[Intel-gfx] Intel Arc A370M vs Linux 5.19

[Daniel J Blueman]

Dear Intel et al,

With a HP Spectre x360 16 16-f1xxx/891D (Intel i7-1260P) with an Arc
A370M GPU [1] running the latest Ubuntu 22.10 5.19.0-15-generic
kernel, we see:

i915 0000:03:00.0: Your graphics device 5693 is not properly supported
by the driver in this kernel version. To force driver probe anyway,
use i915.force_probe=5693

Since the GPU is unmanaged, battery life is around 30% of what it
could be. Unsurprisingly, adding i915.force_probe=5693 causes
additional  issues. Given a lack of BIOS option to disable the GPU, is
there any advice for Linux support or at least putting the GPU into
D3? I see only Windows drivers on the official support page [2], and
Linux 6.0-rc5 isn't buildable [3].

Thanks,
  Daniel

-- [1] 03:00.0 Display controller: Intel Corporation DG2 [Arc A370M] (rev 05)
    Subsystem: Hewlett-Packard Company Device 891d
    Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B- DisINTx-
    Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
    IOMMU group: 23
    Region 0: Memory at 5f000000 (64-bit, non-prefetchable) [disabled]
[size=16M]
    Region 2: Memory at 6000000000 (64-bit, prefetchable) [disabled] [size=4G]
    Expansion ROM at <ignored> [disabled]
    Capabilities: [40] Vendor Specific Information: Len=0c <?>
    Capabilities: [70] Express (v2) Endpoint, MSI 00
        DevCap:    MaxPayload 128 bytes, PhantFunc 0, Latency L0s <64ns, L1 <1us
            ExtTag+ AttnBtn- AttnInd- PwrInd- RBE+ FLReset+ SlotPowerLimit 0W
        DevCtl:    CorrErr- NonFatalErr- FatalErr- UnsupReq-
            RlxdOrd+ ExtTag+ PhantFunc- AuxPwr- NoSnoop+ FLReset-
            MaxPayload 128 bytes, MaxReadReq 128 bytes
        DevSta:    CorrErr- NonFatalErr- FatalErr- UnsupReq- AuxPwr- TransPend-
        LnkCap:    Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Exit
Latency L0s <64ns, L1 <1us
            ClockPM- Surprise- LLActRep- BwNot- ASPMOptComp+
        LnkCtl:    ASPM Disabled; RCB 64 bytes, Disabled- CommClk-
            ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
        LnkSta:    Speed 2.5GT/s, Width x1
            TrErr- Train- SlotClk- DLActive- BWMgmt- ABWMgmt-
        DevCap2: Completion Timeout: Range B, TimeoutDis+ NROPrPrP- LTR+
             10BitTagComp+ 10BitTagReq+ OBFF Not Supported, ExtFmt+ EETLPPrefix-
             EmergencyPowerReduction Not Supported, EmergencyPowerReductionInit-
             FRS- TPHComp- ExtTPHComp-
             AtomicOpsCap: 32bit- 64bit- 128bitCAS-
        DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis- LTR+
10BitTagReq- OBFF Disabled,
             AtomicOpsCtl: ReqEn-
        LnkCap2: Supported Link Speeds: 2.5GT/s, Crosslink- Retimer-
2Retimers- DRS-
        LnkCtl2: Target Link Speed: 2.5GT/s, EnterCompliance- SpeedDis-
             Transmit Margin: Normal Operating Range,
EnterModifiedCompliance- ComplianceSOS-
             Compliance Preset/De-emphasis: -6dB de-emphasis, 0dB preshoot
        LnkSta2: Current De-emphasis Level: -6dB,
EqualizationComplete- EqualizationPhase1-
             EqualizationPhase2- EqualizationPhase3- LinkEqualizationRequest-
             Retimer- 2Retimers- CrosslinkRes: unsupported
    Capabilities: [ac] MSI: Enable- Count=1/1 Maskable+ 64bit+
        Address: 0000000000000000  Data: 0000
        Masking: 00000000  Pending: 00000000
    Capabilities: [d0] Power Management version 3
        Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0+,D1-,D2-,D3hot+,D3cold-)
        Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
    Capabilities: [100 v1] Alternative Routing-ID Interpretation (ARI)
        ARICap:    MFVC- ACS-, Next Function: 0
        ARICtl:    MFVC- ACS-, Function Group: 0
    Capabilities: [420 v1] Physical Resizable BAR
        BAR 2: current size: 4GB, supported: 256MB 512MB 1GB 2GB 4GB
    Capabilities: [400 v1] Latency Tolerance Reporting
        Max snoop latency: 15728640ns
        Max no snoop latency: 15728640ns
    Kernel modules: i915

-- [2] https://www.intel.com/content/www/us/en/support/products/228342/graphics/intel-arc-dedicated-graphics-family/intel-arc-a-series-graphics/intel-arc-a370m-graphics.html
-- [3] https://kernel.ubuntu.com/~kernel-ppa/mainline/v6.0-rc5/
-- 
Daniel J Blueman