Hi Hans,
On Wednesday 02 Aug 2017 08:47:23 Hans Verkuil wrote:
> On 08/02/2017 12:32 AM, Laurent Pinchart wrote:
> >> +
> >> + cec_register_cec_notifier(cec->adap, cec->notify);
> >> +
> >> + return 0;
> >> +}
> >> +
> >> +static int dw_hdmi_cec_remove(struct platform_device *pdev)
> >> +{
> >> + struct dw_hdmi_cec *cec = platform_get_drvdata(pdev);
> >> +
> >> + cec_unregister_adapter(cec->adap);
> >> + cec_notifier_put(cec->notify);
> >> +
> >> + return 0;
> >> +}
> >> +
> >> +static struct platform_driver dw_hdmi_cec_driver = {
> >> + .probe = dw_hdmi_cec_probe,
> >> + .remove = dw_hdmi_cec_remove,
> >> + .driver = {
> >> + .name = "dw-hdmi-cec",
> >> + },
> >> +};
> >> +module_platform_driver(dw_hdmi_cec_driver);
> >
> > Is there a particular reason why this has to be a separate module instead
> > of simply calling the CEC init/cleanup functions directly from the main
> > dw-hdmi driver ?
>
> Not all SoCs that use dw-hdmi also use the dw-hdmi CEC implementation. Some
> use their own implementation (amlogic).
Lovely. Of course we need to reinvent the wheel every time, where would the
fun be otherwise ?
> So by implementing the cec-notifier in the dw-hdmi driver and keeping dw-
> hdmi CEC separate you can easily choose whether or not you want to use this
> CEC driver or another SoC CEC driver.
I'm certainly fine with such a split, but I don't think it requires a separate
platform_driver. We could use a similar approach as with the HDMI PHY that can
also differ between SoCs. The PHY is identified at runtime when possible, and
the SoC-specific glue code can override that with a few data fields and
function pointers.
> >> +MODULE_AUTHOR("Russell King <rmk+ker...@armlinux.org.uk>");
> >> +MODULE_DESCRIPTION("Synopsys Designware HDMI CEC driver for i.MX");
> >> +MODULE_LICENSE("GPL");
> >> +MODULE_ALIAS(PLATFORM_MODULE_PREFIX "dw-hdmi-cec");
--
Regards,
Laurent Pinchart
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