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SubjectRe: [PATCH RFC 5/8] dt-bindings: display: add Unisoc's mipi dsi&dphy bindings
On Tue, Dec 10, 2019 at 04:36:32PM +0800, Kevin Tang wrote:
> From: Kevin Tang <kevin.tang@unisoc.com>
>
> Adds MIPI DSI Master and MIPI DSI-PHY (D-PHY)
> support for Unisoc's display subsystem.
>
> Cc: Orson Zhai <orsonzhai@gmail.com>
> Cc: Baolin Wang <baolin.wang@linaro.org>
> Cc: Chunyan Zhang <zhang.lyra@gmail.com>
> Signed-off-by: Kevin Tang <kevin.tang@unisoc.com>
> ---
> .../devicetree/bindings/display/sprd/dphy.txt | 49 ++++++++++++++++
> .../devicetree/bindings/display/sprd/dsi.txt | 68 ++++++++++++++++++++++
> 2 files changed, 117 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/display/sprd/dphy.txt
> create mode 100644 Documentation/devicetree/bindings/display/sprd/dsi.txt
>
> diff --git a/Documentation/devicetree/bindings/display/sprd/dphy.txt b/Documentation/devicetree/bindings/display/sprd/dphy.txt
> new file mode 100644
> index 0000000..474c2b2
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/sprd/dphy.txt
> @@ -0,0 +1,49 @@
> +Unisoc MIPI DSI-PHY (D-PHY)
> +============================================================================
> +
> +Required properties:
> + - compatible: value should be "sprd,dsi-phy".
> + - reg: must be the dsi controller base address.
> + - #address-cells, #size-cells: should be set respectively to <1> and <0>
> +
> +Video interfaces:
> + Device node can contain video interface port nodes according to [1].
> + The following are properties specific to those nodes:
> +
> + port node inbound:
> + - reg: (required) must be 0.
> + port node outbound:
> + - reg: (required) must be 1.
> +
> + endpoint node connected from DSI controller node (reg = 0):
> + - remote-endpoint: specifies the endpoint in DSI node.
> + endpoint node connected to panel node (reg = 1):
> + - remote-endpoint: specifies the endpoint in panel node.
> +
> +[1]: Documentation/devicetree/bindings/media/video-interfaces.txt
> +
> +
> +Example:
> +
> + dphy: dphy {
> + compatible = "sprd,dsi-phy";
> + reg = <0x0 0x63100000 0x0 0x1000>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + /* input port*/
> + port@1 {
> + reg = <1>;
> + dphy_in: endpoint {
> + remote-endpoint = <&dsi_out>;
> + };
> + };
> +
> + /* output port */
> + port@0 {
> + reg = <0>;
> + dphy_out: endpoint {
> + remote-endpoint = <&panel_in>;
> + };
> + };
> + };

There's support for the MIPI D-PHY in the Linux PHY framework now, so
it would be a good fit for this (and that would mean using the generic
PHY bindings too.

> diff --git a/Documentation/devicetree/bindings/display/sprd/dsi.txt b/Documentation/devicetree/bindings/display/sprd/dsi.txt
> new file mode 100644
> index 0000000..1719ff5
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/sprd/dsi.txt
> @@ -0,0 +1,68 @@
> +Unisoc MIPI DSI Master
> +=============================================================================
> +
> +Required properties:
> + - compatible: value should be "sprd,dsi-host";
> + - reg: physical base address and length of the registers set for the device
> + - interrupts: should contain DSI interrupt
> + - clocks: list of clock specifiers, must contain an entry for each required
> + entry in clock-names
> + - clock-names: list of clock names sorted in the same order as the clocks
> + property.

Again, a list of the expected clock names and what they represent
would be great here.

Thanks!
Maxime
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