Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 2387 insertions, 0 deletions

diff --git a/drivers/gpu/drm/bridge/sil-sii8620.c b/drivers/gpu/drm/bridge/sil-sii8620.c
new file mode 100644
index 0000000000..599164e387
--- /dev/null
+++ b/drivers/gpu/drm/bridge/sil-sii8620.c
@@ -0,0 +1,2387 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Silicon Image SiI8620 HDMI/MHL bridge driver
+ *
+ * Copyright (C) 2015, Samsung Electronics Co., Ltd.
+ * Andrzej Hajda <a.hajda@samsung.com>
+ */
+
+#include <asm/unaligned.h>
+
+#include <drm/bridge/mhl.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_encoder.h>
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/extcon.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of_graph.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+
+#include <media/rc-core.h>
+
+#include "sil-sii8620.h"
+
+#define SII8620_BURST_BUF_LEN 288
+#define VAL_RX_HDMI_CTRL2_DEFVAL VAL_RX_HDMI_CTRL2_IDLE_CNT(3)
+
+#define MHL1_MAX_PCLK 75000
+#define MHL1_MAX_PCLK_PP_MODE 150000
+#define MHL3_MAX_PCLK 200000
+#define MHL3_MAX_PCLK_PP_MODE 300000
+
+enum sii8620_mode {
+	CM_DISCONNECTED,
+	CM_DISCOVERY,
+	CM_MHL1,
+	CM_MHL3,
+	CM_ECBUS_S
+};
+
+enum sii8620_sink_type {
+	SINK_NONE,
+	SINK_HDMI,
+	SINK_DVI
+};
+
+enum sii8620_mt_state {
+	MT_STATE_READY,
+	MT_STATE_BUSY,
+	MT_STATE_DONE
+};
+
+struct sii8620 {
+	struct drm_bridge bridge;
+	struct device *dev;
+	struct rc_dev *rc_dev;
+	struct clk *clk_xtal;
+	struct gpio_desc *gpio_reset;
+	struct gpio_desc *gpio_int;
+	struct regulator_bulk_data supplies[2];
+	struct mutex lock; /* context lock, protects fields below */
+	int error;
+	unsigned int use_packed_pixel:1;
+	enum sii8620_mode mode;
+	enum sii8620_sink_type sink_type;
+	u8 cbus_status;
+	u8 stat[MHL_DST_SIZE];
+	u8 xstat[MHL_XDS_SIZE];
+	u8 devcap[MHL_DCAP_SIZE];
+	u8 xdevcap[MHL_XDC_SIZE];
+	bool feature_complete;
+	bool devcap_read;
+	bool sink_detected;
+	struct edid *edid;
+	unsigned int gen2_write_burst:1;
+	enum sii8620_mt_state mt_state;
+	struct extcon_dev *extcon;
+	struct notifier_block extcon_nb;
+	struct work_struct extcon_wq;
+	int cable_state;
+	struct list_head mt_queue;
+	struct {
+		int r_size;
+		int r_count;
+		int rx_ack;
+		int rx_count;
+		u8 rx_buf[32];
+		int tx_count;
+		u8 tx_buf[32];
+	} burst;
+};
+
+struct sii8620_mt_msg;
+
+typedef void (*sii8620_mt_msg_cb)(struct sii8620 *ctx,
+				  struct sii8620_mt_msg *msg);
+
+typedef void (*sii8620_cb)(struct sii8620 *ctx, int ret);
+
+struct sii8620_mt_msg {
+	struct list_head node;
+	u8 reg[4];
+	u8 ret;
+	sii8620_mt_msg_cb send;
+	sii8620_mt_msg_cb recv;
+	sii8620_cb continuation;
+};
+
+static const u8 sii8620_i2c_page[] = {
+	0x39, /* Main System */
+	0x3d, /* TDM and HSIC */
+	0x49, /* TMDS Receiver, MHL EDID */
+	0x4d, /* eMSC, HDCP, HSIC */
+	0x5d, /* MHL Spec */
+	0x64, /* MHL CBUS */
+	0x59, /* Hardware TPI (Transmitter Programming Interface) */
+	0x61, /* eCBUS-S, eCBUS-D */
+};
+
+static void sii8620_fetch_edid(struct sii8620 *ctx);
+static void sii8620_set_upstream_edid(struct sii8620 *ctx);
+static void sii8620_enable_hpd(struct sii8620 *ctx);
+static void sii8620_mhl_disconnected(struct sii8620 *ctx);
+static void sii8620_disconnect(struct sii8620 *ctx);
+
+static int sii8620_clear_error(struct sii8620 *ctx)
+{
+	int ret = ctx->error;
+
+	ctx->error = 0;
+	return ret;
+}
+
+static void sii8620_read_buf(struct sii8620 *ctx, u16 addr, u8 *buf, int len)
+{
+	struct device *dev = ctx->dev;
+	struct i2c_client *client = to_i2c_client(dev);
+	u8 data = addr;
+	struct i2c_msg msg[] = {
+		{
+			.addr = sii8620_i2c_page[addr >> 8],
+			.flags = client->flags,
+			.len = 1,
+			.buf = &data
+		},
+		{
+			.addr = sii8620_i2c_page[addr >> 8],
+			.flags = client->flags | I2C_M_RD,
+			.len = len,
+			.buf = buf
+		},
+	};
+	int ret;
+
+	if (ctx->error)
+		return;
+
+	ret = i2c_transfer(client->adapter, msg, 2);
+	dev_dbg(dev, "read at %04x: %*ph, %d\n", addr, len, buf, ret);
+
+	if (ret != 2) {
+		dev_err(dev, "Read at %#06x of %d bytes failed with code %d.\n",
+			addr, len, ret);
+		ctx->error = ret < 0 ? ret : -EIO;
+	}
+}
+
+static u8 sii8620_readb(struct sii8620 *ctx, u16 addr)
+{
+	u8 ret = 0;
+
+	sii8620_read_buf(ctx, addr, &ret, 1);
+	return ret;
+}
+
+static void sii8620_write_buf(struct sii8620 *ctx, u16 addr, const u8 *buf,
+			      int len)
+{
+	struct device *dev = ctx->dev;
+	struct i2c_client *client = to_i2c_client(dev);
+	u8 data[2];
+	struct i2c_msg msg = {
+		.addr = sii8620_i2c_page[addr >> 8],
+		.flags = client->flags,
+		.len = len + 1,
+	};
+	int ret;
+
+	if (ctx->error)
+		return;
+
+	if (len > 1) {
+		msg.buf = kmalloc(len + 1, GFP_KERNEL);
+		if (!msg.buf) {
+			ctx->error = -ENOMEM;
+			return;
+		}
+		memcpy(msg.buf + 1, buf, len);
+	} else {
+		msg.buf = data;
+		msg.buf[1] = *buf;
+	}
+
+	msg.buf[0] = addr;
+
+	ret = i2c_transfer(client->adapter, &msg, 1);
+	dev_dbg(dev, "write at %04x: %*ph, %d\n", addr, len, buf, ret);
+
+	if (ret != 1) {
