWavEsW3bE651piJhjYJgdyO d03ZUevPnKnmnxjgIyErXqiWG55XoaILj3taz9+E= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Werner Sembach , "Rafael J. Wysocki" Subject: [PATCH 4.9 12/14] ACPI: video: Force backlight native for Clevo NL5xRU and NL5xNU Date: Fri, 25 Mar 2022 16:04:40 +0100 Message-Id: <20220325150416.056811855@linuxfoundation.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220325150415.694544076@linuxfoundation.org> References: <20220325150415.694544076@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Werner Sembach commit c844d22fe0c0b37dc809adbdde6ceb6462c43acf upstream. Clevo NL5xRU and NL5xNU/TUXEDO Aura 15 Gen1 and Gen2 have both a working native and video interface. However the default detection mechanism first registers the video interface before unregistering it again and switching to the native interface during boot. This results in a dangling SBIOS request for backlight change for some reason, causing the backlight to switch to ~2% once per boot on the first power cord connect or disconnect event. Setting the native interface explicitly circumvents this buggy behaviour by avoiding the unregistering process. Signed-off-by: Werner Sembach Cc: All applicable Signed-off-by: Rafael J. Wysocki Signed-off-by: Greg Kroah-Hartman --- drivers/acpi/video_detect.c | 75 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 75 insertions(+) --- a/drivers/acpi/video_detect.c +++ b/drivers/acpi/video_detect.c @@ -135,6 +135,81 @@ static const struct dmi_system_id video_ DMI_MATCH(DMI_PRODUCT_NAME, "UL30A"), }, }, + /* + * Clevo NL5xRU and NL5xNU/TUXEDO Aura 15 Gen1 and Gen2 have both a + * working native and video interface. However the default detection + * mechanism first registers the video interface before unregistering + * it again and switching to the native interface during boot. This + * results in a dangling SBIOS request for backlight change for some + * reason, causing the backlight to switch to ~2% once per boot on the + * first power cord connect or disconnect event. Setting the native + * interface explicitly circumvents this buggy behaviour, by avoiding + * the unregistering process. + */ + { + .callback = video_detect_force_native, + .ident = "Clevo NL5xRU", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"), + DMI_MATCH(DMI_BOARD_NAME, "NL5xRU"), + }, + }, + { + .callback = video_detect_force_native, + .ident = "Clevo NL5xRU", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "SchenkerTechnologiesGmbH"), + DMI_MATCH(DMI_BOARD_NAME, "NL5xRU"), + }, + }, + { + .callback = video_detect_force_native, + .ident = "Clevo NL5xRU", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Notebook"), + DMI_MATCH(DMI_BOARD_NAME, "NL5xRU"), + }, + }, + { + .callback = video_detect_force_native, + .ident = "Clevo NL5xRU", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"), + DMI_MATCH(DMI_BOARD_NAME, "AURA1501"), + }, + }, + { + .callback = video_detect_force_native, + .ident = "Clevo NL5xRU", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"), + DMI_MATCH(DMI_BOARD_NAME, "EDUBOOK1502"), + }, + }, + { + .callback = video_detect_force_native, + .ident = "Clevo NL5xNU", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"), + DMI_MATCH(DMI_BOARD_NAME, "NL5xNU"), + }, + }, + { + .callback = video_detect_force_native, + .ident = "Clevo NL5xNU", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "SchenkerTechnologiesGmbH"), + DMI_MATCH(DMI_BOARD_NAME, "NL5xNU"), + }, + }, + { + .callback = video_detect_force_native, + .ident = "Clevo NL5xNU", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Notebook"), + DMI_MATCH(DMI_BOARD_NAME, "NL5xNU"), + }, + }, /* * These models have a working acpi_video backlight control, and using