After consultation with Florian, I'd rather wait and see. But if you want you can also test radio apps for FM that I have created. But I won't continue there because I didn't have any success or I don't have the knowledge. I'll just put you all here in the forum. If not, I'll delete the apps again.

Please write your feedback as a comment to https://gitlab.com/ubports/core/fm-radio-service/-/merge_requests/4

@mardy Found it. It's called vendor.qcom.bluetooth.soc on my device.

phablet@ubuntu-phablet:~$ getprop|grep cherokee
[vendor.qcom.bluetooth.soc]: [cherokee]

OK, I'll update the service to check that property too.

phablet@ubuntu-phablet:~$ getprop|grep cherokee
[vendor.qcom.bluetooth.soc]: [cherokee]

Hey @mardy, I modified the vendor partition like on Redmi Note 9 Pro for my Poco X3 NFC, which I ported myself and noticed that the FM radio only works after setting vendor.bluetooth.soc to cherokee (It's empty on my device) manually. I could create an overlay for my port which sets that property, but I don't know if it's the best idea or is there something wrong with the FM service?

Wow, good work!! The fm-radio service explicitly checks for that property to be set to cherokee, but that's just because I saw that the qualcomm FM radio app does the same. You could try to run a getprop on the device and see if there's some other property which can be used to identify the bluetooth/radio chipset, and then I could add it to the fm-radio-service. Or, indeed, setting that property in the vendor partition would be a solution.

@mardy I have the Redmi Note 9 Pro since yesterday. Since I have to go back from Android 11 to Android 10 anyway, I will download this global version V12.0.3.0.QJZMIXM. Everything else that has to do with the radio I will do at a later date. I tried to get the Redmi Note 7 Pro but no chance.

The Redmi Note 9 Pro works as well, but you need to get a couple of binaries into your vendor partition. I created a script to do it, but it's for advanced users only

https://gitlab.com/mardy/xiaomi-miatoll/-/tree/fm-radio/tools

@mardy
Wow! FM radio on Ubports would be a dream!

It is for sure not one of the priority devices but could fm radio potentially also work on the S3Neo?
zcat /proc/config.gz | grep -n RADIO_IRIS gives:

2587:CONFIG_RADIO_IRIS=y
2588:CONFIG_RADIO_IRIS_TRANSPORT=y

https://forums.ubports.com/topic/3652/call-for-testing-samsung-s3-neo-s3ve3g-owners/91

Nice! Please follow the instructions from the comment just above this one

What should be the next for the Xperia X?

The syslog (/var/log/syslog) captured while trying the FM radio would be helpful

Edit: ah, sorry, now I see, that this device exposes with the /dev/radio0 device. That's currently not supported, but I'm working on that too.
Can you please download the fmbin program from here (for 64bit devices) or here (for 32 bit devices), then copy it to the device, make it executable, and run it?

Once it starts, type:

init
enable

and paste here the syslog.

It is for sure not one of the priority devices but could fm radio potentially also work on the S3Neo?
zcat /proc/config.gz | grep -n RADIO_IRIS gives:

2587:CONFIG_RADIO_IRIS=y
2588:CONFIG_RADIO_IRIS_TRANSPORT=y

https://forums.ubports.com/topic/3652/call-for-testing-samsung-s3-neo-s3ve3g-owners/91

Enabling my device, the Xperia X -- First:

phablet@ubuntu-phablet:~$ sudo ls -l /dev/fm* /dev/radio*
[sudo] password for phablet:
ls: cannot access '/dev/fm*': No such file or directory
crw-rw----+ 1 system system 81, 18 Oct 27 1971 /dev/radio0

Second: Install the .debs (fm-radio-service; fm-radio-tools). No problem!

Third, Start the command-line client:
phablet@ubuntu-phablet:~$ fm-radio-client.py

1. Quit
2. Open tuner
   Choose an action: 2

That is the result:
Traceback (most recent call last):
File "/usr/bin/fm-radio-client.py", line 226, in pick_action
command.action()
File "/usr/bin/fm-radio-client.py", line 156, in open_tuner
tuner_path = service.open_tuner()
File "/usr/bin/fm-radio-client.py", line 26, in open_tuner
return self.__service.OpenTuner()
File "/usr/lib/python3/dist-packages/dbus/proxies.py", line 70, in call
return self._proxy_method(*args, **keywords)
File "/usr/lib/python3/dist-packages/dbus/proxies.py", line 145, in call
**keywords)
File "/usr/lib/python3/dist-packages/dbus/connection.py", line 651, in call_blocking
message, timeout)
dbus.exceptions.DBusException: com.lomiri.FMRadioService.Error.ResourceError: Radio backend not available

Seems to be similar to the output from BQ U Plus, isn´t it?
(I´m not a porter or expert, only a user - but really like fm on my phone and missing that in UT.)

