On 02/10/2013 04:21 PM, Anil Kumar wrote:

Hi All,

I am working on Devkit8000 and adding DT support for that. I am trying to add sound DT node support for this boards. I have nearly done with this but facing issue on record. I do not have much knowledge of twl4030 audio codec but with small Hack[1] (as MainMic connected to the input jack) i am able to record sound on Devkit8000. I do not know that MICBIAS1_EN can be enable by amixer commands. Could you please help me to get out of this ?

You need to pass the routing information via DT for Devkit8000. This is not done for the BeagleBoard since it works without it (no need for MICBIAS for example)

1. Hack [1]

diff --git a/sound/soc/codecs/twl4030.c b/sound/soc/codecs/twl4030.c index 63b280b..6780681 100644 --- a/sound/soc/codecs/twl4030.c +++ b/sound/soc/codecs/twl4030.c @@ -1473,7 +1473,7 @@ static const struct snd_soc_dapm_widget twl4030_dapm_widgets[] = { SND_SOC_DAPM_SUPPLY("micbias2 select", TWL4030_REG_MICBIAS_CTL, 6, 0, NULL, 0),

•   SND_SOC_DAPM_MICBIAS("Mic Bias 1", TWL4030_REG_MICBIAS_CTL, 0, 0),
  

•   SND_SOC_DAPM_MICBIAS("Mic Bias 1", TWL4030_REG_MICBIAS_CTL, 0, 1),
  

Yes, this is HACK and it is wrong at the same time.

    SND_SOC_DAPM_MICBIAS("Mic Bias 2", TWL4030_REG_MICBIAS_CTL, 1, 0),
    SND_SOC_DAPM_MICBIAS("Headset Mic Bias", TWL4030_REG_MICBIAS_CTL, 2, 0),

2. Sound DT node patch for Devkit8000

diff --git a/arch/arm/boot/dts/omap3- devkit8000.dts b/arch/arm/boot/dts/omap3-devkit8000.dts index dc59272..5f3eec0 100644 --- a/arch/arm/boot/dts/omap3-devkit8000.dts +++ b/arch/arm/boot/dts/omap3-devkit8000.dts @@ -44,11 +44,22 @@ };

    };

•   sound {
  

•           compatible = "ti,omap-twl4030";
  

•           ti,model = "devkit8000";
  

•           ti,mcbsp = <&mcbsp2>;
  

•           ti,codec = <&twl_audio>;
  

Here you should have something like: ti,audio-routing = "Ext Spk", "PREDRIVEL", "Ext Spk", "PREDRIVER", "MAINMIC", "Main Mic", "Main Mic", "Mic Bias 1";

So you connect the MicBias1 to Main Mic. When you start playback MicBias1 will be turned on for you.

•   };
  

};

&omap3_pmx_core { pinctrl-names = "default";

•   pinctrl-0 = <&i2c1_pins>;
  

•   pinctrl-0 = <
  

•                   &i2c1_pins
  

•                   &mcbsp2_pins
  

•           >;
  
    leds_pins: pinmux_led_pins {
            pinctrl-single,pins = <
  

@@ -65,6 +76,21 @@ 0x18c 0x118 /* I2C1_SDA */ >; };

•   mcbsp2_pins: pinmux_mcbsp2_pins {
  

•            pinctrl-single,pins = <
  

•                   /*
  

•                    * MCBSP2_FSX, OMAP_MUX_MODE0 | OMAP_PIN_INPUT,
  

•                    * MCBSP2_CLKX, OMAP_MUX_MODE0 | OMAP_PIN_INPUT
  

•                    */
  

•                   0x10c 0x01000100
  

•                   /*
  

•                    * MCBSP2_DR, OMAP_MUX_MODE0 | OMAP_PIN_INPUT,
  

•                    * MCBSP2_DX, OMAP_MUX_MODE0 | OMAP_PIN_OUTPUT
  

•                    */
  

•                   0x110 0x00000100
  

•           >;
  

•   };
  

};

&i2c1 { @@ -74,6 +100,14 @@ reg = <0x48>; interrupts = <7>; /* SYS_NIRQ cascaded to intc */ interrupt-parent = <&intc>;

•           twl_audio: audio {
  

•                   compatible = "ti,twl4030-audio";
  

•                   codec {
  

•                           ti,ramp_delay_value = <3>;
  

•                           ti,offset_cncl_path = <0x31>;
  

•                   };
  

•           };
    };
  

};

3. Playback amixer commands amixer set 'PredriveR Mixer AudioR2' on amixer set 'PredriveL Mixer AudioL2' on amixer set PreDriv 100 unmute amixer set 'DAC2 Digital Fine' 100

Thanks, Anil