[FFADO-devel] [patch][Fireworks] modigy function for swtching digital interface (server side only)

[Takashi S. <o-t...@sa...>]

Hi,

This series of patch is for the function to switch digital interface.
AudioFire8A and AudioFirePre8 supports this function.

The current implementation of FFADO for this function is not good in two
points.
1. wrong flag name
2. lack of control

1. According to Echo's owners manual version 2.2, all of models based on
Fireworks have coaxial digital interface. But In
/src/fireworks/efc/efc_cmd.h, there is a flag named as
'EFC_CMD_HW_SPDIF_COAX_SUPPORTED'. This should be indicate 'optical',
not 'coaxial'.

Additionally, I know the actual value of flag for four devices below:
AF2: 0xA1
AF4: 0xE1
AFPre8: 0x625
AF12: 0x11
(special thanks to Doug McLain!)

Only AFPre8 set this flag as 1. So this flag means 'the device has
optical digital interface'.

2. My patch add 'DigitalInterface' control.

These patches are based on revision 2388, not depends on my previous
series of patches.
In this time, the target of these patches is server only. I have a plan
to commit mixer GUI a few weeks later.


Thanks

Takashi Sakamoto