I have the same issue.
I am running kernel debian with kernel 4.4.52-bone16
I pulled down RobertCNelson's dtb-rebuilder from
branch 4.4.x and rebuilt all the arm dtbs and installed them.
Then added then updated my *base* dtb, which
is am335x-boneblack-emmc-overlay.dtb with the clock definitions
Reboot, then install the audio: sudo sh -c "echo BB-BONE-AUDI-02 >
All seems ok in dmesg:
[ 411.768801] bone_capemgr bone_capemgr: part_number 'BB-BONE-AUDI-02',
[ 411.768866] bone_capemgr bone_capemgr: slot #4: override
[ 411.774250] bone_capemgr bone_capemgr: Using override eeprom data at
[ 411.774295] bone_capemgr bone_capemgr: slot #4: 'Override Board
[ 411.811080] bone_capemgr bone_capemgr: slot #4: dtbo
'BB-BONE-AUDI-02-00A0.dtbo' loaded; overlay id #0
but speaker-test and aplay both fail with:
[ 2632.788052] davinci-mcasp 48038000.mcasp: stream has more channels (2)
than are enabled in mcasp (0)
[ 2632.788110] davinci-mcasp 48038000.mcasp: ASoC: can't set 48038000.mcasp
hw params: -22
On Wednesday, July 19, 2017 at 12:21:09 PM UTC-4, engka...@gmail.com wrote:
> This might be an old thread but I got a question. I was able to compile
> and load the modified device tree. I then loaded my overlay for the audio.
> I built this circuit base from http://elinux.org/CircuitCo:Audio_Cape_RevB.
> The only difference with mine is that I am using I2C1. I can see the it is
> using address 0x18 dmesg has:
> [ 135.176315] asoc-simple-card sound: tlv320aic3x-hifi <-> 48038000.mcasp
> mapping ok
> However, when I call on the speaker-test, this error appears:
> Unable to set hw params for playback: Invalid argument
> Setting of hwparams failed: Invalid argument
> Checking dmesg:
> [ 617.051387] davinci-mcasp 48038000.mcasp: stream has more channels (2)
> than are enabled in mcasp (0)
> [ 617.051781] davinci-mcasp 48038000.mcasp: ASoC: can't set
> 48038000.mcasp hw params: -22
> Has anyone encountered the same problem?
> On Monday, April 4, 2016 at 5:48:01 PM UTC+8, Rick M wrote:
>> I'm trying to get my audio cape to work (which is nearly identical to the
>> cape that was available for sale). I've had it working to some level of
>> success with past kernels (3.1.18), but now I'm on 4.4.6. My existing DTS
>> didn't work, so I'm looking at how the BB-BONE-AUDI-02 DTS is written.
>> One of the differences is that it doesn't explicitly call out the McASP
>> clock frequency like the older one did. Instead, it seems to refer to
>> clk_mcasp0. But when I copy the same code into my DTS, I get:
>> [ 103.180866] of_resolve_phandles: Could not find symbol 'clk_mcasp0'
>> [ 103.187269] bone_capemgr bone_capemgr: slot #4: Failed to resolve tree
>> I found it defined by grepping /boot/dtbs. It's in
>> /boot/dtbs/4.4.6-bone-rt-r6/am335x-abbbi.dtb. Where can I find the source
>> files for these DTBs?
>> Is this dtb part of what's loaded by default in 4.4.6-bone-rt-r6? If not,
>> can I copy the definition into my
>> FWIW, here's my DTS and some output from dmesg:
>> Rick Mann
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