[Bug 70254] [snb dp hotplug] Pipe B, PCH transcoder B FIFO underrun

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=70254

--- Comment #36 from Robert N <crshman at gmail.com> ---
I'm not noticing a change in the register values when I change the latencies:

root at rnavarro-thinkpad:~# cat /sys/kernel/debug/dri/0/i915_pri_wm_latency
WM0 7 (0.7 usec)
WM1 3 (1.5 usec)
WM2 4 (2.0 usec)
WM3 22 (11.0 usec)

root at rnavarro-thinkpad:~# intel_reg_read 0x45100 0x45104
0x45100 : 0xD0006
0x45104 : 0xD0006

root at rnavarro-thinkpad:~# echo '14 6 8 44' >
/sys/kernel/debug/dri/0/i915_pri_wm_latency

root at rnavarro-thinkpad:~# cat /sys/kernel/debug/dri/0/i915_pri_wm_latency
WM0 14 (1.4 usec)
WM1 6 (3.0 usec)
WM2 8 (4.0 usec)
WM3 44 (22.0 usec)

root at rnavarro-thinkpad:~# intel_reg_read 0x45100 0x45104
0x45100 : 0xD0006
0x45104 : 0xD0006

Is that unexpected?

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