[Bug 98374] async fbdev initial config leads to DP link train before first modeset: WARN_ON_ONCE(!intel_dp->lane_count)
bugzilla-daemon at freedesktop.org
bugzilla-daemon at freedesktop.org
Thu Nov 17 22:03:03 UTC 2016
https://bugs.freedesktop.org/show_bug.cgi?id=98374
--- Comment #6 from Chris Wilson <chris at chris-wilson.co.uk> ---
It's not just async fbdev. It's just complete garbage in
commit 7d23e3c37bb3fc6952dc84007ee60cb533fd2d5c
Author: Shubhangi Shrivastava <shubhangi.shrivastava at intel.com>
Date: Wed Mar 30 18:05:23 2016 +0530
drm/i915: Cleaning up intel_dp_hpd_pulse
Current DP detection has DPCD operations split across
intel_dp_hpd_pulse and intel_dp_detect which contains
duplicates as well. Also intel_dp_detect is called
during modes enumeration as well which will result
in multiple dpcd operations. So this patch tries
to solve both these by bringing all DPCD operations
in one single function and make intel_dp_detect
use existing values instead of repeating same steps.
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