it only test on those adi codecs ad198x which need 0.02 seconds for the
measured impedance value become steady
according the specification
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
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
for nid in codec.nodes:
node = codec.get_node(nid)
if WIDGET_TYPE_IDS[node.wtype] == 'PIN':
pd = " "
impedance = " "
if ((node.pincaps & 4) == 4):
if (node.pincaps & 2):
codec.rw(nid, VERBS['SET_PIN_SENSE'], 0)
time.sleep(0.02)
sense = codec.rw(nid, VERBS['GET_PIN_SENSE'], 0)
if (node.pincaps & 1):
impedance = "Imp=%d" % (sense & 0x7fffffff)
if (sense & 0x80000000):
pd = "PD=1"
else:
pd = "PD=0"
print "Pin 0x%.2x [%s] %s %s at %s (%s) %s : %s %s" % (nid,
node.jack_conn_name, node.jack_type_name, node.jack_location_name,
node.jack_location2_name, node.jack_color_name, node.defcfg_misc , pd,
impedance)
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https://bugs.launchpad.net/bugs/1284466
Title:
[Inspiron 1420, SigmaTel STAC9228, Speaker, Internal] No sound at all
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