[alsa-devel] [PATCH 3/8] ASoC : dwc : add quirk for dwc controller instances

[Mark Brown]

On Thu, Oct 08, 2015 at 12:12:36PM -0400, Alex Deucher wrote:
> From: Maruthi Srinivas Bayyavarapu <Maruthi.Bayyavarapu at amd.com>
> 
> Added a qurik to assign different base addresses for different
> dwc controllers present on platform for playback and capture.

I don't understand what the above means, sorry.  Normally the address
ranges for devices are supplied via resources when the device is
registered.

> +	if (dev->quirks & DW_I2S_QUIRK_MULTI_DWC) {
> +		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
> +			i2s_write_reg(dev->i2s_pbase, CER, 0);
> +			i2s_write_reg(dev->i2s_pbase, IER, 0);
> +		} else {
> +			i2s_write_reg(dev->i2s_cbase, CER, 0);
> +			i2s_write_reg(dev->i2s_cbase, IER, 0);
> +		}

This looks like it might be part of the previous change to merge
separate playback and capture instances of the controller into one
device rather than a separate change?  But perhaps what this is saying
is also that the controller instances aren't actually totally separate
after all and the prior change maps well onto the hardware...
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