From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sven Zeisberg Subject: How to transfer more than 2 channels between i.MX25 & AD1938 using SSI? Date: Thu, 26 Aug 2010 17:30:18 +0200 Message-ID: <4C76888A.50409@googlemail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail-bw0-f51.google.com (mail-bw0-f51.google.com [209.85.214.51]) by alsa0.perex.cz (Postfix) with ESMTP id 34D0A24997 for ; Thu, 26 Aug 2010 17:30:29 +0200 (CEST) Received: by bwz4 with SMTP id 4so1276324bwz.38 for ; Thu, 26 Aug 2010 08:30:29 -0700 (PDT) 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: alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org Hi, has anybody succeeded to transfer more than 2 audio channels between i.MX25 and a CODEC throught the i.MX25 SSI Port? We have succeeded to set the CODEC (AD1938) as Master to the required mode (TDM with 8 Timeslots and 32 Bit per Timeslot). However, as soon as we start to play a wav file with aplay, we can see on the logic analyzer that the data format on the SSI lines is reset to a stereo mode (2 channels with frame sync changing level between channels). In the imx-ssi driver, I can see that .channel_max = 2 - therefore my question: does this driver support more than two channels at all? BR Sven