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-rw-r--r--firmware/sound.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/firmware/sound.c b/firmware/sound.c
index d66a93a70d..ca8b79e4d9 100644
--- a/firmware/sound.c
+++ b/firmware/sound.c
@@ -200,12 +200,15 @@ static void set_prescaled_volume(void)
int prescale = 0;
int l, r;
-/* The WM codecs listed don't have suitable prescaler functionality, so we let
- * the prescaler stay at 0 for these unless SW tone controls are in use */
+/* The codecs listed use HW tone controls but don't have suitable prescaler
+ * functionality, so we let the prescaler stay at 0 for these, unless
+ * SW tone controls are in use. This is to avoid needing the SW DSP just for
+ * the prescaling.
+ */
#if defined(HAVE_SW_TONE_CONTROLS) || !(defined(HAVE_WM8975) \
|| defined(HAVE_WM8711) || defined(HAVE_WM8721) || defined(HAVE_WM8731) \
- || defined(HAVE_WM8751) || defined(HAVE_WM8758) || defined(HAVE_WM8985)) \
- || defined(HAVE_TSC2100) || defined(HAVE_UDA1341)
+ || defined(HAVE_WM8751) || defined(HAVE_WM8758) || defined(HAVE_WM8985) \
+ || defined(HAVE_UDA1341))
prescale = MAX(current_bass, current_treble);
if (prescale < 0)