wcn7850 issues
Baochen Qiang
quic_bqiang at quicinc.com
Sun Aug 18 19:33:35 PDT 2024
On 8/16/2024 8:23 PM, david Atkins wrote:
>> On 8/15/2024 4:38 AM, david Atkins wrote:
>>>>
>>>> On 8/6/2024 4:06 PM, david Atkins wrote:
>>>>> No support for EHT and therefore no MSC 12 or 13 which fits with the
>>>>> dmesg warning about it not being supported,
>>>> did not noted this ... So if AP does not support EHT, above warnings
>>>> makes sense, like you said.
>>>>
>>>
>>> Anseres inline, AP supports EHT
>>>
>>>> is this a card firmware
>>>>> issue rather than the driver?
>>>> did not follow you here, why is it an issue?
>>>>
>>>
>>> Is the firmware that’s uploaded to the card not supporting EHT?
>>>
>> FW does support EHT.
>>
>> You are checking scan results, so it is AP not advertising EHT support (actually
>> AP supports EHT, it is missing in scan results because IW does not print it. I
>> don't know your IW, but at least upstream IW does not print it currently), not
>> WCN7850.
>
>
> I have captured beacon packets from the AP, they show the presence of EHT, this is a snip from the packet decoded, is there something here that would prevent the Hamilton card seeing eht?
>
> Ext Tag: EHT Capabilities (802.11be D3.0)
> Ext Tag length: 14 (Tag len: 15)
> Ext Tag Number: EHT Capabilities (802.11be D3.0) (108)
> EHT MAC Capabilities Information: 0x0017, EPCS Priority Access Support, EHT OM Control Support, Triggered TXOP Sharing Mode 1 Support, Restricted TWT Support, Maximum MPDU Length: 3 895, EHT Link Adaptation Support: No feedback
> .... .... .... ...1 = EPCS Priority Access Support: Supported
> .... .... .... ..1. = EHT OM Control Support: Supported
> .... .... .... .1.. = Triggered TXOP Sharing Mode 1 Support: Supported
> .... .... .... 0... = Triggered TXOP Sharing Mode 2 Support: Not supported
> .... .... ...1 .... = Restricted TWT Support: Supported
> .... .... ..0. .... = SCS Traffic Description Support: Not supported
> .... .... 00.. .... = Maximum MPDU Length: 3 895 (0x0)
> .... ...0 .... .... = Maximum A-MPDU Length Exponent Extension: 0
> .... ..0. .... .... = EHT TRS Support: Not supported
> .... .0.. .... .... = TXOP Return Support In TXOP Sharing Mode 2: Not supported
> .... 0... .... .... = Two BQRs Support: Not supported
> ..00 .... .... .... = EHT Link Adaptation Support: No feedback (0)
> 00.. .... .... .... = Reserved: 0x0
> EHT PHY Capabilities Information
> EHT PHY Bits 0-15: 0xffe0
> .... .... .... ...0 = Reserved: 0x0
> .... .... .... ..0. = Support For 320 MHz in 6 GHz: Not supported
> .... .... .... .0.. = Support for 242-tone RU in BW Wider than 20 MHz: Not supported
> .... .... .... 0... = NDP With 4x EHT-LTF And 3.2 us GI: Not supported
> .... .... ...0 .... = Partial Bandwidth UL MU-MIMO: Not supported
> .... .... ..1. .... = SU Beamformer: Supported
> .... .... .1.. .... = SU Beamformee: Supported
> .... ..11 1... .... = Beamformee SS (<= 80 MHz): 0x7
> ...1 11.. .... .... = Beamformee SS (= 160 MHz): 0x7
> 111. .... .... .... = Beamformee SS (= 320 MHz): 0x7
> EHT PHY Bits 16-31: 0x00db
> .... .... .... .011 = Number Of Sounding Dimensions (<= 80 MHz): 0x3
> .... .... ..01 1... = Number Of Sounding Dimensions (= 160 MHz): 0x3
> .... ...0 11.. .... = Number Of Sounding Dimensions (= 320 MHz): 0x3
> .... ..0. .... .... = Ng = 16 SU Feedback: Not supported
> .... .0.. .... .... = Ng = 16 MU Feedback: Not supported
> .... 0... .... .... = Codebook Size = (4,2) SU Feedback: Not supported
