Hi,
If the system firmware supplies device nodes representing the display connectors on integrated video hardware, those nodes should probable always be associated with the display connector entries (struct drm_connector).
With the USB Type-C DisplayPort alt mode, we will need a way to inform the correct drm connector entry about HPD IRQ, lane counts and other details. In ACPI (and most likely in DT too) the device node representing a DisplayPort behind USB Type-C connector should have a reference to the device node representing the USB Type-C connector (or vise versa). Once we have associated the DP connector device nodes with the drm connector entries, we can use those references to find the correct drm connector that the information the USB Type-C drivers are sending is meant for.
Because I think the connector firmware nodes should be associated with the connector entries in any case (those nodes do seem to be supplying the connectors all kinds of resources, not only references to other components), I'm proposing this now instead of waiting for the USB Type-C patches.
thanks,
Heikki Krogerus (2): drm: Add fwnode member to the struct drm_connector drm/i915: Associate ACPI connector nodes with connector entries
drivers/gpu/drm/drm_sysfs.c | 49 +++++++++++++++++++--------- drivers/gpu/drm/i915/intel_display.c | 40 +++++++++++++++++++++++ include/drm/drm_connector.h | 2 ++ 3 files changed, 76 insertions(+), 15 deletions(-)