drm/nouveau/devinit/gf100-: detect if BIOS invoked devinit

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It is not advisable to perform devinit if it has already been done.
VBIOS will very likely have invoked devinit if the GPU is the primary
graphics device, but there is no accurate way to detect this fact yet.

This patch adds such a method for gf100 and later chips, by means of the
NV_PTOP_SCRATCH1_DEVINIT_COMPLETED bit. This bit is set to 1 by devinit,
and reset to 0 when the GPU is powered.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

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This commit is contained in:

Alexandre Courbot 2016-02-11 11:10:04 +09:00 • committed by Ben Skeggs

parent 8fb1240a71

commit a6a0f67ca7

4 changed files with 16 additions and 3 deletions

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14

drivers/gpu/drm/nouveau/nvkm/subdev/devinit/gf100.c

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2

drivers/gpu/drm/nouveau/nvkm/subdev/devinit/gm107.c

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2

drivers/gpu/drm/nouveau/nvkm/subdev/devinit/gm200.c

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1

drivers/gpu/drm/nouveau/nvkm/subdev/devinit/nv50.h

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