[PATCH 0/1][SRU][F/G/U/5.10-OEM] UBUNTU: SAUCE: Fix no screen show on display after S3 on CML-R

[Koba Ko]

BugLink: https://bugs.launchpad.net/bugs/1913682                                 

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

[Fix]
The patch is got from https://patchwork.freedesktop.org/patch/416162/.
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.

Tejas Upadhyay (1):
  UBUNTU: SAUCE: drm/i915/gen9bc: Handle TGP PCH during suspend/resume

 drivers/gpu/drm/i915/i915_irq.c | 48 ++++++++++++++++++++++-----------
 1 file changed, 33 insertions(+), 15 deletions(-)

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2.25.1