RK3588 配置HDMI支持8K分辨率输出

只看该作者 · 2022-6-10 16:14

RK3588 芯片最高支持的输出分辨率可以到8K，由于Android12 SDK要支持多个显示接口，所以默认最高只配置了4K的分辨率支持，下面以RK3588-EVB1的开发板上配置HDMI输出8K输出为例进行说明如何让RK3588支持8K分辨率。本文配置RK3588-EVB1开发HDMI0接口输出8K分辨率。

一、提供VOP CLK以支持8K分辨率

提cru ACLK_VOP的频率到800MHz

diff --gita/arch/arm64/boot/dts/rockchip/rk3588s.dtsib/arch/arm64/boot/dts/rockchip/rk3588s.dtsi

index 2704255b0ca23..1fcb10641dc3e 100644

---a/arch/arm64/boot/dts/rockchip/rk3588s.dtsi

+++b/arch/arm64/boot/dts/rockchip/rk3588s.dtsi

cru: clock-controller@fd7c0000 {

compatible ="rockchip,rk3588-cru";

rockchip,grf =<&php_grf>;

reg = <0x0 0xfd7c0000 0x00x5c000>;

#clock-cells = <1>;

#reset-cells = <1>;

assigned-clocks =

<&cruPLL_PPLL>, <&cru PLL_AUPLL>,

<&cruPLL_NPLL>, <&cru PLL_GPLL>,

<&cruACLK_CENTER_ROOT>,

<&cru HCLK_CENTER_ROOT>,<&cru ACLK_CENTER_LOW_ROOT>,

<&cruACLK_TOP_ROOT>, <&cru PCLK_TOP_ROOT>,

<&cruACLK_LOW_TOP_ROOT>, <&cru PCLK_PMU0_ROOT>,

<&cruHCLK_PMU_CM0_ROOT>, <&cru ACLK_VOP>,

<&cruACLK_BUS_ROOT>, <&cru CLK_150M_SRC>,

<&cruCLK_GPU>;

assigned-clock-rates =

<100000000>,<786432000>,

<850000000>,<1188000000>,

<702000000>,

<400000000>,<500000000>,

<800000000>,<100000000>,

<400000000>,<100000000>,

- <200000000>,<500000000>,

+ <200000000>, <800000000>,

<375000000>,<150000000>,

<200000000>;

};

二、修改VOP的图层分配

RK3588的有4个vop port分别支持4K+4K+4K+1080P（关于VOP的详细介绍可以参考文档Rockchip RK3588 kernel dts解析之显示模块）,如果需要支持8K需要把vp0和vp1组合使用，这里只需要把HDMI0分配到vp0上，vp1不分配给其他接口即可，因为SDK中的RK3588-EVB1的dts中HMDI1配置在vp1上面，所以需要把HMDI1改为配置在vp2上面，这样即可空出vp1给HMDI0做8K显示用。

diff --gita/arch/arm64/boot/dts/rockchip/rk3588-evb1-lp4.dtsib/arch/arm64/boot/dts/rockchip/rk3588-evb1-lp4.dtsi

index 543d78d3f182f..4f4f4b5f01eab 100644

---a/arch/arm64/boot/dts/rockchip/rk3588-evb1-lp4.dtsi

+++b/arch/arm64/boot/dts/rockchip/rk3588-evb1-lp4.dtsi

@@ -360,8 +360,8 @@

status = "okay";

};

-&hdmi1_in_vp1 {

- status = "okay";

+&hdmi1_in_vp2 {

+ status = "dokay";

};