Hello again! I'm glad that I'm not the only person with a little confusion about the FW ECN regarding DPC/EDR. I would argue that DPC wasn't tied to EDR & shouldn't have been because DPC was added in PCI Base Spec Rev 3.1 in 2014, but there wasn't an EDR ECN till ~2020. Anyway, that's the way it goes.. I don't want to burden the kernel with making some impossible boot time decision here. Perhaps most of the machines in the world using DPC will soon use EDR/SFI etc. My use cases are a bit out of the ordinary & the ACPI specifications don't seem to have given us a mechanism for the kernel to conclude it can use DPC without EDR support... Shall I submit a patch removing CONFIG_PCIE_EDR? Perhaps the exercise would inform me about whether its code should be in CONFIG_PCIE_DPC or CONFIG_ACPI. Thanks, -Matt
