[Linux Audio Driver] line-out强制配置成headset

0. 背景

平台： android 7、 MSM8953、kernel version： msm-3.18

别问为啥要改这个，问就是硬件的坑mmp。

1. 修改方法

文件路径： kernel/msm-3.18/sound/soc/codecs/wcd-mbhc-v2.c

@@ -816,6 +816,10 @@ static void wcd_mbhc_find_plug_and_report(struct wcd_mbhc *mbhc,
 		 __func__, mbhc->current_plug, plug_type);
 
 	WCD_MBHC_RSC_ASSERT_LOCKED(mbhc);

+	if(plug_type == MBHC_PLUG_TYPE_GND_MIC_SWAP){
+		plug_type = MBHC_PLUG_TYPE_HEADSET;
+	}
 
 	if (mbhc->current_plug == plug_type) {
 		pr_debug("%s: cable already reported, exit\n", __func__);
@@ -1920,6 +1924,7 @@ static bool wcd_mbhc_fw_validate(const void *data, size_t size)
 
 static irqreturn_t wcd_mbhc_btn_press_handler(int irq, void *data)
 {
+if (0){
 	struct wcd_mbhc *mbhc = data;
 	int mask;
 	unsigned long msec_val;
@@ -1963,9 +1968,10 @@ static irqreturn_t wcd_mbhc_btn_press_handler(int irq, void *data)
 		WARN(1, "Button pressed twice without release event\n");
 		mbhc->mbhc_cb->lock_sleep(mbhc, false);
 	}
-done:
 	pr_debug("%s: leave\n", __func__);
 	WCD_MBHC_RSC_UNLOCK(mbhc);
+}
+done:
 	return IRQ_HANDLED;
 }

2. 作者注

/******
@article{Linux Audio Driver,
Author = { 1byte ≠ 8bit},
Year = { 2020},
}
******/