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linux/drivers/gpu/drm/nouveau/dispnv50
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Lyude Paul fa3cdf8d0b drm/nouveau: Reset MST branching unit before enabling 
When probing a new MST device, it's not safe to make any assumptions
about it's current state. While most well mannered MST hubs will just
disable the branching unit on hotplug disconnects, this isn't enough to
save us from various other scenarios that might have resulted in
something writing to the MST branching unit before we got control of it.
This could happen if a previous probe we tried failed, if we're booting
in kexec context and the hub is still in the state the last kernel put
it in, etc.

Luckily; there is no reason we can't just reset the branching unit
every time we enable a new topology. So, fix this by resetting it on
enabling new topologies to ensure that we always start off with a clean,
unmodified topology state on MST sinks.

This fixes occasional hard-lockups on my P50's laptop dock (e.g. AUX
times out all DPCD trasactions) observed after multiple docks, undocks,
and module reloads.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Cc: stable@vger.kernel.org
Cc: Karol Herbst <karolherbst@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2018-09-07 06:54:27 +10:00
..
atom.h drm/nouveau/kms/gv100: initial support 2018-05-18 15:01:46 +10:00
base507c.c drm/nouveau/kms/nv50-: separate blocklinear vs linear pitch 2018-05-18 15:01:30 +10:00
base827c.c drm/nouveau/kms/nv50-: separate blocklinear vs linear pitch 2018-05-18 15:01:30 +10:00
base907c.c drm/nouveau/kms/gk104-: add support for [XA]2R10G10B10 formats 2018-05-18 15:01:30 +10:00
base917c.c drm/nouveau/kms/gk104-: add support for [XA]2R10G10B10 formats 2018-05-18 15:01:30 +10:00
base.c drm/nouveau/kms/gk104-: add support for [XA]2R10G10B10 formats 2018-05-18 15:01:30 +10:00
base.h drm/nouveau/kms/nv50-: initial overlay support 2018-05-18 15:01:31 +10:00
core507d.c drm/nouveau/kms/nv50-: simplify tracking of channel interlocks 2018-05-18 15:01:29 +10:00
core827d.c drm/nouveau/kms/nv50-: split core implementation by hardware class 2018-05-18 15:01:28 +10:00
core907d.c drm/nouveau/kms/nv50-: split core implementation by hardware class 2018-05-18 15:01:28 +10:00
core917d.c drm/nouveau/kms/nv50-: split core implementation by hardware class 2018-05-18 15:01:28 +10:00
core.c drm/nouveau/kms/gv100: initial support 2018-05-18 15:01:46 +10:00
core.h drm/nouveau/kms/gv100: initial support 2018-05-18 15:01:46 +10:00
corec37d.c drm/nouveau/kms/gv100: initial support 2018-05-18 15:01:46 +10:00
curs507a.c drm/nouveau/kms/nv50-: cursors always use core channel vram ctxdma 2018-06-19 10:38:26 +10:00
curs907a.c drm/nouveau/kms/nv50-: simplify tracking of channel interlocks 2018-05-18 15:01:29 +10:00
curs.c drm/nouveau/kms/gv100: initial support 2018-05-18 15:01:46 +10:00
curs.h drm/nouveau/kms/gv100: initial support 2018-05-18 15:01:46 +10:00
cursc37a.c drm/nouveau/kms/gv100: initial support 2018-05-18 15:01:46 +10:00
dac507d.c drm/nouveau/kms/nv50-: split core implementation by hardware class 2018-05-18 15:01:28 +10:00
dac907d.c drm/nouveau/kms/nv50-: split core implementation by hardware class 2018-05-18 15:01:28 +10:00
disp.c drm/nouveau: Reset MST branching unit before enabling 2018-09-07 06:54:27 +10:00
disp.h drm/nouveau/kms/gv100: initial support 2018-05-18 15:01:46 +10:00
head507d.c drm/nouveau/kms/nv50-: initial overlay support 2018-05-18 15:01:31 +10:00
head827d.c drm/nouveau/kms/gk104-: support additional cursor sizes 2018-05-18 15:01:30 +10:00
head907d.c drm/nouveau/kms/nv50-: initial overlay support 2018-05-18 15:01:31 +10:00
head917d.c drm/nouveau/kms/gv100: initial support 2018-05-18 15:01:46 +10:00
head.c drm/nouveau/kms/gv100: initial support 2018-05-18 15:01:46 +10:00
head.h drm/nouveau/kms/gv100: initial support 2018-05-18 15:01:46 +10:00
headc37d.c drm/nouveau/kms/gv100: initial support 2018-05-18 15:01:46 +10:00
Kbuild drm/nouveau/kms/gv100: initial support 2018-05-18 15:01:46 +10:00
lut.c drm/nouveau/kms/nv50-: handle degamma LUT from window channels 2018-05-18 15:01:29 +10:00
lut.h drm/nouveau/kms/nv50-: handle degamma LUT from window channels 2018-05-18 15:01:29 +10:00
oimm507b.c drm/nouveau/kms/nv50-: initial overlay support 2018-05-18 15:01:31 +10:00
oimm.c drm/nouveau/kms/nv50-: split each resource type into their own source files 2018-05-18 15:01:28 +10:00
oimm.h drm/nouveau/kms/nv50-: split each resource type into their own source files 2018-05-18 15:01:28 +10:00
ovly507e.c drm/nouveau/kms/nv50-: initial overlay support 2018-05-18 15:01:31 +10:00
ovly827e.c drm/nouveau/kms/nv50-: initial overlay support 2018-05-18 15:01:31 +10:00
ovly907e.c drm/nouveau/kms/nv50-: initial overlay support 2018-05-18 15:01:31 +10:00
ovly917e.c drm/nouveau/kms/nv50-: initial overlay support 2018-05-18 15:01:31 +10:00
ovly.c drm/nouveau/kms/nv50-: initial overlay support 2018-05-18 15:01:31 +10:00
ovly.h drm/nouveau/kms/nv50-: initial overlay support 2018-05-18 15:01:31 +10:00
pior507d.c drm/nouveau/kms/nv50-: split core implementation by hardware class 2018-05-18 15:01:28 +10:00
sor507d.c drm/nouveau/kms/nv50-: split core implementation by hardware class 2018-05-18 15:01:28 +10:00
sor907d.c drm/nouveau/kms/nv50-: split core implementation by hardware class 2018-05-18 15:01:28 +10:00
sorc37d.c drm/nouveau/kms/gv100: initial support 2018-05-18 15:01:46 +10:00
wimm.c drm/nouveau/kms/gv100: initial support 2018-05-18 15:01:46 +10:00
wimm.h drm/nouveau/kms/gv100: initial support 2018-05-18 15:01:46 +10:00
wimmc37b.c drm/nouveau/kms/gv100: initial support 2018-05-18 15:01:46 +10:00
wndw.c drm/nouveau/kms/nv50-: remove duplicate assignment 2018-07-16 18:06:29 +10:00
wndw.h drm/nouveau/kms/gv100: initial support 2018-05-18 15:01:46 +10:00
wndwc37e.c drm/nouveau/kms/gv100: initial support 2018-05-18 15:01:46 +10:00