APPLIED [OEM-5.10] Re: [SRU] [Unstable/OEM-5.10] [PATCH 0/3] Drop i915 PSR workarounds
Timo Aaltonen
tjaalton at ubuntu.com
Mon Dec 14 18:32:58 UTC 2020
On 8.12.2020 19.13, Kai-Heng Feng wrote:
> 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(-)
>
applied to oem-5.10, thanks
--
t
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