Boris Brezillon <boris.brezillon@xxxxxxxxxxxxxxxxxx> writes: > Add a conf file for the VC4-HDMI sound card. > > Signed-off-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxxxxxxx> > --- > Hi, > > Sorry for the noise, but I didn't send this patch to the alsa-lib > maintainer on my first attempt. > > This patch is adding a card config file for the audio sound card whose > driver has been submitted here [1] (not accepted yet). > > Since I am a total newbie to the alsa world, I'd like to get some > feedback on this patch. > > Also, the card only supports 2 to 8 channels, and I wonder if we should > add a plug element to support mono streams, and where this element > should be added (after or before the iec958 element). > > Regards, > > Boris > > [1]https://www.spinics.net/lists/arm-kernel/msg565182.html The kernel driver is getting merged now. Tested-by: Eric Anholt <eric@xxxxxxxxxx> PulseAudio on the desktop seems to work fine. aplay at the console fails: aplay -v ~/LRMonoPhase4.wav Playing WAVE '/home/anholt/LRMonoPhase4.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo aplay: set_params:1297: Sample format non available Available formats: - IEC958_SUBFRAME_LE but if you specify iec958 it works: aplay -v -D iec958 ~/LRMonoPhase4.wav Playing WAVE '/home/anholt/LRMonoPhase4.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo IEC958 subframe conversion PCM (IEC958_SUBFRAME_LE) Its setup is: stream : PLAYBACK ... but if you specify a mono file it doesn't: anholt@rpi-open:/home/anholt% aplay -v -D iec958 /usr/share/sounds/alsa/Front_Left.wav Playing WAVE '/usr/share/sounds/alsa/Front_Left.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono aplay: set_params:1361: Unable to install hw params: ACCESS: RW_INTERLEAVED FORMAT: S16_LE SUBFORMAT: STD SAMPLE_BITS: 16 FRAME_BITS: 16 CHANNELS: 1 ...
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