Fix for esphome 2023.12.x

[daernsinstantfortress]

What does this implement/fix?

Fixes some compatibility issues introduced with changes in ESPHome 2023.12.0

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Other

Test Environment

• ESP32
• ESP32 IDF
• ESP8266
• RP2040

Checklist:

• The code change is tested and works locally.
• Tests have been added to verify that the new code works (under tests/ folder).

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated in esphome-docs.

[daernsinstantfortress]

In the last release of ESPHome, some small changes were done to the display
component, to make subcomponents leaner. With those changes, compilation breaks
if a display is trying to register as a component itself (this is now done
automatically when registering the display).

Also, DisplayBuffer now automatically inherits from PollingComponent, so there is no need to explicitly inherit from that.

[hagak]

I attempted to use your fork @daernsinstantfortress . However this fails against esphome 2023.12.9, reason is in 2023.12.9 the DisplayBufferRet no longer exists.

[daernsinstantfortress]

@hagak Someone else reported something similar, but I've just retested as a clean build against my own 2023.12.9 install and it built ok using this:

external_components:
  - source: github://daernsinstantfortress/esphome-lilygo-t5-47@lilygo-t5-47
    components:
      - lilygo_t5_47

...so I can't explain the mismatch in behaviour here.

[hagak]

Well I mean if you go and look at esphome/esphome display component the DisplayBufferRet does not exist anymore. Maybe you have building against an older version? I know the fork you have is a pretty old fork of esphome and is not 2023.12.9.