drm: bridge: dw-hdmi: Store current connector in struct dw_hdmi

Store the connector that the bridge is currently wired to in the dw_hdmi
structure. This is currently identical to the connector field, but will
differ once the driver supports disabling connector creation.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200526011505.31884-21-laurent.pinchart+renesas@ideasonboard.com

drivers/gpu/drm/bridge/synopsys/dw-hdmi.c

@@ -181,6 +181,7 @@ struct dw_hdmi {
 
 	struct mutex mutex;		/* for state below and previous_mode */
 	enum drm_connector_force force;	/* mutex-protected force state */
+	struct drm_connector *curr_conn;/* current connector (only valid when !disabled) */
 	bool disabled;			/* DRM has disabled our bridge */
 	bool bridge_is_on;		/* indicates the bridge is on */
 	bool rxsense;			/* rxsense state */
@@ -2823,23 +2824,32 @@ static void dw_hdmi_bridge_mode_set(struct drm_bridge *bridge,
 	mutex_unlock(&hdmi->mutex);
 }
 
-static void dw_hdmi_bridge_disable(struct drm_bridge *bridge)
+static void dw_hdmi_bridge_atomic_disable(struct drm_bridge *bridge,
+					  struct drm_bridge_state *old_state)
 {
 	struct dw_hdmi *hdmi = bridge->driver_private;
 
 	mutex_lock(&hdmi->mutex);
 	hdmi->disabled = true;
+	hdmi->curr_conn = NULL;
 	dw_hdmi_update_power(hdmi);
 	dw_hdmi_update_phy_mask(hdmi);
 	mutex_unlock(&hdmi->mutex);
 }
 
-static void dw_hdmi_bridge_enable(struct drm_bridge *bridge)
+static void dw_hdmi_bridge_atomic_enable(struct drm_bridge *bridge,
+					 struct drm_bridge_state *old_state)
 {
 	struct dw_hdmi *hdmi = bridge->driver_private;
+	struct drm_atomic_state *state = old_state->base.state;
+	struct drm_connector *connector;
+
+	connector = drm_atomic_get_new_connector_for_encoder(state,
+							     bridge->encoder);
 
 	mutex_lock(&hdmi->mutex);
 	hdmi->disabled = false;
+	hdmi->curr_conn = connector;
 	dw_hdmi_update_power(hdmi);
 	dw_hdmi_update_phy_mask(hdmi);
 	mutex_unlock(&hdmi->mutex);
@@ -2854,8 +2864,8 @@ static const struct drm_bridge_funcs dw_hdmi_bridge_funcs = {
 	.atomic_check = dw_hdmi_bridge_atomic_check,
 	.atomic_get_output_bus_fmts = dw_hdmi_bridge_atomic_get_output_bus_fmts,
 	.atomic_get_input_bus_fmts = dw_hdmi_bridge_atomic_get_input_bus_fmts,
-	.enable = dw_hdmi_bridge_enable,
-	.disable = dw_hdmi_bridge_disable,
+	.atomic_enable = dw_hdmi_bridge_atomic_enable,
+	.atomic_disable = dw_hdmi_bridge_atomic_disable,
 	.mode_set = dw_hdmi_bridge_mode_set,
 	.mode_valid = dw_hdmi_bridge_mode_valid,
 };