EDMA傳輸沒有進入callback funtion?(AM335X, Mcasp0, 2TX, 2RX)

YW Jiang

Prodigy 100 points

Other Parts Discussed in Thread: LM49350

硬體環境：

定制一塊3358(zch package)的板子

透過mcasp0與兩個lm49350相接

codec1:

TX:axr3

RX:axr4

codec2:

TX:axr0

RX:axr1

問題：

1.單顆codec(1TX, 1RX)測試下

dma傳輸並沒有發生? 沒有進入davinci-pcm.c, davinci_pcm_dma_irq()

CLK部份:

MCLK : 12MHz

SCLK : 1.5MHz

LRCK : 48kHz

改了am335x_evm_snd_data1中的.asp_chan_q

全部的number, 只有EVENTQ_0能讓DMA傳輸就能正常運作

但是不知道為什麼會這樣? 不知道哪些可能的因素會造成這樣?

2.在davinci-pcm.c中的davinci_pcm_dma_request()

      ret = prtd->asp_channel = edma_alloc_channel(params->channel,
           davinci_pcm_dma_irq, substream,
           prtd->params->asp_chan_q);

params->channel 印出來的值為9,

若仿照edma_test.c中將params->channel改成EDMA_CHANNEL_ANY

則無法進入callback funtion - davinci_pcm_dma_irq()

是因為有些dma channel是保留做特殊用途嗎?

3.最終我們要實現的是2TX, 2RX

但是目前在2TX, 2RX下, DMA的傳輸無法運作, 一次都沒有進入davinci_pcm_dma_irq()

以下是我們目前有修改的部分, 但始終無法正確傳輸

能否提供些能讓driver能支援mutil channel的方向

相關修改:

>>board-am335xevm.c

/* Module pin mux for mcasp0 */

static struct pinmux_config mcasp0_pin_mux[] = {

     {"mcasp0_ahclkx.mcasp0_ahclkx", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT},

     {"mcasp0_aclkx.mcasp0_aclkx", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT},

     {"mcasp0_fsx.mcasp0_fsx", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT},

// codec 1

     {"mcasp0_axr0.mcasp0_axr0", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT}, // D12

     {"mcasp0_axr1.mcasp0_axr1", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLDOWN}, // D13

// codec 2

{"mcasp0_ahclkr.mcasp0_axr2", OMAP_MUX_MODE2 | AM33XX_PIN_OUTPUT}, // C12

{"mcasp0_fsr.mcasp0_axr3", OMAP_MUX_MODE2 | AM33XX_PIN_INPUT_PULLDOWN}, // C13

     {NULL, 0},

};

static u8 am335x_iis_serializer_direction1[] = {
//INACTIVE_MODE,     INACTIVE_MODE,     TX_MODE,     RX_MODE,     // codec1
//TX_MODE,     RX_MODE,     INACTIVE_MODE,     INACTIVE_MODE,     // codec2

  TX_MODE,     RX_MODE,     TX_MODE,     RX_MODE,                 // codec1, 2

  INACTIVE_MODE,     INACTIVE_MODE,     INACTIVE_MODE,     INACTIVE_MODE,

  INACTIVE_MODE,     INACTIVE_MODE,     INACTIVE_MODE,     INACTIVE_MODE,

  INACTIVE_MODE,     INACTIVE_MODE,     INACTIVE_MODE,     INACTIVE_MODE,

};

static struct snd_platform_data am335x_evm_snd_data1 = {

     .tx_dma_offset     = 0x46000000,     /* McASP0 0x46000000 */

     .rx_dma_offset     = 0x46000000,

     .op_mode     = DAVINCI_MCASP_IIS_MODE,

     .num_serializer     = ARRAY_SIZE(am335x_iis_serializer_direction1),

     .tdm_slots     = 2,

     .serial_dir     = am335x_iis_serializer_direction1,

    .asp_chan_q     = EVENTQ_0,

//.asp_chan_q     = EVENTQ_1,         //=> x

//.asp_chan_q     = EVENTQ_2,       //=> x

//.asp_chan_q     = EVENTQ_3,       => x

//.asp_chan_q     = EVENTQ_DEFAULT, => x

     .version     = MCASP_VERSION_3,

// .txnumevt     = 1, // single code 1 TX

// .rxnumevt     = 1, // single code 1 RX

    .txnumevt     = 2,

.rxnumevt     = 2,

};

錯誤訊息:

