[Sound-open-firmware] [PTACH RFC 0/5] Add switch widget for loopback

[Pan, Xiuli]

On 5/30/2018 21:06, Pierre-Louis Bossart wrote:
> On 5/30/18 4:51 AM, Xiuli Pan wrote:
>> From: Pan Xiuli <xiuli.pan at linux.intel.com>
>>
>> Have some clean up for the code may used.
>> Add some macros that are needed for the switch widget.
>> TODO: Have the useable get/put function for the kcontrol.
>>
>> Pan Xiuli (5):
>>    topology: mixer: Add CONTROLMIXER_MIN
>>    topology: utils: Add kdapm macro for route with kcontrol
>>    topology: m4: add switch widget
>>    topology: sof: add pipeline loopback dai
>>    topology: test: add loopback test topology
>
> What do you mean by "loopback"?
> a) enabling capture on SSP with hardware LBM (LoopBackMode) - 
> mirroring the playback data?
> b) enabling a capture-to-playback hostless pipeline - mirroring the 
> capture data?
I think the it should be the a). This will try to enable SSP driver 
loopback mode with a kcontrol.
Maybe we can try to make the b) also work.

Thanks
Xiuli
>
>
>>
>>   topology/m4/mixercontrol.m4               | 16 ++++--
>>   topology/m4/switch.m4                     | 46 +++++++++++++++
>>   topology/m4/utils.m4                      |  4 ++
>>   topology/sof/pipe-dai-loopback.m4         | 36 ++++++++++++
>>   topology/sof/pipe-low-latency-capture.m4  |  3 +-
>>   topology/sof/pipe-low-latency-playback.m4 |  2 +
>>   topology/sof/pipe-pcm-media.m4            |  1 +
>>   topology/sof/pipe-tone.m4                 |  2 +
>>   topology/sof/pipe-volume-capture.m4       |  1 +
>>   topology/sof/pipe-volume-playback.m4      |  1 +
>>   topology/test/test-loopback-ssp.m4        | 94 
>> +++++++++++++++++++++++++++++++
>>   topology/test/tplg-build.sh               |  2 +-
>>   12 files changed, 201 insertions(+), 7 deletions(-)
>>   create mode 100644 topology/m4/switch.m4
>>   create mode 100644 topology/sof/pipe-dai-loopback.m4
>>   create mode 100644 topology/test/test-loopback-ssp.m4
>>
>