drm/scdc-helper: Implement parsing and printing HDMI 2.1 fields

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HDMI 2.1 redefines previously reserved fields in SCDC for various new
uses. No version check needs to be performed, as an HDMI 2.0 sink's
reserved SCDC fields are well-defined to be 0, and any zero-ness of
these fields for an HDMI 2.0 sink is not a surprise for SCDC parsers for
HDMI 2.1.

Implement reading and outputting these fields over debugfs.

Reviewed-by: Maxime Ripard <mripard@kernel.org>
Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@collabora.com>
Tested-by: Hans Verkuil <hverkuil+cisco@kernel.org>
Link: https://patch.msgid.link/20260724-scdc-link-health-v9-3-bdda406d016d@collabora.com
Signed-off-by: Daniel Stone <daniels@collabora.com>

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Nicolas Frattaroli 2026-07-24 16:22:38 +02:00 • committed by Daniel Stone

parent 6c5121962e

commit c8faf89e97

3 changed files with 185 additions and 8 deletions

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103

drivers/gpu/drm/display/drm_scdc_helper.c

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21

include/drm/display/drm_scdc.h

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69

include/drm/display/drm_scdc_helper.h

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