These include the drm_connector 'vrr_capable' and the drm_crtc 'vrr_enabled' properties.
Signed-off-by: Nicholas Kazlauskas nicholas.kazlauskas@amd.com --- Documentation/gpu/drm-kms.rst | 7 +++++++ drivers/gpu/drm/drm_connector.c | 22 ++++++++++++++++++++++ 2 files changed, 29 insertions(+)
diff --git a/Documentation/gpu/drm-kms.rst b/Documentation/gpu/drm-kms.rst index 4b1501b4835b..8da2a178cf85 100644 --- a/Documentation/gpu/drm-kms.rst +++ b/Documentation/gpu/drm-kms.rst @@ -575,6 +575,13 @@ Explicit Fencing Properties .. kernel-doc:: drivers/gpu/drm/drm_atomic_uapi.c :doc: explicit fencing properties
+ +Variable Refresh Properties +--------------------------- + +.. kernel-doc:: drivers/gpu/drm/drm_connector.c + :doc: Variable refresh properties + Existing KMS Properties -----------------------
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c index f0deeb7298d0..2a12853ca917 100644 --- a/drivers/gpu/drm/drm_connector.c +++ b/drivers/gpu/drm/drm_connector.c @@ -1254,6 +1254,28 @@ int drm_mode_create_scaling_mode_property(struct drm_device *dev) } EXPORT_SYMBOL(drm_mode_create_scaling_mode_property);
+/** + * DOC: Variable refresh properties + * + * Variable refresh rate control is supported via properties on the + * &drm_connector and &drm_crtc objects. + * + * "vrr_capable": + * Optional &drm_connector boolean property that drivers should attach + * with drm_connector_attach_vrr_capable_property() on connectors that + * could support variable refresh rates. Drivers should update the + * property value by calling drm_connector_set_vrr_capable_property(). + * + * Absence of the property should indicate absence of support. + * + * "vrr_enabled": + * Default &drm_crtc boolean property that notifies the driver that the + * variable refresh rate adjustment should be enabled for the CRTC. + * + * Support for variable refresh rate will depend on the "vrr_capable" + * property exposed on the &drm_connector object. + */ + /** * drm_connector_attach_vrr_capable_property - creates the * vrr_capable property