topic IMX8M Mini GPU clock was 6KHz? in i.MX Processors

IMX8M Mini GPU clock was 6KHz?

Takashi_Kashiwagi — Mon, 14 Feb 2022 04:25:56 GMT

Hi Community!

I have using IMX8MM with kernel 4.19 and Qt Application. I'm investigating GPU because the drawing of Qt Application is slow.

Looking at various information on the GPU, the GPU clock was 6KHz, which was quite slow. Is this because the settings in the dtb file are incorrect?

root@imx8mm-var-dart:~# cat /sys/kernel/debug/gc/clk
gpu0 mc clock: 6105 HZ.
gpu0 sh clock: 6105 HZ.
gpu8 mc clock: 6107 HZ.
root@imx8mm-var-dart:~# cat /sys/kernel/debug/gc/info
gpu : 0
model : 600
revision : 4653
product : 70005
eco : 0
gpu : 8
model : 520
revision : 5341
product : 5202
eco : 0
cat: '[': No such file or directory
root@imx8mm-var-dart:~# cat /sys/kernel/debug/gc/meminfo
VIDEO MEMORY:
POOL SYSTEM:
Free : 107590126 B
Used : 26627602 B
MinFree : 106891650 B
MaxUsed : 27326078 B
Total : 134217728 B
POOL VIRTUAL:
Used : 24195072 B
MaxUsed : 24195072 B
root@imx8mm-var-dart:~# cat /sys/kernel/debug/gc/idle
On: 166,940,419,625 ns
Off: 36,154,787,625 ns
Idle: 0 ns
Suspend: 89,298,916,750 ns
root@imx8mm-var-dart:~#

Best Regards,

T.Kashiwagi

Re: IMX8M Mini GPU clock was 6KHz?

Bio_TICFSL — Tue, 15 Feb 2022 14:39:45 GMT

Hello Takashi San,

The BSP is wrong, the MX8MMini BSP is in:

https://www.nxp.com/design/software/embedded-software/i-mx-software/embedded-linux-for-i-mx-applications-processors:IMXLINUX

also please consult with variscite it looks like they do not enable the GPU.

Regards

Re: IMX8M Mini GPU clock was 6KHz?

Takashi_Kashiwagi — Wed, 16 Feb 2022 06:41:02 GMT

Hi Bio-san

Thank you for replying.

> also please consult with variscite it looks like they do not enable the GPU.

OK. I will contact variscite.

Best Regards,

T.Kashiwagi

Re: IMX8M Mini GPU clock was 6KHz?

Takashi_Kashiwagi — Thu, 17 Feb 2022 01:43:21 GMT

Hi @Bio_TICFSL san

As a result of various checks, I think that the GPU is working.
The score was 256 when I ran "glmark2-es2-wayland".
Also, the demo included in / opt / imx-gpu-sdk / GLES2 were worked.

"$ cat / sys / kernel / debug / gc / clk" doesn't seem to work.

Is it possible to get the GPU clock in other ways?

Best Regards,

T.Kashiwagi