Hi Hans,
This is RFC, so not CCing everybody who should be CCd yet.
I spend a bit of time on thinking how could we use real fwnode
references instead of that string you proposed in order to hook up the
USB Type-C connector with the DisplayPort connector. This is what I
came up with. I was planning on introducing the references to software
nodes in any case like I mentioned before.
I'm not yet adding any sub-nodes for the DP alt mode. I'm just
assigning references to all the relevant components (nodes) for the
USB Type-C connector node. I think that the reference to the
DisplayPort should be assigned to the USB Type-C connector and not
to the alt mode sub-node.
Using these you should be able to add that notifier, and in it just
get the reference to the correct DisplayPort node from the USB Type-C
connector, and then you can simply walk through the drm_connectors and
match using the fwnode.
thanks,
Heikki Krogerus (12):
software node: Prevent potential NULL Pointer Dereference
software node: Increment parent node's ref count
software node: Add support for references
software node: Implement .get_reference_args fwnode operation
ACPI / property: Don't limit named child node matching to data nodes
device connection: Find connections also by checking the references
platform/x86: intel_cht_int33fe: Provide software node for all
components
platform/x86: intel_cht_int33fe: Provide fwnode for the USB connector
platform/x86: intel_cht_int33fe: Link with external dependencies using
fwnodes
platform/x86: intel_cht_int33fe: Replacing the old connections with
references
drm: Add fwnode member to the struct drm_connector
drm/i915: Associate the ACPI connector nodes with connector entries
drivers/acpi/property.c | 26 +-
drivers/base/devcon.c | 28 ++
drivers/base/swnode.c | 165 ++++++++++-
drivers/gpu/drm/drm_sysfs.c | 49 +++-
drivers/gpu/drm/i915/intel_display.c | 41 +++
drivers/platform/x86/intel_cht_int33fe.c | 349 ++++++++++++++++++++---
include/drm/drm_connector.h | 2 +
include/linux/property.h | 8 +
8 files changed, 599 insertions(+), 69 deletions(-)
--
2.20.1
