Ok, I choose the way #1 without changing kcontrol names.
Another thing I don't understand is the way for caching gain volume if I
have switches muted. Is there any proper way for storing cached values
between gain and switch handlers includes soft reset or I need manually
check kcontrol name in handler and cache values in extended private
structure? The same question for switch handler, because I need to share
cached values between these handlers.
15.03.2016 15:40, Peter Ujfalusi пишет:
On 03/15/16 14:12, Timur Karaldin wrote:
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?
Mostly yes, but you need to name the controls:
existing switch + new gain control
"Line1L Switch" + "Line1L Volume"
"Line1R Switch" + "Line1R Volume"
In this way alsamixer can combine them.
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).
Something based on SOC_DAPM_SINGLE_TLV should work. But that means again
change in Kcontrol names.
--
С уважением,
Руководитель проектов
Морские комплексы и системы плюс
Каралдин Т.М.
----------------------------------------------------------------------------------
Best regards,
Projects director
Marine complexes and systems plus
Timur Karaldin
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