From patchwork Tue Mar 31 00:17:37 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Randy Dunlap X-Patchwork-Id: 194320 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=-5.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS,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 EE815C2D0E9 for ; Tue, 31 Mar 2020 00:17:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C1A41206F5 for ; Tue, 31 Mar 2020 00:17:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="CMoURB9X" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729060AbgCaARm (ORCPT ); Mon, 30 Mar 2020 20:17:42 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:48956 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729019AbgCaARm (ORCPT ); Mon, 30 Mar 2020 20:17:42 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: Content-Type:MIME-Version:Date:Message-ID:Subject:From:Cc:To:Sender:Reply-To: Content-ID:Content-Description:In-Reply-To:References; bh=21yG7P+pD4KJzJpZlNZgHTRJCQuMzOkPgSdwN+wXzXw=; b=CMoURB9X9+WTmwOK6yajm6s91M k4grT8SPVE0oCzP/jGqecuOm2xBDa/PIl4WxIwtWGFUuUy1maOBEU68qgOPyesSJAloNgiRn80BJY Yc7tZhCd64WP7sHPYyR7gXO2rBv/z74jAeb+shH6hJBkC3dSAppA88tcVs2Thcmrejfg0t12WZ29q WxfSRVwQ+haBJTRD+bM84xKeB035EpdVikGIFGKZaz8Y7nNiwMtxbUD1teSPsX+yPETbIooXyy3r6 R8RIySGdt/q3NrsOLUd8XmcPCvBTIqZ9O+fjE6cubhdnGocGU9MWZ+pUTlo924taMYKf15pwPbOJD D53M/h9g==; Received: from [2601:1c0:6280:3f0:897c:6038:c71d:ecac] by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1jJ4b5-0007Yu-4D; Tue, 31 Mar 2020 00:17:39 +0000 To: LKML , ACPI Devel Mailing List Cc: Zhang Rui , Hans de Goede , "Rafael J. Wysocki" , Len Brown From: Randy Dunlap Subject: [PATCH] ACPI; update docs for "acpi_backlight" kernel parameter options Message-ID: <19409af2-f38a-6760-c7b3-aa5794a94df0@infradead.org> Date: Mon, 30 Mar 2020 17:17:37 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.6.0 MIME-Version: 1.0 Content-Language: en-US Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org From: Randy Dunlap Update the Documentation for "acpi_backlight" by adding 2 new options (native and none). Signed-off-by: Randy Dunlap Cc: linux-acpi@vger.kernel.org Cc: Zhang Rui Cc: Hans de Goede Cc: "Rafael J. Wysocki" Cc: Len Brown --- Documentation/admin-guide/kernel-parameters.txt | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) --- linux-next-20200330.orig/Documentation/admin-guide/kernel-parameters.txt +++ linux-next-20200330/Documentation/admin-guide/kernel-parameters.txt @@ -22,11 +22,13 @@ default: 0 acpi_backlight= [HW,ACPI] - acpi_backlight=vendor - acpi_backlight=video - If set to vendor, prefer vendor specific driver + { vendor | video | native | none } + If set to vendor, prefer vendor-specific driver (e.g. thinkpad_acpi, sony_acpi, etc.) instead of the ACPI video.ko driver. + If set to video, use the ACPI video.ko driver. + If set to native, use the device's native backlight mode. + If set to none, disable the ACPI backlight interface. acpi_force_32bit_fadt_addr force FADT to use 32 bit addresses rather than the