Registers
875
SPRUHI7A – December 2012 – Revised June 2016
Copyright © 2012–2016, Texas Instruments Incorporated
High-Definition Video Processing Subsystem (HDVPSS)
1.3.13.2 VCOMP_reg1 Register (offset = 4h) [reset = 0h]
VCOMP_reg1 is shown in
and described in
Figure 1-551. VCOMP_reg1 Register
31
30
29
28
27
26
25
24
Reserved
CFG_MAIN_STARTU
P_HANDLING
Reserved
CFG_MAIN_SKIP_NUMPIX
R-0h
R/W-0h
R-0h
R/W-0h
23
22
21
20
19
18
17
16
CFG_MAIN_SKIP_NUMPIX
R/W-0h
15
14
13
12
11
10
9
8
Reserved
CFG_MAIN_USE_NUMPIX
R-0h
R/W-0h
7
6
5
4
3
2
1
0
CFG_MAIN_USE_NUMPIX
R/W-0h
LEGEND: R/W = Read/Write; R = Read only; W1toCl = Write 1 to clear bit;
-n
= value after reset
Table 1-468. VCOMP_reg1 Register Field Descriptions
Bit
Field
Type
Reset
Description
31
Reserved
R
0h
Reserved
30
CFG_MAIN_STARTUP_H
ANDLING
R/W
0h
0 = Default condition for video in/video out operation
1 = Set for video in/no video out
The Main source must be disabled when this bit is set. The NF and
pixel data to the downstream module is not sent. This mode forces
the VCOMP to request pictures from the upstream modules. Thus,
these modules (like the DEI) can go ahead and load up with one or
more input fields/frames before sending actual pictures to the output.
Alternately, the config reg can be set to '0' and the fixed_data_send
feature can send a color plane to downstream modules.
cfg_main_enable should be '0' when this bit is set. If both the Main
and the Aux are turned off, no nf or pixel data will propagate
downstream of the dss_vcomp.
29-28
Reserved
R
0h
Reserved
27-16
CFG_MAIN_SKIP_NUMPI
X
R/W
0h
Starting from the first pixel of each line. this field determines the
number of incoming pixels to discard as part of the Compositor's
picture clipping feature.
SKIP_NUMPIX should be even - For odd values, U and V will get
swapped in output. As a workaround to support odd values, swap
format may be used in the VPDMA descriptor to counteract this
problem.
15-12
Reserved
R
0h
Reserved
11-0
CFG_MAIN_USE_NUMPI
X
R/W
0h
After main_skip_numpix number of pixels, this field determiines the
number of pixels to use from each incoming line. This field allows the
input picture to be clipped.