+		dev_err(dev, "Write at %#06x of %*ph failed with code %d.\n",
+			addr, len, buf, ret);
+		ctx->error = ret ?: -EIO;
+	}
+
+	if (len > 1)
+		kfree(msg.buf);
+}
+
+#define sii8620_write(ctx, addr, arr...) \
+({\
+	u8 d[] = { arr }; \
+	sii8620_write_buf(ctx, addr, d, ARRAY_SIZE(d)); \
+})
+
+static void __sii8620_write_seq(struct sii8620 *ctx, const u16 *seq, int len)
+{
+	int i;
+
+	for (i = 0; i < len; i += 2)
+		sii8620_write(ctx, seq[i], seq[i + 1]);
+}
+
+#define sii8620_write_seq(ctx, seq...) \
+({\
+	const u16 d[] = { seq }; \
+	__sii8620_write_seq(ctx, d, ARRAY_SIZE(d)); \
+})
+
+#define sii8620_write_seq_static(ctx, seq...) \
+({\
+	static const u16 d[] = { seq }; \
+	__sii8620_write_seq(ctx, d, ARRAY_SIZE(d)); \
+})
+
+static void sii8620_setbits(struct sii8620 *ctx, u16 addr, u8 mask, u8 val)
+{
+	val = (val & mask) | (sii8620_readb(ctx, addr) & ~mask);
+	sii8620_write(ctx, addr, val);
+}
+
+static inline bool sii8620_is_mhl3(struct sii8620 *ctx)
+{
+	return ctx->mode >= CM_MHL3;
+}
+
+static void sii8620_mt_cleanup(struct sii8620 *ctx)
+{
+	struct sii8620_mt_msg *msg, *n;
+
+	list_for_each_entry_safe(msg, n, &ctx->mt_queue, node) {
+		list_del(&msg->node);
+		kfree(msg);
+	}
+	ctx->mt_state = MT_STATE_READY;
+}
+
+static void sii8620_mt_work(struct sii8620 *ctx)
+{
+	struct sii8620_mt_msg *msg;
+
+	if (ctx->error)
+		return;
+	if (ctx->mt_state == MT_STATE_BUSY || list_empty(&ctx->mt_queue))
+		return;
+
+	if (ctx->mt_state == MT_STATE_DONE) {
+		ctx->mt_state = MT_STATE_READY;
+		msg = list_first_entry(&ctx->mt_queue, struct sii8620_mt_msg,
+				       node);
+		list_del(&msg->node);
+		if (msg->recv)
+			msg->recv(ctx, msg);
+		if (msg->continuation)
+			msg->continuation(ctx, msg->ret);
+		kfree(msg);
+	}
+
+	if (ctx->mt_state != MT_STATE_READY || list_empty(&ctx->mt_queue))
+		return;
+
+	ctx->mt_state = MT_STATE_BUSY;
+	msg = list_first_entry(&ctx->mt_queue, struct sii8620_mt_msg, node);
+	if (msg->send)
+		msg->send(ctx, msg);
+}
+
+static void sii8620_enable_gen2_write_burst(struct sii8620 *ctx)
+{
+	u8 ctrl = BIT_MDT_RCV_CTRL_MDT_RCV_EN;
+
+	if (ctx->gen2_write_burst)
+		return;
+
+	if (ctx->mode >= CM_MHL1)
+		ctrl |= BIT_MDT_RCV_CTRL_MDT_DELAY_RCV_EN;
+
+	sii8620_write_seq(ctx,
+		REG_MDT_RCV_TIMEOUT, 100,
+		REG_MDT_RCV_CTRL, ctrl
+	);
+	ctx->gen2_write_burst = 1;
+}
+
+static void sii8620_disable_gen2_write_burst(struct sii8620 *ctx)
+{
+	if (!ctx->gen2_write_burst)
+		return;
+
+	sii8620_write_seq_static(ctx,
+		REG_MDT_XMIT_CTRL, 0,
+		REG_MDT_RCV_CTRL, 0
+	);
+	ctx->gen2_write_burst = 0;
+}
+
+static void sii8620_start_gen2_write_burst(struct sii8620 *ctx)
+{
+	sii8620_write_seq_static(ctx,
+		REG_MDT_INT_1_MASK, BIT_MDT_RCV_TIMEOUT
+			| BIT_MDT_RCV_SM_ABORT_PKT_RCVD | BIT_MDT_RCV_SM_ERROR
+			| BIT_MDT_XMIT_TIMEOUT | BIT_MDT_XMIT_SM_ABORT_PKT_RCVD
+			| BIT_MDT_XMIT_SM_ERROR,
+		REG_MDT_INT_0_MASK, BIT_MDT_XFIFO_EMPTY
+			| BIT_MDT_IDLE_AFTER_HAWB_DISABLE
+			| BIT_MDT_RFIFO_DATA_RDY
+	);
+	sii8620_enable_gen2_write_burst(ctx);
+}
+
+static void sii8620_mt_msc_cmd_send(struct sii8620 *ctx,
+				    struct sii8620_mt_msg *msg)
+{
+	if (msg->reg[0] == MHL_SET_INT &&
+	    msg->reg[1] == MHL_INT_REG(RCHANGE) &&
+	    msg->reg[2] == MHL_INT_RC_FEAT_REQ)
+		sii8620_enable_gen2_write_burst(ctx);
+	else
+		sii8620_disable_gen2_write_burst(ctx);
+
+	switch (msg->reg[0]) {
+	case MHL_WRITE_STAT:
+	case MHL_SET_INT:
+		sii8620_write_buf(ctx, REG_MSC_CMD_OR_OFFSET, msg->reg + 1, 2);
+		sii8620_write(ctx, REG_MSC_COMMAND_START,
+			      BIT_MSC_COMMAND_START_WRITE_STAT);
+		break;
+	case MHL_MSC_MSG:
+		sii8620_write_buf(ctx, REG_MSC_CMD_OR_OFFSET, msg->reg, 3);
+		sii8620_write(ctx, REG_MSC_COMMAND_START,
+			      BIT_MSC_COMMAND_START_MSC_MSG);
+		break;
+	case MHL_READ_DEVCAP_REG:
+	case MHL_READ_XDEVCAP_REG:
+		sii8620_write(ctx, REG_MSC_CMD_OR_OFFSET, msg->reg[1]);
+		sii8620_write(ctx, REG_MSC_COMMAND_START,
+			      BIT_MSC_COMMAND_START_READ_DEVCAP);
+		break;
+	default:
+		dev_err(ctx->dev, "%s: command %#x not supported\n", __func__,
+			msg->reg[0]);
+	}
+}
+
+static struct sii8620_mt_msg *sii8620_mt_msg_new(struct sii8620 *ctx)
+{
+	struct sii8620_mt_msg *msg = kzalloc(sizeof(*msg), GFP_KERNEL);
+
+	if (!msg)
+		ctx->error = -ENOMEM;
+	else
+		list_add_tail(&msg->node, &ctx->mt_queue);
+
+	return msg;
+}
+
+static void sii8620_mt_set_cont(struct sii8620 *ctx, sii8620_cb cont)
+{
+	struct sii8620_mt_msg *msg;
+
+	if (ctx->error)
+		return;
+
+	if (list_empty(&ctx->mt_queue)) {
+		ctx->error = -EINVAL;
+		return;
+	}
+	msg = list_last_entry(&ctx->mt_queue, struct sii8620_mt_msg, node);
+	msg->continuation = cont;
+}
+
+static void sii8620_mt_msc_cmd(struct sii8620 *ctx, u8 cmd, u8 arg1, u8 arg2)
+{
+	struct sii8620_mt_msg *msg = sii8620_mt_msg_new(ctx);
+
+	if (!msg)
+		return;
+
+	msg->reg[0] = cmd;
+	msg->reg[1] = arg1;
+	msg->reg[2] = arg2;
+	msg->send = sii8620_mt_msc_cmd_send;
+}
+
+static void sii8620_mt_write_stat(struct sii8620 *ctx, u8 reg, u8 val)
+{
