kernel-packages team mailing list archive

[Timo Aaltonen <tjaalton@xxxxxxxxxx>]

Public bug reported:

4.3 will have a bunch of workarounds to fix silicon bugs and other
bugfixes that need to be backported to both vivid and wily. Some are for
gen8 chips which also allow cherry-picking the gen9 ones.

 drm/i915/skl: revert duplicated WaBarrierPerformanceFixDisable:skl
 drm/i915:skl: Add WaEnableGapsTsvCreditFix
 drm/i915/gen9: Add WaSetDisablePixMaskCammingAndRhwoInCommonSliceChicken
 drm/i915/gen9: Add WaFlushCoherentL3CacheLinesAtContextSwitch workaround
 drm/i915: Update wa_ctx_emit() macro as per kernel coding guidelines
 drm/i915/gen9: Add WaDisableCtxRestoreArbitration workaround
 drm/i915: Enable WA batch buffers for Gen9
 drm/i915: Update WaFlushCoherentL3CacheLinesAtContextSwitch
 drm/i915/gen8: Add WaClearSlmSpaceAtContextSwitch workaround
 drm/i915: Bail out early if WA batch is not available for given Gen
 drm/i915/gen8: Add WaFlushCoherentL3CacheLinesAtContextSwitch workaround
 drm/i915/gen8: Add WaDisableCtxRestoreArbitration workaround
 drm/i915/gen8: Re-order init pipe_control in lrc mode
 drm/i915/gen8: Add infrastructure to initialize WA batch buffers
 drm/i915: Fix divide by zero on watermark update

** Affects: linux (Ubuntu)
     Importance: High
         Status: Triaged

** Affects: linux (Ubuntu Vivid)
     Importance: High
     Assignee: Timo Aaltonen (tjaalton)
         Status: Triaged

** Affects: linux (Ubuntu Wily)
     Importance: High
         Status: Triaged

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

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

** Changed in: linux (Ubuntu Vivid)
       Status: New => Triaged

** Changed in: linux (Ubuntu Vivid)
     Assignee: (unassigned) => Timo Aaltonen (tjaalton)

** Changed in: linux (Ubuntu Vivid)
   Importance: Undecided => High

** Changed in: linux (Ubuntu Wily)
   Importance: Undecided => High

** Changed in: linux (Ubuntu Wily)
       Status: New => Triaged

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https://bugs.launchpad.net/bugs/1484486

Title:
  [i915 gen8/gen9] Add workarounds to fix hang bugs etc

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:
  4.3 will have a bunch of workarounds to fix silicon bugs and other
  bugfixes that need to be backported to both vivid and wily. Some are
  for gen8 chips which also allow cherry-picking the gen9 ones.

   drm/i915/skl: revert duplicated WaBarrierPerformanceFixDisable:skl
   drm/i915:skl: Add WaEnableGapsTsvCreditFix
   drm/i915/gen9: Add WaSetDisablePixMaskCammingAndRhwoInCommonSliceChicken
   drm/i915/gen9: Add WaFlushCoherentL3CacheLinesAtContextSwitch workaround
   drm/i915: Update wa_ctx_emit() macro as per kernel coding guidelines
   drm/i915/gen9: Add WaDisableCtxRestoreArbitration workaround
   drm/i915: Enable WA batch buffers for Gen9
   drm/i915: Update WaFlushCoherentL3CacheLinesAtContextSwitch
   drm/i915/gen8: Add WaClearSlmSpaceAtContextSwitch workaround
   drm/i915: Bail out early if WA batch is not available for given Gen
   drm/i915/gen8: Add WaFlushCoherentL3CacheLinesAtContextSwitch workaround
   drm/i915/gen8: Add WaDisableCtxRestoreArbitration workaround
   drm/i915/gen8: Re-order init pipe_control in lrc mode
   drm/i915/gen8: Add infrastructure to initialize WA batch buffers
   drm/i915: Fix divide by zero on watermark update

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