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mesa/src/broadcom/drm-shim/README.md
Eric Anholt 82bf1979d7 v3d: Introduce a DRM shim for calling out to the simulator. 
The goal is to enable testing of parts of drivers without depending on any
particular kernel version or hardware being present.

Simply set LD_PRELOAD=$PREFIX/lib/libv3d_drm_shim.so in your environment,
and we'll fake a /dev/dri/renderD128 (or whatever the next available node
is) using v3dv3.  That node can then be used with the surfaceless or gbm
EGL platforms.

Acked-by: Iago Toral Quiroga <itoral@igalia.com>
2019-07-25 08:56:19 -07:00

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v3d backend

This implements some of v3d using the closed source v3dv3 tree's C/C++-based simulator. All execution is synchronous.

Export: MESA_LOADER_DRIVER_OVERRIDE=v3d LD_PRELOAD=$prefix/lib/libv3d_drm_shim.so. The v3dv3 version exposed will depend on the v3dv3 build -- 3.3, 4.1, and 4.2 are supported.

v3d_noop backend

This implements the minimum of v3d in order to make shader-db work. The submit ioctl is stubbed out to not execute anything.

Export MESA_LOADER_DRIVER_OVERRIDE=v3d LD_PRELOAD=$prefix/lib/libv3d_noop_drm_shim.so. This will be a V3D 4.2 device.