Documentation/devicetree/bindings/display/exynos/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
  35 Optional properties for dp-controller:
  36         -interlaced:
  37                 interlace scan mode.
  38                         Progressive if defined, Interlaced if not defined
  39         -vsync-active-high:
  40                 VSYNC polarity configuration.
  41                         High if defined, Low if not defined
  42         -hsync-active-high:
  43                 HSYNC polarity configuration.
  44                         High if defined, Low if not defined
  45         -samsung,hpd-gpio:
  46                 Hotplug detect GPIO.
  47                         Indicates which GPIO should be used for hotplug
  48                         detection
  49         -video interfaces: Device node can contain video interface port
  50                         nodes according to [1].
  51         - display-timings: timings for the connected panel as described by
  52                 Documentation/devicetree/bindings/display/panel/display-timing.txt
  53
  54 For the below properties, please refer to Analogix DP binding document:
  55  * Documentation/devicetree/bindings/display/bridge/analogix_dp.txt
  56         -phys (required)
  57         -phy-names (required)
  58         -hpd-gpios (optional)
  59          force-hpd (optional)
  60
  61 Deprecated properties for DisplayPort:
  62 -interlaced:            deprecated prop that can parsed from drm_display_mode.
  63 -vsync-active-high:     deprecated prop that can parsed from drm_display_mode.
  64 -hsync-active-high:     deprecated prop that can parsed from drm_display_mode.
  65 -samsung,ycbcr-coeff:   deprecated prop that can parsed from drm_display_mode.
  66 -samsung,dynamic-range: deprecated prop that can parsed from drm_display_mode.
  67 -samsung,color-space:   deprecated prop that can parsed from drm_display_info.
  68 -samsung,color-depth:   deprecated prop that can parsed from drm_display_info.
  69 -samsung,link-rate:     deprecated prop that can reading from monitor by dpcd method.
  70 -samsung,lane-count:    deprecated prop that can reading from monitor by dpcd method.
  71 -samsung,hpd-gpio:      deprecated name for hpd-gpios.
  72
  73 -------------------------------------------------------------------------------
  74
  75 Example:
  76
  77 SOC specific portion:
  78         dp-controller {
  79                 compatible = "samsung,exynos5-dp";
  80                 reg = <0x145b0000 0x10000>;
  81                 interrupts = <10 3>;
  82                 interrupt-parent = <&combiner>;
  83                 clocks = <&clock 342>;
  84                 clock-names = "dp";
  85
  86                 phys = <&dp_phy>;
  87                 phy-names = "dp";
  88         };
  89
  90 Board Specific portion:
  91         dp-controller {
  92                 display-timings {
  93                         native-mode = <&lcd_timing>;
  94                         lcd_timing: 1366x768 {
  95                                 clock-frequency = <70589280>;
  96                                 hactive = <1366>;
  97                                 vactive = <768>;
  98                                 hfront-porch = <40>;
  99                                 hback-porch = <40>;
 100                                 hsync-len = <32>;
 101                                 vback-porch = <10>;
 102                                 vfront-porch = <12>;
 103                                 vsync-len = <6>;
 104                         };
 105                 };
 106
 107                 ports {
 108                         port@0 {
 109                                 dp_out: endpoint {
 110                                         remote-endpoint = <&bridge_in>;
 111                                 };
 112                         };
 113                 };
 114         };