Hello everyone
In the IMX7DRM manual, there is a description of the LCDIFx_AS_CTRL register on page 4286. In the description of bits 19-16 of the LCDIFx_AS_CTRL register, there is some understanding of the description.
MASKAS = 0x0 AS AND PS
MASKNOTAS = 0x1 nAS AND PS
MASKASNOT = 0x2 AS AND nPS
MERGEAS = 0x3 AS OR PS
MERGENOTAS = 0x4 nAS OR PS
MERGEASNOT = 0x5 AS OR nPS
NOTCOPYAS = 0x6 nAS
NOT = 0x7 nPS
NOTMASKAS = 0x8 AS NAND PS
NOTMERGEAS = 0x9 AS NOR PS
XORAS = 0xA AS XOR PS
NOTXORAS = 0xB AS XNOR PS
In the above description: What is AS? What is PS? What is nAS? What is nPS?
What will be the effect of AS, PS, AND, nAS, OR, XNOR?
Hi 其东 刘
>What is AS?,What is PS?
AS is Alpha Surface, PS is single processed surface as described on page 4603.
"nAS" seems inverted AS.
some alpha examples can be found in
pxp_v4l2_test.c\pxp_v4l2_test\test - imx-test - i.MX Driver Test Application Software
Best regards
igor
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