/ # aplay -D"hw:0,0" -r16000 -traw -fS16_LE -c1 c304-2_48k_16bits_stereo_49s.wav

[   53.275665] Trace davinci-pcm.c: davinci_pcm_open
[   53.280670] Trace davinci-pcm.c: davinci_pcm_dma_request : prtd->asp_channel:8, prtd->params->asp_chan_q=0, prtd->asp_link[0]=191
Playing WAVE 'c304-2_48k_16bits_stereo_49s.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo
[   53.398864] Trace davinci-pcm.c: davinci_pcm_prepare
[   53.467315] pcm_lib: transfer 8192 bytes, runtime->dma_bytes = 131072, runtime->dma_addr = 8f100000, runtime->dma_area = ffda0000, frames_to_bytes(runtime, hwoff) = 0, hwbuf = ffda0000
[   53.487030] pcm_lib: transfer 8192 bytes, runtime->dma_bytes = 131072, runtime->dma_addr = 8f100000, runtime->dma_area = ffda0000, frames_to_bytes(runtime, hwoff) = 2000, hwbuf = ffda2000
[   53.560485] pcm_lib: transfer 8192 bytes, runtime->dma_bytes = 131072, runtime->dma_addr = 8f100000, runtime->dma_area = ffda0000, frames_to_bytes(runtime, hwoff) = 4000, hwbuf = ffda4000
[   53.582000] pcm_lib: transfer 8192 bytes, runtime->dma_bytes = 131072, runtime->dma_addr = 8f100000, runtime->dma_area = ffda0000, frames_to_bytes(runtime, hwoff) = 6000, hwbuf = ffda6000
[   53.601409] pcm_lib: transfer 8192 bytes, runtime->dma_bytes = 131072, runtime->dma_addr = 8f100000, runtime->dma_area = ffda0000, frames_to_bytes(runtime, hwoff) = 8000, hwbuf = ffda8000
[   53.661102] pcm_lib: transfer 8192 bytes, runtime->dma_bytes = 131072, runtime->dma_addr = 8f100000, runtime->dma_area = ffda0000, frames_to_bytes(runtime, hwoff) = a000, hwbuf = ffdaa000
[   53.680847] pcm_lib: transfer 8192 bytes, runtime->dma_bytes = 131072, runtime->dma_addr = 8f100000, runtime->dma_area = ffda0000, frames_to_bytes(runtime, hwoff) = c000, hwbuf = ffdac000
[   53.701324] pcm_lib: transfer 8192 bytes, runtime->dma_bytes = 131072, runtime->dma_addr = 8f100000, runtime->dma_area = ffda0000, frames_to_bytes(runtime, hwoff) = e000, hwbuf = ffdae000
[   53.774719] pcm_lib: transfer 8192 bytes, runtime->dma_bytes = 131072, runtime->dma_addr = 8f100000, runtime->dma_area = ffda0000, frames_to_bytes(runtime, hwoff) = 10000, hwbuf = ffdb0000
[   53.794219] pcm_lib: transfer 8192 bytes, runtime->dma_bytes = 131072, runtime->dma_addr = 8f100000, runtime->dma_area = ffda0000, frames_to_bytes(runtime, hwoff) = 12000, hwbuf = ffdb2000
[   53.853851] pcm_lib: transfer 8192 bytes, runtime->dma_bytes = 131072, runtime->dma_addr = 8f100000, runtime->dma_area = ffda0000, frames_to_bytes(runtime, hwoff) = 14000, hwbuf = ffdb4000
[   53.874481] pcm_lib: transfer 8192 bytes, runtime->dma_bytes = 131072, runtime->dma_addr = 8f100000, runtime->dma_area = ffda0000, frames_to_bytes(runtime, hwoff) = 16000, hwbuf = ffdb6000
[   53.893951] pcm_lib: transfer 8192 bytes, runtime->dma_bytes = 131072, runtime->dma_addr = 8f100000, runtime->dma_area = ffda0000, frames_to_bytes(runtime, hwoff) = 18000, hwbuf = ffdb8000
[   53.949310] pcm_lib: transfer 8192 bytes, runtime->dma_bytes = 131072, runtime->dma_addr = 8f100000, runtime->dma_area = ffda0000, frames_to_bytes(runtime, hwoff) = 1a000, hwbuf = ffdba000
[   53.973114] pcm_lib: transfer 8192 bytes, runtime->dma_bytes = 131072, runtime->dma_addr = 8f100000, runtime->dma_area = ffda0000, frames_to_bytes(runtime, hwoff) = 1c000, hwbuf = ffdbc000
[   53.994262] pcm_lib: transfer 8192 bytes, runtime->dma_bytes = 131072, runtime->dma_addr = 8f100000, runtime->dma_area = ffda0000, frames_to_bytes(runtime, hwoff) = 1e000, hwbuf = ffdbe000
[   54.011962] Trace davinci-pcm.c: davinci_pcm_trigger [start]
[   54.017913] Trace davinci-mcasp.c: davinci_mcasp_trigger
[   54.023498] Trace davinci-mcasp.c: davinci_mcasp_start
[   54.028900] Trace davinci-mcasp.c: mcasp_start_tx
aplay: pcm_write:1939: write error: Input/output error

