[alsa-devel] [PATCH v2] ASoC: rt5663: Add the function of impedance sensing

[Mark Brown]

On Fri, Sep 15, 2017 at 02:20:09AM +0000, Oder Chiou wrote:

> Sorry for my poor explanation.

That's OK.

> The impedance table should like the following setting in the DTS.
> 		<   0    300  7  0xffd160  0xffd1c0  0xff8a10  0xff8ab0
> 		  301  65535  4  0xffe470  0xffe470  0xffb8e0  0xffb8e0>
> The first and second column are defined for the impedance range. If the
> detected impedance value is in the range, then the volume value of the third
> column will be set to codec. In our codec design, each volume value should
> compensate different DC offset to avoid the pop sound, and it is also
> different between headphone and headset. In the example, the
> "realtek,impedance_sensing_num" is 2. It means that there are 2 ranges of
> impedance in the impedance sensing function, and it also can be defined the
> device whether can support this function or not.

This stuff looks fairly good, can you put it in the binding document
please?
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 488 bytes
Desc: not available
URL: <http://mailman.alsa-project.org/pipermail/alsa-devel/attachments/20170915/6bfd4c7d/attachment.sig>