[Bug 101679] [KBL][regression] display corruption since bb0f4aab0e7677e9

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101679

--- Comment #5 from Shih-Yuan Lee <fourdollars at gmail.com> ---
I compared the good and bad cases by the mainline kernel v4.13.
The bad case has some additional hotplug events.
I don't know if it is related.

[drm:intel_get_hpd_pins [i915]] hotplug event received, stat 0x01000000, dig
0x11101010, pins 0x00000010
[drm:intel_hpd_irq_handler [i915]] digital hpd port A - short
[drm:intel_dp_hpd_pulse [i915]] got hpd irq on port A - short
[drm:intel_dp_read_dpcd [i915]] DPCD: 14 00 c4 c1 00 00 01 c0 02 00 00 00 00 0b
00
[drm:i915_hotplug_work_func [i915]] running encoder hotplug functions
[drm:i915_hotplug_work_func [i915]] Connector eDP-1 (pin 4) received hotplug
event.
[drm:intel_dp_detect [i915]] [CONNECTOR:48:eDP-1]
[drm:intel_dp_detect [i915]] Display Port TPS3 support: source yes, sink yes
[drm:intel_dp_print_rates [i915]] source rates: 162000, 216000, 270000, 324000,
432000, 540000
[drm:intel_dp_print_rates [i915]] sink rates: 162000, 216000, 243000, 270000,
324000, 432000, 540000
[drm:intel_dp_print_rates [i915]] common rates: 162000, 216000, 270000, 324000,
432000, 540000
[drm:drm_dp_read_desc [drm_kms_helper]] DP sink: OUI 38-ec-11 dev-ID  HW-rev
0.0 SW-rev 0.0 quirks 0x0000
[drm:intel_get_hpd_pins [i915]] hotplug event received, stat 0x01000000, dig
0x11101010, pins 0x00000010
[drm:intel_hpd_irq_handler [i915]] digital hpd port A - short
[drm:intel_dp_hpd_pulse [i915]] got hpd irq on port A - short
[drm:intel_dp_read_dpcd [i915]] DPCD: 14 00 c4 c1 00 00 01 c0 02 00 00 00 00 0b
00

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