[PATCH] ASoC: pcm: Add pcm operation for pcm ioctl.

[Liam Girdwood <lrg@ti.com>]

Provide an ioctl marshaller for ASoC platform drivers.
This will use the default ALSA handler if no platform
handler exists.

This is also required for DPCM BE PCMs as snd_pcm_info()
will call the ioctl as part of stream startup.

Signed-off-by: Liam Girdwood <lrg@ti.com>
---
 sound/soc/soc-pcm.c |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index 5bd8270..4e3be82 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -1647,6 +1647,17 @@ out:
 	return ret;
 }
 
+static int soc_pcm_ioctl(struct snd_pcm_substream *substream,
+		     unsigned int cmd, void *arg)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_platform *platform = rtd->platform;
+
+	if (platform->driver->ops->ioctl)
+		return platform->driver->ops->ioctl(substream, cmd, arg);
+	return snd_pcm_lib_ioctl(substream, cmd, arg);
+}
+
 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
 {
 	struct snd_pcm_substream *substream =
@@ -2051,6 +2062,7 @@ int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
 		rtd->ops.hw_free	= dpcm_fe_dai_hw_free;
 		rtd->ops.close		= dpcm_fe_dai_close;
 		rtd->ops.pointer	= soc_pcm_pointer;
+		rtd->ops.ioctl		= soc_pcm_ioctl;
 	} else {
 		rtd->ops.open		= soc_pcm_open;
 		rtd->ops.hw_params	= soc_pcm_hw_params;
@@ -2059,6 +2071,7 @@ int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
 		rtd->ops.hw_free	= soc_pcm_hw_free;
 		rtd->ops.close		= soc_pcm_close;
 		rtd->ops.pointer	= soc_pcm_pointer;
+		rtd->ops.ioctl		= soc_pcm_ioctl;
 	}
 
 	if (platform->driver->ops) {
-- 
1.7.5.4