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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