Fix no picture from HDMI when it's plugged after boot

[Kai-Heng Feng]

[Impact]
On Intel CML desktop, there's no HDMI output when the cable is not
connected pre-boot.

[Fix]
Properly handle lane polarity so the driver can write different values
to the register to enable the port.

[Test]
1. Boot with DP display.
2. Connect HDMI under GNOME desktop.
3. No picture on HDMI monitor.
With the fix applied, the issue is resolved.

[Where problems could occur]
If the BIOS VBT table is not correct, which did happen in the pase, this
fix may break those ports.

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

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

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!

[Francois Thirioux (fthx)]

Hi,

[Focal, Thinkpad T480s, 8550u/intel igpu]

Unfortunately I suspect this:

* Fix no picture from HDMI when it's plugged after boot (LP: #1924238)
    - drm/i915/display: Handle lane polarity for DDI port

in *-1024 OEM 5.10 kernel, that I do use in Focal, did break HDMI hotplug after GNOME is loaded.
HDMI works if plugged when at GDM login screen and then in GNOME itself. Additionally, my laptop's sleep seems to be broken (I don't remember if this happens when HDMI is working or not).

[Kai-Heng Feng (kaihengfeng)]

Francois, what was the last working kernel?

[Francois Thirioux (fthx)]

Previous one: *-1023

I'm sure of that because I use HDMI every day, at work or at home. And I checked my apt/Synaptic's history. Nothing else was updated this day apart kernels. I updated GS and Mutter to 3.36.9 *way after* having experienced the issue for the first time.

And kernel 5.8 hwe is working nicely with HDMI...

Please note that I did have some partially similar issues with 5.10 oem with my Dell WD15 dock (2 displays) at work: after unplugging the usb-c, I have to force the shutdown and sleep is broken. I absolutely don't know if this is related to this bug here.

[Kai-Heng Feng (kaihengfeng)]

There are many i915 changes between 1023 and 1024. Can you please file a new bug?

[Francois Thirioux (fthx)]

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1926597

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux-oem-5.10 - 5.10.0-1025.26

---------------
linux-oem-5.10 (5.10.0-1025.26) focal; urgency=medium

  * focal/linux-oem-5.10: 5.10.0-1025.26 -proposed tracker (LP: #1926155)

  * Packaging resync (LP: #1786013)
    - update dkms package versions

  * CirrusLogic: Cracking noises appears in built-in speaker when output volume
    is set >80% (LP: #1924997)
    - SAUCE: ALSA: hda/cirrus: Use CS8409 Equalizer to fix abnormal sounds on
      Bullseye

 -- Timo Aaltonen <email address hidden> Mon, 26 Apr 2021 16:18:11 +0300

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

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

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 - 5.11.0-18.19

---------------
linux (5.11.0-18.19) hirsute; urgency=medium

  * hirsute/linux: 5.11.0-18.19 -proposed tracker (LP: #1927578)

  * Packaging resync (LP: #1786013)
    - update dkms package versions

  * Introduce the 465 driver series, fabric-manager, and libnvidia-nscq
    (LP: #1925522)
    - debian/dkms-versions -- add NVIDIA 465 and migrate 450 to 460

  * linux-image-5.0.0-35-generic breaks checkpointing of container
    (LP: #1857257)
    - SAUCE: overlayfs: fix incorrect mnt_id of files opened from map_files

  * Hirsute update: v5.11.17 upstream stable release (LP: #1927535)
    - vhost-vdpa: protect concurrent access to vhost device iotlb
    - Revert "UBUNTU: SAUCE: ovl: Restore vm_file value when lower fs mmap fails"
    - ovl: fix reference counting in ovl_mmap error path
    - coda: fix reference counting in coda_file_mmap error path
    - amd/display: allow non-linear multi-planar formats
    - drm/amdgpu: reserve fence slot to update page table
    - drm/amdgpu: fix GCR_GENERAL_CNTL offset for dimgrey_cavefish
    - gpio: omap: Save and restore sysconfig
    - KEYS: trusted: Fix TPM reservation for seal/unseal
    - vdpa/mlx5: Set err = -ENOMEM in case dma_map_sg_attrs fails
    - pinctrl: lewisburg: Update number of pins in community
    - block: return -EBUSY when there are open partitions in blkdev_reread_part
    - pinctrl: core: Show pin numbers for the controllers with base = 0
    - arm64: dts: allwinner: Revert SD card CD GPIO for Pine64-LTS
    - bpf: Allow variable-offset stack access
    - bpf: Refactor and streamline bounds check into helper
    - bpf: Tighten speculative pointer arithmetic mask
    - perf/x86/intel/uncore: Remove uncore extra PCI dev HSWEP_PCI_PCU_3
    - perf/x86/kvm: Fix Broadwell Xeon stepping in isolation_ucodes[]
    - perf auxtrace: Fix potential NULL pointer dereference
    - perf map: Fix error return code in maps__clone()
    - HID: google: add don USB id
    - HID: asus: Add support for 2021 ASUS N-Key keyboard
    - HID: alps: fix error return code in alps_input_configured()
    - HID cp2112: fix support for multiple gpiochips
    - HID: wacom: Assign boolean values to a bool variable
    - soc: qcom: geni: shield geni_icc_get() for ACPI boot
    - dmaengine: xilinx: dpdma: Fix descriptor issuing on video group
    - dmaengine: xilinx: dpdma: Fix race condition in done IRQ
    - ARM: dts: Fix swapped mmc order for omap3
    - m68k: fix flatmem memory model setup
    - net: geneve: check skb is large enough for IPv4/IPv6 header
    - dmaengine: tegra20: Fix runtime PM imbalance on error
    - s390/entry: save the caller of psw_idle
    - arm64: kprobes: Restore local irqflag if kprobes is cancelled
    - xen-netback: Check for hotplug-status existence before watching
    - cavium/liquidio: Fix duplicate argument
    - csky: change a Kconfig symbol name to fix e1000 build error
    - ia64: fix discontig.c section mismatches
    - ia64: tools: remove duplicate definition of ia64_mf() on ia64
    - x86/crash: Fix crash_setup_memmap_entries() out-of-bounds access
    - net: hso: fix NULL-deref on disconnect regression
    - USB: CDC-ACM...