> ...0 .... .... .... = Codebook Size = (7,5) MU Feedback: Not supported
> ..0. .... .... .... = Triggered SU Beamforming Feedback: Not supported
> .0.. .... .... .... = Triggered MU Beamforming Partial BW Feedback: Not supported
> 0... .... .... .... = Triggered CQI Feedback: Not supported
> EHT PHY Bits 32-39: 0x18
> .... ...0 = Partial Bandwidth DL MU-MIMO: Not supported
> .... ..0. = EHT PSR-Based SR support: Not supported
> .... .0.. = Power Boost Factor Support: Not supported
> .... 1... = EHT MU PPDU With 4x EHT-LTF and 0.8 us GI: Supported
> 0001 .... = Max Nc: 1
> EHT PHY Bits 40-63: 0x3ed876
> .... .... .... .... .... ...0 = Non-Triggered CQI Feedback: Not supported
> .... .... .... .... .... ..1. = Tx 1024-QAM & 4096-QAM < 242-tone RU Support: Supported
> .... .... .... .... .... .1.. = Rx 1024-QAM & 4096-QAM < 242-tone-RU Support: Supported
> .... .... .... .... .... 0... = PPE Thresholds Present: Not Present
> .... .... .... .... ..11 .... = Common Nominal Packet Padding: 3
> .... .... .... .000 01.. .... = Maximum Number Of Supported EHT-LTFs: 1
> .... .... .101 1... .... .... = Support Of MCS 15: 11
> .... .... 1... .... .... .... = Support Of EHT DUP (MCS 14) in 6 GHz: Supported
> .... ...0 .... .... .... .... = Support For 20 MHz Operating STA Receiving NDP With Wider BW: Not supported
> .... ..1. .... .... .... .... = Non-OFDMA UL MU-MIMO (BW <= 80 MHz): Supported
> .... .1.. .... .... .... .... = Non-OFDMA UL MU-MIMO (BW = 160 MHz): Supported
> .... 1... .... .... .... .... = Non-OFDMA UL MU-MIMO (BW = 320 MHz): Supported
> ...1 .... .... .... .... .... = MU Beamformer (BW <= 80 MHz): Supported
> ..1. .... .... .... .... .... = MU Beamformer (BW = 160 MHz): Supported
> .0.. .... .... .... .... .... = MU Beamformer (BW = 320 MHz): Not supported
> 0... .... .... .... .... .... = TB Sounding Feedback Rate Limit: Not supported
> EHT PHY Bits 64-71: 0x444400
> .... ...0 = Rx 1024-QAM In Wider Bandwidth DL OFDMA Support: Not supported
> .... ..0. = Rx 4096-QAM In Wider Bandwidth DL OFDMA SUpport: Not supported
> 0000 00.. = Reserved: 0x00
> Supported EHT-MCS and NSS Set
> EHT-MCS Map (BW <= 80MHz): 0x444444
> .... .... .... .... .... 0100 = Rx Max Nss That Supports EHT-MCS 0-9: 4
> .... .... .... .... 0100 .... = Tx Max Nss That Supports EHT-MCS 0-9: 4
> .... .... .... 0100 .... .... = Rx Max Nss That Supports EHT-MCS 10-11: 4
> .... .... 0100 .... .... .... = Tx Max Nss That Supports EHT-MCS 10-11: 4
> .... 0100 .... .... .... .... = Rx Max Nss That Supports EHT-MCS 12-13: 4
> 0100 .... .... .... .... .... = Tx Max Nss That Supports EHT-MCS 12-13: 4
> Ext Tag: EHT Operation (802.11be D3.0)
> Ext Tag length: 8 (Tag len: 9)
> Ext Tag Number: EHT Operation (802.11be D3.0) (106)
> EHT Operation Parameters: 0x01, EHT Operation Information Present
> .... ...1 = EHT Operation Information Present: True
> .... ..0. = Disabled Subchannel Bitmap Present: False
> .... .0.. = EHT Default PE Duration: False
> .... 0... = Group Addressed BU Indication Limit: False
> ..00 .... = Group Addressed BU Indication Exponent: 0
> 00.. .... = Reserved: 0x0
> Basic EHT-MCS And Nss Set: 0x44444444
this means AP requires STA NSS to be equal or larger than 4, however WCN7850 only support 2, so connection in EHT is rejected.
> Control: 0x02, Channel Width: 80 MHz EHT BSS bandwidth
> .... .010 = Channel Width: 80 MHz EHT BSS bandwidth (2)
> 0000 0... = Reserved: 0x00
> CCFS0: 0x0000006a
> CCFS1: 0x00000000
>
>
More information about the ath12k
mailing list