Hello.
On Thu, 2011-02-10 at 09:35 +0000, ext Bensaid, Selma wrote:
On Tue, 2011-02-08 at 13:02 +0200, Peter Ujfalusi wrote:
For both configuration we have a set of HCI commands to configure the FM
audio
path and one of my concerns is to know if the wl1273_codec should handle
the audio path configuration
and the switch between FM and BT SCO?
It would be better if the codec could handle the configuration, depending on which DAI is in use. If we can send HCI commands from kernel, I think that would be the cleanest way.
Yes, I would have done just that - and we talked a lot about it locally
- if I had known how to do it. I started to work on it and also talked
to some BT people but it didn't seem feasible at the time. Advice welcome of course...
Cheers, Matti
Hi, Below the set of HCI commands that we have identified to configure the FM and BT SCO audio paths:
External Audio Connection o START BT SCO Connection # BT audio Path PCM & FM audio Path I2S
hcitool cmd 0x3F 0X195 FF FF FF FF FF FF FF FF 01 02 FF 00 00 00 00
# BT AUDIO Codec Configuration: MASTER
hcitool cmd 0x3F 0X106 00 03 00 40 1F 00 00 01 00 00 00 00 10 00 02 00 00 10 00 02 00 01 00 00 00 00 00 00 00 00 00 00
o STOP BT SCO Connection # BT AUDIO Codec Configuration: SLAVE
hcitool cmd 0x3F 0X106 00 03 01 40 1F 00 00 01 00 00 00 00 10 00 02 00 00 10 00 02 00 01 00 00 00 00 00 00 00 00 00 00
Internal Audio Connection o START BT SCO Connection # BT audio Path PCM # FM audio Path None
hcitool cmd 0x3F 0X195 FF FF FF FF FF FF FF FF 01 00 FF 00 00 00 00
# BT AUDIO Codec Configuration: MASTER
hcitool cmd 0x3F 0X106 00 03 00 40 1F 00 00 01 00 00 00 00 10 00 02 00 00 10 00 02 00 01 00 00 00 00 00 00 00 00 00 00
o STOP BT SCO Connection # BT audio Path None & FM audio Path None
hcitool cmd 0x3F 0X195 FF FF FF FF FF FF FF FF 00 00 FF 00 00 00 00
o FM Audio Path configuration # BT audio Path None & FM audio Path PCM
hcitool cmd 0x3F 0X195 FF FF FF FF FF FF FF FF 00 01 FF 00 00 00 00
Please note that the BT SCO Codec settings are platform specific. Selma.
We know these messages, they are mentioned in the documentation and we use them already, but we send them from the user space. The problem is how to send the messages from the driver within the kernel.
Thanks, Matti
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