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Internal Modules
248
SPRUHI7A – December 2012 – Revised June 2016
Copyright © 2012–2016, Texas Instruments Incorporated
High-Definition Video Processing Subsystem (HDVPSS)
1.2.13.3.3.2.1 Packet Type
Bits 31-27, this field indicates the type of descriptor and should be set 0xB for configuration descriptor.
1.2.13.3.3.2.2 Source
The source is combined with the control field to determine what the control descriptor should use as the
source for its synchronization event.
1.2.13.3.3.2.3 Control
The Control field defines the specific function of the descriptor. The table below lists the different control
descriptors.
1.2.13.3.3.3 Control Descriptor Types
Table 1-89. Control Descriptor Types Summary
Control Descriptor
Control Field Value
Description
Sync on Client
0
Wait for the client attached to the channel
specified to reach a certain event before
proceeding.
Sync on List
1h
Wait for another list(s) to reach its Sync
on List Descriptor
Sync on External Event
2h
Wait for a Register write to the
LIST_STAT_SYNC bit specified or for an
external event.
Sync on Channel
4h
Wait for the channel specified to complete
Change Client Interrupt
5h
Change the interrupt event for a client
interrupt but do not wait for the event to
occur.
Send Interrupt
6h
Generate an interrupt event on one of the
Control Descriptor Interrupts
Reload List
7h
Reload the list from the location and size
specified.
Abort Channel
8h
Abort the transfer in the channel specified.
Toggle LM Field
9h
Causes the internal field signal that can be
selected by each client to toggle. This can
be used so that a group of clients can all
start simultaneously and not be tied to one
of the specific output ports.
1.2.13.3.3.3.1 Sync on Client
A Sync on Client Control descriptor uses the source field to select a channel to modify the attached clients
interrupt generation event. After configuring the interrupt generation event the list will then stall until that
event has occurred. Word 0 and Word 2 are reserved.
Table 1-90. Sync on Client Field Descriptions (Word - 1)
Bits
Name
Description
31-16
PIXEL_COUNT
Specify the pixel position on a line
specified by LINE_COUNT where a pixel
based event would occur.
15-0
LINE_COUNT
Specify the line where a line based event
would trigger