From: "eshe168@gmail•com" <eshe168@gmail•com>
To: timur <timur@tabi•org>
Cc: linuxppc-dev <linuxppc-dev@lists•ozlabs.org>,
zhphsearch <zhphsearch@163•com>
Subject: Re: Re: P1022 audio driver help!
Date: Mon, 2 Jun 2014 22:05:36 +0800 [thread overview]
Message-ID: <201406022205351271662@gmail.com> (raw)
In-Reply-To: 5388A851.2010508@tabi.org
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Hi Timur
thanks for your repons.
I have another question. Did you test full duplex in P1022 RDK board?Our design is same with P1022 RDK.
B.R.杨小帅
From: Timur TabiDate: 2014-05-30 23:48To: eshe168CC: linuxppc-dev; zhphsearchSubject: Re: P1022 audio driver help!On 05/30/2014 01:03 AM, eshe168 wrote:
> @timur
> hi,
> Audio card (wm8776) cannot work in full duplex, CPU is FSL P1022.
> The PCB design about audio card reference FSL P1022 development board,
> and palying or recording is OK separately.
> My question is whether P1022 audio driver cannot support full duplex?
I was never able to get the P1022ds audio to work in full duplex. After
trying for a few weeks, I just gave up.
If you look inside fsl_ssi.c (the main driver) you'll see this comment I
wrote:
/*
* FIXME: The documentation says that SxCCR[WL] should not be
* modified while the SSI is enabled. The only time this can
* happen is if we're trying to do simultaneous playback and
* capture in asynchronous mode. Unfortunately, I have been enable
* to get that to work at all on the P1022DS. Therefore, we don't
* bother to disable/enable the SSI when setting SxCCR[WL], because
* the SSI will stop anyway. Maybe one day, this will get fixed.
*/
(it should say "I have been unable" instead of "I have been enable")
Full duplex works fine on the MPC8610, which has the same audio
controller as the P1022, so I know the controller is physically capable
of it. I just don't know why it doesn't work on the P1022DS. I also
don't know if it's a problem with the P1022DS board or with the P1022
SOC itself.
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next prev parent reply other threads:[~2014-06-02 14:05 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-30 6:03 P1022 audio driver help! eshe168
2014-05-30 15:48 ` Timur Tabi
2014-06-02 14:05 ` eshe168 [this message]
2014-06-02 15:52 ` Timur Tabi
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