Audio calls work fine in WP7610 but no audio is heard on WP7609

Legato Application Framework
1

Hi All,

I’ve been working with the WP7609 and WP7610 modems specifically around voice calls. I’ve successfully tested voice call functionality on the WP7610, however, when I attempt to use the same code with the WP7609 no audio is heard in the phone call. When I check the device log, I see the following error messages:

Oct 23 18:37:52 swi-mdm9x28-wp user.info Legato: INFO | VoiceManagerExe[886]/VoiceManager T=main | debug.cpp Log() 37 | VoiceManager: Call: INCOMING from +1xxxxxxxxxx
Oct 23 18:37:52 swi-mdm9x28-wp user.warn Legato: -WRN- | modemDaemon[892]/le_pa T=main | pa_sim_qmi.c MapSimState() 1009 | More than one application 2
Oct 23 18:37:52 swi-mdm9x28-wp user.info Legato: INFO | MainApp[880]/modem_access T=main | debug.cpp Log() 37 | Main: Answering incoming voice call.
Oct 23 18:37:52 swi-mdm9x28-wp user.warn Legato: -WRN- | audioDaemon[855]/le_pa_audio T=unknown | pa_audio.c CallHandler() 375 | CallHandler called
Oct 23 18:37:52 swi-mdm9x28-wp user.warn Legato: -WRN- | audioDaemon[855]/le_pa_audio T=unknown | pa_audio.c CallHandler() 427 | Identify call ID 1
Oct 23 18:37:52 swi-mdm9x28-wp user.info Legato: INFO | modemDaemon[892]/le_pa T=unknown | pa_mcc_qmi.c CallHandler() 689 | QMI ID.1 State.CONVERSATION (0x03) Type.0x00 Dir.0x02 Mode.0x03 Mparty.0 ALS.0
Oct 23 18:37:52 swi-mdm9x28-wp user.info Legato: INFO | VoiceManagerExe[886]/VoiceManager T=main | debug.cpp Log() 37 | VoiceManager: Call: CONNECTED from +1xxxxxxxxxx
[ 95.472346] Circuit-Switch Voice: ASoC: no backend DAIs enabled for Circuit-Switch Voice
[ 95.492671] voc_end_voice_call: Error: End voice called in state 0
[ 95.513708] Circuit-Switch Voice: ASoC: no backend DAIs enabled for Circuit-Switch Voice
[ 95.521455] voc_end_voice_call: Error: End voice called in state 0
Oct 23 18:37:53 swi-mdm9x28-wp user.err kernel: [ 95.472346] Circuit-Switch Voice: ASoC: no backend DAIs enabled for Circuit-Switch Voice**
Oct 23 18:37:53 swi-mdm9x28-wp user.err kernel: [ 95.492671] voc_end_voice_call: Error: End voice called in state 0
Oct 23 18:37:53 swi-mdm9x28-wp user.err kernel: [ 95.513708] Circuit-Switch Voice: ASoC: no backend DAIs enabled for Circuit-Switch Voice
Oct 23 18:37:53 swi-mdm9x28-wp user.err kernel: [ 95.521455] voc_end_voice_call: Error: End voice called in state 0

This looks like the WP76xx modem binary driver is throwing kernel errors, but I have no idea what they actually mean. We are seeing this on UMTS/HSPA only while in North America, however, we are seeing similar symptoms in Australia. Any help would be appreciated.

Thanks,
Chris

2

Are you testing the latest FW R16?

3

No. We are using 13.3 for the WP7609, and 13.2 for the WP7610.

4

is it possible to give a try on latest FW?

5

I don’t see an R16 release for the WP7609…

R16 (Generic — GCF & PTCRB) — WP7601, WP7603, WP7607, WP7610, WP7611
R16 (AT&T — PTCRB) — WP7603, WP7610, WP7611
R16 (Sierra Wireless — GCF) — WP7603, WP7607, WP7610, WP7611
R16 (Sprint — GCF) — WP7611
R16 (T-Mobile — PTCRB) — WP7611
R16 (Verizon — GCF) — WP7601, WP7610, WP7611

6

can the generic GCF register on your network?

7

After updating the modem to R16, I was able to successfully make an audio connection on the device. However, I’m a little concerned that the Firmware isn’t listed as supported for the WP7609. And though it works here, it may not work for our customers in Australia who are using WP7609.

8

hi
R16 is under certification for GCF on WP7609, and should be available soon.

9

Hi,

It seems that R16 is still not certified for GCF on WP7609. May I ask when it will be certified?

10

I think it will be in R16.1 later

11

Thank you for the reply. By “later” do you mean later this year?

12

yes, i think so.
BTW, did you contact your distributor?

13

Yes and I was told there are no expected updates for WP76xx modules this quarter. I thought I would respond on this forum thread, though, as the WP7609 support for R16 “should be available soon” according to @plu 's comment in November 2020, so was unsure if WP7609 support for R16 had already been released

14

I have faced a silent audio issue, please see: