轉載請標註原文地址：http://blog.csdn.net/uranus_wm/article/details/12851111
前兩篇文章分別介紹了linux alsa結構和android soundrecorder的應用層實現
除了板級的初始過程，其他都是關於類層次關係的一些靜態說明
這章主要介紹下錄音的動態過程，以及數據是如何一步步獲取和保存的
還是先上圖：
這個圖大致介紹了soundrecord的流程，alsa到kernel部分還有個control模塊這裏沒有畫出來
下面一張圖裏面會提到，實際上control模塊還是影響我們代碼量主要的模塊，主要就是mixer和muxer的配置
HAL層以上前面已經說過了，這裏我們關注HAL以下部分：
- 應用層點擊錄音按鈕
- tinyalsa打開設備文件節點/dev/snd/pcmC0D0c，給出相應的採樣通道，採樣率，一幀數據大小，總buffer大小等
- tinyalsa打開設備文件節點/dev/snd/controlC0，設置codec內部相關寄存器，選擇輸入輸出device，配置內部route，即所謂dapm
- tinyalsa通過pcmC0D0c觸發錄音開始，dai_link上時鐘開啓，dapm建立後，從main_mic接收的pcm信號就會通過codec內部route發送到AIFADCDAT線上cpu exynos4412這邊AIFDACDAT接收pcm信號數據後，通過移位器將數據保存到I2S的RX_FIFO
- RX_FIFO收到數據，觸發DMA控制器開始拷貝數據，DMA(pl330)將RX_FIFO中的數據拷貝到DMA專有的內存緩衝，本例中snd_dma_buffer起始物理地址addr=0x6036_0000
- tinyalsa通過ioctl向設備節點/dev/snd/pcmC0D0c發起讀數據請求，snd_pcm會將dma緩衝buffer中的數據拷貝到tinyalsa傳入的用戶buffer中
下面這張順序圖詳細記錄了soundrecorder開啓錄音之後alsa的交互流程：
這裏我要提到的是在snd_pcm_open之後，有很大一段代碼是做constraint檢查
最開始我在調試的時候這個constraint檢查一直不過，也就是上面的1.1節點，然後後面的過程沒法進行下去
snd_pcm_open()時增加了一大推rule；這些rule的作用其實就是檢查tinyalsa指定的config對於當前dai_link是否支持
int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
int k, err;
for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
snd_mask_any(constrs_mask(constrs, k));
}
for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
snd_interval_any(constrs_interval(constrs, k));
}
snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
snd_pcm_hw_rule_format, NULL,
SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
if (err < 0)
return err;
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
snd_pcm_hw_rule_sample_bits, NULL,
SNDRV_PCM_HW_PARAM_FORMAT,
SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
if (err < 0)
return err;
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
snd_pcm_hw_rule_div, NULL,
SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
if (err < 0)
return err;
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
snd_pcm_hw_rule_mul, NULL,
SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
.......
}
其過程是這樣的：
首先snd_pcm_hardware會聲明自己支持的通道數，格式等，buffer_bytes_max是buffer總大小，其他值我也沒有詳細研究
基本按照linux原生拷貝，沒有修改
static const struct snd_pcm_hardware dma_hardware = {
.info = SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_PAUSE |
SNDRV_PCM_INFO_RESUME,
.formats = SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_U16_LE |
SNDRV_PCM_FMTBIT_U8 |
SNDRV_PCM_FMTBIT_S8,
.channels_min = 1,
.channels_max = 2,
.buffer_bytes_max = 128*1024,
.period_bytes_min = PAGE_SIZE,
.period_bytes_max = PAGE_SIZE*2,
.periods_min = 2,
.periods_max = 128,
.fifo_size = 32,
};codec_dai這邊聲明如下：
static struct snd_soc_dai_driver wm8994_dai[] = {
{
.name = "wm8994-aif1",
.id = 1,
.playback = {
.stream_name = "AIF1 Playback",
