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=-5.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,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 DA278C56201 for ; Thu, 12 Nov 2020 15:06:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 85E962078D for ; Thu, 12 Nov 2020 15:06:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728527AbgKLPGe (ORCPT ); Thu, 12 Nov 2020 10:06:34 -0500 Received: from mout.kundenserver.de ([212.227.17.13]:36119 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728227AbgKLPGc (ORCPT ); Thu, 12 Nov 2020 10:06:32 -0500 Received: from [192.168.1.155] ([77.2.56.136]) by mrelayeu.kundenserver.de (mreue108 [212.227.15.183]) with ESMTPSA (Nemesis) id 1Mwwm5-1kOB6I1LZL-00yRYU; Thu, 12 Nov 2020 16:06:17 +0100 Subject: Re: [PATCH] platform/x86: dell-privacy: Add support for new privacy driver To: "Limonciello, Mario" , Matthew Garrett , "Yuan, Perry" Cc: "hdegoede@redhat.com" , "mgross@linux.intel.com" , "pali@kernel.org" , "linux-kernel@vger.kernel.org" , "platform-driver-x86@vger.kernel.org" References: <20201103125542.8572-1-Perry_Yuan@Dell.com> <20201104014915.45tbmnrqvccbrd2k@srcf.ucam.org> <20201111072456.tkwdzuq2wa7zvbod@srcf.ucam.org> From: "Enrico Weigelt, metux IT consult" Message-ID: Date: Thu, 12 Nov 2020 16:06:13 +0100 User-Agent: Mozilla/5.0 (X11; Linux i686 on x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.12.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: tl Content-Transfer-Encoding: 8bit X-Provags-ID: V03:K1:9dO9kWhJK+Yiv5WXFGQ6CdJgiu7btiqPDtQvE3PtEsZFKMnKKgw G5371blyA1xBAviVZWATvXZu5XwGqiGHFM+vWs5XY3+elGTsqsAmWEHJOVTcOp3D9LwPNpw YEDkLj6K0BPhyRdyOcxjvU8Tn4G1+V1EaYaJMTms11izmyO+tPAcWquSQmdxHA2FoLhVIXo PhxgTEEAYVvHHYEoO2/og== X-UI-Out-Filterresults: notjunk:1;V03:K0:jASyvmm6cYU=:aiwJkp9gIZc0fNVu+KOCkU GC8gn4/yqG5nH3i8DDbjnj20hIaK71nnaIRUQgSOgh32zqxZlFsr9S2SVt5f/ouADG1RdHUar CI5a1v2cvalBLnZCUg7JbNfqBFNBr8Moua8oDOuPuyx3SEtcKjoYdX8+yn6X75CKqd0Bocb7Y CMpblCrbgQuMxwTZk68XAVs7hY0eKSXFFIe+1/+kdjUepCFdVcXLn0LR4IHJ6EgRT0CXYfF7N g2HKyye7ymZUbnyoGgDhFsG9AAW5yiO1QxoU+tKQmuaVKs0EgglXwmpStcaXbNI4FsLSFFIfy j/t+9OSMpAlrb1fr+NcnGHO6lkADlOSngjHrUpkqK13D+AEsUzoBI/EaMTHmT8sY6o5Cb/oyx UoTLXYTfhCVssH9j64HyRHQ2J9eFgsL20HHIbH/2tRywJvz4gNYgLbSxN6LR8 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 11.11.20 15:30, Limonciello, Mario wrote: Hi, > Pressing the mute key activates a time delayed circuit to physically cut > off the mute. The LED is in the same circuit, so it reflects the true > state of the HW mute. The reason for the EC "ack" is so that software > can first invoke a SW mute before the HW circuit is cut off. Without SW > cutting this off first does not affect the time delayed muting or status > of the LED but there is a possibility of a "popping" noise leading to a > poor user experience. how long is that timeout ? > Exposing as an LED device allows the codec drivers notification path to > EC ACK to work. Which driver exactly ? Who's gonna access this LED ? --mtx -- --- Hinweis: unverschlüsselte E-Mails können leicht abgehört und manipuliert werden ! Für eine vertrauliche Kommunikation senden Sie bitte ihren GPG/PGP-Schlüssel zu. --- Enrico Weigelt, metux IT consult Free software and Linux embedded engineering info@metux.net -- +49-151-27565287