Add support for the Anbernic RG28XX display panel, as used in the RG28XX
handheld gaming device from Anbernic.

The panel is connected via an RGB parallel interface for image transmission
and an SPI interface for configuration.

Since the current panel driver for the ST7701 variants only supports MIPI
DSI as an interface for configuration, add support for SPI as well.

Hironori KIKUCHI (3):
  dt-bindings: display: st7701: Add Anbernic RG28XX panel
  drm/panel: st7701: Add support for SPI for configuration
  drm/panel: st7701: Add Anbernic RG28XX panel support

 .../display/panel/sitronix,st7701.yaml        |  36 +-
 drivers/gpu/drm/panel/Kconfig                 |   2 +
 drivers/gpu/drm/panel/panel-sitronix-st7701.c | 362 ++++++++++++++++--
 3 files changed, 357 insertions(+), 43 deletions(-)

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2.45.2