On Friday, October 6, 2017 2:30 PM Takashi Iwai wrote:
> 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().
Understood.
> > 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.)
Correct, didn't help.
> 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.
int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
struct vm_area_struct *area)
{
area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
#ifdef CONFIG_GENERIC_ALLOCATOR
if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) {
area->vm_page_prot =
pgprot_writecombine(area->vm_page_prot);
return remap_pfn_range(area, area->vm_start,
substream->dma_buffer.addr >> PAGE_SHIFT,
area->vm_end - area->vm_start,
area->vm_page_prot);
}
#endif /* CONFIG_GENERIC_ALLOCATOR */
#ifndef CONFIG_X86 /* for avoiding warnings arch/x86/mm/pat.c */
if (!substream->ops->page &&
substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) {
unsigned long offset = area->vm_pgoff << PAGE_SHIFT;
const char *init_name =
substream->dma_buffer.dev.dev->init_name;
u64 *dma_mask =
substream->dma_buffer.dev.dev->dma_mask;
u64 u64_dma_mask = dma_mask ? *dma_mask : 0;
u64 coherent_dma_mask =
substream->dma_buffer.dev.dev->coherent_dma_mask;
u64 dma_pfn_offset =
substream->dma_buffer.dev.dev->dma_pfn_offset;
u64 vm_start = area->vm_start;
u64 vm_end = area->vm_end;
u64 vm_size = vm_end - vm_start;
u64 offs = offset;
u64 rb_subtree_gap = area->rb_subtree_gap;
u64 vm_flags = area->vm_flags;
void *cpu_addr = substream->runtime->dma_area
+ offset;
u64 dma_addr = substream->runtime->dma_addr
+ offset;
int result =
dma_mmap_coherent(substream->dma_buffer.dev.dev,
area,
substream->runtime->dma_area +
offset,
substream->runtime->dma_addr +
offset,
area->vm_end - area->vm_start);
printk(KERN_DEBUG "dma_mmap_coherent returned %d, init_name
= \"%s\", dma_mask = %p, *dma_mask = %llu, coherent_dma_mask = %llu,
dma_pfn_offset = %llu, vm_start = %llu, vm_end = %llu, vm_size = %llu,
offset = %llu, rb_subtree_gap = %llu, vm_flags = %llu, cpu_addr = %p,
dma_addr = %llu",
result,
init_name,
dma_mask,
u64_dma_mask,
coherent_dma_mask,
dma_pfn_offset,
vm_start,
vm_end,
vm_size,
offs,
rb_subtree_gap,
vm_flags,
cpu_addr,
dma_addr);
return result;
}
#endif /* CONFIG_X86 */
/* mmap with fault handler */
area->vm_ops = &snd_pcm_vm_ops_data_fault;
return 0;
}
debian@arm:~/48kHz$ aplay -vv audio.wav
output:
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
aplay: set_params:1297: Unable to install hw params:
ACCESS: RW_INTERLEAVED
FORMAT: S16_LE
SUBFORMAT: STD
SAMPLE_BITS: 16
FRAME_BITS: 32
CHANNELS: 2
RATE: 48000
PERIOD_TIME: (21333 21334)
PERIOD_SIZE: 1024
PERIOD_BYTES: 4096
PERIODS: 2
BUFFER_TIME: (42666 42667)
BUFFER_SIZE: 2048
BUFFER_BYTES: 8192
TICK_TIME: 0
dmesg:
[ 251.739831] dma_mmap_coherent returned 0, init_name = "(null)", dma_mask
= ed804c40, *dma_mask = 4294967295, coherent_dma_mask = 4294967295,
dma_pfn_offset = 0, vm_start = 3069702144, vm_end = 3069710336, vm_size =
8192, offset = 0, rb_subtree_gap = 0, vm_flags = 67371259, cpu_addr =
f01d1000, dma_addr = 4266655744
[ 251.739857] dma_mmap_coherent returned -6, init_name = "(null)", dma_mask
= ed804c40, *dma_mask = 4294967295, coherent_dma_mask = 4294967295,
dma_pfn_offset = 0, vm_start = 3069693952, vm_end = 3069702144, vm_size =
8192, offset = 65536, rb_subtree_gap = 0, vm_flags = 67371259, cpu_addr =
f01e1000, dma_addr = 4266721280
Thanks a lot
Axel
> thanks,
>
> Takashi
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