disp: msm: sde: add new support for digital dimming

Add new properties to support dynamically turning on and off digital
dimming and setting new minimum backlight.

Change-Id: I3b94190877d556768ba2c92ec59432dec44de0de
Signed-off-by: Ping Li <pingli@codeaurora.org>

msm/dsi/dsi_panel.c

@@ -2445,6 +2445,9 @@ static int dsi_panel_parse_bl_config(struct dsi_panel *panel)
 
 	panel->bl_config.bl_scale = MAX_BL_SCALE_LEVEL;
 	panel->bl_config.bl_scale_sv = MAX_SV_BL_SCALE_LEVEL;
+	panel->bl_config.dimming_min_bl = 0;
+	panel->bl_config.dimming_status = DIMMING_ENABLE;
+	panel->bl_config.user_disable_notification = false;
 
 	rc = utils->read_u32(utils->data, "qcom,mdss-dsi-bl-min-level", &val);
 	if (rc) {