Archlinuxarm 64-bit main line kernel vc4 graphics problem

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Archlinuxarm 64-bit main line kernel vc4 graphics problem

Postby mcanna » Wed Aug 10, 2022 7:07 am

Archlinuxarm wiki says that the main line kernel supports almost entirely vc4 graphics. But no matter what, if I use neofetch, it won't display vc4 graphics. The Linux main line kernel claimed to support Raspberry Pi 4b gpu as early as a year ago. I have no way to know whether my gpu really installs lspci and doesn't show it. Please tell me how to correctly install the gpu driver of Raspberry Pi 4b 64-bit main line kernel.
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Re: Archlinuxarm 64-bit main line kernel vc4 graphics proble

Postby graysky » Wed Aug 10, 2022 7:08 am

Try the linux-rpi kernel not mainline kernel.
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Re: Archlinuxarm 64-bit main line kernel vc4 graphics proble

Postby elgorro » Wed Aug 10, 2022 8:14 am

I've not tested neofetch or something, but for "my" apps is has certain limitations of "full vc4" capability and can result in errors. :roll: I'm wondering if the linux-rpi gets an update soon?
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Re: Archlinuxarm 64-bit main line kernel vc4 graphics proble

Postby fduncanh » Sun Oct 23, 2022 3:17 am

The mainline kernel is missing the required bcm2835_codec.ko module


hardware decoding of h264 video by the Pi's Broadcom GPU requires that a kernel module bcm2835_codec.ko is present. This is maintained by Raspberry Pi at https://github.com/raspberrypi/linux/tree/rpi-5.18.y/drivers/staging/vc04_services, but is not yet in the mainline Linux kernel (some other bcm2835 drivers already are there, maybe it will eventually be added), so it should have been added as a patch to kernels intended for the Raspberry Pi. This is done by Raspberry Pi OS, Ubuntu, and Manjaro distributions for the Pi.

It is absent in the archlinux image for R Pi.
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