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Internal Modules
238
SPRUHI7A – December 2012 – Revised June 2016
Copyright © 2012–2016, Texas Instruments Incorporated
High-Definition Video Processing Subsystem (HDVPSS)
Table 1-73. Data Packet Descriptor Word 0 Field Descriptions (continued)
Bit
Field
Value
Description
23
1D
0-1
The transfer is one dimensional. The transfer and frame sizes are combined to make a single 32-bit
transfer size. For writes this value is passed to the generated descriptor.
22-20
Even Line Skip
Field Value
0
+1 line
1h
+2 lines
2h-7h
Reserved
18-16
Odd Line Skip
Field Value
0
+1 line
1h
+2 lines
2h-7h
Reserved
15-0
Line Stride
0-
FFFFh
Address stride between lines in bytes
1.2.13.3.1.1.1 Data Type
Bits 31-26 indicate the type of data that is to be transferred. This value is used to compute the number of
bytes per pixel so that transactions may be made for the appropriate amount of data. The types of data
are dependent on the type of channel. The VPDMA descriptor data types RGB or YUV are defined
associated with the VPDMA channel assignment. This helps the engine to distinguish between the
overlapping values of the descriptor data types for RGB and YUV data. For more information about
VPDMA channels see
.
1.2.13.3.1.1.1.1 Miscellaneous Data Type
The Data Type selects the size in bits of the data for the Miscellaneous channel. The range is from 0 to 63
to represent the sizes from 1 to 64 bits.
MV and MVSTM clients for DEI and DEI_H use 4 bits for each pixel. Data type 3 needs to be selected for
this.
1.2.13.3.1.1.1.2 RGB Data Type
The most-significant bit selects if the data uses the CLUT table to generate the final RGB data. The data
in this case is used as an address to a 256 entry table that generates the final data. If the Bitmap used is
less then 8 bits then the lower bits of the data type are used to generate the upper address bits of the
lookup table. If the CLUT table is not used then
1.2.13.3.1.1.1.3 YUV Data Type
The Data Type for a YUV channel determines if the data channel is interleaved or color space separate. If
color spaced separate it is still assumed that the two chroma pixels are interleaved.
1.2.13.3.1.1.2 Notify
The Notify bit is used in conjunction with the Notify interrupts and when the channel has completed the
DMA transfer the Notify Interrupt for the list that contains the descriptor will fire. The last Notify bit set for a
specific list will be used so only a single Notify should be set in a list.
1.2.13.3.1.1.3 Field
The Field bit is the field value of the data that will be passed down to the clients. If the data is interlaced,
then this value should be cleared to 0.