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| author | Cliff Cai <cliff.cai@analog.com> | 2008-09-27 22:32:20 +0800 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2008-10-13 02:16:30 +0200 |
| commit | 6b58a82121320f96513d88032dc3495a9c6f450b (patch) | |
| tree | 0290ca3031c1ec04fca96fdb303f981f7aedcac0 /sound/soc/blackfin/bf5xx-sport.h | |
| parent | 5564b14b88a5a34ea848732030fbc202a050daa6 (diff) | |
| download | lwn-6b58a82121320f96513d88032dc3495a9c6f450b.tar.gz lwn-6b58a82121320f96513d88032dc3495a9c6f450b.zip | |
ALSA: ASoC Blackfin: fix bug - Audio Latency on AD1981 with MMAP enabled
With MMAP enabled (DMA mode) on the AD1981, there is +/- 250ms of delay between
writing data to alsa and audio starts coming out of the AD1981.
Copy more data to local buffer before starting DMA
Signed-off-by: Cliff Cai <cliff.cai@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/soc/blackfin/bf5xx-sport.h')
| -rw-r--r-- | sound/soc/blackfin/bf5xx-sport.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/sound/soc/blackfin/bf5xx-sport.h b/sound/soc/blackfin/bf5xx-sport.h index 4c163454bbf8..fcadcc081f7f 100644 --- a/sound/soc/blackfin/bf5xx-sport.h +++ b/sound/soc/blackfin/bf5xx-sport.h @@ -123,6 +123,8 @@ struct sport_device { int rx_pos; unsigned int tx_buffer_size; unsigned int rx_buffer_size; + int tx_delay_pos; + int once; #endif void *private_data; }; |