On Tue, 2007-05-22 at 10:47 -0500, Timur Tabi wrote: > I'm working on some ASoC drivers for a new board, and we're using a CS4270. The CS4270 is > interesting in that if it is connected in stand-alone mode, there is no way to configure > it. The board wirings determine all the parameters. > > Therefore, my CS4270 codec driver will probably be very skimpy. > > My question is: does this mean that my cs4270.c file will *never* call these functions: > > snd_ctl_add > snd_soc_cnew These functions are only required in the codec driver to change volume, mixer settings etc. If your codec has no volume or mixers then you don't need them. > snd_soc_dapm_new_control > snd_soc_dapm_connect_input > snd_soc_dapm_new_widgets These are used for setting up the dynamic audio power management and won't be needed in stand alone mode. > > These are the functions used to add new controls and widgets. > > So how does ALSA know that it needs to call my I2S driver *instead* of my codec driver to > do stuff like change volume? You probably want to create a volume kcontrol in your I2S driver. I assume your I2S controller can digitally adjust the volume by altering the PCM stream ? The kcontrols can be added in your I2S driver probe function. Liam _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
