[PATCH 2/3] drm/amd/display: Disable VRR on DCE 6
Timur Kristóf
timur.kristof at gmail.com
Sat Aug 2 16:06:01 UTC 2025
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 at gmail.com>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 4 +++-
drivers/gpu/drm/amd/display/dc/dc_helper.c | 5 +++++
drivers/gpu/drm/amd/display/dc/dm_services.h | 2 ++
3 files changed, 10 insertions(+), 1 deletion(-)
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 c71167ffdb76..470f831a17f7 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -10689,6 +10689,8 @@ 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;
@@ -12590,7 +12592,7 @@ 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;
edid = drm_edid_raw(drm_edid); // FIXME: Get rid of drm_edid_raw()
diff --git a/drivers/gpu/drm/amd/display/dc/dc_helper.c b/drivers/gpu/drm/amd/display/dc/dc_helper.c
index 51e41aed7316..5a365bd19933 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_helper.c
+++ b/drivers/gpu/drm/amd/display/dc/dc_helper.c
@@ -755,3 +755,8 @@ 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 7b9c22c45453..7b398d4f4439 100644
--- a/drivers/gpu/drm/amd/display/dc/dm_services.h
+++ b/drivers/gpu/drm/amd/display/dc/dm_services.h
@@ -311,4 +311,6 @@ 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__ */
--
2.50.1
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