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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [BSW/SKL Debugfs] cat /sys/kernel/debug/dri/0/i915_sr_status showing self-refresh: disabled"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89792#c21">Comment # 21</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [BSW/SKL Debugfs] cat /sys/kernel/debug/dri/0/i915_sr_status showing self-refresh: disabled"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89792">bug 89792</a>
from <span class="vcard"><a class="email" href="mailto:imre.deak@intel.com" title="Imre Deak <imre.deak@intel.com>"> <span class="fn">Imre Deak</span></a>
</span></b>
<pre>(In reply to Elizabeth from <a href="show_bug.cgi?id=89792#c19">comment #19</a>)
<span class="quote">> Not sure of the validity of this tests, but if I do the "cat" I always get
> "disable".
>
> [gfx@BSW-1-BRASWELL] [~]$ : uname -r
> 4.16.0-rc7-drm-intel-qa-ww14-commit-f818c2b+
> [gfx@BSW-1-BRASWELL] [~]$ : sudo cat /sys/kernel/debug/dri/0/i915_sr_status
> self-refresh: disabled</span >
This should show enabled if you have any output enabled on pipe A or B. Can you
make sure this is the case before reading i915_sr_status?
<span class="quote">>
> [gfx@SKL-3-NUC6i7KYB] [~]$ : sudo cat /sys/kernel/debug/dri/0/i915_sr_status
> self-refresh: disabled
> [gfx@SKL-3-NUC6i7KYB] [~]$ : uname -r
> 4.16.0-rc7-drm-intel-qa-ww14-commit-f818c2b+</span >
This is expected, on GEN9+ there is no global memory self-refresh state, so
i915_sr_status will always return disabled on these platforms.</pre>
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