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<b><a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - Display flashes when PSR enabled on gen9"
href="https://bugs.freedesktop.org/show_bug.cgi?id=108503#c25">Comment # 25</a>
on <a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - Display flashes when PSR enabled on gen9"
href="https://bugs.freedesktop.org/show_bug.cgi?id=108503">bug 108503</a>
from <span class="vcard"><a class="email" href="mailto:ronald@innovation.ch" title="Ronald <ronald@innovation.ch>"> <span class="fn">Ronald</span></a>
</span></b>
<pre> Hi Jose,
(In reply to Jose Roberto de Souza from <a href="show_bug.cgi?id=108503#c23">comment #23</a>)
<span class="quote">> So I updated <a href="https://github.com/zehortigoza/linux/commits/psr-debug-108503">https://github.com/zehortigoza/linux/commits/psr-debug-108503</a>
> with a change to disable CRC check in sink as Dhinakaran suggested.
> Could you run it again with amdgpu disabled and also could you ssh into your
> machine and run this
> script(<a href="https://bugs.freedesktop.org/attachment.cgi?id=142415">https://bugs.freedesktop.org/attachment.cgi?id=142415</a>) while screen
> is blank?
> Just make sure your kernel config have CONFIG_DRM_DP_AUX_CHARDEV=y</span >
Done. Here is the output from the script while the screen is visible:
0x170=01
0x2006=00
0x2007=00
0x2008=00
0x2009=08
0x200A=00
And this is the output when the screen is blank:
0x170=01
0x2006=00
0x2007=00
0x2008=00
0x2009=08
0x200A=01
Lastly, not sure if all this info is in the log (didn't see it, but could've
missed it) or if it's useful to you, but there is the full output from
/sys/kernel/debug/dri/0/eDP-1/i915_dpcd:
0000: 11 0a 84 41 00 00 01 80 02 00 00 00 0f 0b 00
0070: 01 01
0080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0100: 0a 84 00 00 00 00 00 00 01 08 00
0200: 01 00 77 77 01 01 00 00
0600: 01
0700: 02
0701: 83 97 00 00
0720: 81 04 00 00 10 0f 0f 00 00 00 00 00 00 00 00 00
0732: 00 00</pre>
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