Closed lone-boy closed 1 year ago
Hello, I want to use udmabuf for dma like function. The ddr on the PL side allocates a section of space, the PL writes data into it, and then the PS section reads it. But when I write device tree like this reserved-memory {
#size-cells = <2>; ranges; image_buf0: image_buf@0 { compatible = "shared-dma-pool"; reusable; reg = <0x0 0x32000000 0x0 0x33000000>; alignment = <0x0 0x1000>; label = "image_buf0"; }; }; udmabuf@0{ compatible = "ikwzm,u-dma-buf"; device-name = "udmabuf0"; size = <0x01000000>; memory-region = <&image_buf0>; };
dmesg | grep udma u-dma-buf udmabuf@0: of_reserved_mem_device_init failed. return=-22 u-dma-buf udmabuf@0: driver probe failed. return=-22 u-dma-buf: probe of udmabuf@0 failed with error -22
Thanks for the issue.
I assume reserved-memory initialization has failed, please check dmesg.
Please see issue #45.
That's really nice, thank you very much
Hello, I want to use udmabuf for dma like function. The ddr on the PL side allocates a section of space, the PL writes data into it, and then the PS section reads it. But when I write device tree like this reserved-memory {
address-cells = <2>;
dmesg | grep udma u-dma-buf udmabuf@0: of_reserved_mem_device_init failed. return=-22 u-dma-buf udmabuf@0: driver probe failed. return=-22 u-dma-buf: probe of udmabuf@0 failed with error -22