.channels_min = 1,
.channels_max = 2,
.rates = WM8994_RATES,
.formats = WM8994_FORMATS,
},
.capture = {
.stream_name = "AIF1 Capture",
.channels_min = 1,
.channels_max = 2,
.rates = WM8994_RATES,
.formats = WM8994_FORMATS,
},
.ops = &wm8994_aif1_dai_ops,
},
}；cpu_dai這邊聲明如下：
struct i2s_dai *i2s_alloc_dai(struct platform_device *pdev, bool sec)
{
struct i2s_dai *i2s;
i2s = kzalloc(sizeof(struct i2s_dai), GFP_KERNEL);
i2s->pdev = pdev;
i2s->pri_dai = NULL;
i2s->sec_dai = NULL;
i2s->i2s_dai_drv.symmetric_rates = 1;
i2s->i2s_dai_drv.probe = samsung_i2s_dai_probe;
i2s->i2s_dai_drv.remove = samsung_i2s_dai_remove;
i2s->i2s_dai_drv.ops = &samsung_i2s_dai_ops;
i2s->i2s_dai_drv.suspend = i2s_suspend;
i2s->i2s_dai_drv.resume = i2s_resume;
i2s->i2s_dai_drv.playback.channels_min = 2;
i2s->i2s_dai_drv.playback.channels_max = 2;
i2s->i2s_dai_drv.playback.rates = SAMSUNG_I2S_RATES;
i2s->i2s_dai_drv.playback.formats = SAMSUNG_I2S_FMTS;
if (!sec) {
i2s->i2s_dai_drv.capture.channels_min = 1;
i2s->i2s_dai_drv.capture.channels_max = 2;
i2s->i2s_dai_drv.capture.rates = SAMSUNG_I2S_RATES;
i2s->i2s_dai_drv.capture.formats = SAMSUNG_I2S_FMTS;
} else { /* Create a new platform_device for Secondary */
i2s->pdev = platform_device_register_resndata(NULL,
pdev->name, pdev->id + SAMSUNG_I2S_SECOFF,
NULL, 0, NULL, 0);
if (IS_ERR(i2s->pdev)) {
kfree(i2s);
return NULL;
}
}
/* Pre-assign snd_soc_dai_set_drvdata */
dev_set_drvdata(&i2s->pdev->dev, i2s);
return i2s;
}snd_pcm_open()的時候會先將snd_pcm_hardware的聲明與cpu_dai聲明做交集，然後在於codec_dai作交集
這個交集就是所選擇dai_link的支持的pcm數據格式範圍
最後tinyalsa會把用戶選擇的媒體格式數據pcm_config傳下來，如下：
struct pcm_config config = {
channels : mChannelCount,
rate : AUDIO_HW_IN_SAMPLERATE,
period_size : AUDIO_HW_IN_PERIOD_SZ,
period_count : AUDIO_HW_IN_PERIOD_CNT,
format : PCM_FORMAT_S16_LE,
start_threshold : 0,
stop_threshold : 0,
silence_threshold : 0,
};而先前說的那些rule就是檢查用戶請求的pcm_config是否在那個交集範圍之內，不在說明格式不支持
如果我們確信格式支持，但是constraint檢查不過，不用去看那些rule，直接查找我上面說的幾個聲明好了，肯定有某項不在交集範圍之內
最後貼一段record開始之後的printk打印log，方便錄音過程的理解：
[ 92.487014] wm8994-snd_pcm_capture_open
[ 92.491048] wm8994-snd_pcm_open
[ 92.494080] wm8994-snd_pcm_hw_rule_add
[ 92.497903] wm8994-snd_pcm_hw_rule_add
[ 92.501719] wm8994-snd_pcm_hw_rule_add
[ 92.505538] wm8994-snd_pcm_hw_rule_add
[ 92.509346] wm8994-snd_pcm_hw_rule_add
[ 92.513176] wm8994-snd_pcm_hw_rule_add
[ 92.516996] wm8994-snd_pcm_hw_rule_add
[ 92.520868] wm8994-snd_pcm_hw_rule_add
[ 92.524622] wm8994-snd_pcm_hw_rule_add
[ 92.528455] wm8994-snd_pcm_hw_rule_add
[ 92.532273] wm8994-snd_pcm_hw_rule_add
[ 92.536091] wm8994-snd_pcm_hw_rule_add
[ 92.539899] wm8994-snd_pcm_hw_rule_add
[ 92.543730] wm8994-snd_pcm_hw_rule_add
[ 92.547549] wm8994-snd_pcm_hw_rule_add
