From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754997AbbAZNVb (ORCPT ); Mon, 26 Jan 2015 08:21:31 -0500 Received: from arroyo.ext.ti.com ([192.94.94.40]:38999 "EHLO arroyo.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754733AbbAZNV2 (ORCPT ); Mon, 26 Jan 2015 08:21:28 -0500 Message-ID: <54C63F1C.6010703@ti.com> Date: Mon, 26 Jan 2015 15:20:28 +0200 From: Peter Ujfalusi User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0 MIME-Version: 1.0 To: Pavel Machek , , , , kernel list , linux-arm-kernel , , , , , , Subject: Re: 3.19 on Nokia n900: audio quality awful References: <20150106170433.GA5408@amd> <20150118120139.GA1509@amd> In-Reply-To: <20150118120139.GA1509@amd> Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 01/18/2015 02:01 PM, Pavel Machek wrote: > Hi! > > If you have any idea about playback problems, help would be still > welcome. I'll have to do bisect, otherwise, and it will not be easy. > >> In 3.18, sound is nice and clear. >> >> In 3.19, sound is unusable. It produces nasty tone when it should be >> quiet, and there's at least as much noise as is sound. >> >> Unfortunately, list of mixers also changed (and there's cca 120 >> settings), but a) it does not work with the old list and b) nothing I >> could figure out did make the sound usable. Some setting resulted in >> even more noise. >> >> Any idea what could have caused it? > > I tried audio recording this time. > > In 2.6.28-nokia, it is neccessary to set "Input select" na "digital > mic", then it works. Input select being in "playback" option makes it > easy to miss. > > In 3.18 and 3.19-rc3, all I can record are zeros. > > Does playback/recording work for you on OMAP 3430-based machines? Same codec (tlv320aic3106) works fine on my am335x and omap-l138 boards. BeagleBoard-xM also fine with twl4030 codec. I don't have my n900 in hacking mode (it is still in use time-to-time) but looking at the dts file: you might want to add ai3x-micbias-vg property to the aic3x nodes to select the correct mic bias voltage. I can't recall what is appropriate for n900, but 2.6.28-nokia sources might give you the answer. -- Péter