#dri-devel on 2025-03-25 — irc logs at oftc.irclog.whitequark.org

2024-07-16 04:52 ChanServ changed the topic of #dri-devel to: <ajax> nothing involved with X should ever be unable to find a bar

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01:19 <ezzieyguywuf> I have compiled mesa locally per https://docs.mesa3d.org/meson.html#installation-location, and (attempted to) included llvmpipe per https://docs.mesa3d.org/drivers/llvmpipe.html#building . I'm unsure how to use this local llvmpipe though

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01:20 <ezzieyguywuf> I tried LD_LIBRARY_PATH=${PWD}/build/install/lib/x86_64-linux-gnu/ vulkaninfo but this still just shows my system-wide llvmpipe

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01:20 <ezzieyguywuf> I thought about using VK_DRIVER_FILES but I'm not sure which icd file is appropriate

01:21 <ezzieyguywuf> I tried VK_DRIVER_FILES=${PWD}/build/install/share/vulkan/icd.d/lvp_icd.x86_64.json but again this seems to return my system-wide llvmpipe

01:23 <airlied> run meson devenv

01:23 <airlied> that is the right json file for lavapipe

01:23 <airlied> maybe try VK_ICD_FILENAMES

01:24 <pendingchaos> "meson devenv -C builddir command" should work

01:24 <pendingchaos> lvp_icd.x86_64.json might have an absolute path to the shared object in the install directory, which would require running ninja install first

01:25 <ezzieyguywuf> also though I may be looking at the wrong part of vulkaninfo, I thought "GPU id : 0 (llvmpipe (LLVM 19.1.7, 256 bits))" meant "mesa 19.1.7" but I don't think that's right

01:26 <pendingchaos> no, that's the llvm version

01:26 <pendingchaos> search for "driverVersion" in the output

01:26 <ezzieyguywuf> b/c I also see " driverInfo = Mesa 25.1.0-devel (git-3c0e0c3d04) (LLVM 19.1.7)" elsewhere

01:27 <ezzieyguywuf> that's def newer than my system version

01:27 <ezzieyguywuf> > run meson devenv < do I still need to do this? what does this accomplish?

01:29 <pendingchaos> runs a command with the VK_DRIVER_FILES environment variables

01:29 <pendingchaos> it works for GL too and you might find it more convenient to use than the environment variables, with less typing and no ninja install step needed

01:29 <ezzieyguywuf> gotcha

01:32 <ezzieyguywuf> so I'm happy with how things look with this local build, is it possible to install it alongside my system-wide mesa? e.g. my specify --prefix to /usr/local or smthn?

01:38 <pendingchaos> for vulkan, it should pick that up without any env vars needed and both will be listed in vulkaninfo, but might order it before the system-wide mesa: https://github.com/KhronosGroup/Vulkan-Loader/blob/main/docs/LoaderDriverInterface.md#driver-discovery-on-linux

01:38 <pendingchaos> not sure how it works for other apis

01:40 <ezzieyguywuf> > but might order it before < this is fine, I want to add logic to my renderer anyways to pick the gpu/driver with the right features

01:40 <ezzieyguywuf> thanks for the help

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03:38 <tarceri> Anyone around to ack this? https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/34171

03:39 <tarceri> Its blocked a bunch of MRs from landing today already

03:42 <airlied> tarceri: rb sent

03:44 <tarceri> airlied: thanks

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08:07 <MrCooper> is HDR supposed to work via non-atomic KMS, specifically the Colorspace & HDR_OUTPUT_METADATA properties?

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09:30 <tzimmermann> javierm, no comments on the rest of the sysfb series?

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09:34 <javierm> tzimmermann: sorry, I couldn't finish but I plan to continue later today or tomorrow morning

09:34 <tzimmermann> ok

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09:57 <dj-death> alyssa: so just FYI, dynamically uniform is less strong that what the divergence analysis gives

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10:04 <glehmann> how?

10:06 <glehmann> I could only see that happening if you have invocations for different draws in one subgroup. If all invocations are from one subgroup, dynamically uniform values will always be not divergent

10:06 <tzimmermann> jfalempe, thanks for the ast review. the draw functions and the format helpers have common code for converting pixel formats. i have a few patches to share the per-pixel functions. i'll post em today or tomorrow

10:07 <glehmann> of course it's possible that divergence analysis can't prove that a value is not divergent, but for things like push constant loads you would typically solve that by forcing the array index to be uniform in the backend isel

10:09 <jfalempe> tzimmermann: ah thanks, I have this on my todo-list for quite some time ;)

10:09 <tzimmermann> it's just the start

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13:32 <lumag> jani, I'd like to push out https://lore.kernel.org/dri-devel/20250324-drm-rework-dpcd-access-v4-0-e80ff89593df@oss.qualcomm.com/. The CI on Xe doesn't show any issues and i915 seems to be unrelated. Are you okay with that?

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13:36 <alyssa> dj-death: uh?

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13:44 <jani> lumag: make it so

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