mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
619053220a
Current komeda driver uses three dedicated clks for a specific purpose: - mclk: main engine clock - pclk: APB clock - pipeline->aclk: AXI clock. But per spec the komeda HW only has three input clks: - ACLK: used for AXI masters, APB slave and most pipeline processing - PXCLK for pipeline 0: output pixel clock for pipeline 0 - PXCLK for pipeline 1: output pixel clock for pipeline 1 So one ACLK is enough, no need to split it to three mclk/pclk/axiclk. Signed-off-by: James Qian Wang (Arm Technology China) <james.qian.wang@arm.com> Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>
79 lines
2.2 KiB
Plaintext
79 lines
2.2 KiB
Plaintext
Device Tree bindings for Arm Komeda display driver
|
|
|
|
Required properties:
|
|
- compatible: Should be "arm,mali-d71"
|
|
- reg: Physical base address and length of the registers in the system
|
|
- interrupts: the interrupt line number of the device in the system
|
|
- clocks: A list of phandle + clock-specifier pairs, one for each entry
|
|
in 'clock-names'
|
|
- clock-names: A list of clock names. It should contain:
|
|
- "aclk": for the main processor clock
|
|
- #address-cells: Must be 1
|
|
- #size-cells: Must be 0
|
|
- iommus: configure the stream id to IOMMU, Must be configured if want to
|
|
enable iommu in display. for how to configure this node please reference
|
|
devicetree/bindings/iommu/arm,smmu-v3.txt,
|
|
devicetree/bindings/iommu/iommu.txt
|
|
|
|
Required properties for sub-node: pipeline@nq
|
|
Each device contains one or two pipeline sub-nodes (at least one), each
|
|
pipeline node should provide properties:
|
|
- reg: Zero-indexed identifier for the pipeline
|
|
- clocks: A list of phandle + clock-specifier pairs, one for each entry
|
|
in 'clock-names'
|
|
- clock-names: should contain:
|
|
- "pxclk": pixel clock
|
|
|
|
- port: each pipeline connect to an encoder input port. The connection is
|
|
modeled using the OF graph bindings specified in
|
|
Documentation/devicetree/bindings/graph.txt
|
|
|
|
Optional properties:
|
|
- memory-region: phandle to a node describing memory (see
|
|
Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt)
|
|
to be used for the framebuffer; if not present, the framebuffer may
|
|
be located anywhere in memory.
|
|
|
|
Example:
|
|
/ {
|
|
...
|
|
|
|
dp0: display@c00000 {
|
|
#address-cells = <1>;
|
|
#size-cells = <0>;
|
|
compatible = "arm,mali-d71";
|
|
reg = <0xc00000 0x20000>;
|
|
interrupts = <0 168 4>;
|
|
clocks = <&dpu_aclk>;
|
|
clock-names = "aclk";
|
|
iommus = <&smmu 0>, <&smmu 1>, <&smmu 2>, <&smmu 3>,
|
|
<&smmu 4>, <&smmu 5>, <&smmu 6>, <&smmu 7>,
|
|
<&smmu 8>, <&smmu 9>;
|
|
|
|
dp0_pipe0: pipeline@0 {
|
|
clocks = <&fpgaosc2>;
|
|
clock-names = "pxclk";
|
|
reg = <0>;
|
|
|
|
port {
|
|
dp0_pipe0_out: endpoint {
|
|
remote-endpoint = <&db_dvi0_in>;
|
|
};
|
|
};
|
|
};
|
|
|
|
dp0_pipe1: pipeline@1 {
|
|
clocks = <&fpgaosc2>;
|
|
clock-names = "pxclk";
|
|
reg = <1>;
|
|
|
|
port {
|
|
dp0_pipe1_out: endpoint {
|
|
remote-endpoint = <&db_dvi1_in>;
|
|
};
|
|
};
|
|
};
|
|
};
|
|
...
|
|
};
|