Re: [v2] dt-bindings: msm: disp: add yaml schemas for DPU and DSI bindings

[Rob Herring]

On Mon, Mar 09, 2020 at 03:52:46PM +0530, Krishna Manikandan wrote:
> MSM Mobile Display Subsytem(MDSS) encapsulates sub-blocks
> like DPU display controller, DSI etc. Add YAML schema
> for the device tree bindings for the same.
> 
> Signed-off-by: Krishna Manikandan <mkrishn@xxxxxxxxxxxxxx>
> 
> Changes in v2:
> 	- Changed dpu to DPU (Sam Ravnborg)
> 	- Fixed indentation issues (Sam Ravnborg)
> 	- Added empty line between different properties (Sam Ravnborg)
> 	- Replaced reference txt files with  their corresponding
> 	  yaml files (Sam Ravnborg)
> 	- Modified the file to use "|" only when it is
> 	  necessary (Sam Ravnborg)
> ---
>  .../bindings/display/msm/dpu-sc7180.yaml           | 261 +++++++++++++++
>  .../bindings/display/msm/dpu-sdm845.yaml           | 259 +++++++++++++++
>  .../bindings/display/msm/dsi-sc7180.yaml           | 362 +++++++++++++++++++++
>  .../bindings/display/msm/dsi-sdm845.yaml           | 362 +++++++++++++++++++++
>  4 files changed, 1244 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/msm/dpu-sc7180.yaml
>  create mode 100644 Documentation/devicetree/bindings/display/msm/dpu-sdm845.yaml
>  create mode 100644 Documentation/devicetree/bindings/display/msm/dsi-sc7180.yaml
>  create mode 100644 Documentation/devicetree/bindings/display/msm/dsi-sdm845.yaml
> 
> diff --git a/Documentation/devicetree/bindings/display/msm/dpu-sc7180.yaml b/Documentation/devicetree/bindings/display/msm/dpu-sc7180.yaml
> new file mode 100644
> index 0000000..2a9efc5
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/msm/dpu-sc7180.yaml
> @@ -0,0 +1,261 @@
> +# SPDX-License-Identifier: GPL-2.0-only

Dual license new bindings: (GPL-2.0-only OR BSD-2-Clause)

Though, this isn't new. You need to be removing the old dpu.txt. And 
relicense only if QCom/CA has ownership of the old file.

> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/msm/dpu-sc7180.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Description of Qualcomm Display DPU dt properties.
> +
> +maintainers:
> +  - Krishna Manikandan <mkrishn@xxxxxxxxxxxxxx>
> +
> +description: |
> +  Device tree bindings for MSM Mobile Display Subsytem(MDSS) that encapsulates
> +  sub-blocks like DPU display controller, DSI and DP interfaces etc. Device tree
> +  bindings of MDSS and DPU are mentioned for SC7180 target.
> +
> +properties:
> +  "mdss":
> +    type: object
> +    description: |
> +      Node containing MDSS that encapsulated sub-blocks like DPU, DSI and DP
> +      interfaces.
> +
> +    properties:
> +     compatible:
> +       items:
> +         - const: qcom,sc7180-mdss
> +
> +     reg:
> +       description: Physical base address and length of controller's registers.

How many? You need 'maxItems: 1' if 1.

Drop the description. That's every 'reg' property.

> +
> +     reg-names:
> +       description: |
> +         Names for different register regions defined above. The required region
> +         is mentioned below.

Drop this.

> +       items:
> +         - const: mdss
> +
> +     power-domains:
> +       description: |
> +         A power domain consumer specifier according to
> +         Documentation/devicetree/bindings/power/power-domain.yaml.

Drop generic descriptions.

Needs to define how many?

> +
> +     clocks:
> +       description: List of clock specifiers for clocks needed by the device.

How many?

> +
> +     clock-names:
> +       description: |
> +         Device clock names in the same order as mentioned in clocks property.

There's no order defined there.

> +         The required clocks are mentioned below.
> +       items:
> +         - const: iface
> +         - const: bus
> +         - const: ahb
> +         - const: core
> +
> +     interrupts:
> +       description: Interrupt signal from MDSS.

How many?

> +
> +     interrupt-controller:
> +       description: Identifies the node as an interrupt controller.

interrupt-controller: true

> +
> +     "#interrupt-cells":
> +       description: |
> +         Specifies the number of cells needed to encode an interrupt source.

Drop

> +       const: 1
> +
> +     iommus:
> +       description: Phandle of iommu device node.

How mang?

> +
> +     "#address-cells":
> +       description: |
> +         Indicate how many cells (32 bits values) are needed to form the base
> +         address part in the reg property.

