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koalo / linux

Development of a I2S sound driver for the Raspberry Pi
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bitclock not consistent (32xFS, 64xFS) #18

Closed ghost closed 10 years ago

ghost commented 11 years ago

bcm2708-i2s.c: Samplerates, that uses MASH mode use BCLK=64xFS, other 32xFS. The default setting should be 64xFS for all modes. It would also help, if this would be configurable by the sound card driver. The driver should be able to initialize the clock that it needs.

--- ./sound/soc/bcm2708/bcm2708-i2s.c 2013-09-13 20:40:45.630200001 +0200 +++ ./sound/soc/bcm2708/bcm2708-i2s.c.orig 2013-09-13 22:40:09.582200003 +0200 @@ -476,9 +476,6 @@ * variance. To minimize that it is best to have the fastest * clock here. That is PLLD with 500 MHz. */

target_frequency = sampling_rate*half_frame*2;
clk_src = BCM2708_CLK_SRC_OSC;
mash = BCM2708_CLK_MASH_0;
koalo commented 10 years ago

It is now configurable by the machine driver with 3.10.