The purpose of this page is to describe the Linux V4L2 driver for Xilinx Chroma resampler(CRESAMPLE) soft IP. NOTE: This IP has been superseded by the Video Processing Subsystem and users should look at the Xilinx V4L2 VPSS Scaler driver and Xilinx V4L2 VPSS CSC driver pages for the latest driver information.
The Linux CRESAMPLE driver (xilinx-cresample.c) based on the V4L2 framework creates a subdev node(/dev/v4l-subdev*) which can be used to configure the CRESAMPLE IP core. The general description of V4L2 framework is documented here, v4l2-framework.txt.
Linux Kernel defconfig
CONFIG_VIDEO_XILINX_CRESAMPLE and CONFIG_VIDEO_XILINX should be enabled.
Device tree binding
The dts node should be defined with correct hardware configuration. How to define the node is documented here, xlnx,axi-cresample.txt.
Following CRESAMPLE features are supported including:
Converting YUV444 / YUV422 / YUV420 into YUV422 / YUV420 format using predefined coefficients