[alsa-devel] 1.0.16->1.0.17 regression for some HDA NVidia's

[Takashi Iwai]

At Tue, 15 Jul 2008 22:54:51 +0200,
Hans-Frieder Vogt wrote:
> 
> Takashi,
> 
> with aplay things are a bit more differentiated:
> 
> bdl_pos_adj=0 and 1 are as described below
> 
> bdl_pos_adj=32
> device "default" works
> device "plughw:0,0" works or does not work, may be depending on the sound format. For a nonworking file, here is the output of the files /proc/asound/card0/pcm0p/sub0/*:
> /proc/asound/card0/pcm0p/sub0/hw_params:
> access: RW_INTERLEAVED
> format: S16_LE
> subformat: STD
> channels: 2
> rate: 44100 (44100/1)
> period_size: 4096
> buffer_size: 16384
> /proc/asound/card0/pcm0p/sub0/info:
> card: 0
> device: 0
> subdevice: 0
> stream: PLAYBACK
> id: ALC883 Analog
> name: ALC883 Analog
> subname: subdevice #0
> class: 0
> subclass: 0
> subdevices_count: 1
> subdevices_avail: 0
> /proc/asound/card0/pcm0p/sub0/prealloc:
> 64
> /proc/asound/card0/pcm0p/sub0/prealloc_max:
> 1024
> /proc/asound/card0/pcm0p/sub0/status:
> state: RUNNING
> trigger_time: 2795.506618360
> tstamp      : 2797.052537640
> delay       : 16384
> avail       : 0
> avail_max   : 818
> -----
> hw_ptr      : 818
> appl_ptr    : 17202
> /proc/asound/card0/pcm0p/sub0/sw_params:
> tstamp_mode: NONE
> period_step: 1
> avail_min: 4096
> start_threshold: 16384
> stop_threshold: 16384
> silence_threshold: 0
> silence_size: 0
> boundary: 4611686018427387904
> 
> the same file played with mmap (aplay -D plughw:0,0 --mmap soundfile) also gives no sound. 
> /proc/asound/card0/pcm0p/sub0/hw_params:
> access: MMAP_INTERLEAVED
> format: S16_LE
> subformat: STD
> channels: 2
> rate: 44100 (44100/1)
> period_size: 4096
> buffer_size: 16384
> /proc/asound/card0/pcm0p/sub0/info:
> card: 0
> device: 0
> subdevice: 0
> stream: PLAYBACK
> id: ALC883 Analog
> name: ALC883 Analog
> subname: subdevice #0
> class: 0
> subclass: 0
> subdevices_count: 1
> subdevices_avail: 0
> /proc/asound/card0/pcm0p/sub0/prealloc:
> 64
> /proc/asound/card0/pcm0p/sub0/prealloc_max:
> 1024
> /proc/asound/card0/pcm0p/sub0/status:
> state: RUNNING
> trigger_time: 2948.343350480
> tstamp      : 2949.758334160
> delay       : 16384
> avail       : 0
> avail_max   : 0
> -----
> hw_ptr      : 0
> appl_ptr    : 16384
> /proc/asound/card0/pcm0p/sub0/sw_params:
> tstamp_mode: NONE
> period_step: 1
> avail_min: 4096
> start_threshold: 16384
> stop_threshold: 16384
> silence_threshold: 0
> silence_size: 0
> boundary: 4611686018427387904
> 
> Your patch really solves this problem for bdl_pos_adj=32 (for bdl_pos_adj=0 and 1 unchanged). Thanks!

Thanks for testing!  It's not bug that bdl_pos_adj=0 and 1 don't
change the behavior.  It's intentional.  ICH takes bdl_pos_adj=1,
and =0 means to disable the feature.


Takashi