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 C28D6C433EF for ; Sat, 12 Feb 2022 02:45:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230358AbiBLCpU (ORCPT ); Fri, 11 Feb 2022 21:45:20 -0500 Received: from gmail-smtp-in.l.google.com ([23.128.96.19]:52790 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229541AbiBLCpU (ORCPT ); Fri, 11 Feb 2022 21:45:20 -0500 X-Greylist: delayed 911 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Fri, 11 Feb 2022 18:45:17 PST Received: from m12-11.163.com (m12-11.163.com [220.181.12.11]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 6652032065 for ; Fri, 11 Feb 2022 18:45:17 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=Message-ID:Date:MIME-Version:From:Subject; bh=hnD6/ MAj8dW+YkPvw4z+qYD8VxUZ1mt7MjT1Dw6did4=; b=iD+2qv9JC7RSbzjac3GYo 0wib5N9B6lJk8Rdf2OZXIxyIeJF6FZ7V9eW2oYHizfQN1Oalpb/f8/0ZI5JIQNXM +kmEsZegagb0Xh/0D5+vyjOB3uktQyz753hIf+5ysCMrmQvjffH3/k0amLnyRdtW iSjjLjpBdAN6IcPn5j4fRs= Received: from [192.168.3.109] (unknown [218.201.129.19]) by smtp7 (Coremail) with SMTP id C8CowAC37hqpGwdifV9fCg--.37742S2; Sat, 12 Feb 2022 10:30:02 +0800 (CST) Message-ID: <11b64eb6-d0bb-6cfb-776f-5e6623dd984e@163.com> Date: Sat, 12 Feb 2022 10:29:25 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.5.0 To: dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org From: qianfan Subject: fbtft gpio backlight Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-CM-TRANSID: C8CowAC37hqpGwdifV9fCg--.37742S2 X-Coremail-Antispam: 1Uf129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7v73 VFW2AGmfu7bjvjm3AaLaJ3UbIYCTnIWIevJa73UjIFyTuYvjxUoWlvUUUUU X-Originating-IP: [218.201.129.19] X-CM-SenderInfo: htld0w5dqj3xxmlqqiywtou0bp/xtbB2AKl7WBHIrLMcgAAsb Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org Hi: fbtft_register_backlight assume backlight is off, get polarity from current state of pin. but the led gpio is requested by GPIOD_OUT_LOW flag, which means the gpio state when fbtft_register_backlight is always low. Is it a bug? Thanks