Hi Jani, On Fri, Jun 28, 2024 at 10:45:48AM +0300, Jani Nikula wrote: > Might be helpful to actually point at the source code or commits or > something. The source code is here: drivers/gpu/drm/panel/panel-newvision-nv3052c.c It's just a standard MIPI DBI panel. It reports using an RGB888 bus format. > Maybe look at include/uapi/drm/drm_fourcc.h, and how the DRM_FORMAT_* > macros are used. > > Can't help you with device tree, but maybe this gives you pointers to > other places for examples. Currently it works like this: - DRM uses 24-bit depth - CRTC puts out a 24-bit signal - This gets output over LCD pins - The PCB drops 2 bits per channel by wiring 6 pins to GND - The panel is told to only use 18 bits Getting DRM to use MEDIA_BUS_FMT_RGB666_1X18 would be nice and allow the panel to auto-detect which bits to use. But the bus format is set in the panel :( Where is the bus format usually set for cases where a board only supports a physical format? > HTH, > Jani. > > > -- > Jani Nikula, Intel John.
