From mboxrd@z Thu Jan 1 00:00:00 1970 From: Timur Tabi Subject: Re: MPC5200 I2S driver for ASoC Date: Wed, 01 Aug 2007 12:53:33 -0500 Message-ID: <46B0C89D.50704@freescale.com> References: <46B0C3EE.5020401@acdstar.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from de01egw02.freescale.net (de01egw02.freescale.net [192.88.165.103]) by alsa0.perex.cz (Postfix) with ESMTP id 39CE510384B for ; Wed, 1 Aug 2007 19:53:40 +0200 (CEST) In-Reply-To: <46B0C3EE.5020401@acdstar.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: lokowich Cc: ALSA-devel List-Id: alsa-devel@alsa-project.org lokowich wrote: > I'm integrating a ALSA driver for an MPC5200 into the ASoC layer, > similar to my successful effort for a PXA255 board. Can you provide your code? I'm working on ASoC support for another MPC SOC, so we need to synchronize our development. > I'm modeling the > DMA and ALSA interfaces per ac97mgt driver found in the Lite5200B BSP, > rather than the BestComm API example in the 2.4 kernel. The > speaker-test with 400Hz sine wave is working, but has a slight audible > jitter. A wav file output using aplay produces white noise. What kind of audio samples are you trying to play? Since the MPC5200 is typically big-endian, you probably can only play S16_BE samples instead of S16_LE samples. -- Timur Tabi Linux Kernel Developer @ Freescale