[SRU] [Unstable/OEM-5.10] [PATCH 0/3] Drop i915 PSR workarounds

[Kai-Heng Feng]

BugLink: https://bugs.launchpad.net/bugs/1907285

[Impact]
Disabling PSR helps some platforms but breaks others. So let's not play
this whack-a-mole game.

In addition to that, PSR can provide significant power saving, let Intel
SoC reach PC10 or even SLP_S0 withouth turning screen off.

[Fix]
Drop PSR workaround and stick to upstream code.

[Test]
Monitor numbers in /sys/kernel/debug/pmc_core/*

With PSR enabled, some Tiger Lake laptops can reach SLP_S0 without
turning screen off.

[Regression Potential]
Panels that don't work well with PSR may break again. If that ever
happens, we can introduce a blacklist on panels.

Kai-Heng Feng (3):
  Revert "UBUNTU: SAUCE: drm/dp: add DP_QUIRK_FORCE_PSR_CHIP_DEFAULT
    quirk to CMN prod-ID 19-15"
  Revert "UBUNTU: SAUCE: drm/i915/psr: allow overriding PSR disable
    param by quirk"
  Revert "UBUNTU: SAUCE: drm/i915: Disable PSR by default on all
    platforms"

 drivers/gpu/drm/drm_dp_helper.c          | 5 -----
 drivers/gpu/drm/i915/display/intel_psr.c | 8 --------
 drivers/gpu/drm/i915/i915_params.c       | 3 ++-
 drivers/gpu/drm/i915/i915_params.h       | 2 +-
 include/drm/drm_dp_helper.h              | 8 --------
 5 files changed, 3 insertions(+), 23 deletions(-)

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2.29.2