Merge branch 'for-2.6.34' of git://opensource.wolfsonmicro.com/linux-2.6-asoc into topic/asoc
diff --git a/sound/soc/imx/imx-pcm-fiq.c b/sound/soc/imx/imx-pcm-fiq.c
index 5532579..d9cb984 100644
--- a/sound/soc/imx/imx-pcm-fiq.c
+++ b/sound/soc/imx/imx-pcm-fiq.c
@@ -35,22 +35,25 @@
struct imx_pcm_runtime_data {
int period;
int periods;
- unsigned long dma_addr;
- int dma;
unsigned long offset;
+ unsigned long last_offset;
unsigned long size;
- unsigned long period_cnt;
- void *buf;
struct timer_list timer;
- int period_time;
+ int poll_time;
};
+static inline void imx_ssi_set_next_poll(struct imx_pcm_runtime_data *iprtd)
+{
+ iprtd->timer.expires = jiffies + iprtd->poll_time;
+}
+
static void imx_ssi_timer_callback(unsigned long data)
{
struct snd_pcm_substream *substream = (void *)data;
struct snd_pcm_runtime *runtime = substream->runtime;
struct imx_pcm_runtime_data *iprtd = runtime->private_data;
struct pt_regs regs;
+ unsigned long delta;
get_fiq_regs(®s);
@@ -59,9 +62,25 @@
else
iprtd->offset = regs.ARM_r9 & 0xffff;
- iprtd->timer.expires = jiffies + iprtd->period_time;
+ /* How much data have we transferred since the last period report? */
+ if (iprtd->offset >= iprtd->last_offset)
+ delta = iprtd->offset - iprtd->last_offset;
+ else
+ delta = runtime->buffer_size + iprtd->offset
+ - iprtd->last_offset;
+
+ /* If we've transferred at least a period then report it and
+ * reset our poll time */
+ if (delta >= runtime->period_size) {
+ snd_pcm_period_elapsed(substream);
+ iprtd->last_offset = iprtd->offset;
+
+ imx_ssi_set_next_poll(iprtd);
+ }
+
+ /* Restart the timer; if we didn't report we'll run on the next tick */
add_timer(&iprtd->timer);
- snd_pcm_period_elapsed(substream);
+
}
static struct fiq_handler fh = {
@@ -76,9 +95,10 @@
iprtd->size = params_buffer_bytes(params);
iprtd->periods = params_periods(params);
- iprtd->period = params_period_bytes(params);
+ iprtd->period = params_period_bytes(params) ;
iprtd->offset = 0;
- iprtd->period_time = HZ / (params_rate(params) / params_period_size(params));
+ iprtd->last_offset = 0;
+ iprtd->poll_time = HZ / (params_rate(params) / params_period_size(params));
snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
@@ -114,7 +134,7 @@
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
- iprtd->timer.expires = jiffies + iprtd->period_time;
+ imx_ssi_set_next_poll(iprtd);
add_timer(&iprtd->timer);
if (++fiq_enable == 1)
enable_fiq(imx_pcm_fiq);