This bug was fixed in the package linux-oem-osp1 - 5.0.0-1033.38

---------------
linux-oem-osp1 (5.0.0-1033.38) bionic; urgency=medium

  * bionic/linux-oem-osp1: 5.0.0-1033.38 -proposed tracker (LP:
#1856522)

  * change kconfig of the soundwire bus driver from y to m (LP: #1855685)
    - [config]: SOUNDWIRE=m

  * alsa/sof: change to use hda hdmi codec driver to make hdmi audio on the
    docking station work (LP: #1855666)
    - ALSA: hda/hdmi - implement mst_no_extra_pcms flag
    - ASoC: hdac_hda: add support for HDMI/DP as a HDA codec
    - ASoC: Intel: skl-hda-dsp-generic: use snd-hda-codec-hdmi
    - ASoC: Intel: skl-hda-dsp-generic: fix include guard name
    - ASoC: SOF: Intel: add support for snd-hda-codec-hdmi
    - ASoC: SOF: enable sync_write in hdac_bus
    - [config]: SND_SOC_SOF_HDA_COMMON_HDMI_CODEC=y

  * Support DPCD aux brightness control (LP: #1856134)
    - SAUCE: drm/i915: Fix eDP DPCD aux max backlight calculations
    - SAUCE: drm/i915: Assume 100% brightness when not in DPCD control mode
    - SAUCE: drm/i915: Fix DPCD register order in 
intel_dp_aux_enable_backlight()
    - SAUCE: drm/i915: Check backlight type while doing eDP backlight
      initializaiton
    - SAUCE: drm/i915: Auto detect DPCD backlight support by default
    - SAUCE: drm/i915: Force DPCD backlight mode on X1 Extreme 2nd Gen 4K AMOLED
      panel
    - SAUCE: drm/i915: Force DPCD backlight mode on Dell Precision 4K sku

  * Make hotplugging docking station to Thunderbolt port more reliable
    (LP: #1853991)
    - PCI: PM: Avoid skipping bus-level PM on platforms without ACPI
    - PCI: Make pcie_downstream_port() available outside of access.c
    - PCI/PM: Add pcie_wait_for_link_delay()
    - PCI/PM: Add missing link delays required by the PCIe spec

  * X crashes if set to external monitor only and then remove HDMI cable during
    suspend (LP: #1856517)
    - SAUCE: drm/i915/icl: add missing GT workaround

  * Fix Realtek Bluetooth firmware download (LP: #1856079)
    - Bluetooth: btrtl: Fix an issue that failing to download the FW which size 
is
      over 32K bytes

  * Fix unusable USB hub on Dell TB16 after S3 (LP: #1855312)
    - SAUCE: USB: core: Make port power cycle a seperate helper function
    - SAUCE: USB: core: Attempt power cycle port when it's in eSS.Disabled state

  * alsa/hda/realtek: the line-out jack doens't work on a dell AIO
    (LP: #1855999)
    - SAUCE: ALSA: hda/realtek - Line-out jack doesn't work on a Dell AIO

 -- Timo Aaltonen <timo.aalto...@canonical.com>  Mon, 16 Dec 2019
14:56:37 +0200

-- 
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https://bugs.launchpad.net/bugs/1855666

Title:
  alsa/sof: change to use hda hdmi codec driver to make hdmi audio on
  the docking station work

Status in HWE Next:
  New
Status in linux package in Ubuntu:
  Fix Released
Status in linux-oem-osp1 package in Ubuntu:
  Fix Released
Status in linux source package in Bionic:
  Invalid
Status in linux-oem-osp1 source package in Bionic:
  Fix Released
Status in linux source package in Eoan:
  Fix Committed
Status in linux-oem-osp1 source package in Eoan:
  Fix Released

Bug description:
  [Impact]
  We have integrated the alsa sof driver in the oem-osp1 kernel, and
  when we tested the hdmi audio function on the docking station, we
  found if the machine use sof driver, the hdmi audio on the docking
  station can't work.

  [Fix]
  Intel wrote patches to let sof driver to choose hda hdmi codec
  driver, then both hdmi on the laptop and on the docking station
  worked.

  [Test Case]
  ran the kernel with these patches, and in the userspace, we used
  the intel updated ucm, then the hdmi audio on the docking station
  worked.

  [Regression Risk]
  Low, Intel wrote the patches and told us to backport these patches.
  In addition, we already tested these patches with 4 oem project bugs,
  all worked well.

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