ASoC: wm_hubs: Improve single ended line output enable performance

The enable of the single ended line outputs on wm_hubs devices performs
better if the output is enabled prior to starting VMID. Since inactive
outputs are held at VMID anyway there is little cost to doing this for
unused outputs. Add callbacks into wm_hubs and keep track of which outputs
are really active so we can disable them once we're active.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/wm_hubs.h

@@ -33,6 +33,14 @@ struct wm_hubs_data {
 	bool class_w;
 	u16 class_w_dcs;
 
+	bool lineout1_se;
+	bool lineout1n_ena;
+	bool lineout1p_ena;
+
+	bool lineout2_se;
+	bool lineout2n_ena;
+	bool lineout2p_ena;
+
 	bool dcs_done_irq;
 	struct completion dcs_done;
 };
@@ -46,5 +54,8 @@ extern int wm_hubs_handle_analogue_pdata(struct snd_soc_codec *,
 					 int micbias1_lvl, int micbias2_lvl);
 
 extern irqreturn_t wm_hubs_dcs_done(int irq, void *data);
+extern void wm_hubs_vmid_ena(struct snd_soc_codec *codec);
+extern void wm_hubs_set_bias_level(struct snd_soc_codec *codec,
+				   enum snd_soc_bias_level level);
 
 #endif