diff options
| author | Dmitry Baryshkov <dmitry.baryshkov@linaro.org> | 2023-08-17 18:08:23 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-08-22 15:45:53 +0300 |
| commit | 0bd9e0219bf0764149eb83826c774162c09e74de (patch) | |
| tree | 2324372da141cf927a5ff97258e09507e57270c1 /drivers/usb | |
| parent | ae257611573cde279d31be3961a59e255f567fb0 (diff) | |
| download | linux-0bd9e0219bf0764149eb83826c774162c09e74de.tar.xz | |
usb: typec: altmodes/displayport: add support for embedded DP cases
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>
Link: https://lore.kernel.org/r/20230817150824.14371-2-dmitry.baryshkov@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/typec/altmodes/displayport.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/usb/typec/altmodes/displayport.c b/drivers/usb/typec/altmodes/displayport.c index cdf8261e22db..426c88a516e5 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; |