So, thank u for your work!

@mardy The output of command:

phablet@ubuntu-phablet:~$ sudo ls -l /dev/fm* /dev/radio*
ls: cannot access '/dev/fm*': No such file or directory
crw-rw----+ 1 system system 81, 18 Apr 14  1971 /dev/radio0
phablet@ubuntu-phablet:~$ 

This looks promising! But you will have to play with the udev rules to change the group of the file to android_media, otherwise the phablet user will not be able to open the device.

But...

I am not one of those people so I won't be testing this on my BQ E5 HD

Sorry! :flushed_face:

phablet@ubuntu-phablet:~$ sudo ls -l /dev/fm* /dev/radio*
ls: cannot access '/dev/fm*': No such file or directory
crw-rw----+ 1 system system 81, 18 Apr 14  1971 /dev/radio0
phablet@ubuntu-phablet:~$ 

Btw:

phablet@ubuntu-phablet:~$ sudo zless /proc/config.gz | grep -iE 'V4L2'
CONFIG_VIDEO_V4L2_SUBDEV_API=y
CONFIG_VIDEO_V4L2=y
CONFIG_MSM_VIDC_V4L2=y
CONFIG_MSM_V4L2_VIDEO_OVERLAY_DEVICE=y
# CONFIG_MSM_BA_V4L2 is not set
phablet@ubuntu-phablet:~$

@mardy I tried on my BQ U Plus (I'm the official porter, even though the device is not officially in the list).

Thanks for trying!

CONFIG_RADIO_IRIS is the module, but it seems to have some issue.
The rootfs.img I actually use is a stable one with some months old. Might it be useful to test with more recent version of edge one for armh?

No, a newer rootfs would not help. The service backend does not implement support for the Iris module, but I can try to add it, since it should be exposed as a standard V4L2 device. What does the following command say?

ls -l /dev/fm* /dev/radio*

phablet@ubuntu-phablet:~$ fm-radio-client.py 
1) Quit
2) Open tuner
Choose an action: 2
Traceback (most recent call last):
  File "/usr/bin/fm-radio-client.py", line 226, in pick_action
    command.action()
  File "/usr/bin/fm-radio-client.py", line 156, in open_tuner
    tuner_path = service.open_tuner()
  File "/usr/bin/fm-radio-client.py", line 26, in open_tuner
    return self.__service.OpenTuner()
  File "/usr/lib/python3/dist-packages/dbus/proxies.py", line 70, in __call__
    return self._proxy_method(*args, **keywords)
  File "/usr/lib/python3/dist-packages/dbus/proxies.py", line 145, in __call__
    **keywords)
  File "/usr/lib/python3/dist-packages/dbus/connection.py", line 651, in call_blocking
    message, timeout)
dbus.exceptions.DBusException: com.lomiri.FMRadioService.Error.ResourceError: Radio backend not available

I checked what CONFIGs are enabled in the kernel:

phablet@ubuntu-phablet:~$ sudo zless /proc/config.gz | grep -iE 'RADIO|FM'
CONFIG_BINFMT_ELF=y
CONFIG_BINFMT_SCRIPT=y
# CONFIG_BINFMT_MISC is not set
# CONFIG_HAMRADIO is not set
# CONFIG_BTFM_SLIM is not set
# CONFIG_BRCMFMAC is not set
CONFIG_MEDIA_RADIO_SUPPORT=y
CONFIG_RADIO_ADAPTERS=y
# CONFIG_RADIO_SI470X is not set
# CONFIG_RADIO_SI4713 is not set
# CONFIG_RADIO_SHARK is not set
# CONFIG_RADIO_SHARK2 is not set
# CONFIG_RADIO_TEA5764 is not set
# CONFIG_RADIO_SAA7706H is not set
# CONFIG_RADIO_TEF6862 is not set
# CONFIG_RADIO_WL1273 is not set
# Texas Instruments WL128x FM driver (ST based)
# CONFIG_RADIO_WL128X is not set
CONFIG_RADIO_IRIS=y
CONFIG_RADIO_IRIS_TRANSPORT=y
CONFIG_RADIO_SILABS=y
CONFIG_MMC_SDHCI_PLTFM=y
# CONFIG_RTC_DRV_FM3130 is not set
# CONFIG_FMC is not set
# CONFIG_QFMT_V1 is not set
# CONFIG_QFMT_V2 is not set
phablet@ubuntu-phablet:~$

CONFIG_RADIO_IRIS is the module, but it seems to have some issue.
The rootfs.img I actually use is a stable one with some months old. Might it be useful to test with more recent version of edge one for armh?
Btw, the installation of the 3 debs went fine.