[ALSA - driver 0001724]: au88x0 PCM configuration problem - buffer_size constraint

[bugtrack@alsa-project.org]

A NOTE has been added to this issue.
======================================================================
<https://bugtrack.alsa-project.org/alsa-bug/view.php?id=1724> 
======================================================================
Reported By:                Raymond
Assigned To:                
======================================================================
Project:                    ALSA - driver
Issue ID:                   1724
Category:                   PCI - au88x0
Reproducibility:            always
Severity:                   block
Priority:                   normal
Status:                     new
Distribution:               
Kernel Version:             
======================================================================
Date Submitted:             01-07-2006 05:10 CET
Last Modified:              01-31-2006 11:06 CET
======================================================================
Summary:                    au88x0 PCM configuration problem - buffer_size
constraint
Description: 
/cvs/alsa-lib/test/pcm_min

ALSA lib pcm.c:7127:(snd_pcm_set_params) Unable to set buffer time
(latency) 500000 for PLAYBACK: Invalid argument
Playback open error: Invalid argument

sound card is au8830, the au88x0 driver only accept period size in power
of 2.
======================================================================

----------------------------------------------------------------------
 perex - 01-31-06 10:26 
----------------------------------------------------------------------
To be sure: I'm talking about SNDRV_PCM_HW_PARAM_BUFFER_BYTES restriction.
See pci/emu10k1/emupcm.c code how you can use the
snd_pcm_hw_constraint_list() for this parameter.



----------------------------------------------------------------------
 Raymond - 01-31-06 11:06 
----------------------------------------------------------------------
There are a number of bugs in snd_vortex_playback_hw_adb

1) capture channels is 2 
https://bugtrack.alsa-project.org/alsa-bug/view.php?id=1766
2) Turtle Beach Montego II (au8830) has stereo codec STAC9721, rear
channels seem to use I2S on the daugther card, other au8830 have quad
codec.
3) SQ1500 (au8810) SuperQuad , other au8810 have stereo codec


/* hardware definition */
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,
};

Issue History
Date Modified  Username       Field                    Change              
======================================================================
01-07-06 05:10 Raymond        New Issue                                    
01-09-06 15:19 Raymond        Note Added: 0007537                          
01-19-06 15:04 Raymond        Note Deleted: 0007537                        
01-19-06 15:36 Raymond        Note Added: 0007721                          
01-28-06 07:58 Raymond        Note Added: 0007828                          
01-28-06 07:58 Raymond        Note Deleted: 0007721                        
01-30-06 18:46 Raymond        Note Added: 0007840                          
01-31-06 03:15 Raymond        Note Added: 0007844                          
01-31-06 06:41 Raymond        Note Edited: 0007840                         
01-31-06 07:03 Raymond        Note Edited: 0007840                         
01-31-06 07:08 Raymond        Note Edited: 0007840                         
01-31-06 07:11 Raymond        Note Edited: 0007840                         
01-31-06 08:31 Raymond        Note Edited: 0007840                         
01-31-06 09:48 Raymond        Note Edited: 0007844                         
01-31-06 10:19 perex          Note Added: 0007845                          
01-31-06 10:26 perex          Note Added: 0007847                          
01-31-06 10:26 perex          Note Edited: 0007847                         
01-31-06 10:48 perex          Project                  ALSA - lib => ALSA -
driver
01-31-06 10:49 perex          Category                 0_general => PCI - au88x0
01-31-06 10:49 perex          Summary                  simple PCM helper
function => au88x0 PCM configuration problem - buffer_size constraint
01-31-06 11:06 Raymond        Note Added: 0007848                          
======================================================================




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