Re: [PATCH v4 4/4] dt-bindings: media: Document Synopsys Designware HDMI RX
From: Rob Herring <hidden>
Date: 2017-06-23 21:58:44
Also in:
linux-media, lkml
On Tue, Jun 20, 2017 at 06:26:12PM +0100, Jose Abreu wrote:
quoted hunk ↗ jump to hunk
Document the bindings for the Synopsys Designware HDMI RX. Signed-off-by: Jose Abreu <joabreu-HKixBCOQz3hWk0Htik3J/w@public.gmane.org> Cc: Carlos Palminha <palminha-HKixBCOQz3hWk0Htik3J/w@public.gmane.org> Cc: Rob Herring <redacted> Cc: Mark Rutland <redacted> Cc: Mauro Carvalho Chehab <redacted> Cc: Hans Verkuil <redacted> Cc: Sylwester Nawrocki <redacted> Changes from v3: - Document the new DT bindings suggested by Sylwester Changes from v2: - Document edid-phandle property --- .../devicetree/bindings/media/snps,dw-hdmi-rx.txt | 70 ++++++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 Documentation/devicetree/bindings/media/snps,dw-hdmi-rx.txtdiff --git a/Documentation/devicetree/bindings/media/snps,dw-hdmi-rx.txt b/Documentation/devicetree/bindings/media/snps,dw-hdmi-rx.txt new file mode 100644 index 0000000..efb0ac3 --- /dev/null +++ b/Documentation/devicetree/bindings/media/snps,dw-hdmi-rx.txt@@ -0,0 +1,70 @@ +Synopsys DesignWare HDMI RX Decoder +=================================== + +This document defines device tree properties for the Synopsys DesignWare HDMI +RX Decoder (DWC HDMI RX). It doesn't constitute a device tree binding +specification by itself but is meant to be referenced by platform-specific +device tree bindings. + +When referenced from platform device tree bindings the properties defined in +this document are defined as follows. + +- compatible: Shall be "snps,dw-hdmi-rx". + +- reg: Memory mapped base address and length of the DWC HDMI RX registers. + +- interrupts: Reference to the DWC HDMI RX interrupt and 5v sense interrupt. + +- clocks: Phandle to the config clock block. + +- clock-names: Shall be "cfg-clk".
"-clk" is redundant. Seems strange that this is the only clock. The only other clock is the HDMI clock from the HDMI transmitter.
+
+- edid-phandle: phandle to the EDID handler block.
+
+- #address-cells: Shall be 1.
+
+- #size-cells: Shall be 0.
+
+You also have to create a subnode for phy driver. Phy properties are as follows.
+
+- compatible: Shall be "snps,dw-hdmi-phy-e405".
+
+- reg: Shall be JTAG address of phy.
+
+- clocks: Phandle for cfg clock.
+
+- clock-names:Shall be "cfg-clk".
+
+A sample binding is now provided. The compatible string is for a SoC which has
+has a Synopsys Designware HDMI RX decoder inside.
+
+Example:
+
+dw_hdmi_soc: dw-hdmi-soc@0 {
+ compatible = "snps,dw-hdmi-soc";Not documented.
+ reg = <0x11c00 0x1000>; /* EDIDs */
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges;
+
+ dw_hdmi_rx@0 {hdmi-rx@0
+ compatible = "snps,dw-hdmi-rx"; + reg = <0x0 0x10000>; + interrupts = <1 2>; + edid-phandle = <&dw_hdmi_soc>;
Don't need this if it is the parent node.
+
+ clocks = <&dw_hdmi_refclk>;
+ clock-names = "cfg-clk";
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ dw_hdmi_phy_e405@fc {hdmi-phy@fc
+ compatible = "snps,dw-hdmi-phy-e405"; + reg = <0xfc>; + + clocks = <&dw_hdmi_refclk>; + clock-names = "cfg-clk"; + }; + }; +}; -- 1.9.1
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