[ 64.070800] Trace davinci-mcasp.c: davinci_mcasp_trigger
[ 64.077667] Trace davinci-mcasp.c: mcasp_stop_tx
/ #

12 年多前

0 ERIC1 12 年多前

Prodigy 30 points

Jiang,你这个问题，解决了吗？我也正准备使用一个McASP接两个CODEC，如您已解决，能给相关的一些建议吗？我邮箱是gzwader@163.com,谢了！

0 Yaoming Qin 12 年多前回复 ERIC1

TI__Mastermind 35157 points

ERIC1 说：

Jiang,你这个问题，解决了吗？我也正准备使用一个McASP接两个CODEC，如您已解决，能给相关的一些建议吗？我邮箱是gzwader@163.com,谢了！

请问您运行的os是linux么？如果是，软件已经做好了

0 leo chen 12 年多前回复 Yaoming Qin

Mastermind 9486 points

有没有关于EDMA的一些设计资料，最近在关注GPMC接口的DMA传输

0 ERIC1 12 年多前回复 Yaoming Qin

Prodigy 30 points

Yaoming,非常感谢你的的回复，我这边运行的OS是LINUX，用一个McASP接两个CODEC，也就是一个MCASP当作两个I2S总线使用，如果软件已做好了，能否给一些建议呢？或着内核版本是多少，我找了些资料也没有找到相关的介绍，例如如下参数该如何修改。

static u8 am335x_iis_serializer_direction0[] = {
TX_MODE, INACTIVE_MODE, RX_MODE, INACTIVE_MODE,
INACTIVE_MODE, INACTIVE_MODE, INACTIVE_MODE, INACTIVE_MODE,
INACTIVE_MODE, INACTIVE_MODE, INACTIVE_MODE, INACTIVE_MODE,
INACTIVE_MODE, INACTIVE_MODE, INACTIVE_MODE, INACTIVE_MODE,
};
这个我知道应改成：

static u8 am335x_iis_serializer_direction0[] = {
TX_MODE, RX_MODE, TX_MODE, RX_MODE,
INACTIVE_MODE, INACTIVE_MODE, INACTIVE_MODE, INACTIVE_MODE,
INACTIVE_MODE, INACTIVE_MODE, INACTIVE_MODE, INACTIVE_MODE,
INACTIVE_MODE, INACTIVE_MODE, INACTIVE_MODE, INACTIVE_MODE,
};

但后面的不知道如何修改？

static struct snd_platform_data am335x_evm_snd_data0 = {
.tx_dma_offset = 0x46000000, /* McASP0 */
.rx_dma_offset = 0x46000000,
.op_mode = DAVINCI_MCASP_IIS_MODE,
.num_serializer = ARRAY_SIZE(am335x_iis_serializer_direction0),
.tdm_slots = 2,
.serial_dir = am335x_iis_serializer_direction0,
.asp_chan_q = EVENTQ_2,
.version = MCASP_VERSION_3,
.txnumevt = 1,
.rxnumevt = 1,
};

：sound/soc/davinci/davinci-evm.c
static struct snd_soc_dai_link am335x_evm_dai = {
.name = "TLV320AIC3X",
.stream_name = "AIC3X",
.cpu_dai_name = "davinci-mcasp.0", //1-->0
.codec_dai_name = "tlv320aic3x-hifi",
.codec_name = "tlv320aic3x-codec.3-001b", //2-->1
.platform_name = "davinci-pcm-audio",
.init = evm_aic3x_init,
.ops = &evm_ops,
};

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EDMA傳輸沒有進入callback funtion?(AM335X, Mcasp0, 2TX, 2RX)