Does anybody know how to port dmic on blaze without twl6040

Hello Allen,

The DMIC module has two types of clocks:

- DMIC_ABE_FCLK - Functional clock
- ABE_ICLK2 - Interface clock

The PRCM register CM1_ABE_DMIC_CLKCTRL[1:0] MODULEMODE - enable DMIC module.

This register CM1_ABE_DMIC_CLKCTRL - manages the DMIC clocks.

Mux DMIC_FCLK  - CM1_ABE_DMIC_CLKCTRL[25:24] CLKSEL_SOURCE - Selects the internal clock to be used as the functional clock in case CLKSEL_SOURCE selects the internal clock source as the functional clock source.

Mux DMIC_INT_FCLK  - CM1_ABE_DMIC_CLKCTRL[27:26] CLKSEL_INTERNAL_SOURCE - Selects the source of the functional clock between, internal source, CLKS pad and Audio SLIMBUS_CLK pad. The switching between the clocks is not guaranteed to be glitchless.

ABE DMIC Signal Group Parameter Controls to Different Interface I/O Pads Mapping:

CONTROL_SMART3IO_PADCONF_0[31:30]  DMIC_DR0_MB  - abe_dmic_clk1;
CONTROL_SMART3IO_PADCONF_2[31] DMIC_DR0_LB          - abe_dmic_din1;

I suggest using the following link with reference information about ABE subsystem: - http://www.omappedia.com/wiki/Audio_Drive_Arch

Beside board-sdp4430.c, you must apply changes in the following files:
- arch/arm/mach-omap2/ mux44xx.c

- sound/soc/omap/ omap-dmic.c

For more information about ABE Hardware abstraction layer. - http://focus.ti.com/pdfs/wtbu/OMAP4430_ES2%20x_4460_ES1%200_PUBLIC_TRM_Addendum_ABE_HAL_vC.pdf

Best regards,

Yanko

Hi, Yanko

Thanks for the response . I have definitely take a look at the link that you mentioned above.

but I have a question need you help to clarify that I don't layout twl6040 on board and

is it possible to bring up  DMIC ?  

Thanks!

Allen

Allen,

It is possible to use DMIC without  TWL6040. I already said how must configure your clock signal to DMIC module.

To activate DMIC module, you must configure its power state in ON State. For this purpose use register PM_ABE_PWRSTCTRL[1:0] POWERSTATE - 0x3 - Power state control
This register controls the ABE domain power state to reach upon a domain sleep transition.

However, you must present more details about your use case with DMIC module. If you want our support.

Best regards,

Yanko

Hi, Yanko

Thanks for your support, and I have completed NO-twl6040 version.

Then we continue to try another board which has twl6040, (omap4460+twl6040 blaze version)

but met the same issue (NO sound) when testing by using tinycap

The DMIC I have is one R-channel connected to abe_dmic_din1 and use abe_dmic_clk1.

when I type

#tinymix 48 2

#tinymix 49 2

#tinycap /data/001.wav -D 0 -d 1 -c 1 -r 48000

it record successfully but no sound when I play it on PC by VLC (plays successfully)

I have checked there is data in test.wav.

Could you support me or offer other commands? my information is below.

shell@android:/ # tinymix
Number of controls: 75

ctl type num name value

0 ENUM 1 DL1 Equalizer Flat response
1 ENUM 1 Sidetone Equalizer Flat response
2 ENUM 1 AMIC Equalizer High-pass 0dB
3 ENUM 1 DMIC Equalizer High-pass 0dB
4 INT 1 DL1 Media Playback Volume 0
5 INT 1 DL1 Tones Playback Volume 0
6 INT 1 DL1 Voice Playback Volume 0
7 INT 1 DL1 Capture Playback Volume 0
8 INT 1 VXREC Media Volume 0
9 INT 1 VXREC Tones Volume 0
10 INT 1 VXREC Voice DL Volume 0
11 INT 1 VXREC Voice UL Volume 0
12 INT 1 Echo DL1 Volume 0
13 INT 1 Echo DL2 Volume 0
14 INT 1 AUDUL Media Volume 0
15 INT 1 AUDUL Tones Volume 0
16 INT 1 AUDUL Voice UL Volume 120
17 INT 1 AUDUL Voice DL Volume 0
18 INT 1 SDT UL Volume 0
19 INT 1 SDT DL Volume 120
20 INT 2 DMIC1 UL Volume 120 120
21 INT 2 DMIC2 UL Volume 120 120
22 INT 2 DMIC3 UL Volume 120 120
23 INT 2 AMIC UL Volume 120 120
24 INT 2 BT UL Volume 120 120
25 BOOL 1 DL1 Mono Mixer Off
26 BOOL 1 AUDUL Mono Mixer Off
27 BOOL 1 DL1 MM_EXT Switch Off
28 BOOL 1 DL1 BT_VX Switch Off
29 BOOL 1 DL1 PDM_DL2 Switch Off
30 BOOL 1 DL1 PDM Switch Off
31 BOOL 1 Echo Mixer DL1 Off
32 BOOL 1 Echo Mixer DL2 Off
33 BOOL 1 Sidetone Mixer Capture Off
34 BOOL 1 Sidetone Mixer Playback Off
35 BOOL 1 Capture Mixer Tones Off
36 BOOL 1 Capture Mixer Voice Playback Off
37 BOOL 1 Capture Mixer Voice Capture Off
38 BOOL 1 Capture Mixer Media Playback Off
39 BOOL 1 Voice Capture Mixer Tones Playback Off
40 BOOL 1 Voice Capture Mixer Media Playback Off
41 BOOL 1 Voice Capture Mixer Capture Off
42 BOOL 1 DL1 Mixer Tones Off
43 BOOL 1 DL1 Mixer Voice Off
44 BOOL 1 DL1 Mixer Capture Off
45 BOOL 1 DL1 Mixer Multimedia Off
46 ENUM 1 MUX_VX1 None
47 ENUM 1 MUX_VX0 None
48 ENUM 1 MUX_UL11 DMic0R
49 ENUM 1 MUX_UL10 DMic0R
50 ENUM 1 MUX_UL05 None
51 ENUM 1 MUX_UL04 None
52 ENUM 1 MUX_UL03 None
53 ENUM 1 MUX_UL02 None
54 ENUM 1 MUX_UL01 None
55 ENUM 1 MUX_UL00 None
56 INT 2 Capture Preamplifier Volume 1 1
57 INT 2 Capture Volume 0 0
58 INT 2 Aux FM Volume 0 0
59 INT 2 Headset Playback Volume 0 0
60 INT 2 Handsfree Playback Volume 0 0
61 INT 1 Earphone Playback Volume 0
62 ENUM 1 Headset Power Mode Low-Power
63 ENUM 1 PLL Selection Low-Power
64 BOOL 1 AUXR Playback Switch Off
65 BOOL 1 AUXL Playback Switch Off
66 BOOL 1 Earphone Playback Switch Off
67 ENUM 1 Vibra Right Playback Input FF
68 ENUM 1 Vibra Left Playback Input FF
69 ENUM 1 Headset Right Playback Off
70 ENUM 1 Headset Left Playback Off
71 ENUM 1 Handsfree Right Playback Off
72 ENUM 1 Handsfree Left Playback Off
73 ENUM 1 Analog Right Capture Route Off
74 ENUM 1 Analog Left Capture Route Off

Thanks!