topic Re: G2D on IMX 8MP in i.MX Processors

G2D on IMX 8MP

vaidesai — Tue, 17 Jun 2025 20:16:41 GMT

Hi folks,

I'm trying to use g2d_buf_from_virt_addr() to convert a user space allocation to g2d_buf. But I get this error spit out on call:

g2d_buf_from_virt_addr: NOT SUPPORTED

I'm using an i.MX 8MP with a 6.1.22 kernel (mickledore). Why is this API not supported? What are the quirks here?

If not supported what are the recommendations to wrap user space allocations to g2d_buf and use them with G2D APIs?

Re: G2D on IMX 8MP

Bio_TICFSL — Wed, 18 Jun 2025 14:49:01 GMT

Hello,

it seems we don't have g2d_buf_from_virt_addr function in kernel-module-imx-gpu-viv. You should try the latest BSP, but This shold be a problem with weston.

Regards

Re: G2D on IMX 8MP

vaidesai — Wed, 18 Jun 2025 18:21:44 GMT

Can you clarify what you mean by not having g2d_buf_from_virt_addr in gpu-viv kernel module? What does one need to do to build it in (say in an existing Yocto recipe)?

You're also saying retry latest BSP - this is not easily done without a major upgrade to a release. And why do you think this will fix the problem? Can you point to the source code/changes/patches that address this that makes you think it'll be fixed?

And what's weston got to do with this? How does weston affect a module's support?

Re: G2D on IMX 8MP

Bio_TICFSL — Thu, 19 Jun 2025 20:26:26 GMT

seems g2d failed to initialize, there are 2 suggestions here:

1. confirm the dpu driver and its g2d lib is ready to be used, like please check if the libg2d can be used sucessfully.

2. for hwc, try to swich 3D to do the comopistion to avoid the 2D issue.

regards