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 367BDECAAA1 for ; Mon, 24 Oct 2022 17:17:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234535AbiJXRQ6 (ORCPT ); Mon, 24 Oct 2022 13:16:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33114 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233090AbiJXRQd (ORCPT ); Mon, 24 Oct 2022 13:16:33 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6C24E187097 for ; Mon, 24 Oct 2022 08:51:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1666626609; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=St4Oo1+ZOBe0lGhOZfdzJtwdKULc2yTF38gsrCy5cIs=; b=hB8c1OSRjCEv9KDBqzrnFqkidQMjM+tkDJ8Ga+AdswYMOEgTgCPJ1j6wsCo95b2Petvbej +7CUyUje5XBxdMwyaAa4xIwwyzwto5DXgDeI3NhaqCTZNDXwR60dZuAIcu7dMM7Na5kC3j BND2Qi3B9Jo2CIcJJBNgaUT0i0xFRhE= Received: from mail-ed1-f69.google.com (mail-ed1-f69.google.com [209.85.208.69]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_128_GCM_SHA256) id us-mta-659-lPmyy-T7PTisCUyRPOWjNg-1; Mon, 24 Oct 2022 10:32:42 -0400 X-MC-Unique: lPmyy-T7PTisCUyRPOWjNg-1 Received: by mail-ed1-f69.google.com with SMTP id h9-20020a05640250c900b00461d8ee12e2so2510123edb.23 for ; Mon, 24 Oct 2022 07:32:41 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=St4Oo1+ZOBe0lGhOZfdzJtwdKULc2yTF38gsrCy5cIs=; b=zVY4rzM5dElev7XPFRZZ4bn3raUGLZAi35eqcnc3fsEZRDJ4LLqYbqjRxYnolNYiH7 f664OybVL3hNZMnHV8v6sqvdyH595/+Y9M0uIZ/ZYy5yxxz+kkA3cNWNbxuT8vOikHSJ ryCsJP9A3KvJ05xx1WNo9Wykz8R92IADKy901HKtU+kfIgEgXUKHNwKSS8J9wrtl2EE9 R8JzfVZEjeFfRmZm0gMkv8JS1WcZ0jMLhZypYKwuNAVLd+udYRamOCInNi0jIVAkpJD1 C5D3p62ZbYIfyzjByNLmbyd4sIxiD3yViwT7PGeE8KuhU5XyfkmbDlWMRJsl5rtvfW4i EJaw== X-Gm-Message-State: ACrzQf1Bgv++yjNTIUetYujwNKoq7AqAqXd+WCQuk2r5ZO3ZrInH2RXl xGbnSiaPhK8Fv/dBKwfBU34U3dZOYoS8cCz/TGUjWeHmhgeM4FlMN2H8Xvk7+LJbIpL08bycfuA DxG0q/vNhKrxVpp0jOnfq8jAf X-Received: by 2002:a05:6402:2710:b0:45c:d7b4:6948 with SMTP id y16-20020a056402271000b0045cd7b46948mr30996978edd.215.1666621960895; Mon, 24 Oct 2022 07:32:40 -0700 (PDT) X-Google-Smtp-Source: AMsMyM7FteBuj1i+suD+fzUBHUwobCQ42/zPj3LuJ2XNuBwLGr/mL3KqKm8I/n6s3gjZh8Jv/+v1Ag== X-Received: by 2002:a05:6402:2710:b0:45c:d7b4:6948 with SMTP id y16-20020a056402271000b0045cd7b46948mr30996964edd.215.1666621960720; Mon, 24 Oct 2022 07:32:40 -0700 (PDT) Received: from [10.40.98.142] ([78.108.130.194]) by smtp.gmail.com with ESMTPSA id ed5-20020a056402294500b00461621cae1fsm4010174edb.16.2022.10.24.07.32.39 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 24 Oct 2022 07:32:39 -0700 (PDT) Message-ID: Date: Mon, 24 Oct 2022 16:32:38 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.3.1 Subject: Re: [PATCH v2] ACPI: video: Fix missing native backlight on Chromebooks Content-Language: en-US To: Dmitry Osipenko , "Rafael J. Wysocki" , Len Brown , Akihiko Odaki , Dmitry Torokhov , Sean Paul Cc: kernel@collabora.com, linux-acpi@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org References: <20221024141210.67784-1-dmitry.osipenko@collabora.com> From: Hans de Goede In-Reply-To: <20221024141210.67784-1-dmitry.osipenko@collabora.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, On 10/24/22 16:12, Dmitry Osipenko wrote: > Chromebooks don't have backlight in ACPI table, they suppose to use > native backlight in this case. Check presence of the CrOS embedded > controller ACPI device and prefer the native backlight if EC found. > > Suggested-by: Hans de Goede > Fixes: 2600bfa3df99 ("ACPI: video: Add acpi_video_backlight_use_native() helper") > Signed-off-by: Dmitry Osipenko > --- > > Changelog: > > v2: - Added explanatory comment to the code and added check for the > native backlight presence, like was requested by Hans de Goede. Thanks this version looks good to me: Reviewed-by: Hans de Goede Rafael, can you pick this up and send it in a fixes pull-req for 6.1 to Linus? Or shall I pick this one up and include it in my next pull-req? Regards, Hans > > drivers/acpi/video_detect.c | 12 ++++++++++++ > 1 file changed, 12 insertions(+) > > diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c > index 0d9064a9804c..9cd8797d12bb 100644 > --- a/drivers/acpi/video_detect.c > +++ b/drivers/acpi/video_detect.c > @@ -668,6 +668,11 @@ static const struct dmi_system_id video_detect_dmi_table[] = { > { }, > }; > > +static bool google_cros_ec_present(void) > +{ > + return acpi_dev_found("GOOG0004"); > +} > + > /* > * Determine which type of backlight interface to use on this system, > * First check cmdline, then dmi quirks, then do autodetect. > @@ -730,6 +735,13 @@ static enum acpi_backlight_type __acpi_video_get_backlight_type(bool native) > return acpi_backlight_video; > } > > + /* > + * Chromebooks that don't have backlight handle in ACPI table > + * are supposed to use native backlight if it's available. > + */ > + if (google_cros_ec_present() && native_available) > + return acpi_backlight_native; > + > /* No ACPI video (old hw), use vendor specific fw methods. */ > return acpi_backlight_vendor; > }