asoc: codecs: Change TX tuning and reduce RX click and pop

Update TX requantizer gain coefficients to center
gain errors around zero. To reduce click and pop
on audio playback enable reference buffers of
headphone path in hifi mode and then put it to
the usecase specific power mode.

Change-Id: I0013d6258d5e5a8c92fd0f951d1d89e5906b2faf
Signed-off-by: Karthikeyan Mani <kmani@codeaurora.org>

asoc/codecs/wcd-clsh.c

@@ -243,7 +243,14 @@ static void wcd_clsh_flyback_ctrl(struct snd_soc_component *component,
 		__func__, clsh_d->flyback_users, enable, mode_to_str(mode));
 }
 
-static void wcd_clsh_set_hph_mode(struct snd_soc_component *component,
+/*
+ * Function: wcd_clsh_set_hph_mode
+ * Params: soc component, hph mode class
+ * Description:
+ * This function updates class H mode configuration based on
+ * the input mode.
+ */
+void wcd_clsh_set_hph_mode(struct snd_soc_component *component,
 				  int mode)
 {
 	u8 val = 0;
@@ -273,6 +280,7 @@ static void wcd_clsh_set_hph_mode(struct snd_soc_component *component,
 
 	snd_soc_component_update_bits(component, WCD9XXX_ANA_HPH, 0x0C, val);
 }
+EXPORT_SYMBOL(wcd_clsh_set_hph_mode);
 
 static void wcd_clsh_set_flyback_current(struct snd_soc_component *component,
 				int mode)