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From: mac.shen <mac.shen@mediatek.com>
To: <chunkuang.hu@kernel.org>, <p.zabel@pengutronix.de>, <airlied@gmail.com>,
	<daniel@ffwll.ch>, <matthias.bgg@gmail.com>,
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CC: <mac.shen@mediatek.com>, <shuijing.li@mediatek.com>,
	<linux-kernel@vger.kernel.org>, <dri-devel@lists.freedesktop.org>,
	<linux-mediatek@lists.infradead.org>, <linux-arm-kernel@lists.infradead.org>
Subject: [PATCH v2 2/3] Subject: [PATCH] drm/mediatek/dp: Add HDCP2.x feature
 for DisplayPort
Date: Mon, 5 Feb 2024 13:50:37 +0800
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Add HDCP2.x feature for DisplayPort.
When userspace request the kernel protect future content communicated
over the link with Content_Protection property, the feature will do
HDCP2.x authentication if the sink support HDCP2.X.

Changes in v2:
- remove switch case, and refine code to make more clear
- remove some definitions, and use the definitions in
  include/drm/drm_hdcp.h
- use the struct which defined in include/drm/drm_hdcp.h
- do HDCP2.x authentication when userspace request the
  kernel protect future content communicated
per suggestion from the previous thread:
https://lore.kernel.org/all/8fff59b5567449d8201dd1138c8fa
9218a545c46.camel@mediatek.com/

Signed-off-by: mac.shen <mac.shen@mediatek.com>
---
 drivers/gpu/drm/mediatek/Makefile       |    1 +
 drivers/gpu/drm/mediatek/mtk_dp.c       |  297 +++++--
 drivers/gpu/drm/mediatek/mtk_dp.h       |   99 +++
 drivers/gpu/drm/mediatek/mtk_dp_hdcp2.c | 1021 +++++++++++++++++++++++
 drivers/gpu/drm/mediatek/mtk_dp_hdcp2.h |   52 ++
 drivers/gpu/drm/mediatek/mtk_dp_reg.h   |    4 +-
 drivers/gpu/drm/mediatek/mtk_dpi.c      |    3 +
 7 files changed, 1392 insertions(+), 85 deletions(-)
 create mode 100644 drivers/gpu/drm/mediatek/mtk_dp.h
 create mode 100644 drivers/gpu/drm/mediatek/mtk_dp_hdcp2.c
 create mode 100644 drivers/gpu/drm/mediatek/mtk_dp_hdcp2.h

diff --git a/drivers/gpu/drm/mediatek/Makefile b/drivers/gpu/drm/mediatek/M=
akefile
index c80e6c2f9336..50ea069b047e 100644
--- a/drivers/gpu/drm/mediatek/Makefile
+++ b/drivers/gpu/drm/mediatek/Makefile
@@ -27,6 +27,7 @@ mediatek-drm-hdmi-objs :=3D mtk_cec.o \
 obj-$(CONFIG_DRM_MEDIATEK_HDMI) +=3D mediatek-drm-hdmi.o
=20
 mtk-dp-objs :=3D tlc_dp_hdcp.o \
+		  mtk_dp_hdcp2.o \
 		  mtk_dp.o
=20
 obj-$(CONFIG_DRM_MEDIATEK_DP) +=3D mtk-dp.o
diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/m=
tk_dp.c
index e4c16ba9902d..7ff72f15528b 100644
--- a/drivers/gpu/drm/mediatek/mtk_dp.c
+++ b/drivers/gpu/drm/mediatek/mtk_dp.c
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
- * Copyright (c) 2019-2022 MediaTek Inc.
+ * Copyright (c) 2019-2024 MediaTek Inc.
  * Copyright (c) 2022 BayLibre
  */
=20
@@ -8,13 +8,13 @@
 #include <drm/display/drm_dp.h>
 #include <drm/display/drm_dp_helper.h>
 #include <drm/drm_atomic_helper.h>
-#include <drm/drm_bridge.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_edid.h>
 #include <drm/drm_of.h>
 #include <drm/drm_panel.h>
 #include <drm/drm_print.h>
 #include <drm/drm_probe_helper.h>
+#include <drm/display/drm_hdcp_helper.h>
 #include <linux/arm-smccc.h>
 #include <linux/clk.h>
 #include <linux/delay.h>
@@ -30,10 +30,10 @@
 #include <linux/pm_runtime.h>
 #include <linux/regmap.h>
 #include <linux/soc/mediatek/mtk_sip_svc.h>
-#include <sound/hdmi-codec.h>
-#include <video/videomode.h>
=20
+#include "mtk_dp.h"
 #include "mtk_dp_reg.h"
+#include "mtk_dp_hdcp2.h"
=20
 #define MTK_DP_SIP_CONTROL_AARCH32	MTK_SIP_SMC_CMD(0x523)
 #define MTK_DP_SIP_ATF_EDP_VIDEO_UNMUTE	(BIT(0) | BIT(5))
@@ -52,43 +52,6 @@
 #define MTK_DP_VERSION 0x11
 #define MTK_DP_SDP_AUI 0x4
=20
-enum {
-	MTK_DP_CAL_GLB_BIAS_TRIM =3D 0,
-	MTK_DP_CAL_CLKTX_IMPSE,
-	MTK_DP_CAL_LN_TX_IMPSEL_PMOS_0,
-	MTK_DP_CAL_LN_TX_IMPSEL_PMOS_1,
-	MTK_DP_CAL_LN_TX_IMPSEL_PMOS_2,
-	MTK_DP_CAL_LN_TX_IMPSEL_PMOS_3,
-	MTK_DP_CAL_LN_TX_IMPSEL_NMOS_0,
-	MTK_DP_CAL_LN_TX_IMPSEL_NMOS_1,
-	MTK_DP_CAL_LN_TX_IMPSEL_NMOS_2,
-	MTK_DP_CAL_LN_TX_IMPSEL_NMOS_3,
-	MTK_DP_CAL_MAX,
-};
-
-struct mtk_dp_train_info {
-	bool sink_ssc;
-	bool cable_plugged_in;
-	/* link_rate is in multiple of 0.27Gbps */
-	int link_rate;
-	int lane_count;
-	unsigned int channel_eq_pattern;
-};
-
-struct mtk_dp_audio_cfg {
-	bool detect_monitor;
-	int sad_count;
-	int sample_rate;
-	int word_length_bits;
-	int channels;
-};
-
-struct mtk_dp_info {
-	enum dp_pixelformat format;
-	struct videomode vm;
-	struct mtk_dp_audio_cfg audio_cur_cfg;
-};
-
 struct mtk_dp_efuse_fmt {
 	unsigned short idx;
 	unsigned short shift;
@@ -98,44 +61,6 @@ struct mtk_dp_efuse_fmt {
 	unsigned short default_val;
 };
=20
-struct mtk_dp {
-	bool enabled;
-	bool need_debounce;
-	int irq;
-	u8 max_lanes;
-	u8 max_linkrate;
-	u8 rx_cap[DP_RECEIVER_CAP_SIZE];
-	u32 cal_data[MTK_DP_CAL_MAX];
-	u32 irq_thread_handle;
-	/* irq_thread_lock is used to protect irq_thread_handle */
-	spinlock_t irq_thread_lock;
-
-	struct device *dev;
-	struct drm_bridge bridge;
-	struct drm_bridge *next_bridge;
-	struct drm_connector *conn;
-	struct drm_device *drm_dev;
-	struct drm_dp_aux aux;
-
-	const struct mtk_dp_data *data;
-	struct mtk_dp_info info;
-	struct mtk_dp_train_info train_info;
-
-	struct platform_device *phy_dev;
-	struct phy *phy;
-	struct regmap *regs;
-	struct timer_list debounce_timer;
-
-	/* For audio */
-	bool audio_enable;
-	hdmi_codec_plugged_cb plugged_cb;
-	struct platform_device *audio_pdev;
-
-	struct device *codec_dev;
-	/* protect the plugged_cb as it's used in both bridge ops and audio */
-	struct mutex update_plugged_status_lock;
-};
-
 struct mtk_dp_data {
 	int bridge_type;
 	unsigned int smc_cmd;
@@ -319,12 +244,28 @@ static struct regmap_config mtk_dp_regmap_config =3D {
 	.name =3D "mtk-dp-registers",
 };
=20
+u32 mtk_dp_get_system_time(void)
+{
+	u32 tms =3D (u32)((sched_clock() / 1000000) % 1000000);
+	return tms;
+}
+
+u32 mtk_dp_get_time_diff(u32 pre_time)
+{
+	u32 post_time =3D mtk_dp_get_system_time();
+
+	if (pre_time > post_time)
+		return ((1000000 - pre_time) + post_time);
+	else
+		return (post_time - pre_time);
+}
+
 static struct mtk_dp *mtk_dp_from_bridge(struct drm_bridge *b)
 {
 	return container_of(b, struct mtk_dp, bridge);
 }
=20
-static u32 mtk_dp_read(struct mtk_dp *mtk_dp, u32 offset)
+u32 mtk_dp_read(struct mtk_dp *mtk_dp, u32 offset)
 {
 	u32 read_val;
 	int ret;
@@ -350,8 +291,8 @@ static int mtk_dp_write(struct mtk_dp *mtk_dp, u32 offs=
et, u32 val)
 	return ret;
 }
=20
-static int mtk_dp_update_bits(struct mtk_dp *mtk_dp, u32 offset,
-			      u32 val, u32 mask)
+int mtk_dp_update_bits(struct mtk_dp *mtk_dp, u32 offset,
+		       u32 val, u32 mask)
 {
 	int ret =3D regmap_update_bits(mtk_dp->regs, offset, mask, val);
=20
@@ -1865,6 +1806,160 @@ static void mtk_dp_init_port(struct mtk_dp *mtk_dp)
 	mtk_dp_digital_sw_reset(mtk_dp);
 }
=20
+void mtk_dp_check_hdcp_version(struct mtk_dp *mtk_dp, bool only_hdcp1x)
+{
+	if (!only_hdcp1x && dp_tx_hdcp2_support(&mtk_dp->hdcp_info))
+		return;
+
+	if (tee_add_device(&mtk_dp->hdcp_info, HDCP_NONE) !=3D RET_SUCCESS)
+		mtk_dp->hdcp_info.auth_status =3D AUTH_FAIL;
+}
+
+static void mtk_dp_check_sink_esi(struct mtk_dp *mtk_dp)
+{
+	u8 clear_cp_irq =3D BIT(2);
+
+	if (mtk_dp->hdcp_info.hdcp2_info.enable) {
+		dp_tx_hdcp2_irq(&mtk_dp->hdcp_info);
+		drm_dp_dpcd_write(&mtk_dp->aux,
+				  DP_DEVICE_SERVICE_IRQ_VECTOR, &clear_cp_irq, 0x1);
+	}
+	/*hdcp 1.x do not need irq*/
+}
+
+static void mtk_dp_hpd_sink_event(struct mtk_dp *mtk_dp)
+{
+	ssize_t ret;
+	u8 sink_count;
+	u8 sink_count_200;
+
+	ret =3D drm_dp_dpcd_readb(&mtk_dp->aux, DP_SINK_COUNT_ESI, &sink_count);
+	if (ret < 0) {
+		drm_info(mtk_dp->drm_dev, "Read sink count failed: %ld\n", ret);
+		return;
+	}
+
+	ret =3D drm_dp_dpcd_readb(&mtk_dp->aux, DP_SINK_COUNT, &sink_count_200);
