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drm/nouveau/kms/nv140-: Disable interlacing

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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@redhat.com>
Cc: stable@vger.kernel.org
Reviewed-by: Karol Herbst <kherbst@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220816180436.156310-1-lyude@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Lyude Paul 2022-08-16 14:04:36 -04:00 committed by Greg Kroah-Hartman
parent 4dab0d27a4
commit 446d40e2a8
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/nouveau/nouveau_connector.c
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@ -503,7 +503,8 @@ nouveau_connector_set_encoder(struct drm_connector *connector,
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 ||