Karol Herbst
2020-Nov-27 18:39 UTC
[Nouveau] [PATCH] drm/nouveau/kms: handle mDP connectors
In some cases we have the handle those explicitly as the fallback
connector type detection fails and marks those as eDP connectors.
Attempting to use such a connector with mutter leads to a crash of mutter
as it ends up with two eDP displays.
Information is taken from the official DCB documentation.
Cc: stable at vger.kernel.org
Cc: dri-devel at lists.freedesktop.org
Cc: Ben Skeggs <bskeggs at redhat.com>
Reported-by: Mark Pearson <markpearson at lenovo.com>
Tested-by: Mark Pearson <markpearson at lenovo.com>
Signed-off-by: Karol Herbst <kherbst at redhat.com>
---
drivers/gpu/drm/nouveau/include/nvkm/subdev/bios/conn.h | 1 +
drivers/gpu/drm/nouveau/nouveau_connector.c | 1 +
2 files changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/nouveau/include/nvkm/subdev/bios/conn.h
b/drivers/gpu/drm/nouveau/include/nvkm/subdev/bios/conn.h
index f5f59261ea81..d1beaad0c82b 100644
--- a/drivers/gpu/drm/nouveau/include/nvkm/subdev/bios/conn.h
+++ b/drivers/gpu/drm/nouveau/include/nvkm/subdev/bios/conn.h
@@ -14,6 +14,7 @@ enum dcb_connector_type {
DCB_CONNECTOR_LVDS_SPWG = 0x41,
DCB_CONNECTOR_DP = 0x46,
DCB_CONNECTOR_eDP = 0x47,
+ DCB_CONNECTOR_mDP = 0x48,
DCB_CONNECTOR_HDMI_0 = 0x60,
DCB_CONNECTOR_HDMI_1 = 0x61,
DCB_CONNECTOR_HDMI_C = 0x63,
diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c
b/drivers/gpu/drm/nouveau/nouveau_connector.c
index 8b4b3688c7ae..4c992fd5bd68 100644
--- a/drivers/gpu/drm/nouveau/nouveau_connector.c
+++ b/drivers/gpu/drm/nouveau/nouveau_connector.c
@@ -1210,6 +1210,7 @@ drm_conntype_from_dcb(enum dcb_connector_type dcb)
case DCB_CONNECTOR_DMS59_DP0:
case DCB_CONNECTOR_DMS59_DP1:
case DCB_CONNECTOR_DP :
+ case DCB_CONNECTOR_mDP :
case DCB_CONNECTOR_USB_C : return DRM_MODE_CONNECTOR_DisplayPort;
case DCB_CONNECTOR_eDP : return DRM_MODE_CONNECTOR_eDP;
case DCB_CONNECTOR_HDMI_0 :
--
2.28.0