[ 92.551397] wm8994-snd_pcm_hw_rule_add
[ 92.555219] wm8994-snd_pcm_hw_rule_add
[ 92.558996] wm8994-snd_pcm_hw_rule_add
[ 92.562829] wm8994-snd_pcm_hw_rule_add
[ 92.566646] wm8994-snd_pcm_hw_rule_add
[ 92.570469] Entered dma_open
[ 92.573325] WM8994 AIF1: Symmetry forces 44100Hz rate
[ 92.578452] wm8994-snd_interval_refine
[ 92.582271] wm8994-snd_interval_refine
[ 92.586089] wm8994-snd_interval_refine
[ 92.589896] wm8994-snd_interval_refine
[ 92.593873] wm8994-snd_interval_refine
[ 92.597546] wm8994-snd_interval_refine
[ 92.601366] wm8994-snd_pcm_hw_rule_add
[ 92.605184] wm8994-snd_pcm_hw_rule_add
[ 92.608998] wm8994-snd_pcm_capture_ioctl
[ 92.613002] wm8994-snd_pcm_lib_ioctl cmd 0x1
[ 92.617252] wm8994-snd_pcm_capture_ioctl
[ 92.621296] wm8994-snd_interval_refine
[ 92.625064] wm8994-snd_interval_refine
[ 92.628870] wm8994-snd_interval_refine
[ 92.632701] wm8994-snd_interval_refine
.........................................
[ 92.766374] wm8994-snd_interval_refine
[ 92.770192] wm8994-snd_interval_refine
[ 92.774000] wm8994-snd_interval_refine
[ 92.777831] wm8994-snd_interval_refine
[ 92.781651] wm8994-snd_pcm_lib_ioctl cmd 0x4
[ 92.785906] wm8994-snd_interval_refine
[ 92.789711] wm8994-snd_interval_refine
[ 92.793736] wm8994-snd_interval_refine
[ 92.797361] wm8994-snd_interval_refine
[ 92.801180] wm8994-snd_interval_refine
[ 92.804987] wm8994-snd_interval_refine
[ 92.808819] wm8994-snd_interval_refine
[ 92.812638] wm8994-snd_interval_refine
[ 92.816456] wm8994-snd_interval_refine
[ 92.820320] wm8994-snd_interval_refine
[ 92.824084] wm8994-snd_interval_refine
[ 92.827917] wm8994-snd_interval_refine
[ 92.831735] wm8994-snd_interval_refine
[ 92.835553] wm8994-snd_interval_refine
[ 92.839361] wm8994-snd_interval_refine
[ 92.843191] wm8994-snd_interval_refine
[ 92.847011] wm8994-snd_interval_refine
[ 92.850857] wm8994-snd_interval_refine
[ 92.854638] wm8994-snd_pcm_lib_ioctl cmd 0x4
[ 92.858932] wm8994-snd_interval_refine
[ 92.862725] wm8994-snd_pcm_lib_ioctl cmd 0x4
[ 92.866977] wm8994-soc_pcm_hw_params
[ 92.870621] wm8994-smdk_hw_params
[ 92.873995] [zsb] wm8994_set_dai_fmt: id : 1
[ 92.878262] wm8994-codec wm8994-codec: read 300 => 2010
[ 92.883470] wm8994-codec wm8994-codec: read 302 => 4000
[ 92.888676] wm8994-i2s_set_fmt
[ 92.891945] [zsb] wm8994_set_fll
[ 92.895003] wm8994-codec wm8994-codec: read 200 => 10
[ 92.900050] wm8994-codec wm8994-codec: read 204 => 0
[ 92.904982] [zsb] wm8994_set_dai_sysclk
[ 92.908815] wm8994-codec wm8994-codec: AIF1 using FLL1
[ 92.913934] [zsb] configure_clock
[ 92.917233] [zsb] configure_aif_clock aif : 0, sysclk : 3
[ 92.922664] wm8994-codec wm8994-codec: read 200 => 10
[ 92.927652] [zsb] configure_aif_clock aif : 1, sysclk : 0
