Add support for generic electronic privacy screen property, that can be added by systems that have an integrated EPS.
Signed-off-by: Rajat Jain rajatja@google.com --- v9: rebased on top of https://cgit.freedesktop.org/drm/drm-tip:drm-tip v8: Remove the ...destroy_privacy_screen() method and let the property be destroyed along with others at the time of device destruction. (because drm core doesn't also like properties destroyed in late_register()). v7: * Initial version, formed by moving the privacy-screen property into drm core. * Break the init_property() into create_property() and attach_property() so that property can be created while registering connector, but attached in late_register() (after ACPI node detection).
drivers/gpu/drm/drm_atomic_uapi.c | 4 +++ drivers/gpu/drm/drm_connector.c | 51 +++++++++++++++++++++++++++++++ include/drm/drm_connector.h | 24 +++++++++++++++ 3 files changed, 79 insertions(+)
diff --git a/drivers/gpu/drm/drm_atomic_uapi.c b/drivers/gpu/drm/drm_atomic_uapi.c index a1e5e262bae2d..843a8cdacd149 100644 --- a/drivers/gpu/drm/drm_atomic_uapi.c +++ b/drivers/gpu/drm/drm_atomic_uapi.c @@ -766,6 +766,8 @@ static int drm_atomic_connector_set_property(struct drm_connector *connector, fence_ptr); } else if (property == connector->max_bpc_property) { state->max_requested_bpc = val; + } else if (property == connector->privacy_screen_property) { + state->privacy_screen_status = val; } else if (connector->funcs->atomic_set_property) { return connector->funcs->atomic_set_property(connector, state, property, val); @@ -842,6 +844,8 @@ drm_atomic_connector_get_property(struct drm_connector *connector, *val = 0; } else if (property == connector->max_bpc_property) { *val = state->max_requested_bpc; + } else if (property == connector->privacy_screen_property) { + *val = state->privacy_screen_status; } else if (connector->funcs->atomic_get_property) { return connector->funcs->atomic_get_property(connector, state, property, val); diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c index 644f0ad106717..182aa557962b2 100644 --- a/drivers/gpu/drm/drm_connector.c +++ b/drivers/gpu/drm/drm_connector.c @@ -1186,6 +1186,10 @@ static const struct drm_prop_enum_list dp_colorspaces[] = { * can also expose this property to external outputs, in which case they * must support "None", which should be the default (since external screens * have a built-in scaler). + * + * privacy-screen: + * This optional property can be used to enable / disable an integrated + * electronic privacy screen that is available on some displays. */
int drm_connector_create_standard_properties(struct drm_device *dev) @@ -2152,6 +2156,53 @@ int drm_connector_set_panel_orientation_with_quirk( } EXPORT_SYMBOL(drm_connector_set_panel_orientation_with_quirk);
+static const struct drm_prop_enum_list privacy_screen_enum[] = { + { PRIVACY_SCREEN_DISABLED, "Disabled" }, + { PRIVACY_SCREEN_ENABLED, "Enabled" }, +}; + +/** + * drm_connector_create_privacy_screen_property - + * create the drm connecter's privacy-screen property. + * @connector: connector for which to create the privacy-screen property + * + * This function creates the "privacy-screen" property for the + * connector. It is not attached. + */ +void +drm_connector_create_privacy_screen_property(struct drm_connector *connector) +{ + if (connector->privacy_screen_property) + return; + + connector->privacy_screen_property = + drm_property_create_enum(connector->dev, DRM_MODE_PROP_ENUM, + "privacy-screen", privacy_screen_enum, + ARRAY_SIZE(privacy_screen_enum)); +} +EXPORT_SYMBOL(drm_connector_create_privacy_screen_property); + +/** + * drm_connector_attach_privacy_screen_property - + * attach the drm connecter's privacy-screen property. + * @connector: connector on which to attach the privacy-screen property + * + * This function attaches the "privacy-screen" property to the + * connector. Initial state of privacy-screen is set to disabled. + */ +void +drm_connector_attach_privacy_screen_property(struct drm_connector *connector) +{ + struct drm_property *prop = connector->privacy_screen_property; + + if (!prop) + return; + + drm_object_attach_property(&connector->base, prop, + PRIVACY_SCREEN_DISABLED); +} +EXPORT_SYMBOL(drm_connector_attach_privacy_screen_property); + int drm_connector_set_obj_prop(struct drm_mode_object *obj, struct drm_property *property, uint64_t value) diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index 19ae6bb5c85be..f9ce89cc13542 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -271,6 +271,20 @@ struct drm_monitor_range_info { u8 max_vfreq; };
+/** + * enum drm_privacy_screen_status - privacy screen status + * + * This enum is used to track and control the state of the integrated privacy + * screen present on some display panels, via the "privacy-screen" property. + * + * @PRIVACY_SCREEN_DISABLED: The privacy-screen on the panel is disabled + * @PRIVACY_SCREEN_ENABLED: The privacy-screen on the panel is enabled + **/ +enum drm_privacy_screen_status { + PRIVACY_SCREEN_DISABLED = 0, + PRIVACY_SCREEN_ENABLED = 1, +}; + /* * This is a consolidated colorimetry list supported by HDMI and * DP protocol standard. The respective connectors will register @@ -686,6 +700,8 @@ struct drm_connector_state { */ u8 max_bpc;
+ enum drm_privacy_screen_status privacy_screen_status; + /** * @hdr_output_metadata: * DRM blob property for HDR output metadata @@ -1285,6 +1301,12 @@ struct drm_connector { */ struct drm_property *max_bpc_property;
+ /** + * @privacy_screen_property: Optional property for the connector to + * control the integrated privacy screen, if available. + */ + struct drm_property *privacy_screen_property; + #define DRM_CONNECTOR_POLL_HPD (1 << 0) #define DRM_CONNECTOR_POLL_CONNECT (1 << 1) #define DRM_CONNECTOR_POLL_DISCONNECT (1 << 2) @@ -1598,6 +1620,8 @@ int drm_connector_set_panel_orientation_with_quirk( int width, int height); int drm_connector_attach_max_bpc_property(struct drm_connector *connector, int min, int max); +void drm_connector_create_privacy_screen_property(struct drm_connector *conn); +void drm_connector_attach_privacy_screen_property(struct drm_connector *conn);
/** * struct drm_tile_group - Tile group metadata