+	sii8620_mt_msc_cmd(ctx, MHL_WRITE_STAT, reg, val);
+}
+
+static inline void sii8620_mt_set_int(struct sii8620 *ctx, u8 irq, u8 mask)
+{
+	sii8620_mt_msc_cmd(ctx, MHL_SET_INT, irq, mask);
+}
+
+static void sii8620_mt_msc_msg(struct sii8620 *ctx, u8 cmd, u8 data)
+{
+	sii8620_mt_msc_cmd(ctx, MHL_MSC_MSG, cmd, data);
+}
+
+static void sii8620_mt_rap(struct sii8620 *ctx, u8 code)
+{
+	sii8620_mt_msc_msg(ctx, MHL_MSC_MSG_RAP, code);
+}
+
+static void sii8620_mt_rcpk(struct sii8620 *ctx, u8 code)
+{
+	sii8620_mt_msc_msg(ctx, MHL_MSC_MSG_RCPK, code);
+}
+
+static void sii8620_mt_rcpe(struct sii8620 *ctx, u8 code)
+{
+	sii8620_mt_msc_msg(ctx, MHL_MSC_MSG_RCPE, code);
+}
+
+static void sii8620_mt_read_devcap_send(struct sii8620 *ctx,
+					struct sii8620_mt_msg *msg)
+{
+	u8 ctrl = BIT_EDID_CTRL_DEVCAP_SELECT_DEVCAP
+			| BIT_EDID_CTRL_EDID_FIFO_ADDR_AUTO
+			| BIT_EDID_CTRL_EDID_MODE_EN;
+
+	if (msg->reg[0] == MHL_READ_XDEVCAP)
+		ctrl |= BIT_EDID_CTRL_XDEVCAP_EN;
+
+	sii8620_write_seq(ctx,
+		REG_INTR9_MASK, BIT_INTR9_DEVCAP_DONE,
+		REG_EDID_CTRL, ctrl,
+		REG_TPI_CBUS_START, BIT_TPI_CBUS_START_GET_DEVCAP_START
+	);
+}
+
+/* copy src to dst and set changed bits in src */
+static void sii8620_update_array(u8 *dst, u8 *src, int count)
+{
+	while (--count >= 0) {
+		*src ^= *dst;
+		*dst++ ^= *src++;
+	}
+}
+
+static void sii8620_identify_sink(struct sii8620 *ctx)
+{
+	static const char * const sink_str[] = {
+		[SINK_NONE] = "NONE",
+		[SINK_HDMI] = "HDMI",
+		[SINK_DVI] = "DVI"
+	};
+
+	char sink_name[20];
+	struct device *dev = ctx->dev;
+
+	if (!ctx->sink_detected || !ctx->devcap_read)
+		return;
+
+	sii8620_fetch_edid(ctx);
+	if (!ctx->edid) {
+		dev_err(ctx->dev, "Cannot fetch EDID\n");
+		sii8620_mhl_disconnected(ctx);
+		return;
+	}
+	sii8620_set_upstream_edid(ctx);
+
+	if (drm_detect_hdmi_monitor(ctx->edid))
+		ctx->sink_type = SINK_HDMI;
+	else
+		ctx->sink_type = SINK_DVI;
+
+	drm_edid_get_monitor_name(ctx->edid, sink_name, ARRAY_SIZE(sink_name));
+
+	dev_info(dev, "detected sink(type: %s): %s\n",
+		 sink_str[ctx->sink_type], sink_name);
+}
+
+static void sii8620_mr_devcap(struct sii8620 *ctx)
+{
+	u8 dcap[MHL_DCAP_SIZE];
+	struct device *dev = ctx->dev;
+
+	sii8620_read_buf(ctx, REG_EDID_FIFO_RD_DATA, dcap, MHL_DCAP_SIZE);
+	if (ctx->error < 0)
+		return;
+
+	dev_info(dev, "detected dongle MHL %d.%d, ChipID %02x%02x:%02x%02x\n",
+		 dcap[MHL_DCAP_MHL_VERSION] / 16,
+		 dcap[MHL_DCAP_MHL_VERSION] % 16,
+		 dcap[MHL_DCAP_ADOPTER_ID_H], dcap[MHL_DCAP_ADOPTER_ID_L],
+		 dcap[MHL_DCAP_DEVICE_ID_H], dcap[MHL_DCAP_DEVICE_ID_L]);
+	sii8620_update_array(ctx->devcap, dcap, MHL_DCAP_SIZE);
+	ctx->devcap_read = true;
+	sii8620_identify_sink(ctx);
+}
+
+static void sii8620_mr_xdevcap(struct sii8620 *ctx)
+{
+	sii8620_read_buf(ctx, REG_EDID_FIFO_RD_DATA, ctx->xdevcap,
+			 MHL_XDC_SIZE);
+}
+
+static void sii8620_mt_read_devcap_recv(struct sii8620 *ctx,
+					struct sii8620_mt_msg *msg)
+{
+	u8 ctrl = BIT_EDID_CTRL_DEVCAP_SELECT_DEVCAP
+		| BIT_EDID_CTRL_EDID_FIFO_ADDR_AUTO
+		| BIT_EDID_CTRL_EDID_MODE_EN;
+
+	if (msg->reg[0] == MHL_READ_XDEVCAP)
+		ctrl |= BIT_EDID_CTRL_XDEVCAP_EN;
+
+	sii8620_write_seq(ctx,
+		REG_INTR9_MASK, BIT_INTR9_DEVCAP_DONE | BIT_INTR9_EDID_DONE
+			| BIT_INTR9_EDID_ERROR,
+		REG_EDID_CTRL, ctrl,
+		REG_EDID_FIFO_ADDR, 0
+	);
+
+	if (msg->reg[0] == MHL_READ_XDEVCAP)
+		sii8620_mr_xdevcap(ctx);
+	else
+		sii8620_mr_devcap(ctx);
+}
+
+static void sii8620_mt_read_devcap(struct sii8620 *ctx, bool xdevcap)
+{
+	struct sii8620_mt_msg *msg = sii8620_mt_msg_new(ctx);
+
+	if (!msg)
+		return;
+
+	msg->reg[0] = xdevcap ? MHL_READ_XDEVCAP : MHL_READ_DEVCAP;
+	msg->send = sii8620_mt_read_devcap_send;
+	msg->recv = sii8620_mt_read_devcap_recv;
+}
+
+static void sii8620_mt_read_devcap_reg_recv(struct sii8620 *ctx,
+		struct sii8620_mt_msg *msg)
+{
+	u8 reg = msg->reg[1] & 0x7f;
+
+	if (msg->reg[1] & 0x80)
+		ctx->xdevcap[reg] = msg->ret;
+	else
+		ctx->devcap[reg] = msg->ret;
+}
+
+static void sii8620_mt_read_devcap_reg(struct sii8620 *ctx, u8 reg)
+{
+	struct sii8620_mt_msg *msg = sii8620_mt_msg_new(ctx);
+
+	if (!msg)
+		return;
+
+	msg->reg[0] = (reg & 0x80) ? MHL_READ_XDEVCAP_REG : MHL_READ_DEVCAP_REG;
+	msg->reg[1] = reg;
+	msg->send = sii8620_mt_msc_cmd_send;
+	msg->recv = sii8620_mt_read_devcap_reg_recv;
+}
+
+static inline void sii8620_mt_read_xdevcap_reg(struct sii8620 *ctx, u8 reg)
+{
+	sii8620_mt_read_devcap_reg(ctx, reg | 0x80);
+}
+
+static void *sii8620_burst_get_tx_buf(struct sii8620 *ctx, int len)
+{
+	u8 *buf = &ctx->burst.tx_buf[ctx->burst.tx_count];
+	int size = len + 2;
+
+	if (ctx->burst.tx_count + size >= ARRAY_SIZE(ctx->burst.tx_buf)) {
+		dev_err(ctx->dev, "TX-BLK buffer exhausted\n");
+		ctx->error = -EINVAL;
+		return NULL;
+	}
+
+	ctx->burst.tx_count += size;
+	buf[1] = len;
+
+	return buf + 2;
+}
+
+static u8 *sii8620_burst_get_rx_buf(struct sii8620 *ctx, int len)
+{
+	u8 *buf = &ctx->burst.rx_buf[ctx->burst.rx_count];
+	int size = len + 1;
+
+	if (ctx->burst.rx_count + size >= ARRAY_SIZE(ctx->burst.rx_buf)) {
