[Sound-open-firmware] [RFC PATCH 4/5] topology: sof: add pipeline loopback dai

[Keyon Jie]

On 2018年05月30日 17:51, Xiuli Pan wrote:
> From: Pan Xiuli <xiuli.pan at linux.intel.com>
> 
> Add a switch widget for playback dai as the loopback dai.
> The switch will control the software dai loopback.

This should belong to a DAI, not pipeline, we should add LBM switch for 
each dai(or actually SSP), not for specific playback or capture pipelines.

Thanks,
~Keyon

> 
> Signed-off-by: Pan Xiuli <xiuli.pan at linux.intel.com>
> ---
>   topology/sof/pipe-dai-loopback.m4 | 36 ++++++++++++++++++++++++++++++++++++
>   1 file changed, 36 insertions(+)
>   create mode 100644 topology/sof/pipe-dai-loopback.m4
> 
> diff --git a/topology/sof/pipe-dai-loopback.m4 b/topology/sof/pipe-dai-loopback.m4
> new file mode 100644
> index 0000000..e62f6b0
> --- /dev/null
> +++ b/topology/sof/pipe-dai-loopback.m4
> @@ -0,0 +1,36 @@
> +# DAI Playback connector
> +
> +# Include topology builder
> +include(`utils.m4')
> +include(`dai.m4')
> +include(`pipeline.m4')
> +include(`mixercontrol.m4')
> +include(`switch.m4')
> +
> +#
> +# DAI definitions
> +#
> +C_CONTROLMIXER(Loop Back Switch, PIPELINE_ID,
> +	CONTROLMIXER_OPS(volsw, 256 binds the mixer control to volume get/put handlers, volsw, volsw),
> +	CONTROLMIXER_MIN(, 0),
> +	CONTROLMIXER_MAX(, 1),
> +	false,
> +	,
> +	Channel register and shift for Front Left/Right,
> +	LIST(`	', KCONTROL_CHANNEL(FL, 2, 0), KCONTROL_CHANNEL(FR, 2, 1)))
> +
> +W_DAI_OUT(DAI_TYPE, DAI_INDEX, DAI_BE, DAI_FORMAT, 0, 2, 2, dai0p_plat_conf)
> +W_SWITCH(LoopBack, DAI_FORMAT, 1, 1, 1, LIST(`               ', "Loop Back Switch PIPELINE_ID"))
> +
> +#
> +# DAI pipeline - always use 0 for DAIs
> +#
> +W_PIPELINE(N_DAI_OUT, SCHEDULE_DEADLINE, SCHEDULE_PRIORITY, SCHEDULE_FRAMES, SCHEDULE_CORE, 0, pipe_dai_schedule_plat)
> +
> +#
> +# Graph connections to pipelines
> +
> +P_GRAPH(DAI_NAME, PIPELINE_ID,
> +	LIST(`		',
> +	`kdapm(N_SWITCH(LoopBack), Loop Back Switch PIPELINE_ID, DAI_BUF)',
> +	`dapm(N_DAI_OUT, N_SWITCH(LoopBack))'))
>