Hi Peter!
14.03.2016 17:47, Peter Ujfalusi пишет:
So the issue is that we have the DAPM switches controlling exactly the
same registers. I believe if you would set the gain in a way that bit0
is 1, then DAPM will think that the path is disconnected. Also if you
would set the gain and then mute and unmute the path you would have
lost the gain you wanted to have.. The only way I can think of
implementing these mixers is to have two sets of custom callbacks. one
set is to set/get the gain and the other is to set/get the
mute/disconnect on these. When the path is disconnected you should not
write the gain change to the chip, but cache it and if the path is
unmuted, you write the cached gain. When you mute the path you should
take the set gain first, cache it, then disconnect the path. For these
gains you should have DECLARE_TLV_DB_SCALE() and use SOC_SINGLE_TLV().
Make sure that the control name matches with the corresponding DAPM
widget's name so ALSA can match them correctly.
That's not clear for me. As I understand, I need to create
SOC_SINGLE_TLV() for each gain I would like to change, with the same
name as SOC_DAPM_SINGLE_AIC3x (for example "Line1L Switch" for Line1)
and make callbacks with cached gain values. Am I right?
May be the better sollution is to change SOC_DAPM_SINGLE_AIC3x on/off
switch to other type with switch and gain control together? So it could
have some connected states with different gains and disconnected state
(Something like volume/mute control).
Cheers, Tim
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