Need support for Pericom PCIe Serial Card [12d8:7952]

[Adam Lee]

Pericom PCIe Serial Card [12d8:7952] doesn't work.

Still in progress of upstreaming the fix to mainline.

SRU Justification:

Impact: https://launchpad.net/bugs/1475481
Fix: from vendor, upstreamed by Adam, accepted by Greg's tty-next by now.
Testcase: already tested on a dell laptop, it works.

[Adam Lee (adam8157)]

in tty-next now, https://git.kernel.org/cgit/linux/kernel/git/gregkh/tty.git/commit/?h=tty-next&id=89c043a6cb2d4525d48a38ed78d5f0f5672338b3

[Adam Lee (adam8157)]

can not wait next merging window(in about three weeks), will submit a "UBUNTU: SAUCE: " patch.

[Luis Henriques (henrix)]

This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-vivid' to 'verification-done-vivid'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!

[Woodrow Shen (woodrow-shen)]

SKU: FAR-MT-DTV1-C1
CID: 201504-18255

The -proposed kernel (3.19.0-27.29) verified the Pericom serial device.

Console log:
==========================================
Welcome to minicom 2.7

OPTIONS: I18n
Compiled on Jan 1 2014, 17:13:19.
Port /dev/ttyUSB0, 11:46:01

Press CTRL-A Z for help on special keys

Ubuntu 14.04.2 LTS u-Precision-Tower-3620 ttyS5

u-Precision-Tower-3620 login:
Ubuntu 14.04.2 LTS u-Precision-Tower-3620 ttyS5

u-Precision-Tower-3620 login: u
Password:
Last login: Tue Aug 18 23:44:28 EDT 2015 on ttyS5
Welcome to Ubuntu 14.04.2 LTS (GNU/Linux 3.19.0-27-generic x86_64)

 * Documentation: https://help.ubuntu.com/

u@u-Precision-Tower-3620:~$
==========================================

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 4.2.0-7.7

---------------
linux (4.2.0-7.7) wily; urgency=low

  [ Tim Gardner ]

  * Release Tracking Bug
    - LP: #1490564
  * rebase to v4.2

  [ Wen Xiong ]

  * SAUCE: ipr: Byte swapping for device_id attribute in sysfs
    - LP: #1453892

  [ Upstream Kernel Changes ]

  * rebase to v4.2
    - LP: #1487345

 -- Tim Gardner <email address hidden> Wed, 26 Aug 2015 07:06:10 -0600

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 3.19.0-28.30

---------------
linux (3.19.0-28.30) vivid; urgency=low

  [ Luis Henriques ]

  * Release Tracking Bug
    - LP: #1490606

  [ Gary Wang ]

  * SAUCE: i915_bpo: drm/i915: set CDCLK if DPLL0 enabled during resuming
    from S3
    - LP: #1490035

  [ Timo Aaltonen ]

  * Revert "SAUCE: i915_bpo: drm/i915/skl: DDI-E and DDI-A shares 4 lanes."
    - LP: #1490038

linux (3.19.0-27.29) vivid; urgency=low

  [ Brad Figg ]

  * Release Tracking Bug
    - LP: #1485113

  [ Adam Lee ]

  * SAUCE: serial: 8250_pci: Add support for Pericom PI7C9X795[1248]
    - LP: #1480142

  [ Arun Siluvery ]

  * SAUCE: i915_bpo: drm/i915/gen8: Add infrastructure to initialize WA
    batch buffers
    - LP: #1484486
  * SAUCE: i915_bpo: drm/i915/gen8: Re-order init pipe_control in lrc mode
    - LP: #1484486
  * SAUCE: i915_bpo: drm/i915/gen8: Add WaDisableCtxRestoreArbitration
    workaround
    - LP: #1484486
  * SAUCE: i915_bpo: drm/i915/gen8: Add
    WaFlushCoherentL3CacheLinesAtContextSwitch workaround
    - LP: #1484486
  * SAUCE: i915_bpo: drm/i915: Bail out early if WA batch is not available
    for given Gen
    - LP: #1484486
  * SAUCE: i915_bpo: drm/i915/gen8: Add WaClearSlmSpaceAtContextSwitch
    workaround
    - LP: #1484486
  * SAUCE: i915_bpo: drm/i915: Update
    WaFlushCoherentL3CacheLinesAtContextSwitch
    - LP: #1484486
  * SAUCE: i915_bpo: drm/i915: Enable WA batch buffers for Gen9
    - LP: #1484486
  * SAUCE: i915_bpo: drm/i915/gen9: Add WaDisableCtxRestoreArbitration
    workaround
    - LP: #1484486
  * SAUCE: i915_bpo: drm/i915: Update wa_ctx_emit() macro as per kernel
    coding guidelines
    - LP: #1484486
  * SAUCE: i915_bpo: drm/i915/gen9: Add
    WaFlushCoherentL3CacheLinesAtContextSwitch workaround
    - LP: #1484486
  * SAUCE: i915_bpo: drm/i915/gen9: Add
    WaSetDisablePixMaskCammingAndRhwoInCommonSliceChicken
    - LP: #1484486
  * SAUCE: i915_bpo: drm/i915:skl: Add WaEnableGapsTsvCreditFix
    - LP: #1484486

  [ Chris Wilson ]

  * SAUCE: i915_bpo: drm/i915: Use two 32bit reads for select 64bit
    REG_READ ioctls
    - LP: #1484482
  * SAUCE: i915_bpo: drm/i915: Replace WARN inside I915_READ64_2x32 with
    retry loop
    - LP: #1484482
  * SAUCE: i915_bpo: drm/i915: Mark PIN_USER binding as GLOBAL_BIND without
    the aliasing ppgtt
    - LP: #1484482
  * SAUCE: i915_bpo: drm/i915: Declare the swizzling unknown for L-shaped
    configurations
    - LP: #1484482

  [ Damien Lespiau ]

  * SAUCE: i915_bpo: drm/i915/skl: Don't expose the top most plane on gen9
    display
    - LP: #1484486

  [ Daniel Vetter ]

  * SAUCE: i915_bpo: drm/i915: Fixup dp mst encoder selection
    - LP: #1484482

  [ David Weinehall ]

  * SAUCE: i915_bpo: drm/i915: Allow parsing of variable size child device
    entries from VBT
  * SAUCE: i915_bpo: drm/i915: Allow parsing of variable size child device
    entries from VBT, addendum v2
    - LP: #1484482

  [ Jani Nikula ]

  * SAUCE: i915_bpo: drm/i915/skl: WaIgnoreDDIAStrap is forever, always
    init DDI A
    - LP: #1484486
  * SAUCE: i915_bpo: drm/i915: reduce indent in i9xx_hpd_irq_handler
    - LP: #1484531
  * SAUCE: i915_bpo: drm/i91...