7.3.3.15 Pin Sense The Pin Sense control returns the Presence Detect status, EDID-Like Data (ELD) Valid, and the impedance measurement of the device attached to the pin. Some codecs may require that the impedance measurement be triggered by software; in that case, sending the Execute command will cause the impedance measurement to begin. The “Presence Detect” bit will always be accurate if that functionality is supported by the widget. Note that the Pin Complex Widget may support the generation of an Unsolicited Response to indicate that the Sense Measurement (either the Presence Detect or the Impedance) value has changed, the generation of which implies that the measurement is complete.
Impedance returns the measured impedance of the widget. A returned value of 0x7FFF,FFFF (all 1‟s) indicates that a valid sense reading is not available, or the sense measurement is busy (refer to Section 7.3.1) if it has been recently triggered. This field is only valid if the widget has Sense capability as indicated by the “Impedance Sense Capable” bit of the Pin Capabilities parameter. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1540372 Title: [Intel DP35DP, SigmaTel STAC9271D, Green Speaker, Rear] Underruns, dropouts or crackling sound To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1540372/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
