[alsa-devel] About iMX6SL AUDMUX (port 7) and SSI3

[Xuebing Wang]

On 02/25/2015 04:38 PM, Nicolin Chen wrote:
> On Wed, Feb 25, 2015 at 04:28:52PM +0800, Xuebing Wang wrote:
>> Thanks. As the mainline kernel supports I2S master mode, would you please
>> tell me which ASoC machine driver actually uses I2S master mode?
> fsl-asoc-card.c

Nicolin,

Thanks. I am trying routing aud3 to internal ssi2. Thus in my case: 
int_port = 2, ext_port = 3, right? Of course, there are int_port-- and 
ext_port --.

As I am using I2S master mode (ssi2 generates both bit clock and frame 
sync, thus (dai_fmt & MASK) == SND_SOC_DAIFMT_CBM_CFM. According to 
iMX6SL reference manual, should TFSEL (bits 30..27) of int_ptcr be 
IMX_AUDMUX_V2_PTCR_TFSEL(int_port) (note: int_port vs ext_port), rather 
than the current IMX_AUDMUX_V2_PTCR_TFSEL(ext_port) in file fsl-asoc-card.c?

Thanks again.


>> The reason I am asking is that I am using I2S master mode, I'd like to
>> reference that machine driver to configure audmux by function
>> imx_audmux_v2_configure_port().
> That driver is a general purpose driver for several CODECs supports.
> If you plan to get your machine driver upstream, you can try that
> one directly; Otherwise, you can extract the audmux configuration
> part for your own use.
>
> Nicolin
>
>

-- 
Xuebing