arm64: dts: rockchip: Add frl-enable-gpios to rk3588s-khadas-edge2

The board exposes the GPIO4_B1 pin 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 its dedicated GPIO via frl-enable-gpios to
allow adjusting the bias when transitioning between TMDS and FRL modes.

While at it, remove the duplicated &hdmi0_sound node.

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Link: https://patch.msgid.link/20260428-dts-rk-frl-enable-gpios-v2-7-924df9db884a@collabora.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

diff --git a/arch/arm64/boot/dts/rockchip/rk3588s-khadas-edge2.dts b/arch/arm64/boot/dts/rockchip/rk3588s-khadas-edge2.dts
index 2c22abaf40a82a3a6be60603083c763fec2918f7..5afbc593341ba446cd581a018aa2f9b0ce4dc809 100644 (file)
--- a/arch/arm64/boot/dts/rockchip/rk3588s-khadas-edge2.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3588s-khadas-edge2.dts
@@ -194,6 +194,10 @@
 };
 
 &hdmi0 {
+       frl-enable-gpios = <&gpio4 RK_PB1 GPIO_ACTIVE_LOW>;
+       pinctrl-0 = <&hdmim0_tx0_cec &hdmim0_tx0_hpd
+                    &hdmim0_tx0_scl &hdmim0_tx0_sda &hdmi0_tx_on_h>;
+       pinctrl-names = "default";
        status = "okay";
 };
 
@@ -217,10 +221,6 @@
        status = "okay";
 };
 
-&hdmi0_sound {
-       status = "okay";
-};
-
 &i2c0 {
        pinctrl-names = "default";
        pinctrl-0 = <&i2c0m2_xfer>;
@@ -282,6 +282,12 @@
 };
 
 &pinctrl {
+       hdmi {
+               hdmi0_tx_on_h: hdmi0-tx-on-h {
+                       rockchip,pins = <4 RK_PB1 RK_FUNC_GPIO &pcfg_pull_none>;
+               };
+       };
+
        vdd_sd {
                vdd_sd_en: vdd-sd-en {
                        rockchip,pins = <1 RK_PB6 RK_FUNC_GPIO &pcfg_pull_up>;