Drop.

What's the value?

> +
> +     "#size-cells":
> +       description: |
> +         Indicate how many cells (32 bits values) are needed to specify the
> +         size part in the reg property.
> +
> +     ranges:

ranges: true

> +       description: |
> +         Parent bus address space is the same as the child bus address space.
> +
> +     interconnects :

space                ^

> +       description: |
> +         Interconnect path specifier for MDSS according to
> +         Documentation/devicetree/bindings/interconnect/interconnect.txt.
> +         Should be 2 paths corresponding to 2 AXI ports.

Express as schema constraints.

> +
> +     interconnect-names:
> +       description: |
> +         MDSS will have 2 port names to differentiate between the
> +         2 interconnect paths defined with interconnect specifier.

Need to define the values.

> +
> +     properties:

You are defining that this node has a property called 'properties'...

> +       description: |
> +         The optional properties for MDSS are mentioned below.
> +         assigned-clocks:
> +           description: |
> +             List of clock specifiers for clocks needing rate assignment.
> +
> +         assigned-clock-rates:
> +           description: |
> +             List of clock frequencies sorted in the same order as the
> +             assigned-clocks property.

And this is all just description text (it doesn't do anything).

> +
> +     "mdp":
> +       type: object
> +       description: Node containing the properties of DPU.
> +
> +       properties:
> +         compatible:
> +           items:
> +             - const: qcom,sc7180-dpu
> +
> +         reg:
> +           description: |
> +             Physical base address and length of controller's registers.

Drop.

How many? And so on. I'm not going to keep repeating the same issue...

> +
> +         reg-names:
> +           description: |
> +             Register region names. The following regions are required.
> +           items:
> +             - const: mdp
> +             - const: vbif
> +
> +         clocks:
> +           description: |
> +             List of clock specifiers for clocks needed by the device.
> +
> +         clock-names:
> +           description: |
> +             Device clock names, must be in same order as clocks property.
> +             The following clocks are required. "bus" is an optional property
> +             in sc7180 due to architecture change.
> +           items:
> +             - const: iface
> +             - const: core
> +             - const: vsync
> +
> +         interrupts:
> +           description: Interrupt line from DPU to MDSS.
> +
> +         ports:
> +           type: object
> +           description: |
> +             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 in files
> +             mentioned below.
> +
> +             Documentation/devicetree/bindings/graph.txt
> +             Documentation/devicetree/bindings/media/video-interfaces.txt
> +
> +           properties:
> +             port0:

'port@0'?

> +               type: object
> +               description: DPU_INTF1 (DSI1)
> +             port1:
> +               type: object
> +               description: DPU_INTF2 (DSI2)
> +
> +         properties:
> +           description: |
> +             The optional properties for DPU are mentioned below.

Again, not how optional properties work.

> +             assigned-clocks:
> +               description: |
> +                 List of clock specifiers for clocks needing rate assignment.
> +
> +             assigned-clock-rates:
> +               description: |
> +                 List of clock frequencies sorted in the same order as the
> +                 assigned-clocks property.
> +
> +             clock-names:
> +               description: |
> +                 Optional device clocks, needed for accessing LUT blocks.
> +               items:
> +                 - const: rot
> +                 - const: lut

You need 'required' and 'additionalProperties' at this level.

> +
> +required:
> +  - compatible
> +  - reg
> +  - reg-names
> +  - power-domains
> +  - clocks
> +  - clock-names
> +  - interrupts
> +  - interrupt-controller
> +  - iommus
> +  - ports

Add:

