----- Original Message -----
From: "Liam Girdwood" <lg@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
To: "thomas.luo" <thomas.luo@xxxxxxxx>
Cc: <alsa-devel@xxxxxxxxxxxxxxxxxxxxx>
Sent: Friday, January 12, 2007 10:23 PM
Subject: Re: alsa driver problem
On Fri, 2007-01-12 at 16:06 +0800, thomas.luo wrote:
when i force the avail_min to 4096, the whole system work well.
who can tell me any idea?
This may be related to a compiler optimisation bug for ARM that caused
PCM refinement to fail.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27363
More info can be found by searching the archives.
Liam
Dear Liam:
i have apply this patch, but it is same. this is my code in the aplay.
sleep(1);
snd_pcm_hw_params_dump(params, log);
sleep(1);
error(_("chunk_size:%x\n"),chunk_size);
snd_pcm_hw_params_get_period_size(params, &chunk_size, 0);
//chunk_size =4096;
error(_("chunk_size:%x\n"),chunk_size);
sleep(1);
snd_pcm_hw_params_dump(params, log);
sleep(1);
and the output.
Rule 1 [bf00713c]: SAMPLE_BITS = [16 16] -> [16 16]
Rule 2 [bf0072a4]: SAMPLE_BITS = [16 16] -> [16 16]
Rule 3 [bf007240]: FRAME_BITS = [32 32] -> [32 32]
Rule 4 [bf007370]: FRAME_BITS = [32 32] -> [32 32]
Rule 5 [bf007370]: FRAME_BITS = [32 32] -> [32 32]
Rule 6 [bf0072a4]: CHANNELS = [2 2] -> [2 2]
Rule 7 [bf007370]: RATE = [44100 44100] -> [44100 44100]
Rule 8 [bf007370]: RATE = [44100 44100] -> [44100 44100]
Rule 9 [bf0072a4]: PERIODS = [4 4] -> [4 4]
Rule 10 [bf0072a4]: PERIOD_SIZE = [4096 4096] -> [4096 4096]
Rule 11 [bf007370]: PERIOD_SIZE = [4096 4096] -> [4096 4096]
Rule 12 [bf007308]: PERIOD_SIZE = [4096 4096] -> [4096 4096]
Rule 13 [bf007240]: BUFFER_SIZE = [16384 16384] -> [16384 16384]
Rule 14 [bf007370]: BUFFER_SIZE = [16384 16384] -> [16384 16384]
Rule 15 [bf007308]: BUFFER_SIZE = [16384 16384] -> [16384 16384]
Rule 16 [bf007308]: PERIOD_BYTES = [16384 16384] -> [16384 16384]
Rule 17 [bf007308]: BUFFER_BYTES = [65536 65536] -> [65536 65536]
Rule 18 [bf007370]: PERIOD_TIME = (92879 92880) -> (92879 92880)
Rule 19 [bf007370]: BUFFER_TIME = (371519 371520) -> (371519 371520)
Rule 20 [bf033c00]: CHANNELS = [2 2] -> [2 2]
Rule 21 [bf033e74]: RATE = [44100 44100]s->codec_idx:0x0,s->rate_idx:0x0
-> [44100 44100]
Rule 22 [bf0062ec]: BUFFER_BYTES = [65536 65536] -> [65536 65536]
ACCESS: RW_INTERLEAVED
FORMAT: S16_LE
SUBFORMAT: STD
SAMPLE_BITS: 16
FRAME_BITS: 32
CHANNELS: 2
RATE: 44100
PERIOD_TIME: (92879 92880)
PERIOD_SIZE: 4096
PERIOD_BYTES: 16384
PERIODS: 4
BUFFER_TIME: (371519 371520)
BUFFER_SIZE: 16384
BUFFER_BYTES: 65536
TICK_TIME: 10000
aplay: set_params:968: chunk_size:400
aplay: set_params:971: chunk_size:0
ACCESS: RW_INTERLEAVED
FORMAT: S16_LE
SUBFORMAT: STD
SAMPLE_BITS: 16
FRAME_BITS: 32
CHANNELS: 2
RATE: 44100
PERIOD_TIME: (92879 92880)
PERIOD_SIZE: 4096
PERIOD_BYTES: 16384
PERIODS: 4
BUFFER_TIME: (371519 371520)
BUFFER_SIZE: 16384
BUFFER_BYTES: 65536
TICK_TIME: 10000
start_mode: DATA
xrun_mode: STOP
tstamp_mode: NONE
period_step: 1
sleep_min: 0
avail_min: 4096
xfer_align: 4096
silence_threshold: 0
silence_size: 0
boundary: 1073741824
aplay: set_params:1024: snd_pcm_sw_params
ALSA lib pcm.c:873:(snd_pcm_sw_params) params->avail_min is 0
aplay: set_params:1028: unable to install sw params:
start_mode: DATA
xrun_mode: STOP
tstamp_mode: NONE
period_step: 1
sleep_min: 0
avail_min: 0
xfer_align: 114112
silence_threshold: 0
silence_size: 0
boundary: 1073741824
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