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From:   Sam Samy <to.swami1@gmail.com>
Date:   Mon, 13 May 2019 11:10:27 -0700
Message-ID: <CAPGJ1o-i8Gy8baAf+MHcuWoF6oHuSiRYwyADCZDkYS8fmeOy8A@mail.gmail.com>
Subject: Re: ath10k 5Ghz RSSI low
To:     Ben Greear <greearb@candelatech.com>
Cc:     linux-wireless@vger.kernel.org
Content-Type: text/plain; charset="UTF-8"
Sender: linux-wireless-owner@vger.kernel.org
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hi Ben,

  I also looked at the TPC on the stock firmware on the AP. There is a
difference.

Here is the snippet from stock firmware:

TPC Config for channel 5765 mode 10
**************************************************
CTL           = 0x10   Reg. Domain           = 20
Antenna Gain  =  0     Reg. Max Antenna Gain = 12
Power Limit   = 63     Reg. Max Power        = 60
Num tx chains =  2    Num  Supported Rates  = 109
**************************************************
**************** CDD  POWER TABLE ****************
**************************************************

Where as in openwrt it is:

*************************************
TPC config for channel 5765 mode 10
*************************************
CTL        =  0x10 Reg. Domain        = 58
Antenna Gain    =  0 Reg. Max Antenna Gain    =   0
Power Limit    = 60 Reg. Max Power        = 30
Num tx chains    =  2 Num supported rates    = 109
********************************


So looks like reg ,domain is different even though both are US.
(Although I didnt set anything on stock firmware. The countrycode from
iwpriv get_countrycode says its 841.)

Also, the antenna gain seems different between stock and openwrt firmware..


How to change the reg. domain like in stock firmware in openwrt
although I set to US in the uci.

root@OpenWrt:/sys# uci show | grep country
uhttpd.defaults.country='ZZ'
wireless.radio0.country='US'
wireless.radio1.country='US'
wireless.radio2.country='US'
root@OpenWrt:/sys#