+	if (ret < 0) {
+		drm_info(mtk_dp->drm_dev,
+			 "Read DP_SINK_COUNT_ESI failed: %ld\n", ret);
+		return;
+	}
+
+	mtk_dp_check_sink_esi(mtk_dp);
+}
+
+static void mtk_dp_hdcp_handle(struct work_struct *data)
+{
+	struct mtk_dp *mtk_dp =3D container_of(data, struct mtk_dp, hdcp_work);
+
+	if (!mtk_dp->train_info.cable_plugged_in)
+		return;
+
+	if (mtk_dp->hdcp_info.auth_status =3D=3D AUTH_PREPARE) {
+		mtk_dp_check_hdcp_version(mtk_dp, false);
+		if (mtk_dp->hdcp_info.hdcp2_info.enable)
+			dp_tx_hdcp2_set_start_auth(&mtk_dp->hdcp_info, true);
+		else
+			mtk_dp->hdcp_info.auth_status =3D AUTH_ZERO;
+	}
+
+	while (mtk_dp->hdcp_info.hdcp2_info.enable &&
+	       mtk_dp->hdcp_info.auth_status !=3D AUTH_FAIL &&
+			mtk_dp->hdcp_info.auth_status !=3D AUTH_PASS) {
+		if (mtk_dp->hdcp_info.hdcp2_info.enable)
+			dp_tx_hdcp2_fsm(&mtk_dp->hdcp_info);
+	}
+}
+
+static void mtk_dp_hdcp_prop_work(struct work_struct *work)
+{
+	struct mtk_dp *mtk_dp;
+	struct delayed_work *dework;
+	struct drm_device *drm_dev;
+
+	dework =3D to_delayed_work(work);
+	mtk_dp =3D container_of(dework, struct mtk_dp, prop_work);
+
+	if (!mtk_dp->conn) {
+		dev_err(mtk_dp->dev, "connector is null!");
+		return;
+	}
+
+	drm_dev =3D mtk_dp->conn->dev;
+
+	drm_modeset_lock(&drm_dev->mode_config.connection_mutex, NULL);
+
+	if (mtk_dp->hdcp_info.content_protection !=3D DRM_MODE_CONTENT_PROTECTION=
_UNDESIRED)
+		mtk_dp->hdcp_info.content_protection =3D
+		(mtk_dp->hdcp_info.auth_status =3D=3D AUTH_PASS) ? DRM_MODE_CONTENT_PROT=
ECTION_ENABLED :
+		DRM_MODE_CONTENT_PROTECTION_DESIRED;
+	else
+		mtk_dp->hdcp_info.content_protection =3D
+		(mtk_dp->hdcp_info.auth_status =3D=3D AUTH_PASS) ? DRM_MODE_CONTENT_PROT=
ECTION_ENABLED :
+		DRM_MODE_CONTENT_PROTECTION_UNDESIRED;
+
+	dev_info(mtk_dp->dev, "update CP, content protection: %d, auth status:%d\=
n",
+		 mtk_dp->hdcp_info.content_protection, mtk_dp->hdcp_info.auth_status);
+	drm_hdcp_update_content_protection(mtk_dp->conn, mtk_dp->hdcp_info.conten=
t_protection);
+
+	drm_modeset_unlock(&drm_dev->mode_config.connection_mutex);
+}
+
+static void mtk_dp_hdcp_atomic_check(struct mtk_dp *mtk_dp, struct drm_con=
nector_state *state)
+{
+	unsigned int hdcp_content_type =3D state->hdcp_content_type;
+	unsigned int content_protection =3D state->content_protection;
+
+	dev_dbg(mtk_dp->dev, "CP type and protection, atomic: %d, %d, driver:%d, =
%d\n",
+		hdcp_content_type, content_protection,
+		mtk_dp->hdcp_info.hdcp_content_type, mtk_dp->hdcp_info.content_protectio=
n);
+
+	if ((content_protection =3D=3D DRM_MODE_CONTENT_PROTECTION_UNDESIRED &&
+	     mtk_dp->hdcp_info.content_protection =3D=3D DRM_MODE_CONTENT_PROTECT=
ION_ENABLED) ||
+		(hdcp_content_type !=3D mtk_dp->hdcp_info.hdcp_content_type &&
+		 content_protection !=3D DRM_MODE_CONTENT_PROTECTION_UNDESIRED)) {
+		mtk_dp->hdcp_info.content_protection =3D content_protection;
+
+		dev_dbg(mtk_dp->dev, "disable HDCP\n");
+		if (mtk_dp->hdcp_info.hdcp2_info.enable)
+			dp_tx_hdcp2_set_start_auth(&mtk_dp->hdcp_info, false);
+
+		drm_hdcp_update_content_protection(mtk_dp->conn,
+						   mtk_dp->hdcp_info.content_protection);
+	}
+
+	if (content_protection =3D=3D DRM_MODE_CONTENT_PROTECTION_DESIRED ||
+	    (hdcp_content_type !=3D mtk_dp->hdcp_info.hdcp_content_type &&
+		 content_protection !=3D DRM_MODE_CONTENT_PROTECTION_UNDESIRED)) {
+		mtk_dp->hdcp_info.content_protection =3D content_protection;
+		mtk_dp->hdcp_info.hdcp_content_type =3D hdcp_content_type;
+		mtk_dp->hdcp_info.hdcp2_info.stream_id_type =3D hdcp_content_type;
+
+		if (mtk_dp->hdcp_info.auth_status =3D=3D AUTH_FAIL ||
+		    mtk_dp->hdcp_info.auth_status =3D=3D AUTH_ZERO) {
+			dev_dbg(mtk_dp->dev, "enable HDCP\n");
+			mtk_dp_authentication(&mtk_dp->hdcp_info);
+
+			queue_delayed_work(mtk_dp->hdcp_workqueue,
+					   &mtk_dp->prop_work, msecs_to_jiffies(2000));
+		}
+	}
+}
+
+void mtk_dp_authentication(struct mtk_hdcp_info *hdcp_info)
+{
+	struct mtk_dp *mtk_dp =3D container_of(hdcp_info, struct mtk_dp, hdcp_inf=
o);
+
+	if (!mtk_dp->train_info.cable_plugged_in)
+		return;
+
+	hdcp_info->auth_status =3D AUTH_PREPARE;
+
+	dev_info(mtk_dp->dev, "dp start HDCP work");
+	queue_work(mtk_dp->hdcp_workqueue, &mtk_dp->hdcp_work);
+}
+
 static irqreturn_t mtk_dp_hpd_event_thread(int hpd, void *dev)
 {
 	struct mtk_dp *mtk_dp =3D dev;
@@ -1894,9 +1989,11 @@ static irqreturn_t mtk_dp_hpd_event_thread(int hpd, =
void *dev)
 		}
 	}
=20
-	if (status & MTK_DP_THREAD_HPD_EVENT)
+	if (status & MTK_DP_THREAD_HPD_EVENT) {
 		dev_dbg(mtk_dp->dev, "Receive IRQ from sink devices\n");
-
+		/*check if need clear hpd irq*/
+		mtk_dp_hpd_sink_event(mtk_dp);
+	}
 	return IRQ_HANDLED;
 }
=20
@@ -2233,6 +2330,7 @@ static void mtk_dp_bridge_atomic_enable(struct drm_br=
idge *bridge,
 					struct drm_bridge_state *old_state)
 {
 	struct mtk_dp *mtk_dp =3D mtk_dp_from_bridge(bridge);
+	struct drm_connector_state *connector_state;
 	int ret;
=20
 	mtk_dp->conn =3D drm_atomic_get_new_connector_for_encoder(old_state->base=
.state,
@@ -2243,6 +2341,8 @@ static void mtk_dp_bridge_atomic_enable(struct drm_br=
idge *bridge,
 		return;
 	}
=20
+	connector_state =3D drm_atomic_get_connector_state(old_state->base.state,=
 mtk_dp->conn);
+
 	mtk_dp_aux_panel_poweron(mtk_dp, true);
=20
 	/* Training */
@@ -2272,6 +2372,14 @@ static void mtk_dp_bridge_atomic_enable(struct drm_b=
ridge *bridge,
 	mtk_dp->enabled =3D true;
 	mtk_dp_update_plugged_status(mtk_dp);
=20
+	/* Enable hdcp if it's desired */
+	dev_info(mtk_dp->dev, "hdcp_content_type:%d, content protection: %d",
+		 connector_state->hdcp_content_type, connector_state->content_protection=
);
+	if (connector_state->content_protection =3D=3D DRM_MODE_CONTENT_PROTECTIO=
N_DESIRED) {
+		mtk_dp->hdcp_info.hdcp_content_type =3D connector_state->hdcp_content_ty=
pe;
+		mtk_dp_authentication(&mtk_dp->hdcp_info);
+	}
+
 	return;
 power_off_aux:
 	mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
@@ -2284,6 +2392,17 @@ static void mtk_dp_bridge_atomic_disable(struct drm_=
bridge *bridge,
 {
 	struct mtk_dp *mtk_dp =3D mtk_dp_from_bridge(bridge);
=20
+	if (mtk_dp->hdcp_info.hdcp2_info.enable)
+		dp_tx_hdcp2_set_start_auth(&mtk_dp->hdcp_info, false);
+
+	if (mtk_dp->hdcp_info.content_protection !=3D DRM_MODE_CONTENT_PROTECTION=
_UNDESIRED) {
+		mtk_dp->hdcp_info.content_protection =3D DRM_MODE_CONTENT_PROTECTION_DES=
IRED;
+		dev_info(mtk_dp->dev, "update CP, content protection: %d\n",
+			 mtk_dp->hdcp_info.content_protection);
+		drm_hdcp_update_content_protection(mtk_dp->conn,
+						   mtk_dp->hdcp_info.content_protection);
+	}
+
 	mtk_dp->enabled =3D false;
 	mtk_dp_update_plugged_status(mtk_dp);
 	mtk_dp_video_enable(mtk_dp, false);
@@ -2418,6 +2537,8 @@ static int mtk_dp_bridge_atomic_check(struct drm_brid=
ge *bridge,
=20
 	drm_display_mode_to_videomode(&crtc_state->adjusted_mode, &mtk_dp->info.v=
m);
=20
+	mtk_dp_hdcp_atomic_check(mtk_dp, conn_state);
+
 	return 0;
 }
=20
@@ -2657,6 +2778,14 @@ static int mtk_dp_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
=20
+	INIT_WORK(&mtk_dp->hdcp_work, mtk_dp_hdcp_handle);
+	INIT_DELAYED_WORK(&mtk_dp->prop_work, mtk_dp_hdcp_prop_work);
+	mtk_dp->hdcp_workqueue =3D create_workqueue("mtk_dp_hdcp_work");
+	if (!mtk_dp->hdcp_workqueue) {
+		dev_err(mtk_dp->dev, "failed to create hdcp work queue");
+		return -ENOMEM;
+	}
+
 	mtk_dp->bridge.funcs =3D &mtk_dp_bridge_funcs;
 	mtk_dp->bridge.of_node =3D dev->of_node;
 	mtk_dp->bridge.type =3D mtk_dp->data->bridge_type;
diff --git a/drivers/gpu/drm/mediatek/mtk_dp.h b/drivers/gpu/drm/mediatek/m=
tk_dp.h
new file mode 100644
index 000000000000..85c0cf0005c0
--- /dev/null
+++ b/drivers/gpu/drm/mediatek/mtk_dp.h
@@ -0,0 +1,99 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2019-2024 MediaTek Inc.
+ */
+
+#ifndef _MTK_DP_H_
+#define _MTK_DP_H_
+
+#include "tlc_dp_hdcp.h"
+#include <drm/drm_bridge.h>
+#include <sound/hdmi-codec.h>
+#include <video/videomode.h>
+
+enum {
+	MTK_DP_CAL_GLB_BIAS_TRIM =3D 0,
+	MTK_DP_CAL_CLKTX_IMPSE,
+	MTK_DP_CAL_LN_TX_IMPSEL_PMOS_0,
+	MTK_DP_CAL_LN_TX_IMPSEL_PMOS_1,
+	MTK_DP_CAL_LN_TX_IMPSEL_PMOS_2,
+	MTK_DP_CAL_LN_TX_IMPSEL_PMOS_3,
+	MTK_DP_CAL_LN_TX_IMPSEL_NMOS_0,
+	MTK_DP_CAL_LN_TX_IMPSEL_NMOS_1,
+	MTK_DP_CAL_LN_TX_IMPSEL_NMOS_2,
+	MTK_DP_CAL_LN_TX_IMPSEL_NMOS_3,
+	MTK_DP_CAL_MAX,
+};
+
+struct mtk_dp_audio_cfg {
+	bool detect_monitor;
+	int sad_count;
+	int sample_rate;
+	int word_length_bits;
+	int channels;
+};
+
+struct mtk_dp_info {
+	enum dp_pixelformat format;
+	struct videomode vm;
+	struct mtk_dp_audio_cfg audio_cur_cfg;
+};
+
+struct mtk_dp_train_info {
+	bool sink_ssc;
+	bool cable_plugged_in;
+	/* link_rate is in multiple of 0.27Gbps */
+	int link_rate;
+	int lane_count;
+	unsigned int channel_eq_pattern;
+};
+
+struct mtk_dp {
+	bool enabled;
+	bool need_debounce;
+	int irq;
+	u8 max_lanes;
+	u8 max_linkrate;
+	u8 rx_cap[DP_RECEIVER_CAP_SIZE];
+	u32 cal_data[MTK_DP_CAL_MAX];
+	u32 irq_thread_handle;
+	/* irq_thread_lock is used to protect irq_thread_handle */
+	spinlock_t irq_thread_lock;
+
+	struct device *dev;
+	struct drm_bridge bridge;
+	struct drm_bridge *next_bridge;
+	struct drm_connector *conn;
+	struct drm_device *drm_dev;
+	struct drm_dp_aux aux;
+
+	const struct mtk_dp_data *data;
+	struct mtk_dp_info info;
+	struct mtk_dp_train_info train_info;
+	struct mtk_hdcp_info hdcp_info;
+	struct work_struct hdcp_work;
+	struct delayed_work prop_work;
+	struct workqueue_struct *hdcp_workqueue;
+
+	struct platform_device *phy_dev;
+	struct phy *phy;
+	struct regmap *regs;
+	struct timer_list debounce_timer;
+
+	/* For audio */
+	bool audio_enable;
+	hdmi_codec_plugged_cb plugged_cb;
+	struct platform_device *audio_pdev;
+
+	struct device *codec_dev;
+	/* protect the plugged_cb as it's used in both bridge ops and audio */
+	struct mutex update_plugged_status_lock;
+};
+
+u32 mtk_dp_get_system_time(void);
+u32 mtk_dp_get_time_diff(u32 pre_time);
+u32 mtk_dp_read(struct mtk_dp *mtk_dp, u32 offset);
+int mtk_dp_update_bits(struct mtk_dp *mtk_dp, u32 offset, u32 val, u32 mas=
k);
+void mtk_dp_authentication(struct mtk_hdcp_info *hdcp_info);
+
+#endif /* _MTK_DP_H_ */
diff --git a/drivers/gpu/drm/mediatek/mtk_dp_hdcp2.c b/drivers/gpu/drm/medi=
atek/mtk_dp_hdcp2.c
new file mode 100644
index 000000000000..8528e33f3f49
--- /dev/null
+++ b/drivers/gpu/drm/mediatek/mtk_dp_hdcp2.c
@@ -0,0 +1,1021 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2019-2024 MediaTek Inc.
+ */
+
+#include "mtk_dp_hdcp2.h"
+#include "mtk_dp_reg.h"
+#include "mtk_dp.h"
+
+u8 t_rtx[HDCP_2_2_RTX_LEN] =3D {
+	0x18, 0xfa, 0xe4, 0x20, 0x6a, 0xfb, 0x51, 0x49
+};
+
+u8 t_tx_caps[HDCP_2_2_TXCAPS_LEN] =3D {
+	0x02, 0x00, 0x00
+};
+
+u8 t_rn[HDCP_2_2_RN_LEN] =3D {
+	0x32, 0x75, 0x3e, 0xa8, 0x78, 0xa6, 0x38, 0x1c
+};
+
+u8 t_riv[HDCP_2_2_RIV_LEN] =3D {
+	0x40, 0x2b, 0x6b, 0x43, 0xc5, 0xe8, 0x86, 0xd8
+};
+
+static void dp_tx_hdcp2_fill_stream_type(struct mtk_hdcp_info *hdcp_info, =
u8 uc_type)
+{
+	struct mtk_dp *mtk_dp =3D container_of(hdcp_info, struct mtk_dp, hdcp_inf=
o);
+
+	mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_34D0, uc_type, 0xff);
+}
+
+static void dp_tx_hdcp2_set_state(struct mtk_hdcp_info *hdcp_info, u8 main=
_state, u8 sub_state)
+{
+	hdcp_info->hdcp2_info.hdcp_handler.main_state =3D main_state;
+	hdcp_info->hdcp2_info.hdcp_handler.sub_state =3D sub_state;
+}
+
+static void dp_tx_hdcp2_set_auth_pass(struct mtk_hdcp_info *hdcp_info, boo=
l enable)
+{
+	struct mtk_dp *mtk_dp =3D container_of(hdcp_info, struct mtk_dp, hdcp_inf=
o);
+
+	if (enable) {
+		mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3400, BIT(11), BIT(11));
+		mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_34A4, BIT(4), BIT(4));
+	} else {
+		mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3400, 0, BIT(11));
+		mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_34A4, 0, BIT(4));
+	}
+}
+
+static void dp_tx_hdcp2_enable_auth(struct mtk_hdcp_info *hdcp_info, bool =
enable)
+{
+	struct mtk_dp *mtk_dp =3D container_of(hdcp_info, struct mtk_dp, hdcp_inf=
o);
+
+	DPTXHDCPFUNC();
+	dp_tx_hdcp2_set_auth_pass(hdcp_info, enable);
+	if (enable) {
+		u32 version =3D HDCP_V2_3;
+
+		if (hdcp_info->hdcp2_info.hdcp_rx.receiverid_list.rx_info[1] & BIT(0))
+			version =3D HDCP_V1;
+		else if (hdcp_info->hdcp2_info.hdcp_rx.receiverid_list.rx_info[1] & BIT(=
1))
+			version =3D HDCP_V2;
+
+		tee_hdcp_enable_encrypt(hdcp_info, enable, version);
+		mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3000, BIT(5), BIT(5));
+	} else {
+		tee_hdcp_enable_encrypt(hdcp_info, enable, HDCP_NONE);
+		mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3000, 0, BIT(5));
+	}
+}
+
+static int dp_tx_hdcp2_init(struct mtk_hdcp_info *hdcp_info)
+{
+	int err_code =3D HDCP_ERR_NONE;
+
+	DPTXHDCPFUNC();
+
+	memset(&hdcp_info->hdcp2_info.hdcp_tx, 0, sizeof(struct hdcp2_info_tx));
+	memset(&hdcp_info->hdcp2_info.hdcp_rx, 0, sizeof(struct hdcp2_info_rx));
+	memcpy(hdcp_info->hdcp2_info.hdcp_tx.ake_init.r_tx, t_rtx, HDCP_2_2_RTX_L=
EN);
+	memcpy(&hdcp_info->hdcp2_info.hdcp_tx.tx_caps, t_tx_caps, HDCP_2_2_TXCAPS=
_LEN);
+	memcpy(hdcp_info->hdcp2_info.hdcp_tx.lc_init.r_n, t_rn, HDCP_2_2_RN_LEN);
+	memcpy(hdcp_info->hdcp2_info.hdcp_tx.send_eks.riv, t_riv, HDCP_2_2_RIV_LE=
N);
+
+	memset(&hdcp_info->hdcp2_info.hdcp_handler, 0, sizeof(struct hdcp2_handle=
r));
+	memset(&hdcp_info->hdcp2_info.ake_stored_km, 0, sizeof(struct hdcp2_ake_s=
tored_km));
+
+	dp_tx_hdcp2_enable_auth(hdcp_info, false);
+
+	return err_code;
+}
+
+static bool dp_tx_hdcp2_inc_seq_num_m(struct mtk_hdcp_info *hdcp_info)
+{
+	u32 tmp =3D 0;
+
+	tmp =3D drm_hdcp_be24_to_cpu(hdcp_info->hdcp2_info.hdcp_tx.stream_manage.=
seq_num_m);
+
+	if (tmp =3D=3D 0xFFFFFF)
+		return false;
+
+	tmp++;
+
+	drm_hdcp_cpu_to_be24(hdcp_info->hdcp2_info.hdcp_tx.stream_manage.seq_num_=
m, tmp);
+	return true;
+}
+
+static bool dp_tx_hdcp2_process_rep_auth_stream_manage(struct mtk_hdcp_inf=
o *hdcp_info)
+{
+	bool ret =3D false;
+
+	hdcp_info->hdcp2_info.hdcp_tx.k[0] =3D 0x00;
+	hdcp_info->hdcp2_info.hdcp_tx.k[1] =3D 0x01;
+
+	hdcp_info->hdcp2_info.hdcp_tx.stream_id_type[0] =3D 0x00; //Payload ID
+	hdcp_info->hdcp2_info.hdcp_tx.stream_id_type[1] =3D hdcp_info->hdcp2_info=
.stream_id_type;
+
+	ret =3D dp_tx_hdcp2_inc_seq_num_m(hdcp_info);
+
+	return ret;
+}
+
+static bool dp_tx_hdcp2_recv_rep_auth_send_recv_id_list(struct mtk_hdcp_in=
fo *hdcp_info)
+{
+	bool ret =3D false;
+	u8 *buffer =3D NULL;
+	u32 len =3D 0, len_recv_id_list =3D 0;
+	int rc =3D 0;
+
+	len_recv_id_list =3D hdcp_info->hdcp2_info.device_count * HDCP_2_2_RECEIV=
ER_ID_LEN;
+	len =3D len_recv_id_list + HDCP_2_2_RXINFO_LEN + HDCP_2_2_SEQ_NUM_LEN;
+	buffer =3D kmalloc(len, GFP_KERNEL);
+	if (!buffer) {
+		pr_err("2.x: Out of Memory\n");
+		return ret;
+	}
+
+	memcpy(buffer, hdcp_info->hdcp2_info.hdcp_rx.receiverid_list.receiver_ids,
+	       len_recv_id_list);
+	memcpy(buffer + len_recv_id_list,
+	       hdcp_info->hdcp2_info.hdcp_rx.receiverid_list.rx_info, HDCP_2_2_RX=
INFO_LEN);
+	memcpy(buffer + len_recv_id_list + HDCP_2_2_RXINFO_LEN,
+	       hdcp_info->hdcp2_info.hdcp_rx.receiverid_list.seq_num_v, HDCP_2_2_=
SEQ_NUM_LEN);
+
+	rc =3D tee_hdcp2_compute_compare_v(hdcp_info, buffer, len,
+					 hdcp_info->hdcp2_info.hdcp_rx.receiverid_list.v_prime,
+		hdcp_info->hdcp2_info.hdcp_tx.send_ack.v);
+
+	if (rc =3D=3D RET_COMPARE_PASS) {
+		ret =3D true;
+		DPTXHDCPMSG("2.x: V' is PASS!!\n");
+	} else {
+		DPTXHDCPMSG("2.x: V' is FAIL!!\n");
+	}
+
+	kfree(buffer);
+	return ret;
+}
+
+static bool dp_tx_hdcp2_recv_rep_auth_stream_ready(struct mtk_hdcp_info *h=
dcp_info)
+{
+	bool ret =3D false;
+	u8 *buffer =3D NULL;
+	u32 len =3D 0;
+	int tmp =3D 0;
+
+	len =3D HDCP2_STREAMID_TYPE_LEN + HDCP_2_2_SEQ_NUM_LEN;
+	buffer =3D kmalloc(len, GFP_KERNEL);
+	if (!buffer) {
+		pr_err("2.x: Out of Memory\n");
+		return ret;
+	}
+
+	memcpy(buffer, hdcp_info->hdcp2_info.hdcp_tx.stream_id_type, HDCP2_STREAM=
ID_TYPE_LEN);
+	memcpy(buffer + HDCP2_STREAMID_TYPE_LEN,
+	       hdcp_info->hdcp2_info.hdcp_tx.stream_manage.seq_num_m,
+	       HDCP_2_2_SEQ_NUM_LEN);
+	tmp =3D tee_hdcp2_compute_compare_m(hdcp_info, buffer, len,
+					  hdcp_info->hdcp2_info.hdcp_rx.stream_ready.m_prime);
+
+	if (tmp =3D=3D RET_COMPARE_PASS) {
+		ret =3D true;
+		DPTXHDCPMSG("2.x: M' is PASS!!\n");
+	} else {
+		DPTXHDCPMSG("2.x: M' is FAIL!!\n");
+	}
+
+	kfree(buffer);
+	return ret;
+}
+
+static bool dp_tx_hdcp2_check_seq_num_v(struct mtk_hdcp_info *hdcp_info)
+{
+	if ((hdcp_info->hdcp2_info.hdcp_rx.receiverid_list.seq_num_v[0] =3D=3D 0x=
00 &&
+	     hdcp_info->hdcp2_info.hdcp_rx.receiverid_list.seq_num_v[1] =3D=3D 0x=
00 &&
+			hdcp_info->hdcp2_info.hdcp_rx.receiverid_list.seq_num_v[2] =3D=3D 0x00)=
 &&
+		hdcp_info->hdcp2_info.hdcp_handler.seq_num_v_cnt > 0xFFFFFF) {
+		DPTXHDCPMSG("2.x: SeqNumV Rollover!\n");
+		return false;
+	}
+
+	if ((hdcp_info->hdcp2_info.hdcp_rx.receiverid_list.seq_num_v[0]
+		!=3D (u8)((hdcp_info->hdcp2_info.hdcp_handler.seq_num_v_cnt & 0xFF0000) =
>> 16)) ||
+			(hdcp_info->hdcp2_info.hdcp_rx.receiverid_list.seq_num_v[1]
+		!=3D (u8)((hdcp_info->hdcp2_info.hdcp_handler.seq_num_v_cnt & 0x00FF00) =
>> 8)) ||
+			(hdcp_info->hdcp2_info.hdcp_rx.receiverid_list.seq_num_v[2]
+		!=3D (u8)((hdcp_info->hdcp2_info.hdcp_handler.seq_num_v_cnt & 0x0000FF))=
)) {
+		DPTXHDCPMSG("2.x: Invalid Seq_num_V!\n");
+		return false;
+	}
+
+	hdcp_info->hdcp2_info.hdcp_handler.seq_num_v_cnt++;
+	return true;
+}
+
+static void dp_tx_hdcp2_err_handle(struct mtk_hdcp_info *hdcp_info, int er=
r_msg, int line)
+{
+	pr_err("2.x: MainState:%d; SubState:%d;\n", hdcp_info->hdcp2_info.hdcp_ha=
ndler.main_state,
+	       hdcp_info->hdcp2_info.hdcp_handler.sub_state);
+
+	switch (err_msg) {
+	case HDCP_ERR_UNKNOWN_STATE:
+		pr_err("2.x: Unknown State, line:%d\n", line);
+		dp_tx_hdcp2_set_state(hdcp_info, HDCP2_MS_H1P1, HDCP_2_2_AUTH_FAIL);
+		break;
+
+	case HDCP_ERR_SEND_MSG_FAIL:
+		pr_err("2.x: Send Msg Fail, line:%d\n", line);
+		dp_tx_hdcp2_set_state(hdcp_info, HDCP2_MS_A0F0, HDCP_2_2_NULL_MSG);
+		break;
+	case HDCP_ERR_RESPONSE_TIMEROUT:
+		pr_err("2.x: Response Timeout, line:%d!\n", line);
+		dp_tx_hdcp2_set_state(hdcp_info, HDCP2_MS_A0F0, HDCP_2_2_NULL_MSG);
+		break;
+
+	case HDCP_ERR_PROCESS_FAIL:
+		pr_err("2.x: Process Fail, line:%d!\n", line);
+		dp_tx_hdcp2_set_state(hdcp_info, HDCP2_MS_A0F0, HDCP_2_2_NULL_MSG);
+		break;
+
+	default:
+		pr_err("2.x: NO ERROR!");
+		break;
+	}
+}
+
+static bool dp_tx_hdcp2_read_msg(struct mtk_hdcp_info *hdcp_info, u8 cmd_I=
D)
+{
+	struct mtk_dp *mtk_dp =3D container_of(hdcp_info, struct mtk_dp, hdcp_inf=
o);
+	bool ret =3D false;
+	u8 size =3D 0;
+
+	switch (cmd_ID) {
+	case HDCP_2_2_AKE_SEND_CERT:
+		drm_dp_dpcd_read(&mtk_dp->aux, DP_HDCP_2_2_REG_CERT_RX_OFFSET,
+				 (void *)&hdcp_info->hdcp2_info.hdcp_rx.cert_rx, HDCP2_CERTRX_LEN);
+		drm_dp_dpcd_read(&mtk_dp->aux, DP_HDCP_2_2_REG_RRX_OFFSET,
+				 hdcp_info->hdcp2_info.hdcp_rx.send_cert.r_rx, HDCP_2_2_RRX_LEN);
+		drm_dp_dpcd_read(&mtk_dp->aux, DP_HDCP_2_2_REG_RX_CAPS_OFFSET,
+				 hdcp_info->hdcp2_info.hdcp_rx.send_cert.rx_caps,
+				 HDCP_2_2_RXCAPS_LEN);
+
+		hdcp_info->hdcp2_info.read_certrx =3D false;
+		hdcp_info->hdcp2_info.hdcp_handler.recv_msg =3D true;
+		ret =3D true;
+		DPTXHDCPMSG("2.x: HDCP_2_2_AKE_SEND_CERT\n");
+		break;
+
+	case HDCP_2_2_AKE_SEND_HPRIME:
+		drm_dp_dpcd_read(&mtk_dp->aux, DP_HDCP_2_2_REG_HPRIME_OFFSET,
+				 hdcp_info->hdcp2_info.hdcp_rx.send_hprime.h_prime,
+				 HDCP_2_2_H_PRIME_LEN);
+
+		hdcp_info->hdcp2_info.read_h_prime =3D false;
+		hdcp_info->hdcp2_info.hdcp_handler.recv_msg =3D true;
+		ret =3D true;
+
+		DPTXHDCPMSG("2.x: HDCP_2_2_AKE_SEND_HPRIME\n");
+		break;
+
+	case HDCP_2_2_AKE_SEND_PAIRING_INFO:
+		drm_dp_dpcd_read(&mtk_dp->aux, DP_HDCP_2_2_REG_EKH_KM_RD_OFFSET,
+				 hdcp_info->hdcp2_info.hdcp_rx.pairing_info.e_kh_km,
+				 HDCP_2_2_E_KH_KM_LEN);
+		hdcp_info->hdcp2_info.read_pairing =3D false;
+		hdcp_info->hdcp2_info.hdcp_handler.recv_msg =3D true;
+		ret =3D true;
+		DPTXHDCPMSG("2.x: HDCP_2_2_AKE_SEND_PAIRING_INFO\n");
+		break;
+
+	case HDCP_2_2_LC_SEND_LPRIME:
+		drm_dp_dpcd_read(&mtk_dp->aux, DP_HDCP_2_2_REG_LPRIME_OFFSET,
+				 hdcp_info->hdcp2_info.hdcp_rx.send_lprime.l_prime,
+				 HDCP_2_2_L_PRIME_LEN);
+
+		hdcp_info->hdcp2_info.read_l_prime =3D false;
+		hdcp_info->hdcp2_info.hdcp_handler.recv_msg =3D true;
+		ret =3D true;
+		DPTXHDCPMSG("2.x: HDCP_2_2_LC_SEND_LPRIME\n");
+		break;
+
+	case HDCP_2_2_REP_SEND_RECVID_LIST:
+		drm_dp_dpcd_read(&mtk_dp->aux, DP_HDCP_2_2_REG_RXINFO_OFFSET,
+				 hdcp_info->hdcp2_info.hdcp_rx.receiverid_list.rx_info,
+				 HDCP_2_2_RXINFO_LEN);
+		hdcp_info->hdcp2_info.device_count =3D
+			((hdcp_info->hdcp2_info.hdcp_rx.receiverid_list.rx_info[1] & 0xf0) >> 4)
+				| ((hdcp_info->hdcp2_info.hdcp_rx.receiverid_list.rx_info[0]
+				& BIT(0)) << 4);
+
+		drm_dp_dpcd_read(&mtk_dp->aux, DP_HDCP_2_2_REG_SEQ_NUM_V_OFFSET,
+				 hdcp_info->hdcp2_info.hdcp_rx.receiverid_list.seq_num_v,
+				 HDCP_2_2_SEQ_NUM_LEN);
+		drm_dp_dpcd_read(&mtk_dp->aux, DP_HDCP_2_2_REG_VPRIME_OFFSET,
+				 hdcp_info->hdcp2_info.hdcp_rx.receiverid_list.v_prime,
+				 HDCP_2_2_V_PRIME_HALF_LEN);
+		drm_dp_dpcd_read(&mtk_dp->aux, DP_HDCP_2_2_REG_RECV_ID_LIST_OFFSET,
+				 hdcp_info->hdcp2_info.hdcp_rx.receiverid_list.receiver_ids,
+			hdcp_info->hdcp2_info.device_count * HDCP_2_2_RECEIVER_ID_LEN);
+
+		hdcp_info->hdcp2_info.read_v_prime =3D false;
+		hdcp_info->hdcp2_info.hdcp_handler.recv_msg =3D true;
+		ret =3D true;
+		DPTXHDCPMSG("2.x: HDCP_2_2_REP_SEND_RECVID_LIST\n");
+		break;
+
+	case HDCP_2_2_REP_STREAM_READY:
+		size =3D drm_dp_dpcd_read(&mtk_dp->aux, DP_HDCP_2_2_REG_MPRIME_OFFSET,
+					hdcp_info->hdcp2_info.hdcp_rx.stream_ready.m_prime,
+					HDCP_2_2_MPRIME_LEN);
+
+		if (size =3D=3D HDCP_2_2_MPRIME_LEN)
+			hdcp_info->hdcp2_info.hdcp_handler.recv_msg =3D true;
+		ret =3D true;
+		DPTXHDCPMSG("2.x: HDCP_2_2_REP_STREAM_READY\n");
+		break;
+
+	default:
+		DPTXHDCPMSG("2.x: Invalid DPTX_HDCP2_OffSETADDR_ReadMessage !\n");
+		break;
+	}
+
+	return ret;
+}
+
+static bool dp_tx_hdcp2_write_msg(struct mtk_hdcp_info *hdcp_info, u8 cmd_=
ID)
+{
+	struct mtk_dp *mtk_dp =3D container_of(hdcp_info, struct mtk_dp, hdcp_inf=
o);
+	bool ret =3D false;
+
+	switch (cmd_ID) {
+	case HDCP_2_2_AKE_INIT:
+		tee_hdcp2_soft_rst(hdcp_info);
+		drm_dp_dpcd_write(&mtk_dp->aux, DP_HDCP_2_2_REG_RTX_OFFSET,
+				  hdcp_info->hdcp2_info.hdcp_tx.ake_init.r_tx, HDCP_2_2_RTX_LEN);
+		drm_dp_dpcd_write(&mtk_dp->aux, DP_HDCP_2_2_REG_TXCAPS_OFFSET,
+				  (void *)&hdcp_info->hdcp2_info.hdcp_tx.tx_caps,
+				  HDCP_2_2_TXCAPS_LEN);
+
+		ret =3D true;
+		DPTXHDCPMSG("2.x: HDCP_2_2_AKE_Init !\n");
+		break;
+
+	case HDCP_2_2_AKE_NO_STORED_KM:
+		drm_dp_dpcd_write(&mtk_dp->aux, DP_HDCP_2_2_REG_EKPUB_KM_OFFSET,
+				  hdcp_info->hdcp2_info.hdcp_tx.no_stored_km.e_kpub_km,
+				  HDCP_2_2_E_KPUB_KM_LEN);
+
+		ret =3D true;
+
+		DPTXHDCPMSG("2.x: HDCP_2_2_AKE_NO_STORED_KM !\n");
+		break;
+
+	case HDCP_2_2_AKE_STORED_KM:
+		drm_dp_dpcd_write(&mtk_dp->aux, DP_HDCP_2_2_REG_EKH_KM_WR_OFFSET,
+				  hdcp_info->hdcp2_info.ake_stored_km.e_kh_km_m,
+				  HDCP_2_2_E_KH_KM_LEN);
+		drm_dp_dpcd_write(&mtk_dp->aux, DP_HDCP_2_2_REG_M_OFFSET,
+				  hdcp_info->hdcp2_info.ake_stored_km.e_kh_km_m +
+				  HDCP_2_2_E_KH_KM_LEN,
+				  HDCP_2_2_E_KH_KM_M_LEN - HDCP_2_2_E_KH_KM_LEN);
+
+		ret =3D true;
+
+		DPTXHDCPMSG("2.x: DPTX_HDCP_2_2_AKE_STORED_KM !\n");
+		break;
+
+	case HDCP_2_2_LC_INIT:
+		drm_dp_dpcd_write(&mtk_dp->aux, DP_HDCP_2_2_REG_RN_OFFSET,
+				  hdcp_info->hdcp2_info.hdcp_tx.lc_init.r_n, HDCP_2_2_RN_LEN);
+
+		hdcp_info->hdcp2_info.read_l_prime =3D true;
+		ret =3D true;
+
+		DPTXHDCPMSG("2.x: HDCP_2_2_LC_INIT !\n");
+		break;
+
+	case HDCP_2_2_SKE_SEND_EKS:
+		drm_dp_dpcd_write(&mtk_dp->aux, DP_HDCP_2_2_REG_EDKEY_KS_OFFSET,
+				  hdcp_info->hdcp2_info.hdcp_tx.send_eks.e_dkey_ks,
+				  HDCP_2_2_E_DKEY_KS_LEN);
+		drm_dp_dpcd_write(&mtk_dp->aux, DP_HDCP_2_2_REG_RIV_OFFSET,
+				  hdcp_info->hdcp2_info.hdcp_tx.send_eks.riv, HDCP_2_2_RIV_LEN);
+
+		hdcp_info->hdcp2_info.ks_exchange_done =3D true;
+
+		ret =3D true;
+		DPTXHDCPMSG("2.x: HDCP_2_2_SKE_SEND_EKS !\n");
+		break;
+
+	case HDCP_2_2_STREAM_TYPE:
+		drm_dp_dpcd_write(&mtk_dp->aux, DP_HDCP_2_2_REG_STREAM_TYPE_OFFSET,
+				  hdcp_info->hdcp2_info.hdcp_tx.stream_id_type, 1);
+
+		ret =3D true;
+		DPTXHDCPMSG("HDCP2_MSG_DP_STREAM_TYPE !\n");
+		break;
+
+	case HDCP_2_2_REP_SEND_ACK:
+		drm_dp_dpcd_write(&mtk_dp->aux, DP_HDCP_2_2_REG_V_OFFSET,
+				  hdcp_info->hdcp2_info.hdcp_tx.send_ack.v,
+				  HDCP_2_2_V_PRIME_HALF_LEN);
+
+		ret =3D true;
+		DPTXHDCPMSG("2.x: HDCP_2_2_SEND_ACK !\n");
+		break;
+
+	case HDCP_2_2_REP_STREAM_MANAGE:
+		drm_dp_dpcd_write(&mtk_dp->aux, DP_HDCP_2_2_REG_SEQ_NUM_M_OFFSET,
+				  hdcp_info->hdcp2_info.hdcp_tx.stream_manage.seq_num_m,
+				  HDCP_2_2_SEQ_NUM_LEN);
+		drm_dp_dpcd_write(&mtk_dp->aux, DP_HDCP_2_2_REG_K_OFFSET,
+				  hdcp_info->hdcp2_info.hdcp_tx.k, HDCP2_K_LEN);
+		drm_dp_dpcd_write(&mtk_dp->aux, DP_HDCP_2_2_REG_STREAM_ID_TYPE_OFFSET,
+				  hdcp_info->hdcp2_info.hdcp_tx.stream_id_type,
+				  HDCP2_STREAMID_TYPE_LEN);
+
+		dp_tx_hdcp2_fill_stream_type(hdcp_info, hdcp_info->hdcp2_info.stream_id_=
type);
+
+		ret =3D true;
+		DPTXHDCPMSG("2.x: HDCP_2_2_STREAM_MANAGE !\n");
+		break;
+
+	default:
+		DPTXHDCPMSG("2.x: Invalid HDCP2_OffSETADDR_WriteMessage !\n");
+		break;
+	}
+
+	return ret;
+}
+
+static void dp_tx_hdcp2_rest_variable(struct mtk_hdcp_info *hdcp_info)
+{
+	hdcp_info->hdcp2_info.read_certrx =3D false;
+	hdcp_info->hdcp2_info.read_h_prime =3D false;
+	hdcp_info->hdcp2_info.read_pairing =3D false;
+	hdcp_info->hdcp2_info.read_l_prime =3D false;
+	hdcp_info->hdcp2_info.ks_exchange_done =3D false;
+	hdcp_info->hdcp2_info.read_v_prime =3D false;
+}
+
+int dp_tx_hdcp2_fsm(struct mtk_hdcp_info *hdcp_info)
+{
+	static u32 timeout_value;
+	static u8 pre_main;
+	static u8 pre_sub;
+	static u32 pre_time;
+	int err_code =3D HDCP_ERR_NONE;
+	bool stored =3D false;
+	u32 time;
+	int ret =3D 0;
+	bool tmp =3D false;
+
+	if (pre_main !=3D hdcp_info->hdcp2_info.hdcp_handler.main_state ||
+	    hdcp_info->hdcp2_info.hdcp_handler.sub_state !=3D pre_sub) {
+		DPTXHDCPMSG("2.x: Port(M : S)=3D (%d, %d)",
+			    hdcp_info->hdcp2_info.hdcp_handler.main_state,
+			    hdcp_info->hdcp2_info.hdcp_handler.sub_state);
+		pre_main =3D hdcp_info->hdcp2_info.hdcp_handler.main_state;
+		pre_sub =3D hdcp_info->hdcp2_info.hdcp_handler.sub_state;
+	}
+
+	switch (hdcp_info->hdcp2_info.hdcp_handler.main_state) {
+	case HDCP2_MS_H1P1:
+		/* HDCP2_MS_H1P1 */
+		/* HDCP_2_2_AUTH_FAIL */
+		if (hdcp_info->hdcp2_info.hdcp_handler.sub_state =3D=3D HDCP_2_2_AUTH_FA=
IL) {
+			pr_err("2.x: Authentication Fail!\n");
+			dp_tx_hdcp2_enable_auth(hdcp_info, false);
+			hdcp_info->auth_status =3D AUTH_FAIL;
+		}
+		break;
+
+	case HDCP2_MS_A0F0:
+		/* HDCP2_MS_A0F0 */
+		/* HDCP_2_2_NULL_MSG */
+		if (hdcp_info->hdcp2_info.hdcp_handler.sub_state =3D=3D HDCP_2_2_NULL_MS=
G) {
+			if (!hdcp_info->hdcp2_info.enable) {
+				dp_tx_hdcp2_set_state(hdcp_info, HDCP2_MS_H1P1, HDCP_2_2_AUTH_FAIL);
+				DPTXHDCPMSG("2.x: Sink Doesn't Support Hdcp2x!\n");
+				break;
+			}
+
+			dp_tx_hdcp2_init(hdcp_info);
+			dp_tx_hdcp2_set_state(hdcp_info, HDCP2_MS_A1F1, HDCP_2_2_NULL_MSG);
+			DPTXHDCPMSG("2.x: Sink Support Hdcp2x!\n");
+		}
+		break;
+
+	case HDCP2_MS_A1F1:
+		/* HDCP2_MS_A1F1 */
+		/* HDCP_2_2_NULL_MSG */
+		if (hdcp_info->hdcp2_info.hdcp_handler.sub_state =3D=3D HDCP_2_2_NULL_MS=
G) {
+			if (hdcp_info->hdcp2_info.retry_count >=3D HDCP2_TX_RETRY_CNT) {
+				dp_tx_hdcp2_set_state(hdcp_info, HDCP2_MS_H1P1, HDCP_2_2_AUTH_FAIL);
+				pr_err("2.x: Try Max Count\n");
+				break;
+			}
+
+			hdcp_info->hdcp2_info.retry_count++;
+			dp_tx_hdcp2_set_state(hdcp_info, HDCP2_MS_A1F1, HDCP_2_2_AKE_INIT);
+		}
+
+		/* HDCP2_MS_A1F1 */
+		/* HDCP_2_2_AKE_INIT */
+		if (hdcp_info->hdcp2_info.hdcp_handler.sub_state =3D=3D HDCP_2_2_AKE_INI=
T) {
+			tmp =3D dp_tx_hdcp2_write_msg(hdcp_info, HDCP_2_2_AKE_INIT);
+			if (!tmp) {
+				err_code =3D HDCP_ERR_SEND_MSG_FAIL;
+				dp_tx_hdcp2_err_handle(hdcp_info, err_code, __LINE__);
+				break;
+			}
+			dp_tx_hdcp2_rest_variable(hdcp_info);
+			hdcp_info->hdcp2_info.read_certrx =3D true;
+
+			hdcp_info->hdcp2_info.hdcp_handler.send_ake_init =3D true;
+			dp_tx_hdcp2_set_state(hdcp_info, HDCP2_MS_A1F1, HDCP_2_2_AKE_SEND_CERT);
+			pre_time =3D mtk_dp_get_system_time();
+		}
+
+		/* HDCP2_MS_A1F1 */
+		/* HDCP_2_2_AKE_SEND_CERT */
+		if (hdcp_info->hdcp2_info.hdcp_handler.sub_state =3D=3D HDCP_2_2_AKE_SEN=
D_CERT) {
+			time =3D mtk_dp_get_time_diff(pre_time);
+			if (time < HDCP_2_2_CERT_TIMEOUT_MS) {
+				msleep(20);
+				break;
+			}
+			if (hdcp_info->hdcp2_info.read_certrx)
+				dp_tx_hdcp2_read_msg(hdcp_info, HDCP_2_2_AKE_SEND_CERT);
+
+			if (!hdcp_info->hdcp2_info.hdcp_handler.recv_msg)
+				break;
+
+			ret =3D tee_ake_certificate(hdcp_info,
+						  (u8 *)&hdcp_info->hdcp2_info.hdcp_rx.cert_rx,
+						  &stored,
+				hdcp_info->hdcp2_info.ake_stored_km.e_kh_km_m +
+				HDCP_2_2_E_KH_KM_LEN,
+				hdcp_info->hdcp2_info.ake_stored_km.e_kh_km_m);
+
+			if (ret !=3D RET_COMPARE_PASS) {
+				err_code =3D HDCP_ERR_PROCESS_FAIL;
+				dp_tx_hdcp2_err_handle(hdcp_info, err_code, __LINE__);
+				break;
+			}
+
+			hdcp_info->hdcp2_info.hdcp_handler.stored_km =3D stored;
+			hdcp_info->hdcp2_info.hdcp_handler.recv_msg =3D false;
+			dp_tx_hdcp2_set_state(hdcp_info, HDCP2_MS_A1F1,
+					      hdcp_info->hdcp2_info.hdcp_handler.stored_km ?
+					HDCP_2_2_AKE_STORED_KM :
+					HDCP_2_2_AKE_NO_STORED_KM);
+		}
+
+		/* HDCP2_MS_A1F1 */
+		/* HDCP_2_2_AKE_NO_STORED_KM */
+		if (hdcp_info->hdcp2_info.hdcp_handler.sub_state =3D=3D HDCP_2_2_AKE_NO_=
STORED_KM) {
+			DPTXHDCPMSG("2.x: Get Km, derive Ekpub(km)\n");
+
+			tee_enc_rsaes_oaep(hdcp_info,
+					   hdcp_info->hdcp2_info.hdcp_tx.no_stored_km.e_kpub_km);
+			/* Prepare e_kpub_km to send */
+			tmp =3D dp_tx_hdcp2_write_msg(hdcp_info, HDCP_2_2_AKE_NO_STORED_KM);
+			if (!tmp) {
+				err_code =3D HDCP_ERR_SEND_MSG_FAIL;
+				dp_tx_hdcp2_err_handle(hdcp_info, err_code, __LINE__);
+				break;
+			}
+
+			dp_tx_hdcp2_set_state(hdcp_info, HDCP2_MS_A1F1, HDCP_2_2_AKE_SEND_HPRIM=
E);
+			timeout_value =3D HDCP_2_2_HPRIME_NO_PAIRED_TIMEOUT_MS;
+			hdcp_info->hdcp2_info.hdcp_handler.recv_msg =3D false;
+			pre_time =3D mtk_dp_get_system_time();
+		}
+
+		/* HDCP2_MS_A1F1 */
+		/* HDCP_2_2_AKE_STORED_KM */
+		if (hdcp_info->hdcp2_info.hdcp_handler.sub_state =3D=3D HDCP_2_2_AKE_STO=
RED_KM) {
+			/* Prepare ekh_km & M to send */
+			tmp =3D dp_tx_hdcp2_write_msg(hdcp_info, HDCP_2_2_AKE_STORED_KM);
+			if (!tmp) {
+				err_code =3D HDCP_ERR_SEND_MSG_FAIL;
+				dp_tx_hdcp2_err_handle(hdcp_info, err_code, __LINE__);
+				break;
+			}
+
+			err_code =3D HDCP_ERR_NONE;
+			dp_tx_hdcp2_set_state(hdcp_info, HDCP2_MS_A1F1, HDCP_2_2_AKE_SEND_HPRIM=
E);
+			timeout_value =3D HDCP_2_2_HPRIME_PAIRED_TIMEOUT_MS;
+			hdcp_info->hdcp2_info.hdcp_handler.recv_msg =3D false;
+			pre_time =3D mtk_dp_get_system_time();
+		}
+
+		/* HDCP2_MS_A1F1 */
+		/* HDCP_2_2_AKE_SEND_HPRIME */
+		if (hdcp_info->hdcp2_info.hdcp_handler.sub_state =3D=3D HDCP_2_2_AKE_SEN=
D_HPRIME) {
+			if (hdcp_info->hdcp2_info.read_h_prime)
+				dp_tx_hdcp2_read_msg(hdcp_info, HDCP_2_2_AKE_SEND_HPRIME);
+
+			time =3D mtk_dp_get_time_diff(pre_time);
+			if (time > timeout_value) {
+				err_code =3D HDCP_ERR_RESPONSE_TIMEROUT;
+				dp_tx_hdcp2_err_handle(hdcp_info, err_code, __LINE__);
+				break;
+			}
+
+			if (!hdcp_info->hdcp2_info.hdcp_handler.recv_msg)
+				break;
+
+			ret =3D tee_ake_h_prime(hdcp_info,
+					      hdcp_info->hdcp2_info.hdcp_tx.ake_init.r_tx,
+					      hdcp_info->hdcp2_info.hdcp_rx.send_cert.r_rx,
+				hdcp_info->hdcp2_info.hdcp_rx.send_cert.rx_caps,
+				(u8 *)&hdcp_info->hdcp2_info.hdcp_tx.tx_caps,
+				hdcp_info->hdcp2_info.hdcp_rx.send_hprime.h_prime,
+				HDCP_2_2_H_PRIME_LEN);
+			if (ret !=3D RET_COMPARE_PASS) {
+				if (hdcp_info->hdcp2_info.hdcp_handler.stored_km)
+					tee_clear_paring(hdcp_info);
+				err_code =3D HDCP_ERR_PROCESS_FAIL;
+				dp_tx_hdcp2_err_handle(hdcp_info, err_code, __LINE__);
+				break;
+			}
+
+			if (hdcp_info->hdcp2_info.hdcp_handler.stored_km)
+				dp_tx_hdcp2_set_state(hdcp_info, HDCP2_MS_A2F2, HDCP_2_2_LC_INIT);
+			else
+				dp_tx_hdcp2_set_state(hdcp_info, HDCP2_MS_A1F1,
+						      HDCP_2_2_AKE_SEND_PAIRING_INFO);
+
+			pre_time =3D mtk_dp_get_system_time();
+			hdcp_info->hdcp2_info.hdcp_handler.recv_msg =3D false;
+		}
+
+		/* HDCP2_MS_A1F1 */
+		/* HDCP_2_2_AKE_SEND_PAIRING_INFO */
+		if (hdcp_info->hdcp2_info.hdcp_handler.sub_state =3D=3D
+			HDCP_2_2_AKE_SEND_PAIRING_INFO) {
+			if (hdcp_info->hdcp2_info.read_pairing)
+				dp_tx_hdcp2_read_msg(hdcp_info, HDCP_2_2_AKE_SEND_PAIRING_INFO);
+
+			/* Ekh_Km must be available less than 200ms, Give mode time for some Rx=
 */
+			time =3D mtk_dp_get_time_diff(pre_time);
+			if (time >	HDCP_2_2_PAIRING_TIMEOUT_MS * 2) {
+				err_code =3D HDCP_ERR_RESPONSE_TIMEROUT;
+				dp_tx_hdcp2_err_handle(hdcp_info, err_code, __LINE__);
+				break;
+			}
+
+			if (!hdcp_info->hdcp2_info.hdcp_handler.recv_msg)
+				break;
+
+			/* Store m, km, Ekh(km) */
+			tee_ake_paring(hdcp_info,
+				       hdcp_info->hdcp2_info.hdcp_rx.pairing_info.e_kh_km);
+
+			hdcp_info->hdcp2_info.hdcp_handler.send_pair =3D true;
+			hdcp_info->hdcp2_info.hdcp_handler.recv_msg =3D false;
+			dp_tx_hdcp2_set_state(hdcp_info, HDCP2_MS_A2F2, HDCP_2_2_LC_INIT);
+			pre_time =3D mtk_dp_get_system_time();
+		}
+		break;
+
+	case HDCP2_MS_A2F2:
+		/* HDCP2_MS_A2F2 */
+		/* HDCP_2_2_LC_INIT */
+		if (hdcp_info->hdcp2_info.hdcp_handler.sub_state =3D=3D HDCP_2_2_LC_INIT=
) {
+			/* prepare Rn to send */
+			tmp =3D dp_tx_hdcp2_write_msg(hdcp_info, HDCP_2_2_LC_INIT);
+			if (!tmp) {
+				err_code =3D HDCP_ERR_SEND_MSG_FAIL;
+				dp_tx_hdcp2_err_handle(hdcp_info, err_code, __LINE__);
+				break;
+			}
+			hdcp_info->hdcp2_info.hdcp_handler.send_lc_init =3D true;
+
