src/broadcom/drm-shim/README.md

   1 ### v3d backend
   2
   3 This implements some of v3d using the closed source v3dv3 tree's
   4 C/C++-based simulator.  All execution is synchronous.
   5
   6 Export: `MESA_LOADER_DRIVER_OVERRIDE=v3d
   7 LD_PRELOAD=$prefix/lib/libv3d_drm_shim.so`.  The v3dv3 version exposed
   8 will depend on the v3dv3 build -- 3.3, 4.1, and 4.2 are supported.
   9
  10 ### v3d_noop backend
  11
  12 This implements the minimum of v3d in order to make shader-db work.
  13 The submit ioctl is stubbed out to not execute anything.
  14
  15 Export `MESA_LOADER_DRIVER_OVERRIDE=v3d
  16 LD_PRELOAD=$prefix/lib/libv3d_noop_drm_shim.so`.  This will be a V3D
  17 4.2 device.