5G wifi doesn't really work on my tp-link Archer C7 v2
e9hack
e9hack at gmail.com
Sun May 22 00:59:27 PDT 2022
Hi,
I found the reason, why the ath10k driver isn't initialized properly after reboot with backports 5.15.33-1. It is related to regulatory domain settings. If I add the following code from backports 5.15.8-1
diff -upr a/drivers/net/wireless/ath/regd.c b/drivers/net/wireless/ath/regd.c
--- a/drivers/net/wireless/ath/regd.c 1970-01-01 01:00:00.000000000 +0100
+++ b/drivers/net/wireless/ath/regd.c 1970-01-01 01:00:00.000000000 +0100
@@ -667,14 +667,14 @@ ath_regd_init_wiphy(struct ath_regulator
/*
* Some users have reported their EEPROM programmed with
- * 0x8000 set, this is not a supported regulatory domain
- * but since we have more than one user with it we need
- * a solution for them. We default to 0x64, which is the
- * default Atheros world regulatory domain.
+ * 0x8000 or 0x0 set, this is not a supported regulatory
+ * domain but since we have more than one user with it we
+ * need a solution for them. We default to 0x64, which is
+ * the default Atheros world regulatory domain.
*/
static void ath_regd_sanitize(struct ath_regulatory *reg)
{
- if (reg->current_rd != COUNTRY_ERD_FLAG)
+ if (reg->current_rd != COUNTRY_ERD_FLAG && reg->current_rd != 0)
return;
printk(KERN_DEBUG "ath: EEPROM regdomain sanitized\n");
reg->current_rd = 0x64;
the driver does start after reboot.
I think, this a dirty fix only and something in the regulatory domain code is wrong, since the ath9k driver doesn't have this problem.
Regards,
Hartmut
Am 19.05.2022 um 15:04 schrieb e9hack:
> Am 19.05.2022 um 14:07 schrieb Hauke Mehrtens:
>> On 5/16/22 15:54, e9hack wrote:
>>> Hi,
>>>
>>> I've trouble with the following commit:
>>>
>>> commit 3aa96efa24c13c6e0aafa5ad826f3f95a3bd74f9
>>> mac80211: Update to version 5.15.33-1
>>>
>>> After this commit the 5G wifi interface doesn't start properly. The interfaces are visible with ifconfig, but it isn't visible on air. To get 5G working, I must restart hostapd. I'm doing this with the following command 'wifi down; sleep 5; killall -9 hostapd; sleep 5; wifi &'.
>>>
>>> Any idea, what is wrong in mac80211 5.15.33-1?
>>>
>>> Regards,
>>> Hartmut
>>>
>>
>> Hi Hartmut,
>>
>> Do you have some more details?
> Not yet.
>
>> Do you see any error message in logread?
> No. It looks similar. In both versions (5.15.8-1 and 5.15.33-1), driver and firmware
> are load and hostapd does setup the interfaces. The only difference is the first
> output related to country variants from EEPROM, but I think this printed text only.
> It is different for ath9k and ath10k.
