1 files changed, 9 insertions, 7 deletions

diff --git a/sound/pci/sis7019.c b/sound/pci/sis7019.c
index 9cc1b5aa0148..1b8f6742b5fa 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;
@@ -1047,7 +1049,7 @@ static int sis_chip_free(struct sis7019 *sis)
         /* Reset the chip, and disable all interrputs.
          */
         outl(SIS_GCR_SOFTWARE_RESET, sis->ioport + SIS_GCR);
-        udelay(10);
+        udelay(25);
         outl(0, sis->ioport + SIS_GCR);
         outl(0, sis->ioport + SIS_GIER);
 
@@ -1083,7 +1085,7 @@ static int sis_chip_init(struct sis7019 *sis)
         /* Reset the audio controller
          */
         outl(SIS_GCR_SOFTWARE_RESET, io + SIS_GCR);
-        udelay(10);
+        udelay(25);
         outl(0, io + SIS_GCR);
 
         /* Get the AC-link semaphore, and reset the codecs
@@ -1096,7 +1098,7 @@ static int sis_chip_init(struct sis7019 *sis)
                 return -EIO;
 
         outl(SIS_AC97_CMD_CODEC_COLD_RESET, io + SIS_AC97_CMD);
-        udelay(10);
+        udelay(250);
 
         count = 0xffff;
         while ((inw(io + SIS_AC97_STATUS) & SIS_AC97_STATUS_BUSY) && --count)