Documentation/devicetree/bindings/display/rockchip/rockchip-vop.txt

   1 device-tree bindings for rockchip soc display controller (vop)
   2
   3 VOP (Visual Output Processor) is the Display Controller for the Rockchip
   4 series of SoCs which transfers the image data from a video memory
   5 buffer to an external LCD interface.
   6
   7 Required properties:
   8 - compatible: value should be one of the following
   9                 "rockchip,rk3036-vop";
  10                 "rockchip,rk3288-vop";
  11                 "rockchip,rk3368-vop";
  12                 "rockchip,rk3366-vop";
  13                 "rockchip,rk3399-vop-big";
  14                 "rockchip,rk3399-vop-lit";
  15                 "rockchip,rk322x-vop";
  16                 "rockchip,rk3328-vop";
  17
  18 - reg: there are two register region can configure for the device:
  19   - first region: (Required) Base address and size of the controllers
  20   - second region: (Optinal) Address and length of the gamma table,
  21                    take care of this register's length, driver would use
  22                    register's length to decide gamma table size.
  23
  24 - interrupts: should contain a list of all VOP IP block interrupts in the
  25                  order: VSYNC, LCD_SYSTEM. The interrupt specifier
  26                  format depends on the interrupt controller used.
  27
  28 - clocks: must include clock specifiers corresponding to entries in the
  29                 clock-names property.
  30
  31 - clock-names: Must contain
  32                 aclk_vop: for ddr buffer transfer.
  33                 hclk_vop: for ahb bus to R/W the phy regs.
  34                 dclk_vop: pixel clock.
  35                 dclk_source: optinal, dclk sources from display plls.
  36
  37 - resets: Must contain an entry for each entry in reset-names.
  38   See ../reset/reset.txt for details.
  39 - reset-names: Must include the following entries:
  40   - axi
  41   - ahb
  42   - dclk
  43
  44 - iommus: required a iommu node
  45
  46 - port: A port node with endpoint definitions as defined in
  47   Documentation/devicetree/bindings/media/video-interfaces.txt.
  48
  49 Example:
  50 SoC specific DT entry:
  51         vopb: vopb@ff930000 {
  52                 compatible = "rockchip,rk3288-vop";
  53                 reg = <0xff930000 0x19c>, <0xff931000 0x1000>;
  54                 interrupts = <GIC_SPI 15 IRQ_TYPE_LEVEL_HIGH>;
  55                 clocks = <&cru ACLK_VOP0>, <&cru DCLK_VOP0>, <&cru HCLK_VOP0>;
  56                 clock-names = "aclk_vop", "dclk_vop", "hclk_vop";
  57                 resets = <&cru SRST_LCDC1_AXI>, <&cru SRST_LCDC1_AHB>, <&cru SRST_LCDC1_DCLK>;
  58                 reset-names = "axi", "ahb", "dclk";
  59                 iommus = <&vopb_mmu>;
  60                 vopb_out: port {
  61                         #address-cells = <1>;
  62                         #size-cells = <0>;
  63                         vopb_out_edp: endpoint@0 {
  64                                 reg = <0>;
  65                                 remote-endpoint=<&edp_in_vopb>;
  66                         };
  67                         vopb_out_hdmi: endpoint@1 {
  68                                 reg = <1>;
  69                                 remote-endpoint=<&hdmi_in_vopb>;
  70                         };
  71                 };
  72         };