drm/i915: revert the patch of "set disable_power_well=0 for icl temporarily"

Bug #1839950 reported by Hui Wang on 2019-08-13
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
linux-oem-osp1 (Ubuntu)
Critical
Hui Wang
Bionic
Undecided
Unassigned

Bug Description

This is for resend:

[Impact]
We sent the patch to set disable_power_well=0, this is
because we found sometimes the hdmi audio driver printed out the timeout
errors when accessing the codec. But after the fix of #1847192 is
merged, this issue will not happen anymore, so this patch is useless now,
and it add power consumption to graphic drivers, let us revert this patch.

[Fix]
Revert the patch.

[Test Case]
Tested on the new icl laptops, we have not reproduce the timeout errors,
and The PC can enter PC10.

[Regression Risk]
Low. We have done many tests.

==========================================
[Impact]
Two weeks ago, we sent the patch to set disable_power_well=0, this is
because we found sometimes the hdmi audio driver printed out the timeout
errors when accessing the codec. But recently the ODM told us those
machines had some HW or BIOS issues, we can't reproduce the timeout
errors on the new machines anymore even without this patch. And moreover
we need put the CPU into PC10 power state to meet the E-star starndard,
we need to revert this patch.

[Fix]
Revert the patch.

[Test Case]
Tested on the new icl laptops, we have not reproduce the timeout errors,
and The PC can enter PC10.

[Regression Risk]
Low. We have done many tests.

Hui Wang (hui.wang) on 2019-08-13
Changed in linux-oem-osp1 (Ubuntu):
importance: Undecided → Critical
Hui Wang (hui.wang) on 2019-08-13
description: updated
Timo Aaltonen (tjaalton) wrote :

last word is this can't be done yet

Changed in linux-oem-osp1 (Ubuntu):
status: New → Incomplete
Hui Wang (hui.wang) on 2019-10-10
description: updated
Timo Aaltonen (tjaalton) on 2019-10-22
Changed in linux-oem-osp1 (Ubuntu Bionic):
status: New → Fix Committed
Launchpad Janitor (janitor) wrote :
Download full text (40.0 KiB)

This bug was fixed in the package linux-oem-osp1 - 5.0.0-1027.31

---------------
linux-oem-osp1 (5.0.0-1027.31) bionic; urgency=medium

  * CVE-2019-11135
    - [Config] Disable TSX by default when possible

  * Packaging resync (LP: #1786013)
    - [Packaging] update helper scripts

  [ Ubuntu: 5.0.0-35.38 ]

  * [REGRESSION] md/raid0: cannot assemble multi-zone RAID0 with default_layout
    setting (LP: #1849682)
    - SAUCE: Fix revert "md/raid0: avoid RAID0 data corruption due to layout
      confusion."
  * refcount underflow and type confusion in shiftfs (LP: #1850867) // CVE-2019-15793
    - SAUCE: shiftfs: Correct id translation for lower fs operations
    - SAUCE: shiftfs: prevent type confusion
    - SAUCE: shiftfs: Fix refcount underflow in btrfs ioctl handling
  * CVE-2018-12207
    - kvm: Convert kvm_lock to a mutex
    - kvm: x86: Do not release the page inside mmu_set_spte()
    - KVM: x86: make FNAME(fetch) and __direct_map more similar
    - KVM: x86: remove now unneeded hugepage gfn adjustment
    - KVM: x86: change kvm_mmu_page_get_gfn BUG_ON to WARN_ON
    - KVM: x86: add tracepoints around __direct_map and FNAME(fetch)
    - kvm: x86, powerpc: do not allow clearing largepages debugfs entry
    - SAUCE: KVM: vmx, svm: always run with EFER.NXE=1 when shadow paging is
      active
    - SAUCE: x86: Add ITLB_MULTIHIT bug infrastructure
    - SAUCE: kvm: mmu: ITLB_MULTIHIT mitigation
    - SAUCE: kvm: Add helper function for creating VM worker threads
    - SAUCE: kvm: x86: mmu: Recovery of shattered NX large pages
    - SAUCE: cpu/speculation: Uninline and export CPU mitigations helpers
    - SAUCE: kvm: x86: mmu: Apply global mitigations knob to ITLB_MULTIHIT
  * CVE-2019-11135
    - KVM: x86: use Intel speculation bugs and features as derived in generic x86
      code
    - x86/msr: Add the IA32_TSX_CTRL MSR
    - x86/cpu: Add a helper function x86_read_arch_cap_msr()
    - x86/cpu: Add a "tsx=" cmdline option with TSX disabled by default
    - x86/speculation/taa: Add mitigation for TSX Async Abort
    - x86/speculation/taa: Add sysfs reporting for TSX Async Abort
    - kvm/x86: Export MDS_NO=0 to guests when TSX is enabled
    - x86/tsx: Add "auto" option to the tsx= cmdline parameter
    - x86/speculation/taa: Add documentation for TSX Async Abort
    - x86/tsx: Add config options to set tsx=on|off|auto
    - SAUCE: x86/speculation/taa: Call tsx_init()
    - [Config] Disable TSX by default when possible
  * CVE-2019-0154
    - SAUCE: drm/i915: Lower RM timeout to avoid DSI hard hangs
    - SAUCE: drm/i915/gen8+: Add RC6 CTX corruption WA
  * CVE-2019-0155
    - SAUCE: drm/i915: Rename gen7 cmdparser tables
    - SAUCE: drm/i915: Disable Secure Batches for gen6+
    - SAUCE: drm/i915: Remove Master tables from cmdparser
    - SAUCE: drm/i915: Add support for mandatory cmdparsing
    - SAUCE: drm/i915: Support ro ppgtt mapped cmdparser shadow buffers
    - SAUCE: drm/i915: Allow parsing of unsized batches
    - SAUCE: drm/i915: Add gen9 BCS cmdparsing
    - SAUCE: drm/i915/cmdparser: Use explicit goto for error paths
    - SAUCE: drm/i915/cmdparser: Add support for backward jumps
    - SAUCE: drm/i915/cmdparser: Ignore L...

Changed in linux-oem-osp1 (Ubuntu Bionic):
status: Fix Committed → Fix Released
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