additionalProperties: false

> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/qcom,dispcc-sc7180.h>
> +    #include <dt-bindings/clock/qcom,gcc-sc7180.h>
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    #include <dt-bindings/interconnect/qcom,sdm845.h>
> +    mdss: mdss@ae00000 {
> +         compatible = "qcom,sc7180-mdss";
> +         reg = <0xae00000 0x1000>;
> +         reg-names = "mdss";
> +         power-domains = <&clock_dispcc 0>;
> +         clocks = <&gcc GCC_DISP_AHB_CLK>,
> +                  <&gcc GCC_DISP_HF_AXI_CLK>,
> +                  <&dispcc DISP_CC_MDSS_MDP_CLK>;
> +         clock-names = "iface", "gcc_bus", "core";
> +         assigned-clocks = <&dispcc DISP_CC_MDSS_MDP_CLK>;
> +         assigned-clock-rates = <300000000>;
> +
> +         interrupts = <GIC_SPI 83 IRQ_TYPE_LEVEL_HIGH>;
> +         interrupt-controller;
> +         #interrupt-cells = <1>;
> +
> +         interconnects = <&mmss_noc MASTER_MDP0 &mc_virt SLAVE_EBI1>;
> +
> +         interconnect-names = "mdp0-mem";
> +
> +         iommus = <&apps_smmu 0x800 0x2>;
> +
> +         #address-cells = <2>;
> +         #size-cells = <2>;
> +
> +         mdss_mdp: mdp@ae01000 {
> +                   compatible = "qcom,sc7180-dpu";
> +                   reg = <0 0x0ae01000 0 0x8f000>,
> +                         <0 0x0aeb0000 0 0x2008>,
> +                         <0 0x0af03000 0 0x16>;
> +                   reg-names = "mdp", "vbif", "disp_cc";
> +
> +                   clocks = <&dispcc DISP_CC_MDSS_AHB_CLK>,
> +                            <&dispcc DISP_CC_MDSS_ROT_CLK>,
> +                            <&dispcc DISP_CC_MDSS_MDP_LUT_CLK>,
> +                            <&dispcc DISP_CC_MDSS_MDP_CLK>,
> +                            <&dispcc DISP_CC_MDSS_VSYNC_CLK>;
> +                   clock-names = "iface", "rot", "lut", "core",
> +                                                "vsync";
> +                   assigned-clocks = <&dispcc DISP_CC_MDSS_MDP_CLK>,
> +                                     <&dispcc DISP_CC_MDSS_VSYNC_CLK>;
> +                   assigned-clock-rates = <300000000>, <19200000>;
> +                   interrupt-parent = <&mdss>;
> +                   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>;
> +                                   };
> +                           };
> +                   };
> +         };
> +    };
> +...
> diff --git a/Documentation/devicetree/bindings/display/msm/dpu-sdm845.yaml b/Documentation/devicetree/bindings/display/msm/dpu-sdm845.yaml
> new file mode 100644
> index 0000000..bb975938
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/msm/dpu-sdm845.yaml
> @@ -0,0 +1,259 @@
> +# SPDX-License-Identifier: GPL-2.0-only
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/msm/dpu-sdm845.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Description of Qualcomm Display DPU dt properties.
> +
> +maintainers:
> +  - Krishna Manikandan <mkrishn@xxxxxxxxxxxxxx>
> +
> +description: |
> +  Device tree bindings for MSM Mobile Display Subsytem(MDSS) that encapsulates
> +  sub-blocks like DPU display controller, DSI and DP interfaces etc. Device tree
> +  bindings of MDSS and DPU are mentioned for SDM845 target.
> +
> +properties:
> +  "mdss":
> +    type: object
> +    description: |
> +      Node containing MDSS that encapsulated sub-blocks like DPU, DSI and DP
> +      interfaces.
> +
> +    properties:
> +     compatible:
> +       items:
> +         - const: qcom,sdm845-mdss
> +
> +     reg:
> +       description: Physical base address and length of controller's registers.
> +
> +     reg-names:
> +       description: |
> +         Names for different register regions defined above. The required region
> +         is mentioned below.
> +       items:
> +         - const: mdss
> +
> +     power-domains:
> +       description: |
> +         A power domain consumer specifier according to
> +         Documentation/devicetree/bindings/power/power-domain.yaml.
> +
> +     clocks:
> +       description: List of clock specifiers for clocks needed by the device.
> +
> +     clock-names:
> +       description: |
> +         Device clock names in the same order as mentioned in clocks property.
> +         The required clocks are mentioned below.
> +       items:
> +         - const: iface
> +         - const: bus
> +         - const: core
> +
> +     interrupts:
> +       description: Interrupt signal from MDSS.
> +
> +     interrupt-controller:
> +       description: Identifies the node as an interrupt controller.
> +
> +     "#interrupt-cells":
> +       description: |
> +         Specifies the number of cells needed to encode an interrupt source.
> +       const: 1
> +
> +     iommus:
> +       description: Phandle of iommu device node.
> +
> +     "#address-cells":
> +       description: |
> +         Indicate how many cells (32 bits values) are needed to form the base
> +         address part in the reg property.
> +
> +     "#size-cells":
> +       description: |
> +         Indicate how many cells (32 bits values) are needed to specify the
> +         size part in the reg property.
> +
> +     ranges:
> +       description: |
> +         Parent bus address space is the same as the child bus address space.
> +
> +     interconnects :
> +       description: |
> +         Interconnect path specifier for MDSS according to
> +         Documentation/devicetree/bindings/interconnect/interconnect.txt.
> +         Should be 2 paths corresponding to 2 AXI ports.
> +
> +     interconnect-names:
