Kernel-4.18.0-80.el8_exynos_hdmi

Device-Tree bindings for drm hdmi driver

Required properties:

• compatible: value should be one among the following:
  1. “samsung,exynos4210-hdmi”
  2. “samsung,exynos4212-hdmi”
  3. “samsung,exynos5420-hdmi”
  4. “samsung,exynos5433-hdmi”
• reg: physical base address of the hdmi and length of memory mapped
  region.
• interrupts: interrupt number to the cpu.
• hpd-gpios: following information about the hotplug gpio pin.
  a) phandle of the gpio controller node.
  b) pin number within the gpio controller.
  c) optional flags and pull up/down.
• ddc: phandle to the hdmi ddc node
• phy: phandle to the hdmi phy node
• samsung,syscon-phandle: phandle for system controller node for PMU.
• #sound-dai-cells: should be 0.

Required properties for Exynos 4210, 4212, 5420 and 5433:

• clocks: list of clock IDs from SoC clock driver.
  a) hdmi: Gate of HDMI IP bus clock.
  b) sclk_hdmi: Gate of HDMI special clock.
  c) sclk_pixel: Pixel special clock, one of the two possible inputs of

    HDMI clock mux.
  

  d) sclk_hdmiphy: HDMI PHY clock output, one of two possible inputs of

    HDMI clock mux.
  

  e) mout_hdmi: It is required by the driver to switch between the 2

    parents i.e. sclk_pixel and sclk_hdmiphy. If hdmiphy is stable
    after configuration, parent is set to sclk_hdmiphy else
    sclk_pixel.
  

• clock-names: aliases as per driver requirements for above clock IDs:
  “hdmi”, “sclk_hdmi”, “sclk_pixel”, “sclk_hdmiphy” and “mout_hdmi”.

Required properties for Exynos 5433:

• clocks: list of clock specifiers according to common clock bindings.
  a) hdmi_pclk: Gate of HDMI IP APB bus.
  b) hdmi_i_pclk: Gate of HDMI-PHY IP APB bus.
  d) i_tmds_clk: Gate of HDMI TMDS clock.
  e) i_pixel_clk: Gate of HDMI pixel clock.
  f) i_spdif_clk: Gate of HDMI SPDIF clock.
  g) oscclk: Oscillator clock, used as parent of following *_user clocks

    in case HDMI-PHY is not operational.
  

  h) tmds_clko: TMDS clock generated by HDMI-PHY.
  i) tmds_clko_user: MUX used to switch between oscclk and tmds_clko,

    respectively if HDMI-PHY is off and operational.
  

  j) pixel_clko: Pixel clock generated by HDMI-PHY.
  k) pixel_clko_user: MUX used to switch between oscclk and pixel_clko,

    respectively if HDMI-PHY is off and operational.
  

• clock-names: aliases for above clock specfiers.
• samsung,sysreg: handle to syscon used to control the system registers.

Example:

hdmi {
    compatible = "samsung,exynos4212-hdmi";
    reg = <0x14530000 0x100000>;
    interrupts = <0 95 0>;
    hpd-gpios = <&gpx3 7 1>;
    ddc = <&hdmi_ddc_node>;
    phy = <&hdmi_phy_node>;
    samsung,syscon-phandle = <&pmu_system_controller>;
};