From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Brown Subject: Re: [PATCH] ASoC: tegra: Add DAPM widgets/routes for Harmony Date: Thu, 13 Jan 2011 22:38:35 +0000 Message-ID: <20110113223834.GA13717@opensource.wolfsonmicro.com> References: <1294957328-15869-1-git-send-email-swarren@nvidia.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from opensource2.wolfsonmicro.com (opensource.wolfsonmicro.com [80.75.67.52]) by alsa0.perex.cz (Postfix) with ESMTP id 11D8C103B6A for ; Thu, 13 Jan 2011 23:38:21 +0100 (CET) Content-Disposition: inline In-Reply-To: <1294957328-15869-1-git-send-email-swarren@nvidia.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: alsa-devel-bounces@alsa-project.org Errors-To: alsa-devel-bounces@alsa-project.org To: Stephen Warren Cc: linux-tegra@vger.kernel.org, alsa-devel@alsa-project.org, lrg@slimlogic.co.uk List-Id: alsa-devel@alsa-project.org On Thu, Jan 13, 2011 at 03:22:08PM -0700, Stephen Warren wrote: > Question: Harmony has a mono mic attached to the left input channel. > However, the I2S controller only supports stereo. Is it possible to > duplicate the mic input to both channels in ALSA? I know the WM8903 > can do it via the WM8903_AUDIO_INTERFACE_0 register, but I'm not > sure how to request that in ALSA-speak. It looks like this same setup > applies to many other platforms, but I couldn't see how the issue was > solved, if at all. It needs implementing it in the CODEC driver, it's not currently supported as the feature is very rarely used. I'll add it to the list to look at, like I say I'm holding off until the merge window closes so that the clock changes (and hopefully SD card support) get a chance to merge into the tree and allow things to work out of the box as far as possible.