patch-4-amdgpu-vrr-whitelist.patch

From 941725c67e25021a4321cf21eed4a69048526b1e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tomasz=20Paku=C5=82a?= <forest10pl@gmail.com>
Date: Tue, 9 Dec 2025 14:38:45 +0100
Subject: [PATCH] amdgpu: Add CH7218 PCON to the VRR whitelist
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Chrontel CH7218 found in Ugreen DP -> HDMI 2.1 adapter (model 85564)
works perfectly with VRR after testing. VRR and FreeSync compatibility
is explicitly advertised as a feature so it's addition is a formality.

Signed-off-by: Tomasz Pakuła <tomasz.pakula.oficjalny@gmail.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 1 +
 drivers/gpu/drm/amd/display/include/ddc_service_types.h   | 1 +
 2 files changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
index d0f770dd0a95..f01f30a245ad 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
@@ -1374,6 +1374,7 @@ static bool dm_is_freesync_pcon_whitelist(const uint32_t branch_dev_id)
 	case DP_BRANCH_DEVICE_ID_0060AD:
 	case DP_BRANCH_DEVICE_ID_00E04C:
 	case DP_BRANCH_DEVICE_ID_90CC24:
+	case DP_BRANCH_DEVICE_ID_2B02F0:
 		ret_val = true;
 		break;
 	default:
diff --git a/drivers/gpu/drm/amd/display/include/ddc_service_types.h b/drivers/gpu/drm/amd/display/include/ddc_service_types.h
index 1c603b12957f..e838f7c1269c 100644
--- a/drivers/gpu/drm/amd/display/include/ddc_service_types.h
+++ b/drivers/gpu/drm/amd/display/include/ddc_service_types.h
@@ -36,6 +36,7 @@
 #define DP_BRANCH_DEVICE_ID_006037 0x006037
 #define DP_BRANCH_DEVICE_ID_001CF8 0x001CF8
 #define DP_BRANCH_DEVICE_ID_0060AD 0x0060AD
+#define DP_BRANCH_DEVICE_ID_2B02F0 0x2B02F0 /* Chrontel CH7218 */
 #define DP_BRANCH_HW_REV_10 0x10
 #define DP_BRANCH_HW_REV_20 0x20
 
-- 
2.52.0