Radxa Cubie A7A/A7Z - Allwinner a733

[Nick A]

@Sand_Death I just updated my build with @alexc's BSP changes, which include the latest AIC8800 drivers. I'm building an image right now, so I haven't tested it yet.

I haven't tested Ethernet either. Maybe Alex can help you with that.  

Edited Friday at 07:24 PM by Nick A

[alexc]

My board is A7Z so unfortunately I couldn't fully test the Ethernet drivers.

Hi @qq20739111 / @humanus, any luck with the on board Ethernet?

 

FYI, my new version utilizes mainline MMC drivers as well. And I'm looking into PCIE at the moment. 

[alexc]

OK, it looks like the BSP PCIe driver might have some issues related to power management. I’m not entirely sure of the root cause yet, but when I connected an NVMe drive, it got extremely hot and failed to initialize properly.

The NVMe dmesg output suggested adding the following kernel parameters:

nvme_core.default_ps_max_latency_us=0 pcie_aspm=off

 

This resolved the NVMe issues on my side. I’ll try to dig deeper into the root cause, but @humanus please give it a try as well.

Edited Friday at 09:54 PM by alexc

[Marvin-03]

I tried to boot via EMMC using alexc's/Nick's BSP Kernel (6.18) and had a kernel panic: https://pastebin.com/aPhDfFzr

 

The crash occurs in thread T77 (a background worker) while it is attempting to scan for SD cards (mmc_rescan).

More specifically, the crash occurs when calling sd_uhs2_power_up, which is requested by mmc_attach_sd_uhs2. Here, the kernel is attempting to power up the power supply for the UHS-II SD card protocol.