[Bug 1940504] Re: Support Alder Lake P graphics

[Timo Aaltonen]

oh, oem-5.14 was part of this bug :)

** Tags removed: verification-needed verification-needed-focal
** Tags added: verification-done verification-done-focal

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Title:
  Support Alder Lake P graphics

Status in libdrm package in Ubuntu:
  Fix Released
Status in linux-firmware package in Ubuntu:
  Fix Released
Status in mesa package in Ubuntu:
  Fix Released
Status in libdrm source package in Focal:
  Fix Committed
Status in linux-firmware source package in Focal:
  Fix Committed
Status in linux-oem-5.14 source package in Focal:
  Fix Committed
Status in mesa source package in Focal:
  Fix Committed

Bug description:
  [SRU Justification:linux-firmware]

  [Impact]

  It shows the firmware is missing, and runtime power management has been
  disabled:

    i915 0000:00:02.0: [drm] Failed to load DMC firmware
    i915/adlp_dmc_ver2_10.bin. Disabling runtime power management.

  [Fix]

  Upstream commit 3d32f216 ("i915: Add ADL-P DMC Support").

  [Test Case]

  Verified on Intel ADL-M/ADL-P RVPs.

  [Where problems could occur]

  It's a new firmware for new GPU, not possible to introduce
  regressions.

  [Other Info]

  Impish has this already. And while ADL-P/M support begins since v5.14,
  only focal (for oem-5.14) is being nominated.

  =========================================================

  [SRU Justification:mesa,libdrm]

  NOTE: this is for focal only, hirsute/impish do not and will not have
  kernel support for this.

  [Impact]

  ADL-P machines need to use the native driver.

  [Fix]

  Backport support from upstream.

  libdrm: a single patch from 2.4.107
  mesa: three commits to add pci-id's and a workaround
  kernel: needs drm sync from 5.14 (bug 1940085) plus additional backports

  [Test case]
  Boot a machine and check that it's using the native driver and that the usual workloads are fine.

  [Where things could go wrong]
  For older gpu's there's little to go wrong, since the commits are for ADL-P only.

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