+		dev_err(ctx->dev, "RX-BLK buffer exhausted\n");
+		ctx->error = -EINVAL;
+		return NULL;
+	}
+
+	ctx->burst.rx_count += size;
+	buf[0] = len;
+
+	return buf + 1;
+}
+
+static void sii8620_burst_send(struct sii8620 *ctx)
+{
+	int tx_left = ctx->burst.tx_count;
+	u8 *d = ctx->burst.tx_buf;
+
+	while (tx_left > 0) {
+		int len = d[1] + 2;
+
+		if (ctx->burst.r_count + len > ctx->burst.r_size)
+			break;
+		d[0] = min(ctx->burst.rx_ack, 255);
+		ctx->burst.rx_ack -= d[0];
+		sii8620_write_buf(ctx, REG_EMSC_XMIT_WRITE_PORT, d, len);
+		ctx->burst.r_count += len;
+		tx_left -= len;
+		d += len;
+	}
+
+	ctx->burst.tx_count = tx_left;
+
+	while (ctx->burst.rx_ack > 0) {
+		u8 b[2] = { min(ctx->burst.rx_ack, 255), 0 };
+
+		if (ctx->burst.r_count + 2 > ctx->burst.r_size)
+			break;
+		ctx->burst.rx_ack -= b[0];
+		sii8620_write_buf(ctx, REG_EMSC_XMIT_WRITE_PORT, b, 2);
+		ctx->burst.r_count += 2;
+	}
+}
+
+static void sii8620_burst_receive(struct sii8620 *ctx)
+{
+	u8 buf[3], *d;
+	int count;
+
+	sii8620_read_buf(ctx, REG_EMSCRFIFOBCNTL, buf, 2);
+	count = get_unaligned_le16(buf);
+	while (count > 0) {
+		int len = min(count, 3);
+
+		sii8620_read_buf(ctx, REG_EMSC_RCV_READ_PORT, buf, len);
+		count -= len;
+		ctx->burst.rx_ack += len - 1;
+		ctx->burst.r_count -= buf[1];
+		if (ctx->burst.r_count < 0)
+			ctx->burst.r_count = 0;
+
+		if (len < 3 || !buf[2])
+			continue;
+
+		len = buf[2];
+		d = sii8620_burst_get_rx_buf(ctx, len);
+		if (!d)
+			continue;
+		sii8620_read_buf(ctx, REG_EMSC_RCV_READ_PORT, d, len);
+		count -= len;
+		ctx->burst.rx_ack += len;
+	}
+}
+
+static void sii8620_burst_tx_rbuf_info(struct sii8620 *ctx, int size)
+{
+	struct mhl_burst_blk_rcv_buffer_info *d =
+		sii8620_burst_get_tx_buf(ctx, sizeof(*d));
+	if (!d)
+		return;
+
+	d->id = cpu_to_be16(MHL_BURST_ID_BLK_RCV_BUFFER_INFO);
+	d->size = cpu_to_le16(size);
+}
+
+static u8 sii8620_checksum(void *ptr, int size)
+{
+	u8 *d = ptr, sum = 0;
+
+	while (size--)
+		sum += *d++;
+
+	return sum;
+}
+
+static void sii8620_mhl_burst_hdr_set(struct mhl3_burst_header *h,
+	enum mhl_burst_id id)
+{
+	h->id = cpu_to_be16(id);
+	h->total_entries = 1;
+	h->sequence_index = 1;
+}
+
+static void sii8620_burst_tx_bits_per_pixel_fmt(struct sii8620 *ctx, u8 fmt)
+{
+	struct mhl_burst_bits_per_pixel_fmt *d;
+	const int size = sizeof(*d) + sizeof(d->desc[0]);
+
+	d = sii8620_burst_get_tx_buf(ctx, size);
+	if (!d)
+		return;
+
+	sii8620_mhl_burst_hdr_set(&d->hdr, MHL_BURST_ID_BITS_PER_PIXEL_FMT);
+	d->num_entries = 1;
+	d->desc[0].stream_id = 0;
+	d->desc[0].pixel_format = fmt;
+	d->hdr.checksum -= sii8620_checksum(d, size);
+}
+
+static void sii8620_burst_rx_all(struct sii8620 *ctx)
+{
+	u8 *d = ctx->burst.rx_buf;
+	int count = ctx->burst.rx_count;
+
+	while (count-- > 0) {
+		int len = *d++;
+		int id = get_unaligned_be16(&d[0]);
+
+		switch (id) {
+		case MHL_BURST_ID_BLK_RCV_BUFFER_INFO:
+			ctx->burst.r_size = get_unaligned_le16(&d[2]);
+			break;
+		default:
+			break;
+		}
+		count -= len;
+		d += len;
+	}
+	ctx->burst.rx_count = 0;
+}
+
+static void sii8620_fetch_edid(struct sii8620 *ctx)
+{
+	u8 lm_ddc, ddc_cmd, int3, cbus;
+	unsigned long timeout;
+	int fetched, i;
+	int edid_len = EDID_LENGTH;
+	u8 *edid;
+
+	sii8620_readb(ctx, REG_CBUS_STATUS);
+	lm_ddc = sii8620_readb(ctx, REG_LM_DDC);
+	ddc_cmd = sii8620_readb(ctx, REG_DDC_CMD);
+
+	sii8620_write_seq(ctx,
+		REG_INTR9_MASK, 0,
+		REG_EDID_CTRL, BIT_EDID_CTRL_EDID_FIFO_ADDR_AUTO,
+		REG_HDCP2X_POLL_CS, 0x71,
+		REG_HDCP2X_CTRL_0, BIT_HDCP2X_CTRL_0_HDCP2X_HDCPTX,
+		REG_LM_DDC, lm_ddc | BIT_LM_DDC_SW_TPI_EN_DISABLED,
+	);
+
+	for (i = 0; i < 256; ++i) {
+		u8 ddc_stat = sii8620_readb(ctx, REG_DDC_STATUS);
+
+		if (!(ddc_stat & BIT_DDC_STATUS_DDC_I2C_IN_PROG))
+			break;
+		sii8620_write(ctx, REG_DDC_STATUS,
+			      BIT_DDC_STATUS_DDC_FIFO_EMPTY);
+	}
+
+	sii8620_write(ctx, REG_DDC_ADDR, 0x50 << 1);
+
+	edid = kmalloc(EDID_LENGTH, GFP_KERNEL);
+	if (!edid) {
+		ctx->error = -ENOMEM;
+		return;
+	}
+
+#define FETCH_SIZE 16
+	for (fetched = 0; fetched < edid_len; fetched += FETCH_SIZE) {
+		sii8620_readb(ctx, REG_DDC_STATUS);
+		sii8620_write_seq(ctx,
+			REG_DDC_CMD, ddc_cmd | VAL_DDC_CMD_DDC_CMD_ABORT,
+			REG_DDC_CMD, ddc_cmd | VAL_DDC_CMD_DDC_CMD_CLEAR_FIFO,
+			REG_DDC_STATUS, BIT_DDC_STATUS_DDC_FIFO_EMPTY
+		);
+		sii8620_write_seq(ctx,
+			REG_DDC_SEGM, fetched >> 8,
+			REG_DDC_OFFSET, fetched & 0xff,
+			REG_DDC_DIN_CNT1, FETCH_SIZE,
+			REG_DDC_DIN_CNT2, 0,
+			REG_DDC_CMD, ddc_cmd | VAL_DDC_CMD_ENH_DDC_READ_NO_ACK
+		);
+
+		int3 = 0;
+		timeout = jiffies + msecs_to_jiffies(200);
+		for (;;) {
+			cbus = sii8620_readb(ctx, REG_CBUS_STATUS);
+			if (~cbus & BIT_CBUS_STATUS_CBUS_CONNECTED) {
+				kfree(edid);
+				edid = NULL;
+				goto end;
+			}
+			if (int3 & BIT_DDC_CMD_DONE) {
+				if (sii8620_readb(ctx, REG_DDC_DOUT_CNT)
+				    >= FETCH_SIZE)
+					break;
+			} else {
+				int3 = sii8620_readb(ctx, REG_INTR3);
+			}
+			if (time_is_before_jiffies(timeout)) {
