[alsa-devel] : Question ASoC driver without Codec driver?

Peter Ujfalusi peter.ujfalusi at nokia.com
Thu Feb 24 08:39:54 CET 2011


On 02/23/11 11:29, ext Bensaid, Selma wrote:
> Hi,
> I'm trying to find out if it's possible to implement an ASoC driver 
> without a codec driver.
> I'm implementing a ASoC driver for BT/FM WL1273,

Well, probably you did noticed, that we already have driver for the
WL1273 in upstream... As I recall you have sent several mails regarding
to writing a new codec driver for the same chip.

> where the FM WL1273 control 
> interface is based on V4L2 since since we use the Combined Interface 
> Mode (The host controls both the BT and the FM Radio through the BT HCI host interface).

It is true, that the current implementation relies on i2c interface, but..
AFAIK TI has the combined interface mode for this chip in the staging area.
Recently there were a thread about the possibility of using that work,
and offer the two interface for the wl1273 BT/FM control, so one can
choose which to use.
I'm not sure, of the BT driver for the wl1273 is in upstream.

What I propose is to:
- Help TI to get the combined interface mode out from the staging
- Work with TI, Matti, and BT guys to implement line discipline driver
to be used by the BT, and the codec/BT/FM part of wl1273
- Work with TI, Matti, and BT guys, and convert/add support for the
combined interface mode in the existing MFD/codec/V4L/BT driver.


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