> +       description: |
> +         MDSS will have 2 port names to differentiate between the
> +         2 interconnect paths defined with interconnect specifier.
> +
> +     properties:
> +       description: |
> +         The optional properties for MDSS are mentioned below.
> +         assigned-clocks:
> +           description: |
> +             List of clock specifiers for clocks needing rate assignment.
> +
> +         assigned-clock-rates:
> +           description: |
> +             List of clock frequencies sorted in the same order as the
> +             assigned-clocks property.
> +
> +     "mdp":
> +       type: object
> +       description: Node containing the properties of DPU.
> +
> +       properties:
> +         compatible:
> +           items:
> +             - const: qcom,sc7180-dpu
> +
> +         reg:
> +           description: |
> +             Physical base address and length of controller's registers.
> +
> +         reg-names:
> +           description: |
> +             Register region names. The following regions are required.
> +           items:
> +             - const: mdp
> +             - const: vbif
> +
> +         clocks:
> +           description: |
> +             List of clock specifiers for clocks needed by the device.
> +
> +         clock-names:
> +           description: |
> +             Device clock names, must be in same order as clocks property.
> +             The following clocks are required.
> +           items:
> +             - const: bus
> +             - const: iface
> +             - const: core
> +             - const: vsync
> +
> +         interrupts:
> +           description: Interrupt line from DPU to MDSS.
> +
> +         ports:
> +           type: object
> +           description: |
> +             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 in files
> +             mentioned below.
> +
> +             Documentation/devicetree/bindings/graph.txt
> +             Documentation/devicetree/bindings/media/video-interfaces.txt
> +
> +           properties:
> +             port0:
> +               type: object
> +               description: DPU_INTF1 (DSI1)
> +             port1:
> +               type: object
> +               description: DPU_INTF2 (DSI2)
> +
> +         properties:
> +           description: |
> +             The optional properties for DPU are mentioned below.
> +             assigned-clocks:
> +               description: |
> +                 List of clock specifiers for clocks needing rate assignment.
> +
> +             assigned-clock-rates:
> +               description: |
> +                 List of clock frequencies sorted in the same order as the
> +                 assigned-clocks property.
> +
> +
> +required:
> +  - compatible
> +  - reg
> +  - reg-names
> +  - power-domains
> +  - clocks
> +  - clock-names
> +  - interrupts
> +  - interrupt-controller
> +  - iommus
> +  - ports
> +
> +examples:
> +- |
> +    #include <dt-bindings/clock/qcom,dispcc-sdm845.h>
> +    #include <dt-bindings/clock/qcom,gcc-sdm845.h>
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    mdss: mdss@ae00000 {
> +          compatible = "qcom,sdm845-mdss";
> +          reg = <0 0x0ae00000 0 0x1000>;
> +          reg-names = "mdss";
> +          power-domains = <&dispcc MDSS_GDSC>;
> +
> +          clocks = <&gcc GCC_DISP_AHB_CLK>,
> +                   <&gcc GCC_DISP_AXI_CLK>,
> +                   <&dispcc DISP_CC_MDSS_MDP_CLK>;
> +          clock-names = "iface", "bus", "core";
> +
> +          assigned-clocks = <&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_smmu 0x880 0x8>,
> +                   <&apps_smmu 0xc80 0x8>;
> +
> +          #address-cells = <2>;
> +          #size-cells = <2>;
> +
> +          mdss_mdp: mdp@ae01000 {
> +                    compatible = "qcom,sdm845-dpu";
> +                    reg = <0 0x0ae01000 0 0x8f000>,
> +                          <0 0x0aeb0000 0 0x2008>;
> +                    reg-names = "mdp", "vbif";
> +
> +                    clocks = <&dispcc DISP_CC_MDSS_AHB_CLK>,
> +                             <&dispcc DISP_CC_MDSS_AXI_CLK>,
> +                             <&dispcc DISP_CC_MDSS_MDP_CLK>,
> +                             <&dispcc DISP_CC_MDSS_VSYNC_CLK>;
> +                    clock-names = "iface", "bus", "core", "vsync";
> +
> +                    assigned-clocks = <&dispcc DISP_CC_MDSS_MDP_CLK>,
> +                                      <&dispcc DISP_CC_MDSS_VSYNC_CLK>;
> +                    assigned-clock-rates = <300000000>,
> +                                           <19200000>;
> +
> +                    interrupt-parent = <&mdss>;
> +                    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>;
> +                                   };
> +                           };
> +                    };
> +          };
> +    };
> +...
> diff --git a/Documentation/devicetree/bindings/display/msm/dsi-sc7180.yaml b/Documentation/devicetree/bindings/display/msm/dsi-sc7180.yaml
> new file mode 100644
> index 0000000..4727205
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/msm/dsi-sc7180.yaml
> @@ -0,0 +1,362 @@
> +# SPDX-License-Identifier: GPL-2.0-only
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/msm/dsi-sc7180.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Description of Qualcomm Display DSI interface dt properties.
> +
> +maintainers:
> +  - Krishna Manikandan <mkrishn@xxxxxxxxxxxxxx>
> +
> +description: |
> +  Device tree bindings for DSI controller and DSI PHY for SC7180 target.

