Hi,
This series fixes two independent Nouveau regressions affecting VDPAU
hardware video decoding on NVIDIA GK107 (Kepler).
Patch 1 fixes engine context mappings for the legacy MSVLD, MSPDEC and
MSPPP video engines. Since commit 8ab849d6dd4c
("drm/nouveau/fifo: add new engine context handling"), privileged engine
context mappings cause FIFO PRIV_VIOLATION faults and kill the channel
during VDPAU decoding on GK107.
Patch 2 fixes a fence/progress hang introduced by commit 55e1a5996085
("drm/nouveau/fifo/ga100-: add per-runlist nonstall intr handling").
Legacy FIFO implementations use a single global nonstall event at
index 0, while channel event registration was changed to use runl->id
unconditionally. This can leave fence completion waiting for an event
that is never signalled.
Tested on NVIDIA GK107 with a Linux 7.3-rc2 based drm-misc tree,
Mesa 25.0.7 and mpv using VDPAU_DRIVER=nouveau and vdpau-copy.
With both patches applied:
H.264 1920x1080: PASS
MPEG-2 1920x1080: PASS
VC-1 Advanced Profile: PASS
All three tests completed using VDPAU hardware decoding. No Nouveau
faults were reported in dmesg.
Thanks,
Risto
Risto Pajula (2):
drm/nouveau/fifo/gk104: fix legacy video engine context mappings
drm/nouveau/fifo: use global nonstall event on legacy FIFO
drivers/gpu/drm/nouveau/nvkm/engine/fifo/gk104.c | 14 ++++++++++++++
drivers/gpu/drm/nouveau/nvkm/engine/fifo/uchan.c | 3 ++-
2 files changed, 16 insertions(+), 1 deletion(-)
--
2.47.3
