i2s/pcm : add i2s dma bufferdone callback debug source

diff --git a/sound/soc/rk29/rk29_pcm.c b/sound/soc/rk29/rk29_pcm.c
index 8630a4ab5a0baf3e67c8c00c86111864707a4ade..6285a94f50e43ff53b028a927f7d25683de59607 100755 (executable)
--- a/sound/soc/rk29/rk29_pcm.c
+++ b/sound/soc/rk29/rk29_pcm.c
@@ -28,6 +28,8 @@
 
 #include "rk29_pcm.h"
 
+#define PCM_DMA_DEBUG 0
+
 #if 0
 #define DBG(x...) printk(KERN_INFO x)
 #else
@@ -137,7 +139,22 @@ void rk29_audio_buffdone(void *dev_id, int size,
 {
         struct snd_pcm_substream *substream = dev_id;
        struct rockchip_runtime_data *prtd;
-
+#if PCM_DMA_DEBUG
+       static ktime_t before = {0},after = {0};
+       s64 t;
+       before = after;
+       after = ktime_get();
+       t = ktime_to_us(ktime_sub(after, before));
+       if(result == RK29_RES_OK)
+       {
+               if(t > 23220+73 && t != ktime_to_us(after)) // 4096/4/44100 + 32/44100 
+               {
+                       printk(KERN_DEBUG "Time out:: Audio DMA buffdone time out!!! the time = %lld!\n", t);
+               }
+               printk(KERN_DEBUG "audio DMA callback time = %lld\n", t);
+       }
+//     printk(KERN_DEBUG "a %d %d\n", size, result);
+#endif
        DBG("Enter::%s----%d\n",__FUNCTION__,__LINE__);
        
        if (!substream)