Re: [alsa-devel] audio mcbsp1 broken for beagleboard-xm -OMAP

21 Feb 2015


      On Fri, Feb 20, 2015 at 8:27 AM, Peter Ujfalusi peter.ujfalusi@ti.com wrote:
...
On 02/20/2015 08:45 AM, noman pouigt wrote:
...
Hello,
I am trying to integrate max98090 codec with $subject board.  I am
running the mcBSP in slave mode as i have not changed the hw_parms for
omap-twl4030.c file. With below changes i see wait_for_avail is
getting stuck i.e. mcbsp is not getting any interrupt and nothing is
playing.
Kernel version:
VERSION = 3
PATCHLEVEL = 19
SUBLEVEL = 0
EXTRAVERSION =
NAME = Diseased Newt
Setup information:
Using beagle board -xm and connected max98090 codec to mcbsp1 pins.
Connected only 4 pins.
Changed the omap-twl4030.c machine file as below to disable the twl4030:
static struct snd_soc_dai_link omap_twl4030_dai_links[] = {
       {

          .name = "max98090",


          .stream_name = "max98090",
         .cpu_dai_name = "omap-mcbsp.1",


          .codec_dai_name = "HiFi",
         .platform_name = "omap-mcbsp.1",


          .codec_name = "max98090.1-0010",
         .ops = &omap_twl4030_ops,
 },


DTSI file change:arch/arm/boot/dts/omap3-beagle-xm.dts
&i2c2 {
       clock-frequency = <400000>;


  max98090: max98090@10 {


          compatible = "maxim,max98090";


          reg = <0x10>;


  };


};
You also need to change the dts file's sound node, enable mcbsp1, set the
pinctrl entries, etc if you boot with DT.
Yes and it is done as below:
&omap3_pmx_core {
        mcbsp1_pins: pinmux_mcbsp1_pins {
                pinctrl-single,pins = <
                        OMAP3_CORE1_IOPAD(0x2198, PIN_INPUT | MUX_MODE0)
                        OMAP3_CORE1_IOPAD(0x2194, PIN_INPUT | MUX_MODE0)
                        OMAP3_CORE1_IOPAD(0x2190, PIN_INPUT | MUX_MODE0)
                        OMAP3_CORE1_IOPAD(0x2190, PIN_OUTPUT | MUX_MODE0)
                >;
        };
}
sound {
-               ti,mcbsp = <&mcbsp2>;
-               ti,codec = <&twl_audio>;
+               ti,mcbsp = <&mcbsp1>;
+               ti,codec = <&max98090>;
        }
&mcbsp1 {
        pinctrl-names = "default";
        pinctrl-0 = <&mcbsp1_pins>;
status = "okay";
};
&i2c2 {
      clock-frequency = <400000>;
max98090: max98090@10 {
               compatible = "maxim,max98090";
               reg = <0x10>;
       };
 };
all other changes remain the same. Have i done muxing wrong? I am
still stuck with mcbsp not getting interrupt.
please find the dts file here http://ideone.com/TPFkBv
I connected digital output of 98090 to mcbsp1_dr and digital receive
to mcbsp1_dx. I can see the bit clock and lrclk is coming fine from
98090. As already mentioned i have connected lrclk, bit clock, DR
and DX only.
Kernel logs here: http://ideone.com/hDHq2l
...
...
omap/omap-twl4030.c
added in hw_params below function to set internal oscillator for 98090
for generating PLL for master clock.
snd_soc_dai_set_sysclk(codec_dai, 26000000, 0, SND_SOC_CLOCK_IN);
I am able to see that the cpu_dai is mapped with codec_dai and
configuration is ok. kernel logs at https://ideone.com/oezNSj
I think i don't need to configure the mcbsp1 pins right as it uses default.
Please guide me.I have tried IRC channel also but not getting the right folks.
https://github.com/CircuitCo/BeagleBoard-xM-RevC/blob/master/BeagleBoard-xM_...
Thanks,
--
Péter