nouveau: add command-line GSP-RM registry support

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Add the NVreg_RegistryDwords command line parameter, which allows
specifying additional registry keys to be sent to GSP-RM.  This
allows additional configuration, debugging, and experimentation
with GSP-RM, which uses these keys to alter its behavior.

Note that these keys are passed as-is to GSP-RM, and Nouveau does
not parse them.  This is in contrast to the Nvidia driver, which may
parse some of the keys to configure some functionality in concert with
GSP-RM.  Therefore, any keys which also require action by the driver
may not function correctly when passed by Nouveau.  Caveat emptor.

The name and format of NVreg_RegistryDwords is the same as used by
the Nvidia driver, to maintain compatibility.

Signed-off-by: Timur Tabi <ttabi@nvidia.com>
Signed-off-by: Danilo Krummrich <dakr@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240417215317.3490856-1-ttabi@nvidia.com

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Timur Tabi 2024-04-17 16:53:17 -05:00 • committed by Danilo Krummrich

parent 5284e4202a

commit b58a0bc904

2 changed files with 343 additions and 24 deletions

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6

drivers/gpu/drm/nouveau/include/nvkm/subdev/gsp.h

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363

drivers/gpu/drm/nouveau/nvkm/subdev/gsp/r535.c

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