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.

[alexc]

Hi @Marvin-03, could you try the latest build?

It looks like your board is still using the BSP MMC driver, but we migrated to the mainline MMC driver last week. That should at least resolve the issue you're currently seeing.

Also looking forward to your testing on the eMMC side, since the A7Z does not have eMMC support.