Patch "drm/nouveau/bsp/g92: disable by default" has been added to the 4.4-stable tree

Patch "drm/nouveau/bsp/g92: disable by default" has been added to the 4.4-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    drm/nouveau/bsp/g92: disable by default

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-bsp-g92-disable-by-default.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@vger.kernel.org> know about it.


>From 194d68dd051c2dd5ac2b522ae16100e774e8d869 Mon Sep 17 00:00:00 2001
From: Ilia Mirkin <imirkin@alum.mit.edu>
Date: Sun, 1 Oct 2017 13:52:43 -0400
Subject: drm/nouveau/bsp/g92: disable by default

From: Ilia Mirkin <imirkin@alum.mit.edu>

commit 194d68dd051c2dd5ac2b522ae16100e774e8d869 upstream.

G92's seem to require some additional bit of initialization before the
BSP engine can work. It feels like clocks are not set up for the
underlying VLD engine, which means that all commands submitted to the
xtensa chip end up hanging. VP seems to work fine though.

This still allows people to force-enable the bsp engine if they want to
play around with it, but makes it harder for the card to hang by
default.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/gpu/drm/nouveau/nvkm/engine/bsp/g84.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/nouveau/nvkm/engine/bsp/g84.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/bsp/g84.c
@@ -40,5 +40,5 @@ int
 g84_bsp_new(struct nvkm_device *device, int index, struct nvkm_engine **pengine)
 {
 	return nvkm_xtensa_new_(&g84_bsp, device, index,
-				true, 0x103000, pengine);
+				device->chipset != 0x92, 0x103000, pengine);
 }


Patches currently in stable-queue which might be from imirkin@alum.mit.edu are

queue-4.4/drm-nouveau-bsp-g92-disable-by-default.patch