Pull PollingComponent up from individual display drivers to Display. (#5444)

esphome/components/display/__init__.py

@@ -58,7 +58,7 @@ BASIC_DISPLAY_SCHEMA = cv.Schema(
     {
         cv.Optional(CONF_LAMBDA): cv.lambda_,
     }
-)
+).extend(cv.polling_component_schema("1s"))
 
 FULL_DISPLAY_SCHEMA = BASIC_DISPLAY_SCHEMA.extend(
     {
@@ -116,6 +116,7 @@ async def setup_display_core_(var, config):
 
 
 async def register_display(var, config):
+    await cg.register_component(var, config)
     await setup_display_core_(var, config)
 
 

esphome/components/display/display.h

@@ -163,7 +163,7 @@ class BaseFont {
   virtual void measure(const char *str, int *width, int *x_offset, int *baseline, int *height) = 0;
 };
 
-class Display {
+class Display : public PollingComponent {
  public:
   /// Fill the entire screen with the given color.
   virtual void fill(Color color);