Documentaion: migrate graphics/lvgl readme

Documentation/applications/graphics/index.rst

@@ -2,10 +2,16 @@
 Graphics Support
 ================
 
+.. toctree::
+   :glob:
+   :maxdepth: 3
+   :titlesonly:
+   
+   */*
+
 - ft80x - FTDI/BridgeTek FT80x library
 - libjpeg - libjpeg JPEG image encoding
 - libyuv - libyuv
-- lvgl - Light and Versatile Graphic Library (LVGL)
 - nxwidgets - NxWidgets
 - nxwm - NuttX Tiny Window Manager (NxWM)
 - pdcurs34 - pdcurses Text User Interface (TUI)

Documentation/applications/graphics/lvgl/index.rst

@@ -0,0 +1,27 @@
+====
+LVGL
+====
+
+Usage
+-----
+
+Import with ``#include <lvgl/lvgl.h>`` or ``#include <lvgl.h>``.
+
+Upstream example ported to NuttX is present at ``examples/lvgldemo``.
+
+LVGL can be used with framebuffer device. To find example boards with this
+preconfigured, search for ``CONFIG_GRAPHICS_LVGL=y`` in ``defconfig`` files. All of
+them have also ``CONFIG_VIDEO_FB=y`` present.
+
+As a second option, LVGL can talk to a display driver and explicitly draw line
+by line. For this case, there is no preconfigured board present. Go to _Porting_
+section of upstream documentation for more hints.
+
+Resources
+---------
+
+- `API documentation with examples <https://docs.lvgl.io/latest/en/html/index.html>`_
+- `GitHub / LVGL / LVGL library <https://github.com/lvgl/lvgl>`_
+- `GitHub / LVGL / Examples, tutorials, applications <https://github.com/lvgl/lv_examples>`_
+- `GitHub / LVGL / Desktop simulator <https://github.com/lvgl/lv_sim_eclipse_sdl>`_
+- `GitHub / LVGL / Web simulator <https://github.com/lvgl/lv_sim_emscripten>`_