From: Chris Morgan macromorgan@hotmail.com
Add support for panel auto detection for the Anbernic RGxx3 series. This requires us to probe the DSI and DSI-DPHY controllers so that we may send a MIPI_DCS_GET_DISPLAY_ID command to the panel to find out which panel we are running. This requires creating a kind of "skeleton" driver for the panel so we have just enough information about it to issue the necessary command.
Once the panel type is determined the panel type is saved as an environment variable, and additionally the panel compatible string is automatically fixed-up in the devicetree if it is found to be incompatible. There is a table of panel IDs and compatible strings, support for a new panel only requires knowing the ID and the string.
Additionally, the device auto detection was changed so that it mimicks the panel auto detection, requiring only defining a few new values to add support for a new compatible board. This is done while also adding a new board, the RG353PS.
Tested the auto detection on an RG353P, RG353PS (2nd revision panel), RG353V, RG353V (2nd revision panel), RG353M, and RG503. As long as the correct devicetrees were located in ${boot}/rockchip/. U-Boot was able to automatically detect the correct board and panel and boot each device correctly.
Changes since V1: - Split into multiple patches to make it easier to digest. - Updated documentation to note panel detection is now working.
Chris Morgan (6): board: rockchip: Correct i2c2 pinctrl for RGxx3 board: rockchip: add DSI and DSI-DPHY for Anbernic RGxx3 board: rockchip: Add support for RG353PS to RGxx3 board: rockchip: Add panel auto-detection for Anbernic RGxx3 configs: Update anbernic-rgxx3_defconfig for panel detection doc: anbernic: Update RGxx3 Docs for panel detection
.../arm/dts/rk3566-anbernic-rgxx3-u-boot.dtsi | 10 + board/anbernic/rgxx3_rk3566/rgxx3-rk3566.c | 322 +++++++++++++++--- configs/anbernic-rgxx3_defconfig | 15 + doc/board/anbernic/rgxx3.rst | 31 +- 4 files changed, 327 insertions(+), 51 deletions(-)