Patrick Ziegler wrote:
I have some trouble with stereo audio through the atmal ssc interface based on at91-ssc.c.
(Merged into atmel_ssc_dai.c since about one year ago.)
Unfortunately left and right channels were swapped periodically.
In my environment the codec supplies the BLCK and LRC clocks and the SSC is configured to transmit one sample on both edges of the LRC clock. But I guess the audio frames will always start with a frame of the left channel while the LRC clock is in an undefined state.
Indeed.
How does normally the audio driver detect when a left and when a right channel frame should be send and with which it should start ?
The driver cannot do anything about this; the hardware must be told to start transmitting at the falling edge.
If possible.
Is there a reason why the codec supplies LRC?
Regards, Clemens