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Hi, I’m pretty new to DRM/DRI and wonder if there is a way to have a stable identification of connectors across changes in the Linux kernel and/or in the devicetree? Our hardware contains an iMX8QM with two displays, each one connected to a MIPI-DSI channel. We use kernel 6.1.38. In the output of “modetest -c” the connectors are called LVDS-1 and LVDS-2. These names are built in modetest.c from connector_type and connector_type_id. connector_type_id is set in the kernel in drivers/gpu/drm/drm_connector.c in __drm_connector_init(): connector->connector_type_id = ida_alloc_min(connector_ida, 1, GFP_KERNEL); Seems to me that this number depends on initialization order only. Is there any other way to identify a connector? If not, will the type_id be stable as long as we don’t change the kernel version and the device tree? Best Regards, Joerg Albert
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