On Thu, Nov 15, 2018 at 05:46:08PM +0000, Lorenzo Pieralisi wrote: > Do you really need to parse it if the dev->is_thunderbolt check is enough ? Yes, we need to parse it one way or another. dev->is_thunderbolt is based on heuristics which do not apply anymore when the thing gets integrated in the SoC. The _DSD is there already (on existing systems) and is being used by Windows so I don't understand why we cannot take advantage of it? Every new system with Thunderbolt ports will have it.