Panfrost d00c0000.gpu: Fatal error during GPU init

VIM2 Linux Kernel
1

Hi all,
Can someone running VIM2 with recent mainline linux kernel with panfrost config post output of
dmesg | grep panfrost
here is mine:

kvim2-gentoo ~ # cat /proc/version
Linux version 5.3.1 (root@kvim2-gentoo) (gcc version 9.2.0 (Gentoo 9.2.0 p1)) #2 SMP PREEMPT Fri Sep 27 21:45:31 CEST 2019

kvim2-gentoo ~ # zcat /proc/config.gz | grep -i panfrost
CONFIG_DRM_PANFROST=m

kvim2-gentoo ~ # dmesg | grep panfrost
[ 13.597976] panfrost d00c0000.gpu: clock rate = 666666666
[ 13.598073] panfrost d00c0000.gpu: mali-t820 id 0x820 major 0x1 minor 0x0 status 0x0
[ 13.598080] panfrost d00c0000.gpu: features: 00000000,101e76ff, issues: 00000000,24040400
[ 13.598088] panfrost d00c0000.gpu: Features: L2:0x07110206 Shader:0x00000000 Tiler:0x00000809 Mem:0x1 MMU:0x00002821 AS:0xff JS:0x7
[ 13.598093] panfrost d00c0000.gpu: shader_present=0x7 l2_present=0x1
[ 13.598180] panfrost d00c0000.gpu: GPU Fault 0x000000ad (UNKNOWN) at 0x33c299f2c0d9d62d
[ 13.598185] panfrost d00c0000.gpu: There were multiple GPU faults - some have not been reported
[ 13.605895] panfrost d00c0000.gpu: error powering up gpu
[ 13.622361] panfrost d00c0000.gpu: Fatal error during GPU init
[ 13.632411] panfrost: probe of d00c0000.gpu failed with error -12

clearly the GPU reports some faults.
I am curious to know if people see similar of same faults.

fwiw another box shows same except
[ 14.022634] panfrost d00c0000.gpu: GPU Fault 0x00000088 (UNKNOWN) at 0x000000e7e733c1c0
so I guess Fault and Address are somewhat random

Thanks

2

Panfrost will not init on S912 boards with a vanilla kernel. Do you have these patches applied?

https://github.com/chewitt/linux/commit/d0a03a1870329ebd76ab6affcfa3f103183ea771 and https://github.com/chewitt/linux/commit/5c46c60ef67f0d417ea29602e21f435b5da19a3e

Some proper fixes for the underlying issues are in process for future kernels.

3 Likes
3

thanks a lot!
I will apply the patches and let you know how things go.

update
panfrost does now init upon modprobe
and
/sys/devices/platform/soc/d0000000.apb/d00c0000.gpu/driver/module/drivers/platform:panfrost
appears

But the ‘GPU Fault 0x… (UNKNOWN) at 0x…’ is still there upon boot.
Looking at kernel code this may relate to request for irq to not succeed.

Also, Xorg now fails to start, and it logs:
(EE) No devices detected.

I understand this is work in progress.

Thanks for your contribution!

not sure if here is right place to discuss if it is common to all s912

4

^ I think the last few commits on that branch are the proposed longer-term fixes; I haven’t had much time to test anything recently so I’ve not tested them. Applications and usage will be user/device specific but from a panfrost perspective all S912 hardware is identical. I’ve never used panfrost for desktop tasks (only Kodi) so have no knowledge of other use cases.

1 Like
5

thanks for all pointers

6

Going from mainline kernel 5.3.1 to 5.4.0, panfrost does now init upon modprobe but he ‘GPU Fault 0x… (UNKNOWN) at 0x…’ is still there upon boot.

Moreover, as when I applied d0a03a1870329ebd76ab6affcfa3f103183ea771 and commit/5c46c60ef67f0d417ea29602e21f435b5da19a3e to 5.3.1, Xorg unfortunately fails to start …

Note that Xorg has always worked for me.

Of course, now that panfrost issues are ‘fixed’, maybe I need to configure something extra for making X find the drivers, but then: also note I did never configure anything to make Xorg work before.

Any hints?

Keep you informed.

7

I still have https://github.com/chewitt/linux/commit/f9c67a903da1cdc3e965c331ed83e2bbc131826a in my 5.4 branch. I’ve no idea about Xorg, but Kodi is up and running.

1 Like
8

I will try that patch.
It’s strange though how a just and only a kernel upgrade stops X11 from starting.
Have a nice day

9

Looks like I will have to follow some patch to make panfrost work on vim2 as I just tried without fbturbo drivers and it fails to load display manager. Whole panfrost is already present in the kernel.

I will check the above patch and compare it with the current kernel.

Thanks.

10

I have X11 working again and panfrost at least works perfect for sure with kmscube directly. X11 glxinfo also mentions ‘direct rendering’. Video upto HD seems to work. 4K is too slow to follow sound. There was one weird gotcha on my (gentoo) linux: X11 would probe card0 and try to display on card1 so I had to rename /dev/dri/card1 to e.g. /dev/dri/card1_ to make X11 display on probed card0.

1 Like
11

I tried your advice but that didn’t help. I have panfrost in lsmod but lightDM fails to load.

Also panfrost have nothing to do with video playback as video decoding is done by vpu and some of the video decoding format support is just accepted into mainline kernel. Do either you’re using custom kernel or its software decoding as s912 is quite powerful to process upto 1080p without any issue.

12

@Spikerguy
Is X11 not working (say with startx and twm)?
If so: what EE are present in Xorg.log.

13

FYI, i just posted a thread on Panfrost working with Debian buster