graphics/mesa-dri: Enable lavapipe

[manu]

Summary

Lavapipe is a vulkan driver using llvm.
Useful for platform without native vulkan support.

To squash with 21.3.7 update

MFC: 2022Q1
PR: 257303
Sponsored by: Beckhoff Automation GmbH & Co. KG

Test Plan

Tested with vkcube on rockpro64 without panfrost driver.

[manu]

That doesn't seems to help vkcube on rockchip.
vkcube still enumerates the GPUs and fails here.
But maybe this will help on other platform (or maybe I've missed something)

[jbeich]

In D34371#778459, @manu wrote:

vkcube still enumerates the GPUs and fails here.

For vulkan-loader to find lavapipe it needs corresponding .json file under /usr/local/share/vulkan/icd.d/ that points to .so file.

https://wiki.archlinux.org/title/Vulkan#Software_Vulkan:_lavapipe
https://github.com/KhronosGroup/Vulkan-Loader/blob/master/docs/LoaderInterfaceArchitecture.md#table-of-debug-environment-variables

[manu]

Add the icd file for lavapipe

[jbeich]

In D34371#778459, @manu wrote:

That doesn't seems to help vkcube on rockchip.

Maybe add panfrost to -Dvulkan-drivers=<...>. See https://gitlab.freedesktop.org/mesa/mesa/-/commit/d970fe2e9d6a

[manu]

Really add the icd file

[manu]

In D34371#778468, @jbeich wrote:

In D34371#778459, @manu wrote:

vkcube still enumerates the GPUs and fails here.

For vulkan-loader to find lavapipe it needs corresponding .json file under /usr/local/share/vulkan/icd.d/ that points to .so file.

https://wiki.archlinux.org/title/Vulkan#Software_Vulkan:_lavapipe
https://github.com/KhronosGroup/Vulkan-Loader/blob/master/docs/LoaderInterfaceArchitecture.md#table-of-debug-environment-variables

Yeah thanks.

In D34371#778471, @jbeich wrote:

In D34371#778459, @manu wrote:

That doesn't seems to help vkcube on rockchip.

Maybe add panfrost to -Dvulkan-drivers=<...>. See https://gitlab.freedesktop.org/mesa/mesa/-/commit/d970fe2e9d6a

This will not help for boards without panfrost.
Also panfrost vulkan wasn't tested yet so I'll add the driver when we now it works.

[manu]

Commited with mesa update in 4ddf9ef51bfdbe55613a0f249d390094a3369177