[PATCH v1 2/5] drm: mxsfb: Set proper default bus format when using a bridge
flat view
STALE1829d
From: Guido Günther <agx@sigxcpu.org>
Date: 2021-09-28 12:16:39
Also in:
dri-devel, lkml
Subsystem:
drm drivers, drm drivers and misc gpu patches, mxsfb drm driver, the rest · Maintainers:
David Airlie, Simona Vetter, Maarten Lankhorst, Maxime Ripard, Thomas Zimmermann, Marek Vasut, Stefan Agner, Linus Torvalds
Revision v1 of 3 in this series.
Revisions (3)
- v1 current
- v2 [diff vs current]
- v3 [diff vs current]
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")
Reported-by: Martin Kepplinger <martink@posteo.de>
Signed-off-by: Guido Günther <agx@sigxcpu.org>
---
drivers/gpu/drm/mxsfb/mxsfb_kms.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/gpu/drm/mxsfb/mxsfb_kms.c b/drivers/gpu/drm/mxsfb/mxsfb_kms.c
index d6abd2077114..f4be16f5c20b 100644
--- a/drivers/gpu/drm/mxsfb/mxsfb_kms.c
+++ b/drivers/gpu/drm/mxsfb/mxsfb_kms.c@@ -369,6 +369,11 @@ 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) { + dev_warn_once(drm->dev, + "Bridge does not provide bus format. Please fix."); + bus_format = MEDIA_BUS_FMT_RGB888_1X24; + } } /* If there is no bridge, use bus format from connector */
--
2.33.0
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