[v2 1/4] dt-bindings: display: Add DT bindings for LS1028A HDP-TX PHY.
robh at kernel.org
Mon Aug 12 23:29:34 UTC 2019
On Fri, Jul 19, 2019 at 06:09:39PM +0800, Wen He wrote:
> Add DT bindings documentmation for the HDP-TX PHY controller. The describes
> which could be found on NXP Layerscape ls1028a platform.
Not required, but please consider converting to DT schema (YAML) format.
> Signed-off-by: Wen He <wen.he_1 at nxp.com>
> change in v2:
> - correction the node name.
> .../devicetree/bindings/display/fsl,hdp.txt | 56 +++++++++++++++++++
> 1 file changed, 56 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/display/fsl,hdp.txt
> diff --git a/Documentation/devicetree/bindings/display/fsl,hdp.txt b/Documentation/devicetree/bindings/display/fsl,hdp.txt
> new file mode 100644
> index 000000000000..53ca08337587
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/fsl,hdp.txt
> @@ -0,0 +1,56 @@
> +NXP Layerscpae ls1028a HDP-TX PHY Controller
> +The following bindings describe the Cadence HDP TX PHY on ls1028a that
> +offer multi-protocol support of standars such as eDP and Displayport,
and another typo.
> +supports for 25-600MHz pixel clock and up to 4k2k at 60MHz resolution.
> +The HDP transmitter is a Cadence HDP TX controller IP with a companion
> +PHY IP.
> +Required properties:
> + - compatible: Should be "fsl,ls1028a-dp" for ls1028a.
> + - reg: Physical base address and size of the block of registers used
> + by the processor.
The example shows 2 regions, what are they?
> + - interrupts: HDP hotplug in/out detect interrupt number
> + - 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:
> + - "clk_ipg": inter-Integrated circuit clock
> + - "clk_core": for the Main Display TX controller clock
> + - "clk_pxl": for the pixel clock feeding the output PLL of the processor
> + - "clk_pxl_mux": for the high PerfPLL bypass clock
> + - "clk_pxl_link": for the link rate pixel clock
> + - "clk_apb": for the APB interface clock
> + - "clk_vif": for the Video pixel clock
'clk_' is redundant.
> +Required sub-nodes:
> + - port: The HDP connection to an encoder output port. The connection
> + is modelled using the OF graph bindings specified in
> + Documentation/devicetree/bindings/graph.txt
I'm still confused as to what this block does? The 'encoder output' is
DisplayPort? If this is just a phy, then use the phy binding.
Normally, a DisplayPort encoder/bridge OF graph output would be
connected to a DP connector node or a panel.
More information about the dri-devel