commit b776b0f00f24 ("drm: mxsfb: Use bus_format from the nearest bridge if present") added bus format probing to mxsfb this exposed several issues in the display stack as used on the Librem 5:
The nwl bridge and the panels didn't bother to set any media bus formats and in that case mxsfb would not pick a reasonable default. This series aims to fix this.
This series includes the patch from https://lore.kernel.org/dri-devel/YVLYh%2FSgBritG%2FRJ@qwark.sigxcpu.org/ with a `dev_warn` added.
The patches are against 5.15-rc3. I've marked a single patch with a 'fixes' which is enough to unbreak the display stack in 5.15.
Guido Günther (5): drm: mxsfb: Print failed bus format in hex drm: mxsfb: Set proper default bus format when using a bridge drm/bridge: nwl-dsi: Add atomic_get_input_bus_fmts drm/panel: mantix: Add media bus format drm/panel: st7703: Add media bus format
drivers/gpu/drm/bridge/nwl-dsi.c | 35 +++++++++++++++++++ drivers/gpu/drm/mxsfb/mxsfb_kms.c | 7 +++- .../gpu/drm/panel/panel-mantix-mlaf057we51.c | 9 +++++ drivers/gpu/drm/panel/panel-sitronix-st7703.c | 8 +++++ 4 files changed, 58 insertions(+), 1 deletion(-)