How upstream kernel version correlates to version from Debian?

["Alexander V. Makartsev" <avbetev@gmail.com>]

    Hello, Debian users.
    
    I have stability issues (freezing) on my laptop running Debian 12
    (current stable), and, according to logs, the culprit is kernel
    module i915.
    
    My kernel version:
    $ uname -a
    Linux hostname 6.1.0-30-amd64 #1 SMP PREEMPT_DYNAMIC Debian
    6.1.124-1 (2025-01-12) x86_64 GNU/Linux
    
    My GPU is CPU integrated:
    $ lspci -nn -v | grep VGA
    00:02.0 VGA compatible controller [0300]: Intel Corporation Alder
    Lake-P GT1 [UHD Graphics] [8086:46a3] (rev 0c) (prog-if 00 [VGA
    controller])
    
    A few relevant lines from syslog after freeze and reboot:
    ...
    Jan 18 02:08:26 hostname kernel: i915 0000:00:02.0: Uninitialized
    forcewake domain(s) 0x8 accessed at 0x1cd000
    Jan 18 02:08:26 hostname kernel: WARNING: CPU: 2 PID: 182 at
    drivers/gpu/drm/i915/intel_uncore.c:950 find_fw_domain+0xcd/0xe0
    [i915]
    ...
    Jan 18 02:08:26 hostname kernel: i915 0000:00:02.0: [drm] GPU HANG:
    ecode 12:1:85dfbffd, in Xorg [848]
    Jan 18 02:08:26 hostname kernel: i915 0000:00:02.0: [drm] Resetting
    chip for stopped heartbeat on rcs0
    Jan 18 02:08:27 hostname kernel: i915 0000:00:02.0: [drm] Xorg[848]
    context reset due to GPU hang
    Jan 18 02:08:27 hostname kernel: i915 0000:00:02.0: [drm] GuC
    firmware i915/adlp_guc_70.bin version 70.36.0
    Jan 18 02:08:27 hostname kernel: i915 0000:00:02.0: [drm] HuC
    firmware i915/tgl_huc.bin version 7.9.3
    Jan 18 02:08:27 hostname kernel: i915 0000:00:02.0: [drm] HuC
    authenticated
    Jan 18 02:08:27 hostname kernel: i915 0000:00:02.0: [drm] GuC
    submission enabled
    Jan 18 02:08:27 hostname kernel: i915 0000:00:02.0: [drm] GuC SLPC
    enabled
    ...
    
    Logs with call traces: 
    https://paste.debian.net/1345769/
    
    Things I've tried so far:
    1. Updated Intel graphics firmware to latest version available on
    git.kernel.org 
    Things slightly improved, now I have a freeze after a hour or two
    instead of a few minutes. My guess is that firmware got better at
    "GPU hang" handling and recovery, but didn't fixed the bug itself.
    2. Switched Xorg driver from "modesetting" to older
    "xf86-video-intel".
    My GPU appears to be too modern for it, I run into graphical
    artifacts, xorg server couldn't recognize GPU chipset, etc, so I had
    to revert back to "modesetting".
    3. Tried to set "enable_guc=0" option for i915 module, which
    disabled GuC offloading.
    While I couldn't reproduce the issue anymore and my laptop won't
    freeze even after a few hours, instead I got poor performance,
    higher than usual fan noise and battery drain. 
    It also taints the kernel by Intel's design, so I had to revert back
    to default (which functionally seems to be "enable_guc=3").
    
    There is also an option to try official backported Intel driver
    which builds out-of-tree DKMS module, but I rather look for a more
    standard solution.
    https://dgpu-docs.intel.com/releases/releases.html
    
    Searching for "Uninitialized forcewake domain(s) 0x8 accessed at"
    gave me a result leading to a patch which could be addressing the
    same issue I have.
    https://www.spinics.net/lists/intel-gfx/msg274293.html
    
    So now my questions are: 
    How to check if this patch was added upstream to git.kernel.org and
    to which kernel version?
    And how upstream kernel version correlates to kernel version from
    Debian, so I can get a reference point to see what patches for i915
    were added?

--

 With kindest regards, Alexander.

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