6.18: PCIe GPU testing (AMD and Intel Xe)#7113
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Also just to keep the breadcrumbs going:
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Branch rebased to keep it relevant. I've just noted https://lore.kernel.org/dri-devel/20250613-upstream-xe-non-4k-v2-v2-0-934f82249f8a@aosc.io/ I don't see it having been merged, so at some point it would be useful to test it as the thread appears to have stalled. |
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Branch rebased. |
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I guess you don't want noise and user testing here. But just as a thumbs up, I've installed this kernel on a rpi5 with oculink-connected RX 6800 XT, and the combo seems rock-solid from a user perspective. I've run multiple games and benchmarks, as well as Jeffs llama examples both in chat- and in web-server mode. Not a single hickup. The card even seems to go into suspend mode and recovers on use. |
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With the old PR on 6.17.x, I was able to get the AI Pro R9700 working. With this PR on 6.18.x, I get: Maybe the AMD driver in 6.18 has a new thing where it forces a BAR resize, and that's currently failing? The only thing I could find that's remotely related is this patch. Or could be related to this post: [REGRESSION] amdgpu fails to load external RX 580 since PCI: Allow relaxed bridge window tail sizing. The RX 7900 XT is loading fine, however. |
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@pigong I haven't really the time to dig into these @geerlingguy There were other patches around for resizing the BAR and releasing the old allocation before creating the new one. I don't know if those would help in this situation. They seem to be referenced in #6621 |
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@6by9 - With a fresh rebuild of the entire OS, I was able to get the R9700 working again, not sure why it wasn't before... but that previous install was about a month old at this point, and I generally rebuild things weekly, oops :) It's nice to have just one or two commands to run, and not have to wait for a kernel recompile! |
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@6by9 - FYI @mariobalanica has a set of 5 patches for nouveau for Nvidia cards; I haven't had time to take a look yet, but something else interesting to note! https://github.com/mariobalanica/arm-pcie-gpu-patches/tree/nvidia-wip/linux/6.17 |
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Branch rebased to keep it vaguely current. I'd seen that mariobalanica had some patches before, but had registered them for NVidia's proprietary drivers and not nouveau. I'll grab those patches and see whether it works with my old GT710 (too old to be supported by the latest proprietary drivers - I did try). |
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Erm, I've just got kmstest producing a sensible output on a GT710! The framebuffer emulation is messed up - that's odd as XR24 (RGBX8888) works fine through kmstest. kmscube doesn't render correctly. It reports renderer "NV106", OpenGL ES 3.2, but flashes a vaguely recognisable variant of what kmscube should be producing as if the stride is wrong. Frame rate of 5.4fps @ 1080p, or 1.4fps @ 4k30. The kernel log has messages -22 being -EINVAL. That falls out from
There is a log line Start X and run Seeing as this PR is still being batted around, I've pushed those patches to the branch so others can give it a try without having to rebuild the kernel. |
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Well that puts the kibosh on using this particular card for labwc or other current window manager, same as the |
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Currently testing possible regressions on Southern Islands cards. With Coreforge's and my patched kernel the SI card I have (HD 7870) would run perfectly fine. |
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Understanding this is a WIP. But I have decided to try my hands at getting an Intel Arc Pro B50 working. Following Jeff's excellent guide: https://www.jeffgeerling.com/blog/2025/all-intel-gpus-run-on-raspberry-pi-and-risc-v/ I'm able to get display out and Performed the steps outlined here: https://www.jeffgeerling.com/blog/2025/resizeable-bar-support-on-raspberry-pi/ Also posted here with a couple more details: geerlingguy/raspberry-pi-pcie-devices#779 (comment) |
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Hi, I have been using a command from Jeff Geerling sudo rpi-update pulls/7113, this now returns 404. Please help I am losing my mind. |
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CI build artifacts are only kept for 90 days (the longest that Github allows). We're now passed that point, so they've been automatically deleted. |
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Various PCIe controllers on ARM64 platforms don't support cache snooping, which leads to numerous issues when attempting to use PCIe graphics cards. Switching ttm_prot_from_caching to return pgprot_dmacoherent for ttm_cached pages solves the issue, albeit with a performance hit. There is a second check in ttm_prot_from_caching that also needs updating. Signed-off-by: Yang Bo <bo.yang@smail.nju.edu.cn> Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Also includes SND_HDA_* modules for audio on AMD GPUs. Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Taken from https://github.com/chimera-linux/cports/blob/master/main/linux-stable/patches/xe-nonx86.patch Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Branch rebased, but I haven't retested. I've dropped the Nouveau patches from this PR as they really were hacking. They're on https://github.com/6by9/linux/tree/rpi-6.18.y-pcie-gpu-nouveau if anyone wants them. |
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Working on another project right now but I can pull these changes and test on my SI card again later this month (I do remember SI refused to boot with this patch set so I could have a PR coming in a few weeks) |
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Quick test on my 2GB RX460 is all working fine. My Intel A380 is enumerating and works with kmstest, but I haven't rebuilt Mesa with the Xe support enabled, so it won't work with labwc at present. kmscube drops back to llvmpipe so is incredibly slow. |
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PR to create CI artifacts supporting AMD and Intel Xe GPUs.