From: Christoph Huber <c.huber@xxxxxxxxxxxxxxxxxx>
commit cbaadf0f90d6 (ASoC: atmel_ssc_dai: refactor the startup and shutdown)
refactored code such that the SSC is reset on every startup;
this breaks duplex audio (e.g. first start audio playback, then start record,
causing the playback to stop/hang)
Signed-off-by: Christoph Huber <c.huber@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Peter Meerwald-Stadler <p.meerwald@xxxxxxxxxxxxxxxxxx>
Cc: Songjun Wu <songjun.wu@xxxxxxxxxxxxx>
Cc: Nicolas Ferre <nicolas.ferre@xxxxxxxxx>
---
sound/soc/atmel/atmel_ssc_dai.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/sound/soc/atmel/atmel_ssc_dai.c b/sound/soc/atmel/atmel_ssc_dai.c
index 841d059..b3e9f0c 100644
--- a/sound/soc/atmel/atmel_ssc_dai.c
+++ b/sound/soc/atmel/atmel_ssc_dai.c
@@ -298,8 +298,9 @@ static int atmel_ssc_startup(struct snd_pcm_substream *substream,
clk_enable(ssc_p->ssc->clk);
ssc_p->mck_rate = clk_get_rate(ssc_p->ssc->clk);
- /* Reset the SSC to keep it at a clean status */
- ssc_writel(ssc_p->ssc->regs, CR, SSC_BIT(CR_SWRST));
+ /* Reset the SSC if it is not initialized to keep it at a clean status */
+ if(!ssc_p->initialized)
+ ssc_writel(ssc_p->ssc->regs, CR, SSC_BIT(CR_SWRST));
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
dir = 0;
--
2.1.4
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