Hello Jonathan and Kevar,

I also see this issue when switching between Rockchip ATF and Upstream ATF.

Versions: Rockchip DDR Blob - rk3399_ddr_800MHz_v1.30.bin Rockchip Miniloader - rk3399_miniloader_v1.30.bin Rockchip ATF - rk3399_bl31_v1.36.elf Upstream ATF - git://git.trustedfirmware.org/TF-A/trusted-firmware-a.git, git tag v2.8.0, with RK3399_BAUDRATE changed from 115200 to 1500000 in plat/rockchip/rk3399/rk3399_def.h U-Boot - git://git.denx.de/u-boot.git, git tag v2022.01

Results: Rockchip DDR Blob + Rockchip Miniloader + Rockchip ATF + U-Boot = DMA working dma-pl330 ff6d0000.dma-controller: Loaded driver for PL330 DMAC-241330 dma-pl330 ff6d0000.dma-controller: DBUFF-32x8bytes Num_Chans-6 Num_Peri-12 Num_Events-12 dma-pl330 ff6e0000.dma-controller: Loaded driver for PL330 DMAC-241330 dma-pl330 ff6e0000.dma-controller: DBUFF-128x8bytes Num_Chans-8 Num_Peri-20 Num_Events-16 Rockchip DDR Blob + Rockchip Miniloader + Upstream ATF + U-Boot = DMA not working OF: amba_device_add() failed (-19) for /bus/dma-controller@ff6d0000 OF: amba_device_add() failed (-19) for /bus/dma-controller@ff6e0000

I can't check the Rockchip ATF source code as it isn't available. Any idea what is different between Rockchip ATF and Upstream ATF for DMA to work properly?

@Kevar: It would be really great if you could have a look into it.

I am still having this issue.

Thanks -- Christoph