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dt-bindings: display: rk3588-dw-hdmi-qp: Add frl-enable-gpios property

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Add an optional property to RK3588 HDMI TX Controller binding describing
a GPIO line to be asserted when operating in HDMI 2.1 FRL mode and
deasserted for HDMI 1.4/2.0 TMDS.

This is used to control an external voltage bias for HDMI data lines.

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Co-developed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://lore.kernel.org/r/20251027222641.25066-2-laurent.pinchart@ideasonboard.com
This commit is contained in:
Cristian Ciocaltea 2025-10-28 00:26:40 +02:00 committed by Heiko Stuebner
parent 2e1fe44e06
commit ca408d8d93
1 changed files with 11 additions and 0 deletions
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11
Documentation/devicetree/bindings/display/rockchip/rockchip,rk3588-dw-hdmi-qp.yaml
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@ -113,6 +113,14 @@ properties:
description:
Additional HDMI QP related data is accessed through VO GRF regs.
frl-enable-gpios:
description:
Optional GPIO line to be asserted when operating in HDMI 2.1 FRL mode and
deasserted for HDMI 1.4/2.0 TMDS. It can be used to control external
voltage bias for HDMI data lines. When not present the HDMI encoder will
operate in TMDS mode only.
maxItems: 1
required:
- compatible
- reg
@ -132,8 +140,10 @@ unevaluatedProperties: false
examples:
- |
#include <dt-bindings/clock/rockchip,rk3588-cru.h>
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/interrupt-controller/arm-gic.h>
#include <dt-bindings/interrupt-controller/irq.h>
#include <dt-bindings/pinctrl/rockchip.h>
#include <dt-bindings/power/rk3588-power.h>
#include <dt-bindings/reset/rockchip,rk3588-cru.h>
@ -164,6 +174,7 @@ examples:
rockchip,grf = <&sys_grf>;
rockchip,vo-grf = <&vo1_grf>;
#sound-dai-cells = <0>;
frl-enable-gpios = <&gpio4 RK_PB1 GPIO_ACTIVE_LOW>;
ports {
#address-cells = <1>;