From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Brown Subject: Re: [PATCH] asoc/multi-component: fsl: add support for variable SSI FIFO depth Date: Thu, 5 Aug 2010 06:51:53 -0700 Message-ID: <20100805135153.GB14470@opensource.wolfsonmicro.com> References: <1280952264-21813-1-git-send-email-timur@freescale.com> <20100805111010.GA13146@rakim.wolfsonmicro.main> 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 E41B21038E7 for ; Thu, 5 Aug 2010 15:51:38 +0200 (CEST) Content-Disposition: inline In-Reply-To: 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: Timur Tabi Cc: alsa-devel@alsa-project.org, lrg@slimlogic.co.uk List-Id: alsa-devel@alsa-project.org On Thu, Aug 05, 2010 at 08:14:43AM -0500, Timur Tabi wrote: > On Thu, Aug 5, 2010 at 6:10 AM, Mark Brown > > My first thought with this is that it's not something I'd expect to be > > in the device tree at all - it looks like it's all properties of the > > silicon which I'd expect the drivers to be able to figure out for > > themselves without needing to be told by the device tree. > There is no way for the software to know what the FIFO depth is, so > this is the sort of thing that should be in the device tree. Are you saying that every DT for a system doing audio on a PowerPC system has to manually specify the depth of the FIFO on the silicon? That doesn't sound particularly sensible, and I had been under the impression that DT systems had a better way of coping with this.