On 9/28/21 10:55 AM, Guido Günther wrote:
If a bridge doesn't do any bus format handling MEDIA_BUS_FMT_FIXED is returned. Fallback to a reasonable default (MEDIA_BUS_FMT_RGB888_1X24) in that case.This unbreaks e.g. using mxsfb with the nwl bridge and mipi panels. Fixes: b776b0f00f24 ("drm: mxsfb: Use bus_format from the nearest bridge if present") Signed-off-by: Guido Günther <a...@sigxcpu.org> --- I'll look at what needs to be done in nwl separately but this also unbreaks other bridge seupts that don't to format negotiation yet. drivers/gpu/drm/mxsfb/mxsfb_kms.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/mxsfb/mxsfb_kms.c b/drivers/gpu/drm/mxsfb/mxsfb_kms.c index af6c620adf6e..4ef94cf686b0 100644 --- a/drivers/gpu/drm/mxsfb/mxsfb_kms.c +++ b/drivers/gpu/drm/mxsfb/mxsfb_kms.c @@ -369,6 +369,8 @@ static void mxsfb_crtc_atomic_enable(struct drm_crtc *crtc, drm_atomic_get_new_bridge_state(state, mxsfb->bridge); bus_format = bridge_state->input_bus_cfg.format; + if (bus_format == MEDIA_BUS_FMT_FIXED) + bus_format = MEDIA_BUS_FMT_RGB888_1X24;
Shouldn't the NWL bridge return the correct format ?
