HI，
I am using imx8dx + 512M RAM,now the reserved-memory for cam gpu How to set the size.
original:
imx8dx-mek.dts file:
linux,cma {
compatible = "shared-dma-pool";
reusable;
size = <0 0x14000000>;
alloc-ranges = <0 0x98000000 0 0x14000000>;
linux,cma-default;
};
&imx8_gpu_ss {
reg = <0x80000000 0x40000000>, <0x0 0x08000000>;
reg-names = "phys_baseaddr", "contiguous_mem";
};
imx8x-mek.dtsi file:
reserved-memory {
#address-cells = <2>;
#size-cells = <2>;
ranges;
/*
* 0x8800_0000 ~ 0x8FFF_FFFF is reserved for M4
* Shouldn't be used at A core and Linux side.
*
*/
m4_reserved: m4@0x88000000 {
no-map;
reg = <0 0x88000000 0 0x8000000>;
};
rpmsg_reserved: rpmsg@0x90000000 {
no-map;
reg = <0 0x90200000 0 0x200000>;
};
decoder_boot: decoder-boot@84000000 {
reg = <0 0x84000000 0 0x2000000>;
no-map;
};
encoder_boot: encoder-boot@86000000 {
reg = <0 0x86000000 0 0x200000>;
no-map;
};
decoder_rpc: decoder-rpc@0x92000000 {
reg = <0 0x92000000 0 0x200000>;
no-map;
};
encoder_rpc: encoder-rpc@0x92200000 {
reg = <0 0x92200000 0 0x200000>;
no-map;
};
encoder_reserved: encoder_reserved@94400000 {
no-map;
reg = <0 0x94400000 0 0x800000>;
};
/* global autoconfigured region for contiguous allocations */
linux,cma {
compatible = "shared-dma-pool";
reusable;
size = <0 0x3c000000>;
alloc-ranges = <0 0x96000000 0 0x3c000000>;
linux,cma-default;
};
};
reserved-memory {
#address-cells = <2>;
#size-cells = <2>;
ranges;
vdev0vring0: vdev0vring0@90000000 {
compatible = "shared-dma-pool";
reg = <0 0x90000000 0 0x8000>;
no-map;
};
vdev0vring1: vdev0vring1@90008000 {
compatible = "shared-dma-pool";
reg = <0 0x90008000 0 0x8000>;
no-map;
};
vdev1vring0: vdev1vring0@90010000 {
compatible = "shared-dma-pool";
reg = <0 0x90010000 0 0x8000>;
no-map;
};
vdev1vring1: vdev1vring1@90018000 {
compatible = "shared-dma-pool";
reg = <0 0x90018000 0 0x8000>;
no-map;
};
vdevbuffer: vdevbuffer {
compatible = "shared-dma-pool";
reg = <0 0x90400000 0 0x100000>;
no-map;
};
};
thanks,
