Re: [PATCH v7 5/8] dt-bindings: display: add i.MX6 MIPI DSI host controller doc

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On Wed, 22 Apr 2020, Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> wrote:
Hi Adrian, Thank you for the patch. On Tue, Apr 21, 2020 at 07:16:07PM +0300, Adrian Ratiu wrote:
This provides an example DT binding for the MIPI DSI host controller present on the i.MX6 SoC based on Synopsis DesignWare v1.01 IP. Cc: Rob Herring <robh@xxxxxxxxxx> Cc: Neil Armstrong <narmstrong@xxxxxxxxxxxx> Cc: Fabio Estevam <festevam@xxxxxxxxx> Cc: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> Cc: devicetree@xxxxxxxxxxxxxxx Tested-by: Adrian Pop <pop.adrian61@xxxxxxxxx> Tested-by: Arnaud Ferraris <arnaud.ferraris@xxxxxxxxxxxxx> Signed-off-by: Sjoerd Simons <sjoerd.simons@xxxxxxxxxxxxx> Signed-off-by: Martyn Welch <martyn.welch@xxxxxxxxxxxxx> Signed-off-by: Adrian Ratiu <adrian.ratiu@xxxxxxxxxxxxx> --- Changes since v6: - Added ref to the newly created snps,dw-mipi-dsi.yaml (Laurent) - Moved *-cells properties outside patternProperties (Laurent) - Removed the panel port documentation (Laurent) - Wrapped lines at 80 chars, typo fixes, sort includes (Laurent) Changes since v5: - Fixed missing reg warning (Fabio) - Updated dt-schema and fixed warnings (Rob) Changes since v4: - Fixed yaml binding to pass `make dt_binding_check dtbs_check` and addressed received binding feedback (Rob) Changes since v3: - Added commit message (Neil) - Converted to yaml format (Neil) - Minor dt node + driver fixes (Rob) - Added small panel example to the host controller binding Changes since v2: - Fixed commit tags (Emil) --- .../display/imx/fsl,mipi-dsi-imx6.yaml | 135 ++++++++++++++++++ 1 file changed, 135 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,mipi-dsi-imx6.yaml diff --git a/Documentation/devicetree/bindings/display/imx/fsl,mipi-dsi-imx6.yaml b/Documentation/devicetree/bindings/display/imx/fsl,mipi-dsi-imx6.yaml new file mode 100644 index 0000000000000..b73e3ae33a852 --- /dev/null +++ b/Documentation/devicetree/bindings/display/imx/fsl,mipi-dsi-imx6.yaml @@ -0,0 +1,135 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/display/imx/fsl,mipi-dsi-imx6.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Freescale i.MX6 DW MIPI DSI Host Controller + +maintainers: + - Adrian Ratiu <adrian.ratiu@xxxxxxxxxxxxx> + +description: | + The i.MX6 DSI host controller is a Synopsys DesignWare MIPI DSI v1.01 + IP block with a companion PHY IP. + + These DT bindings follow the Synopsys DW MIPI DSI bindings defined in + Documentation/devicetree/bindings/display/bridge/dw_mipi_dsi.txt with + the following device-specific properties. + +allOf: + - $ref: ../bridge/snps,dw-mipi-dsi.yaml# + +properties: + '#address-cells': + const: 1 + + '#size-cells': + const: 0 + + compatible: + items: + - const: fsl,imx6q-mipi-dsi + - const: snps,dw-mipi-dsi + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + clocks: + items: + - description: Module Clock + - description: DSI bus clock + + clock-names: + items: + - const: ref + - const: pclk + + fsl,gpr: + description: + Phandle to the iomuxc-gpr region containing the multiplexer ctrl register. + $ref: /schemas/types.yaml#/definitions/phandle + + ports: + type: object + description: | + A node containing DSI input & output port nodes with endpoint + definitions as documented in + Documentation/devicetree/bindings/media/video-interfaces.txt + Documentation/devicetree/bindings/graph.txt + properties: + port@0: + type: object + description: + DSI input port node, connected to the ltdc rgb output port. + + port@1: + type: object + description: + RGB output port node, connected to a panel or a bridge input port.

Isn't it the other way around, doesn't the bridge take RGB input and output DSI ? And to be precise, it's not about RGB, but about the input being parallel interface (DSI will also carry RGB). I would add required: - port@0 - port@1

Sorry for the confusions and omissions :) Will fix the names to avoid ambiguities and also add the required property and the missing port@0 in the example below in v8.

Many thanks,
Adrian


+
+additionalProperties: false
+
+patternProperties:
+  "^panel@[0-3]$":
+    type: object
+
+required:
+  - "#address-cells"
+  - "#size-cells"
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+  - ports
+
+examples:
+  - |+
+    #include <dt-bindings/clock/imx6qdl-clock.h>
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    dsi: dsi@21e0000 {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        compatible = "fsl,imx6q-mipi-dsi", "snps,dw-mipi-dsi";
+        reg = <0x021e0000 0x4000>;
+        interrupts = <0 102 IRQ_TYPE_LEVEL_HIGH>;
+        fsl,gpr = <&gpr>;
+        clocks = <&clks IMX6QDL_CLK_MIPI_CORE_CFG>,
+                 <&clks IMX6QDL_CLK_MIPI_IPG>;
+        clock-names = "ref", "pclk";
+
+        ports {
+            #address-cells = <1>;
+            #size-cells = <0>;

port@0 is missing.

+            port@1 {
+                reg = <1>;
+                dsi_out: endpoint {
+                    remote-endpoint = <&panel_in>;
+                };
+            };
+        };
+
+        panel@0 {
+            compatible = "sharp,ls032b3sx01";
+            reg = <0>;
+            reset-gpios = <&gpio6 8 GPIO_ACTIVE_LOW>;
+            ports {
+                #address-cells = <1>;
+                #size-cells = <0>;
+                port@0 {
+                    reg = <0>;
+                    panel_in: endpoint {
+                        remote-endpoint = <&dsi_out>;
+                    };
+                };
+            };
+        };
+    };
+
+...

--
Regards,

Laurent Pinchart
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