Re: phy: qcom: qmp-combo: Glymur USB Gen2 fails on one port (chip rev 2.0)

[Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>]

On 10/28/26 12:55 AM, Burke Cates wrote:
> On 27/10/2026 04:07, Konrad Dybcio wrote:
>> Please check the attached patch.
> 
> Thanks, Konrad: your patch fixes C2. With it, the RTL8159 10G NIC
> enumerates at 10000M on C2 in 8 of 8 tries (both cables, both
> orientations, present at boot and hotplugged, including a hotplug
> after a cold boot with C2 empty), with no regressions on C1 or DP.
> 
> I tested on the A16 (UX3607OA, SoC ID 662, revision 2.0, BIOS
> UX3607OA.312), on v7.3 plus out-of-tree Glymur platform/board patches.
> Your patch applied as-is, and I removed my local PHY changes so it
> alone programs the USB tables.
> 
>   - RTL8159 on C2: 10000M (SuperSpeed Plus Gen 2x1) in 8 of 8 tries,
>     with both C-C cables from my report, in both orientations, present
>     at boot and hotplugged. No -71 or resets during SuperSpeed
>     enumeration.
>   - Cold boot with C2 empty (my original failure case), then hotplug:
>     10000M in both orientations.
>   - A VIA VL822 USB 3.2 Gen2 hub on C2 (a third cable) enumerates at
>     10000M, and the NIC behind it does too.
>   - C2 stays at Gen2 across s2idle (no disconnect or reset on resume).
>   - C1 is still Gen2 in both orientations.
>   - DP alt mode on C2 still trains 4 lanes at HBR (1080p60 monitor).
>   - With the NIC present at boot on C2, iperf3 to a 10G host gave
>     about 4.6 Gbit/s each way (TX 4.58, RX 4.71; 4.55 + 4.56 Gbit/s
>     bidirectional over 60 s). The NIC's link partner is 5GbE.
> 
> Under sustained load I see about one burst of "r8152 ... Tx status
> -71" per minute, each followed by an r8152 reset of the device.
> Traffic continues and the link stays at Gen2.

Is this something you've also seen with your local changes?

Konrad