MLP Report

windows 7 Win7: UAA
Test - Win7
(System)
01/01/2014 Filter
3905
Contingencies
Issue Description:
Various Intel HDMI HD Audio codecs do not correctly
implement Encoded Packet Type.
The Intel HD Audio DCN 35-A, HDMI/High Bit Rate, repurposes
bits 0 and 1 of the Pin Widget Control verb to be the Encoded
Packet Type (for example, "native" or "high bit rate.) See
section 7.3.3.13 of the DCN for further information:
http://www.intel.com/standards/hdaudio/
The codec is expected to perform validation on EPT values set
in this fashion. From the DCN:
If the value written to this control does not correspond to a
supported value as defined in the Pin Capabilities parameter,
the control must either retain the previous value or take the
value of 00, which will select the default native audio packet
type.
windows 7
Win7: UAA
Test - Win7
(System)
03/31/2012
Filter
4119
Contingencies
Issue Description:
Specific codecs do not correctly support Input Enable
and Output Enable pin widget controls. This results in an
attempt to shut off the pin, and it doesn't shut off. The
Microsoft audio class driver has other ways of making
sure the pins don't make sound, which happen to work
for these specific codecs.
windows 7
Win7:Class
Driver AC3
Test - Win7
(System)
06/30/2025
1256
Erratum
Issue Description:
Run AC3 test on a system with the
Microsoft HD Audio
class driver installed. Expected results: All AC3 kernel
streaming Data
ranges should advertise
MinimumBitsPerSample = 16 and
MaximumBitsPerSample = 16.
Actual results:HD Audio class driver
sometimes advertises
MaximumBitsPerSample = 24.