[SRU] [H/OEM-5.10] [PATCH 0/1] Fix ICL PCH no picture after S3

Kai-Heng Feng kai.heng.feng at canonical.com
Wed Jun 2 12:44:10 UTC 2021

BugLink: https://bugs.launchpad.net/bugs/1930582

Blank DP display after S3 on Intel GFX in ICL PCH desktop.

Use proper IRQ setup so the system in question can detect HPD after S3.

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.

Lyude Paul (1):
  drm/i915/icp+: Use icp_hpd_irq_setup() instead of spt_hpd_irq_setup()

 drivers/gpu/drm/i915/i915_irq.c | 2 ++
 1 file changed, 2 insertions(+)


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