Public bug reported:

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

[Fix]
The v4 patch has been landed on drm-tip.
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.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

** Summary changed:

- Fix no screen show on display after S3 on CML-R 
+ Update patch - Fix no screen show on display after S3 on CML-R

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https://bugs.launchpad.net/bugs/1921974

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

Status in linux package in Ubuntu:
  New

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

  [Fix]
  The v4 patch has been landed on drm-tip.
  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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