[PATCH 0/5] drm/ingenic: Add the X1600 LCD controller and the HiBy R1 panel

[Olivier Louvignes]

The display controller of the Ingenic X1600 is not the one ingenic-drm
drives: it fetches frames through descriptors and keeps its interface and
timings in register blocks of their own. It is the X2000's controller
without the composer. This series adds a binding and a driver for it,
then the panel of the HiBy R1, an X1600 audio player: 480x800 parallel
RGB, set up over a 3-wire SPI bus.

The driver covers what the R1 uses and what could be tested: parallel RGB
panels on a 24-bit bus and one full-screen RGB565 plane. The composer,
smart panels and other pixel formats are left out.

Two things come from the vendor kernel rather than the manual. A flip
also writes SRD_CHAIN_START, which the manual doesn't describe for a
running controller; flips without it were not tried. The panel's set-up
sequence is the vendor's too: HiBy calls the panel LG35583, its maker and
controller are unknown, hence the hiby prefix.

Tested on a HiBy R1: the fbdev console and a player drawing through
fbdev, blanking and unblanking, 60 page flips in 0.97 s at about 61 Hz,
and the colour order (RGB order swaps red and blue on this panel).

The X1600 has no device tree upstream yet; its support is being posted
one subsystem at a time. The R1's backlight uses the X1600 PWM driver
posted separately:
https://lore.kernel.org/r/20261025084643.93167-1-olivier@xxxxxxxxx

Olivier Louvignes (5):
  dt-bindings: vendor-prefixes: Add HiBy
  dt-bindings: display: Add the Ingenic X1600 LCD controller
  drm/ingenic: Add a driver for the X1600 LCD controller
  dt-bindings: display: panel: Add the HiBy LG35583
  drm/panel: Add the HiBy LG35583

 .../bindings/display/ingenic,x1600-lcd.yaml   |  70 ++
 .../bindings/display/panel/hiby,lg35583.yaml  |  71 ++
 .../devicetree/bindings/vendor-prefixes.yaml  |   2 +
 MAINTAINERS                                   |  12 +
 drivers/gpu/drm/Makefile                      |   1 +
 drivers/gpu/drm/ingenic/Kconfig               |  22 +
 drivers/gpu/drm/ingenic/Makefile              |   1 +
 drivers/gpu/drm/ingenic/ingenic-x1600-drm.c   | 694 ++++++++++++++++++
 drivers/gpu/drm/panel/Kconfig                 |  10 +
 drivers/gpu/drm/panel/Makefile                |   1 +
 drivers/gpu/drm/panel/panel-hiby-lg35583.c    | 342 +++++++++
 11 files changed, 1226 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/ingenic,x1600-lcd.yaml
 create mode 100644 Documentation/devicetree/bindings/display/panel/hiby,lg35583.yaml
 create mode 100644 drivers/gpu/drm/ingenic/ingenic-x1600-drm.c
 create mode 100644 drivers/gpu/drm/panel/panel-hiby-lg35583.c


base-commit: cf61bef3801c3c9d0d8c39026b7b2fb242898a3a
-- 
2.39.5