[ 92.933033] wm8994-codec wm8994-codec: read 208 => 0
[ 92.937979] [zsb] wm8994_hw_params
[ 92.941365] wm8994-codec wm8994-codec: Sample rate is 44100Hz
[ 92.947094] wm8994-codec wm8994-codec: AIF1CLK is 11289600Hz, target BCLK 1411200Hz
[ 92.954760] wm8994-codec wm8994-codec: read 300 => 2010
[ 92.959974] wm8994-codec wm8994-codec: Selected AIF1CLK/fs = 256
[ 92.965933] wm8994-codec wm8994-codec: Using BCLK_DIV 80 for actual BCLK 1411200Hz
[ 92.973482] wm8994-codec wm8994-codec: Using LRCLK rate 32 for actual LRCLK 44100Hz
[ 92.981123] wm8994-codec wm8994-codec: read 300 => 2010
[ 92.986327] wm8994-codec wm8994-codec: read 301 => 4000
[ 92.991715] wm8994-codec wm8994-codec: read 303 => 70
[ 92.996570] wm8994-codec wm8994-codec: read 305 => 20
[ 93.001604] wm8994-codec wm8994-codec: read 210 => 73
[ 93.006639] wm8994-i2s_hw_params
[ 93.009925] Entered dma_hw_params
[ 93.013236] params e00eadc0, client e00eadc0, channel 15
[ 93.018596] snd_pcm_set_runtime_buffer dma_area 0xffd60000 dma_addr 0x60600000
[ 93.025870] DmaAddr=@60600000 Total=8192bytes PrdSz=2 #Prds=4096 dma_area=0xffd60000
[ 93.033556] wm8994-snd_pcm_capture_ioctl
[ 93.037539] wm8994-snd_pcm_sw_params_user
[ 93.041639] wm8994-snd_pcm_mmap
[ 93.044835] wm8994-snd_pcm_capture_ioctl
[ 93.048869] snd_ctl_ioctl-cmd=0xc2c85512
[ 93.052781] wm8994-codec wm8994-codec: read 28 => 30
[ 93.057680] snd_ctl_ioctl-cmd=0xc2c85513
[ 93.061630] wm8994-codec wm8994-codec: read 28 => 30
[ 93.066553] snd_ctl_ioctl-cmd=0xc2c85512
[ 93.070446] wm8994-codec wm8994-codec: read 28 => 30
[ 93.075385] snd_ctl_ioctl-cmd=0xc2c85513
[ 93.079283] wm8994-codec wm8994-codec: read 28 => 30
[ 93.084246] snd_ctl_ioctl-cmd=0xc2c85512
[ 93.088148] wm8994-codec wm8994-codec: read 18 => 10c
[ 93.093324] snd_ctl_ioctl-cmd=0xc2c85513
[ 93.097086] wm8994-codec wm8994-codec: read 18 => 10c
[ 93.102126] snd_ctl_ioctl-cmd=0xc2c85512
[ 93.106028] wm8994-codec wm8994-codec: read 18 => 10c
[ 93.111059] snd_ctl_ioctl-cmd=0xc2c85513
[ 93.114954] wm8994-codec wm8994-codec: read 18 => 10c
[ 93.120079] snd_ctl_ioctl-cmd=0xc2c85512
[ 93.123901] wm8994-codec wm8994-codec: read 29 => 30
[ 93.128856] snd_ctl_ioctl-cmd=0xc2c85513
[ 93.132764] wm8994-codec wm8994-codec: read 29 => 30
[ 93.137716] snd_ctl_ioctl-cmd=0xc2c85512
[ 93.141616] wm8994-codec wm8994-codec: read 29 => 30
[ 93.146561] snd_ctl_ioctl-cmd=0xc2c85513
[ 93.150496] wm8994-codec wm8994-codec: read 29 => 30
[ 93.155429] snd_ctl_ioctl-cmd=0xc2c85512
[ 93.159312] snd_ctl_ioctl-cmd=0xc2c85513
[ 93.163271] snd_ctl_ioctl-cmd=0xc2c85512
[ 93.167138] wm8994-codec wm8994-codec: read 300 => 2010
[ 93.172341] snd_ctl_ioctl-cmd=0xc2c85513
[ 93.176249] wm8994-codec wm8994-codec: read 300 => 2010
