Public bug reported:
[Impact]
Blank DP display after S3 on Intel GFX in ICL PCH desktop.
[Fix]
Use proper IRQ setup so the system in question can detect HPD after S3.
[Test]
Suspend and resume the system. No picture on DP display.
With the patch applied, DP display works as expected.
[Where problems could occur]
It changes how the Intel GFX setup its HPD IRQ, so hotplug detection
will be affected. This change is limited to ICL PCH.
This is the second patch of "drm/i915/gen9bc: Handle TGP PCH during
suspend/resume", but somehow it was omitted.
** Affects: hwe-next
Importance: Undecided
Status: New
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Fix Released
** Affects: linux-oem-5.10 (Ubuntu)
Importance: Undecided
Status: Invalid
** Affects: linux (Ubuntu Focal)
Importance: Undecided
Status: Won't Fix
** Affects: linux-oem-5.10 (Ubuntu Focal)
Importance: Medium
Status: Confirmed
** Affects: linux (Ubuntu Hirsute)
Importance: Medium
Status: Confirmed
** Affects: linux-oem-5.10 (Ubuntu Hirsute)
Importance: Undecided
Status: Invalid
** Tags: oem-priority originate-from-1930202 sutton
** Package changed: pulseaudio (Ubuntu) => linux (Ubuntu)
** Also affects: linux-oem-5.10 (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Hirsute)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.10 (Ubuntu Hirsute)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.10 (Ubuntu Focal)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Focal)
Status: New => Won't Fix
** Changed in: linux (Ubuntu)
Status: New => Fix Released
** Changed in: linux (Ubuntu Hirsute)
Status: New => Confirmed
** Changed in: linux (Ubuntu Hirsute)
Importance: Undecided => Medium
** Changed in: linux-oem-5.10 (Ubuntu)
Status: New => Invalid
** Changed in: linux-oem-5.10 (Ubuntu Hirsute)
Status: New => Invalid
** Changed in: linux-oem-5.10 (Ubuntu Focal)
Status: New => Confirmed
** Changed in: linux-oem-5.10 (Ubuntu Focal)
Importance: Undecided => Medium
** Tags added: oem-priority originate-from-1930202 sutton
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https://bugs.launchpad.net/bugs/1930582
Title:
Fix ICL PCH no picture after S3
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