This is a note to let you know that I've just added the patch titled
drm/nouveau/kms/nv140-: Disable interlacing
to the 6.0-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-kms-nv140-disable-interlacing.patch
and it can be found in the queue-6.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 8ba9249396bef37cb68be9e8dee7847f1737db9d Mon Sep 17 00:00:00 2001
From: Lyude Paul <lyude@xxxxxxxxxx>
Date: Tue, 16 Aug 2022 14:04:36 -0400
Subject: drm/nouveau/kms/nv140-: Disable interlacing
From: Lyude Paul <lyude@xxxxxxxxxx>
commit 8ba9249396bef37cb68be9e8dee7847f1737db9d upstream.
As it turns out: while Nvidia does actually have interlacing knobs on their
GPU still pretty much no current GPUs since Volta actually support it.
Trying interlacing on these GPUs will result in NVDisplay being quite
unhappy like so:
nouveau 0000:1f:00.0: disp: chid 0 stat 00004802 reason 4 [INVALID_ARG] mthd 2008 data 00000001 code 00080000
nouveau 0000:1f:00.0: disp: chid 0 stat 10005080 reason 5 [INVALID_STATE] mthd 0200 data 00000001 code 00000001
So let's fix this by following the same behavior Nvidia's driver does and
disable interlacing entirely.
Signed-off-by: Lyude Paul <lyude@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Reviewed-by: Karol Herbst <kherbst@xxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20220816180436.156310-1-lyude@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/nouveau/nouveau_connector.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/nouveau/nouveau_connector.c
+++ b/drivers/gpu/drm/nouveau/nouveau_connector.c
@@ -504,7 +504,8 @@ nouveau_connector_set_encoder(struct drm
connector->interlace_allowed =
nv_encoder->caps.dp_interlace;
else
- connector->interlace_allowed = true;
+ connector->interlace_allowed =
+ drm->client.device.info.family < NV_DEVICE_INFO_V0_VOLTA;
connector->doublescan_allowed = true;
} else
if (nv_encoder->dcb->type == DCB_OUTPUT_LVDS ||
Patches currently in stable-queue which might be from lyude@xxxxxxxxxx are
queue-6.0/drm-nouveau-kms-nv140-disable-interlacing.patch
queue-6.0/drm-nouveau-fix-a-use-after-free-in-nouveau_gem_prime_import_sg_table.patch
