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List:       linux-sound
Subject:    [PATCH 3/3] ASoC: atmel_ssc_dai: only clean PDC when using PDC
From:       Bo Shen <voice.shen () atmel ! com>
Date:       2015-01-30 9:38:44
Message-ID: 1422610724-7222-4-git-send-email-voice.shen () atmel ! com
[Download RAW message or body]

Only using PDC, it needs to clean PDC registers.

Signed-off-by: Bo Shen <voice.shen@atmel.com>
---

 sound/soc/atmel/atmel_ssc_dai.c | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/sound/soc/atmel/atmel_ssc_dai.c b/sound/soc/atmel/atmel_ssc_dai.c
index 0ed5ac3..80eb1f1 100644
--- a/sound/soc/atmel/atmel_ssc_dai.c
+++ b/sound/soc/atmel/atmel_ssc_dai.c
@@ -599,15 +599,17 @@ static int atmel_ssc_hw_params(struct snd_pcm_substream *substream,
 			rcmr, rfmr, tcmr, tfmr);
 
 	if (!ssc_p->initialized) {
-		ssc_writel(ssc_p->ssc->regs, PDC_RPR, 0);
-		ssc_writel(ssc_p->ssc->regs, PDC_RCR, 0);
-		ssc_writel(ssc_p->ssc->regs, PDC_RNPR, 0);
-		ssc_writel(ssc_p->ssc->regs, PDC_RNCR, 0);
-
-		ssc_writel(ssc_p->ssc->regs, PDC_TPR, 0);
-		ssc_writel(ssc_p->ssc->regs, PDC_TCR, 0);
-		ssc_writel(ssc_p->ssc->regs, PDC_TNPR, 0);
-		ssc_writel(ssc_p->ssc->regs, PDC_TNCR, 0);
+		if (!ssc_p->ssc->pdata->use_dma) {
+			ssc_writel(ssc_p->ssc->regs, PDC_RPR, 0);
+			ssc_writel(ssc_p->ssc->regs, PDC_RCR, 0);
+			ssc_writel(ssc_p->ssc->regs, PDC_RNPR, 0);
+			ssc_writel(ssc_p->ssc->regs, PDC_RNCR, 0);
+
+			ssc_writel(ssc_p->ssc->regs, PDC_TPR, 0);
+			ssc_writel(ssc_p->ssc->regs, PDC_TCR, 0);
+			ssc_writel(ssc_p->ssc->regs, PDC_TNPR, 0);
+			ssc_writel(ssc_p->ssc->regs, PDC_TNCR, 0);
+		}
 
 		ret = request_irq(ssc_p->ssc->irq, atmel_ssc_interrupt, 0,
 				ssc_p->name, ssc_p);
-- 
2.3.0.rc0

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