[ 93.181464] snd_ctl_ioctl-cmd=0xc2c85512
[ 93.185363] wm8994-codec wm8994-codec: read 300 => 2010
[ 93.190755] snd_ctl_ioctl-cmd=0xc2c85513
[ 93.194464] wm8994-codec wm8994-codec: read 300 => 2010
[ 93.199691] snd_ctl_ioctl-cmd=0xc2c85512
[ 93.203591] wm8994-codec wm8994-codec: read 400 => 1ee
[ 93.208710] wm8994-codec wm8994-codec: read 401 => 1ee
[ 93.213831] snd_ctl_ioctl-cmd=0xc2c85513
[ 93.217738] wm8994-codec wm8994-codec: read 400 => 1ee
[ 93.222903] wm8994-codec wm8994-codec: read 401 => 1ee
[ 93.227981] snd_ctl_ioctl-cmd=0xc2c85512
[ 93.231888] wm8994-codec wm8994-codec: read 400 => 1ee
[ 93.237007] wm8994-codec wm8994-codec: read 401 => 1ee
[ 93.242130] snd_ctl_ioctl-cmd=0xc2c85513
[ 93.246036] wm8994-codec wm8994-codec: read 400 => 1ee
[ 93.251182] wm8994-codec wm8994-codec: read 401 => 1ee
[ 93.256291] snd_ctl_ioctl-cmd=0xc2c85512
[ 93.260188] wm8994-codec wm8994-codec: read 440 => 9b
[ 93.265246] snd_ctl_ioctl-cmd=0xc2c85513
[ 93.269114] wm8994-codec wm8994-codec: read 440 => 9b
[ 93.274159] wm8994-codec wm8994-codec: read 440 => 9b
[ 93.279204] snd_ctl_ioctl-cmd=0xc2c85512
[ 93.283101] wm8994-codec wm8994-codec: read 440 => 9b
[ 93.288132] snd_ctl_ioctl-cmd=0xc2c85513
[ 93.292182] wm8994-codec wm8994-codec: read 440 => 9b
[ 93.297073] wm8994-codec wm8994-codec: read 440 => 9b
[ 93.302121] snd_ctl_ioctl-cmd=0xc2c85512
[ 93.306020] wm8994-codec wm8994-codec: read 606 => 2
[ 93.310961] snd_ctl_ioctl-cmd=0xc2c85513
[ 93.314858] wm8994-codec wm8994-codec: read 606 => 2
[ 93.319828] snd_ctl_ioctl-cmd=0xc2c85512
[ 93.323772] wm8994-codec wm8994-codec: read 607 => 2
[ 93.328669] snd_ctl_ioctl-cmd=0xc2c85513
[ 93.332578] wm8994-codec wm8994-codec: read 607 => 2
[ 93.337562] wm8994-snd_pcm_capture_ioctl
[ 93.341519] wm8994-soc_pcm_prepare
[ 93.344975] Entered dma_prepare addr=0x03830014,size=2,start=0x60600000
[ 93.351617] Entered dma_enqueue
[ 93.354694] dma_enqueue: loaded 0, limit 2
[ 93.358920] wm8994-codec wm8994-codec: read 208 => 0
[ 93.364156] [zsb] wm8994_set_bias_level: 2
[ 93.367849] wm8994-codec wm8994-codec: read 1 => 35
[ 93.372676] wm8994-codec wm8994-codec: write 1 = 33
[ 93.377537] wm8994-codec wm8994-codec: 0x0001 <- 0x0033
[ 93.382920] [zsb] aif1clk_ev
[ 93.385613] wm8994-codec wm8994-codec: read 208 => 0
[ 93.390744] wm8994-codec wm8994-codec: write 208 = a
[ 93.395503] wm8994-codec wm8994-codec: 0x0208 <- 0x000a
[ 93.400884] wm8994-codec wm8994-codec: read 4 => 0
[ 93.405486] wm8994-codec wm8994-codec: write 4 = 200
[ 93.410433] wm8994-codec wm8994-codec: 0x0004 <- 0x0200
[ 93.415810] wm8994-codec wm8994-codec: read 200 => 10
[ 93.420680] wm8994-codec wm8994-codec: write 200 = 11
