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| author | guoyh <guoyh@marvell.com> | 2012-05-07 15:34:24 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-05-07 12:55:35 +0100 |
| commit | d93ca1ae61adf67104a78739b793b27a7886c489 (patch) | |
| tree | 61fcf6336da0d5331fb4beb5d376fc7b5329b9d6 | |
| parent | 3cb81651d070edfbea83eef763c3ca3c6f3848fd (diff) | |
| download | linux-3.10-d93ca1ae61adf67104a78739b793b27a7886c489.tar.gz linux-3.10-d93ca1ae61adf67104a78739b793b27a7886c489.tar.bz2 linux-3.10-d93ca1ae61adf67104a78739b793b27a7886c489.zip | |
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>
| -rw-r--r-- | sound/soc/pxa/pxa-ssp.c | 28 |
1 files changed, 11 insertions, 17 deletions
diff --git a/sound/soc/pxa/pxa-ssp.c b/sound/soc/pxa/pxa-ssp.c index fd04ce13903..1c2aa7fab3f 100644 --- a/sound/soc/pxa/pxa-ssp.c +++ b/sound/soc/pxa/pxa-ssp.c @@ -85,14 +85,12 @@ struct pxa2xx_pcm_dma_data { 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 @@ pxa_ssp_get_dma_params(struct ssp_device *ssp, int width4, int out) (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 @@ static int pxa_ssp_startup(struct snd_pcm_substream *substream, { 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 @@ static int pxa_ssp_startup(struct snd_pcm_substream *substream, 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 @@ static int pxa_ssp_hw_params(struct snd_pcm_substream *substream, 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) |