Split into 2 docs.

> +
> +properties:
> +  "dsi-controller":

dsi@...

However, you should remove this level.

And you should reference dsi-controller.yaml.

> +    type: object
> +    description: Node containing the properties of DSI controller.
> +
> +    properties:
> +      compatible:
> +        items:
> +          - const: qcom,mdss-dsi-ctrl
> +
> +      reg:
> +        description: Physical base address and length of registers of controller.

Same issues again...

> +
> +      reg-names:
> +        description: |
> +          Names for different register regions defined above. The required region
> +          is mentioned below.
> +        items:
> +          - const: dsi_ctrl
> +
> +      clocks:
> +        description: Phandles to device clocks.
> +
> +      clock-names:
> +        description: |
> +          Device clock names in the same order as mentioned in clocks property.
> +          The required clocks are mentioned below. For DSIv2, we need an
> +          additional clock "src" and for DSI6G v2.0 onwards we need
> +          "byte_intf" clock.
> +        items:
> +          - const: iface
> +          - const: bus
> +          - const: byte
> +          - const: pixel
> +          - const: core
> +
> +      assigned-clocks:
> +        description: Parents of "byte" and "pixel" for the given platform.
> +
> +      assigned-clock-parents:
> +        description: |
> +          The Byte clock and Pixel clock PLL outputs provided by a DSI PHY block.
> +          Details on clock bindings are mentioned in
> +          Documentation/devicetree/bindings/clock/clock-bindings.txt.
> +
> +      vdd-supply:
> +        description: Phandle to vdd regulator device node.
> +
> +      vddio-supply:
> +        description: Phandle to vdd-io regulator device node.
> +
> +      vdda-supply:
> +        description: Phandle to vdda regulator device node.
> +
> +      phys:
> +        description: Phandle to DSI PHY device node.
> +
> +      phy-names:
> +        description: Name of the corresponding PHY device.
> +
> +      syscon-sfpb:
> +        description: A phandle to mmss_sfpb syscon node (only for DSIv2).
> +
> +      ports:
> +        description: |
> +          Contains 2 DSI controller ports as child nodes. Each port contains
> +          an endpoint subnode as defined in
> +          Documentation/devicetree/bindings/graph.txt and
> +          Documentation/devicetree/bindings/media/video-interfaces.txt.
> +
> +      properties:
> +        description: |
> +          The optional properties for DSI controller are mentioned below.
> +
> +          panel@0:
> +            description: |
> +              Node of panel connected to this DSI controller.
> +              See files in Documentation/devicetree/bindings/display/panel/
> +              for each supported panel.
> +
> +          qcom,dual-dsi-mode:

Vendor specific properties need a type reference.

> +            description: |
> +              Boolean value indicating if the DSI controller is
> +              driving a panel which needs 2 DSI links.
> +
> +          qcom,master-dsi:
> +            description: |
> +              Boolean value indicating if the DSI controller is driving
> +              the master link of the 2-DSI panel.
> +
> +          qcom,sync-dual-dsi:
> +            description: |
> +              Boolean value indicating if the DSI controller is driving a
> +              2-DSI panel whose 2 links need receive command simultaneously.
> +
> +          pinctrl-names:
> +            description: The pin control state names; should contain "default"

sleep?

> +
> +          pinctrl-0:
> +            description: The default pinctrl state (active)
> +
> +          pinctrl-n:

Not a valid property name.

> +            description: The "sleep" pinctrl state
> +
> +          ports:
> +            description: |
> +              Contains DSI controller input and output ports as children, each
> +              containing one endpoint subnode.
> +
> +          properties:

The indentation is wrong so the rest of this doesn't do anything.

> +            description: DSI Endpoint properties

But you're in the 'ports' node...