+				ctx->error = -ETIMEDOUT;
+				dev_err(ctx->dev, "timeout during EDID read\n");
+				kfree(edid);
+				edid = NULL;
+				goto end;
+			}
+			usleep_range(10, 20);
+		}
+
+		sii8620_read_buf(ctx, REG_DDC_DATA, edid + fetched, FETCH_SIZE);
+		if (fetched + FETCH_SIZE == EDID_LENGTH) {
+			u8 ext = ((struct edid *)edid)->extensions;
+
+			if (ext) {
+				u8 *new_edid;
+
+				edid_len += ext * EDID_LENGTH;
+				new_edid = krealloc(edid, edid_len, GFP_KERNEL);
+				if (!new_edid) {
+					kfree(edid);
+					ctx->error = -ENOMEM;
+					return;
+				}
+				edid = new_edid;
+			}
+		}
+	}
+
+	sii8620_write_seq(ctx,
+		REG_INTR3_MASK, BIT_DDC_CMD_DONE,
+		REG_LM_DDC, lm_ddc
+	);
+
+end:
+	kfree(ctx->edid);
+	ctx->edid = (struct edid *)edid;
+}
+
+static void sii8620_set_upstream_edid(struct sii8620 *ctx)
+{
+	sii8620_setbits(ctx, REG_DPD, BIT_DPD_PDNRX12 | BIT_DPD_PDIDCK_N
+			| BIT_DPD_PD_MHL_CLK_N, 0xff);
+
+	sii8620_write_seq_static(ctx,
+		REG_RX_HDMI_CTRL3, 0x00,
+		REG_PKT_FILTER_0, 0xFF,
+		REG_PKT_FILTER_1, 0xFF,
+		REG_ALICE0_BW_I2C, 0x06
+	);
+
+	sii8620_setbits(ctx, REG_RX_HDMI_CLR_BUFFER,
+			BIT_RX_HDMI_CLR_BUFFER_VSI_CLR_EN, 0xff);
+
+	sii8620_write_seq_static(ctx,
+		REG_EDID_CTRL, BIT_EDID_CTRL_EDID_FIFO_ADDR_AUTO
+			| BIT_EDID_CTRL_EDID_MODE_EN,
+		REG_EDID_FIFO_ADDR, 0,
+	);
+
+	sii8620_write_buf(ctx, REG_EDID_FIFO_WR_DATA, (u8 *)ctx->edid,
+			  (ctx->edid->extensions + 1) * EDID_LENGTH);
+
+	sii8620_write_seq_static(ctx,
+		REG_EDID_CTRL, BIT_EDID_CTRL_EDID_PRIME_VALID
+			| BIT_EDID_CTRL_EDID_FIFO_ADDR_AUTO
+			| BIT_EDID_CTRL_EDID_MODE_EN,
+		REG_INTR5_MASK, BIT_INTR_SCDT_CHANGE,
+		REG_INTR9_MASK, 0
+	);
+}
+
+static void sii8620_xtal_set_rate(struct sii8620 *ctx)
+{
+	static const struct {
+		unsigned int rate;
+		u8 div;
+		u8 tp1;
+	} rates[] = {
+		{ 19200, 0x04, 0x53 },
+		{ 20000, 0x04, 0x62 },
+		{ 24000, 0x05, 0x75 },
+		{ 30000, 0x06, 0x92 },
+		{ 38400, 0x0c, 0xbc },
+	};
+	unsigned long rate = clk_get_rate(ctx->clk_xtal) / 1000;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(rates) - 1; ++i)
+		if (rate <= rates[i].rate)
+			break;
+
+	if (rate != rates[i].rate)
+		dev_err(ctx->dev, "xtal clock rate(%lukHz) not supported, setting MHL for %ukHz.\n",
+			rate, rates[i].rate);
+
+	sii8620_write(ctx, REG_DIV_CTL_MAIN, rates[i].div);
+	sii8620_write(ctx, REG_HDCP2X_TP1, rates[i].tp1);
+}
+
+static int sii8620_hw_on(struct sii8620 *ctx)
+{
+	int ret;
+
+	ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
+	if (ret)
+		return ret;
+
+	usleep_range(10000, 20000);
+	ret = clk_prepare_enable(ctx->clk_xtal);
+	if (ret)
+		return ret;
+
+	msleep(100);
+	gpiod_set_value(ctx->gpio_reset, 0);
+	msleep(100);
+
+	return 0;
+}
+
+static int sii8620_hw_off(struct sii8620 *ctx)
+{
+	clk_disable_unprepare(ctx->clk_xtal);
+	gpiod_set_value(ctx->gpio_reset, 1);
+	return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
+}
+
+static void sii8620_cbus_reset(struct sii8620 *ctx)
+{
+	sii8620_write(ctx, REG_PWD_SRST, BIT_PWD_SRST_CBUS_RST
+		      | BIT_PWD_SRST_CBUS_RST_SW_EN);
+	usleep_range(10000, 20000);
+	sii8620_write(ctx, REG_PWD_SRST, BIT_PWD_SRST_CBUS_RST_SW_EN);
+}
+
+static void sii8620_set_auto_zone(struct sii8620 *ctx)
+{
+	if (ctx->mode != CM_MHL1) {
+		sii8620_write_seq_static(ctx,
+			REG_TX_ZONE_CTL1, 0x0,
+			REG_MHL_PLL_CTL0, VAL_MHL_PLL_CTL0_HDMI_CLK_RATIO_1X
+				| BIT_MHL_PLL_CTL0_CRYSTAL_CLK_SEL
+				| BIT_MHL_PLL_CTL0_ZONE_MASK_OE
+		);
+	} else {
+		sii8620_write_seq_static(ctx,
+			REG_TX_ZONE_CTL1, VAL_TX_ZONE_CTL1_TX_ZONE_CTRL_MODE,
+			REG_MHL_PLL_CTL0, VAL_MHL_PLL_CTL0_HDMI_CLK_RATIO_1X
+				| BIT_MHL_PLL_CTL0_ZONE_MASK_OE
+		);
+	}
+}
+
+static void sii8620_stop_video(struct sii8620 *ctx)
+{
+	u8 val;
+
+	sii8620_write_seq_static(ctx,
+		REG_TPI_INTR_EN, 0,
+		REG_HDCP2X_INTR0_MASK, 0,
+		REG_TPI_COPP_DATA2, 0,
+		REG_TPI_INTR_ST0, ~0,
+	);
+
+	switch (ctx->sink_type) {
+	case SINK_DVI:
+		val = BIT_TPI_SC_REG_TMDS_OE_POWER_DOWN
+			| BIT_TPI_SC_TPI_AV_MUTE;
+		break;
+	case SINK_HDMI:
+	default:
+		val = BIT_TPI_SC_REG_TMDS_OE_POWER_DOWN
+			| BIT_TPI_SC_TPI_AV_MUTE
+			| BIT_TPI_SC_TPI_OUTPUT_MODE_0_HDMI;
+		break;
+	}
+
+	sii8620_write(ctx, REG_TPI_SC, val);
+}
+
+static void sii8620_set_format(struct sii8620 *ctx)
+{
+	u8 out_fmt;
+
+	if (sii8620_is_mhl3(ctx)) {
+		sii8620_setbits(ctx, REG_M3_P0CTRL,
+				BIT_M3_P0CTRL_MHL3_P0_PIXEL_MODE_PACKED,
+				ctx->use_packed_pixel ? ~0 : 0);
+	} else {
+		if (ctx->use_packed_pixel) {
+			sii8620_write_seq_static(ctx,
+				REG_VID_MODE, BIT_VID_MODE_M1080P,
+				REG_MHL_TOP_CTL, BIT_MHL_TOP_CTL_MHL_PP_SEL | 1,
+				REG_MHLTX_CTL6, 0x60
+			);
+		} else {
+			sii8620_write_seq_static(ctx,
+				REG_VID_MODE, 0,
+				REG_MHL_TOP_CTL, 1,
+				REG_MHLTX_CTL6, 0xa0
+			);
+		}
+	}
+
+	if (ctx->use_packed_pixel)
+		out_fmt = VAL_TPI_FORMAT(YCBCR422, FULL);
+	else
+		out_fmt = VAL_TPI_FORMAT(RGB, FULL);
+
+	sii8620_write_seq(ctx,
+		REG_TPI_INPUT, VAL_TPI_FORMAT(RGB, FULL),
+		REG_TPI_OUTPUT, out_fmt,
