VideoEngine driver based on A40i SDK
Ion driver based on Google Android Ion
Put ve folder file in drivers/staging/media/sunxi/cedar_ve
Add source include to drivers/staging/media/sunxi/Kconfig
# 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/cedar_ve/Kconfig"
endif
Add obj to drivers/staging/media/sunxi/Makefile
obj-$(CONFIG_VIDEO_SUNXI_CEDAR_VE) += cedar_ve/
Put ion folder file in drivers/staging/android/
Add source include to drivers/staging/Kconfig
source "drivers/staging/android/Kconfig"
Add obj to drivers/staging/Makefile
obj-$(CONFIG_ANDROID) += android/
Add obj to drivers/staging/android/Makefile
obj-$(CONFIG_VIDEO_SUNXI_CEDAR_ION) += ion/
Add source include to drivers/staging/android/Kconfig in the if ANDROID condition.
# SPDX-License-Identifier: GPL-2.0
menu "Android"
config ANDROID
bool "Android Drivers"
default y if ARCH_SUNXI
help
Enable support for various drivers needed on the Android platform
if ANDROID
config ASHMEM
bool "Enable the Anonymous Shared Memory Subsystem"
depends on SHMEM
help
The ashmem subsystem is a new shared memory allocator, similar to
POSIX SHM but with different behavior and sporting a simpler
file-based API.
It is, in theory, a good memory allocator for low-memory devices,
because it can discard shared memory units when under memory pressure.
source "drivers/staging/android/ion/Kconfig"
endif # if ANDROID
endmenu
Example for Allwinner H3
(NOTE: The "7" in the example represents CLK_PLL_VE because CLK_PLL_VE is not exported in sun8i-h3-ccu.h.)
(For different soc here CLK_PLL_VE number can be different. You must check it again by your self OR LINUX KERNEL MAY CRASH.)
(Example, for Allwinner A40i, it's "9" in ccu-sun8i-r40.h, not "7".)
/ {
reserved-memory {
#address-cells = <1>;
#size-cells = <1>;
ranges;
cma_pool: cma@4a000000 {
compatible = "shared-dma-pool";
size = <0x6000000>;
alloc-ranges = <0x4a000000 0x6000000>;
reusable;
linux,cma-default;
};
ion_carveout: vecarveout@50600000 {
compatible = "ion-region";
size = <0xFA00000>;
alloc-ranges = <0x50600000 0xFA00000>;
no-map;
};
};
ve: ve@1c0e000 {
compatible = "allwinner,sunxi-cedar-ve";
reg = <0x01c0e000 0x1000>,
<0x01c00000 0x10>,
<0x01c20000 0x800>;
clocks = <&ccu 7>, <&ccu CLK_VE>,
<&ccu CLK_DRAM_VE>, <&ccu CLK_BUS_VE>;
clock-names = "pll", "mod", "ram", "ahb";
resets = <&ccu RST_BUS_VE>;
interrupts = <GIC_SPI 58 IRQ_TYPE_LEVEL_HIGH>;
allwinner,sram = <&ve_sram 1>;
};
ion: ion {
compatible = "allwinner,sunxi-ion";
status = "disabled";
heap_carveout@0{
compatible = "allwinner,carveout";
heap-name = "carveout";
heap-id = <0x4>;
heap-base = <0x50600000>;
heap-size = <0xFA00000>;
heap-type = "ion_carveout";
memory-region = <&ion_carveout>;
};
};
}
Enable ion
&ion {
status = "okay";
};
Enable Driver in
> Device Drivers > Staging drivers > Android
[*] Android Drivers
<*> Allwinner CedarX Ion Driver
> Device Drivers > Staging drivers > Media staging drivers
[*] Allwinner sunXi family Video Devices
[M] Allwinner CedarX VideoEngine Driver
... and here we go.