On Apr 18, 2016, at 08:36 , Peter Ujfalusi peter.ujfalusi@ti.com wrote:
On 04/04/2016 11:59 AM, Rick Mann wrote:
I've got a Beaglebone Green with a custom cape (CODEC and amp and some other stuff).
Kernel 4.4.6-bone-rt-r6. When I load the overlay that should set up my CODEC in the device tree, I get the following in the log.
[ 367.172337] davinci-mcasp 48038000.mcasp: stream has more channels (2) than are enabled in mcasp (0) [ 367.172374] davinci-mcasp 48038000.mcasp: ASoC: can't set 48038000.mcasp hw params: -22
You can see a little more log context, along with the DTS, here:
Can anyone tell me what this means? Thanks!
The fragment mostly looks OK, but am335x have 4 serializers, not 16 and the num-serializer is deprecated at least in upstream kernel.
Something goes wrong when the McASP is loaded for sure, some parameters did not got updated via DT perhaps, or most likely the DT fragment is loaded after the McASP is loaded. Can you print out: slots, max_active_serializers, active_serializers and channels in mcasp_common_hw_param() function? Also just in case, can you put a dev_err() print in davinci_mcasp_probe() to see when the driver is loaded compared to the time when the fragment is loaded?
If McASP is built in, try to build it as module and load the audio modules after the DT fragments are handled.
Thanks for the suggestions, Peter, I really appreciate the help. Here's what I get:
[ 256.743991] davinci-mcasp 48038000.mcasp: Slots: 2, max_active_serializers: 1, active_serializers: 0, channels: 2
I rebuilt the 4.4.7-bone-rt-r9 kernel using Robert C Nelson's bb-kernel repo scripts. I modified sound/soc/davinci/davinci-mcasp.c to print some diagnostics. Rebooted, then executed the following. Note that BB-BONE-AUDI-02.dts is https://github.com/RobertCNelson/bb.org-overlays/blob/master/src/arm/BB-BONE-AUDI-02-00A0.dts, and the base DTB is http://pastebin.com/5vVEdAKt:
$ sudo su # echo BB-BONE-AUDI-02 > $SLOTS # aplay -l **** List of PLAYBACK Hardware Devices **** card 0: B [AudioCape Rev B], device 0: davinci-mcasp.0-tlv320aic3x-hifi tlv320aic3x-hifi-0 [] Subdevices: 1/1 Subdevice #0: subdevice #0 # speaker-test
speaker-test 1.0.28
Playback device is default Stream parameters are 48000Hz, S16_LE, 1 channels Using 16 octaves of pink noise Rate set to 48000Hz (requested 48000Hz) Buffer size range from 16 to 32768 Period size range from 8 to 16384 Using max buffer size 32768 Periods = 4 Unable to set hw params for playback: Invalid argument Setting of hwparams failed: Invalid argument
speaker-test caused the following to be logged:
[ 256.743991] davinci-mcasp 48038000.mcasp: Slots: 2, max_active_serializers: 1, active_serializers: 0, channels: 2 [ 256.754343] davinci-mcasp 48038000.mcasp: ASoC: can't set 48038000.mcasp hw params: -22
Full logs: