| Message ID | 20230817150824.14371-2-dmitry.baryshkov@linaro.org |
|---|---|
| State | New |
| Headers | show |
| Series | usb: typec: qcom-pmic-typec: enable DP support | expand |
On Thu, Aug 17, 2023 at 06:08:23PM +0300, Dmitry Baryshkov wrote: > In the embedded cases, the DisplayPort connector is handled by the TCPM > itself. It was proposed to add the "displayport" OF property to the DT > bindings, but it was rejected in favour of properly describing the > electrical signal path using of_graph. > > Fallback to the controller fwnode for HPD notifications to > support such usecases without requiring additional DT properties. > > Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> > --- > drivers/usb/typec/altmodes/displayport.c | 5 ++++- > 1 file changed, 4 insertions(+), 1 deletion(-) > > diff --git a/drivers/usb/typec/altmodes/displayport.c b/drivers/usb/typec/altmodes/displayport.c > index bc4af130940d..a4cf1045b535 100644 > --- a/drivers/usb/typec/altmodes/displayport.c > +++ b/drivers/usb/typec/altmodes/displayport.c > @@ -594,7 +594,10 @@ int dp_altmode_probe(struct typec_altmode *alt) > alt->ops = &dp_altmode_ops; > > fwnode = dev_fwnode(alt->dev.parent->parent); /* typec_port fwnode */ > - dp->connector_fwnode = fwnode_find_reference(fwnode, "displayport", 0); > + if (fwnode_property_present(fwnode, "displayport")) > + dp->connector_fwnode = fwnode_find_reference(fwnode, "displayport", 0); > + else > + dp->connector_fwnode = fwnode_handle_get(fwnode); /* embedded DP */ > if (IS_ERR(dp->connector_fwnode)) > dp->connector_fwnode = NULL; > > -- > 2.39.2
diff --git a/drivers/usb/typec/altmodes/displayport.c b/drivers/usb/typec/altmodes/displayport.c index bc4af130940d..a4cf1045b535 100644 --- a/drivers/usb/typec/altmodes/displayport.c +++ b/drivers/usb/typec/altmodes/displayport.c @@ -594,7 +594,10 @@ int dp_altmode_probe(struct typec_altmode *alt) alt->ops = &dp_altmode_ops; fwnode = dev_fwnode(alt->dev.parent->parent); /* typec_port fwnode */ - dp->connector_fwnode = fwnode_find_reference(fwnode, "displayport", 0); + if (fwnode_property_present(fwnode, "displayport")) + dp->connector_fwnode = fwnode_find_reference(fwnode, "displayport", 0); + else + dp->connector_fwnode = fwnode_handle_get(fwnode); /* embedded DP */ if (IS_ERR(dp->connector_fwnode)) dp->connector_fwnode = NULL;
In the embedded cases, the DisplayPort connector is handled by the TCPM itself. It was proposed to add the "displayport" OF property to the DT bindings, but it was rejected in favour of properly describing the electrical signal path using of_graph. Fallback to the controller fwnode for HPD notifications to support such usecases without requiring additional DT properties. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> --- drivers/usb/typec/altmodes/displayport.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)