diff options
| author | Cristian Ciocaltea <cristian.ciocaltea@collabora.com> | 2025-10-28 01:26:40 +0300 |
|---|---|---|
| committer | Heiko Stuebner <heiko@sntech.de> | 2025-11-15 00:52:48 +0300 |
| commit | ca408d8d93d33423cafe3046f40bcc81bc6ee5f3 (patch) | |
| tree | 0ddef910650396318915ff6dd8132f4a60767353 /Documentation | |
| parent | 2e1fe44e06e3f5ac234190a6680d6cd8147f3083 (diff) | |
| download | linux-ca408d8d93d33423cafe3046f40bcc81bc6ee5f3.tar.xz | |
dt-bindings: display: rk3588-dw-hdmi-qp: Add frl-enable-gpios property
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
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/display/rockchip/rockchip,rk3588-dw-hdmi-qp.yaml | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/display/rockchip/rockchip,rk3588-dw-hdmi-qp.yaml b/Documentation/devicetree/bindings/display/rockchip/rockchip,rk3588-dw-hdmi-qp.yaml index 96b4b088eebe..d649808c59da 100644 --- a/Documentation/devicetree/bindings/display/rockchip/rockchip,rk3588-dw-hdmi-qp.yaml +++ b/Documentation/devicetree/bindings/display/rockchip/rockchip,rk3588-dw-hdmi-qp.yaml @@ -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>; |