Direct Media Interface (DMI) RCRB
258 Datasheet
9.1 DMIVCECH—DMI Virtual Channel Enhanced
Capability
B/D/F/Type: 0/0/0/DMIBAR
Address Offset: 0–3h
Default Value: 04010002h
Access: RO
Size: 32 bits
This register indicates DMI Virtual Channel capabilities.
9.2 DMIPVCCAP1—DMI Port VC Capability Register 1
B/D/F/Type: 0/0/0/DMIBAR
Address Offset: 4–7h
Default Value: 00000001h
Access: RWO, RO
Size: 32 bits
This register describes the configuration of PCI Express Virtual Channels associated
with this port.
Bit Access
Default
Value
Description
31:20 RO 040h
Pointer to Next Capability (PNC): This field contains the offset to the next
PCI Express capability structure in the linked list of capabilities (Link Declaration
Capability).
19:16 RO 1h
PCI Express Virtual Channel Capability Version (PCIEVCCV): Hardwired
to 1 to indicate compliances with the 1.1 version of the PCI Express
specification.
Note: This version does not change for 2.0 compliance.
15:0 RO 0002h
Extended Capability ID (ECID): Value of 0002 h identifies this linked list item
(capability structure) as being for PCI Express Virtual Channel registers.
Bit Access
Default
Value
Description
31:7 RO 0000000h Reserved
6:4 RO 000b
Low Priority Extended VC Count (LPEVCC): Indicates the number of
(extended) Virtual Channels in addition to the default VC belonging to the low-
priority VC (LPVC) group that has the lowest priority with respect to other VC
resources in a strict-priority VC Arbitration.
The value of 0 in this field implies strict VC arbitration.
3 RO 0b Reserved
2:0 RWO 001b
Extended VC Count (EVCC): Indicates the number of (extended) Virtual
Channels in addition to the default VC supported by the device.
The Private Virtual Channel is not included in this count.