Thanks


On Mon, May 13, 2019 at 10:36 AM Sam Samy <to.swami1@gmail.com> wrote:
>
> > Probably it is a board-file and/or calibration data issue then.
> >
> > The debugfs 'ath10k/tpc_stats' file may show very low values?
>
> I am not sure if the values are right. Here is one of the 5Ghz radio stats:
>
> root@OpenWrt:/sys# cat ./kernel/debug/ieee80211/phy0/ath10k/tpc_stats
>
> *************************************
> TPC config for channel 5320 mode 10
> *************************************
> CTL        =  0x10 Reg. Domain        = 58
> Antenna Gain    =  0 Reg. Max Antenna Gain    =   0
> Power Limit    = 46 Reg. Max Power        = 46
> Num tx chains    =  2 Num supported rates    = 129
> ********************************
> ******************* CDD POWER TABLE ****************
> ********************************
> No.  Preamble Rate_code tpc_value0 tpc_value1 tpc_value2 tpc_value3
>        0 CCK 0x40        0        0
>        1 CCK 0x41        0        0
>        2 CCK 0x42        0        0
>        3 CCK 0x43        0        0
>        4 OFDM 0x 0       36       34
>        5 OFDM 0x 1       38       34
>        6 OFDM 0x 2       38       34
>        7 OFDM 0x 3       38       34
>        8 OFDM 0x 4       34       34
>        9 OFDM 0x 5       38       34
>       10 OFDM 0x 6       38       34
>       11 OFDM 0x 7       38       34
>       12 HT20 0x80       38       34
>       13 HT20 0x81       38       34
>       14 HT20 0x82       38       34
>       15 HT20 0x83       38       34
>       16 HT20 0x84       38       34
>       17 HT20 0x85       36       34
>       18 HT20 0x86       34       34
>       19 HT20 0x87       32       32
>       20 HT20 0x90       38       38
>       21 HT20 0x91       38       38
>       22 HT20 0x92       38       38
>       23 HT20 0x93       38       38
>       24 HT20 0x94       38       38
>       25 HT20 0x95       36       36
>       26 HT20 0x96       34       34
>       27 HT20 0x97       32       32
>       28 HT40 0x80       37       34
>       29 HT40 0x81       37       34
>       30 HT40 0x82       37       34
>       31 HT40 0x83       37       34
>       32 HT40 0x84       37       34
>       33 HT40 0x85       35       34
>       34 HT40 0x86       33       33
>       35 HT40 0x87       31       31
>       36 HT40 0x90       37       37
>       37 HT40 0x91       37       37
>       38 HT40 0x92       37       37
>       39 HT40 0x93       37       37
>       40 HT40 0x94       37       37
>       41 HT40 0x95       35       35
>       42 HT40 0x96       33       33
>       43 HT40 0x97       31       31
>       44 VHT20 0xc0       38       34
>       45 VHT20 0xc1       38       34
>       46 VHT20 0xc2       38       34
>       47 VHT20 0xc3       38       34
>       48 VHT20 0xc4       38       34
>       49 VHT20 0xc5       36       34
>       50 VHT20 0xc6       34       34
>       51 VHT20 0xc7       32       32
>       52 VHT20 0xc8       31       31
>       53 VHT20 0xc9       30       30
>       54 VHT20 0xd0       38       38
>       55 VHT20 0xd1       38       38
>       56 VHT20 0xd2       38       38
>       57 VHT20 0xd3       38       38
>       58 VHT20 0xd4       38       38
>       59 VHT20 0xd5       36       36
>       60 VHT20 0xd6       34       34
>       61 VHT20 0xd7       32       32
>       62 VHT20 0xd8       31       31
>       63 VHT20 0xd9       30       30
>       64 VHT40 0xc0       37       34
>       65 VHT40 0xc1       37       34
>       66 VHT40 0xc2       37       34
>       67 VHT40 0xc3       37       34
>       68 VHT40 0xc4       37       34
>       69 VHT40 0xc5       35       34
>       70 VHT40 0xc6       33       33
>       71 VHT40 0xc7       31       31
>       72 VHT40 0xc8       30       30
>       73 VHT40 0xc9       29       29
>       74 VHT40 0xd0       37       37
>       75 VHT40 0xd1       37       37
>       76 VHT40 0xd2       37       37
>       77 VHT40 0xd3       37       37
>       78 VHT40 0xd4       37       37
>       79 VHT40 0xd5       35       35
>       80 VHT40 0xd6       33       33
>       81 VHT40 0xd7       31       31
>       82 VHT40 0xd8       30       30
>       83 VHT40 0xd9       29       29
>       84 VHT80 0xc0       36       34
>       85 VHT80 0xc1       36       34
>       86 VHT80 0xc2       36       34
>       87 VHT80 0xc3       36       34
>       88 VHT80 0xc4       36       34
>       89 VHT80 0xc5       34       34
>       90 VHT80 0xc6       32       32
>       91 VHT80 0xc7       30       30
