[Bug 1955566] [NEW] iris driver doesn't load correctly

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You have been subscribed to a public bug by jeremyszu (os369510):

[Impact]

 * iris driver doesn't load with pci_id 4688. Instead, it uses llvm.
    we expect the Intel GPU uses iris driver.

[Test Plan]

 * $ DISPLAY=:0 glxinfo | grep -i opengl
OpenGL vendor string: Mesa/X.org
OpenGL renderer string: llvmpipe (LLVM 12.0.0, 256 bits)
...
OpenGL version string: 3.1 Mesa 21.0.3

 * After applying the fix, it shows:

 * $ DISPLAY=:0 glxinfo | grep -i opengl
OpenGL vendor string: Intel
OpenGL renderer string: Mesa Intel(R) Graphics (ADL-S GT1)
...
OpenGL version string: 4.6 (Compatibility Profile) Mesa 21.0.3 (git-d4975a0dbc)

[Where problems could occur]

 * This patch is backport the PCI ID mapping for enabling iris driver which is expected when users have a GPU.
 * If there is any issue occur then we need to fix it with iris driver.

[Other Info]

 * It already in upstream and we have a platform which using ADL-HX in OEM project. Thus, we need to enable iris on it at least on focal.
 * The patch is simple as to add "CHIPSET(0x4688, adl_gt1, "ADL-S GT1", "Intel(R) Graphics")" in "include/pci_ids/iris_pci_ids.h".
 * Patch backported from df5b14969f9869f363bcc8b2a564c85aaa481597

** Affects: oem-priority
     Importance: Critical
     Assignee: jeremyszu (os369510)
         Status: In Progress

** Affects: mesa (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: oem-priority originate-from-1955371 stella
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iris driver doesn't load correctly
https://bugs.launchpad.net/bugs/1955566
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