# Allwinner CedarX Driver for Mainline Linux 5.4
### VideoEngine driver based on Allwinner H6 Homlet BSP
### Ion driver based on Google Android Ion

## Install

Put all file in "drivers/staging/media/sunxi/cedar"

Add source to "drivers/staging/media/sunxi/Kconfig"
```
source "drivers/staging/media/sunxi/cedar/Kconfig"
```
Demo
```
# SPDX-License-Identifier: GPL-2.0
config VIDEO_SUNXI
	bool "Allwinner sunXi family Video Devices"
	depends on ARCH_SUNXI || COMPILE_TEST
	help
	  If you have an Allwinner SoC based on the sunXi family, say Y.

	  Note that this option doesn't include new drivers in the
	  kernel: saying N will just cause Kconfig to skip all the
	  questions about Allwinner media devices.

if VIDEO_SUNXI

source "drivers/staging/media/sunxi/cedrus/Kconfig"
source "drivers/staging/media/sunxi/cedar/Kconfig"

endif
```

Add obj to "drivers/staging/media/sunxi/Menuconfig"
```
obj-y += cedar/
```
Demo
```
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_VIDEO_SUNXI_CEDRUS)        += cedrus/
obj-y += cedar/
```

## DeviceTree
Demo for Allwinner V3 / V3s / S3L / S3
```
syscon: syscon@1c00000 {
    compatible = "allwinner,sun8i-v3s-system-controller", "allwinner,sun8i-h3-system-control", "syscon";
    reg = <0x01c00000 0xd0>;
    #address-cells = <1>;
    #size-cells = <1>;
    ranges;

    sram_c: sram@1d00000 {
        compatible = "mmio-sram";
        reg = <0x01d00000 0x80000>;
        #address-cells = <1>;
        #size-cells = <1>;
        ranges = <0 0x01d00000 0x80000>;

        ve_sram: sram-section@0 {
            compatible = "allwinner,sun8i-v3s-sram-c", "allwinner,sun4i-a10-sram-c1";
            reg = <0x000000 0x80000>;
        };
    };
};

cedarx: video-codec@1c0e000 {
    compatible = "allwinner,sun8i-v3-cedar";
    reg = <0x01c0e000 0x1000>;
    clocks = <&ccu CLK_BUS_VE>, <&ccu CLK_VE>, <&ccu CLK_DRAM_VE>;
    clock-names = "ahb", "mod", "ram";
    resets = <&ccu RST_BUS_VE>;
    interrupts = <GIC_SPI 58 IRQ_TYPE_LEVEL_HIGH>;
    allwinner,sram = <&ve_sram 1>;
    status = "disabled";
};
        
ion: ion {
    compatible = "allwinner,sunxi-ion";
    status = "disabled";
    heap_cma@0{
        compatible = "allwinner,cma";
        heap-name  = "cma";
        heap-id    = <0x4>;
        heap-base  = <0x0>;
        heap-size  = <0x0>;
        heap-type  = "ion_cma";
    };
};
```
## Compile
Enable Driver in 
```
Device Drivers > Staging drivers > Media staging drivers
[*]   Allwinner sunXi family Video Devices
<*>     Allwinner CedarX Video Engine Driver
<*>     Allwinner CedarX Ion Driver 
```
... and here we go.