+	);
+}
+
+static int mhl3_infoframe_init(struct mhl3_infoframe *frame)
+{
+	memset(frame, 0, sizeof(*frame));
+
+	frame->version = 3;
+	frame->hev_format = -1;
+	return 0;
+}
+
+static ssize_t mhl3_infoframe_pack(struct mhl3_infoframe *frame,
+		 void *buffer, size_t size)
+{
+	const int frm_len = HDMI_INFOFRAME_HEADER_SIZE + MHL3_INFOFRAME_SIZE;
+	u8 *ptr = buffer;
+
+	if (size < frm_len)
+		return -ENOSPC;
+
+	memset(buffer, 0, size);
+	ptr[0] = HDMI_INFOFRAME_TYPE_VENDOR;
+	ptr[1] = frame->version;
+	ptr[2] = MHL3_INFOFRAME_SIZE;
+	ptr[4] = MHL3_IEEE_OUI & 0xff;
+	ptr[5] = (MHL3_IEEE_OUI >> 8) & 0xff;
+	ptr[6] = (MHL3_IEEE_OUI >> 16) & 0xff;
+	ptr[7] = frame->video_format & 0x3;
+	ptr[7] |= (frame->format_type & 0x7) << 2;
+	ptr[7] |= frame->sep_audio ? BIT(5) : 0;
+	if (frame->hev_format >= 0) {
+		ptr[9] = 1;
+		ptr[10] = (frame->hev_format >> 8) & 0xff;
+		ptr[11] = frame->hev_format & 0xff;
+	}
+	if (frame->av_delay) {
+		bool sign = frame->av_delay < 0;
+		int delay = sign ? -frame->av_delay : frame->av_delay;
+
+		ptr[12] = (delay >> 16) & 0xf;
+		if (sign)
+			ptr[12] |= BIT(4);
+		ptr[13] = (delay >> 8) & 0xff;
+		ptr[14] = delay & 0xff;
+	}
+	ptr[3] -= sii8620_checksum(buffer, frm_len);
+	return frm_len;
+}
+
+static void sii8620_set_infoframes(struct sii8620 *ctx,
+				   struct drm_display_mode *mode)
+{
+	struct mhl3_infoframe mhl_frm;
+	union hdmi_infoframe frm;
+	u8 buf[31];
+	int ret;
+
+	ret = drm_hdmi_avi_infoframe_from_display_mode(&frm.avi,
+						       NULL, mode);
+	if (ctx->use_packed_pixel)
+		frm.avi.colorspace = HDMI_COLORSPACE_YUV422;
+
+	if (!ret)
+		ret = hdmi_avi_infoframe_pack(&frm.avi, buf, ARRAY_SIZE(buf));
+	if (ret > 0)
+		sii8620_write_buf(ctx, REG_TPI_AVI_CHSUM, buf + 3, ret - 3);
+
+	if (!sii8620_is_mhl3(ctx) || !ctx->use_packed_pixel) {
+		sii8620_write(ctx, REG_TPI_SC,
+			BIT_TPI_SC_TPI_OUTPUT_MODE_0_HDMI);
+		sii8620_write(ctx, REG_PKT_FILTER_0,
+			BIT_PKT_FILTER_0_DROP_CEA_GAMUT_PKT |
+			BIT_PKT_FILTER_0_DROP_MPEG_PKT |
+			BIT_PKT_FILTER_0_DROP_GCP_PKT,
+			BIT_PKT_FILTER_1_DROP_GEN_PKT);
+		return;
+	}
+
+	sii8620_write(ctx, REG_PKT_FILTER_0,
+		BIT_PKT_FILTER_0_DROP_CEA_GAMUT_PKT |
+		BIT_PKT_FILTER_0_DROP_MPEG_PKT |
+		BIT_PKT_FILTER_0_DROP_AVI_PKT |
+		BIT_PKT_FILTER_0_DROP_GCP_PKT,
+		BIT_PKT_FILTER_1_VSI_OVERRIDE_DIS |
+		BIT_PKT_FILTER_1_DROP_GEN_PKT |
+		BIT_PKT_FILTER_1_DROP_VSIF_PKT);
+
+	sii8620_write(ctx, REG_TPI_INFO_FSEL, BIT_TPI_INFO_FSEL_EN
+		| BIT_TPI_INFO_FSEL_RPT | VAL_TPI_INFO_FSEL_VSI);
+	ret = mhl3_infoframe_init(&mhl_frm);
+	if (!ret)
+		ret = mhl3_infoframe_pack(&mhl_frm, buf, ARRAY_SIZE(buf));
+	sii8620_write_buf(ctx, REG_TPI_INFO_B0, buf, ret);
+}
+
+static void sii8620_start_video(struct sii8620 *ctx)
+{
+	struct drm_display_mode *mode =
+		&ctx->bridge.encoder->crtc->state->adjusted_mode;
+
+	if (!sii8620_is_mhl3(ctx))
+		sii8620_stop_video(ctx);
+
+	if (ctx->sink_type == SINK_DVI && !sii8620_is_mhl3(ctx)) {
+		sii8620_write(ctx, REG_RX_HDMI_CTRL2,
+			      VAL_RX_HDMI_CTRL2_DEFVAL);
+		sii8620_write(ctx, REG_TPI_SC, 0);
+		return;
+	}
+
+	sii8620_write_seq_static(ctx,
+		REG_RX_HDMI_CTRL2, VAL_RX_HDMI_CTRL2_DEFVAL
+			| BIT_RX_HDMI_CTRL2_USE_AV_MUTE,
+		REG_VID_OVRRD, BIT_VID_OVRRD_PP_AUTO_DISABLE
+			| BIT_VID_OVRRD_M1080P_OVRRD);
+	sii8620_set_format(ctx);
+
+	if (!sii8620_is_mhl3(ctx)) {
+		u8 link_mode = MHL_DST_LM_PATH_ENABLED;
+
+		if (ctx->use_packed_pixel)
+			link_mode |= MHL_DST_LM_CLK_MODE_PACKED_PIXEL;
+		else
+			link_mode |= MHL_DST_LM_CLK_MODE_NORMAL;
+
+		sii8620_mt_write_stat(ctx, MHL_DST_REG(LINK_MODE), link_mode);
+		sii8620_set_auto_zone(ctx);
+	} else {
+		static const struct {
+			int max_clk;
+			u8 zone;
+			u8 link_rate;
+			u8 rrp_decode;
+		} clk_spec[] = {
+			{ 150000, VAL_TX_ZONE_CTL3_TX_ZONE_1_5GBPS,
+			  MHL_XDS_LINK_RATE_1_5_GBPS, 0x38 },
+			{ 300000, VAL_TX_ZONE_CTL3_TX_ZONE_3GBPS,
+			  MHL_XDS_LINK_RATE_3_0_GBPS, 0x40 },
+			{ 600000, VAL_TX_ZONE_CTL3_TX_ZONE_6GBPS,
+			  MHL_XDS_LINK_RATE_6_0_GBPS, 0x40 },
+		};
+		u8 p0_ctrl = BIT_M3_P0CTRL_MHL3_P0_PORT_EN;
+		int clk = mode->clock * (ctx->use_packed_pixel ? 2 : 3);
+		int i;
+
+		for (i = 0; i < ARRAY_SIZE(clk_spec) - 1; ++i)
+			if (clk < clk_spec[i].max_clk)
+				break;
+
+		if (100 * clk >= 98 * clk_spec[i].max_clk)
+			p0_ctrl |= BIT_M3_P0CTRL_MHL3_P0_UNLIMIT_EN;
+
+		sii8620_burst_tx_bits_per_pixel_fmt(ctx, ctx->use_packed_pixel);
+		sii8620_burst_send(ctx);
+		sii8620_write_seq(ctx,
+			REG_MHL_DP_CTL0, 0xf0,
+			REG_MHL3_TX_ZONE_CTL, clk_spec[i].zone);
+		sii8620_setbits(ctx, REG_M3_P0CTRL,
+			BIT_M3_P0CTRL_MHL3_P0_PORT_EN
+			| BIT_M3_P0CTRL_MHL3_P0_UNLIMIT_EN, p0_ctrl);
+		sii8620_setbits(ctx, REG_M3_POSTM, MSK_M3_POSTM_RRP_DECODE,
+			clk_spec[i].rrp_decode);
+		sii8620_write_seq_static(ctx,
+			REG_M3_CTRL, VAL_M3_CTRL_MHL3_VALUE
+				| BIT_M3_CTRL_H2M_SWRST,
+			REG_M3_CTRL, VAL_M3_CTRL_MHL3_VALUE
+		);
+		sii8620_mt_write_stat(ctx, MHL_XDS_REG(AVLINK_MODE_CONTROL),
+			clk_spec[i].link_rate);
+	}
+
+	sii8620_set_infoframes(ctx, mode);
+}
+
+static void sii8620_disable_hpd(struct sii8620 *ctx)
+{
+	sii8620_setbits(ctx, REG_EDID_CTRL, BIT_EDID_CTRL_EDID_PRIME_VALID, 0);
+	sii8620_write_seq_static(ctx,
+		REG_HPD_CTRL, BIT_HPD_CTRL_HPD_OUT_OVR_EN,
+		REG_INTR8_MASK, 0
+	);
+}
+
+static void sii8620_enable_hpd(struct sii8620 *ctx)
+{
+	sii8620_setbits(ctx, REG_TMDS_CSTAT_P3,
+			BIT_TMDS_CSTAT_P3_SCDT_CLR_AVI_DIS
+			| BIT_TMDS_CSTAT_P3_CLR_AVI, ~0);
+	sii8620_write_seq_static(ctx,
+		REG_HPD_CTRL, BIT_HPD_CTRL_HPD_OUT_OVR_EN
+			| BIT_HPD_CTRL_HPD_HIGH,
+	);
+}
+
+static void sii8620_mhl_discover(struct sii8620 *ctx)
+{
+	sii8620_write_seq_static(ctx,
+		REG_DISC_CTRL9, BIT_DISC_CTRL9_WAKE_DRVFLT
+			| BIT_DISC_CTRL9_DISC_PULSE_PROCEED,
+		REG_DISC_CTRL4, VAL_DISC_CTRL4(VAL_PUP_5K, VAL_PUP_20K),
+		REG_CBUS_DISC_INTR0_MASK, BIT_MHL3_EST_INT
+			| BIT_MHL_EST_INT
+			| BIT_NOT_MHL_EST_INT
+			| BIT_CBUS_MHL3_DISCON_INT
+			| BIT_CBUS_MHL12_DISCON_INT
+			| BIT_RGND_READY_INT,
+		REG_MHL_PLL_CTL0, VAL_MHL_PLL_CTL0_HDMI_CLK_RATIO_1X
+			| BIT_MHL_PLL_CTL0_CRYSTAL_CLK_SEL
+			| BIT_MHL_PLL_CTL0_ZONE_MASK_OE,
+		REG_MHL_DP_CTL0, BIT_MHL_DP_CTL0_DP_OE
+			| BIT_MHL_DP_CTL0_TX_OE_OVR,
+		REG_M3_CTRL, VAL_M3_CTRL_MHL3_VALUE,
+		REG_MHL_DP_CTL1, 0xA2,
+		REG_MHL_DP_CTL2, 0x03,
+		REG_MHL_DP_CTL3, 0x35,
+		REG_MHL_DP_CTL5, 0x02,
+		REG_MHL_DP_CTL6, 0x02,
+		REG_MHL_DP_CTL7, 0x03,
+		REG_COC_CTLC, 0xFF,
+		REG_DPD, BIT_DPD_PWRON_PLL | BIT_DPD_PDNTX12
+			| BIT_DPD_OSC_EN | BIT_DPD_PWRON_HSIC,
+		REG_COC_INTR_MASK, BIT_COC_PLL_LOCK_STATUS_CHANGE
+			| BIT_COC_CALIBRATION_DONE,
+		REG_CBUS_INT_1_MASK, BIT_CBUS_MSC_ABORT_RCVD
+			| BIT_CBUS_CMD_ABORT,
+		REG_CBUS_INT_0_MASK, BIT_CBUS_MSC_MT_DONE
+			| BIT_CBUS_HPD_CHG
+			| BIT_CBUS_MSC_MR_WRITE_STAT
+			| BIT_CBUS_MSC_MR_MSC_MSG
+			| BIT_CBUS_MSC_MR_WRITE_BURST
+			| BIT_CBUS_MSC_MR_SET_INT
+			| BIT_CBUS_MSC_MT_DONE_NACK
+	);
+}
+
+static void sii8620_peer_specific_init(struct sii8620 *ctx)
+{
+	if (sii8620_is_mhl3(ctx))
+		sii8620_write_seq_static(ctx,
+			REG_SYS_CTRL1, BIT_SYS_CTRL1_BLOCK_DDC_BY_HPD,
+			REG_EMSCINTRMASK1,
+				BIT_EMSCINTR1_EMSC_TRAINING_COMMA_ERR
+		);
+	else
+		sii8620_write_seq_static(ctx,
+			REG_HDCP2X_INTR0_MASK, 0x00,
+			REG_EMSCINTRMASK1, 0x00,
+			REG_HDCP2X_INTR0, 0xFF,
+			REG_INTR1, 0xFF,
+			REG_SYS_CTRL1, BIT_SYS_CTRL1_BLOCK_DDC_BY_HPD
+				| BIT_SYS_CTRL1_TX_CTRL_HDMI
+		);
+}
+
+#define SII8620_MHL_VERSION			0x32
+#define SII8620_SCRATCHPAD_SIZE			16
+#define SII8620_INT_STAT_SIZE			0x33
+
+static void sii8620_set_dev_cap(struct sii8620 *ctx)
+{
+	static const u8 devcap[MHL_DCAP_SIZE] = {
+		[MHL_DCAP_MHL_VERSION] = SII8620_MHL_VERSION,
+		[MHL_DCAP_CAT] = MHL_DCAP_CAT_SOURCE | MHL_DCAP_CAT_POWER,
+		[MHL_DCAP_ADOPTER_ID_H] = 0x01,
+		[MHL_DCAP_ADOPTER_ID_L] = 0x41,
+		[MHL_DCAP_VID_LINK_MODE] = MHL_DCAP_VID_LINK_RGB444
+			| MHL_DCAP_VID_LINK_PPIXEL
+			| MHL_DCAP_VID_LINK_16BPP,
+		[MHL_DCAP_AUD_LINK_MODE] = MHL_DCAP_AUD_LINK_2CH,
+		[MHL_DCAP_VIDEO_TYPE] = MHL_DCAP_VT_GRAPHICS,
+		[MHL_DCAP_LOG_DEV_MAP] = MHL_DCAP_LD_GUI,
+		[MHL_DCAP_BANDWIDTH] = 0x0f,
+		[MHL_DCAP_FEATURE_FLAG] = MHL_DCAP_FEATURE_RCP_SUPPORT
+			| MHL_DCAP_FEATURE_RAP_SUPPORT
+			| MHL_DCAP_FEATURE_SP_SUPPORT,
+		[MHL_DCAP_SCRATCHPAD_SIZE] = SII8620_SCRATCHPAD_SIZE,
+		[MHL_DCAP_INT_STAT_SIZE] = SII8620_INT_STAT_SIZE,
+	};
+	static const u8 xdcap[MHL_XDC_SIZE] = {
+		[MHL_XDC_ECBUS_SPEEDS] = MHL_XDC_ECBUS_S_075
+			| MHL_XDC_ECBUS_S_8BIT,
+		[MHL_XDC_TMDS_SPEEDS] = MHL_XDC_TMDS_150
+			| MHL_XDC_TMDS_300 | MHL_XDC_TMDS_600,
+		[MHL_XDC_ECBUS_ROLES] = MHL_XDC_DEV_HOST,
+		[MHL_XDC_LOG_DEV_MAPX] = MHL_XDC_LD_PHONE,
+	};
+
+	sii8620_write_buf(ctx, REG_MHL_DEVCAP_0, devcap, ARRAY_SIZE(devcap));
+	sii8620_write_buf(ctx, REG_MHL_EXTDEVCAP_0, xdcap, ARRAY_SIZE(xdcap));
+}
+
+static void sii8620_mhl_init(struct sii8620 *ctx)
+{
+	sii8620_write_seq_static(ctx,
+		REG_DISC_CTRL4, VAL_DISC_CTRL4(VAL_PUP_OFF, VAL_PUP_20K),
+		REG_CBUS_MSC_COMPAT_CTRL,
+			BIT_CBUS_MSC_COMPAT_CTRL_XDEVCAP_EN,
+	);
+
+	sii8620_peer_specific_init(ctx);
+
+	sii8620_disable_hpd(ctx);
+
+	sii8620_write_seq_static(ctx,
+		REG_EDID_CTRL, BIT_EDID_CTRL_EDID_FIFO_ADDR_AUTO,
+		REG_DISC_CTRL9, BIT_DISC_CTRL9_WAKE_DRVFLT
+			| BIT_DISC_CTRL9_WAKE_PULSE_BYPASS,
+		REG_TMDS0_CCTRL1, 0x90,
+		REG_TMDS_CLK_EN, 0x01,
+		REG_TMDS_CH_EN, 0x11,
+		REG_BGR_BIAS, 0x87,
+		REG_ALICE0_ZONE_CTRL, 0xE8,
+		REG_ALICE0_MODE_CTRL, 0x04,
+	);
+	sii8620_setbits(ctx, REG_LM_DDC, BIT_LM_DDC_SW_TPI_EN_DISABLED, 0);
+	sii8620_write_seq_static(ctx,
+		REG_TPI_HW_OPT3, 0x76,
+		REG_TMDS_CCTRL, BIT_TMDS_CCTRL_TMDS_OE,
+		REG_TPI_DTD_B2, 79,
+	);
+	sii8620_set_dev_cap(ctx);
+	sii8620_write_seq_static(ctx,
+		REG_MDT_XMIT_TIMEOUT, 100,
+		REG_MDT_XMIT_CTRL, 0x03,
+		REG_MDT_XFIFO_STAT, 0x00,
+		REG_MDT_RCV_TIMEOUT, 100,
+		REG_CBUS_LINK_CTRL_8, 0x1D,
+	);
+
+	sii8620_start_gen2_write_burst(ctx);
+	sii8620_write_seq_static(ctx,
+		REG_BIST_CTRL, 0x00,
+		REG_COC_CTL1, 0x10,
+		REG_COC_CTL2, 0x18,
+		REG_COC_CTLF, 0x07,
