[PATCH 6.12 085/169] drm/nouveau: add missing DCB connector types

Greg Kroah-Hartman
2026-01-28T15:47:11Z

From: Alex Ramírez <lxrmrz732@rocketmail.com>

[ Upstream commit 3036b4ce4b209af690fa776e4616925892caba4c ]

* Add missing DCB connectors in conn.h as per the NVIDIA DCB specification.

A lot of connector logic was rewritten for Linux v6.5; some display connector types
went unaccounted-for which caused kernel warnings on devices with the now-unsupported
DCB connectors. This patch adds all of the DCB connectors as defined by NVIDIA to the
dcb_connector_type enum to bring back support for these connectors to the new logic.

Fixes: 8b7d92cad953 ("drm/nouveau/kms/nv50-: create connectors based on nvkm info")
Link: https://download.nvidia.com/open-gpu-doc/DCB/1/DCB-4.0-Specification.html#_connector_table_entry
Signed-off-by: Alex Ramírez <lxrmrz732@rocketmail.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
[Lyude: Clarify DCB_CONNECTOR_HDMI_0 weirdness in comments]
Signed-off-by: Lyude Paul <lyude@redhat.com>
Link: https://patch.msgid.link/20251213005327.9495-2-lxrmrz732@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
.../nouveau/include/nvkm/subdev/bios/conn.h | 95 +++++++++++++++----
1 file changed, 74 insertions(+), 21 deletions(-)

