ASoC: pxa: allocate the SSP DMA parameters in startup
Allocating the SSP DMA parameters in startup, freeing it in
shutdown instead of freeing and re-allocating it in hw_params.
After doing that, the logic is clear and more safe.
Signed-off-by: guoyh <guoyh@marvell.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/pxa/pxa-ssp.c b/sound/soc/pxa/pxa-ssp.c
index fd04ce1..1c2aa7f 100644
--- a/sound/soc/pxa/pxa-ssp.c
+++ b/sound/soc/pxa/pxa-ssp.c
@@ -85,14 +85,12 @@
char name[20];
};
-static struct pxa2xx_pcm_dma_params *
-pxa_ssp_get_dma_params(struct ssp_device *ssp, int width4, int out)
+static void pxa_ssp_set_dma_params(struct ssp_device *ssp, int width4,
+ int out, struct pxa2xx_pcm_dma_params *dma_data)
{
struct pxa2xx_pcm_dma_data *dma;
- dma = kzalloc(sizeof(struct pxa2xx_pcm_dma_data), GFP_KERNEL);
- if (dma == NULL)
- return NULL;
+ dma = container_of(dma_data, struct pxa2xx_pcm_dma_data, params);
snprintf(dma->name, 20, "SSP%d PCM %s %s", ssp->port_id,
width4 ? "32-bit" : "16-bit", out ? "out" : "in");
@@ -103,8 +101,6 @@
(DCMD_INCTRGADDR | DCMD_FLOWSRC)) |
(width4 ? DCMD_WIDTH4 : DCMD_WIDTH2) | DCMD_BURST16;
dma->params.dev_addr = ssp->phys_base + SSDR;
-
- return &dma->params;
}
static int pxa_ssp_startup(struct snd_pcm_substream *substream,
@@ -112,6 +108,7 @@
{
struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
struct ssp_device *ssp = priv->ssp;
+ struct pxa2xx_pcm_dma_data *dma;
int ret = 0;
if (!cpu_dai->active) {
@@ -119,8 +116,10 @@
pxa_ssp_disable(ssp);
}
- kfree(snd_soc_dai_get_dma_data(cpu_dai, substream));
- snd_soc_dai_set_dma_data(cpu_dai, substream, NULL);
+ dma = kzalloc(sizeof(struct pxa2xx_pcm_dma_data), GFP_KERNEL);
+ if (!dma)
+ return -ENOMEM;
+ snd_soc_dai_set_dma_data(cpu_dai, substream, &dma->params);
return ret;
}
@@ -573,18 +572,13 @@
dma_data = snd_soc_dai_get_dma_data(cpu_dai, substream);
- /* generate correct DMA params */
- kfree(dma_data);
-
/* Network mode with one active slot (ttsa == 1) can be used
* to force 16-bit frame width on the wire (for S16_LE), even
* with two channels. Use 16-bit DMA transfers for this case.
*/
- dma_data = pxa_ssp_get_dma_params(ssp,
- ((chn == 2) && (ttsa != 1)) || (width == 32),
- substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
-
- snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
+ pxa_ssp_set_dma_params(ssp,
+ ((chn == 2) && (ttsa != 1)) || (width == 32),
+ substream->stream == SNDRV_PCM_STREAM_PLAYBACK, dma_data);
/* we can only change the settings if the port is not in use */
if (pxa_ssp_read_reg(ssp, SSCR0) & SSCR0_SSE)