8935 scaler&wmixer driver

本文解析了TCC8935芯片中显示设备的数据处理流程,包括RDMA、VIQE/Deint、Scalar及Wmixer等组件的作用与连接方式,并详细介绍了各Scalar与Wmixer的具体配置。

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TCC8935 features 4 scalars and 6  wmixers within VIOC:

In case of a Display device back end, the typical route is:

        RDMA (2 GRDMA and/or 2 VRDMA) -> VIQE / Deint-S -> Scalar -> Wmixer 4-2 -> LCDC


SCALARS:

scalar 0:         max destination size 4096

scalar 1-3:     max destination size 2048

8935 BSP supports 3 scalars (0, 1, 2):

scalar 0,        "scaler", a platform device(10, 244), the driver is drivers/char/tcc_scaler0_drv.c

scalar 1,        "scaler1", a character device (201, 1), the driver is drivers/char/tcc_scaler1_drv.c

scalar 2,        "scaler2", a character device (202, 1), the driver is drivers/char/tcc_scaler2.c



Window Mixers (4 to 2):

wmixer 0:      "wmixer", a character device (210, 1), the driver is drivers/char/tcc_wmixer.c

wmixer 1:      "wmixer1", a character device (225, 1), the driver is drivers/char/tcc_wmixer1.c

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