Hello,

I want to understand the functioning of muteGpio that occur in resource platform.

Thank you

Don't know what is it exactly for but I know to find them :

VREF (50/80/100) -> Hex (32,50,64) + 0100 + NID (hex) -> Converted du dec

Get the VREF from the codec dump, for some device, with VREF _HIZ, MUTEGPIO is 0

example :

Node 0x18 [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
Pin-ctls: 0x24: IN VREF_80
-> 0x50010018 -> 1342242840
Node 0x19 [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
Pin-ctls: 0x24: IN VREF_80
-> 0x50010019 -> 1342242841
Node 0x1a [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
Pin-ctls: 0x20: IN VREF_HIZ
-> O
Node 0x1b [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
Pin-ctls: 0x40: OUT VREF_HIZ
-> O

Interesting

some findings here.....not only for mutegpio

chech out for pic_ctrl ...if VREF is the same then nodes are "group in" the same amp

this way 5.1 works out-of-the-box and HP detect mutes ...hehe

ex.
say that you have group 40 41 and 42 for LineOUTs (5.1) ...and vref _HIZ for HP and Green lineOUT (meens 0).
place MUTEGPIO=0 for both and group them to one amp-mixer node
when you plug the HP the VREF (Voltage reference) goes to 0Volt and mutes this amp-mixer..
anything connected to that amp-mixer is mutes...
nice eeeeeee?