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module: LVGL: Improve support for hardware display rotation #73556

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wants to merge 4 commits into from
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module: LVGL: Improve support for hardware display rotation #73556

wants to merge 4 commits into from

Commits on May 31, 2024

  1. drivers: display: dummy: Add rotation property 

    Adds the rotation property to the dummy display binding to allow for
setting an initial rotation within tests.

Signed-off-by: Fabian Blatz <fabianblatz@gmail.com>
    @faxe1008
    faxe1008 committed May 31, 2024
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  2. modules: lvgl: Add lvgl_reload_display_capabilities 

    Add a method which allows for syncing information within the
display_data struct after the display has been rotated in the
application using `display_set_orientation`. This also makes the
implementation of various input devices unit testable without requiring
a lot of overlay files.

After the current implementation is verified
against unit tests, the reload method will additionally set the
`rotated` flag on the display driver. The LVGL code will then
handle the translation of input devices points to points in the GUI
according to the display rotation.

Signed-off-by: Fabian Blatz <fabianblatz@gmail.com>
    @faxe1008
    faxe1008 committed May 31, 2024
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  3. tests: lib: gui: Add tests for lvgl input devices 

    Adds a test for lvgl input devices in various configurations, like
rotated display, pointer inversions etc.

Signed-off-by: Fabian Blatz <fabianblatz@gmail.com>
    @faxe1008
    faxe1008 committed May 31, 2024
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  4. modules: lvgl: Sync display rotation to LVGL 

    LVGL supports the `rotated` flag on its display drivers. It is used
during input device coordinate processing to translate the physical
touch points to the points in (rendered) GUI space. Previously this was
done by the Zephyr gluecode on system init. With this change it is now
possible to perform runtime rotation of the display, the
`lvgl_reload_display_capabilities` method should be called right after
`display_set_orientation`.

Signed-off-by: Fabian Blatz <fabianblatz@gmail.com>
    @faxe1008
    faxe1008 committed May 31, 2024
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