Public bug reported:
Display power well can cause issues like blank screen when logging in
after resume from suspend, so it's best to disable it for now like
upstream did in v4.4-rc1:
commit 1b0e3a049efe471c399674fd954500ce97438d30
Author: Imre Deak <imre.d...@intel.com>
Date: Thu Nov 5 23:04:11 2015 +0200
drm/i915/skl: disable display side power well support for now
The display power well support on this platform is in a somewhat broken
state atm, so disable it by default.
This in effect will get rid of incorrect assert WARNs about the CSR/DMC
firmware not being loaded during power well toggling. It also removes a
problem during driver loading where a register is accessed while its
backing power well is down, resulting in another WARN. Until we come up
with the root cause of the second problem and the proper fix for both
issues, keep all display side power wells on.
Also clarify a bit the option description.
Reported-by: Dave Airlie <airl...@redhat.com>
Reference:
http://mid.gmane.org/CAPM=9tyjbqjsbtka49crr6sykpnw7pq-fufznzz8y1snvvk...@mail.gmail.com
Signed-off-by: Imre Deak <imre.d...@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
Link:
http://patchwork.freedesktop.org/patch/msgid/1446757451-2777-1-git-send-email-imre.d...@intel.com
Signed-off-by: Jani Nikula <jani.nik...@intel.com>
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: Timo Aaltonen (tjaalton)
Status: Triaged
** Affects: linux (Ubuntu Vivid)
Importance: Undecided
Status: Triaged
** Affects: linux (Ubuntu Wily)
Importance: Undecided
Status: Triaged
** Also affects: linux (Ubuntu Wily)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Vivid)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu)
Status: New => Triaged
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Timo Aaltonen (tjaalton)
** Changed in: linux (Ubuntu Vivid)
Status: New => Triaged
** Changed in: linux (Ubuntu Wily)
Status: New => Triaged
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https://bugs.launchpad.net/bugs/1526220
Title:
[SKL] Disable display power well
Status in linux package in Ubuntu:
Triaged
Status in linux source package in Vivid:
Triaged
Status in linux source package in Wily:
Triaged
Bug description:
Display power well can cause issues like blank screen when logging in
after resume from suspend, so it's best to disable it for now like
upstream did in v4.4-rc1:
commit 1b0e3a049efe471c399674fd954500ce97438d30
Author: Imre Deak <imre.d...@intel.com>
Date: Thu Nov 5 23:04:11 2015 +0200
drm/i915/skl: disable display side power well support for now
The display power well support on this platform is in a somewhat broken
state atm, so disable it by default.
This in effect will get rid of incorrect assert WARNs about the CSR/DMC
firmware not being loaded during power well toggling. It also removes a
problem during driver loading where a register is accessed while its
backing power well is down, resulting in another WARN. Until we come up
with the root cause of the second problem and the proper fix for both
issues, keep all display side power wells on.
Also clarify a bit the option description.
Reported-by: Dave Airlie <airl...@redhat.com>
Reference:
http://mid.gmane.org/CAPM=9tyjbqjsbtka49crr6sykpnw7pq-fufznzz8y1snvvk...@mail.gmail.com
Signed-off-by: Imre Deak <imre.d...@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
Link:
http://patchwork.freedesktop.org/patch/msgid/1446757451-2777-1-git-send-email-imre.d...@intel.com
Signed-off-by: Jani Nikula <jani.nik...@intel.com>
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