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DMIC does not work with ICS 4I1.7 release

Anuroop Jesu
Intellectual 415 points

Hi there,

I gone through the various topics on the e2e for testing the DMIC on blaze board 4470 with ics android kernel and file system.

I have selected using tinymix

MUX_UL01    = DMic0L/DMic1L
MUX_UL00    = DMic0R/DMic1R

and MM_UL

and using the tinycap did captured.

tinycap /data/filecapdmic.wav -d 0 -b 32 -c 2 -r 48000

This works and stopped using Ctrl^C.

When played that by tinyplay, I don't here anything. When opend with Audacity I see nothing. So I was wondering how to test  DMIC on blaze board.

Regards

Anuroop



  • 0
    TI__Expert 5515 points

    Hi Jesu,

    The problem is because an usb configuration on the machine file is changing some pin muxing of the dmic. Try this change and now it should work:

    diff --git a/arch/arm/mach-omap2/board-4430sdp.c b/arch/arm/mach-omap2/board-4430sdp.c
    --- a/arch/arm/mach-omap2/board-4430sdp.c
    +++ b/arch/arm/mach-omap2/board-4430sdp.c
    @@ -1028,7 +1028,7 @@ static void omap4_sdp4430_wifi_init(void)
     #if defined(CONFIG_USB_EHCI_HCD_OMAP) || defined(CONFIG_USB_OHCI_HCD_OMAP3)
     struct usbhs_omap_board_data usbhs_bdata __initdata = {
            .port_mode[0] = OMAP_EHCI_PORT_MODE_PHY,
    -       .port_mode[1] = OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0,
    +       .port_mode[1] = OMAP_USBHS_PORT_MODE_UNUSED,
            .port_mode[2] = OMAP_USBHS_PORT_MODE_UNUSED,
            .phy_reset  = false,
            .reset_gpio_port[0]  = -EINVAL,

  • 0 in reply to Israel Cepeda
    Intellectual 415 points

    Hi Ice,

    Thanks for information. Sorry I should have posted and closed this, I could figure out that and DMIC1, DMIC3 works on blaze4470 ICS 4AI1.7.

    I disabled the same.

    Regards

    Anuroop