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Diffstat (limited to 'Documentation/devicetree/bindings/display/msm/dsi.txt')
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diff --git a/Documentation/devicetree/bindings/display/msm/dsi.txt b/Documentation/devicetree/bindings/display/msm/dsi.txt new file mode 100644 index 000000000..dfc743219 --- /dev/null +++ b/Documentation/devicetree/bindings/display/msm/dsi.txt @@ -0,0 +1,244 @@ +Qualcomm Technologies Inc. adreno/snapdragon DSI output + +DSI Controller: +Required properties: +- compatible: + * "qcom,mdss-dsi-ctrl" +- reg: Physical base address and length of the registers of controller +- reg-names: The names of register regions. The following regions are required: + * "dsi_ctrl" +- interrupts: The interrupt signal from the DSI block. +- power-domains: Should be <&mmcc MDSS_GDSC>. +- clocks: Phandles to device clocks. +- clock-names: the following clocks are required: + * "mdp_core" + * "iface" + * "bus" + * "core_mmss" + * "byte" + * "pixel" + * "core" + For DSIv2, we need an additional clock: + * "src" + For DSI6G v2.0 onwards, we need also need the clock: + * "byte_intf" +- assigned-clocks: Parents of "byte" and "pixel" for the given platform. +- assigned-clock-parents: The Byte clock and Pixel clock PLL outputs provided + by a DSI PHY block. See [1] for details on clock bindings. +- vdd-supply: phandle to vdd regulator device node +- vddio-supply: phandle to vdd-io regulator device node +- vdda-supply: phandle to vdda regulator device node +- phys: phandle to DSI PHY device node +- phy-names: the name of the corresponding PHY device +- syscon-sfpb: A phandle to mmss_sfpb syscon node (only for DSIv2) +- ports: Contains 2 DSI controller ports as child nodes. Each port contains + an endpoint subnode as defined in [2] and [3]. + +Optional properties: +- panel@0: Node of panel connected to this DSI controller. + See files in [4] for each supported panel. +- qcom,dual-dsi-mode: Boolean value indicating if the DSI controller is + driving a panel which needs 2 DSI links. +- qcom,master-dsi: Boolean value indicating if the DSI controller is driving + the master link of the 2-DSI panel. +- qcom,sync-dual-dsi: Boolean value indicating if the DSI controller is + driving a 2-DSI panel whose 2 links need receive command simultaneously. +- pinctrl-names: the pin control state names; should contain "default" +- pinctrl-0: the default pinctrl state (active) +- pinctrl-n: the "sleep" pinctrl state +- ports: contains DSI controller input and output ports as children, each + containing one endpoint subnode. + + DSI Endpoint properties: + - remote-endpoint: For port@0, set to phandle of the connected panel/bridge's + input endpoint. For port@1, set to the MDP interface output. See [2] for + device graph info. + + - data-lanes: this describes how the physical DSI data lanes are mapped + to the logical lanes on the given platform. The value contained in + index n describes what physical lane is mapped to the logical lane n + (DATAn, where n lies between 0 and 3). The clock lane position is fixed + and can't be changed. Hence, they aren't a part of the DT bindings. See + [3] for more info on the data-lanes property. + + For example: + + data-lanes = <3 0 1 2>; + + The above mapping describes that the logical data lane DATA0 is mapped to + the physical data lane DATA3, logical DATA1 to physical DATA0, logic DATA2 + to phys DATA1 and logic DATA3 to phys DATA2. + + There are only a limited number of physical to logical mappings possible: + <0 1 2 3> + <1 2 3 0> + <2 3 0 1> + <3 0 1 2> + <0 3 2 1> + <1 0 3 2> + <2 1 0 3> + <3 2 1 0> + +DSI PHY: +Required properties: +- compatible: Could be the following + * "qcom,dsi-phy-28nm-hpm" + * "qcom,dsi-phy-28nm-lp" + * "qcom,dsi-phy-20nm" + * "qcom,dsi-phy-28nm-8960" + * "qcom,dsi-phy-14nm" + * "qcom,dsi-phy-10nm" +- reg: Physical base address and length of the registers of PLL, PHY. Some + revisions require the PHY regulator base address, whereas others require the + PHY lane