Revert "ARM: dts: rockchip: drop grf reference from rk3036 hdmi"

This reverts commit 1580ccb6ed9dc76b8ff3e2d8912e8215c8b0fa6d.

The HSYNC/VSYNC polarity of rk3036 HDMI are controlled by GRF.
Without the polarity configuration in GRF, it can be observed from
the HDMI protocol analyzer that the H/V front/back timing output
by RK3036 HDMI are currently not in line with the specifications.

Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
Tested-by: Heiko Stuebner <heiko@sntech.de> #rk3036-kylin
Link: https://lore.kernel.org/r/20250422070455.432666-7-andyshrk@163.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

diff --git a/arch/arm/boot/dts/rockchip/rk3036.dtsi b/arch/arm/boot/dts/rockchip/rk3036.dtsi
index 2c0c0a9e4a64e08f4e289570cb3de5f24fba6b7a..f4292b586bc215e00b0503aa0e7bc2220fbd7cc4 100644 (file)
--- a/arch/arm/boot/dts/rockchip/rk3036.dtsi
+++ b/arch/arm/boot/dts/rockchip/rk3036.dtsi
@@ -400,6 +400,7 @@
                interrupts = <GIC_SPI 45 IRQ_TYPE_LEVEL_HIGH>;
                clocks = <&cru PCLK_HDMI>, <&cru SCLK_LCDC>;
                clock-names = "pclk", "ref";
+               rockchip,grf = <&grf>;
                pinctrl-names = "default";
                pinctrl-0 = <&hdmi_ctl>;
                #sound-dai-cells = <0>;