>       92 VHT80 0xc8       29       29
>       93 VHT80 0xc9       28       28
>       94 VHT80 0xd0       36       36
>       95 VHT80 0xd1       36       36
>       96 VHT80 0xd2       36       36
>       97 VHT80 0xd3       36       36
>       98 VHT80 0xd4       36       36
>       99 VHT80 0xd5       34       34
>      100 VHT80 0xd6       32       32
>      101 VHT80 0xd7       30       30
>      102 VHT80 0xd8       29       29
>      103 VHT80 0xd9       28       28
>      104 HTCUP 0x40       36       36
>      105 HTCUP 0x 0       36       34
>      106 HTCUP 0x40       36       36
>      107 HTCUP 0x 0       36       34
>      108 HTCUP 0x 0       36       34
>      109 HTCUP 0x7a       34       34
>      110 HTCUP 0x8a       32       32
>      111 HTCUP 0x a       30       30
>      112 HTCUP 0xee       27       27
>      113 HTCUP 0xa6       26       26
>      114 HTCUP 0x90       36       36
>      115 HTCUP 0x1d       36       36
>      116 HTCUP 0x80       36       34
>      117 HTCUP 0x41       36       36
>      118 HTCUP 0xd9       36       36
>      119 HTCUP 0x64       34       34
>      120 HTCUP 0xf9       32       32
>      121 HTCUP 0x 0       30       30
>      122 HTCUP 0x 0       27       27
>      123 HTCUP 0x 0       26       26
>      124 HTCUP 0x64        0        0
>      125 HTCUP 0x 0       37       34
>      126 HTCUP 0x31        0        0
>      127 HTCUP 0x 4       37       34
>      128 HTCUP 0x 0       38       34
> ***********************************
> ********************************
> ******************* STBC POWER TABLE ****************
> ********************************
> No.  Preamble Rate_code tpc_value0 tpc_value1 tpc_value2 tpc_value3
>        0 CCK 0x40        0        0
>        1 CCK 0x41        0        0
>        2 CCK 0x42        0        0
>        3 CCK 0x43        0        0
>        4 OFDM 0x 0       36       36
>        5 OFDM 0x 1       38       38
>        6 OFDM 0x 2       38       38
>        7 OFDM 0x 3       38       38
>        8 OFDM 0x 4       34       34
>        9 OFDM 0x 5       38       38
>       10 OFDM 0x 6       38       38
>       11 OFDM 0x 7       38       38
>       12 HT20 0x80       38       38
>       13 HT20 0x81       38       38
>       14 HT20 0x82       38       38
>       15 HT20 0x83       38       38
>       16 HT20 0x84       38       38
>       17 HT20 0x85       36       36
>       18 HT20 0x86       34       34
>       19 HT20 0x87       32       32
>       20 HT20 0x90       38       38
>       21 HT20 0x91       38       38
>       22 HT20 0x92       38       38
>       23 HT20 0x93       38       38
>       24 HT20 0x94       38       38
>       25 HT20 0x95       36       36
>       26 HT20 0x96       34       34
>       27 HT20 0x97       32       32
>       28 HT40 0x80       37       37
>       29 HT40 0x81       37       37
>       30 HT40 0x82       37       37
>       31 HT40 0x83       37       37
>       32 HT40 0x84       37       37
>       33 HT40 0x85       35       35
>       34 HT40 0x86       33       33
>       35 HT40 0x87       31       31
>       36 HT40 0x90       37       37
>       37 HT40 0x91       37       37
>       38 HT40 0x92       37       37
>       39 HT40 0x93       37       37
>       40 HT40 0x94       37       37
>       41 HT40 0x95       35       35
>       42 HT40 0x96       33       33
>       43 HT40 0x97       31       31
>       44 VHT20 0xc0       38       38
>       45 VHT20 0xc1       38       38
>       46 VHT20 0xc2       38       38
>       47 VHT20 0xc3       38       38
>       48 VHT20 0xc4       38       38
>       49 VHT20 0xc5       36       36
>       50 VHT20 0xc6       34       34
>       51 VHT20 0xc7       32       32
>       52 VHT20 0xc8       31       31
>       53 VHT20 0xc9       30       30
>       54 VHT20 0xd0       38       38
>       55 VHT20 0xd1       38       38
>       56 VHT20 0xd2       38       38
>       57 VHT20 0xd3       38       38
>       58 VHT20 0xd4       38       38
>       59 VHT20 0xd5       36       36
>       60 VHT20 0xd6       34       34
>       61 VHT20 0xd7       32       32
>       62 VHT20 0xd8       31       31
>       63 VHT20 0xd9       30       30
>       64 VHT40 0xc0       37       37
>       65 VHT40 0xc1       37       37
>       66 VHT40 0xc2       37       37
>       67 VHT40 0xc3       37       37
>       68 VHT40 0xc4       37       37
>       69 VHT40 0xc5       35       35
>       70 VHT40 0xc6       33       33
