From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shawn Guo Subject: Re: [PATCH v4 2/5] ASoC: Move standard kcontrol helpers to the component level Date: Sat, 10 May 2014 17:12:11 +0800 Message-ID: <20140510091209.GM2870@dragon> References: <1398165797-22997-3-git-send-email-lars@metafoo.de> <20140509150034.GH2870@dragon> <536CF16F.8010807@metafoo.de> <536CFBE7.3070805@metafoo.de> <20140510050747.GI2870@dragon> <536DCF6F.9020507@metafoo.de> <536DD108.2090607@metafoo.de> <20140510083131.GL2870@dragon> <536DE548.9050008@metafoo.de> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from na01-bl2-obe.outbound.protection.outlook.com (mail-bl2lp0203.outbound.protection.outlook.com [207.46.163.203]) by alsa0.perex.cz (Postfix) with ESMTP id 2F195261ADB for ; Sat, 10 May 2014 11:12:33 +0200 (CEST) Content-Disposition: inline In-Reply-To: <536DE548.9050008@metafoo.de> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: Lars-Peter Clausen Cc: "alsa-devel@alsa-project.org" , Mark Brown , Fabio Estevam , Liam Girdwood List-Id: alsa-devel@alsa-project.org On Sat, May 10, 2014 at 10:37:28AM +0200, Lars-Peter Clausen wrote: > On 05/10/2014 10:31 AM, Shawn Guo wrote: > >On Sat, May 10, 2014 at 09:11:04AM +0200, Lars-Peter Clausen wrote: > >>On 05/10/2014 09:04 AM, Lars-Peter Clausen wrote: > >>[..] > >>>>The error message only shows up with Debian wheezy and does not with > >>>>yocto rootfs. And even when the error message shows, the audio still > >>>>functions well on Debian wheezy. So it's just a noisy error message > >>>>for me which is only seen after your kernel patch. > >>> > >>>The keyword here is "seen". The error quite likely predated the commit, but > >>>it was silently discarded. > >>> > >>>regmap_read() returns -EBUSY when there is no cached register value and > >>>cache_only is set to true. But I'm not sure why that would happen, try to > >>>add some printks to _regmap_read() to see if this is the source and if it is > >>>why it is. > >> > >>Both SGTL5000_CHIP_ANA_ADC_CTRL and SGTL5000_CHIP_MIC_CTRL don't > >>have an entry in sgtl5000_reg_defaults. So if cache_only is true, > >>controls which use these registers will return -EBUSY when you try > >>to read or write them. > > > >Hmm, it's a wm8962 than sgtl5000 on board imx6q-sabresd. > > Ok, misread the boardname. But the issue will be the same. > cache_only = true and trying to read/update a register that is not > in the cache. Yea, you're right. When the error message shows up, _regmap_read() returns -EBUSY for reg WM8962_CLASS_D_CONTROL_1. But how do I find out why the reg is not in the cache? Shawn