[ALSA] soc - ASoC 0.13 pxa2xx DMA

This patch updates the pxa2xx I2S driver to the new API in ASoC 0.13.
Changes:-
o Added check in hw_params to detect buffer less pcms (i.e. BT <-->
codec).
o Updated structures to new API
o Removed DAI's and ac97 ops from PCM header.
o Integer hardware constraint added for periods.

Signed-off-by: Andrew Johnson <ajohnson@intrinsyc.com>
Signed-off-by: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

1 files changed, 10 insertions, 1 deletions

diff --git a/sound/soc/pxa/pxa2xx-pcm.c b/sound/soc/pxa/pxa2xx-pcm.c
index ff32f892287e..35e8fa3a469c 100644
--- a/sound/soc/pxa/pxa2xx-pcm.c
+++ b/sound/soc/pxa/pxa2xx-pcm.c
@@ -76,13 +76,18 @@ static int pxa2xx_pcm_hw_params(struct snd_pcm_substream *substream,
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct pxa2xx_runtime_data *prtd = runtime->private_data;
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
-	struct pxa2xx_pcm_dma_params *dma = rtd->cpu_dai->dma_data;
+	struct pxa2xx_pcm_dma_params *dma = rtd->dai->cpu_dai->dma_data;
 	size_t totsize = params_buffer_bytes(params);
 	size_t period = params_period_bytes(params);
 	pxa_dma_desc *dma_desc;
 	dma_addr_t dma_buff_phys, next_desc_phys;
 	int ret;
 
+	/* return if this is a bufferless transfer e.g.
+	 * codec <--> BT codec or GSM modem -- lg FIXME */
+	 if (!dma)
+	 	return 0;
+
 	/* this may get called several times by oss emulation
 	 * with different params */
 	if (prtd->params == NULL) {
@@ -227,6 +232,10 @@ static int pxa2xx_pcm_open(struct snd_pcm_substream *substream)
 	if (ret)
 		goto out;
 
+	ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
+	if (ret < 0)
+		goto out;
+
 	prtd = kzalloc(sizeof(struct pxa2xx_runtime_data), GFP_KERNEL);
 	if (prtd == NULL) {
 		ret = -ENOMEM;