>
> old:
> Sun May 15 16:37:43 2022 kern.info kernel: [ 29.082747] ath10k_pci 0000:00:00.0: enabling device (0000 -> 0002)
> Sun May 15 16:37:43 2022 kern.info kernel: [ 29.091400] ath10k_pci 0000:00:00.0: pci irq legacy oper_irq_mode 1 irq_mode 0 reset_mode 0
> Sun May 15 16:37:43 2022 kern.info kernel: [ 31.686602] EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: errors=remount-ro
> Sun May 15 16:37:43 2022 kern.info kernel: [ 34.664574] ath10k_pci 0000:00:00.0: qca988x hw2.0 target 0x4100016c chip_id 0x043202ff sub 0000:0000
> Sun May 15 16:37:43 2022 kern.info kernel: [ 34.673993] ath10k_pci 0000:00:00.0: kconfig debug 0 debugfs 1 tracing 0 dfs 1 testmode 0
> Sun May 15 16:37:43 2022 kern.info kernel: [ 34.687040] ath10k_pci 0000:00:00.0: firmware ver 10.2.4-1.0-00047 api 5 features no-p2p,raw-mode,mfp,allows-mesh-bcast crc32 35bd9258
> Sun May 15 16:37:43 2022 kern.info kernel: [ 35.199254] ath10k_pci 0000:00:00.0: board_file api 1 bmi_id N/A crc32 bebc7c08
> Sun May 15 16:37:43 2022 kern.warn kernel: [ 35.226156] (backports-5.15.8-1/drivers/net/wireless/ath/ath10k/core.c:2213) Found a calibration nvmem-cell
> Sun May 15 16:37:43 2022 kern.info kernel: [ 36.420550] ath10k_pci 0000:00:00.0: htt-ver 2.1 wmi-op 5 htt-op 2 cal nvmem max-sta 128 raw 0 hwcrypto 1
> Sun May 15 16:37:43 2022 kern.debug kernel: [ 36.564054] ath: EEPROM regdomain sanitized
> Sun May 15 16:37:43 2022 kern.debug kernel: [ 36.564066] ath: EEPROM regdomain: 0x64
> Sun May 15 16:37:43 2022 kern.debug kernel: [ 36.564071] ath: EEPROM indicates we should expect a direct regpair map
> Sun May 15 16:37:43 2022 kern.debug kernel: [ 36.564090] ath: Country alpha2 being used: 00
> Sun May 15 16:37:43 2022 kern.debug kernel: [ 36.564095] ath: Regpair used: 0x64
> Sun May 15 16:37:43 2022 kern.warn kernel: [ 36.640956] (backports-5.15.8-1/drivers/net/wireless/ath/ath9k/init.c:695) ath9k_of_init()
> Sun May 15 16:37:43 2022 kern.warn kernel: [ 36.650798] (backports-5.15.8-1/drivers/net/wireless/ath/ath9k/init.c:608) Found a calibration nvmem-cell.
> Sun May 15 16:37:43 2022 kern.warn kernel: [ 36.670784] (backports-5.15.8-1/drivers/net/wireless/ath/ath9k/init.c:615) Size of calibration nvmem-cell is 1088 bytes and crc is 0f7c.
> Sun May 15 16:37:43 2022 kern.debug kernel: [ 36.687430] ath: EEPROM regdomain sanitized
> Sun May 15 16:37:43 2022 kern.debug kernel: [ 36.699887] ath: EEPROM regdomain: 0x64
> Sun May 15 16:37:43 2022 kern.debug kernel: [ 36.699893] ath: EEPROM indicates we should expect a direct regpair map
> Sun May 15 16:37:43 2022 kern.debug kernel: [ 36.699913] ath: Country alpha2 being used: 00
> Sun May 15 16:37:43 2022 kern.debug kernel: [ 36.699918] ath: Regpair used: 0x64
> Sun May 15 16:37:43 2022 kern.debug kernel: [ 36.716823] ieee80211 phy1: Selected rate control algorithm 'minstrel_ht'
> Sun May 15 16:37:43 2022 kern.info kernel: [ 36.718638] ieee80211 phy1: Atheros AR9550 Rev:0 mem=0xb8100000, irq=12
>
> new:
> Sat May 14 11:09:05 2022 kern.info kernel: [ 29.384532] ath10k_pci 0000:00:00.0: enabling device (0000 -> 0002)
> Sat May 14 11:09:05 2022 kern.info kernel: [ 29.393189] ath10k_pci 0000:00:00.0: pci irq legacy oper_irq_mode 1 irq_mode 0 reset_mode 0
> Sat May 14 11:09:05 2022 kern.info kernel: [ 31.920332] EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: errors=remount-ro