[ 93.425763] wm8994-codec wm8994-codec: 0x0200 <- 0x0011
[ 93.431090] wm8994-codec wm8994-codec: read 5 => 3
[ 93.435917] wm8994-codec wm8994-codec: read 900 => 0
[ 93.440640] wm8994-codec wm8994-codec: read 5 => 3
[ 93.445615] wm8994-codec wm8994-codec: read 900 => 0
[ 93.450366] wm8994-codec wm8994-codec: read 5 => 3
[ 93.455367] wm8994-codec wm8994-codec: read 900 => 0
[ 93.460148] wm8994-codec wm8994-codec: read 4 => 200
[ 93.465032] wm8994-codec wm8994-codec: write 4 = 202
[ 93.470026] wm8994-codec wm8994-codec: 0x0004 <- 0x0202
[ 93.475346] wm8994-codec wm8994-codec: read 2 => 6000
[ 93.480221] wm8994-codec wm8994-codec: write 2 = 6240
[ 93.485254] wm8994-codec wm8994-codec: 0x0002 <- 0x6240
[ 93.490784] [zsb] late_disable_ev
[ 93.493950] wm8994-codec wm8994-codec: read 212 => 0
[ 93.498709] wm8994-codec wm8994-codec: SRC status: 0
[ 93.503678] [zsb] wm8994_set_bias_level: 3
[ 93.507737] wm8994-codec wm8994-codec: read 1 => 33
[ 93.512604] [zsb] wm8994_aif_mute id:1 mute:0
[ 93.516938] wm8994-codec wm8994-codec: read 420 => 200
[ 93.522114] wm8994-codec wm8994-codec: write 420 = 0
[ 93.527007] wm8994-codec wm8994-codec: 0x0420 <- 0x0000
[ 93.532384] wm8994-snd_pcm_lib_ioctl cmd 0x0
[ 93.536476] wm8994-soc_pcm_prepare
[ 93.539927] Entered idma_prepare start=0x02058000
[ 93.544706] wm8994-codec wm8994-codec: read 208 => a
[ 93.549899] wm8994-snd_pcm_capture_ioctl
[ 93.553568] wm8994-soc_pcm_trigger
[ 93.557025] Entered dma_trigger
[ 93.560163] wm8994-i2s_trigger cmd=1 capture=1,i2s->addr=0xefc9e000
[ 93.566409] wm8994-i2s_trigger I2SCON=0x8050ce53,I2SMOD=0xd0001900,I2SRXD=0x00000000
[ 93.574202] wm8994-snd_pcm_capture_ioctl
[ 93.578131] wm8994-snd_pcm_lib_read
[ 93.580051] wm8994-codec wm8994-codec: read 1 => 33
[ 93.580058] wm8994-codec wm8994-codec: write 1 = 333
[ 93.580064] wm8994-codec wm8994-codec: 0x0001 <- 0x0333
[ 93.596921] wm8994-snd_pcm_lib_read_transfer
[ 93.601079] wm8994-snd_pcm_lib_read_transfer
[ 93.605401] wm8994-codec wm8994-codec: read 60 => 0
[ 93.605405] wm8994-snd_pcm_lib_read_transfer
[ 93.605417] wm8994-snd_pcm_lib_read_transfer
[ 93.612894] wm8994-snd_pcm_lib_read_transfer
[ 93.613112] wm8994-snd_pcm_capture_ioctl
[ 93.613117] wm8994-snd_pcm_lib_read
[ 93.613126] wm8994-snd_pcm_lib_read_transfer
[ 93.635181] wm8994-codec wm8994-codec: write 60 = 22
[ 93.640111] wm8994-codec wm8994-codec: 0x0060 <- 0x0022
[ 93.645496] wm8994-codec wm8994-codec: read 4c => 1f25
[ 93.650440] wm8994-codec wm8994-codec: read 208 => a
[ 93.655399] wm8994-codec wm8994-codec: write 208 = 1a
[ 93.659331] wm8994-snd_pcm_lib_read_transfer
[ 93.659624] wm8994-snd_pcm_release
[ 93.659632] wm8994-soc_pcm_trigger
[ 93.659636] Entered dma_trigger
[ 93.659655] wm8994-i2s_trigger cmd=0 capture=1,i2s->addr=0xefc9e000
[ 93.681094] wm8994-codec wm8994-codec: 0x0208 <- 0x001a
[ 93.686451] wm8994-codec wm8994-codec: read 5 => 3
[ 93.691059] wm8994-codec wm8994-codec: write 5 = 303
[ 93.696020] wm8994-codec wm8994-codec: 0x0005 <- 0x0303
[ 93.701376] wm8994-codec wm8994-codec: read 5 => 303
[ 93.706387] wm8994-codec wm8994-codec: read 900 => 0
[ 93.711110] wm8994-codec wm8994-codec: read 5 => 303
[ 93.716260] wm8994-codec wm8994-codec: read 900 => 0
[ 93.721006] wm8994-codec wm8994-codec: read 5 => 303
[ 93.726155] wm8994-codec wm8994-codec: read 900 => 0
[ 93.730915] wm8994-codec wm8994-codec: read 5 => 303
[ 93.736057] wm8994-codec wm8994-codec: read 900 => 0
[ 93.740796] wm8994-codec wm8994-codec: read 5 => 303
[ 93.745966] wm8994-codec wm8994-codec: read 900 => 0
[ 93.750691] wm8994-codec wm8994-codec: read 5 => 303
[ 93.755839] wm8994-codec wm8994-codec: read 900 => 0
[ 93.760586] [zsb] dac_ev
[ 93.763090] wm8994-codec wm8994-codec: read 5 => 303
[ 93.768062] [zsb] dac_ev
[ 93.770568] wm8994-codec wm8994-codec: read 5 => 303
[ 93.775517] wm8994-codec wm8994-codec: read 3 => 0
[ 93.780302] wm8994-codec wm8994-codec: write 3 = 300
[ 93.785238] wm8994-codec wm8994-codec: 0x0003 <- 0x0300
[ 93.790670] wm8994-codec wm8994-codec: read 5 => 303
[ 93.795604] wm8994-codec wm8994-codec: read 900 => 0
[ 93.800341] wm8994-codec wm8994-codec: read 5 => 303
[ 93.805516] wm8994-codec wm8994-codec: read 900 => 0
[ 93.810237] wm8994-codec wm8994-codec: read 5 => 303
[ 93.815388] wm8994-codec wm8994-codec: read 900 => 0
[ 93.820133] wm8994-codec wm8994-codec: read 5 => 303
[ 93.825279] wm8994-codec wm8994-codec: read 900 => 0
[ 93.830040] wm8994-codec wm8994-codec: read 5 => 303
[ 93.835171] wm8994-codec wm8994-codec: read 900 => 0
[ 93.839908] wm8994-codec wm8994-codec: read 5 => 303
[ 93.845098] wm8994-codec wm8994-codec: read 900 => 0
[ 93.849805] wm8994-codec wm8994-codec: read 60 => 22
[ 93.854764] wm8994-codec wm8994-codec: read 4c => 1f25
[ 93.859898] wm8994-codec wm8994-codec: write 4c = 9f25
[ 93.865022] wm8994-codec wm8994-codec: 0x004c <- 0x9f25
[ 93.880031] wm8994-codec wm8994-codec: read 1 => 333
[ 93.880107] wm8994-codec wm8994-codec: write 60 = 22
[ 93.884320] wm8994-codec wm8994-codec: 0x0060 <- 0x0022
[ 93.889679] wm8994-codec wm8994-codec: read 55 => 401
[ 93.894568] wm8994-codec wm8994-codec: Using cached DC servo offset fbfb
[ 93.901237] wm8994-codec wm8994-codec: write 57 = fbfb
[ 93.906371] wm8994-codec wm8994-codec: 0x0057 <- 0xfbfb
[ 93.911725] wm8994-codec wm8994-codec: write 54 = f
[ 93.916440] wm8994-codec wm8994-codec: 0x0054 <- 0x000f
[ 93.921793] wm8994-codec wm8994-codec: Waiting for DC servo...
