On Tue, Apr 29, 2025 at 10:50:55AM +0300, Abel Vesa wrote: > On 25-04-29 09:23:46, Johan Hovold wrote: > > On Mon, Apr 28, 2025 at 05:17:21PM +0300, Abel Vesa wrote: > > > On 25-04-28 14:47:04, Johan Hovold wrote: > > > > On Mon, Apr 28, 2025 at 11:06:39AM +0200, Aleksandrs Vinarskis wrote: > > > > > On Mon, 28 Apr 2025 at 09:45, Johan Hovold <[email protected]> wrote:
> > > > > > Does this mean that the incomplete LTTPR support in 6.15-rc1 broke > > > > > > adapters or docks with retimers in transparent mode? > > Ok, but my concern is if they may have worked in a default transparent > > mode. > > But if they are by default in transparent mode, doing the setup to > transparent mode will not break it in any way. It looks like it will, see below. > > > X13s doesn't have LTTPRs on-board so when reading the caps, LTTPRs count > > > would return 0 and none of the of the transparent/non-transparent setup > > > would happen. > > > > But this is the crux; does any off-board LTTPRs in transparent mode add > > to the count or not? If they don't, how would you ever learn that there > > are any LTTPRs? If they do, it seems we may have a problem here. > > Count gets increased either way. It doesn't matter if they are in > transparent mode or not. Thanks for confirming. So then it seems we do have a problem as since 6.15-rc1 drm_dp_lttpr_init() will switch all LTTPRs to non-transparent mode. Johan
