kernel-packages team mailing list archive

[Timo Aaltonen <tjaalton@xxxxxxxxxx>]

drm/i915: respect the VBT minimum backlight brightness
drm/i915: extract backlight minimum brightness from VBT

these have not been proposed for utopic, since those did not fix
backlight issues for all, and in fact got at least partly reverted in
3.17.

** Also affects: linux (Ubuntu Utopic)
   Importance: Undecided
       Status: New

** Summary changed:

- [i915_bdw] Backported bugfixes
+ [i915 Broadwell] Backported bugfixes

** Changed in: linux (Ubuntu Utopic)
       Status: New => In Progress

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https://bugs.launchpad.net/bugs/1374389

Title:
  [i915 Broadwell] Backported bugfixes

Status in linux package in Ubuntu:
  Invalid
Status in linux source package in Trusty:
  Fix Released
Status in linux source package in Utopic:
  In Progress

Bug description:
  This set of backports fixes some issues in i915_bdw:

  drm/i915/bdw: Remove BDW preproduction W/As until C stepping.
  drm/i915: Add the WaCsStallBeforeStateCacheInvalidate:bdw workaround.
  drm/i915: Refactor Broadwell PIPE_CONTROL emission into a helper.
  drm/i915: Replace hardcoded cacheline size with macro
  drm/i915/bdw: Cleanup pre prod workarounds
  drm/i915/bdw: Apply workarounds in render ring init function
  drm/i915: call lpt_init_clock_gating on BDW too
  drm/i915/bdw: Disable idle DOP clock gating
  drm/i915/bdw: 3D_CHICKEN3 has write mask bits
  drm/i915: add null render states for gen6, gen7 and gen8
  - Add new workarounds and remove those that cause issues on production HW
  - Also makes sure the WA's are applied on GPU reset, suspend & resume et al
  - fixes various cases when the GPU can get hung

  drm/i915: respect the VBT minimum backlight brightness
  drm/i915: extract backlight minimum brightness from VBT
  drm/i915: shuffle panel code
  - fix a bug where changing the panel brightness to lowest value actually turns the panel off

  drm/i915/bdw: Add 42ms delay for IPS disable
  - fix the panel getting confused and corrupt when changing resolutions back and forth

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