** Description changed:

  [Impact]
  On CML-R, after S3, No screen show on all three connector(3*DP).
  
  [Fix]
+ here's v4 patch come from 
https://patchwork.freedesktop.org/patch/msgid/[email protected],
 
+ 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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https://bugs.launchpad.net/bugs/1922768

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

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