[alsa-devel] [PATCH] ASoC: bcm2835: Increase channels_max to 8

[Mark Brown]

On Thu, Feb 02, 2017 at 10:37:44AM +1100, Matt Flax wrote:

>  	switch (params_channels(params)) {
>  	case 2:
> +	case 8:
>  		format = BCM2835_I2S_CH1(format) | BCM2835_I2S_CH2(format);
>  		format |= BCM2835_I2S_CH1(BCM2835_I2S_CHPOS(ch1pos));
>  		format |= BCM2835_I2S_CH2(BCM2835_I2S_CHPOS(ch2pos));

I can't understand how this works.  We're programming the hardware in an
identical fashion for both channel counts, that means that what we're
sending will be indistinguishable from a garbled stereo stream.  How
does this produce working clocks or manage to sync up reliably with
external clocks?
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