drm/display: hdmi-state-helper: Add source TMDS rate validation

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Validate the computed TMDS character rate against
connector->hdmi.max_tmds_char_rate, when provided by the driver/source.

This gives HDMI connectors common support for rejecting modes whose TMDS
character rate exceeds the source supported limit, while still allowing
drivers with custom validation requirements to implement their own
tmds_char_rate_valid() callback.

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-v11-20-bc12954a0688@collabora.com
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>

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Cristian Ciocaltea 2026-09-01 21:50:44 +03:00

parent 8e5aa7fe23

commit 0f7bb8f4d2

1 changed files with 4 additions and 0 deletions

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drivers/gpu/drm/display/drm_hdmi_state_helper.c

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