Add documentation for the DT bindings in exynos display port driver.
Signed-off-by: Ajay Kumar <[email protected]>
---
.../devicetree/bindings/video/exynos_dp.txt | 83 ++++++++++++++++++++
1 files changed, 83 insertions(+), 0 deletions(-)
create mode 100644 Documentation/devicetree/bindings/video/exynos_dp.txt
diff --git a/Documentation/devicetree/bindings/video/exynos_dp.txt
b/Documentation/devicetree/bindings/video/exynos_dp.txt
new file mode 100644
index 0000000..a021963
--- /dev/null
+++ b/Documentation/devicetree/bindings/video/exynos_dp.txt
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+Exynos display port driver should configure the display port interface
+based on the type of panel connected to it.
+
+We use two nodes:
+ -dptx_phy node
+ -display-port-controller node
+
+For the dp-phy initialization, we use a dptx_phy node.
+Required properties for dptx_phy:
+ -compatible:
+ Should be "samsung,dp-phy".
+ -samsung,dptx_phy_reg:
+ Base address of DP PHY register.
+ -samsung,enable_mask:
+ The bit-mask used to enable/disable DP PHY.
+
+For the Panel initialization, we read data from display-port-controller node.
+Required properties for display-port-controller:
+ -compatible:
+ Should be "samsung,exynos5-dp".
+ -reg:
+ physical base address of the controller and length
+ of memory mapped region.
+ -interrupts:
+ Interrupt combiner values.
+ -interrupt-parent:
+ phandle to Interrupt combiner node.
+ -samsung,dp_phy:
+ phandle to dptx_phy node.
+ -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
+ -samsung,interlaced:
+ Interlace scan mode.
+ Progressive if defined, Interlaced if not defined
+ -samsung,v_sync_polarity:
+ VSYNC polarity configuration.
+ High if defined, Low if not defined
+ -samsung,h_sync_polarity:
+ HSYNC polarity configuration.
+ High if defined, Low if not defined
+
+Example:
+
+SOC specific portion:
+ dptx_phy: dptx_phy@0x10040720 {
+ compatible = "samsung,dp-phy";
+ samsung,dptx_phy_reg = <0x10040720>;
+ samsung,enable_mask = <1>;
+ };
+
+ display-port-controller {
+ compatible = "samsung,exynos5-dp";
+ reg = <0x145B0000 0x10000>;
+ interrupts = <10 3>;
+ interrupt-parent = <&combiner>;
+ samsung,dp_phy = <&dptx_phy>;
+ };
+
+Board Specific portion:
+ display-port-controller {
+ samsung,color_space = <0>;
+ samsung,dynamic_range = <0>;
+ samsung,ycbcr_coeff = <0>;
+ samsung,color_depth = <1>;
+ samsung,link_rate = <0x0a>;
+ samsung,lane_count = <2>;
+ };
--
1.7.0.4
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