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 A66F0C3DA7D for ; Tue, 3 Jan 2023 18:40:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238325AbjACSkD (ORCPT ); Tue, 3 Jan 2023 13:40:03 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49600 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234022AbjACSj7 (ORCPT ); Tue, 3 Jan 2023 13:39:59 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A03FB13D4C; Tue, 3 Jan 2023 10:39:50 -0800 (PST) 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 dfw.source.kernel.org (Postfix) with ESMTPS id 0F6AD614F0; Tue, 3 Jan 2023 18:39:50 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A637BC43398; Tue, 3 Jan 2023 18:39:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1672771189; bh=imEYwgAC/dH8lSJZo74E+eAnfm3WoSPBrWYHOX4C0rg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=OQu2wC/XigJEjEHBpl/0pReM6VgeNw+TvvMJq5dMqGmXoibQSw5pmzSsIK7j1lmYq TUk3W6hCbGEh0jUhxrQeadpXc/3THwrAYfkQbRF4Ek2ZHWF5Ak4sfzU++Efcp5tuR8 grtdnWqWdZQdSWXn5HojGxZE/IAEuBgiA20u3fG89UXbBrqsyghuW59Vl1Hcvcb4ZK mBgIf+R082N2NldScD3YPztO6E1fWyT9FfFPxKJh+7H4fvaQ4L/81DKgm9lxMTahxA rdLLQNgiiA4GsnRaSoj/KkYlZOkgxqNfc/wByamILb6y3jzYnfiKidBJajInJPApgU 1wVHE1YfhWe/Q== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Mario Limonciello , Hans de Goede , "Rafael J . Wysocki" , Sasha Levin , rafael@kernel.org, linux-acpi@vger.kernel.org Subject: [PATCH AUTOSEL 6.1 05/10] ACPI: video: Don't enable fallback path for creating ACPI backlight by default Date: Tue, 3 Jan 2023 13:39:29 -0500 Message-Id: <20230103183934.2022663-5-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20230103183934.2022663-1-sashal@kernel.org> References: <20230103183934.2022663-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org From: Mario Limonciello [ Upstream commit 5aa9d943e9b6bf6e6023645cbe7ce7d5ed84baf4 ] The ACPI video detection code has a module parameter `register_backlight_delay` which is currently configured to 8 seconds. This means that if after 8 seconds of booting no native driver has created a backlight device then the code will attempt to make an ACPI video backlight device. This was intended as a safety mechanism with the backlight overhaul that occurred in kernel 6.1, but as it doesn't appear necesssary set it to be disabled by default. Suggested-by: Hans de Goede Signed-off-by: Mario Limonciello Reviewed-by: Hans de Goede Signed-off-by: Rafael J. Wysocki Signed-off-by: Sasha Levin --- drivers/acpi/acpi_video.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/drivers/acpi/acpi_video.c b/drivers/acpi/acpi_video.c index f64fdb029090..0c79f463fbfd 100644 --- a/drivers/acpi/acpi_video.c +++ b/drivers/acpi/acpi_video.c @@ -70,11 +70,7 @@ module_param(device_id_scheme, bool, 0444); static int only_lcd = -1; module_param(only_lcd, int, 0444); -/* - * Display probing is known to take up to 5 seconds, so delay the fallback - * backlight registration by 5 seconds + 3 seconds for some extra margin. - */ -static int register_backlight_delay = 8; +static int register_backlight_delay; module_param(register_backlight_delay, int, 0444); MODULE_PARM_DESC(register_backlight_delay, "Delay in seconds before doing fallback (non GPU driver triggered) " -- 2.35.1