Add PPA hardware-accelerated rotation for 90/270 degrees on ESP32-P4#140
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agillis wants to merge 3 commits intoclydebarrow:lvgl-9.4from
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Add PPA hardware-accelerated rotation for 90/270 degrees on ESP32-P4#140agillis wants to merge 3 commits intoclydebarrow:lvgl-9.4from
agillis wants to merge 3 commits intoclydebarrow:lvgl-9.4from
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Add hardware-accelerated rotation using the ESP32-P4 PPA (Pixel Processing Accelerator) engine instead of software rotation. Falls back to software rotation on non-P4 platforms or if PPA registration fails. Key changes: - Use PPA SRM (Scale-Rotate-Mirror) operations for 90/180/270 degree rotation - Allocate DMA-compatible cache-line-aligned buffers for PPA compatibility - Register PPA client during setup with automatic fallback to software rotation
180-degree rotation can be handled natively by the display driver, so PPA hardware acceleration is only needed for 90 and 270 degrees.
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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/140/head
components: [lvgl]
refresh: 1h(Added by the PR bot) |
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What does this implement/fix?
Adds ESP32-P4 PPA (Pixel Processing Accelerator) hardware-accelerated screen rotation for 90° and 270° display orientations in the LVGL component.
The ESP32-P4's PPA SRM (Scale-Rotate-Mirror) engine performs the pixel rotation in hardware, which is significantly faster than software rotation. When PPA is not available or for 0°/180° rotations (handled natively by the display driver), the existing software fallback is used.
Changes:
draw_buffer_()for 90°/270° cases with software fallback for all angles. Added aligned buffer allocation and PPA client registration insetup().ppa_client_androtate_buf_size_members under#ifdef USE_ESP32_VARIANT_ESP32P4.Dependencies:
This PR targets clydebarrow's
lvgl-9.4branch (PR esphome#12312 on esphome/esphome).Test Environment: