ASoC: Store DC offset correction for wm_hubs devices in class W mode
Providing the analogue configuration of the output path remains the same
the DC offset corrected by the DC servo will remain identical so we can
skip the callibration, reducing the startup time for the headphone output.
Implement this for the wm_hubs devices as has been done for several other
CODECs.
Don't do this if we have any analogue paths enabled since offsets may be
being introduced by the analogue paths which could vary outside the
control of the driver.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
diff --git a/sound/soc/codecs/wm8994.c b/sound/soc/codecs/wm8994.c
index 0db59c3..3f70dee 100644
--- a/sound/soc/codecs/wm8994.c
+++ b/sound/soc/codecs/wm8994.c
@@ -2228,6 +2228,7 @@
static void wm8994_update_class_w(struct snd_soc_codec *codec)
{
+ struct wm8994_priv *wm8994 = snd_soc_codec_get_drvdata(codec);
int enable = 1;
int source = 0; /* GCC flow analysis can't track enable */
int reg, reg_r;
@@ -2278,11 +2279,13 @@
WM8994_CP_DYN_PWR |
WM8994_CP_DYN_SRC_SEL_MASK,
source | WM8994_CP_DYN_PWR);
+ wm8994->hubs.class_w = true;
} else {
dev_dbg(codec->dev, "Class W disabled\n");
snd_soc_update_bits(codec, WM8994_CLASS_W_1,
WM8994_CP_DYN_PWR, 0);
+ wm8994->hubs.class_w = false;
}
}