drm/display: hdmi-state-helper: Sync SCDC state on hotplug

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drm_atomic_helper_connector_hdmi_hotplug() does not currently
synchronize SCDC status on hotplug events, leaving the scrambler state
potentially inconsistent after (re)connect.

Hook drm_connector_hdmi_sync_scdc() into both the connect and disconnect
paths, replacing the existing TODOs around missing scrambler handling.
Note that per .detect_ctx() contract, implementations shall return a
drm_connector_status value or -EDEADLK, nothing else.  Therefore, handle
deadlocks and just report any other errors.  For consistency, also
report the errors from drm_edid_connector_update().

Tested-by: Maud Spierings <maud_spierings@hotmail.com>
Tested-by: Diederik de Haas <diederik@cknow-tech.com>  # NanoPC-T6 LTS, Rock 5B
Reviewed-by: Maxime Ripard <mripard@kernel.org>
Tested-by: Igor Paunovic <royalnet026@gmail.com> # RK3588 Orange Pi 5 Plus, dual HDMI
Tested-by: Robin Räber <robin.raebi@gmail.com>
Link: https://patch.msgid.link/20260901-dw-hdmi-qp-scramb-v11-23-bc12954a0688@collabora.com
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>

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This commit is contained in:

Cristian Ciocaltea 2026-09-01 21:50:47 +03:00

parent 8ed0167d56

commit 6867cd55ee

1 changed files with 31 additions and 3 deletions

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drivers/gpu/drm/display/drm_hdmi_state_helper.c

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