diff options
| author | Takashi Sakamoto <[email protected]> | 2014-08-29 13:40:45 +0900 |
|---|---|---|
| committer | Takashi Iwai <[email protected]> | 2014-08-29 09:52:07 +0200 |
| commit | 65845f29bec6bc17f80eff25c3bc39bcf3be9bf9 (patch) | |
| tree | 5fd70c1a8a22e4c439887020f2a3ef7df1673361 /net/lapb/lapb_subr.c | |
| parent | 1033eb5b5aeeb526c22068e0fb0cef9f3c14231e (diff) | |
ALSA: firewire-lib/dice: add arrangements of PCM pointer and interrupts for Dice quirk
In IEC 61883-6, one data block transfers one event. In ALSA, the event equals one PCM frame,
hence one data block transfers one PCM frame. But Dice has a quirk at higher sampling rate
(176.4/192.0 kHz) that one data block transfers two PCM frames.
Commit 10550bea44a8 ("ALSA: dice/firewire-lib: Keep dualwire mode but obsolete
CIP_HI_DUALWIRE") moved some codes related to this quirk into Dice driver. But the commit
forgot to add arrangements for PCM period interrupts and DMA pointer updates. As a result, Dice
driver cannot work correctly at higher sampling rate.
This commit adds 'double_pcm_frames' parameter to amdtp structure for this quirk. When this
parameter is set, PCM period interrupts and DMA pointer updates occur at double speed than in
IEC 61883-6.
Reported-by: Daniel Robbins <[email protected]>
Fixes: 10550bea44a8 ("ALSA: dice/firewire-lib: Keep dualwire mode but obsolete CIP_HI_DUALWIRE")
Signed-off-by: Takashi Sakamoto <[email protected]>
Cc: <[email protected]> # 3.16
Signed-off-by: Takashi Iwai <[email protected]>
Diffstat (limited to 'net/lapb/lapb_subr.c')
0 files changed, 0 insertions, 0 deletions