Re: Fwd: No audio in HW Compressed MPEG2 container on HVR-1300

[lawrence rust <lawrence@softsystem.co.uk>]

On Fri, 2010-08-06 at 08:22 -0400, Andy Walls wrote:
> On Fri, 2010-08-06 at 11:40 +0200, lawrence rust wrote:
> > On Fri, 2010-08-06 at 11:49 +1200, Shane Harrison wrote:
> 
> > > Well still no luck this end.  Have done the following:
> 
> > > 2) Applied the patch - no change (we were detecting the WM8775 OK
> 
> BTW, I forgot to mention the ivtv driver uses the WM8775 module for the
> PVR-150 card.  Changes to that module that affect the default setting
> needs to be done in a way that doesn't break the PVR-150.
> 

I believe that the patch that I posted for wm8775.c preserves the
original functionality (for ivtv and other dependants) although it
clearly achieves this through a different sequence of register writes.
The only major change to function is from ALC to manual level control
using the ALSA mixer API - which generally gives a better audio
experience.

> Maybe a .s_config() method in the WM8775 v4l2_subdev_core_ops would be
> the way to do that, or by passing parameters in struct i2c_board_info
> (according to a recent post by Hans Verkuil).

Good idea. If my current method breaks any existing code then I'll do
that, but for the moment I believe that they can co-exist.

Comments, criticisms and errata much appreciated.

> 
> Regards,
> Andy

-- Lawrence