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Internal Modules
250
SPRUHI7A – December 2012 – Revised June 2016
Copyright © 2012–2016, Texas Instruments Incorporated
High-Definition Video Processing Subsystem (HDVPSS)
1.2.13.3.3.3.4 Sync on Channel
A Sync on Channel descriptor stalls the list until the channel specified is free. If the channel is already free
then the descriptor will not cause the list to stall. Word 0, Word 1 and Word 2 are reserved.
Table 1-94. Sync on Channel Field Descriptions (Word - 3)
Bits
Name
Description
31-27
Packet Type
Host Packet Descriptor Type = Ch
26-24
Reserved
Reserved
23-16
Source
Specifies the source used for the control
event.
15-4
Reserved
Reserved for future use
3-0
Control
Control type = 4h
1.2.13.3.3.3.5 Change Client Interrupt
A Change Channel Interrupt Source descriptor uses the source field to select a channel to modify the
attached clients interrupt generation event. The list will not stall on this descriptor. The format of the fields
is identical to the Sync on Client Descriptor. Word 0 is reserved.
Table 1-95. Change Client Interrupt 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.
Table 1-96. Change Client Interrupt Field Descriptions (Word - 2)
Bits
Name
Description
31-4
Reserved
Reserved
3-0
Event
Specify the event which should trigger the
client interrupt.
Table 1-97. Change Client Interrupt Field Descriptions (Word - 3)
Bits
Name
Description
31-27
Packet Type
Host Packet Descriptor Type = Ch
26-24
Reserved
Reserved
23-16
Source
Specifies the source used for the control
event.
15-4
Reserved
Reserved for future use
3-0
Control
Control type = 5h
1.2.13.3.3.3.6 Send Interrupt
A Send Interrupt descriptor will cause the VPDMA to generate an interrupt on the list manager controlled
interrupts as specified by the Source Field. The list will not stall on this descriptor. For example if source is
0 then vpdma_descriptor_interrupt0 will fire. If source is 12 then vpdma_descriptor_interrupt12 will fire.
Word 0, Word 1 and Word 2 are reserved.