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authorDmitry Baryshkov <dmitry.baryshkov@linaro.org>2023-08-17 18:08:23 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2023-08-22 15:45:53 +0300
commit0bd9e0219bf0764149eb83826c774162c09e74de (patch)
tree2324372da141cf927a5ff97258e09507e57270c1 /drivers/usb
parentae257611573cde279d31be3961a59e255f567fb0 (diff)
downloadlinux-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.c5
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;