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_display.c

@@ -249,7 +249,7 @@ int dsi_display_set_backlight(struct drm_connector *connector,
 	/* use bl_temp as index of dimming bl lut to find the dimming panel backlight */
 	if (bl_temp != 0 && panel->bl_config.dimming_bl_lut &&
 	    bl_temp < panel->bl_config.dimming_bl_lut->length) {
-		pr_debug("before dimming bl_temp = %u, after dimming bl_temp = %lu\n",
+		DSI_DEBUG("before dimming bl_temp = %u, after dimming bl_temp = %lu\n",
 			bl_temp, panel->bl_config.dimming_bl_lut->mapped_bl[bl_temp]);
 		bl_temp = panel->bl_config.dimming_bl_lut->mapped_bl[bl_temp];
 	}
@@ -257,10 +257,10 @@ int dsi_display_set_backlight(struct drm_connector *connector,
 	if (bl_temp > panel->bl_config.bl_max_level)
 		bl_temp = panel->bl_config.bl_max_level;
 
-        if (bl_temp && (bl_temp < panel->bl_config.bl_min_level))
-                bl_temp = panel->bl_config.bl_min_level;
+	if (bl_temp && (bl_temp < panel->bl_config.bl_min_level))
+		bl_temp = panel->bl_config.bl_min_level;
 
-	pr_debug("bl_scale = %u, bl_scale_sv = %u, bl_lvl = %u\n",
+	DSI_DEBUG("bl_scale = %u, bl_scale_sv = %u, bl_lvl = %u\n",
 		bl_scale, bl_scale_sv, (u32)bl_temp);
 
 	rc = dsi_panel_set_backlight(panel, (u32)bl_temp);