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-rw-r--r--firmware/export/erosqlinux_codec.h2
-rw-r--r--firmware/target/hosted/pcm-alsa.c9
2 files changed, 9 insertions, 2 deletions
diff --git a/firmware/export/erosqlinux_codec.h b/firmware/export/erosqlinux_codec.h
index b6ab58fa74..2ed1ae11cf 100644
--- a/firmware/export/erosqlinux_codec.h
+++ b/firmware/export/erosqlinux_codec.h
@@ -3,6 +3,8 @@
#define AUDIOHW_CAPS (LINEOUT_CAP)
+#define PCM_DC_OFFSET_VALUE -1
+
AUDIOHW_SETTING(VOLUME, "dB", 0, 2, -74, 0, -40)
//#define AUDIOHW_NEEDS_INITIAL_UNMUTE
diff --git a/firmware/target/hosted/pcm-alsa.c b/firmware/target/hosted/pcm-alsa.c
index 13ebbbcbeb..68002d8158 100644
--- a/firmware/target/hosted/pcm-alsa.c
+++ b/firmware/target/hosted/pcm-alsa.c
@@ -68,6 +68,11 @@
#warning "MIX_FRAME_SAMPLES <1024 may cause dropouts!"
#endif
+/* PCM_DC_OFFSET_VALUE is a workaround for eros q hardware quirk */
+#if !defined(PCM_DC_OFFSET_VALUE)
+# define PCM_DC_OFFSET_VALUE 0
+#endif
+
static const snd_pcm_access_t access_ = SND_PCM_ACCESS_RW_INTERLEAVED; /* access mode */
#if defined(HAVE_ALSA_32BIT)
static const snd_pcm_format_t format = SND_PCM_FORMAT_S32_LE; /* sample format */
@@ -359,8 +364,8 @@ static bool copy_frames(bool first)
sample_t *sample_ptr = &frames[2*(period_size-frames_left)];
for (int i = 0; i < nframes; i++)
{
- *sample_ptr++ = *pcm_ptr++ * dig_vol_mult_l;
- *sample_ptr++ = *pcm_ptr++ * dig_vol_mult_r;
+ *sample_ptr++ = (*pcm_ptr++ * dig_vol_mult_l) + PCM_DC_OFFSET_VALUE;
+ *sample_ptr++ = (*pcm_ptr++ * dig_vol_mult_r) + PCM_DC_OFFSET_VALUE;
}
}
else