On Tue, 23 Feb 2021 17:25:23 +0100, Jaroslav Kysela wrote: > > Dne 23. 02. 21 v 15:14 Kai Vehmanen napsal(a): > > > This is somewhat arbitrary still. If we simply want to enable the mode for > > TGL only, easier and cleaned would be to set this flag in > > patch_i915_tgl_hdmi() directly. > > A dumb question: Does TGL really support up to 11 separate displays or it's > just to handle 11 connections and the number of maximal simultanenous > connected displays is lower? In the later case, the dynamic allocation makes > sense a lot. That's the latter. And, the fixed assignment was merely for compatibility with legacy usage, and supposed to be 3 fixed ones or so. Extending to that high number wasn't intended when the mechanism was introduced. We should have noticed it at ICL support (which has up to 6 devices). About the number of devices: from the implementation POV, number 4 makes sense. In the current implementation, with more than 4 HDMI devices, the PCM device number itself is assigned dynamically, hence you can't enumerate fully statically, in anyway. Takashi
