On Tue, 03 Oct 2017 19:23:04 +0200,
Axel Holzinger wrote:
>
> On Thursday, June 8, 2017 10:40 AM Takashi Iwai wrote:
>
> > On Thu, 08 Jun 2017 10:15:34 +0200,
> > Axel Holzinger wrote:
> > >
> > > On Tuesday, June 6, 2017 8:27 PM Takashi Iwai wrote:
> > > > On Mon, 05 Jun 2017 11:49:53 +0200,
> > > > Axel Holzinger wrote:
> > > > >
> > > > > Hi,
> > > > >
> > > > > I'm trying to get a RME HDSPe MADI card to run in an ARM box with
> > Linux
> > > > > 4.1.6. I configured the (vendor specific TI) kernel to support the
> card
> > > (via
> > > > > hdspm) compiled into the kernel (not as loadable module).
> > > > >
> > > > > The MADI card is detected as a PCI device and the ALSA driver is
> loaded.
> > > > > Unfortunately playout does NOT work: aplay is reporting an error:
> > > > > ALSA lib pcm_mmap.c:374:(snd_pcm_mmap) mmap failed: No such
> > device
> > > > or
> > > > > address
> > > >
> > > > Hm, this sounds odd. But the line doesn't really correspond to the
> > > > latest version of alsa-lib. Could you try to upgrade to the latest
> > > > version? Otherwise it's hard to debug.
> > >
> > > I installed ALSA with Debian apt-get. How would I update to a newer
> > version?
> >
> > Compiling by yourself?
> > alsa-lib has very few dependency, so it should be easy.
> >
> > > > > strace:
> > > > > open("/dev/snd/pcmC0D0p", O_RDWR|O_NONBLOCK|O_CLOEXEC) =
> > 4
> > > > > fcntl64(4, F_SETFD, FD_CLOEXEC) = 0
> > > > > ioctl(4, AGPIOC_ACQUIRE or APM_IOC_STANDBY or
> > > > SNDRV_PCM_IOCTL_INFO,
> > > > > 0xbecdfb64) = 0
> > > > > fcntl64(4, F_GETFL) = 0x802 (flags
> > > O_RDWR|O_NONBLOCK)
> > > > > ioctl(4, AGPIOC_INFO or SNDRV_PCM_IOCTL_PVERSION, 0xbecdfacc) =
> > 0
> > > > > ioctl(4, AGPIOC_SETUP or SNDRV_PCM_IOCTL_TTSTAMP, 0xbecdfad4)
> > = 0
> > > > > mmap2(NULL, 4096, PROT_READ, MAP_SHARED, 4, 0x80000000) = -1
> > ENXIO
> > > > (No such
> > > > > device or address)
> > > >
> > > > This error is expected and should be OK. It's an mmap of
> > > > status/control page, and this isn't supported on ARM, thus the kernel
> > > > returns -ENXIO. alsa-lib then falls back to the normal ioctl instead
> > > > of status/control mmap.
> > >
> > > Okay, got it. So is the mmap emulation plugin via asound.conf suggested
> by
> > > Anders needed then anyhow?
> >
> > It's irrelevant with the mmap emulation.
> >
> > > > But the ring-buffer mmap is supported as normal on ARM for MADI
> > > > driver, at least. MADI provides the SG-buffer that is mappable via
> > > > DMA coherent pages, and it should work on most of archs as is.
> > >
> > > Well I found out something more: If I don't give a "--device" parameter
> to
> > > aplay and the RME card is default, then audio is playing. But I give the
> "
> > > --device=default:CARD=HDSPMx5c74" then the error is occuring. That
> > doesn't
> > > make sense to me at all. The tests made were with the asound.conf Anders
> > > suggested. Isn't that strange?
> >
> > Are you using dmix or such? It appears more like a configuration
> > issue. With the unmodified configuration, the "default" PCM for HDSPM
> > should be equivalent with "plughw".
> >
> > Could you check whether aplay -M works without device option?
> >
> > > > You should have another error from mmap, with a different offset
> > > > value. That's the real error we need to track down.
> > >
> > > I attached the complete strace.
> >
> > OK, the strace shows the mmap failure of the second channel.
> >
> > > > (And, 4.1.x is pretty old, rather too old for debugging, too...)
> > >
> > > Well, I know, but the kernel is a TI based manufacturer kernel for a SoC
> > > (AM5728). I'm not such an expert to update that to current kernel
> version
> > > unfortunately.
> > >
> > > If you don't mind I have another question: If specifying a device
> > > "--device", how would I "send" audio to the "upper" channels/tracks of
> the
> > > MADI card? If I ommit the "--device" parameter audio is playing on
> > > channels/tracks 1+2. How would I play audio to channels/tracks 33+34 for
> > > example?
> >
> > Well, you likely need to fiddle with the asoundrc in such a case.
> > Maybe a better option is to use JACK or such, I suppose.
> >
> >
> > Takashi
>
> Hello Takashi, hello list,
>
> I did some further testing with a Sound Blaster Live Audigy Rx (Emu10k1
> driver based) and this card works without any change in asound.conf, etc.
Yes, it's because emu10k1 supports only interleaved stereo format (two
channels) which works with one-shot mmap via dma_mmap_coherent().
Meanwhile HDSP MADI supports only non-interleaved format that performs
multiple mmaps, and currently it doesn't work with
dma_mmap_coherent().
> While with the RME MADI card:
>
> debian@arm:~/48kHz$ aplay -vv audio.wav
> Playing WAVE 'audio.wav' : Signed 16 bit Little Endian, Rate 48000 Hz,
> Stereo
> ALSA lib pcm_mmap.c:374:(snd_pcm_mmap) mmap failed: No such device or
> address
So my previous patch didn't help?
(BTW, area->pgoff was indeed a typo of area->vm_pgoff, so your change
should be OK.)
If it didn't work, try to put some printk() around the call of
dma_mmap_coherent() and check whether it's really called with which
value and which return (error) code it gets.
thanks,
Takashi
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