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drivers: imx: sai: Make sure Tx/Rx is disabled at stop 

TE/RE bit will remain set until the end of current frame. So,
for example, even if we set TE to 0 the transmitter will still be
enabled until the end of current frame.

This can have unexpected results when quickly restarting a channel.
Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
This commit is contained in:
Daniel Baluta 2020-10-20 11:51:24 +03:00 committed by Liam Girdwood
parent 2fe7c89489
commit 7709924f16
1 changed files with 6 additions and 0 deletions
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6
src/drivers/imx/sai.c
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@ -12,6 +12,7 @@
#include <sof/drivers/sai.h>
#include <sof/lib/dai.h>
#include <sof/lib/dma.h>
#include <sof/lib/wait.h>
#include <sof/lib/uuid.h>
#include <ipc/dai.h>
#include <errno.h>
@ -85,7 +86,12 @@ static void sai_stop(struct dai *dai, int direction)
if (!(xcsr & REG_SAI_CSR_FRDE)) {
/* Disable both directions and reset their FIFOs */
dai_update_bits(dai, REG_SAI_TCSR, REG_SAI_CSR_TERE, 0);
poll_for_register_delay(dai_base(dai) + REG_SAI_TCSR,
REG_SAI_CSR_TERE, 0, 100);
dai_update_bits(dai, REG_SAI_RCSR, REG_SAI_CSR_TERE, 0);
poll_for_register_delay(dai_base(dai) + REG_SAI_RCSR,
REG_SAI_CSR_TERE, 0, 100);
/* Software Reset for both Tx and Rx */
dai_update_bits(dai, REG_SAI_TCSR, REG_SAI_CSR_SR,