drm/amd/display: Enable dcn42 in DM

Add support for DCN 4.2 in Display Manager

Signed-off-by: Roman Li <Roman.Li@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

2 files changed, 37 insertions, 7 deletions

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 55e875806ee7..64aa5091fade 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: MIT
 /*
- * Copyright 2015 Advanced Micro Devices, Inc.
+ * Copyright 2015-2026 Advanced Micro Devices, Inc.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
@@ -152,6 +152,9 @@ MODULE_FIRMWARE(FIRMWARE_DCN_36_DMUB);
 #define FIRMWARE_DCN_401_DMUB "amdgpu/dcn_4_0_1_dmcub.bin"
 MODULE_FIRMWARE(FIRMWARE_DCN_401_DMUB);
 
+#define FIRMWARE_DCN_42_DMUB "amdgpu/dcn_4_2_dmcub.bin"
+MODULE_FIRMWARE(FIRMWARE_DCN_42_DMUB);
+
 /**
  * DOC: overview
  *
@@ -1368,6 +1371,7 @@ static int dm_dmub_hw_init(struct amdgpu_device *adev)
 	case IP_VERSION(3, 5, 0):
 	case IP_VERSION(3, 5, 1):
 	case IP_VERSION(3, 6, 0):
+	case IP_VERSION(4, 2, 0):
 		hw_params.ips_sequential_ono = adev->external_rev_id > 0x10;
 		hw_params.lower_hbr3_phy_ssc = true;
 		break;
@@ -1815,6 +1819,9 @@ static void *dm_dmub_get_vbios_bounding_box(struct amdgpu_device *adev)
 	case IP_VERSION(4, 0, 1):
 		bb_size = sizeof(struct dml2_soc_bb);
 		break;
+	case IP_VERSION(4, 2, 0):
+		bb_size = sizeof(struct dml2_soc_bb);
+		break;
 	default:
 		return NULL;
 	}
@@ -1859,6 +1866,9 @@ static enum dmub_ips_disable_type dm_get_default_ips_mode(
 	case IP_VERSION(3, 5, 1):
 		ret =  DMUB_IPS_RCG_IN_ACTIVE_IPS2_IN_OFF;
 		break;
+	case IP_VERSION(4, 2, 0):
+		ret =  DMUB_IPS_DISABLE_ALL;
+		break;
 	default:
 		/* ASICs older than DCN35 do not have IPSs */
 		if (amdgpu_ip_version(adev, DCE_HWIP, 0) < IP_VERSION(3, 5, 0))
@@ -2002,6 +2012,13 @@ static int amdgpu_dm_init(struct amdgpu_device *adev)
 	if (amdgpu_ip_version(adev, DCE_HWIP, 0) >= IP_VERSION(3, 0, 0))
 		init_data.num_virtual_links = 1;
 
