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SubjectRe: [v4l-dvb-maintainer] [PATCH] new driver for TLV320AIC23B
On Wednesday 10 May 2006 23:55, Scott Alfter wrote:
> Signed-off-by: Scott Alfter <>
> It took a little bit longer than I thought, but the attached patch
> adds a driver for the TI TLV320AIC23B audio codec. It implements
> analog audio capture at 32, 44.1, and 48 kHz (16-bit stereo). The
> hardware is capable of more (it supports more sample rates and
> includes analog output), but in its current form, the driver works
> well with ivtv.
> The patch is attached; a test mailing indicated that Thunderbird
> attaches patches inline instead of encoded. The patch is also
> available from this URL:
> Scott Alfter

Hi Scott,

I've taken a quick look and I noticed a few things: first of all I
recommend making a patch against the v4l-dvb repository as there have
been a few changes compared to 2.6.16 that are relevant. In particular
your device should start supporting VIDIOC_INT_G/S_AUDIO_ROUTING
commands instead of VIDIOC_G/S_AUDIO. See the definition of these
commands in v4l2-common.h for more info. This also implies that a
media/tlv320aic23b.h header should be added (look at the existing
headers such as wm8775.h).

I also noticed what seems to be a superfluous TODO in the

The enum (R7, R11, etc) isn't used and can be removed.

The input field of struct tlv320aic23b_state doesn't seem to be used, so
that too can be removed.

You probably do not have to implement the VIDIOC_S_FREQUENCY command,
that was wm8775 specific. I doubt it is necessary for this driver.

It is also a good idea to add support for older kernels to this driver
(again, see the #if lines in the wm8775.c driver).

Hmm, well that seems to be it.


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