This is a note to let you know that I've just added the patch titled
drm/nouveau/mmu/nv4a: use nv04 mmu rather than the nv44 one
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-nouveau-mmu-nv4a-use-nv04-mmu-rather-than-the-nv44-one.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From f94773b9f5ecd1df7c88c2e921924dd41d2020cc Mon Sep 17 00:00:00 2001
From: Ilia Mirkin <imirkin@xxxxxxxxxxxx>
Date: Sat, 18 Mar 2017 16:23:10 -0400
Subject: drm/nouveau/mmu/nv4a: use nv04 mmu rather than the nv44 one
From: Ilia Mirkin <imirkin@xxxxxxxxxxxx>
commit f94773b9f5ecd1df7c88c2e921924dd41d2020cc upstream.
The NV4A (aka NV44A) is an oddity in the family. It only comes in AGP
and PCI varieties, rather than a core PCIE chip with a bridge for
AGP/PCI as necessary. As a result, it appears that the MMU is also
non-functional. For AGP cards, the vast majority of the NV4A lineup,
this worked out since we force AGP cards to use the nv04 mmu. However
for PCI variants, this did not work.
Switching to the NV04 MMU makes it work like a charm. Thanks to mwk for
the suggestion. This should be a no-op for NV4A AGP boards, as they were
using it already.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=70388
Signed-off-by: Ilia Mirkin <imirkin@xxxxxxxxxxxx>
Signed-off-by: Ben Skeggs <bskeggs@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/nouveau/nvkm/engine/device/base.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c
@@ -714,7 +714,7 @@ nv4a_chipset = {
.i2c = nv04_i2c_new,
.imem = nv40_instmem_new,
.mc = nv44_mc_new,
- .mmu = nv44_mmu_new,
+ .mmu = nv04_mmu_new,
.pci = nv40_pci_new,
.therm = nv40_therm_new,
.timer = nv41_timer_new,
Patches currently in stable-queue which might be from imirkin@xxxxxxxxxxxx are
queue-4.4/drm-nouveau-mpeg-mthd-returns-true-on-success-now.patch
queue-4.4/drm-nouveau-mmu-nv4a-use-nv04-mmu-rather-than-the-nv44-one.patch