+	/* DCN42 and above dpia switch to unified link training path */
+	if (amdgpu_ip_version(adev, DCE_HWIP, 0) >= IP_VERSION(4, 2, 0)) {
+		init_data.flags.consolidated_dpia_dp_lt = true;
+		init_data.flags.enable_dpia_pre_training = true;
+		init_data.flags.unify_link_enc_assignment = true;
+		init_data.flags.usb4_bw_alloc_support = true;
+	}
 	retrieve_dmi_info(&adev->dm);
 	if (adev->dm.edp0_on_dp1_quirk)
 		init_data.flags.support_edp0_on_dp1 = true;
@@ -2369,6 +2386,7 @@ static int load_dmcu_fw(struct amdgpu_device *adev)
 		case IP_VERSION(3, 5, 1):
 		case IP_VERSION(3, 6, 0):
 		case IP_VERSION(4, 0, 1):
+		case IP_VERSION(4, 2, 0):
 			return 0;
 		default:
 			break;
@@ -2502,7 +2520,9 @@ static int dm_dmub_sw_init(struct amdgpu_device *adev)
 	case IP_VERSION(4, 0, 1):
 		dmub_asic = DMUB_ASIC_DCN401;
 		break;
-
+	case IP_VERSION(4, 2, 0):
+		dmub_asic = DMUB_ASIC_DCN42;
+		break;
 	default:
 		/* ASIC doesn't support DMUB. */
 		return 0;
@@ -5449,6 +5469,7 @@ static int amdgpu_dm_initialize_drm_device(struct amdgpu_device *adev)
 	case IP_VERSION(3, 5, 1):
 	case IP_VERSION(3, 6, 0):
 	case IP_VERSION(4, 0, 1):
+	case IP_VERSION(4, 2, 0):
 		if (register_outbox_irq_handlers(dm->adev)) {
 			drm_err(adev_to_drm(adev), "DM: Failed to initialize IRQ\n");
 			goto fail;
@@ -5473,6 +5494,7 @@ static int amdgpu_dm_initialize_drm_device(struct amdgpu_device *adev)
 		case IP_VERSION(3, 5, 1):
 		case IP_VERSION(3, 6, 0):
 		case IP_VERSION(4, 0, 1):
+		case IP_VERSION(4, 2, 0):
 			psr_feature_enabled = true;
 			break;
 		default:
@@ -5650,6 +5672,7 @@ static int amdgpu_dm_initialize_drm_device(struct amdgpu_device *adev)
 		case IP_VERSION(3, 5, 1):
 		case IP_VERSION(3, 6, 0):
 		case IP_VERSION(4, 0, 1):
+		case IP_VERSION(4, 2, 0):
 			if (dcn10_register_irq_handlers(dm->adev)) {
 				drm_err(adev_to_drm(adev), "DM: Failed to initialize IRQ\n");
 				goto fail;
@@ -5798,6 +5821,9 @@ static int dm_init_microcode(struct amdgpu_device *adev)
 	case IP_VERSION(4, 0, 1):
 		fw_name_dmub = FIRMWARE_DCN_401_DMUB;
 		break;
+	case IP_VERSION(4, 2, 0):
+		fw_name_dmub = FIRMWARE_DCN_42_DMUB;
+		break;
 	default:
 		/* ASIC doesn't support DMUB. */
 		return 0;
@@ -5925,6 +5951,7 @@ static int dm_early_init(struct amdgpu_ip_block *ip_block)
 		case IP_VERSION(3, 5, 1):
 		case IP_VERSION(3, 6, 0):
 		case IP_VERSION(4, 0, 1):
+		case IP_VERSION(4, 2, 0):
 			adev->mode_info.num_crtc = 4;
 			adev->mode_info.num_hpd = 4;
 			adev->mode_info.num_dig = 4;
@@ -12223,10 +12250,11 @@ static int dm_crtc_get_cursor_mode(struct amdgpu_device *adev,
 	int i;
 
 	/* Overlay cursor not supported on HW before DCN
-	 * DCN401 does not have the cursor-on-scaled-plane or cursor-on-yuv-plane restrictions
-	 * as previous DCN generations, so enable native mode on DCN401
+	 * DCN401/420 does not have the cursor-on-scaled-plane or cursor-on-yuv-plane restrictions
+	 * as previous DCN generations, so enable native mode on DCN401/420
 	 */
-	if (amdgpu_ip_version(adev, DCE_HWIP, 0) == IP_VERSION(4, 0, 1)) {
+	if (amdgpu_ip_version(adev, DCE_HWIP, 0) == IP_VERSION(4, 0, 1) ||
+	    amdgpu_ip_version(adev, DCE_HWIP, 0) == IP_VERSION(4, 2, 0)) {
 		*cursor_mode = DM_CURSOR_NATIVE_MODE;
 		return 0;
 	}
@@ -12646,7 +12674,8 @@ static int amdgpu_dm_atomic_check(struct drm_device *dev,
 
 		/* Check if rotation or scaling is enabled on DCN401 */
 		if ((drm_plane_mask(crtc->cursor) & new_crtc_state->plane_mask) &&
-		    amdgpu_ip_version(adev, DCE_HWIP, 0) == IP_VERSION(4, 0, 1)) {
+		    (amdgpu_ip_version(adev, DCE_HWIP, 0) == IP_VERSION(4, 2, 0) ||
+		    amdgpu_ip_version(adev, DCE_HWIP, 0) == IP_VERSION(4, 0, 1))) {
 			new_cursor_state = drm_atomic_get_new_plane_state(state, crtc->cursor);
 
 			is_rotated = new_cursor_state &&
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
index 70587e5a8d46..6e08efdd79e1 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: MIT
 /*
- * Copyright 2022 Advanced Micro Devices, Inc.
+ * Copyright 2022-2026 Advanced Micro Devices, Inc.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
@@ -759,6 +759,7 @@ static int amdgpu_dm_plane_get_plane_modifiers(struct amdgpu_device *adev, unsig
 	case AMDGPU_FAMILY_GC_11_0_0:
 	case AMDGPU_FAMILY_GC_11_0_1:
 	case AMDGPU_FAMILY_GC_11_5_0:
+	case AMDGPU_FAMILY_GC_11_5_4:
 		amdgpu_dm_plane_add_gfx11_modifiers(adev, mods, &size, &capacity);
 		break;
 	case AMDGPU_FAMILY_GC_12_0_0: