Hi Kever,
On 11/7/24 4:35 AM, Kever Yang wrote:
Hi Quentin,
On 2024/11/6 01:21, Quentin Schulz wrote:
I am the unfortunate owner of an RK3399 Puma that is failing DRAM init every now and then with the following cryptic error message: """ pctl_start: Failed to init pctl channel 0 """
When it fails, the current logic is implemented in such a way that the board enters an infinite while loop. This is not ideal for embedded systems that are not easily accessible and also an issue when having devices in a CI lab for example.
It's fine for this patch to make the choice in panic to hang or to reset the system.
But I don't understand how this help you, does it may success to init the dram after
the reset in your case? I think in most case the board will keep reset because this is
more likely hardware issue and not able to became success after reset.
Exactly. After a reset (manual by pressing the reset button, or by panic()) the board works again. I don't have exact numbers for the probability for this to happen, but I had a board doing boot-into-Linux tests in a loop and it failed multiple times in the same day. Gut feeling is around ~10-20 times for ~2200 reboots.
I am NOT saying this is not related to a HW issue though, but I've been using that RK3399 Puma for a while, and sometimes I have this issue. The rest of the time it seems to "work fine" (haven't run memtest or extensive testing on that unit though).
I am NOT sure BUT I think applying https://github.com/rockchip-linux/u-boot/commit/e1652d3918b182e107addd5e6f45... on upstream U-Boot helped lower the probability (it still happened though!). Could be totally unrelated though and just flukes.
Cheers, Quentin