ROC-rk3328-PC X11 acceleration.

[sbbg]

Hello, Gentoo gurus,

I'm running Gentoo at http://en.t-firefly.com/product/rocrk3328pc.html?theme=pc
But after successfully emerge x11, some problem arises.

Does anyone tweak the >5.2 kernel to fit into this board before?
Especially with panfrost driver enabled?

If not, I'm stucked with no acceleration of X11, because I built X11 with VIDEO_CARDS="panfrost"

If I want an accelerated X11 to run Kodi. Do you have any better idea?

Thank you.

=================================================================
What I learned so far:
1. There is no mainstream support in Linux kernel. While there are dts of rock64, evb, rk3328-roc-cc. I don't know which rk3328 dts can work for this board.
And I have hard time testing the image
2. I cannot find defconfig in upstream u-boot for this board.

With above problems, even I generated a compiled kernel and boot image. I cannot boot and test.
Please let me know any suggestion if you have more experience with this board.

[guitou]

Hello.

Looking at specs, you got ARM Mali-450 MP2 GPU.
And searching for drivers, it looks like you should use lima driver, not panfrost.

++
Gi)

[sbbg]

[sbbg]

After I enable VIDEO_CARDS="lima" and recompile mesa.

I did find a /usr/lib64/dri/lima_dri.so in rootfs.

But I wonder how to enable this?

I tried glmark2-es2 and glmark2 to test it.
They all display:

GL_VENDOR: VMWare, Inc.
GL_RENDERER: llvmpipe

And what's more, I can't find another option in result of "eselect opengl list"
It only display xorg-x11 as only implementation.

The only thing mentioned failed in Xorg.0.log is:
"modeset(0): glamor initlization failed."

How can I enable LIMA properly? Thank you.

[erm67]

It is not so easy, but first question, are you satisfied with their 4.4 kernel or you want mainline?

To fully enable opengl you need a kernel driver and a userspace library, if you use their kernel with the proprietary kernel drivers you will need to use their userspace library, if instead you are going to use mainline you will need to enable kernel config option DRM_LIMA that will work fine with mesa. I am a bit busy to search the links for the mesa part ATM, maybe during the weekend

To use mainline you only need mainline, this of course involves finding a functional dtb ...
Lima's kernel driver has been merged, and will be in Linux kernel v5.2, the mesa part has been merged already.

link to the proprietary off-tree drivers:

https://developer.arm.com/tools-and-software/graphics-and-gaming/mali-drivers/utgard-kernel

this drivers requires a binary blob that probably is already in the ubuntu image you downloaded from vendor and will probably let you use the dtb you already have.

Another option to use the old dtb is to download the off-tree utgard (lima) off-tree driver for kernel 4.4 and use it together with a recent mesa.
_________________
Ok boomer
True ignorance is not the absence of knowledge, but the refusal to acquire it.
Ab esse ad posse valet, a posse ad esse non valet consequentia

My fediverse account: @erm67@erm67.dynu.net

[erm67]

https://patchwork.kernel.org/patch/10147745/

It looks like a dtb has been added to mainline for your board in 2018
_________________
Ok boomer
True ignorance is not the absence of knowledge, but the refusal to acquire it.
Ab esse ad posse valet, a posse ad esse non valet consequentia

My fediverse account: @erm67@erm67.dynu.net

[sbbg]

[erm67]

[erm67]

I should not say that here but, if you can, try the kernel+initrd from fedora32, they are really supporting tons of aarch64 SBC in their kernel and is good (even if obviously bloated to support all the board). Their ISO boots only on the raspi ATM so you will have to grab kernel+initrd+kernel modures from the rootfs and create your own boot media. Try all the rockchip dtbs, maybe one will work.
_________________
Ok boomer
True ignorance is not the absence of knowledge, but the refusal to acquire it.
Ab esse ad posse valet, a posse ad esse non valet consequentia

My fediverse account: @erm67@erm67.dynu.net