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停止对codec频繁开关，防止使用过程的pop音。

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This commit is contained in:
ChenJQ
2011-05-02 18:42:19 -07:00
parent 646f68c20c
commit 726e5e02fb
1 changed files with 23 additions and 10 deletions
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33
sound/soc/codecs/wm8900.c
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@@ -147,6 +147,8 @@
#define WM8900_LRC_MASK 0xfc00
#define SPK_CON RK29_PIN6_PB6
#define WM8900_NO_POWEROFF /* Do not close codec except suspend or poweroff */
#define WM8900_IS_SHUTDOWN 0
#define WM8900_IS_STARTUP 1
@@ -250,16 +252,16 @@ static void wm8900_set_hw(struct snd_soc_codec *codec)
{
u16 reg;
WM8900_DBG("Enter:%s, %d \n", __FUNCTION__, __LINE__);
if (wm8900_current_status & WM8900_IS_STARTUP)
return;
//snd_soc_write(codec, WM8900_REG_LOUT2CTL, 0x140);
//snd_soc_write(codec, WM8900_REG_ROUT2CTL, 0x140);
printk("Power up wm8900\n");
snd_soc_write(codec, WM8900_REG_HPCTL1, 0x30);
snd_soc_write(codec, WM8900_REG_POWER1, 0x0100);
snd_soc_write(codec, WM8900_REG_POWER3, 0x60);
snd_soc_write(codec, WM8900_REG_POWER1, 0x0101);
msleep(300);
msleep(400);
snd_soc_write(codec, WM8900_REG_POWER1, 0x0109);
snd_soc_write(codec, WM8900_REG_ADDCTL, 0x02);
snd_soc_write(codec, WM8900_REG_POWER1, 0x09);
@@ -310,6 +312,8 @@ static void wm8900_set_hw(struct snd_soc_codec *codec)
#ifdef SPK_CON
gpio_set_value(SPK_CON, GPIO_HIGH);
#endif
wm8900_current_status |= WM8900_IS_STARTUP;
}
static int wm8900_hw_params(struct snd_pcm_substream *substream,
@@ -693,13 +697,8 @@ static int wm8900_startup(struct snd_pcm_substream *substream,
cancel_delayed_work_sync(&delayed_work);
if (wm8900_current_status == WM8900_IS_SHUTDOWN) {
wm8900_set_hw(codec);
printk("Power up wm8900\n");
wm8900_set_hw(codec);
wm8900_current_status |= WM8900_IS_STARTUP;
}
return 0;
}
@@ -710,6 +709,10 @@ static void wm8900_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai_link *machine = rtd->dai;
struct snd_soc_dai *codec_dai = machine->codec_dai;
#ifdef WM8900_NO_POWEROFF
return; /* Let codec not going to power off for pop noise */
#endif
WM8900_DBG("Enter::%s----%d substream->stream:%s \n",__FUNCTION__,__LINE__,
substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? "PLAYBACK":"CAPTURE");
@@ -908,7 +911,9 @@ static int wm8900_suspend(struct platform_device *pdev, pm_message_t state)
cancel_delayed_work_sync(&delayed_work);
#ifdef WM8900_NO_POWEROFF
wm8900_powerdown();
#endif
/* Stop the FLL in an orderly fashion */
ret = wm8900_set_fll(codec, 0, 0, 0);
@@ -949,6 +954,10 @@ static int wm8900_resume(struct platform_device *pdev)
}
}
#ifdef WM8900_NO_POWEROFF
wm8900_set_hw(codec);
#endif
return 0;
}
@@ -1131,6 +1140,10 @@ static int wm8900_probe(struct platform_device *pdev)
return -ENOMEM;
}
#ifdef WM8900_NO_POWEROFF
wm8900_set_hw(codec);
#endif
return ret;
card_err: