[ALSA - driver 0001766]: jackd : ALSA: cannot set period size to 1024 frames for capture

[bugtrack@alsa-project.org]

A NOTE has been added to this issue.
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<https://bugtrack.alsa-project.org/alsa-bug/view.php?id=1766> 
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Reported By:                Raymond
Assigned To:                mjander
======================================================================
Project:                    ALSA - driver
Issue ID:                   1766
Category:                   PCI - au88x0
Reproducibility:            always
Severity:                   block
Priority:                   normal
Status:                     assigned
Distribution:               
Kernel Version:             
======================================================================
Date Submitted:             01-21-2006 05:02 CET
Last Modified:              01-21-2006 05:25 CET
======================================================================
Summary:                    jackd : ALSA: cannot set period size to 1024 frames
for capture
Description: 
snd_pcm_hw_params_get_channels_max() return 4 for capture stream

static struct snd_pcm_hardware snd_vortex_playback_hw_adb = {
	.info =
	    (SNDRV_PCM_INFO_MMAP | /* SNDRV_PCM_INFO_RESUME | */
	     SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_INTERLEAVED |
	     SNDRV_PCM_INFO_MMAP_VALID),
	.formats =
	    SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U8 |
	    SNDRV_PCM_FMTBIT_MU_LAW | SNDRV_PCM_FMTBIT_A_LAW,
	.rates = SNDRV_PCM_RATE_CONTINUOUS,
	.rate_min = 5000,
	.rate_max = 48000,
	.channels_min = 1,
#ifdef CHIP_AU8830
	.channels_max = 4,
#else
	.channels_max = 2,
#endif
	.buffer_bytes_max = 0x10000,
	.period_bytes_min = 0x1,
	.period_bytes_max = 0x1000,
	.periods_min = 2,
	.periods_max = 32,
};

static int
vortex_adb_allocroute(vortex_t * vortex, int dma, int nr_ch, int dir, int
type)
{
	stream_t *stream;
	int i, en;
	
	if ((nr_ch == 3)
	    || ((dir == SNDRV_PCM_STREAM_CAPTURE) && (nr_ch > 2)))
		return -EBUSY;

therefore jackd fail with "ALSA: cannot set period size to 1024 frames for
capture"

jackd -d alsa hw:0 -S
jackd 0.100.9

...
 
JACK compiled with System V SHM support.
loading driver ..
creating alsa driver ... hw:0|hw:0|1024|2|48000|0|0|nomon|swmeter|-|16bit
control device hw:0
configuring for 48000Hz, period = 1024 frames, buffer = 2 periods
ALSA: cannot set period size to 1024 frames for capture
ALSA: cannot configure capture channel
cannot load driver module alsa
no message buffer overruns

======================================================================

----------------------------------------------------------------------
 rlrevell - 01-21-06 05:25 
----------------------------------------------------------------------
I don't understand - where is the bug?  In JACK or the driver?

Issue History
Date Modified  Username       Field                    Change              
======================================================================
01-21-06 05:02 Raymond        New Issue                                    
01-21-06 05:25 rlrevell       Note Added: 0007735                          
======================================================================




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