ASoC: imx: use more robust checking of available streams

Replace the channels_min check with a check for the relevant substream
being present. Suggested here [1] when mxs implemented the
audio-support.

[1] http://www.spinics.net/lists/arm-kernel/msg133010.html

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

2 files changed, 7 insertions, 8 deletions

diff --git a/sound/soc/imx/imx-pcm-fiq.c b/sound/soc/imx/imx-pcm-fiq.c
index 309c59e6fb6c..ac790e87e231 100644
--- a/sound/soc/imx/imx-pcm-fiq.c
+++ b/sound/soc/imx/imx-pcm-fiq.c
@@ -243,23 +243,22 @@ static int imx_pcm_fiq_new(struct snd_soc_pcm_runtime *rtd)
         struct snd_card *card = rtd->card->snd_card;
         struct snd_soc_dai *dai = rtd->cpu_dai;
         struct snd_pcm *pcm = rtd->pcm;
+        struct snd_pcm_substream *substream;
         int ret;
 
         ret = imx_pcm_new(rtd);
         if (ret)
                 return ret;
 
-        if (dai->driver->playback.channels_min) {
-                struct snd_pcm_substream *substream =
-                        pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
+        substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
+        if (substream) {
                 struct snd_dma_buffer *buf = &substream->dma_buffer;
 
                 imx_ssi_fiq_tx_buffer = (unsigned long)buf->area;
         }
 
-        if (dai->driver->capture.channels_min) {
-                struct snd_pcm_substream *substream =
-                        pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream;
+        substream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream;
+        if (substream) {
                 struct snd_dma_buffer *buf = &substream->dma_buffer;
 
                 imx_ssi_fiq_rx_buffer = (unsigned long)buf->area;
diff --git a/sound/soc/imx/imx-ssi.c b/sound/soc/imx/imx-ssi.c
index 3b8d5cd2516a..4297cb6af42e 100644
--- a/sound/soc/imx/imx-ssi.c
+++ b/sound/soc/imx/imx-ssi.c
@@ -399,14 +399,14 @@ int imx_pcm_new(struct snd_soc_pcm_runtime *rtd)
                 card->dev->dma_mask = &imx_pcm_dmamask;
         if (!card->dev->coherent_dma_mask)
                 card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
-        if (dai->driver->playback.channels_min) {
+        if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
                 ret = imx_pcm_preallocate_dma_buffer(pcm,
                         SNDRV_PCM_STREAM_PLAYBACK);
                 if (ret)
                         goto out;
         }
 
-        if (dai->driver->capture.channels_min) {
+        if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
                 ret = imx_pcm_preallocate_dma_buffer(pcm,
                         SNDRV_PCM_STREAM_CAPTURE);
                 if (ret)