ESP32-P4 PPA (Pixel Processing Accelerator) engine instead of software rotation

[agillis]

What does this implement/fix?

Add hardware-accelerated rotation using the ESP32-P4 PPA (Pixel Processing
Accelerator) engine instead of software rotation.

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)
• Developer breaking change (an API change that could break external components)
• Code quality improvements to existing code or addition of tests
• Other

Related issue or feature (if applicable):

• fixes

Pull request in esphome-docs with documentation (if applicable):

• esphome/esphome-docs#

Test Environment

• ESP32
• ESP32 IDF
• ESP8266
• RP2040
• BK72xx
• RTL87xx
• LN882x
• nRF52840

Example entry for config.yaml:

# Example config.yaml

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.

[github-actions]

To use the changes from this PR as an external component, add the following to your ESPHome configuration YAML file:

external_components:
  - source: github://clydebarrow/esphome@pull/139/head
    components: [lvgl]
    refresh: 1h

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(Added by the PR bot)

[clydebarrow]

Is PPA handled already in LVGL 9.5? Might make sense to just target that, unless there are any showstoppers.

[agillis]

LVGL 9.5 adds some new PPA features such as the ability to fill polygons using PPA. But my code to do screen rotation (or a version of it) would still be required. My goal it to get ESPHome switched over to LVGL 9.x as quickly as possible with as little disrution as possible so we can start using all the new features including PPA. I would be interested in moving to 9.5 but only if we can get there as fast as 9.4. If we can get LVGL 9.x in the next release this would be a huge step forward for ESPHome.