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authorJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-11 10:41:07 +0300
committerJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-13 08:17:18 +0300
commite09b41010ba33a20a87472ee821fa407a5b8da36 (patch)
treed10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/Documentation/devicetree/bindings/video/ti,omap-dss.txt
parentf93b97fd65072de626c074dbe099a1fff05ce060 (diff)
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page. During the rebasing, the following patch collided: Force tick interrupt and get rid of softirq magic(I70131fb85). Collisions have been removed because its logic was found on the source already. Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769 Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
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-Texas Instruments OMAP Display Subsystem
-========================================
-
-Generic Description
--------------------
-
-This document is a generic description of the OMAP Display Subsystem bindings.
-Binding details for each OMAP SoC version are described in respective binding
-documentation.
-
-The OMAP Display Subsystem (DSS) hardware consists of DSS Core, DISPC module and
-a number of encoder modules. All DSS versions contain DSS Core and DISPC, but
-the encoder modules vary.
-
-The DSS Core is the parent of the other DSS modules, and manages clock routing,
-integration to the SoC, etc.
-
-DISPC is the display controller, which reads pixels from the memory and outputs
-a RGB pixel stream to encoders.
-
-The encoder modules encode the received RGB pixel stream to a video output like
-HDMI, MIPI DPI, etc.
-
-Video Ports
------------
-
-The DSS Core and the encoders have video port outputs. The structure of the
-video ports is described in Documentation/devicetree/bindings/graph.txt,
-and the properties for the ports and endpoints for each encoder are
-described in the SoC's DSS binding documentation.
-
-The video ports are used to describe the connections to external hardware, like
-panels or external encoders.
-
-Aliases
--------
-
-The board dts file may define aliases for displays to assign "displayX" style
-name for each display. If no aliases are defined, a semi-random number is used
-for the display.
-
-Example
--------
-
-A shortened example of the DSS description for OMAP4, with non-relevant parts
-removed, defined in omap4.dtsi:
-
-dss: dss@58000000 {
- compatible = "ti,omap4-dss";
- reg = <0x58000000 0x80>;
- status = "disabled";
- ti,hwmods = "dss_core";
- clocks = <&dss_dss_clk>;
- clock-names = "fck";
- #address-cells = <1>;
- #size-cells = <1>;
- ranges;
-
- dispc@58001000 {
- compatible = "ti,omap4-dispc";
- reg = <0x58001000 0x1000>;
- interrupts = <GIC_SPI 25 IRQ_TYPE_LEVEL_HIGH>;
- ti,hwmods = "dss_dispc";
- clocks = <&dss_dss_clk>;
- clock-names = "fck";
- };
-
- hdmi: encoder@58006000 {
- compatible = "ti,omap4-hdmi";
- reg = <0x58006000 0x200>,
- <0x58006200 0x100>,
- <0x58006300 0x100>,
- <0x58006400 0x1000>;
- reg-names = "wp", "pll", "phy", "core";
- interrupts = <GIC_SPI 101 IRQ_TYPE_LEVEL_HIGH>;
- status = "disabled";
- ti,hwmods = "dss_hdmi";
- clocks = <&dss_48mhz_clk>, <&dss_sys_clk>;
- clock-names = "fck", "sys_clk";
- };
-};
-
-A shortened example of the board description for OMAP4 Panda board, defined in
-omap4-panda.dts.
-
-The Panda board has a DVI and a HDMI connector, and the board contains a TFP410
-chip (MIPI DPI to DVI encoder) and a TPD12S015 chip (HDMI ESD protection & level
-shifter). The video pipelines for the connectors are formed as follows:
-
-DSS Core --(MIPI DPI)--> TFP410 --(DVI)--> DVI Connector
-OMAP HDMI --(HDMI)--> TPD12S015 --(HDMI)--> HDMI Connector
-
-/ {
- aliases {
- display0 = &dvi0;
- display1 = &hdmi0;
- };
-
- tfp410: encoder@0 {
- compatible = "ti,tfp410";
- gpios = <&gpio1 0 GPIO_ACTIVE_LOW>; /* 0, power-down */
-
- pinctrl-names = "default";
- pinctrl-0 = <&tfp410_pins>;
-
- ports {
- #address-cells = <1>;
- #size-cells = <0>;
-
- port@0 {
- reg = <0>;
-
- tfp410_in: endpoint@0 {
- remote-endpoint = <&dpi_out>;
- };
- };
-
- port@1 {
- reg = <1>;
-
- tfp410_out: endpoint@0 {
- remote-endpoint = <&dvi_connector_in>;
- };
- };
- };
- };
-
- dvi0: connector@0 {
- compatible = "dvi-connector";
- label = "dvi";
-
- i2c-bus = <&i2c3>;
-
- port {
- dvi_connector_in: endpoint {
- remote-endpoint = <&tfp410_out>;
- };
- };
- };
-
- tpd12s015: encoder@1 {
- compatible = "ti,tpd12s015";
-
- pinctrl-names = "default";
- pinctrl-0 = <&tpd12s015_pins>;
-
- gpios = <&gpio2 28 GPIO_ACTIVE_HIGH>, /* 60, CT CP HPD */
- <&gpio2 9 GPIO_ACTIVE_HIGH>, /* 41, LS OE */
- <&gpio2 31 GPIO_ACTIVE_HIGH>; /* 63, HPD */
-
- ports {
- #address-cells = <1>;
- #size-cells = <0>;
-
- port@0 {
- reg = <0>;
-
- tpd12s015_in: endpoint@0 {
- remote-endpoint = <&hdmi_out>;
- };
- };
-
- port@1 {
- reg = <1>;
-
- tpd12s015_out: endpoint@0 {
- remote-endpoint = <&hdmi_connector_in>;
- };
- };
- };
- };
-
- hdmi0: connector@1 {
- compatible = "hdmi-connector";
- label = "hdmi";
-
- port {
- hdmi_connector_in: endpoint {
- remote-endpoint = <&tpd12s015_out>;
- };
- };
- };
-};
-
-&dss {
- status = "ok";
-
- pinctrl-names = "default";
- pinctrl-0 = <&dss_dpi_pins>;
-
- port {
- dpi_out: endpoint {
- remote-endpoint = <&tfp410_in>;
- data-lines = <24>;
- };
- };
-};
-
-&hdmi {
- status = "ok";
- vdda-supply = <&vdac>;
-
- pinctrl-names = "default";
- pinctrl-0 = <&dss_hdmi_pins>;
-
- port {
- hdmi_out: endpoint {
- remote-endpoint = <&tpd12s015_in>;
- };
- };
-};