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-rw-r--r--sound/pci/sis7019.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/sound/pci/sis7019.c b/sound/pci/sis7019.c
index 9cc1b5aa0148..614ff6e514fd 100644
--- a/sound/pci/sis7019.c
+++ b/sound/pci/sis7019.c
@@ -264,11 +264,13 @@ static void sis_update_voice(struct voice *voice)
* if using small periods.
*
* If we're less than 9 samples behind, we're on target.
+ * Otherwise, shorten the next vperiod by the amount we've
+ * been delayed.
*/
if (sync > -9)
voice->vperiod = voice->sync_period_size + 1;
else
- voice->vperiod = voice->sync_period_size - 4;
+ voice->vperiod = voice->sync_period_size + sync + 10;
if (voice->vperiod < voice->buffer_size) {
sis_update_sso(voice, voice->vperiod);
@@ -736,7 +738,7 @@ static void sis_prepare_timing_voice(struct voice *voice,
period_size = buffer_size;
/* Initially, we want to interrupt just a bit behind the end of
- * the period we're clocking out. 10 samples seems to give a good
+ * the period we're clocking out. 12 samples seems to give a good
* delay.
*
* We want to spread our interrupts throughout the virtual period,
@@ -747,7 +749,7 @@ static void sis_prepare_timing_voice(struct voice *voice,
*
* This is all moot if we don't need to use virtual periods.
*/
- vperiod = runtime->period_size + 10;
+ vperiod = runtime->period_size + 12;
if (vperiod > period_size) {
u16 tail = vperiod % period_size;
u16 quarter_period = period_size / 4;
@@ -776,7 +778,7 @@ static void sis_prepare_timing_voice(struct voice *voice,
*/
timing->flags |= VOICE_SYNC_TIMING;
timing->sync_base = voice->ctrl_base;
- timing->sync_cso = runtime->period_size - 1;
+ timing->sync_cso = runtime->period_size;
timing->sync_period_size = runtime->period_size;
timing->sync_buffer_size = runtime->buffer_size;
timing->period_size = period_size;