[Bug 91845] [HSW]i915 does 2s long DP-link-reset (backlight off) during modeset instead of re-using SimpleFB, stacktrace with i915.fastboot=1

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91845

--- Comment #17 from Ville Syrjala <ville.syrjala at linux.intel.com> ---
The modeset is slow due to long panel power delays declared in the VBT.

[    0.568400] [drm:intel_pps_dump_state] cur t1_t3 0 t8 0 t9 0 t10 500 t11_t12
6000
[    0.568402] [drm:intel_pps_dump_state] vbt t1_t3 3000 t8 1000 t9 12000 t10
500 t11_t12 6000
[    0.568404] [drm:intel_dp_init_panel_power_sequencer] panel power up delay
300, power down delay 50, power cycle delay 600
[    0.568406] [drm:intel_dp_init_panel_power_sequencer] backlight on delay
100, off delay 1200

The backlight off delay in particular is 1.2 seconds. Not much we can do about
that.

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are on the CC list for the bug.
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20181019/0131114c/attachment.html>