Backported commit breaks audio (fixed upstream)

[Jaime Pérez]

== Justification ==
Commit 648e921888ad96ea3dc922739e96716ad3225d7f (clk: x86: Stop marking clocks as CLK_IS_CRITICAL) backported to Cosmic kernel fixed the bug that keeps unused clocks on, but it is breaking the audio support on some Chromebooks (Swanky / Clapper/ Gnawty) since we were not using
the right clock in the cht_bsw_max98090_ti machine driver.

== Fix ==
a182ecd (ASoC: intel: cht_bsw_max98090_ti: Add quirk for boards
 using pmc_plt_clk_0)
984bfb3 (ASoC: intel: cht_bsw_max98090_ti: Add pmc_plt_clk_0 quirk)
94ea56c (ASoC: intel: cht_bsw_max98090_ti: Add pmc_plt_clk_0 quirk)

These 3 patches can be cherry-picked to Cosmic.

== Test ==
Test kernel with these 3 patches could be found in:
http://people.canonical.com/~phlin/kernel/lp-1811566-chromebook-Gnawty/

Bug reporter stated that this kernel can fix the audio issue as expected.

== Regression potential ==
Low,
changes are limited in the cht_bsw_max98090_ti driver with a new DMI based quirk table that contains these 3 Chromebook models and some logic to determine the right clock to use.

It seems that commit 648e921888ad96ea3dc922739e96716ad3225d7f was backported to ubuntu's 4.18 kernel. That commit breaks audio for some devices (chromebook gnawty) (from 4.19 on). Now 4.19, 4.20, 5.0 are fixed, with patch on commit:

47148001ae12292984ba1b38d9babefb9a46cd3e
ASoC: intel: cht_bsw_max98090_ti: Add pmc_plt_clk_0 quirk for Chromebook Gnawty

Bug reported:

https://bugzilla.kernel.org/show_bug.cgi?id=201787

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1811566

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Jaime Pérez (jaime-91)]

No need of logs, as is reported and fixed upstream

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1811566

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Po-Hsu Lin (cypressyew)]

This patch:
    ASoC: intel: cht_bsw_max98090_ti: Add pmc_plt_clk_0 quirk for Chromebook
is actually with SHA1:
    94ea56cff506c769a509c5dd87904c7fe3806a81

And this patch could be found in the Disco kernel, applied 3 days ago:
    https://kernel.ubuntu.com/git/ubuntu/ubuntu-disco.git/commit/?h=master-next&id=a0c45e39dad82e08fbcafb96201c6714b792e60b

For this patch to land on Cosmic 4.18, it will need:
    1. a182ecd (ASoC: intel: cht_bsw_max98090_ti: Add quirk for boards using pmc_plt_clk_0)
    2. 984bfb3 (ASoC: intel: cht_bsw_max98090_ti: Add pmc_plt_clk_0 quirk for Chromebook Clapper)
    3. 94ea56c (ASoC: intel: cht_bsw_max98090_ti: Add pmc_plt_clk_0 quirk for Chromebook Gnawty)

[Po-Hsu Lin (cypressyew)]

Hello Jaime,
I've built a test kernel with commits mentioned in comment #4
can you give this Cosmic test kernel a try to see if it can fix your audio issue?
http://people.canonical.com/~phlin/kernel/lp-1811566-chromebook-Gnawty/

Thanks!

[Jaime Pérez (jaime-91)]

It does, as expected

[Brad Figg (brad-figg)]

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-cosmic' to 'verification-done-cosmic'. If the problem still exists, change the tag 'verification-needed-cosmic' to 'verification-failed-cosmic'.

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!

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 4.18.0-16.17

---------------
linux (4.18.0-16.17) cosmic; urgency=medium

  * linux: 4.18.0-16.17 -proposed tracker (LP: #1814749)

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

  * CVE-2018-16880
    - vhost: fix OOB in get_rx_bufs()

  * RTL8822BE WiFi Disabled in Kernel 4.18.0-12 (LP: #1806472)
    - SAUCE: staging: rtlwifi: allow RTLWIFI_DEBUG_ST to be disabled
    - [Config] CONFIG_RTLWIFI_DEBUG_ST=n
    - SAUCE: Add r8822be to signature inclusion list

  * kernel oops in bcache module (LP: #1793901)
    - SAUCE: bcache: never writeback a discard operation

  * CVE-2018-18397
    - userfaultfd: use ENOENT instead of EFAULT if the atomic copy user fails
    - userfaultfd: shmem: allocate anonymous memory for MAP_PRIVATE shmem
    - userfaultfd: shmem/hugetlbfs: only allow to register VM_MAYWRITE vmas
    - userfaultfd: shmem: add i_size checks
    - userfaultfd: shmem: UFFDIO_COPY: set the page dirty if VM_WRITE is not set

  * Ignore "incomplete report" from Elan touchpanels (LP: #1813733)
    - HID: i2c-hid: Ignore input report if there's no data present on Elan
      touchpanels

  * Vsock connect fails with ENODEV for large CID (LP: #1813934)
    - vhost/vsock: fix vhost vsock cid hashing inconsistent

  * Fix non-working pinctrl-intel (LP: #1811777)
    - pinctrl: intel: Do pin translation in other GPIO operations as well

  * ip6_gre: fix tunnel list corruption for x-netns (LP: #1812875)
    - ip6_gre: fix tunnel list corruption for x-netns

  * Backported commit breaks audio (fixed upstream) (LP: #1811566)
    - ASoC: intel: cht_bsw_max98090_ti: Add quirk for boards using pmc_plt_clk_0
    - ASoC: intel: cht_bsw_max98090_ti: Add pmc_plt_clk_0 quirk for Chromebook
      Clapper
    - ASoC: intel: cht_bsw_max98090_ti: Add pmc_plt_clk_0 quirk for Chromebook
      Gnawty

  * kvm_stat : missing python dependency (LP: #1798776)
    - tools/kvm_stat: switch to python3

  * [SRU] Fix Xorg crash with nomodeset when BIOS enable 64-bit fb addr
    (LP: #1812797)
    - vgaarb: Add support for 64-bit frame buffer address
    - vgaarb: Keep adding VGA device in queue

  * Fix non-working QCA Rome Bluetooth after S3 (LP: #1812812)
    - USB: Add new USB LPM helpers
    - USB: Consolidate LPM checks to avoid enabling LPM twice

  * [SRU] IO's are issued with incorrect Scatter Gather Buffer (LP: #1795453)
    - scsi: megaraid_sas: Use 63-bit DMA addressing

  * x86/mm: Found insecure W+X mapping at address (ptrval)/0xc00a0000
    (LP: #1813532)
    - x86/mm: Do not warn about PCI BIOS W+X mappings

  * CVE-2019-6133
    - fork: record start_time late

  * Fix not working Goodix touchpad (LP: #1811929)
    - HID: i2c-hid: Disable runtime PM on Goodix touchpad

  * bluetooth controller not detected with 4.15 kernel (LP: #1810797)
    - SAUCE: btqcomsmd: introduce BT_QCOMSMD_HACK
    - [Config] arm64: snapdragon: BT_QCOMSMD_HACK=y

  * X1 Extreme: only one of the two SSDs is loaded (LP: #1811755)
    - nvme-core: rework a NQN copying operation
    - nvme: pad fake subsys NQN vid and ssvid with zeros
    - nvme: introduce NVME_QUIRK_IGNORE_DEV_SUBNQN

  * Crash on "ip link add f...