[PATCH 05/40] arm64: dts: rockchip: Add frl-enable-gpios to rk3576-luckfox-core3576

[Cristian Ciocaltea]

The board exposes the GPIO4_C6 line 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 the GPIO line using the frl-enable-gpios
property and drop the line from the vcc_5v0_hdmi regulator 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/rk3576-luckfox-core3576.dtsi | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3576-luckfox-core3576.dtsi b/arch/arm64/boot/dts/rockchip/rk3576-luckfox-core3576.dtsi
index 749f0a54b478..93ae37699366 100644
--- a/arch/arm64/boot/dts/rockchip/rk3576-luckfox-core3576.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3576-luckfox-core3576.dtsi
@@ -140,10 +140,7 @@ regulator-state-mem {
 
 	vcc_5v0_hdmi: regulator-vcc-5v0-hdmi {
 		compatible = "regulator-fixed";
-		enable-active-high;
-		gpios = <&gpio4 RK_PC6 GPIO_ACTIVE_HIGH>;
-		pinctrl-names = "default";
-		pinctrl-0 = <&hdmi_con_en>;
+		regulator-always-on;
 		regulator-min-microvolt = <5000000>;
 		regulator-max-microvolt = <5000000>;
 		regulator-name = "vcc_5v0_hdmi";
@@ -231,6 +228,8 @@ &gpu {
 };
 
 &hdmi {
+	pinctrl-0 = <&hdmi_txm0_pins &hdmi_tx_scl &hdmi_tx_sda &hdmi_frl_en>;
+	frl-enable-gpios = <&gpio4 RK_PC6 GPIO_ACTIVE_LOW>;
 	status = "okay";
 };
 
@@ -655,7 +654,7 @@ &pcie0 {
 
 &pinctrl {
 	hdmi {
-		hdmi_con_en: hdmi-con-en {
+		hdmi_frl_en: hdmi-frl-en {
 			rockchip,pins = <4 RK_PC6 RK_FUNC_GPIO &pcfg_pull_none>;
 		};
 	};

-- 
2.53.0