On Thu, Nov 20, 2008 at 05:21:11PM +0530, naveen krishna ch wrote:
On Thu, Nov 20, 2008 at 4:53 PM, Mark Brown broonie@sirena.org.uk wrote:
As I said in reply to your first mail I'd really like to see some sort of explanation as to why you are making these changes - are the defaults in the existing driver wrong? There seem to be an awful lot of changes here and there's no discussion in the patch as to what they mean.
The existing driver does the default settings for only one input device (Line in) and one output device (Headset out). The CODEC supports 5 output devices and 4 input devices.
Thanks for the detail here - this really should go in the changelog for your patch so people reviewing the history of the driver can see what's happened.
The default values given by the drivers author are according to his custom requirements, expanding them to the CODEC's ability these values can be modified.
What all this patch is doing is setting the default playback and capture volumes of various input and output devices to reasonable values.
It is perfectly normal for the default configuration of codecs to not be suitable for use on a given platform, normally the codec will have the power on defaults in silicon. Systems should use something like alsactl restore to set things up appropriately for their system during startup.