From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from casper.infradead.org ([85.118.1.10]:54898 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754143Ab1GVMts (ORCPT ); Fri, 22 Jul 2011 08:49:48 -0400 Message-ID: <4E2971D4.1060109@infradead.org> Date: Fri, 22 Jul 2011 09:49:24 -0300 From: Mauro Carvalho Chehab MIME-Version: 1.0 To: Stas Sergeev CC: linux-media@vger.kernel.org Subject: Re: [patch][saa7134] do not change mute state for capturing audio References: <4E19D2F7.6060803@list.ru> <4E1E05AC.2070002@infradead.org> <4E1E0A1D.6000604@list.ru> <4E1E1571.6010400@infradead.org> <4E1E8108.3060305@list.ru> <4E1F9A25.1020208@infradead.org> <4E22AF12.4020600@list.ru> <4E22CCC0.8030803@infradead.org> <4E24BEB8.4060501@redhat.com> <4E257FF5.4040401@infradead.org> <4E258B60.6010007@list.ru> <4E25906D.3020200@infradead.org> <4E259B0C.90107@list.ru> <4E25A26A.2000204@infradead.org> <4E25A7C2.3050609@list.ru> <4E25C7AE.5020503@infradead.org> <4E25CF35.7000802@list.ru> <4E25DB37.8020609@infradead.org> <4E25FDE4.7040805@list.ru> <4E262772.9060509@infradead.org> <4E266799.8030706@list.ru> <4E26AEC0.5000405@infradead.org> <4E26B1E7.2080107@list.ru> <4E26B29B.4010109@infradead.org> <4E292BED.60108@list.ru> <4E296D00.9040608@infradead.org> <4E296F6C.9080107@list.ru> In-Reply-To: <4E296F6C.9080107@list.ru> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-media-owner@vger.kernel.org List-ID: Em 22-07-2011 09:39, Stas Sergeev escreveu: > 22.07.2011 16:28, Mauro Carvalho Chehab wrote: >> In this specific case, applications like mplayer, >> using the alsa parameters for streaming will stop work, as mplayer >> won't touch at the mixer or at the V4L mute control. So, >> it will have the same practical effect of a kernel bug at the >> audio part of the driver. > Let me quote you again: > --- > Some applications like mplayer don't use V4L2_CID_AUDIO_MUTE to unmute a > video device. They assume the current behavior that starting video also > unmutes audio. Let me rephase it: Some applications like mplayer don't use V4L2_CID_AUDIO_MUTE to unmute a video device. They assume the current behavior that starting audio on a video board also unmutes audio. > --- > Could you please explain how my patch breaks > "starting video also unmutes audio"? I haven't touched > anything related to "starting video", so, if starting video > used to unmute audio, it will keep it that way. > Can you tell me how exactly I can reproduce that breakage?