[Bug 1922768] Re: Update - Fix no screen show on display after S3 on CML-R

** Changed in: linux (Ubuntu Focal)
Status: New => Invalid

** Changed in: hwe-next
Status: New => Fix Released

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https://bugs.launchpad.net/bugs/1922768

Title:
Update - Fix no screen show on display after S3 on CML-R

Status in HWE Next:
Fix Released
Status in linux package in Ubuntu:
Fix Released
Status in linux-oem-5.10 package in Ubuntu:
Invalid
Status in linux source package in Focal:
Invalid
Status in linux-oem-5.10 source package in Focal:
Fix Released
Status in linux source package in Hirsute:
Fix Released
Status in linux-oem-5.10 source package in Hirsute:
Invalid

Bug description:
[Impact]
On CML-R, after S3, No screen show on all three connector(3*DP).

[Fix]
Here's v4 patch and has been landed on drm-tip,
https://patchwork.freedesktop.org/patch/msgid/20210217180016.1937401-1-lyude@redhat.com,
so revert the old and resend the v4 patch.
For Legacy S3 suspend/resume GEN9 BC needs to enable and setup TGP PCH.

[Test Case]
1. Connected the monitor on one of 3*DP on CML-R.
2. Suspend&resume the machine.
3. Check the monitor can output something.

[Where problems could occur]
Just Enable the hpd detection in IRQ installer and during suspend&resume.

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