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Diffstat (limited to 'sound/soc/fsl/fsl_ssi.c')
-rw-r--r--sound/soc/fsl/fsl_ssi.c20
1 files changed, 2 insertions, 18 deletions
diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c
index 169bca295b78..72823a2b33d6 100644
--- a/sound/soc/fsl/fsl_ssi.c
+++ b/sound/soc/fsl/fsl_ssi.c
@@ -466,28 +466,12 @@ static int fsl_ssi_trigger(struct snd_pcm_substream *substream, int cmd,
466 case SNDRV_PCM_TRIGGER_START: 466 case SNDRV_PCM_TRIGGER_START:
467 clrbits32(&ssi->scr, CCSR_SSI_SCR_SSIEN); 467 clrbits32(&ssi->scr, CCSR_SSI_SCR_SSIEN);
468 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 468 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
469 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 469 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
470 setbits32(&ssi->scr, 470 setbits32(&ssi->scr,
471 CCSR_SSI_SCR_SSIEN | CCSR_SSI_SCR_TE); 471 CCSR_SSI_SCR_SSIEN | CCSR_SSI_SCR_TE);
472 } else { 472 else
473 long timeout = jiffies + 10;
474
475 setbits32(&ssi->scr, 473 setbits32(&ssi->scr,
476 CCSR_SSI_SCR_SSIEN | CCSR_SSI_SCR_RE); 474 CCSR_SSI_SCR_SSIEN | CCSR_SSI_SCR_RE);
477
478 /* Wait until the SSI has filled its FIFO. Without this
479 * delay, ALSA complains about overruns. When the FIFO
480 * is full, the DMA controller initiates its first
481 * transfer. Until then, however, the DMA's DAR
482 * register is zero, which translates to an
483 * out-of-bounds pointer. This makes ALSA think an
484 * overrun has occurred.
485 */
486 while (!(in_be32(&ssi->sisr) & CCSR_SSI_SISR_RFF0) &&
487 (jiffies < timeout));
488 if (!(in_be32(&ssi->sisr) & CCSR_SSI_SISR_RFF0))
489 return -EIO;
490 }
491 break; 475 break;
492 476
493 case SNDRV_PCM_TRIGGER_STOP: 477 case SNDRV_PCM_TRIGGER_STOP: