[GitHub] [nuttx] lupyuen opened a new pull request, #8006: arm64/pinephone: Fix missing pixels in Frame Buffer Driver

[GitBox <gi...@apache.org>]

lupyuen opened a new pull request, #8006:
URL: https://github.com/apache/nuttx/pull/8006

   ## Summary
   
   This PR fixes the missing pixels in the rendered output of the Frame Buffer Driver for PINE64 PinePhone.
   
   We fix this by copying the RAM Frame Buffer to itself on Frame Buffer Update `FBIO_UPDATE`, which will refresh the display correctly over DMA / Display Engine / Timing Controller TCON0.
   
   ### Modified Files
   
   `boards/arm64/a64/pinephone/Kconfig`: Add requirement for Frame Buffer Update `FB_UPDATE` for PinePhone LCD Display
   
   `boards/arm64/a64/pinephone/src/pinephone_display.c`: Implement Frame Buffer Update `FBIO_UPDATE` by copying the RAM Frame Buffer to itself
   
   ## Impact
   
   With this PR, NuttX Apps will be able to render images correctly with the Frame Buffer API without missing pixels.
   
   ## Testing
   
   We tested the Frame Buffer Driver with the `fb` Example App. We modified `CONFIG_FB_OVERLAY` in the app as explained here: https://github.com/apache/nuttx/pull/7988
   
   Before Fixing: `fb` app renders an image with missing Red, Orange and Yellow pixels. [(See this)](https://lupyuen.github.io/images/fb-test2.jpg)
   
   After Fixing: `fb` app renders the Red, Orange and Yellow boxes correctly. [(See this)](https://lupyuen.github.io/images/fb-test3.jpg)
   
   [(See the Test Log)](https://gist.github.com/lupyuen/474b0546f213c25947105b6a0daa7c5b)
   
   The Frame Buffer Driver also renders the `lvgldemo` Example App correctly. [(See this)](https://lupyuen.github.io/images/fb-lvgl.jpg)
   
   [(See the LVGL Settings)](https://github.com/lupyuen/pinephone-nuttx#lvgl-on-nuttx-on-pinephone)


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[GitHub] [nuttx] xiaoxiang781216 merged pull request #8006: arm64/pinephone: Fix missing pixels in Frame Buffer Driver

[GitBox <gi...@apache.org>]

xiaoxiang781216 merged PR #8006:
URL: https://github.com/apache/nuttx/pull/8006


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