HDMI

介绍HDMI的功能和使用方法。

提供 1 个 HDMI 接口，支持 HDMI1.4，支持最高 1080P@60FPS

pinctrl

支持两组 hdmi pinctrl: pinctrl_hdmi_0 和 pinctrl_hdmi_1，仅可选择其中任意一组。

pinctrl_hdmi_0: hdmi_0_grp {
    pinctrl-single,pins = <
        K1X_PADCONF(GPIO_86, MUX_MODE1, (EDGE_NONE | PULL_UP | PAD_1V8_DS2))         /* hdmi_tx_hscl */
        K1X_PADCONF(GPIO_87, MUX_MODE1, (EDGE_NONE | PULL_UP | PAD_1V8_DS2))         /* hdmi_tx_hsda */
        K1X_PADCONF(GPIO_88, MUX_MODE1, (EDGE_NONE | PULL_DOWN | PAD_1V8_DS2))       /* hdmi_tx_hcec */
        K1X_PADCONF(GPIO_89, MUX_MODE1, (EDGE_NONE | PULL_DOWN | PAD_1V8_DS2))       /* hdmi_tx_pdp */
    >;
};

pinctrl_hdmi_1: hdmi_1_grp {
    pinctrl-single,pins = <
        K1X_PADCONF(GPIO_59, MUX_MODE1, (EDGE_NONE | PULL_UP | PAD_1V8_DS2))         /* hdmi_tx_hscl */
        K1X_PADCONF(GPIO_60, MUX_MODE1, (EDGE_NONE | PULL_UP | PAD_1V8_DS2))         /* hdmi_tx_hsda */
        K1X_PADCONF(GPIO_61, MUX_MODE1, (EDGE_NONE | PULL_UP | PAD_1V8_DS2))         /* hdmi_tx_hcec */
        K1X_PADCONF(GPIO_62, MUX_MODE1, (EDGE_NONE | PULL_UP | PAD_1V8_DS2))         /* hdmi_tx_pdp */
    >;
};

dts 配置

HDMI 相关配置内容在 k1-x-hdmi.dtsi，包括 irq, clock 及 power domain 相关配置。

display-subsystem-hdmi {
        compatible = "spacemit,saturn-hdmi";
        reg = <0 0xc0440000 0 0x2A000>;
        ports = <&dpu_online2_hdmi>;
};

dpu_online2_hdmi: port@c0440000 {
        compatible = "spacemit,dpu-online2";
        interrupt-parent = <&intc>;
        interrupts = <139>, <138>;
        interrupt-names = "ONLINE_IRQ", "OFFLINE_IRQ";
        clocks = <&ccu CLK_HDMI>;
        clock-names = "hmclk";
        assigned-clocks = <&ccu CLK_HDMI>;
        assigned-clock-parents = <&ccu CLK_PLL1_491>;
        assigned-clock-rates = <491520000>;
        resets = <&reset RESET_HDMI>;
        reset-names= "hdmi_reset";
        power-domains = <&power K1X_PMU_HDMI_PWR_DOMAIN>;
        pipeline-id = <ONLINE2>;
        ip = "spacemit-saturn";
        status = "disabled";

        dpu_online2_hdmi_out: endpoint@0 {
                remote-endpoint = <&hdmi_in>;
        };
};

hdmi: hdmi@C0400500 {
        compatible = "spacemit,hdmi";
        reg = <0 0xC0400500 0 0x200>;
        status = "disabled";

        port {
                #address-cells = <1>;
                #size-cells = <0>;
                hdmi_in: endpoint@0 {
                        reg = <0>;
                        remote-endpoint = <&dpu_online2_hdmi_out>;
                };
        };
};

默认关闭 HDMI 功能，在方案配置文件中选择是否打开

&dpu_online2_hdmi {
        memory-region = <&dpu_resv>;
        status = "okay";
};

&hdmi{
        pinctrl-names = "default";
        pinctrl-0 = <&pinctrl_hdmi_0>;
        status = "okay";
};