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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [CI][DRMTIP] igt@*crc tests* - warn / dmesg-warn - Suspicious CRC: it looks like the CRC read back was from a register in a powered down well"
href="https://bugs.freedesktop.org/show_bug.cgi?id=108336#c4">Comment # 4</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [CI][DRMTIP] igt@*crc tests* - warn / dmesg-warn - Suspicious CRC: it looks like the CRC read back was from a register in a powered down well"
href="https://bugs.freedesktop.org/show_bug.cgi?id=108336">bug 108336</a>
from <span class="vcard"><a class="email" href="mailto:jani.saarinen@intel.com" title="Jani Saarinen <jani.saarinen@intel.com>"> <span class="fn">Jani Saarinen</span></a>
</span></b>
<pre>From Ville (fdo <a class="bz_bug_link
bz_status_NEW "
title="NEW - [CI] igt@* - warn - Suspicious CRC: it looks like the CRC read back was from a register in a powered down well"
href="show_bug.cgi?id=106974">bug 106974</a>)
<span class="quote">> I was just looking at crcs on icl and spotted the following:
> 0x00098785 0xd2d6ad2b 0x00000000 0x00000000 0x00000000 0x00000000
> 0x00098786 0xd2d6ad2b 0x00000000 0x00000000 0x00000000 0x00000000
> 0x0009879b 0xffffffff 0x00000000 0x00000000 0x00000000 0x00000000
> 0x0009879c 0xd2d6ad2b 0x00000000 0x00000000 0x00000000 0x00000000
> 0x0009879d 0x82618fd1 0x00000000 0x00000000 0x00000000 0x00000000
>
> So the frame counter jumps by quite a lot there and we get a bogus crc at
> the same time. As I immediately suspected the culprit is PSR. We should
> probably disable PSR while CRC capturing is enabled.</span ></pre>
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