| From 8ba9249396bef37cb68be9e8dee7847f1737db9d Mon Sep 17 00:00:00 2001 |
| From: Lyude Paul <lyude@redhat.com> |
| Date: Tue, 16 Aug 2022 14:04:36 -0400 |
| Subject: drm/nouveau/kms/nv140-: Disable interlacing |
| |
| From: Lyude Paul <lyude@redhat.com> |
| |
| 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> |
| --- |
| 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 |
| @@ -500,7 +500,8 @@ 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 || |