+			dp_tx_hdcp2_set_state(hdcp_info, HDCP2_MS_A2F2, HDCP_2_2_LC_SEND_LPRIME=
);
+			pre_time =3D mtk_dp_get_system_time();
+		}
+
+		/* HDCP2_MS_A2F2 */
+		/* HDCP_2_2_LC_SEND_LPRIME */
+		if (hdcp_info->hdcp2_info.hdcp_handler.sub_state =3D=3D HDCP_2_2_LC_SEND=
_LPRIME) {
+			time =3D mtk_dp_get_time_diff(pre_time);
+			if (time < HDCP_2_2_DP_HPRIME_READ_TIMEOUT_MS)
+				break;
+
+			if (hdcp_info->hdcp2_info.read_l_prime)
+				dp_tx_hdcp2_read_msg(hdcp_info, HDCP_2_2_LC_SEND_LPRIME);
+
+			if (!hdcp_info->hdcp2_info.hdcp_handler.recv_msg)
+				break;
+
+			ret =3D tee_lc_l_prime(hdcp_info, hdcp_info->hdcp2_info.hdcp_tx.lc_init=
.r_n,
+					     hdcp_info->hdcp2_info.hdcp_rx.send_lprime.l_prime,
+					     HDCP_2_2_L_PRIME_LEN);
+			if (ret !=3D RET_COMPARE_PASS) {
+				err_code =3D HDCP_ERR_PROCESS_FAIL;
+				dp_tx_hdcp2_err_handle(hdcp_info, err_code, __LINE__);
+				break;
+			}
+
+			DPTXHDCPMSG("2.x: L' is PASS!!\n");
+			hdcp_info->hdcp2_info.hdcp_handler.recv_msg =3D false;
+			dp_tx_hdcp2_set_state(hdcp_info, HDCP2_MS_A3F3, HDCP_2_2_NULL_MSG);
+			pre_time =3D mtk_dp_get_system_time();
+		}
+		break;
+
+	case HDCP2_MS_A3F3:
+		/* HDCP2_MS_A3F3 */
+		/* HDCP_2_2_NULL_MSG */
+		if (hdcp_info->hdcp2_info.hdcp_handler.sub_state =3D=3D HDCP_2_2_NULL_MS=
G) {
+			tee_ske_enc_ks(hdcp_info, hdcp_info->hdcp2_info.hdcp_tx.send_eks.riv,
+				       hdcp_info->hdcp2_info.hdcp_tx.send_eks.e_dkey_ks);
+
+			tmp =3D dp_tx_hdcp2_write_msg(hdcp_info, HDCP_2_2_SKE_SEND_EKS);
+			if (!tmp) {
+				err_code =3D HDCP_ERR_SEND_MSG_FAIL;
+				dp_tx_hdcp2_err_handle(hdcp_info, err_code, __LINE__);
+				break;
+			}
+
+			if (!hdcp_info->hdcp2_info.repeater)
+				dp_tx_hdcp2_write_msg(hdcp_info, HDCP_2_2_STREAM_TYPE);
+
+			dp_tx_hdcp2_set_state(hdcp_info, HDCP2_MS_A3F3, HDCP_2_2_SKE_SEND_EKS);
+			pre_time =3D mtk_dp_get_system_time();
+		}
+
+		/* HDCP2_MS_A3F3 */
+		/* HDCP_2_2_SKE_SEND_EKS */
+		if (hdcp_info->hdcp2_info.hdcp_handler.sub_state =3D=3D HDCP_2_2_SKE_SEN=
D_EKS) {
+			time =3D mtk_dp_get_time_diff(pre_time);
+			if (time >=3D HDCP_2_2_DELAY_BEFORE_ENCRYPTION_EN)
+				dp_tx_hdcp2_set_state(hdcp_info, HDCP2_MS_A4F4, HDCP_2_2_NULL_MSG);
+		}
+		break;
+
+	case HDCP2_MS_A4F4:
+		/* HDCP2_MS_A4F4 */
+		/* HDCP_2_2_NULL_MSG */
+		if (hdcp_info->hdcp2_info.hdcp_handler.sub_state =3D=3D HDCP_2_2_NULL_MS=
G) {
+			if (!hdcp_info->hdcp2_info.repeater) {
+				dp_tx_hdcp2_set_state(hdcp_info, HDCP2_MS_A5F5, HDCP_2_2_AUTH_DONE);
+				break;
+			}
+			dp_tx_hdcp2_set_state(hdcp_info, HDCP2_MS_A6F6,
+					      HDCP_2_2_REP_SEND_RECVID_LIST);
+			hdcp_info->hdcp2_info.hdcp_handler.recv_msg =3D false;
+			pre_time =3D mtk_dp_get_system_time();
+		}
+		break;
+
+	case HDCP2_MS_A5F5:
+		/* HDCP2_MS_A5F5 */
+		/* HDCP_2_2_AUTH_DONE */
+		if (hdcp_info->hdcp2_info.hdcp_handler.sub_state =3D=3D HDCP_2_2_AUTH_DO=
NE) {
+			DPTXHDCPMSG("2.x: Authentication done!\n");
+			hdcp_info->auth_status =3D AUTH_PASS;
+			hdcp_info->hdcp2_info.retry_count =3D 0;
+			dp_tx_hdcp2_set_state(hdcp_info, HDCP2_MS_A5F5, HDCP_2_2_NULL_MSG);
+			dp_tx_hdcp2_enable_auth(hdcp_info, true);
+		}
+		break;
+
+	case HDCP2_MS_A6F6:
+		/* HDCP2_MS_A6F6 */
+		/* HDCP_2_2_REP_SEND_RECVID_LIST */
+		if (hdcp_info->hdcp2_info.hdcp_handler.sub_state =3D=3D
+			HDCP_2_2_REP_SEND_RECVID_LIST) {
+			if (hdcp_info->hdcp2_info.read_v_prime)
+				dp_tx_hdcp2_read_msg(hdcp_info, HDCP_2_2_REP_SEND_RECVID_LIST);
+
+			time =3D mtk_dp_get_time_diff(pre_time);
+			if (time > HDCP_2_2_RECVID_LIST_TIMEOUT_MS) {
+				err_code =3D HDCP_ERR_RESPONSE_TIMEROUT;
+				dp_tx_hdcp2_err_handle(hdcp_info, err_code, __LINE__);
+				break;
+			}
+
+			if (!hdcp_info->hdcp2_info.hdcp_handler.recv_msg)
+				break;
+
+			pre_time =3D mtk_dp_get_system_time();
+			hdcp_info->hdcp2_info.hdcp_handler.recv_msg =3D false;
+			dp_tx_hdcp2_set_state(hdcp_info, HDCP2_MS_A7F7,
+					      HDCP_2_2_REP_VERIFY_RECVID_LIST);
+		}
+		break;
+
+	case HDCP2_MS_A7F7:
+		/* HDCP2_MS_A7F7 */
+		/* HDCP_2_2_REP_VERIFY_RECVID_LIST */
+		if (hdcp_info->hdcp2_info.hdcp_handler.sub_state =3D=3D
+			HDCP_2_2_REP_VERIFY_RECVID_LIST) {
+			if ((hdcp_info->hdcp2_info.hdcp_rx.receiverid_list.rx_info[1]
+				& (BIT(2) | BIT(3))) !=3D 0) {
+				pr_err("2.x: DEVS_EXCEEDED or CASCADE_EXCEDDED!\n");
+				err_code =3D HDCP_ERR_PROCESS_FAIL;
+				dp_tx_hdcp2_err_handle(hdcp_info, err_code, __LINE__);
+				break;
+			}
+
+			/* check seqNumV here */
+			tmp =3D dp_tx_hdcp2_check_seq_num_v(hdcp_info);
+			if (!tmp) {
+				err_code =3D HDCP_ERR_PROCESS_FAIL;
+				dp_tx_hdcp2_err_handle(hdcp_info, err_code, __LINE__);
+				break;
+			}
+
+			tmp =3D dp_tx_hdcp2_recv_rep_auth_send_recv_id_list(hdcp_info);
+			if (!tmp) {
+				err_code =3D HDCP_ERR_PROCESS_FAIL;
+				dp_tx_hdcp2_err_handle(hdcp_info, err_code, __LINE__);
+				break;
+			}
+
+			dp_tx_hdcp2_set_state(hdcp_info, HDCP2_MS_A8F8, HDCP_2_2_REP_SEND_ACK);
+		}
+		break;
+
+	case HDCP2_MS_A8F8:
+		/* HDCP2_MS_A8F8 */
+		/* HDCP_2_2_REP_SEND_ACK */
+		if (hdcp_info->hdcp2_info.hdcp_handler.sub_state =3D=3D HDCP_2_2_REP_SEN=
D_ACK) {
+			tmp =3D dp_tx_hdcp2_write_msg(hdcp_info, HDCP_2_2_REP_SEND_ACK);
+			if (!tmp) {
+				err_code =3D HDCP_ERR_SEND_MSG_FAIL;
+				dp_tx_hdcp2_err_handle(hdcp_info, err_code, __LINE__);
+				break;
+			}
+
+			time =3D mtk_dp_get_time_diff(pre_time);
+			if (time > HDCP2_REP_SEND_ACK) {
+				err_code =3D HDCP_ERR_RESPONSE_TIMEROUT;
+				dp_tx_hdcp2_err_handle(hdcp_info, err_code, __LINE__);
+				break;
+			}
+
+			dp_tx_hdcp2_set_state(hdcp_info, HDCP2_MS_A9F9, HDCP_2_2_REP_STREAM_MAN=
AGE);
+			hdcp_info->hdcp2_info.hdcp_handler.retry_cnt =3D 0;
+		}
+		break;
+
+	case HDCP2_MS_A9F9:
+		/* HDCP2_MS_A9F9 */
+		/* HDCP_2_2_REP_STREAM_MANAGE */
+		if (hdcp_info->hdcp2_info.hdcp_handler.sub_state =3D=3D HDCP_2_2_REP_STR=
EAM_MANAGE) {
+			tmp =3D dp_tx_hdcp2_process_rep_auth_stream_manage(hdcp_info);
+			if (!tmp) {
+				err_code =3D HDCP_ERR_PROCESS_FAIL;
+				dp_tx_hdcp2_err_handle(hdcp_info, err_code, __LINE__);
+				break;
+			}
+
+			tmp =3D dp_tx_hdcp2_write_msg(hdcp_info, HDCP_2_2_REP_STREAM_MANAGE);
+			if (!tmp) {
+				err_code =3D HDCP_ERR_SEND_MSG_FAIL;
+				dp_tx_hdcp2_err_handle(hdcp_info, err_code, __LINE__);
+				break;
+			}
+
+			pre_time =3D mtk_dp_get_system_time();
+			hdcp_info->hdcp2_info.hdcp_handler.recv_msg =3D false;
+			dp_tx_hdcp2_set_state(hdcp_info, HDCP2_MS_A9F9,
+					      HDCP_2_2_REP_STREAM_READY);
+		}
+
+		/* HDCP2_MS_A9F9 */
+		/* HDCP_2_2_REP_STREAM_READY */
+		if (hdcp_info->hdcp2_info.hdcp_handler.sub_state =3D=3D HDCP_2_2_REP_STR=
EAM_READY) {
