From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Brown Subject: Re: [PATCH 4/7] ASoC: Fix Zylonite voice interface stereo configurations Date: Wed, 25 Feb 2009 16:54:59 +0000 Message-ID: <20090225165458.GF31637@sirena.org.uk> References: <20090225104701.GA20221@rakim.wolfsonmicro.main> <1235558902-20314-4-git-send-email-broonie@opensource.wolfsonmicro.com> <20090225160617.GH11203@buzzloop.caiaq.de> <20090225162241.GE31637@sirena.org.uk> <20090225164113.GI11203@buzzloop.caiaq.de> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from cassiel.sirena.org.uk (cassiel.sirena.org.uk [80.68.93.111]) by alsa0.perex.cz (Postfix) with ESMTP id C8E6B2438A for ; Wed, 25 Feb 2009 17:55:00 +0100 (CET) Content-Disposition: inline In-Reply-To: <20090225164113.GI11203@buzzloop.caiaq.de> 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: Daniel Mack Cc: alsa-devel@alsa-project.org, pHilipp Zabel List-Id: alsa-devel@alsa-project.org On Wed, Feb 25, 2009 at 05:41:13PM +0100, Daniel Mack wrote: > Is there a thread you can point me to or where have people reported such > things? Grep'ing the archives did unveil anything regarding this. Private e-mail only, sorry. > > The I2S frame length depends on the number of bits per sample. > Well, as far as I got it, these are different things in the register > set. The I2S frame is 64 bits per definition (32 bits for each channel), > and this is what the cs4270 requires to use. Ah, that's not true of I2S devices in general - most only require as many bit clocks as they have data. I've only ever tested with such devices. > The particular problem with the PXA SSP mode is that I've not yet seen a > configuration (neighter in slave nor in master mode) where it sends out > 16 bits of left channel information, followed by 16 bits of zeros, then > 16 bits of right channel and finally another 16bits of zeros (which > exactly what they talk about in the 'i2s via ssp' application note). > Has anyone ever got that? Not to my knowledge.