static int omap_mcpdm_prepare(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct omap_mcpdm *mcpdm = snd_soc_dai_get_drvdata(dai);
struct pm_qos_request *pm_qos_req = &mcpdm->pm_qos_req;
int tx = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
int stream1 = tx ? SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE;
int stream2 = tx ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
int latency = mcpdm->latency[stream2];
/* Prevent omap hardware from hitting off between FIFO fills */
if (!latency || mcpdm->latency[stream1] < latency)
latency = mcpdm->latency[stream1];
if (pm_qos_request_active(pm_qos_req))
pm_qos_update_request(pm_qos_req, latency);
else if (latency)
pm_qos_add_request(pm_qos_req, PM_QOS_CPU_DMA_LATENCY, latency);
if (!omap_mcpdm_active(mcpdm)) {
omap_mcpdm_start(mcpdm);
omap_mcpdm_reg_dump(mcpdm);
} else if (mcpdm->restart) {
omap_mcpdm_stop(mcpdm);
omap_mcpdm_start(mcpdm);
mcpdm->restart = false;
omap_mcpdm_reg_dump(mcpdm);
}
return 0;
}
static void omap_mcpdm_dai_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct omap_mcpdm *mcpdm = snd_soc_dai_get_drvdata(dai);
int tx = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
int stream1 = tx ? SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE;
int stream2 = tx ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
mutex_lock(&mcpdm->mutex);
if (!dai->active) {
if (omap_mcpdm_active(mcpdm)) {
omap_mcpdm_stop(mcpdm);
omap_mcpdm_close_streams(mcpdm);
mcpdm->config[0].link_mask = 0;
mcpdm->config[1].link_mask = 0;
}
}
if (mcpdm->latency[stream2])
pm_qos_update_request(&mcpdm->pm_qos_req,
mcpdm->latency[stream2]);
else if (mcpdm->latency[stream1])
pm_qos_remove_request(&mcpdm->pm_qos_req);
mcpdm->latency[stream1] = 0;
mutex_unlock(&mcpdm->mutex);
}
static int omap_mcpdm_prepare(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct omap_mcpdm *mcpdm = snd_soc_dai_get_drvdata(dai);
if (!omap_mcpdm_active(mcpdm)) {
omap_mcpdm_start(mcpdm);
omap_mcpdm_reg_dump(mcpdm);
} else if (mcpdm->restart) {
omap_mcpdm_stop(mcpdm);
omap_mcpdm_start(mcpdm);
mcpdm->restart = false;
omap_mcpdm_reg_dump(mcpdm);
}
return 0;
}
static void omap_mcpdm_dai_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct omap_mcpdm *mcpdm = snd_soc_dai_get_drvdata(dai);
mutex_lock(&mcpdm->mutex);
if (!dai->active) {
if (omap_mcpdm_active(mcpdm)) {
omap_mcpdm_stop(mcpdm);
omap_mcpdm_close_streams(mcpdm);
mcpdm->config[0].link_mask = 0;
mcpdm->config[1].link_mask = 0;
}
}
mutex_unlock(&mcpdm->mutex);
}