PLMP Report

Operating
System
Failing
Test
Expire
Date
ID
Number
Filter
Number
Type
Error Description
Windows 7
Windows 7
64-bit
UAA
Test
7/01/2011
1466
2195
Erratum
Preview Filter - Keepalive on low power digital outputs
AUDIO-0062, effective June 1 2009, requires that any HD Audio
codec that advertises EPSS support comply with the Intel HD Audio
Low Power DCN.
The Low Power DCN, in turn, says that support for EPSS is mandatory
after July 1st 2011.
Note the sentence "KeepAlive Enable is mandatory after July 1st
2011, if EPSS is reported set to 1."
Windows 7
Windows 7
64-bit
UAA
Test
8/09/2010
1299
2365
Erratum
Preview filter - Jack Detect Override on digital pin widgets
The HD Audio configuration default register (7.3.3.31 in the HD Audio
specification) includes a "Jack Detect Override" flag that can be used
to indicate that although a pin widget would normally be capable of
jack detection, there is something about this particular system that
causes this to be impossible.
This was intended to be used, for example, for analog pin widgets
that are connected to RCA jacks, which do not allow for impedance
detection.
Some digital pin widgets are using the Presence Detect pin sense
response to indicate that a digital handshake has occured - indeed,
HDMI pins have entire DCNs built around this concept, and it applies
equally well to S/PDIF pins.
A digital converter that supports presence detection should be able
to do so in any system, so the "Jack Detect Override" concept should
not apply to digital pins.
Windows 7
Windows 7
64-bit
UAA
Test
8/09/2010
1198
2908
Erratum
Preview Filter - Reserved "Impedance" bits in Pin Sense response to
digital pin widgets
The original HD Audio 1.0 specification contains a notion of "presence
detect", using electrical impedance which was intended to apply only
to analog pins. However, the language of the specification was such
that it could be read to apply to digital pins as well - in particular, to
S/PDIF pins.
A DCN was released to extend the notion of presence detect to
digital pins - in particular, to HDMI pins. This repurposed one of the
impedance bits, which were thought to be unused in digital pins, to
mean "ELD valid."
The correct way for a S/PDIF pin to respond to a Pin Sense verb is to
set the highest bit (Presence Detect) to 1 or 0 corresponding to
whether a S/PDIF connection is active; set the ELD Valid bit to 0
(since there is no such thing as ELD for S/PDIF); and set the rest of
the bits, which are reserved for digital pins, to 0.
Windows 7
Windows 7
64-bit
UAA
Test
8/09/2010
1348
2927
Erratum
Preview Filter - ASP Channel Mapping
The Intel HD Audio DCN 34-A2, HDMI/Multichannel, defines a mapping
between digital converter channels and HDMI slots; see section
7.3.3.41 of the DCN. Much of the verbiage is generalized in DCN 36-A
to apply equally to DisplayPort slots. The latest versions of all DCNs
are posted on Intel's HD Audio standards page:
http://www.intel.com/standards/hdaudio/
The default mapping from digital converter channels to slots is
expected to be 0 --> 0, 1 --> 1, 2 --> ***3***, 3 --> ***2***, 4 --> 4, 5
--> 5, 6 --> 6, and 7 --> 7.
Issue Resolution
Update the hardware to default the converter-channel-to-HDMI-slot
mapping according to the specification.
When this Errata expires, the issue described will be considered a
valid failure.