drm/panel: panel-dsi-cm: cleanup tear enable

Simplify the code by moving code from _dsicm_enable_te() into
dsicm_power_on().
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201215104657.802264-57-tomi.valkeinen@ti.com

drivers/gpu/drm/panel/panel-dsi-cm.c

@@ -68,8 +68,6 @@ static inline struct panel_drv_data *panel_to_ddata(struct drm_panel *panel)
 	return container_of(panel, struct panel_drv_data, panel);
 }
 
-static int _dsicm_enable_te(struct panel_drv_data *ddata, bool enable);
-
 static void dsicm_bl_power(struct panel_drv_data *ddata, bool enable)
 {
 	struct backlight_device *backlight;
@@ -313,10 +311,13 @@ static int dsicm_power_on(struct panel_drv_data *ddata)
 	if (r)
 		goto err;
 
-	r = _dsicm_enable_te(ddata, true);
+	r = mipi_dsi_dcs_set_tear_on(ddata->dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
 	if (r)
 		goto err;
 
+	/* possible panel bug */
+	msleep(100);
+
 	ddata->enabled = true;
 
 	if (!ddata->intro_printed) {
@@ -417,22 +418,6 @@ static int dsicm_disable(struct drm_panel *panel)
 	return r;
 }
 
-static int _dsicm_enable_te(struct panel_drv_data *ddata, bool enable)
-{
-	struct mipi_dsi_device *dsi = ddata->dsi;
-	int r;
-
-	if (enable)
-		r = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
-	else
-		r = mipi_dsi_dcs_set_tear_off(dsi);
-
-	/* possible panel bug */
-	msleep(100);
-
-	return r;
-}
-
 static int dsicm_get_modes(struct drm_panel *panel,
 			   struct drm_connector *connector)
 {