drm/scdc-helper: Add scdc_status debugfs entry

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SCDC provides status information on the current display link. At the
very least, it may be useful to expose this info through debugfs.

Add a debugfs entry for it under the connector, which displays a few
more details parsed out of the SCDC registers. A new
drm_scdc_debugfs_init function can be called by the connector
implementation to initialise the debugfs file.

Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@collabora.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
Tested-by: Hans Verkuil <hverkuil+cisco@kernel.org>
Link: https://patch.msgid.link/20260724-scdc-link-health-v9-2-bdda406d016d@collabora.com
Signed-off-by: Daniel Stone <daniels@collabora.com>

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Nicolas Frattaroli 2026-07-24 16:22:37 +02:00 • committed by Daniel Stone

parent ed4a19460f

commit 6c5121962e

2 changed files with 218 additions and 0 deletions

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186

drivers/gpu/drm/display/drm_scdc_helper.c

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32

include/drm/display/drm_scdc_helper.h

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