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path: root/sound/pci/rme9652/hdspm.c
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Diffstat (limited to 'sound/pci/rme9652/hdspm.c')
-rw-r--r--sound/pci/rme9652/hdspm.c37
1 files changed, 22 insertions, 15 deletions
diff --git a/sound/pci/rme9652/hdspm.c b/sound/pci/rme9652/hdspm.c
index e070ea85c30a..8eb2070fd258 100644
--- a/sound/pci/rme9652/hdspm.c
+++ b/sound/pci/rme9652/hdspm.c
@@ -1091,6 +1091,26 @@ static int hdspm_round_frequency(int rate)
return 48000;
}
+/* QS and DS rates normally can not be detected
+ * automatically by the card. Only exception is MADI
+ * in 96k frame mode.
+ *
+ * So if we read SS values (32 .. 48k), check for
+ * user-provided DS/QS bits in the control register
+ * and multiply the base frequency accordingly.
+ */
+static int hdspm_rate_multiplier(struct hdspm *hdspm, int rate)
+{
+ if (rate <= 48000) {
+ if (hdspm->control_register & HDSPM_QuadSpeed)
+ return rate * 4;
+ else if (hdspm->control_register &
+ HDSPM_DoubleSpeed)
+ return rate * 2;
+ };
+ return rate;
+}
+
static int hdspm_tco_sync_check(struct hdspm *hdspm);
static int hdspm_sync_in_sync_check(struct hdspm *hdspm);
@@ -1268,21 +1288,8 @@ static int hdspm_external_sample_rate(struct hdspm *hdspm)
}
}
- /* QS and DS rates normally can not be detected
- * automatically by the card. Only exception is MADI
- * in 96k frame mode.
- *
- * So if we read SS values (32 .. 48k), check for
- * user-provided DS/QS bits in the control register
- * and multiply the base frequency accordingly.
- */
- if (rate <= 48000) {
- if (hdspm->control_register & HDSPM_QuadSpeed)
- rate *= 4;
- else if (hdspm->control_register &
- HDSPM_DoubleSpeed)
- rate *= 2;
- }
+ rate = hdspm_rate_multiplier(hdspm, rate);
+
break;
}