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The Exynos display port interface should be configured based on
the type of panel connected to it.
We use two nodes:
-dp-controller node
-dptx-phy node(defined inside dp-controller node)
For the DP-PHY initialization, we use the dptx-phy node.
Required properties for dptx-phy: deprecated, use phys and phy-names
-reg: deprecated
Base address of DP PHY register.
-samsung,enable-mask: deprecated
The bit-mask used to enable/disable DP PHY.
For the Panel initialization, we read data from dp-controller node.
Required properties for dp-controller:
-compatible:
should be "samsung,exynos5-dp".
-reg:
physical base address of the controller and length
of memory mapped region.
-interrupts:
interrupt combiner values.
-clocks:
from common clock binding: handle to dp clock.
-clock-names:
from common clock binding: Shall be "dp".
-interrupt-parent:
phandle to Interrupt combiner node.
-phys:
from general PHY binding: the phandle for the PHY device.
-phy-names:
from general PHY binding: Should be "dp".
-samsung,color-space:
input video data format.
COLOR_RGB = 0, COLOR_YCBCR422 = 1, COLOR_YCBCR444 = 2
-samsung,dynamic-range:
dynamic range for input video data.
VESA = 0, CEA = 1
-samsung,ycbcr-coeff:
YCbCr co-efficients for input video.
COLOR_YCBCR601 = 0, COLOR_YCBCR709 = 1
-samsung,color-depth:
number of bits per colour component.
COLOR_6 = 0, COLOR_8 = 1, COLOR_10 = 2, COLOR_12 = 3
-samsung,link-rate:
link rate supported by the panel.
LINK_RATE_1_62GBPS = 0x6, LINK_RATE_2_70GBPS = 0x0A
-samsung,lane-count:
number of lanes supported by the panel.
LANE_COUNT1 = 1, LANE_COUNT2 = 2, LANE_COUNT4 = 4
- display-timings: timings for the connected panel as described by
Documentation/devicetree/bindings/video/display-timing.txt
Optional properties for dp-controller:
-interlaced:
interlace scan mode.
Progressive if defined, Interlaced if not defined
-vsync-active-high:
VSYNC polarity configuration.
High if defined, Low if not defined
-hsync-active-high:
HSYNC polarity configuration.
High if defined, Low if not defined
-samsung,hpd-gpio:
Hotplug detect GPIO.
Indicates which GPIO should be used for hotplug
detection
Example:
SOC specific portion:
dp-controller {
compatible = "samsung,exynos5-dp";
reg = <0x145b0000 0x10000>;
interrupts = <10 3>;
interrupt-parent = <&combiner>;
clocks = <&clock 342>;
clock-names = "dp";
phys = <&dp_phy>;
phy-names = "dp";
};
Board Specific portion:
dp-controller {
samsung,color-space = <0>;
samsung,dynamic-range = <0>;
samsung,ycbcr-coeff = <0>;
samsung,color-depth = <1>;
samsung,link-rate = <0x0a>;
samsung,lane-count = <4>;
display-timings {
native-mode = <&lcd_timing>;
lcd_timing: 1366x768 {
clock-frequency = <70589280>;
hactive = <1366>;
vactive = <768>;
hfront-porch = <40>;
hback-porch = <40>;
hsync-len = <32>;
vback-porch = <10>;
vfront-porch = <12>;
vsync-len = <6>;
};
};
};
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