> Sat May 14 11:09:05 2022 kern.info kernel: [ 35.264855] ath10k_pci 0000:00:00.0: qca988x hw2.0 target 0x4100016c chip_id 0x043202ff sub 0000:0000
> Sat May 14 11:09:05 2022 kern.info kernel: [ 35.274269] ath10k_pci 0000:00:00.0: kconfig debug 0 debugfs 1 tracing 0 dfs 1 testmode 0
> Sat May 14 11:09:05 2022 kern.info kernel: [ 35.287315] ath10k_pci 0000:00:00.0: firmware ver 10.2.4-1.0-00047 api 5 features no-p2p,raw-mode,mfp,allows-mesh-bcast crc32 35bd9258
> Sat May 14 11:09:05 2022 kern.info kernel: [ 35.945834] ath10k_pci 0000:00:00.0: board_file api 1 bmi_id N/A crc32 bebc7c08
> Sat May 14 11:09:05 2022 kern.warn kernel: [ 35.973350] (backports-5.15.33-1/drivers/net/wireless/ath/ath10k/core.c:2230) Found a calibration nvmem-cell
> Sat May 14 11:09:05 2022 kern.info kernel: [ 37.248472] ath10k_pci 0000:00:00.0: htt-ver 2.1 wmi-op 5 htt-op 2 cal nvmem max-sta 128 raw 0 hwcrypto 1
> Sat May 14 11:09:05 2022 kern.debug kernel: [ 37.394052] ath: EEPROM regdomain: 0x0
> Sat May 14 11:09:05 2022 kern.debug kernel: [ 37.394061] ath: EEPROM indicates default country code should be used
> Sat May 14 11:09:05 2022 kern.debug kernel: [ 37.394066] ath: doing EEPROM country->regdmn map search
> Sat May 14 11:09:05 2022 kern.debug kernel: [ 37.394080] ath: country maps to regdmn code: 0x3a
> Sat May 14 11:09:05 2022 kern.debug kernel: [ 37.394086] ath: Country alpha2 being used: US
> Sat May 14 11:09:05 2022 kern.debug kernel: [ 37.394091] ath: Regpair used: 0x3a
> Sat May 14 11:09:05 2022 kern.warn kernel: [ 37.481401] (backports-5.15.33-1/drivers/net/wireless/ath/ath9k/init.c:695) ath9k_of_init()
> Sat May 14 11:09:05 2022 kern.warn kernel: [ 37.481535] (backports-5.15.33-1/drivers/net/wireless/ath/ath9k/init.c:608) Found a calibration nvmem-cell.
> Sat May 14 11:09:05 2022 kern.warn kernel: [ 37.500764] (backports-5.15.33-1/drivers/net/wireless/ath/ath9k/init.c:615) Size of calibration nvmem-cell is 1088 bytes and crc is 0f7c.
> Sat May 14 11:09:05 2022 kern.debug kernel: [ 37.517525] ath: EEPROM regdomain: 0x0
> Sat May 14 11:09:05 2022 kern.debug kernel: [ 37.530064] ath: EEPROM indicates default country code should be used
> Sat May 14 11:09:05 2022 kern.debug kernel: [ 37.530069] ath: doing EEPROM country->regdmn map search
> Sat May 14 11:09:05 2022 kern.debug kernel: [ 37.530083] ath: country maps to regdmn code: 0x3a
> Sat May 14 11:09:05 2022 kern.debug kernel: [ 37.530089] ath: Country alpha2 being used: US
> Sat May 14 11:09:05 2022 kern.debug kernel: [ 37.530094] ath: Regpair used: 0x3a
> Sat May 14 11:09:05 2022 kern.debug kernel: [ 37.546975] ieee80211 phy1: Selected rate control algorithm 'minstrel_ht'
> Sat May 14 11:09:05 2022 kern.info kernel: [ 37.548814] ieee80211 phy1: Atheros AR9550 Rev:0 mem=0xb8100000, irq=12
>
> The nvmem-cell stuff is from me, because I did change, how the calibration data
> is load for the ath9k at a tp-link wdr3600. This router doesn't have an issue.
> The affected router is the tp-link archer C7 v2. I'm using the kmod-ath10k
> driver and not kmod-ath10k-ct.
>
>> What hardware was this happening on?
> Router is a tp-link archer C7 v2. Firmware for ath10k is qca988x.
>
>>
>> Did it work again when you reverted the linked commit?
> If I revert this commit only, backports-5.15.8-1 does work with further commits too.
>
> Regards,
> Hartmut
>
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