[Bug 108503] Display flashes when PSR enabled on gen9

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=108503

--- Comment #25 from Ronald <ronald at innovation.ch> ---
  Hi Jose,

(In reply to Jose Roberto de Souza from comment #23)
> So I updated https://github.com/zehortigoza/linux/commits/psr-debug-108503
> 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(https://bugs.freedesktop.org/attachment.cgi?id=142415) while screen
> is blank?
> Just make sure your kernel config have CONFIG_DRM_DP_AUX_CHARDEV=y
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

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