-----Original Message----- From: Jarkko Nikula [mailto:jhnikula@gmail.com] Sent: Tuesday, May 12, 2009 12:10 PM To: Aggarwal, Anuj Cc: Arun KS; Peter Ujfalusi; sakoman@gmail.com; alsa-devel@alsa- project.org; broonie@opensource.wolfsonmicro.com; Anuj Aggarwal Subject: Re: [alsa-devel] [PATCH 0/1] ASoC: TWL4030: Headset ramp down fix
On Tue, 12 May 2009 11:44:21 +0530 "Aggarwal, Anuj" anuj.aggarwal@ti.com wrote:
I haven't noticed (yet) but can you post your use case here how to reproduce it. It would help to hunt is the problem OMAP & TWL4030 specific or is it somewhere else.
[Aggarwal, Anuj] There is nothing specific to my use case. I am just trying to playback an audio file (16bit, stereo, 44.1khz) and hearing this sine-tonish sound everytime in the beginning. This artifact was not there when I was using ALSA; it started coming only when I moved to the newer ASoC framework.
What HW do you use for testing and what was the previous kernel having ALSA drivers for it? Can you reproduce the problem with standard aplay from alsa-utils?
For instance I'm curious to know can we have some unknown issue with the 1 ksample FIFO inside OMAP3 McBSP2 which is not handled right now with the ASoC drivers but if the another kernel has workaround for it.
[Aggarwal, Anuj] I am currently working on OMAP3 EVM, on 2.6.29-rc3 kernel. The previous kernel version where I was using ALSA was 2.6.22. I am using aplay only and observing this artifact on ASoC alone.
-- Jarkko