arm64: dts: rockchip: Add frl-enable-gpios to rk3576-nanopi-r76s

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The board exposes the GPIO4_C6 pin to control the voltage bias on the
HDMI data lines.  It must be asserted when operating in HDMI 2.1 FRL
mode and deasserted for HDMI 1.4/2.0 TMDS mode.

Wire up the hdmi node to its dedicated GPIO via frl-enable-gpios to
allow adjusting the bias when transitioning between TMDS and FRL modes.

Additionally, drop the now unnecessary workaround of using vcc5v_hdmi_tx
as hdmi-pwr-supply solely to drive the GPIO into its default state.

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Link: https://patch.msgid.link/20260428-dts-rk-frl-enable-gpios-v2-3-924df9db884a@collabora.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

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Cristian Ciocaltea 2026-04-28 00:57:21 +03:00 • committed by Heiko Stuebner

parent 12eb09ee67

commit ba0d7cfb98

1 changed files with 3 additions and 13 deletions

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arch/arm64/boot/dts/rockchip/rk3576-nanopi-r76s.dts

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