> +
> +            remote-endpoint:
> +              description: |
> +                For port@0, set to phandle of the connected panel/bridge's
> +                input endpoint. For port@1, set to the MDP interface output.
> +                See Documentation/devicetree/bindings/graph.txt for
> +                device graph info.
> +
> +            data-lanes:
> +              description: |
> +                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
> +                Documentation/devicetree/bindings/media/video-interfaces.txt 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.
> +              oneOf:
> +                - const: <0 1 2 3>
> +                - const: <1 2 3 0>
> +                - const: <2 3 0 1>
> +                - const: <3 0 1 2>
> +                - const: <0 3 2 1>
> +                - const: <1 0 3 2>
> +                - const: <2 1 0 3>
> +                - const: <3 2 1 0>
> +
> +          qcom,mdss-mdp-transfer-time-us:
> +            description: |
> +              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. This is an optional property.
> +
> +  "dsi_phy":

While this needs to be removed when you make a DSI phy schema doc, I'll 
point out that it doesn't even match the example.

> +    type: object
> +    description: Node containing the properties of DSI PHY
> +
> +    properties:
> +      compatible:
> +        oneOf:
> +          - const: qcom,dsi-phy-28nm-hpm
> +          - const: qcom,dsi-phy-28nm-lp
> +          - const: qcom,dsi-phy-20nm
> +          - const: qcom,dsi-phy-28nm-8960
> +          - const: qcom,dsi-phy-14nm
> +          - const: qcom,dsi-phy-10nm
> +          - const: qcom,dsi-phy-10nm-8998
> +
> +      reg:
> +        description: |
> +          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:
> +        description: Name of register regions.
> +        oneOf:
> +          - description: |
> +              Following regions are required for DSI 28nm HPM/LP/8960 PHYs and
> +              20nm PHY.
> +            items:
> +              - const: dsi_pll
> +              - const: dsi_phy
> +              - const: dsi_phy_regulator
> +
> +          - description: |
> +              Following regions are required for DSI 14nm and 10nm PHYs:
> +            items:
> +              - const: dsi_pll
> +              - const: dsi_phy
> +              - const: dsi_phy_lane
> +
> +      clock-cells:
> +        description: |
> +          The DSI PHY block acts as a clock provider, creating
> +          2 clocks: A byte clock (index 0), and a pixel clock (index 1).
> +        const: 1
> +
> +      power-domains:
> +        description: Should be <&mmcc MDSS_GDSC>.
> +
> +      clocks:
> +        description: |
> +          Phandles to device clocks. See
> +          Documentation/devicetree/bindings/clock/clock-bindings.txt
> +          for details on clock bindings.
> +
> +      clock-names:
> +        description: |
> +          The following clocks are required.
> +          "iface"
> +          "ref" (only required for new DTS files/entries)
> +
> +      vddio-supply:
> +        description: |
> +          Phandle to vdd-io regulator device node. Required for 28nm HPM/LP,
> +          28nm 8960 PHYs and 20nm PHY.
> +
> +      vcca-supply:
> +        description: |
> +          Phandle to vcca regulator device node. Required for 20nm PHY and
> +          10nm PHY.
> +
> +      vdds-supply:
> +        description: |
> +          Phandle to vdds regulator device node. Required for 10nm PHY.
> +
> +      properties:
> +        description: |
> +          The optional properties for DSI PHY are mentioned below.
> +
> +          qcom,dsi-phy-regulator-ldo-mode:
> +            description: |
> +              Boolean value indicating if the LDO mode PHY regulator is wanted.
> +
> +examples:
> +  - |
> +     #include <dt-bindings/interrupt-controller/arm-gic.h>
> +     #include <dt-bindings/clock/qcom,dispcc-sc7180.h>
> +     #include <dt-bindings/clock/qcom,gcc-sc7180.h>
> +
> +     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>;
> +
> +           clocks = <&dispcc DISP_CC_MDSS_BYTE0_CLK>,
> +                    <&dispcc DISP_CC_MDSS_BYTE0_INTF_CLK>,
> +                    <&dispcc DISP_CC_MDSS_PCLK0_CLK>,
> +                    <&dispcc DISP_CC_MDSS_ESC0_CLK>,
> +                    <&dispcc DISP_CC_MDSS_AHB_CLK>,
> +                    <&gcc GCC_DISP_HF_AXI_CLK>;
> +           clock-names = "byte",
> +                         "byte_intf",
> +                         "pixel",
> +                         "core",
> +                         "iface",
> +                         "bus";
> +           assigned-clocks = <&dispcc DISP_CC_MDSS_BYTE0_CLK_SRC>,
> +                             <&dispcc DISP_CC_MDSS_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";
> +                  link2 = <&secondary>;
> +
> +                  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 = <&dispcc DISP_CC_MDSS_AHB_CLK>;
