[PATCH v15 06/12] dt-bindings: add document for dw_hdmi

[Philipp Zabel]

Hi Andy,

Am Mittwoch, den 03.12.2014, 08:54 +0800 schrieb Andy Yan:
> >> +Required properities:
> >> +- compatible: platform specific such as:
> >> +   * "fsl,imx6q-hdmi"
> >> +   * "fsl,imx6dl-hdmi"
> >> +   * "rockchip,rk3288-dw-hdmi"
> > I think we should add a common compatible value "snps,dw-hdmi-tx" here:
> >
> > 	compatible = "fsl,imx6q-hdmi", "snps,dw-hdmi-tx";
> >
>       How about "snps,dw-hdmi", because the driver is not only about
>    hdmi tx, but also include hdmi phy.

Synopsys call the whole module
"DesignWare HDMI Transmitter (TX) IP Solution":

https://www.synopsys.com/dw/ipdir.php?ds=dwc_hdmi_14_csds_tx
https://www.synopsys.com/dw/ipdir.php?ds=dwc_hdmi_20_csds_tx

That includes the PHY. I'd prefer keeping the -tx in there to
differentiate from a possible future "snps,dw-hdmi-rx":

https://www.synopsys.com/dw/ipdir.php?ds=dwc_hdmi_14_csds_rx
https://www.synopsys.com/dw/ipdir.php?ds=dwc_hdmi_20_csds_rx

>        If we add such compatible value, do we have to implement another
>     platform driver like dw_hdmi-pltfm.c with the 
> compatible="snps,dw-hdmi" ,
>     or just include the compatible value in dw_hdmi-imx.c and 
> dw_hdmi-rockchip.c?

That common compatible doesn't have to be used by any driver. It's just
there to show these are the same/similar IP core.
If a common driver without any SoC specific knowledge could be written,
that one would match against the common compatible.

regards
Philipp