Documentation/devicetree/bindings/video/exynos_dp.txt

   1 The Exynos display port interface should be configured based on
   2 the type of panel connected to it.
   3
   4 We use two nodes:
   5         -dp-controller node
   6         -dptx-phy node(defined inside dp-controller node)
   7
   8 For the DP-PHY initialization, we use the dptx-phy node.
   9 Required properties for dptx-phy: deprecated, use phys and phy-names
  10         -reg: deprecated
  11                 Base address of DP PHY register.
  12         -samsung,enable-mask: deprecated
  13                 The bit-mask used to enable/disable DP PHY.
  14
  15 For the Panel initialization, we read data from dp-controller node.
  16 Required properties for dp-controller:
  17         -compatible:
  18                 should be "samsung,exynos5-dp".
  19         -reg:
  20                 physical base address of the controller and length
  21                 of memory mapped region.
  22         -interrupts:
  23                 interrupt combiner values.
  24         -clocks:
  25                 from common clock binding: handle to dp clock.
  26         -clock-names:
  27                 from common clock binding: Shall be "dp".
  28         -interrupt-parent:
  29                 phandle to Interrupt combiner node.
  30         -phys:
  31                 from general PHY binding: the phandle for the PHY device.
  32         -phy-names:
  33                 from general PHY binding: Should be "dp".
  34         -samsung,color-space:
  35                 input video data format.
  36                         COLOR_RGB = 0, COLOR_YCBCR422 = 1, COLOR_YCBCR444 = 2
  37         -samsung,dynamic-range:
  38                 dynamic range for input video data.
  39                         VESA = 0, CEA = 1
  40         -samsung,ycbcr-coeff:
  41                 YCbCr co-efficients for input video.
  42                         COLOR_YCBCR601 = 0, COLOR_YCBCR709 = 1
  43         -samsung,color-depth:
  44                 number of bits per colour component.
  45                         COLOR_6 = 0, COLOR_8 = 1, COLOR_10 = 2, COLOR_12 = 3
  46         -samsung,link-rate:
  47                 link rate supported by the panel.
  48                         LINK_RATE_1_62GBPS = 0x6, LINK_RATE_2_70GBPS = 0x0A
  49         -samsung,lane-count:
  50                 number of lanes supported by the panel.
  51                         LANE_COUNT1 = 1, LANE_COUNT2 = 2, LANE_COUNT4 = 4
  52         - display-timings: timings for the connected panel as described by
  53                 Documentation/devicetree/bindings/video/display-timing.txt
  54
  55 Optional properties for dp-controller:
  56         -interlaced:
  57                 interlace scan mode.
  58                         Progressive if defined, Interlaced if not defined
  59         -vsync-active-high:
  60                 VSYNC polarity configuration.
  61                         High if defined, Low if not defined
  62         -hsync-active-high:
  63                 HSYNC polarity configuration.
  64                         High if defined, Low if not defined
  65         -samsung,hpd-gpio:
  66                 Hotplug detect GPIO.
  67                         Indicates which GPIO should be used for hotplug
  68                         detection
  69         -video interfaces: Device node can contain video interface port
  70                             nodes according to [1].
  71
  72 [1]: Documentation/devicetree/bindings/media/video-interfaces.txt
  73
  74 Example:
  75
  76 SOC specific portion:
  77         dp-controller {
  78                 compatible = "samsung,exynos5-dp";
  79                 reg = <0x145b0000 0x10000>;
  80                 interrupts = <10 3>;
  81                 interrupt-parent = <&combiner>;
  82                 clocks = <&clock 342>;
  83                 clock-names = "dp";
  84
  85                 phys = <&dp_phy>;
  86                 phy-names = "dp";
  87         };
  88
  89 Board Specific portion:
  90         dp-controller {
  91                 samsung,color-space = <0>;
  92                 samsung,dynamic-range = <0>;
  93                 samsung,ycbcr-coeff = <0>;
  94                 samsung,color-depth = <1>;
  95                 samsung,link-rate = <0x0a>;
  96                 samsung,lane-count = <4>;
  97
  98                 display-timings {
  99                         native-mode = <&lcd_timing>;
 100                         lcd_timing: 1366x768 {
 101                                 clock-frequency = <70589280>;
 102                                 hactive = <1366>;
 103                                 vactive = <768>;
 104                                 hfront-porch = <40>;
 105                                 hback-porch = <40>;
 106                                 hsync-len = <32>;
 107                                 vback-porch = <10>;
 108                                 vfront-porch = <12>;
 109                                 vsync-len = <6>;
 110                         };
 111                 };
 112
 113                 ports {
 114                         port@0 {
 115                                 dp_out: endpoint {
 116                                         remote-endpoint = <&bridge_in>;
 117                                 };
 118                         };
 119                 };
 120         };