eARCrx: add hdmitx hpd notify [1/1]

PD#SWPL-6861

Problem:
Lack hdmitx hpd event notify to eARC

Solution:
Add hdmitx hpd event notify to eARC in HPD interrupt handler
w/o any delay.

Verify:
TBD

Change-Id: Ic7f35365a2af634dee604f7121d62738b4b17a8d
Signed-off-by: Zongdong Jiao <zongdong.jiao@amlogic.com>

3 files changed, 45 insertions, 1 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index d221b8a..1cf49af 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -15085,4 +15085,4 @@ F:	drivers/amlogic/drm/meson_vpu.c
 AMLOGIC ADD DTS FOR T312 PLATFORM
 M:  hualing chen <hualing.chen@amlogic.com>
 F:  arch/arm64/boot/dts/amlogic/mesontm2_t962x3_t312-panel.dtsi
-F:  arch/arm/boot/dts/amlogic/mesontm2_t962x3_t312-panel.dtsi
\ No newline at end of file
+F:  arch/arm/boot/dts/amlogic/mesontm2_t962x3_t312-panel.dtsi
diff --git a/drivers/amlogic/media/vout/hdmitx/hdmi_tx_20/hw/hdmi_tx_hw.c b/drivers/amlogic/media/vout/hdmitx/hdmi_tx_20/hw/hdmi_tx_hw.c
index 2dc6904..b6ffa51 100644
--- a/drivers/amlogic/media/vout/hdmitx/hdmi_tx_20/hw/hdmi_tx_hw.c
+++ b/drivers/amlogic/media/vout/hdmitx/hdmi_tx_20/hw/hdmi_tx_hw.c
@@ -47,6 +47,7 @@
 #include "hw_clk.h"
 #include <linux/arm-smccc.h>
 #include "checksha.h"
+#include <linux/amlogic/media/sound/hdmi_earc.h>
 
 static void mode420_half_horizontal_para(void);
 static void hdmi_phy_suspend(void);
@@ -641,6 +642,20 @@ void HDMITX_Meson_Init(struct hdmitx_dev *hdev)
 	hdev->HWOp.CntlMisc(hdev, MISC_AVMUTE_OP, CLR_AVMUTE);
 }
 
+static void hdmitx_phy_bandgap_en(struct hdmitx_dev *hdev)
+{
+	switch (hdev->chip_type) {
+	case MESON_CPU_ID_TM2:
+		hd_write_reg(P_TM2_HHI_HDMI_PHY_CNTL0, 0x0b4242);
+		break;
+	case MESON_CPU_ID_SM1:
+		hd_write_reg(P_HHI_HDMI_PHY_CNTL0, 0x0b4242);
+		break;
+	default:
+		break;
+	}
+}
+
 static irqreturn_t intr_handler(int irq, void *dev)
 {
 	/* get interrupt status */
@@ -670,6 +685,8 @@ static irqreturn_t intr_handler(int irq, void *dev)
 		hdev->hdmitx_event |= HDMI_TX_HPD_PLUGIN;
 		hdev->hdmitx_event &= ~HDMI_TX_HPD_PLUGOUT;
 		hdev->rhpd_state = 1;
+		hdmitx_phy_bandgap_en(hdev);
+		earc_hdmitx_hpdst(1);
 		queue_delayed_work(hdev->hdmi_wq,
 			&hdev->work_hpd_plugin, HZ / 2);
 	}
@@ -678,6 +695,7 @@ static irqreturn_t intr_handler(int irq, void *dev)
 		hdev->hdmitx_event |= HDMI_TX_HPD_PLUGOUT;
 		hdev->hdmitx_event &= ~HDMI_TX_HPD_PLUGIN;
 		hdev->rhpd_state = 0;
+		earc_hdmitx_hpdst(0);
 		queue_delayed_work(hdev->hdmi_wq,
 			&hdev->work_hpd_plugout, HZ / 20);
 	}
diff --git a/include/linux/amlogic/media/sound/hdmi_earc.h b/include/linux/amlogic/media/sound/hdmi_earc.h
new file mode 100644
index 0000000..97e30af
--- a/dev/null
+++ b/include/linux/amlogic/media/sound/hdmi_earc.h
@@ -0,0 +1,26 @@
+/*
+ * include/linux/amlogic/media/sound/hdmi_earc.h
+ *
+ * Copyright (C) 2017 Amlogic, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ */
+
+#ifndef __HDMI_EARC_H__
+#define __HDMI_EARC_H__
+
+extern void earc_hdmitx_hpdst(bool st);
+
+void earc_hdmitx_hpdst(bool st)
+{
+};
+#endif