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 X-Spam-Level: X-Spam-Status: No, score=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 07C4DC433E0 for ; Thu, 2 Jul 2020 10:51:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E083A2075D for ; Thu, 2 Jul 2020 10:51:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728456AbgGBKv1 (ORCPT ); Thu, 2 Jul 2020 06:51:27 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:39782 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726483AbgGBKv0 (ORCPT ); Thu, 2 Jul 2020 06:51:26 -0400 Received: from [222.129.43.254] (helo=[192.168.1.10]) by youngberry.canonical.com with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.86_2) (envelope-from ) id 1jqwoL-00013y-I3; Thu, 02 Jul 2020 10:51:22 +0000 Subject: Re: [PATCH] platform/x86: thinkpad_acpi: not loading brightness_init when _BCL invalid To: Andy Shevchenko Cc: mapengyu@gmail.com, Henrique de Moraes Holschuh , Darren Hart , Andy Shevchenko , Thinkpad-acpi devel ML , Platform Driver , Linux Kernel Mailing List References: <20200702085520.16901-1-aaron.ma@canonical.com> From: Aaron Ma Autocrypt: addr=aaron.ma@canonical.com; prefer-encrypt=mutual; keydata= mQENBFffeLkBCACi4eE4dPsgWN6B9UDOVcAvb5QgU/hRG6yS0I1lGKQv4KA+bke0c5g8clbO 9gIlIl2bityfA9NzBsDik4Iei3AxMbFyxv9keMwcOFQBIOZF0P3f05qjxftF8P+yp9QTV4hp BkFzsXzWRgXN3r8hU8wqZybepF4B1C83sm2kQ5A5N0AUGbZli9i2G+/VscG9sWfLy8T7f4YW MjmlijCjoV6k29vsmTWQPZ7EApNpvR5BnZQPmQWzkkr0lNXlsKcyLgefQtlwg6drK4fe4wz0 ouBIHJEiXE1LWK1hUzkCUASra4WRwKk1Mv/NLLE/aJRqEvF2ukt3uVuM77RWfl7/H/v5ABEB AAG0IUFhcm9uIE1hIDxhYXJvbi5tYUBjYW5vbmljYWwuY29tPokBNwQTAQgAIQUCV994uQIb AwULCQgHAgYVCAkKCwIEFgIDAQIeAQIXgAAKCRDNxCzQfVU6ntJ9B/9aVy0+RkLqF9QpLmw+ LAf1m3Fd+4ZarPTerqDqkLla3ekYhbrEtlI1mYuB5f+gtrIjmcW27gacHdslKB9YwaL8B4ZB GJKhcrntLg4YPzYUnXZkHHTv1hMw7fBYw82cBT+EbG0Djh6Po6Ihqyr3auHhfFcp1PZH4Mtq 6hN5KaDZzF/go+tRF5e4bn61Nhdue7mrhFSlfkzLG2ehHWmRV+S91ksH81YDFnazK0sRINBx V1S8ts3WJ2f1AbgmnDlbK3c/AfI5YxnIHn/x2ZdXj1P/wn7DgZHmpMy5DMuk0gN34NLUPLA/ cHeKoBAF8emugljiKecKBpMTLe8FrVOxbkrauQENBFffeLkBCACweKP3Wx+gK81+rOUpuQ00 sCyKzdtMuXXJ7oL4GzYHbLfJq+F+UHpQbytVGTn3R5+Y61v41g2zTYZooaC+Hs1+ixf+buG2 +2LZjPSELWPNzH9lsKNlCcEvu1XhyyHkBDbnFFHWlUlql3nSXMo//dOTG/XGKaEaZUxjCLUC 8ehLc16DJDvdXsPwWhHrCH/4k92F6qQ14QigBMsl75jDTDJMEYgRYEBT1D/bwxdIeoN1BfIG mYgf059RrWax4SMiJtVDSUuDOpdwoEcZ0FWesRfbFrM+k/XKiIbjMZSvLunA4FIsOdWYOob4 Hh0rsm1G+fBLYtT+bE26OWpQ/lSn4TdhABEBAAGJAR8EGAEIAAkFAlffeLkCGwwACgkQzcQs 0H1VOp6p5Af/ap5EVuP1AhFdPD3pXLNrUUt72W3cuAOjXyss43qFC2YRjGfktrizsDjQU46g VKoD6EW9XUPgvYM+k8BJEoXDLhHWnCnMKlbHP3OImxzLRhF4kdlnLicz1zKRcessQatRpJgG NIiD+eFyh0CZcWBO1BB5rWikjO/idicHao2stFdaBmIeXvhT9Xp6XNFEmzOmfHps+kKpWshY 9LDAU0ERBNsW4bekOCa/QxfqcbZYRjrVQvya0EhrPhq0bBpzkIL/7QSBMcdv6IajTlHnLARF nAIofCEKeEl7+ksiRapL5Nykcbt4dldE3sQWxIybC94SZ4inENKw6I8RNpigWm0R5w== Message-ID: <2ecf4032-267c-32c8-361f-2396730aaa65@canonical.com> Date: Thu, 2 Jul 2020 18:51:12 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.9.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 7/2/20 5:30 PM, Andy Shevchenko wrote: > On Thu, Jul 2, 2020 at 11:55 AM Aaron Ma wrote: >> >> When _BCL invalid, disable thinkpad_acpi backlight brightness control. >> >> brightness_enable is already checked at the beginning, > >> Always print notice when enabled brightness control. > > Why? > Default brightness_enable = 2, so this message will always be printed as before Actually no change here. > ... > >> + pr_notice("thinkpad_acpi native brightness control enabled\n"); > > 'notice' level is quite high, why do we spam users with this? > Like above. Another reason is most thinkpads are using native gpu driver to control brightness, notice when thinkpad_acpi brightness is enabled. Aaron