[PATCH 28/40] arm64: dts: rockchip: Add frl-enable-gpios to rk3588-tiger

[Cristian Ciocaltea]

The board exposes the GPIO0_D3 line to control the voltage bias on the
HDMI0 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 HDMI0 node to the GPIO line using the frl-enable-gpios
property to allow adjusting the bias when transitioning between TMDS and
FRL operating modes.

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea at collabora.com>
---
 arch/arm64/boot/dts/rockchip/rk3588-tiger-haikou.dts | 3 ++-
 arch/arm64/boot/dts/rockchip/rk3588-tiger.dtsi       | 9 ++++++++-
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3588-tiger-haikou.dts b/arch/arm64/boot/dts/rockchip/rk3588-tiger-haikou.dts
index caa43d1abf17..8401f7bebe86 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-tiger-haikou.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3588-tiger-haikou.dts
@@ -173,7 +173,8 @@ &hdmi0 {
 	 * connected on Haikou itself.
 	 */
 	pinctrl-names = "default";
-	pinctrl-0 = <&hdmim0_tx0_hpd &hdmim1_tx0_scl &hdmim1_tx0_sda>;
+	pinctrl-0 = <&hdmim0_tx0_hpd &hdmim1_tx0_scl &hdmim1_tx0_sda
+		     &hdmi0_frl_en>;
 	status = "okay";
 };
 
diff --git a/arch/arm64/boot/dts/rockchip/rk3588-tiger.dtsi b/arch/arm64/boot/dts/rockchip/rk3588-tiger.dtsi
index a0e97481afb7..ea0be7b6c935 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-tiger.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3588-tiger.dtsi
@@ -150,7 +150,8 @@ &gpu {
 &hdmi0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&hdmim1_tx0_cec &hdmim0_tx0_hpd &hdmim1_tx0_scl
-		     &hdmim1_tx0_sda>;
+		     &hdmim1_tx0_sda &hdmi0_frl_en>;
+	frl-enable-gpios = <&gpio0 RK_PD3 GPIO_ACTIVE_LOW>;
 };
 
 &i2c1 {
@@ -349,6 +350,12 @@ eth_reset: eth-reset {
 		};
 	};
 
+	hdmi {
+		hdmi0_frl_en: hdmi0-frl-en {
+			rockchip,pins = <0 RK_PD3 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
+
 	leds {
 		module_led_pin: module-led-pin {
 			rockchip,pins = <1 RK_PD3 RK_FUNC_GPIO &pcfg_pull_none>;

-- 
2.53.0