[Bug 109247] [CI][SHARDS] igt at kms_frontbuffer_tracking@*psr* - fail - Failed assertion: psr_wait_entry(drm.debugfs)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=109247

--- Comment #15 from Jose Roberto de Souza <jose.souza at intel.com> ---
My guess here is because a FIFO underrun, eDP panel did not got the full PSR
RFB, so sink asserted the error and after that driver will not enable PSR
because when this kind of error happen it mark panel PSR implementation as not
reliable, this flag will be cleared on next reboot I will keep on eye on the
next full round. 

> <3>[  177.015115] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
> <7>[  177.015513] [drm:intel_fbc_underrun_work_fn [i915]] Disabling FBC due to FIFO underrun.
> <7>[  177.017724] [drm:gen8_de_irq_handler [i915]] hotplug event received, stat 0x00010000, dig 0x00000089, pins 0x00000010, long 0x00000000
> <7>[  177.017762] [drm:intel_hpd_irq_handler [i915]] digital hpd port A - short
> <7>[  177.017910] [drm:intel_dp_hpd_pulse [i915]] got hpd irq on port A - short
> <7>[  177.019633] [drm:intel_dp_read_dpcd [i915]] Base DPCD: 14 0a 82 41 00 00 01 c0 02 00 00 00 0f 09 80
> <7>[  177.019681] [drm:intel_dp_read_dpcd [i915]] DPCD: 14 0a 82 c1 00 00 01 c0 02 00 00 00 0f 09 80
> <7>[  177.020565] [drm:gen8_de_irq_handler [i915]] hotplug event received, stat 0x00010000, dig 0x00000089, pins 0x00000010, long 0x00000000
> <7>[  177.020616] [drm:intel_hpd_irq_handler [i915]] digital hpd port A - short
> <7>[  177.021281] [drm:intel_psr_short_pulse [i915]] PSR sink internal error, disabling PSR
> <7>[  177.021341] [drm:intel_psr_disable_locked [i915]] Disabling PSR2
> <7>[  177.022399] [drm:intel_psr_short_pulse [i915]] PSR RFB storage error, disabling PSR

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