From: Timur Kristóf <timur.kristof@gmail.com>
Date: Mon, 25 Aug 2025 21:56:30 +0000 (+0200)
Subject: drm/amd/display: Disable VRR on DCE 6
X-Git-Tag: v6.12.58~200
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=15abc54efdcc6940163144582ff9d540655078b3;p=thirdparty%2Fkernel%2Fstable.git

drm/amd/display: Disable VRR on DCE 6

[ Upstream commit 043c87d7d56e135393f8aab927148096e2d17589 ]

DCE 6 was not advertised as being able to support VRR,
so let's mark it as unsupported for now.

The VRR implementation in amdgpu_dm depends on the VUPDATE
interrupt which is not registered for DCE 6.

Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Reviewed-by: Rodrigo Siqueira <siqueira@igalia.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

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 37307caf92999..ea6bc9517ed86 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -10455,6 +10455,8 @@ static void get_freesync_config_for_crtc(
 		} else {
 			config.state = VRR_STATE_INACTIVE;
 		}
+	} else {
+		config.state = VRR_STATE_UNSUPPORTED;
 	}
 out:
 	new_crtc_state->freesync_config = config;
@@ -12357,7 +12359,7 @@ void amdgpu_dm_update_freesync_caps(struct drm_connector *connector,
 
 	dm_con_state = to_dm_connector_state(connector->state);
 
-	if (!adev->dm.freesync_module)
+	if (!adev->dm.freesync_module || !dc_supports_vrr(sink->ctx->dce_version))
 		goto update;
 
 	/* Some eDP panels only have the refresh rate range info in DisplayID */
diff --git a/drivers/gpu/drm/amd/display/dc/dc_helper.c b/drivers/gpu/drm/amd/display/dc/dc_helper.c
index b402be59b2c83..0f333c27787d6 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_helper.c
+++ b/drivers/gpu/drm/amd/display/dc/dc_helper.c
@@ -747,3 +747,8 @@ char *dce_version_to_string(const int version)
 		return "Unknown";
 	}
 }
+
+bool dc_supports_vrr(const enum dce_version v)
+{
+	return v >= DCE_VERSION_8_0;
+}
diff --git a/drivers/gpu/drm/amd/display/dc/dm_services.h b/drivers/gpu/drm/amd/display/dc/dm_services.h
index 9405c47ee2a9a..a7c2740e51b88 100644
--- a/drivers/gpu/drm/amd/display/dc/dm_services.h
+++ b/drivers/gpu/drm/amd/display/dc/dm_services.h
@@ -304,4 +304,6 @@ void dm_dtn_log_end(struct dc_context *ctx,
 
 char *dce_version_to_string(const int version);
 
+bool dc_supports_vrr(const enum dce_version v);
+
 #endif /* __DM_SERVICES_H__ */