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 d1beaad0c82b6..834ed6587aa52 100644
--- a/drivers/gpu/drm/nouveau/include/nvkm/subdev/bios/conn.h
+++ b/drivers/gpu/drm/nouveau/include/nvkm/subdev/bios/conn.h
@@ -1,28 +1,81 @@
/* SPDX-License-Identifier: MIT */
#ifndef __NVBIOS_CONN_H__
#define __NVBIOS_CONN_H__
+
+/*
+ * An enumerator representing all of the possible VBIOS connector types defined
+ * by Nvidia at
+ * https://nvidia.github.io/open-gpu-doc/DCB/DCB-4.x-Specification.html.
+ *
+ * [1] Nvidia's documentation actually claims DCB_CONNECTOR_HDMI_0 is a "3-Pin
+ * DIN Stereo Connector". This seems very likely to be a documentation typo
+ * or some sort of funny historical baggage, because we've treated this
+ * connector type as HDMI for years without issue.
+ * TODO: Check with Nvidia what's actually happening here.
+ */
enum dcb_connector_type {
- DCB_CONNECTOR_VGA = 0x00,
- DCB_CONNECTOR_TV_0 = 0x10,
- DCB_CONNECTOR_TV_1 = 0x11,
- DCB_CONNECTOR_TV_3 = 0x13,
- DCB_CONNECTOR_DVI_I = 0x30,
- DCB_CONNECTOR_DVI_D = 0x31,
- DCB_CONNECTOR_DMS59_0 = 0x38,
- DCB_CONNECTOR_DMS59_1 = 0x39,
- DCB_CONNECTOR_LVDS = 0x40,
- 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,
- DCB_CONNECTOR_DMS59_DP0 = 0x64,
- DCB_CONNECTOR_DMS59_DP1 = 0x65,
- DCB_CONNECTOR_WFD = 0x70,
- DCB_CONNECTOR_USB_C = 0x71,
- DCB_CONNECTOR_NONE = 0xff
+ /* Analog outputs */
+ DCB_CONNECTOR_VGA = 0x00, // VGA 15-pin connector
+ DCB_CONNECTOR_DVI_A = 0x01, // DVI-A
+ DCB_CONNECTOR_POD_VGA = 0x02, // Pod - VGA 15-pin connector
+ DCB_CONNECTOR_TV_0 = 0x10, // TV - Composite Out
+ DCB_CONNECTOR_TV_1 = 0x11, // TV - S-Video Out
+ DCB_CONNECTOR_TV_2 = 0x12, // TV - S-Video Breakout - Composite
+ DCB_CONNECTOR_TV_3 = 0x13, // HDTV Component - YPrPb
+ DCB_CONNECTOR_TV_SCART = 0x14, // TV - SCART Connector
+ DCB_CONNECTOR_TV_SCART_D = 0x16, // TV - Composite SCART over D-connector
+ DCB_CONNECTOR_TV_DTERM = 0x17, // HDTV - D-connector (EIAJ4120)
+ DCB_CONNECTOR_POD_TV_3 = 0x18, // Pod - HDTV - YPrPb
+ DCB_CONNECTOR_POD_TV_1 = 0x19, // Pod - S-Video
+ DCB_CONNECTOR_POD_TV_0 = 0x1a, // Pod - Composite
+
+ /* DVI digital outputs */
+ DCB_CONNECTOR_DVI_I_TV_1 = 0x20, // DVI-I-TV-S-Video
+ DCB_CONNECTOR_DVI_I_TV_0 = 0x21, // DVI-I-TV-Composite
+ DCB_CONNECTOR_DVI_I_TV_2 = 0x22, // DVI-I-TV-S-Video Breakout-Composite
+ DCB_CONNECTOR_DVI_I = 0x30, // DVI-I
+ DCB_CONNECTOR_DVI_D = 0x31, // DVI-D
+ DCB_CONNECTOR_DVI_ADC = 0x32, // Apple Display Connector (ADC)
+ DCB_CONNECTOR_DMS59_0 = 0x38, // LFH-DVI-I-1
+ DCB_CONNECTOR_DMS59_1 = 0x39, // LFH-DVI-I-2
+ DCB_CONNECTOR_BNC = 0x3c, // BNC Connector [for SDI?]
+
+ /* LVDS / TMDS digital outputs */
+ DCB_CONNECTOR_LVDS = 0x40, // LVDS-SPWG-Attached [is this name correct?]
+ DCB_CONNECTOR_LVDS_SPWG = 0x41, // LVDS-OEM-Attached (non-removable)
+ DCB_CONNECTOR_LVDS_REM = 0x42, // LVDS-SPWG-Detached [following naming above]
+ DCB_CONNECTOR_LVDS_SPWG_REM = 0x43, // LVDS-OEM-Detached (removable)
+ DCB_CONNECTOR_TMDS = 0x45, // TMDS-OEM-Attached (non-removable)
+
+ /* DP digital outputs */
+ DCB_CONNECTOR_DP = 0x46, // DisplayPort External Connector
+ DCB_CONNECTOR_eDP = 0x47, // DisplayPort Internal Connector
+ DCB_CONNECTOR_mDP = 0x48, // DisplayPort (Mini) External Connector
+
+ /* Dock outputs (not used) */
+ DCB_CONNECTOR_DOCK_VGA_0 = 0x50, // VGA 15-pin if not docked
+ DCB_CONNECTOR_DOCK_VGA_1 = 0x51, // VGA 15-pin if docked
+ DCB_CONNECTOR_DOCK_DVI_I_0 = 0x52, // DVI-I if not docked
+ DCB_CONNECTOR_DOCK_DVI_I_1 = 0x53, // DVI-I if docked
+ DCB_CONNECTOR_DOCK_DVI_D_0 = 0x54, // DVI-D if not docked
+ DCB_CONNECTOR_DOCK_DVI_D_1 = 0x55, // DVI-D if docked
+ DCB_CONNECTOR_DOCK_DP_0 = 0x56, // DisplayPort if not docked
+ DCB_CONNECTOR_DOCK_DP_1 = 0x57, // DisplayPort if docked
+ DCB_CONNECTOR_DOCK_mDP_0 = 0x58, // DisplayPort (Mini) if not docked
+ DCB_CONNECTOR_DOCK_mDP_1 = 0x59, // DisplayPort (Mini) if docked
+
+ /* HDMI? digital outputs */
+ DCB_CONNECTOR_HDMI_0 = 0x60, // HDMI? See [1] in top-level enum comment above
+ DCB_CONNECTOR_HDMI_1 = 0x61, // HDMI-A connector
+ DCB_CONNECTOR_SPDIF = 0x62, // Audio S/PDIF connector
+ DCB_CONNECTOR_HDMI_C = 0x63, // HDMI-C (Mini) connector
+
+ /* Misc. digital outputs */
+ DCB_CONNECTOR_DMS59_DP0 = 0x64, // LFH-DP-1
+ DCB_CONNECTOR_DMS59_DP1 = 0x65, // LFH-DP-2
+ DCB_CONNECTOR_WFD = 0x70, // Virtual connector for Wifi Display (WFD)
+ DCB_CONNECTOR_USB_C = 0x71, // [DP over USB-C; not present in docs]
+ DCB_CONNECTOR_NONE = 0xff // Skip Entry
};

struct nvbios_connT {
--
2.51.0