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    SubjectRe: call/normal switch was Re: omap4-droid4: voice call support was
    * Tony Lindgren <tony@atomide.com> [180401 15:38]:
    > * Pavel Machek <pavel@ucw.cz> [180401 13:20]:
    > > On Sat 2018-03-31 16:43:14, Tony Lindgren wrote:
    > > > * Pavel Machek <pavel@ucw.cz> [180331 19:56]:
    > > > > On Sat 2018-03-31 21:46:16, Pavel Machek wrote:
    > > > > > On Sat 2018-03-31 21:19:39, Pavel Machek wrote:
    > > > > > > On Sat 2018-03-31 11:19:35, Tony Lindgren wrote:
    > > > > > > > Cool :) Microphone still does not work for me.. I tried tweaking
    > > > > > > > the alsamixer settings but no mic. This is with cold boot with
    > > > > > > > droid4-kexecboot if that might make a difference, we may have
    > > > > > > > some register uninitialized somewhere. Any ideas?
    > > > > > >
    > > > > > > Ok, I was focusing on the speaker side.
    > > > > > >
    > > > > > > alsamixer, tab to go to capture settings, set it to 37 37 Mic2 Mic1
    > > > > > > should work, according to my notes, but not recently tested and not
    > > > > > > tested against real human.
    > > > > > >
    > > > > > > I'll attempt to test it, but something in my userland shuts down
    > > > > > > system just after boot 60% of time, which is rather annoying.
    > > > > >
    > > > > > Hmm. So I tried again, and setting Mic1 and back in the capture
    > > > > > settings crashed the modem. Bang, disconnected from the USB.
    > > > >
    > > > > Next try, and it worked this time.
    > > > >
    > > > > _Before the call_, set mode to Normal and then Call. Then go to
    > > > > capture, and set 100 100 Mic2 Mic1. Then place a call,
    > > > >
    > > > > AT+CFUN=1
    > > > > OK
    > > > > ATD6;
    > > >
    > > > No luck with microphone here :( Using ttyUSB4, AT+CFUN=1
    > > > works, but ATD command on it just hangs the USB interface
    > > > and I have to reload phy-mapphone-mdm6600 to reset the
    > > > modem.
    > >
    > > Test call with real human worked (thanks to Rolf K.), I could hear him
    > > well but he reported call was very quiet. And that was with capture
    > > settings at 100%.
    >
    > Maybe the volume also needs to be controlled at mdm6600 end.
    > I'm seeing some AT+CLVL=n with n being between [0-7] calls on
    > DLCI2 in my Android logcat logs.
    >
    > > If you had a register dump from android with mics working, preferably
    > > not in speaker mode, perhaps I could try to figure it out?
    >
    > OK here are four diffs against starting the phone app for regular
    > call, speaker call, and muted versions of them:
    >
    > http://muru.com/linux/d4/cpcap/
    >
    > Also, I'm connected over cdma right now, not 3g, but I doubt
    > that makes a difference for the microphone.

    Found it! Here's what I need to do over n_gsm:

    ngsm 1 "AT+CFUN=1"
    ngsm 1 "AT+CFUN?"
    ngsm 2 "AT+EACC=3,0" # enable mic
    ngsm 2 "AT+CLVL=4" # set speaker volume
    ngsm 2 "AT+CMUT=0" # unmute mic
    ngsm 1 "ATD${number}"
    ngsm 1 "AT+CLCC" # list current calls
    ngsm 2 "AT+NREC=1" # enable noise cancellation
    ngsm 1 "AT+SCRN=0" # ??? not sure if this does anything

    while [ 1 ]; do
    date
    ngsm 1 "AT+CLCC"
    sleep 10
    done

    So speaker phone call works just fine, I just tested with a
    human at the other end :)

    Hmm let's hope all those also translate to some qmi calls.

    Regards,

    Tony

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