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 5.11.0-18.19+21.10.1

---------------
linux (5.11.0-18.19+21.10.1) impish; urgency=medium

  * impish/linux: 5.11.0-18.19+21.10.1 -proposed tracker (LP: #1927560)

  * Packaging resync (LP: #1786013)
    - [Packaging] update update.conf
    - update dkms package versions

  [ Ubuntu: 5.11.0-18.19 ]

  * hirsute/linux: 5.11.0-18.19 -proposed tracker (LP: #1927578)
  * Packaging resync (LP: #1786013)
    - update dkms package versions
  * Introduce the 465 driver series, fabric-manager, and libnvidia-nscq
    (LP: #1925522)
    - debian/dkms-versions -- add NVIDIA 465 and migrate 450 to 460
  * linux-image-5.0.0-35-generic breaks checkpointing of container
    (LP: #1857257)
    - SAUCE: overlayfs: fix incorrect mnt_id of files opened from map_files
  * Hirsute update: v5.11.17 upstream stable release (LP: #1927535)
    - vhost-vdpa: protect concurrent access to vhost device iotlb
    - Revert "UBUNTU: SAUCE: ovl: Restore vm_file value when lower fs mmap fails"
    - ovl: fix reference counting in ovl_mmap error path
    - coda: fix reference counting in coda_file_mmap error path
    - amd/display: allow non-linear multi-planar formats
    - drm/amdgpu: reserve fence slot to update page table
    - drm/amdgpu: fix GCR_GENERAL_CNTL offset for dimgrey_cavefish
    - gpio: omap: Save and restore sysconfig
    - KEYS: trusted: Fix TPM reservation for seal/unseal
    - vdpa/mlx5: Set err = -ENOMEM in case dma_map_sg_attrs fails
    - pinctrl: lewisburg: Update number of pins in community
    - block: return -EBUSY when there are open partitions in blkdev_reread_part
    - pinctrl: core: Show pin numbers for the controllers with base = 0
    - arm64: dts: allwinner: Revert SD card CD GPIO for Pine64-LTS
    - bpf: Allow variable-offset stack access
    - bpf: Refactor and streamline bounds check into helper
    - bpf: Tighten speculative pointer arithmetic mask
    - perf/x86/intel/uncore: Remove uncore extra PCI dev HSWEP_PCI_PCU_3
    - perf/x86/kvm: Fix Broadwell Xeon stepping in isolation_ucodes[]
    - perf auxtrace: Fix potential NULL pointer dereference
    - perf map: Fix error return code in maps__clone()
    - HID: google: add don USB id
    - HID: asus: Add support for 2021 ASUS N-Key keyboard
    - HID: alps: fix error return code in alps_input_configured()
    - HID cp2112: fix support for multiple gpiochips
    - HID: wacom: Assign boolean values to a bool variable
    - soc: qcom: geni: shield geni_icc_get() for ACPI boot
    - dmaengine: xilinx: dpdma: Fix descriptor issuing on video group
    - dmaengine: xilinx: dpdma: Fix race condition in done IRQ
    - ARM: dts: Fix swapped mmc order for omap3
    - m68k: fix flatmem memory model setup
    - net: geneve: check skb is large enough for IPv4/IPv6 header
    - dmaengine: tegra20: Fix runtime PM imbalance on error
    - s390/entry: save the caller of psw_idle
    - arm64: kprobes: Restore local irqflag if kprobes is cancelled
    - xen-netback: Check for hotplug-status existence before watching
    - cavium/liquidio: Fix duplicate argument
    - csky: change a Kconfig symbol name to fix e1000 build error
    - ia64: fix discontig.c section mis...