lupyuen opened a new pull request, #7846: URL: https://github.com/apache/nuttx/pull/7846
## Summary This PR adds the driver for Allwinner A64's MIPI Display Serial Interface (DSI) and MIPI Display Physical Layer (D-PHY). This driver will be used by the upcoming Display Driver for PINE64 PinePhone. ### Modified Files - `arch/arm64/src/a64/Kconfig`: Added the Kconfig option for "A64 Peripheral Selection > MIPI DSI" (`CONFIG_A64_MIPI_DSI`), which enables the MIPI DSI Driver - `arch/arm64/src/a64/hardware/a64_memorymap.h`: Added the Base Address for MIPI DSI - `arch/arm64/src/a64/Make.defs`: Added the MIPI DSI Driver to the Makefile ### New Files - `arch/arm64/src/a64/mipi_dsi.c`, `mipi_dsi.h`: Compose MIPI DSI Packets (Long, Short, Short with Parameter) - `arch/arm64/src/a64/a64_mipi_dsi.c`, `a64_mipi_dsi.h`: MIPI DSI Driver for Allwinner A64 - `arch/arm64/src/a64/a64_mipi_dphy.c`, `a64_mipi_dphy.h`: MIPI D-PHY Driver for Allwinner A64 ### Updated Documentation - `platforms/arm/a64/boards/pinephone/index.rst`: Added MIPI DSI as supported peripheral for PinePhone ## Impact Our MIPI DSI Driver will be built only when we select the Kconfig option for "A64 Peripheral Selection > MIPI DSI" (`CONFIG_A64_MIPI_DSI`). The MIPI DSI Driver will be called by the upcoming drivers for A64 Timing Controller (TCON) and A64 Display Engine. Our MIPI DSI Driver has no impact on existing code because it's not called yet by the existing code. The Driver Code is derived from my Reverse-Engineering of the PinePhone Display Driver, based on the logs captured from the PinePhone p-boot Bootloader: - ["Understanding PinePhone's Display (MIPI DSI)"](https://lupyuen.github.io/articles/dsi) - ["NuttX RTOS for PinePhone: Display Driver in Zig"](https://lupyuen.github.io/articles/dsi2) ## Testing Some parts of the PinePhone Display Driver are still under construction. To test the MIPI DSI Driver, we ran a Zig Program that integrates the NuttX MIPI DSI Driver with the upcoming parts of the Display Driver: - ["Test MIPI DSI for NuttX Kernel"](https://github.com/lupyuen/pinephone-nuttx#test-mipi-dsi-for-nuttx-kernel) The Integration Test [successfully rendered graphics](https://lupyuen.github.io/images/dsi3-title.jpg) on the LCD Display. Here's the Test Log: - [Test Log for NuttX MIPI DSI on PinePhone](https://gist.github.com/lupyuen/f1a02068aeb0785278c482116a4eedc7) We also ran Unit Tests for the MIPI DSI Driver, [as explained here.](https://github.com/lupyuen/pinephone-nuttx#test-mipi-dsi-for-nuttx-kernel) -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@nuttx.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