[ 93.935231] wm8994-codec wm8994-codec: read 54 => 3
[ 93.935305] wm8994-codec wm8994-codec: DC servo: 3
[ 93.939255] wm8994-codec wm8994-codec: write 60 = ee
[ 93.944195] wm8994-codec wm8994-codec: 0x0060 <- 0x00ee
[ 93.949574] wm8994-codec wm8994-codec: read 1 => 333
[ 93.954350] wm8994-codec wm8994-codec: write 1 = 3333
[ 93.959384] wm8994-codec wm8994-codec: 0x0001 <- 0x3333
[ 93.964761] [zsb] late_disable_ev
[ 93.968099] wm8994-codec wm8994-codec: read 212 => 0
[ 93.972837] wm8994-codec wm8994-codec: SRC status: 0
[ 93.977820] [zsb] wm8994_aif_mute id:1 mute:0
[ 93.982127] wm8994-codec wm8994-codec: read 420 => 0
[ 93.987075] wm8994-snd_pcm_lib_ioctl cmd 0x0
[ 93.987082] Entered dma_hw_free
[ 93.987106] Entered dma_close
[ 93.987193] wm8994-codec wm8994-codec: read 208 => 1a
[ 93.987549] wm8994-codec wm8994-codec: read 2 => 6240
[ 93.987555] wm8994-codec wm8994-codec: write 2 = 6000
[ 93.987561] wm8994-codec wm8994-codec: 0x0002 <- 0x6000
[ 93.987725] wm8994-codec wm8994-codec: read 4 => 202
[ 93.987730] wm8994-codec wm8994-codec: write 4 = 200
[ 93.987736] wm8994-codec wm8994-codec: 0x0004 <- 0x0200
[ 93.987897] wm8994-codec wm8994-codec: read 4 => 200
[ 93.987903] wm8994-codec wm8994-codec: write 4 = 0
[ 93.987909] wm8994-codec wm8994-codec: 0x0004 <- 0x0000
[ 93.988066] [zsb] late_disable_ev
[ 93.988272] wm8994-codec wm8994-codec: read 212 => 0
[ 93.988277] wm8994-codec wm8994-codec: SRC status: 0
[ 94.060961] wm8994-snd_pcm_lib_write
[ 94.064577] wm8994-snd_pcm_lib_write_transfer
[ 94.069362] wm8994-snd_pcm_lib_write
[ 94.072766] wm8994-snd_pcm_lib_write_transfer
[ 94.077304] wm8994-soc_pcm_trigger
[ 94.080552] Entered idma_trigger
[ 94.083772] wm8994-i2s_trigger cmd=1 capture=0,i2s->addr=0xefcb2000
[ 94.090270] wm8994-snd_pcm_lib_write
[ 94.093658] wm8994-snd_pcm_lib_write_transfer
[ 94.098399] wm8994-snd_pcm_lib_write
[ 94.102092] wm8994-snd_pcm_lib_write_transfer
[ 94.129519] wm8994-snd_pcm_lib_write
[ 94.129583] wm8994-snd_pcm_lib_write_transfer
[ 94.132253] wm8994-snd_pcm_lib_write_transfer
[ 94.136440] wm8994-snd_pcm_lib_write_transfer
................................................
[ 97.091836] wm8994-snd_pcm_lib_write
[ 97.091894] wm8994-snd_pcm_lib_write_transfer
[ 97.094403] wm8994-snd_pcm_lib_write_transfer
[ 97.098725] wm8994-snd_pcm_lib_write_transfer
[ 97.103158] wm8994-snd_pcm_lib_write_transfer
[ 97.107587] wm8994-snd_pcm_lib_write_transfer
[ 97.112147] wm8994-snd_pcm_release
[ 97.115472] wm8994-soc_pcm_trigger
[ 97.118926] Entered idma_trigger
[ 97.122141] wm8994-i2s_trigger cmd=0 capture=0,i2s->addr=0xefcb2000
[ 97.128414] Entered idma_hw_free
[ 97.131611] [zsb] wm8994_aif_mute id:1 mute:1
[ 97.135962] wm8994-codec wm8994-codec: read 420 => 0
[ 97.140897] wm8994-codec wm8994-codec: write 420 = 200
[ 97.146020] wm8994-codec wm8994-codec: 0x0420 <- 0x0200
[ 97.151405] Entered idma_close, prtd = d7cf9f40