Re: RTL8723BS driver doesn't work for,me but I can help testing

From: Tobias Baumann
Date: Sun May 17 2020 - 17:10:54 EST

hi martin

sorry for cc -problem it was my fault in thunderbird

thanks for dtb file but this file has problem kernel stop with

[ÂÂÂ 6.122092] mmc0: new high speed SDIO card at address 0001
[ÂÂ 35.804258] VCCK: disabling
[ÂÂ 35.808781] platform pwmleds: deferred probe pending
[ÂÂ 35.812625] platform sound: deferred probe pending

[Â 215.804295] random: crng init done

(last time deferred probe was gcc problem )

please can you provide me with dts file and i complile at my linux box or maybe only the change line and i use the dtb from image and edit the lines like the usb patch

thanks

Tobias

Am 17.05.2020 um 22:28 schrieb Martin Blumenstingl:
Hi Tobias,

(adding back the original Cc list since that got lost at some point.
please keep them included)

On Sun, May 17, 2020 at 9:57 PM Tobias Baumann <017623705678@xxxxxxxxxxx> wrote:
hi Martin


i know what you mean with many modules from Arduino sensor modules not
all datasheet are correct

ok i got into uboot env

i could not get GPIOA0 write because of unknowm pin number
GPIOAO_0 should work though (the underscore is important)

but GPIOX works

now my measurmant show that out high = signal high (3.3V) and out low
=singnal low (0.0V)

without any instruction the S812 pins show something betwen 0.2V and 0.8v

and that GPIOX_11 (old gpio-123 ; new gpio-402) the one to PIN12
WLAN-DIS of r8723bs modul

and like you saw on my kernel cat print it is set to low
I have updated the GPIOs polarity of GPIOAO_6 and GPIOX_11 (since both
are showing inverse polarity compared to the Android kernel).
since I don't know if you build mainline yourself or if you use builds
from other people: I attached the updated .dtb so you can use that if
you want to

Please let me know if that fixes wifi for you.


thanks for you uboot gset instruction thats helps

Am 17.05.2020 um 20:09 schrieb Martin Blumenstingl:
Hi Tobias,

On Sun, May 17, 2020 at 8:53 AM Tobias Baumann <017623705678@xxxxxxxxxxx> wrote:
hi Martin


yes i mean rtw_antsel=1 or rtw_ansel=2 with cold start

i got hands on pine64 rtl8723bs pdf file with datasheet i attached it there i found the pinout and found a hint that maybe help !!!
it *may* help. beware that there are *many* RTL8723BS modules out
there, which may or may not follow the same pattern.

Realtek only sells the RTL8723BS chip on it's own. But it needs some
extra components (crystals, resistors, capacitors, ...)
When changing some of these components you need to certify (FCC / CE /
some other regulatory) the wifi card again (to ensure it follows the
specification and does not interfere with other devices).
Thus there are manufacturers (for example FN-LINK) that sell certified
RTL8723BS modules.

Also one datasheet can describe the signal as "active low".
However, if there is a small transistor circuit on the module PCB (or
the main SoC PCB) then that can "flip" the signal, meaning: the SoC
outputs HIGH but the module gets LOW - or vice versa.
Thus we describe the GPIOs from the GPIO controller (in this case:
Amlogic SoC) perspective.

GPIOs 0-135:(from 3.10.99 Kernel )
gpio-3 (gpio_key ) in hi
gpio-6 (sdio_wifi ) out hi ->
this one is GPIOAO_6 and called "gpio-382" in your 5.7 kernel GPIO dump

gpio-14 (amlsd ) in lo
gpio-15 (DWC_OTG ) out hi
gpio-64 (amlsd ) in lo
gpio-122 (sdio_wifi ) out hi
this one is GPIOX_10. I don't know why the vendor kernel requests this as GPIO
because actually it is using the xtal_32k_out mux on the pin controller.
I assume this is what you have for pin24 below (32k/RTC clock/WLAN
clock), because it's output is 32.768kHz (or rounded: 32kHz)

gpio-123 (sdio_wifi ) out hi
this one is GPIOX_11 and called "gpio-402" in your 5.7 kernel GPIO dump

gpio-132 (bt_rfkill ) out hi -> pin 34 Bt_dis (Bluetooth disable)
this one is GPIOX_20 and not part of your 5.7 kernel GPIO dump
Linux 5.8 will gain RTL8723BS Bluetooth support -> with that the GPIO
will show up as well

do you know if this is related to the wifi part somehow?

gpio-133 (sdio_wifi ) in hi
this one is GPIOX_21 and not part of your 5.7 kernel GPIO dump either.
It is the "wifi host wake" and should not be related to your issue.
the SDIO wifi card uses it to let the host know that data is available
and the host should resume from suspend.

[...]
GPIO Kernel 5.7

gpiochip1: GPIOs 376-390, parent: platform/c8100084.pinctrl, ao-bank:
gpio-382 ( |reset ) out lo

gpiochip0: GPIOs 391-511, parent: platform/c1109880.pinctrl, cbus-banks:
gpio-402 ( |reset ) out lo
gpio-484 ( |snps,reset ) out hi ACTIVE LOW
you can ignore gpio-484 (snps,reset) for the current issue.
This is for the Ethernet PHY and has nothing to do with wifi.

gpio-491 ( |cd ) in lo ACTIVE LOW


i think i do not have a pull down gpio pin i need the pins high state
which one do you mean exactly?

since you are measuring with a multimeter anyways: can you please find
out the pin from the Amlogic SoC which is routed to the WLAN_DIS pin
of the WIFI module along with the polarity (high/low)?
in Amlogic's vendor u-boot you can use:
gset GPIO_NAME out high/low
for example:
gset GPIOX_11 out low


Best regards,
Martin

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Best regards,
Martin

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Diese E-Mail wurde von AVG auf Viren geprÃft.
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