> +               #clock-cells = <1>;
> +               #phy-cells = <0>;
> +               vddio-supply = <&pma8084_l12>;
> +
> +               qcom,dsi-phy-regulator-ldo-mode;
> +     };
> +...
> +
> diff --git a/Documentation/devicetree/bindings/display/msm/dsi-sdm845.yaml b/Documentation/devicetree/bindings/display/msm/dsi-sdm845.yaml
> new file mode 100644
> index 0000000..e494a7f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/msm/dsi-sdm845.yaml
> @@ -0,0 +1,362 @@
> +# SPDX-License-Identifier: GPL-2.0-only
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/msm/dsi-sdm845.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Description of Qualcomm Display DSI interface dt properties.
> +
> +maintainers:
> +  - Krishna Manikandan <mkrishn@xxxxxxxxxxxxxx>
> +
> +description: |
> +  Device tree bindings for DSI controller and DSI PHY for SDM845 target.
> +
> +properties:
> +  "dsi-controller":
> +    type: object
> +    description: Node containing the properties of DSI controller.
> +
> +    properties:
> +      compatible:
> +        items:
> +          - const: qcom,mdss-dsi-ctrl
> +
> +      reg:
> +        description: Physical base address and length of registers of controller.
> +
> +      reg-names:
> +        description: |
> +          Names for different register regions defined above. The required region
> +          is mentioned below.
> +        items:
> +          - const: dsi_ctrl
> +
> +      clocks:
> +        description: Phandles to device clocks.
> +
> +      clock-names:
> +        description: |
> +          Device clock names in the same order as mentioned in clocks property.
> +          The required clocks are mentioned below. For DSIv2, we need an
> +          additional clock "src" and for DSI6G v2.0 onwards we need
> +          "byte_intf" clock.
> +        items:
> +          - const: iface
> +          - const: bus
> +          - const: byte
> +          - const: pixel
> +          - const: core
> +
> +      assigned-clocks:
> +        description: Parents of "byte" and "pixel" for the given platform.
> +
> +      assigned-clock-parents:
> +        description: |
> +          The Byte clock and Pixel clock PLL outputs provided by a DSI PHY block.
> +          Details on clock bindings are mentioned in
> +          Documentation/devicetree/bindings/clock/clock-bindings.txt.
> +
> +      vdd-supply:
> +        description: Phandle to vdd regulator device node.
> +
> +      vddio-supply:
> +        description: Phandle to vdd-io regulator device node.
> +
> +      vdda-supply:
> +        description: Phandle to vdda regulator device node.
> +
> +      phys:
> +        description: Phandle to DSI PHY device node.
> +
> +      phy-names:
> +        description: Name of the corresponding PHY device.
> +
> +      syscon-sfpb:
> +        description: A phandle to mmss_sfpb syscon node (only for DSIv2).
> +
> +      ports:
> +        description: |
> +          Contains 2 DSI controller ports as child nodes. Each port contains
> +          an endpoint subnode as defined in
> +          Documentation/devicetree/bindings/graph.txt and
> +          Documentation/devicetree/bindings/media/video-interfaces.txt.
> +
> +      properties:
> +        description: |
> +          The optional properties for DSI controller are mentioned below.
> +
> +          panel@0:
> +            description: |
> +              Node of panel connected to this DSI controller.
> +              See files in Documentation/devicetree/bindings/display/panel/
> +              for each supported panel.
> +
> +          qcom,dual-dsi-mode:
> +            description: |
> +              Boolean value indicating if the DSI controller is
> +              driving a panel which needs 2 DSI links.
> +
> +          qcom,master-dsi:
> +            description: |
> +              Boolean value indicating if the DSI controller is driving
> +              the master link of the 2-DSI panel.
> +
> +          qcom,sync-dual-dsi:
> +            description: |
> +              Boolean value indicating if the DSI controller is driving a
> +              2-DSI panel whose 2 links need receive command simultaneously.
> +
> +          pinctrl-names:
> +            description: The pin control state names; should contain "default"
> +
> +          pinctrl-0:
> +            description: The default pinctrl state (active)
> +
> +          pinctrl-n:
> +            description: The "sleep" pinctrl state
> +
> +          ports:
> +            description: |
> +              Contains DSI controller input and output ports as children, each
> +              containing one endpoint subnode.
> +
> +          properties:
> +            description: DSI Endpoint properties
> +
> +            remote-endpoint:
> +              description: |
> +                For port@0, set to phandle of the connected panel/bridge's
