ASoC: wcd: Avoid multiple insertion/removals for aux cable

High impedance aux cable when inserted causes jack to change to
lineout. This causes removal event to be called which results
in pause during music playback because jack value is not updated.
Do not change current plug while plug is marked as lineout.

CRs-Fixed: 2151012
Change-Id: I99797b58c48be00185a352094e32e8623faee491
Signed-off-by: Vatsal Bucha <vbucha@codeaurora.org>

asoc/codecs/wcd-mbhc-legacy.c

@@ -688,7 +688,11 @@ correct_plug_type:
 	if (!wrk_complete && mbhc->btn_press_intr) {
 		pr_debug("%s: Can be slow insertion of headphone\n", __func__);
 		wcd_cancel_btn_work(mbhc);
-		plug_type = MBHC_PLUG_TYPE_HEADPHONE;
+		/* Report as headphone only if previously
+		 * not reported as lineout
+		 */
+		if (!mbhc->force_linein)
+			plug_type = MBHC_PLUG_TYPE_HEADPHONE;
 	}
 	/*
 	 * If plug_tye is headset, we might have already reported either in

asoc/codecs/wcd-mbhc-v2.c

@@ -605,6 +605,7 @@ void wcd_mbhc_report_plug(struct wcd_mbhc *mbhc, int insertion,
 		hphrocp_off_report(mbhc, SND_JACK_OC_HPHR);
 		hphlocp_off_report(mbhc, SND_JACK_OC_HPHL);
 		mbhc->current_plug = MBHC_PLUG_TYPE_NONE;
+		mbhc->force_linein = false;
 	} else {
 		/*
 		 * Report removal of current jack type.
@@ -657,6 +658,7 @@ void wcd_mbhc_report_plug(struct wcd_mbhc *mbhc, int insertion,
 						SND_JACK_LINEOUT |
 						SND_JACK_ANC_HEADPHONE |
 						SND_JACK_UNSUPPORTED);
+			mbhc->force_linein = false;
 		}
 
 		if (mbhc->current_plug == MBHC_PLUG_TYPE_HEADSET &&
@@ -699,6 +701,7 @@ void wcd_mbhc_report_plug(struct wcd_mbhc *mbhc, int insertion,
 				 mbhc->zr < MAX_IMPED) &&
 				(jack_type == SND_JACK_HEADPHONE)) {
 				jack_type = SND_JACK_LINEOUT;
+				mbhc->force_linein = true;
 				mbhc->current_plug = MBHC_PLUG_TYPE_HIGH_HPH;
 				if (mbhc->hph_status) {
 					mbhc->hph_status &= ~(SND_JACK_HEADSET |

asoc/codecs/wcd-mbhc-v2.h

@@ -589,6 +589,7 @@ struct wcd_mbhc {
 	struct work_struct usbc_analog_work;
 
 	struct wcd_mbhc_fn *mbhc_fn;
+	bool force_linein;
 };
 
 void wcd_mbhc_find_plug_and_report(struct wcd_mbhc *mbhc,