drm/omap: dsi: display_disable cleanup

We can drop dsi_display_disable() which just calls
_dsi_display_disable(), and rename _dsi_display_disable() to
dsi_display_disable().

The WARN_ON(!dsi_bus_is_locked(dsi)) in dsi_display_disable is extra and
can be dropped, as _dsi_display_disable() has the same WARN_ON().
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201215104657.802264-78-tomi.valkeinen@ti.com

drivers/gpu/drm/omapdrm/dss/dsi.c

@@ -63,8 +63,6 @@ static int dsi_vc_send_null(struct dsi_data *dsi, int vc, int channel);
 static ssize_t _omap_dsi_host_transfer(struct dsi_data *dsi, int vc,
 				       const struct mipi_dsi_msg *msg);
 
-static void dsi_display_disable(struct omap_dss_device *dssdev);
-
 #ifdef DSI_PERF_MEASURE
 static bool dsi_perf;
 module_param(dsi_perf, bool, 0644);
@@ -3769,7 +3767,7 @@ static void dsi_display_enable(struct dsi_data *dsi)
 	DSSDBG("dsi_display_ulps_enable FAILED\n");
 }
 
-static void _dsi_display_disable(struct dsi_data *dsi,
+static void dsi_display_disable(struct dsi_data *dsi,
 		bool disconnect_lanes, bool enter_ulps)
 {
 	WARN_ON(!dsi_bus_is_locked(dsi));
@@ -3788,17 +3786,6 @@ static void _dsi_display_disable(struct dsi_data *dsi,
 	mutex_unlock(&dsi->lock);
 }
 
-static void dsi_display_disable(struct omap_dss_device *dssdev)
-{
-	struct dsi_data *dsi = to_dsi_data(dssdev);
-
-	WARN_ON(!dsi_bus_is_locked(dsi));
-
-	DSSDBG("dsi_display_disable\n");
-
-	_dsi_display_disable(dsi, true, false);
-}
-
 static int dsi_enable_te(struct dsi_data *dsi, bool enable)
 {
 	dsi->te_enabled = enable;
@@ -3822,7 +3809,7 @@ static void omap_dsi_ulps_work_callback(struct work_struct *work)
 
 	dsi_enable_te(dsi, false);
 
-	_dsi_display_disable(dsi, false, true);
+	dsi_display_disable(dsi, false, true);
 
 	dsi_bus_unlock(dsi);
 }
@@ -4956,7 +4943,7 @@ static void dsi_bridge_disable(struct drm_bridge *bridge)
 
 	dsi_disable_video_output(dssdev, VC_VIDEO);
 
-	dsi_display_disable(dssdev);
+	dsi_display_disable(dsi, true, false);
 
 	dsi_bus_unlock(dsi);
 }