drm/nouveau: bring back blit subchannel for pre nv50 GPUs

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[ Upstream commit 835a65f517 ]

1ba6113a90a0 removed a lot of the kernel GPU channel, but method 0x128
was important as otherwise the GPU spams us with `CACHE_ERROR` messages.

We use the blit subchannel inside our vblank handling, so we should keep
at least this part.

v2: Only do it for NV11+ GPUs

Closes: https://gitlab.freedesktop.org/drm/nouveau/-/issues/201
Fixes: 4a16dd9d18 ("drm/nouveau/kms: switch to drm fbdev helpers")
Signed-off-by: Karol Herbst <kherbst@redhat.com>
Reviewed-by: Ben Skeggs <bskeggs@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230526091052.2169044-1-kherbst@redhat.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

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This commit is contained in:

Karol Herbst 2023-05-26 11:10:52 +02:00 • committed by Greg Kroah-Hartman

parent 20686cb5af

commit 5cd311d6a3

3 changed files with 19 additions and 3 deletions

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1

drivers/gpu/drm/nouveau/nouveau_chan.c

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drivers/gpu/drm/nouveau/nouveau_chan.h

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drivers/gpu/drm/nouveau/nouveau_drm.c

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