+			time =3D mtk_dp_get_time_diff(pre_time);
+			if (time <=3D HDCP_2_2_STREAM_READY_TIMEOUT_MS / 2)
+				break;
+
+			dp_tx_hdcp2_read_msg(hdcp_info, HDCP_2_2_REP_STREAM_READY);
+
+			time =3D mtk_dp_get_time_diff(pre_time);
+			if (time > HDCP_2_2_STREAM_READY_TIMEOUT_MS) {
+				err_code =3D HDCP_ERR_RESPONSE_TIMEROUT;
+				dp_tx_hdcp2_err_handle(hdcp_info, err_code, __LINE__);
+				break;
+			}
+
+			if (!hdcp_info->hdcp2_info.hdcp_handler.recv_msg) {
+				if (hdcp_info->hdcp2_info.hdcp_handler.retry_cnt
+					>=3D HDCP2_STREAM_MANAGE_RETRY_CNT) {
+					err_code =3D HDCP_ERR_RESPONSE_TIMEROUT;
+					dp_tx_hdcp2_err_handle(hdcp_info, err_code, __LINE__);
+					break;
+				}
+
+				hdcp_info->hdcp2_info.hdcp_handler.retry_cnt++;
+
+				dp_tx_hdcp2_set_state(hdcp_info, HDCP2_MS_A9F9,
+						      HDCP_2_2_REP_STREAM_READY);
+				break;
+			}
+
+			tmp =3D dp_tx_hdcp2_recv_rep_auth_stream_ready(hdcp_info);
+			if (!tmp) {
+				err_code =3D HDCP_ERR_PROCESS_FAIL;
+				dp_tx_hdcp2_err_handle(hdcp_info, err_code, __LINE__);
+				break;
+			}
+
+			dp_tx_hdcp2_set_state(hdcp_info, HDCP2_MS_A5F5, HDCP_2_2_AUTH_DONE);
+		}
+		break;
+
+	default:
+		err_code =3D HDCP_ERR_UNKNOWN_STATE;
+		dp_tx_hdcp2_err_handle(hdcp_info, err_code, __LINE__);
+		break;
+	}
+
+	return err_code;
+}
+
+void dp_tx_hdcp2_set_start_auth(struct mtk_hdcp_info *hdcp_info, bool enab=
le)
+{
+	hdcp_info->hdcp2_info.enable =3D enable;
+
+	if (enable) {
+		hdcp_info->auth_status =3D AUTH_INIT;
+		dp_tx_hdcp2_set_state(hdcp_info, HDCP2_MS_A0F0, HDCP_2_2_NULL_MSG);
+	} else {
+		hdcp_info->auth_status =3D AUTH_ZERO;
+		dp_tx_hdcp2_set_state(hdcp_info, HDCP2_MS_H1P1, HDCP_2_2_NULL_MSG);
+		dp_tx_hdcp2_enable_auth(hdcp_info, false);
+	}
+
+	hdcp_info->hdcp2_info.retry_count =3D 0;
+}
+
+bool dp_tx_hdcp2_support(struct mtk_hdcp_info *hdcp_info)
+{
+	struct mtk_dp *mtk_dp =3D container_of(hdcp_info, struct mtk_dp, hdcp_inf=
o);
+	u8 tmp[3];
+	int ret;
+
+	drm_dp_dpcd_read(&mtk_dp->aux, DP_HDCP_2_2_REG_RX_CAPS_OFFSET, tmp, HDCP_=
2_2_RXCAPS_LEN);
+
+	if (HDCP_2_2_DP_HDCP_CAPABLE(tmp[2]) && tmp[0] =3D=3D HDCP_2_2_RX_CAPS_VE=
RSION_VAL) {
+		hdcp_info->hdcp2_info.enable =3D true;
+		hdcp_info->hdcp2_info.repeater =3D tmp[2] & BIT(0);
+	} else {
+		hdcp_info->hdcp2_info.enable =3D false;
+	}
+
+	DPTXHDCPMSG("2.x: CAPABLE: %d, Reapeater: %d\n", hdcp_info->hdcp2_info.en=
able,
+		    hdcp_info->hdcp2_info.repeater);
+
+	if (!hdcp_info->hdcp2_info.enable)
+		return false;
+
+	ret =3D tee_add_device(hdcp_info, HDCP_VERSION_2X);
+	if (ret !=3D RET_SUCCESS) {
+		pr_err("2.x: HDCP TA has some error\n");
+		hdcp_info->hdcp2_info.enable =3D false;
+	}
+
+	return hdcp_info->hdcp2_info.enable;
+}
+
+bool dp_tx_hdcp2_irq(struct mtk_hdcp_info *hdcp_info)
+{
+	struct mtk_dp *mtk_dp =3D container_of(hdcp_info, struct mtk_dp, hdcp_inf=
o);
+	u8 rx_status =3D 0;
+
+	drm_dp_dpcd_read(&mtk_dp->aux, DP_HDCP_2_2_REG_RXSTATUS_OFFSET, &rx_statu=
s,
+			 HDCP_2_2_DP_RXSTATUS_LEN);
+
+	if (rx_status & BIT(0)) {
+		DPTXHDCPMSG("2.x: READY_BIT0 Ready!\n");
+		hdcp_info->hdcp2_info.read_v_prime =3D true;
+	}
+
+	if (rx_status & BIT(1)) {
+		DPTXHDCPMSG("2.x: H'_AVAILABLE Ready!\n");
+		hdcp_info->hdcp2_info.read_h_prime =3D true;
+	}
+
+	if (rx_status & BIT(2)) {
+		DPTXHDCPMSG("2.x: PAIRING_AVAILABLE Ready!\n");
+		hdcp_info->hdcp2_info.read_pairing =3D true;
+	}
+
+	if (rx_status & BIT(4) || rx_status & BIT(3)) {
+		DPTXHDCPMSG("2.x: Re-Auth HDCP2X!\n");
+		dp_tx_hdcp2_set_start_auth(hdcp_info, true);
+		mtk_dp_authentication(hdcp_info);
+	}
+
+	return true;
+}
diff --git a/drivers/gpu/drm/mediatek/mtk_dp_hdcp2.h b/drivers/gpu/drm/medi=
atek/mtk_dp_hdcp2.h
new file mode 100644
index 000000000000..df309d3dcc6e
--- /dev/null
+++ b/drivers/gpu/drm/mediatek/mtk_dp_hdcp2.h
@@ -0,0 +1,52 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2019-2024 MediaTek Inc.
+ */
+
+#ifndef _MTK_dp_HDCP2_H_
+#define _MTK_dp_HDCP2_H_
+
+#include "tlc_dp_hdcp.h"
+
+/* Timeout relative */
+#define HDCP2_REP_SEND_ACK 2000
+
+/* Patch for QD980 LLCTS */
+#define HDCP2_TX_RETRY_CNT 3
+#define HDCP2_TX_LC_RETRY_CNT 1023
+#define HDCP2_STREAM_MANAGE_RETRY_CNT 8
+
+/* HDCP2.2 Msg IDs */
+#define HDCP_2_2_STREAM_TYPE 20
+#define HDCP_2_2_REP_VERIFY_RECVID_LIST 21
+#define HDCP_2_2_AUTH_FAIL 22
+#define HDCP_2_2_AUTH_DONE 23
+
+enum ENUM_HDCP2TX_MAIN_STATE {
+	HDCP2_MS_H1P1 =3D 0,
+	HDCP2_MS_A0F0 =3D 1,
+	HDCP2_MS_A1F1 =3D 2,
+	HDCP2_MS_A2F2 =3D 3,
+	HDCP2_MS_A3F3 =3D 4,
+	HDCP2_MS_A4F4 =3D 5,
+	HDCP2_MS_A5F5 =3D 6,
+	HDCP2_MS_A6F6 =3D 7,
+	HDCP2_MS_A7F7 =3D 8,
+	HDCP2_MS_A8F8 =3D 9,
+	HDCP2_MS_A9F9 =3D 10
+};
+
+enum ENUM_HDCP_ERR_CODE {
+	HDCP_ERR_NONE =3D 0,
+	HDCP_ERR_UNKNOWN_STATE,
+	HDCP_ERR_SEND_MSG_FAIL,
+	HDCP_ERR_RESPONSE_TIMEROUT,
+	HDCP_ERR_PROCESS_FAIL
+};
+
+int dp_tx_hdcp2_fsm(struct mtk_hdcp_info *hdcp_info);
+void dp_tx_hdcp2_set_start_auth(struct mtk_hdcp_info *hdcp_info, bool enab=
le);
+bool dp_tx_hdcp2_support(struct mtk_hdcp_info *hdcp_info);
+bool dp_tx_hdcp2_irq(struct mtk_hdcp_info *hdcp_info);
+
+#endif /* _MTK_dp_HDCP2_H_ */
diff --git a/drivers/gpu/drm/mediatek/mtk_dp_reg.h b/drivers/gpu/drm/mediat=
ek/mtk_dp_reg.h
index 709b79480693..5cf5059762ed 100644
--- a/drivers/gpu/drm/mediatek/mtk_dp_reg.h
+++ b/drivers/gpu/drm/mediatek/mtk_dp_reg.h
@@ -1,8 +1,9 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 /*
- * Copyright (c) 2019-2022 MediaTek Inc.
+ * Copyright (c) 2019-2024 MediaTek Inc.
  * Copyright (c) 2022 BayLibre
  */
+
 #ifndef _MTK_DP_REG_H_
 #define _MTK_DP_REG_H_
=20
@@ -277,6 +278,7 @@
 #define HPD_INT_THD_ECO_DP_TRANS_P0_HIGH_BOUND_EXT		BIT(1)
 #define MTK_DP_TRANS_P0_34A4				0x34a4
 #define LANE_NUM_DP_TRANS_P0_MASK				GENMASK(3, 2)
+#define MTK_DP_TRANS_P0_34D0                0x34D0
 #define MTK_DP_TRANS_P0_3540				0x3540
 #define FEC_EN_DP_TRANS_P0_MASK					BIT(0)
 #define FEC_CLOCK_EN_MODE_DP_TRANS_P0				BIT(3)
diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/=
mtk_dpi.c
index 4e3d9f7b4d8c..7f4a8f7dfce2 100644
--- a/drivers/gpu/drm/mediatek/mtk_dpi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
@@ -25,6 +25,7 @@
 #include <drm/drm_edid.h>
 #include <drm/drm_of.h>
 #include <drm/drm_simple_kms_helper.h>
+#include <drm/display/drm_hdcp_helper.h>
=20
 #include "mtk_disp_drv.h"
 #include "mtk_dpi_regs.h"
@@ -820,6 +821,8 @@ static int mtk_dpi_bind(struct device *dev, struct devi=
ce *master, void *data)
 	}
 	drm_connector_attach_encoder(dpi->connector, &dpi->encoder);
=20
+	drm_connector_attach_content_protection_property(dpi->connector, true);
+
 	return 0;
=20
 err_cleanup:
--=20
2.43.0