> +                input endpoint. For port@1, set to the MDP interface output.
> +                See Documentation/devicetree/bindings/graph.txt for
> +                device graph info.
> +
> +            data-lanes:
> +              description: |
> +                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
> +                Documentation/devicetree/bindings/media/video-interfaces.txt 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.
> +              oneOf:
> +                - const: <0 1 2 3>
> +                - const: <1 2 3 0>
> +                - const: <2 3 0 1>
> +                - const: <3 0 1 2>
> +                - const: <0 3 2 1>
> +                - const: <1 0 3 2>
> +                - const: <2 1 0 3>
> +                - const: <3 2 1 0>
> +
> +          qcom,mdss-mdp-transfer-time-us:
> +            description: |
> +              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. This is an optional property.
> +
> +  "dsi_phy":
> +    type: object
> +    description: Node containing the properties of DSI PHY
> +
> +    properties:
> +      compatible:
> +        oneOf:
> +          - const: qcom,dsi-phy-28nm-hpm
> +          - const: qcom,dsi-phy-28nm-lp
> +          - const: qcom,dsi-phy-20nm
> +          - const: qcom,dsi-phy-28nm-8960
> +          - const: qcom,dsi-phy-14nm
> +          - const: qcom,dsi-phy-10nm
> +          - const: qcom,dsi-phy-10nm-8998
> +
> +      reg:
> +        description: |
> +          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:
> +        description: Name of register regions.
> +        oneOf:
> +          - description: |
> +              Following regions are required for DSI 28nm HPM/LP/8960 PHYs and
> +              20nm PHY.
> +            items:
> +              - const: dsi_pll
> +              - const: dsi_phy
> +              - const: dsi_phy_regulator
> +
> +          - description: |
> +              Following regions are required for DSI 14nm and 10nm PHYs:
> +            items:
> +              - const: dsi_pll
> +              - const: dsi_phy
> +              - const: dsi_phy_lane
> +
> +      clock-cells:
> +        description: |
> +          The DSI PHY block acts as a clock provider, creating
> +          2 clocks: A byte clock (index 0), and a pixel clock (index 1).
> +        const: 1
> +
> +      power-domains:
> +        description: Should be <&mmcc MDSS_GDSC>.
> +
> +      clocks:
> +        description: |
> +          Phandles to device clocks. See
> +          Documentation/devicetree/bindings/clock/clock-bindings.txt
> +          for details on clock bindings.
> +
> +      clock-names:
> +        description: |
> +          The following clocks are required.
> +          "iface"
> +          "ref" (only required for new DTS files/entries)
> +
> +      vddio-supply:
> +        description: |
> +          Phandle to vdd-io regulator device node. Required for 28nm HPM/LP,
> +          28nm 8960 PHYs and 20nm PHY.
> +
> +      vcca-supply:
> +        description: |
> +          Phandle to vcca regulator device node. Required for 20nm PHY and
> +          10nm PHY.
> +
> +      vdds-supply:
> +        description: |
> +          Phandle to vdds regulator device node. Required for 10nm PHY.
> +
> +      properties:
> +        description: |
> +          The optional properties for DSI PHY are mentioned below.
> +
> +          qcom,dsi-phy-regulator-ldo-mode:
> +            description: |
> +              Boolean value indicating if the LDO mode PHY regulator is wanted.
> +
> +examples:
> +  - |
> +     #include <dt-bindings/interrupt-controller/arm-gic.h>
> +     #include <dt-bindings/clock/qcom,dispcc-sdm845.h>
> +     #include <dt-bindings/clock/qcom,gcc-sdm845.h>
> +
> +     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>;
> +
> +           clocks = <&dispcc DISP_CC_MDSS_BYTE0_CLK>,
> +                    <&dispcc DISP_CC_MDSS_BYTE0_INTF_CLK>,
> +                    <&dispcc DISP_CC_MDSS_PCLK0_CLK>,
> +                    <&dispcc DISP_CC_MDSS_ESC0_CLK>,
> +                    <&dispcc DISP_CC_MDSS_AHB_CLK>,
> +                    <&dispcc DISP_CC_MDSS_AXI_CLK>;
> +           clock-names = "byte",
> +                         "byte_intf",
> +                         "pixel",
> +                         "core",
> +                         "iface",
> +                         "bus";
> +           assigned-clocks = <&dispcc DISP_CC_MDSS_BYTE0_CLK_SRC>,
> +                             <&dispcc DISP_CC_MDSS_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";
> +                  link2 = <&secondary>;
> +
> +                  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 = <&dispcc DISP_CC_MDSS_AHB_CLK>;
> +               #clock-cells = <1>;
> +               #phy-cells = <0>;
> +               vddio-supply = <&pma8084_l12>;
> +
> +               qcom,dsi-phy-regulator-ldo-mode;
> +     };
> +...
> +
> -- 
> 1.9.1
>