linux-kernel - Re: [PATCH V1 1/3] ARM: clk-imx6sl: refine clock tree for SSI

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Date:	Fri, 12 Sep 2014 13:43:39 -0300
From:	Fabio Estevam <festevam@...il.com>
To:	Shengjiu Wang <shengjiu.wang@...escale.com>
Cc:	Shawn Guo <shawn.guo@...escale.com>,
	Sascha Hauer <kernel@...gutronix.de>,
	Russell King <linux@....linux.org.uk>,
	"robh+dt@...nel.org" <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH V1 1/3] ARM: clk-imx6sl: refine clock tree for SSI

On Fri, Sep 12, 2014 at 1:35 PM, Fabio Estevam <festevam@...il.com> wrote:
> On Tue, Sep 9, 2014 at 6:13 AM, Shengjiu Wang
> <shengjiu.wang@...escale.com> wrote:
>> Each SSI has "ssi", "ssi_ipg" clocks, and they share same gate bits.
>>
>> Signed-off-by: Shengjiu Wang <shengjiu.wang@...escale.com>
>
> This patch breaks audio playback on imx6q-sabresd:
>
> root@...escale /$ aplay /home/clarinet.wav
> Playing WAVE '/home/clarinet.wav' : Signed 16 bit Little Endian, Rate 44100 Hz,
> Mono
> underrun!!! (at least -1585992.581 ms long)
> underrun!!! (at least -1585992.585 ms long)
> underrun!!! (at least -1585992.586 ms long)
> underrun!!! (at least -1585992.586 ms long)
> underrun!!! (at least -1585992.586 ms long)
> underrun!!! (at least -1585992.586 ms long)
> underrun!!! (at least -1585992.586 ms long)
> underrun!!! (at least -1585992.586 ms long)
> underrun!!! (at least -1585992.586 ms long)
> underrun!!! (at least -1585992.586 ms long)
>
> If I revert this commit, then I am able to play it well again.

Ops, I replied in the wrong patch.

The one that breaks imx6q-sabresd is:

   commit 48e1c2255 "ARM: clk-imx6q: refine clock tree for SSI"
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