On Fri, Feb 01, 2019 at 09:20:56PM +0000, Wentland, Harry wrote: > DRM's AUX code uses usleep_range in drm_dp_dpcd_access. My bad, forgot about the usleep_range switch. That said AUX_RETRY_INTERVAL is 500 us, with a usleep_range top bound of 600 us. Then, it would mean DC DP timeout retries would happen after ~1ms, and drm ~600us. Additionaly, it seems that the number of retries are 3 in drm code and 7 in DC code. I may be wrong, but it seems DC code is much more "insisting" on auxchannel (edid retrieval) and much more forgiving on monitor ability to timeout in time (~1ms). If I did read the code the right way, it may be more reasonable to have similar behavior in drm code than in DC code, right? -- Sylvain _______________________________________________ amd-gfx mailing list amd-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/amd-gfx
