[Bug 96226] [IGT] some kms_flip subtests causes [i915]] *ERROR* CPU pipe B/C FIFO underrun

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96226

--- Comment #44 from Octavio <octaviox.hernandez.lopez at intel.com> ---
The below test has dmesg-warn on CFL QA

igt at kms_cursor_legacy@cursorB-vs-flipB-toggle

IGT-Version: 1.22-ga9741da (x86_64) (Linux:
4.16.0-rc7-drm-intel-qa-ww13-commit-8eb8f6d+ x86_64)
Test requirement not met in function __real_main1358, file
kms_cursor_legacy.c:1378:
Test requirement: !(n >= display.n_pipes)
Using pipe B for page flip, pipe B for cursor
Subtest cursorB-vs-flipB-toggle: SUCCESS (11.959s)

[   83.165901] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU
pipe B FIFO underrun

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