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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