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Display Subsystem Use Cases and Tips
gives the 40 coefficients to program the vertical downsampling (5-tap configuration).
Table 7-81. Down-Sampling Vertical Filter Coefficients (Five Taps)
Phases
VidFIRVC
22
()
VidFIRVC
2
()
VidFIRVC
1
()
VidFIRVC
0
()
VidFIRVC
00
()
0
0
36
56
36
0
1
4
40
55
31
-2
2
8
44
54
27
-5
3
-12
48
53
22
-7
4
-9
17
52
51
17
5
-7
22
53
48
12
6
-5
27
54
44
8
7
-2
31
55
40
4
gives the 40 coefficients to program the horizontal downsampling (5-tap configuration).
Table 7-82. Down-Sampling Horizontal Filter Coefficients (Five Taps)
Phases
VidFIRHC
4
()
VidFIRHC
3
(
VidFIRHC
2(
)
VidFIRHC
1(
)
VidFIRHC
0
()
)
0
0
36
56
36
0
1
4
40
55
31
-2
2
8
44
54
27
-5
3
-12
48
53
22
-7
4
-9
17
52
51
17
5
-7
22
53
48
12
6
-5
27
54
44
8
7
-2
31
55
40
4
The downsampling coefficients register configuration (vertical three taps and horizontal five taps) is the
following:
•
DSS.DISPC_VIDn_FIR_COEF_H0 = 0x24382400
•
DSS.DISPC_VIDn_FIR_COEF_HV0 = 0x24382400
•
DSS.DISPC_VIDn_FIR_COEF_H1 = 0x28371FFE
•
DSS.DISPC_VIDn_FIR_COEF_HV1 = 0x28391F04
•
DSS.DISPC_VIDn_FIR_COEF_H2 = 0x2C361BFB
•
DSS.DISPC_VIDn_FIR_COEF_HV2 = 0x2D381B08
•
DSS.DISPC_VIDn_FIR_COEF_H3 = 0x303516F9
•
DSS.DISPC_VIDn_FIR_COEF_HV3 = 0x3237170C
•
DSS.DISPC_VIDn_FIR_COEF_H4 = 0x11343311
•
DSS.DISPC_VIDn_FIR_COEF_HV4 = 0x123737F7
•
DSS.DISPC_VIDn_FIR_COEF_H5 = 0x1635300C
•
DSS.DISPC_VIDn_FIR_COEF_HV5 = 0x173732F9
•
DSS.DISPC_VIDn_FIR_COEF_H6 = 0x1B362C08
•
DSS.DISPC_VIDn_FIR_COEF_HV6 = 0x1B382DFB
•
DSS.DISPC_VIDn_FIR_COEF_H7 = 0x1F372804
•
DSS.DISPC_VIDn_FIR_COEF_HV7 = 0x1F3928FE
NOTE:
•
In this case, the DSS.
registers are not used.
•
In this case, the downsampling factor must be higher than 1/2.
The downsampling coefficients register configuration (both the vertical and the horizontal five taps) is the
following:
1787
SWPU177N – December 2009 – Revised November 2010
Display Subsystem
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