[PATCH v3 11/14] phy: qcom: qmp-usbc: Finalize USB/DP switchable PHY support

[Dmitry Baryshkov]

On Wed, Aug 27, 2025 at 08:34:39PM +0800, Xiangxu Yin wrote:
> 
> On 8/20/2025 7:42 PM, Dmitry Baryshkov wrote:
> > On Wed, Aug 20, 2025 at 05:34:53PM +0800, Xiangxu Yin wrote:
> >> Complete USB/DP switchable PHY integration by adding DP clock
> >> registration, aux bridge setup, and DT parsing. Implement clock
> >> provider logic for USB and DP branches, and extend PHY translation
> >> to support both USB and DP instances.
> >>
> >> Signed-off-by: Xiangxu Yin <xiangxu.yin at oss.qualcomm.com>
> >> ---
> >>  drivers/phy/qualcomm/phy-qcom-qmp-usbc.c | 331 ++++++++++++++++++++++++++++---
> >>  1 file changed, 299 insertions(+), 32 deletions(-)
> >>
> >>  static int qmp_usbc_probe(struct platform_device *pdev)
> >>  {
> >>  	struct device *dev = &pdev->dev;
> >> @@ -1703,16 +1944,32 @@ static int qmp_usbc_probe(struct platform_device *pdev)
> >>  	if (ret)
> >>  		return ret;
> >>  
> >> -	/* Check for legacy binding with child node. */
> >> -	np = of_get_child_by_name(dev->of_node, "phy");
> >> -	if (np) {
> >> -		ret = qmp_usbc_parse_usb_dt_legacy(qmp, np);
> >> -	} else {
> >> +	if (qmp->cfg->type == QMP_PHY_USBC_USB3_DP) {
> > Should not be necessary.
> 
> 
> Got it. I’ll merge the parsing logic into a single qmp_usbc_parse_dt function.
> 
> Also, I checked the compatible strings in the dtsi files for this PHY series
> looks like no current product uses the legacy binding. 
> I’ll drop qmp_usbc_parse_usb_dt_legacy in the next version.


No. It's _legacy_, it has been implemented in order to support old DTs,
which existed at some point but then were refactored into the current
state. You can't randomly drop DT support.

> 
> 
> >>  		np = of_node_get(dev->of_node);
> >> -		ret = qmp_usbc_parse_usb_dt(qmp);
> >> +
> >> +		ret = qmp_usbc_parse_usb3dp_dt(qmp);
> >> +		if (ret) {
> >> +			dev_err(qmp->dev, "parse DP dt fail ret=%d\n", ret);
> >> +			goto err_node_put;
> >> +		}
> >> +
> >> +		ret = drm_aux_bridge_register(dev);
> >> +		if (ret) {
> >> +			dev_err(qmp->dev, "aux bridge reg fail ret=%d\n", ret);
> >> +			goto err_node_put;
> >> +		}

-- 
With best wishes
Dmitry