MLK-9731 ASoC: imx-hdmi-dma: audio output is noisy in long time playback

In the frame_to_bytes(), when hw_ptr*frame_bits exceed the maxmum of unsigned long, the return value is saturated, so the appl_bytes is wrong. This patch is to correct the usage of frame_to_bytes(). Signed-off-by: Shengjiu Wang <shengjiu.wang@freescale.com> (cherry picked from commit 9e66132d)

MLK-9731 ASoC: imx-hdmi-dma: audio output is noisy in long time playback
f35a8110 · Shengjiu Wang · Nitin Garg · 1f96248f · f35a8110
Commit f35a8110 authored Oct 31, 2014 by Shengjiu Wang Committed by Nitin Garg Jan 15, 2015
Hide whitespace changes
Inline Side-by-side

Showing with 1 addition and 1 deletion

imx-hdmi-dma.c sound/soc/fsl/imx-hdmi-dma.c +1 -1

No files found.
--- a/sound/soc/fsl/imx-hdmi-dma.c
+++ b/sound/soc/fsl/imx-hdmi-dma.c
@@ -455,7 +455,7 @@ static void hdmi_dma_data_copy(struct snd_pcm_substream *substream,
 	if (runtime->access != SNDRV_PCM_ACCESS_MMAP_INTERLEAVED)
 		return;

-	appl_bytes = frames_to_bytes(runtime, runtime->status->hw_ptr);
+	appl_bytes =  runtime->status->hw_ptr * (runtime->frame_bits / 8);
 	if (type == 'p')
 		appl_bytes += 2 * priv->period_bytes;
 	offset = appl_bytes % priv->buffer_bytes;