Kernel-4.18.0-80.el8_exynos7-decon

Device-Tree bindings for Samsung Exynos7 SoC display controller (DECON)

DECON (Display and Enhancement Controller) is the Display Controller for the
Exynos7 series of SoCs which transfers the image data from a video memory
buffer to an external LCD interface.

Required properties:

• compatible: value should be “samsung,exynos7-decon”;

• reg: physical base address and length of the DECON registers set.

• interrupt-parent: should be the phandle of the decon controller’s

    parent interrupt controller.
  

• interrupts: should contain a list of all DECON IP block interrupts in the

     order: FIFO Level, VSYNC, LCD_SYSTEM. The interrupt specifier
     format depends on the interrupt controller used.
  

• interrupt-names: should contain the interrupt names: “fifo”, “vsync”,
  “lcd_sys”, in the same order as they were listed in the interrupts

    property.
  

• pinctrl-0: pin control group to be used for this controller.

• pinctrl-names: must contain a “default” entry.

• clocks: must include clock specifiers corresponding to entries in the

     clock-names property.
  

• clock-names: list of clock names sorted in the same order as the clocks

           property. Must contain "pclk_decon0", "aclk_decon0",
       "decon0_eclk", "decon0_vclk".
  

• i80-if-timings: timing configuration for lcd i80 interface support.

Optional Properties:

• power-domains: a phandle to DECON power domain node.
• display-timings: timing settings for DECON, as described in document 1.

    Can be used in case timings cannot be provided otherwise
    or to override timings provided by the panel.
  

Example:

SoC specific DT entry:

decon@13930000 {
    compatible = "samsung,exynos7-decon";
    interrupt-parent = <&combiner>;
    reg = <0x13930000 0x1000>;
    interrupt-names = "lcd_sys", "vsync", "fifo";
    interrupts = <0 188 0>, <0 189 0>, <0 190 0>;
    clocks = <&clock_disp PCLK_DECON_INT>,
         <&clock_disp ACLK_DECON_INT>,
         <&clock_disp SCLK_DECON_INT_ECLK>,
         <&clock_disp SCLK_DECON_INT_EXTCLKPLL>;
    clock-names = "pclk_decon0", "aclk_decon0", "decon0_eclk",
            "decon0_vclk";
    status = "disabled";
};

Board specific DT entry:

decon@13930000 {
    pinctrl-0 = <&lcd_clk &pwm1_out>;
    pinctrl-names = "default";
    status = "okay";
};