base address. See below for each PHY revision. +- reg-names: The names of register regions. The following regions are required: + For DSI 28nm HPM/LP/8960 PHYs and 20nm PHY: + * "dsi_pll" + * "dsi_phy" + * "dsi_phy_regulator" + For DSI 14nm and 10nm PHYs: + * "dsi_pll" + * "dsi_phy" + * "dsi_phy_lane" +- clock-cells: Must be 1. The DSI PHY block acts as a clock provider, creating + 2 clocks: A byte clock (index 0), and a pixel clock (index 1). +- power-domains: Should be <&mmcc MDSS_GDSC>. +- clocks: Phandles to device clocks. See [1] for details on clock bindings. +- clock-names: the following clocks are required: + * "iface" + For 28nm HPM/LP, 28nm 8960 PHYs: +- vddio-supply: phandle to vdd-io regulator device node + For 20nm PHY: +- vddio-supply: phandle to vdd-io regulator device node +- vcca-supply: phandle to vcca regulator device node + For 14nm PHY: +- vcca-supply: phandle to vcca regulator device node + For 10nm PHY: +- vdds-supply: phandle to vdds regulator device node + +Optional properties: +- qcom,dsi-phy-regulator-ldo-mode: Boolean value indicating if the LDO mode PHY + regulator is wanted. +- qcom,mdss-mdp-transfer-time-us: Specifies the dsi transfer time for command mode + panels in microseconds. Driver uses this number to adjust + the clock rate according to the expected transfer time. + Increasing this value would slow down the mdp processing + and can result in slower performance. + Decreasing this value can speed up the mdp processing, + but this can also impact power consumption. + As a rule this time should not be higher than the time + that would be expected with the processing at the + dsi link rate since anyways this would be the maximum + transfer time that could be achieved. + If ping pong split is enabled, this time should not be higher + than two times the dsi link rate time. + If the property is not specified, then the default value is 14000 us. + +[1] Documentation/devicetree/bindings/clock/clock-bindings.txt +[2] Documentation/devicetree/bindings/graph.txt +[3] Documentation/devicetree/bindings/media/video-interfaces.txt +[4] Documentation/devicetree/bindings/display/panel/ + +Example: + dsi0: dsi@fd922800 { + compatible = "qcom,mdss-dsi-ctrl"; + qcom,dsi-host-index = <0>; + interrupt-parent = <&mdp>; + interrupts = <4 0>; + reg-names = "dsi_ctrl"; + reg = <0xfd922800 0x200>; + power-domains = <&mmcc MDSS_GDSC>; + clock-names = + "bus", + "byte", + "core", + "core_mmss", + "iface", + "mdp_core", + "pixel"; + clocks = + <&mmcc MDSS_AXI_CLK>, + <&mmcc MDSS_BYTE0_CLK>, + <&mmcc MDSS_ESC0_CLK>, + <&mmcc MMSS_MISC_AHB_CLK>, + <&mmcc MDSS_AHB_CLK>, + <&mmcc MDSS_MDP_CLK>, + <&mmcc MDSS_PCLK0_CLK>; + + assigned-clocks = + <&mmcc BYTE0_CLK_SRC>, + <&mmcc PCLK0_CLK_SRC>; + assigned-clock-parents = + <&dsi_phy0 0>, + <&dsi_phy0 1>; + + vdda-supply = <&pma8084_l2>; + vdd-supply = <&pma8084_l22>; + vddio-supply = <&pma8084_l12>; + + phys = <&dsi_phy0>; + phy-names ="dsi-phy"; + + qcom,dual-dsi-mode; + qcom,master-dsi; + qcom,sync-dual-dsi; + + qcom,mdss-mdp-transfer-time-us = <12000>; + + pinctrl-names = "default", "sleep"; + pinctrl-0 = <&dsi_active>; + pinctrl-1 = <&dsi_suspend>; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + reg = <0>; + dsi0_in: endpoint { + remote-endpoint = <&mdp_intf1_out>; + }; + }; + + port@1 { + reg = <1>; + dsi0_out: endpoint { + remote-endpoint = <&panel_in>; + data-lanes = <0 1 2 3>; + }; + }; + }; + + panel: panel@0 { + compatible = "sharp,lq101r1sx01"; + reg = <0>; + link2 = <&secondary>; + + power-supply = <...>; + backlight = <...>; + + port { + panel_in: endpoint { + remote-endpoint = <&dsi0_out>; + }; + }; + }; + }; + + dsi_phy0: dsi-phy@fd922a00 { + compatible = "qcom,dsi-phy-28nm-hpm"; + qcom,dsi-phy-index = <0>; + reg-names = + "dsi_pll", + "dsi_phy", + "dsi_phy_regulator"; + reg = <0xfd922a00 0xd4>, + <0xfd922b00 0x2b0>, + <0xfd922d80 0x7b>; + clock-names = "iface"; + clocks = <&mmcc MDSS_AHB_CLK>; + #clock-cells = <1>; + vddio-supply = <&pma8084_l12>; + + qcom,dsi-phy-regulator-ldo-mode; + }; |