[Bug 100047] [IGT] [SKL/GLK/APL/BSW/IVB/KBL/HSW /BYT] kms_sysfs_edid_timing test assertion failure

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Fri Aug 4 09:15:25 UTC 2017


https://bugs.freedesktop.org/show_bug.cgi?id=100047

--- Comment #18 from Marta Löfstedt <marta.lofstedt at intel.com> ---
(In reply to Clinton Taylor from comment #10)
> comment #8 should read 1ms between 8 byte reads as seen in the scope shot
> attached.
> 
> DDC operates at 100 Khz clock rate and AUX at 1 Mhz. eDP also only reads 128
> bytes total compared to HDMI/DP reads of 256 or 512 bytes. 
> 
> Are we sure 50ms is a valid test for DDC traffic?

Clinton, I tested OK with 100ms instead of 50ms on BDW/HDMI, since this was
based on your reasoning, could you send up an patch fixing the test.

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