Qualcomm Technologies, Inc. DPU KMS
|
|
Description:
|
|
Device tree bindings for MSM Mobile Display Subsytem(MDSS) that encapsulates
|
sub-blocks like DPU display controller, DSI and DP interfaces etc.
|
The DPU display controller is found in SDM845 SoC.
|
|
MDSS:
|
Required properties:
|
- compatible: "qcom,sdm845-mdss"
|
- reg: physical base address and length of contoller's registers.
|
- reg-names: register region names. The following region is required:
|
* "mdss"
|
- power-domains: a power domain consumer specifier according to
|
Documentation/devicetree/bindings/power/power_domain.txt
|
- clocks: list of clock specifiers for clocks needed by the device.
|
- clock-names: device clock names, must be in same order as clocks property.
|
The following clocks are required:
|
* "iface"
|
* "bus"
|
* "core"
|
- interrupts: interrupt signal from MDSS.
|
- interrupt-controller: identifies the node as an interrupt controller.
|
- #interrupt-cells: specifies the number of cells needed to encode an interrupt
|
source, should be 1.
|
- iommus: phandle of iommu device node.
|
- #address-cells: number of address cells for the MDSS children. Should be 1.
|
- #size-cells: Should be 1.
|
- ranges: parent bus address space is the same as the child bus address space.
|
|
Optional properties:
|
- assigned-clocks: list of clock specifiers for clocks needing rate assignment
|
- assigned-clock-rates: list of clock frequencies sorted in the same order as
|
the assigned-clocks property.
|
|
MDP:
|
Required properties:
|
- compatible: "qcom,sdm845-dpu"
|
- reg: physical base address and length of controller's registers.
|
- reg-names : register region names. The following region is required:
|
* "mdp"
|
* "vbif"
|
- clocks: list of clock specifiers for clocks needed by the device.
|
- clock-names: device clock names, must be in same order as clocks property.
|
The following clocks are required.
|
* "bus"
|
* "iface"
|
* "core"
|
* "vsync"
|
- interrupts: interrupt line from DPU to MDSS.
|
- ports: contains the list of output ports from DPU device. These ports connect
|
to interfaces that are external to the DPU hardware, such as DSI, DP etc.
|
|
Each output port contains an endpoint that describes how it is connected to an
|
external interface. These are described by the standard properties documented
|
here:
|
Documentation/devicetree/bindings/graph.txt
|
Documentation/devicetree/bindings/media/video-interfaces.txt
|
|
Port 0 -> DPU_INTF1 (DSI1)
|
Port 1 -> DPU_INTF2 (DSI2)
|
|
Optional properties:
|
- assigned-clocks: list of clock specifiers for clocks needing rate assignment
|
- assigned-clock-rates: list of clock frequencies sorted in the same order as
|
the assigned-clocks property.
|
|
Example:
|
|
mdss: mdss@ae00000 {
|
compatible = "qcom,sdm845-mdss";
|
reg = <0xae00000 0x1000>;
|
reg-names = "mdss";
|
|
power-domains = <&clock_dispcc 0>;
|
|
clocks = <&gcc GCC_DISP_AHB_CLK>, <&gcc GCC_DISP_AXI_CLK>,
|
<&clock_dispcc DISP_CC_MDSS_MDP_CLK>;
|
clock-names = "iface", "bus", "core";
|
|
assigned-clocks = <&clock_dispcc DISP_CC_MDSS_MDP_CLK>;
|
assigned-clock-rates = <300000000>;
|
|
interrupts = <GIC_SPI 83 IRQ_TYPE_LEVEL_HIGH>;
|
interrupt-controller;
|
#interrupt-cells = <1>;
|
|
iommus = <&apps_iommu 0>;
|
|
#address-cells = <2>;
|
#size-cells = <1>;
|
ranges = <0 0 0xae00000 0xb2008>;
|
|
mdss_mdp: mdp@ae01000 {
|
compatible = "qcom,sdm845-dpu";
|
reg = <0 0x1000 0x8f000>, <0 0xb0000 0x2008>;
|
reg-names = "mdp", "vbif";
|
|
clocks = <&clock_dispcc DISP_CC_MDSS_AHB_CLK>,
|
<&clock_dispcc DISP_CC_MDSS_AXI_CLK>,
|
<&clock_dispcc DISP_CC_MDSS_MDP_CLK>,
|
<&clock_dispcc DISP_CC_MDSS_VSYNC_CLK>;
|
clock-names = "iface", "bus", "core", "vsync";
|
|
assigned-clocks = <&clock_dispcc DISP_CC_MDSS_MDP_CLK>,
|
<&clock_dispcc DISP_CC_MDSS_VSYNC_CLK>;
|
assigned-clock-rates = <0 0 300000000 19200000>;
|
|
interrupts = <0 IRQ_TYPE_LEVEL_HIGH>;
|
|
ports {
|
#address-cells = <1>;
|
#size-cells = <0>;
|
|
port@0 {
|
reg = <0>;
|
dpu_intf1_out: endpoint {
|
remote-endpoint = <&dsi0_in>;
|
};
|
};
|
|
port@1 {
|
reg = <1>;
|
dpu_intf2_out: endpoint {
|
remote-endpoint = <&dsi1_in>;
|
};
|
};
|
};
|
};
|
};
|