>       71 VHT40 0xc7       31       31
>       72 VHT40 0xc8       30       30
>       73 VHT40 0xc9       29       29
>       74 VHT40 0xd0       37       37
>       75 VHT40 0xd1       37       37
>       76 VHT40 0xd2       37       37
>       77 VHT40 0xd3       37       37
>       78 VHT40 0xd4       37       37
>       79 VHT40 0xd5       35       35
>       80 VHT40 0xd6       33       33
>       81 VHT40 0xd7       31       31
>       82 VHT40 0xd8       30       30
>       83 VHT40 0xd9       29       29
>       84 VHT80 0xc0       36       36
>       85 VHT80 0xc1       36       36
>       86 VHT80 0xc2       36       36
>       87 VHT80 0xc3       36       36
>       88 VHT80 0xc4       36       36
>       89 VHT80 0xc5       34       34
>       90 VHT80 0xc6       32       32
>       91 VHT80 0xc7       30       30
>       92 VHT80 0xc8       29       29
>       93 VHT80 0xc9       28       28
>       94 VHT80 0xd0       36       36
>       95 VHT80 0xd1       36       36
>       96 VHT80 0xd2       36       36
>       97 VHT80 0xd3       36       36
>       98 VHT80 0xd4       36       36
>       99 VHT80 0xd5       34       34
>      100 VHT80 0xd6       32       32
>      101 VHT80 0xd7       30       30
>      102 VHT80 0xd8       29       29
>      103 VHT80 0xd9       28       28
>      104 HTCUP 0x40       36       36
>      105 HTCUP 0x 0       36       36
>      106 HTCUP 0x40       36       36
>      107 HTCUP 0x 0       36       36
>      108 HTCUP 0x 0       36       36
>      109 HTCUP 0x7a       34       34
>      110 HTCUP 0x8a       32       32
>      111 HTCUP 0x a       30       30
>      112 HTCUP 0xee       27       27
>      113 HTCUP 0xa6       26       26
>      114 HTCUP 0x90       36       36
>      115 HTCUP 0x1d       36       36
>      116 HTCUP 0x80       36       36
>      117 HTCUP 0x41       36       36
>      118 HTCUP 0xd9       36       36
>      119 HTCUP 0x64       34       34
>      120 HTCUP 0xf9       32       32
>      121 HTCUP 0x 0       30       30
>      122 HTCUP 0x 0       27       27
>      123 HTCUP 0x 0       26       26
>      124 HTCUP 0x64        0        0
>      125 HTCUP 0x 0       37       37
>      126 HTCUP 0x31        0        0
>      127 HTCUP 0x 4       37       37
>      128 HTCUP 0x 0       38       38
> ***********************************
> TXBF not supported
> ***************************
> root@OpenWrt:/sys#
>
>
> Thanks
>
> On Mon, May 13, 2019 at 10:27 AM Ben Greear <greearb@candelatech.com> wrote:
> >
> > On 5/13/19 10:26 AM, Sam Samy wrote:
> > > hi Ben,
> > >
> > >> Hello, what firmware are you using (ath10k-ct, or QCA?)  If using -ct firmware,
> > >> please try QCA firmware and let me know if that fixes the problem.
> > >>
> > >    I tried both. Both have the same problem. I tried various versions
> > > of the both(-ct and QCA) firmware as well. All have the same problem.
> >
> > Probably it is a board-file and/or calibration data issue then.
> >
> > The debugfs 'ath10k/tpc_stats' file may show very low values?
> >
> > Thanks,
> > Ben
> >
> > >
> > > Thanks
> > >
> > > On Mon, May 13, 2019 at 10:00 AM Ben Greear <greearb@candelatech.com> wrote:
> > >>
> > >> On 5/13/19 9:56 AM, Sam Samy wrote:
> > >>>    Hi,
> > >>>    I installed master branch openwrt onto Asus MAP-AC2200 AP. It has tri
> > >>> band. Its based on IPQ4019 DK04 QCA reference platform. 2 radios
> > >>> (2Ghz/5Ghz) on AHB bus and one 5GHZ on PCIe bus. Its generally working
> > >>> fine except one problem in 5Ghz. On both the 5Ghz radios the RSSI is
> > >>> pretty low on any channel I put it in.  In one feet range I see -60dB
> > >>> RSSI, where as the stock firmware that came with the AP gives an RSSI
> > >>> of -36dB at one foot distance.The downstream transmit rates are MCS8/9
> > >>> for most part. The 2Ghz is working fine. Its using the cal data from
> > >>> the flash that came with the AP.
> > >>>
> > >>>    Can you please suggest anyway to debug this or improve the RSSI?
> > >>>
> > >>>    Thanks you!
> > >>>
> > >>
> > >> Hello, what firmware are you using (ath10k-ct, or QCA?)  If using -ct firmware,
> > >> please try QCA firmware and let me know if that fixes the problem.
> > >>
> > >> Thanks,
> > >> Ben
> > >>
> > >> --
> > >> Ben Greear <greearb@candelatech.com>
> > >> Candela Technologies Inc  http://www.candelatech.com
> > >>
> > >
> >
> >
> > --
> > Ben Greear <greearb@candelatech.com>
> > Candela Technologies Inc  http://www.candelatech.com
> >