+		REG_COC_CTL11, 0xF8,
+		REG_COC_CTL17, 0x61,
+		REG_COC_CTL18, 0x46,
+		REG_COC_CTL19, 0x15,
+		REG_COC_CTL1A, 0x01,
+		REG_MHL_COC_CTL3, BIT_MHL_COC_CTL3_COC_AECHO_EN,
+		REG_MHL_COC_CTL4, 0x2D,
+		REG_MHL_COC_CTL5, 0xF9,
+		REG_MSC_HEARTBEAT_CTRL, 0x27,
+	);
+	sii8620_disable_gen2_write_burst(ctx);
+
+	sii8620_mt_write_stat(ctx, MHL_DST_REG(VERSION), SII8620_MHL_VERSION);
+	sii8620_mt_write_stat(ctx, MHL_DST_REG(CONNECTED_RDY),
+			      MHL_DST_CONN_DCAP_RDY | MHL_DST_CONN_XDEVCAPP_SUPP
+			      | MHL_DST_CONN_POW_STAT);
+	sii8620_mt_set_int(ctx, MHL_INT_REG(RCHANGE), MHL_INT_RC_DCAP_CHG);
+}
+
+static void sii8620_emsc_enable(struct sii8620 *ctx)
+{
+	u8 reg;
+
+	sii8620_setbits(ctx, REG_GENCTL, BIT_GENCTL_EMSC_EN
+					 | BIT_GENCTL_CLR_EMSC_RFIFO
+					 | BIT_GENCTL_CLR_EMSC_XFIFO, ~0);
+	sii8620_setbits(ctx, REG_GENCTL, BIT_GENCTL_CLR_EMSC_RFIFO
+					 | BIT_GENCTL_CLR_EMSC_XFIFO, 0);
+	sii8620_setbits(ctx, REG_COMMECNT, BIT_COMMECNT_I2C_TO_EMSC_EN, ~0);
+	reg = sii8620_readb(ctx, REG_EMSCINTR);
+	sii8620_write(ctx, REG_EMSCINTR, reg);
+	sii8620_write(ctx, REG_EMSCINTRMASK, BIT_EMSCINTR_SPI_DVLD);
+}
+
+static int sii8620_wait_for_fsm_state(struct sii8620 *ctx, u8 state)
+{
+	int i;
+
+	for (i = 0; i < 10; ++i) {
+		u8 s = sii8620_readb(ctx, REG_COC_STAT_0);
+
+		if ((s & MSK_COC_STAT_0_FSM_STATE) == state)
+			return 0;
+		if (!(s & BIT_COC_STAT_0_PLL_LOCKED))
+			return -EBUSY;
+		usleep_range(4000, 6000);
+	}
+	return -ETIMEDOUT;
+}
+
+static void sii8620_set_mode(struct sii8620 *ctx, enum sii8620_mode mode)
+{
+	int ret;
+
+	if (ctx->mode == mode)
+		return;
+
+	switch (mode) {
+	case CM_MHL1:
+		sii8620_write_seq_static(ctx,
+			REG_CBUS_MSC_COMPAT_CTRL, 0x02,
+			REG_M3_CTRL, VAL_M3_CTRL_MHL1_2_VALUE,
+			REG_DPD, BIT_DPD_PWRON_PLL | BIT_DPD_PDNTX12
+				| BIT_DPD_OSC_EN,
+			REG_COC_INTR_MASK, 0
+		);
+		ctx->mode = mode;
+		break;
+	case CM_MHL3:
+		sii8620_write(ctx, REG_M3_CTRL, VAL_M3_CTRL_MHL3_VALUE);
+		ctx->mode = mode;
+		return;
+	case CM_ECBUS_S:
+		sii8620_emsc_enable(ctx);
+		sii8620_write_seq_static(ctx,
+			REG_TTXSPINUMS, 4,
+			REG_TRXSPINUMS, 4,
+			REG_TTXHSICNUMS, 0x14,
+			REG_TRXHSICNUMS, 0x14,
+			REG_TTXTOTNUMS, 0x18,
+			REG_TRXTOTNUMS, 0x18,
+			REG_PWD_SRST, BIT_PWD_SRST_COC_DOC_RST
+				      | BIT_PWD_SRST_CBUS_RST_SW_EN,
+			REG_MHL_COC_CTL1, 0xbd,
+			REG_PWD_SRST, BIT_PWD_SRST_CBUS_RST_SW_EN,
+			REG_COC_CTLB, 0x01,
+			REG_COC_CTL0, 0x5c,
+			REG_COC_CTL14, 0x03,
+			REG_COC_CTL15, 0x80,
+			REG_MHL_DP_CTL6, BIT_MHL_DP_CTL6_DP_TAP1_SGN
+					 | BIT_MHL_DP_CTL6_DP_TAP1_EN
+					 | BIT_MHL_DP_CTL6_DT_PREDRV_FEEDCAP_EN,
+			REG_MHL_DP_CTL8, 0x03
+		);
+		ret = sii8620_wait_for_fsm_state(ctx, 0x03);
+		sii8620_write_seq_static(ctx,
+			REG_COC_CTL14, 0x00,
+			REG_COC_CTL15, 0x80
+		);
+		if (!ret)
+			sii8620_write(ctx, REG_CBUS3_CNVT, 0x85);
+		else
+			sii8620_disconnect(ctx);
+		return;
+	case CM_DISCONNECTED:
+		ctx->mode = mode;
+		break;
+	default:
+		dev_err(ctx->dev, "%s mode %d not supported\n", __func__, mode);
+		break;
+	}
+
+	sii8620_set_auto_zone(ctx);
+
+	if (mode != CM_MHL1)
+		return;
+
+	sii8620_write_seq_static(ctx,
+		REG_MHL_DP_CTL0, 0xBC,
+		REG_MHL_DP_CTL1, 0xBB,
+		REG_MHL_DP_CTL3, 0x48,
+		REG_MHL_DP_CTL5, 0x39,
+		REG_MHL_DP_CTL2, 0x2A,
+		REG_MHL_DP_CTL6, 0x2A,
+		REG_MHL_DP_CTL7, 0x08
+	);
+}
+
+static void sii8620_hpd_unplugged(struct sii8620 *ctx)
+{
+	sii8620_disable_hpd(ctx);
+	ctx->sink_type = SINK_NONE;
+	ctx->sink_detected = false;
+	ctx->feature_complete = false;
+	kfree(ctx->edid);
+	ctx->edid = NULL;
+}
+
+static void sii8620_disconnect(struct sii8620 *ctx)
+{
+	sii8620_disable_gen2_write_burst(ctx);
+	sii8620_stop_video(ctx);
+	msleep(100);
+	sii8620_cbus_reset(ctx);
+	sii8620_set_mode(ctx, CM_DISCONNECTED);
+	sii8620_write_seq_static(ctx,
+		REG_TX_ZONE_CTL1, 0,
+		REG_MHL_PLL_CTL0, 0x07,
+		REG_COC_CTL0, 0x40,
+		REG_CBUS3_CNVT, 0x84,
+		REG_COC_CTL14, 0x00,
+		REG_COC_CTL0, 0x40,
+		REG_HRXCTRL3, 0x07,
+		REG_MHL_PLL_CTL0, VAL_MHL_PLL_CTL0_HDMI_CLK_RATIO_1X
+			| BIT_MHL_PLL_CTL0_CRYSTAL_CLK_SEL
+			| BIT_MHL_PLL_CTL0_ZONE_MASK_OE,
+		REG_MHL_DP_CTL0, BIT_MHL_DP_CTL0_DP_OE
+			| BIT_MHL_DP_CTL0_TX_OE_OVR,
+		REG_MHL_DP_CTL1, 0xBB,
+		REG_MHL_DP_CTL3, 0x48,
+		REG_MHL_DP_CTL5, 0x3F,
+		REG_MHL_DP_CTL2, 0x2F,
+		REG_MHL_DP_CTL6, 0x2A,
+		REG_MHL_DP_CTL7, 0x03
+	);
+	sii8620_hpd_unplugged(ctx);
+	sii8620_write_seq_static(ctx,
+		REG_M3_CTRL, VAL_M3_CTRL_MHL3_VALUE,
+		REG_MHL_COC_CTL1, 0x07,
+		REG_DISC_CTRL4, VAL_DISC_CTRL4(VAL_PUP_OFF, VAL_PUP_20K),
+		REG_DISC_CTRL8, 0x00,
+		REG_DISC_CTRL9, BIT_DISC_CTRL9_WAKE_DRVFLT
+			| BIT_DISC_CTRL9_WAKE_PULSE_BYPASS,
+		REG_INT_CTRL, 0x00,
+		REG_MSC_HEARTBEAT_CTRL, 0x27,
+		REG_DISC_CTRL1, 0x25,
+		REG_CBUS_DISC_INTR0, (u8)~BIT_RGND_READY_INT,
+		REG_CBUS_DISC_INTR0_MASK, BIT_RGND_READY_INT,
+		REG_MDT_INT_1, 0xff,
+		REG_MDT_INT_1_MASK, 0x00,
+		REG_MDT_INT_0, 0xff,
+		REG_MDT_INT_0_MASK, 0x00,
+		REG_COC_INTR, 0xff,
+		REG_COC_INTR_MASK, 0x00,
+		REG_TRXINTH, 0xff,
+		REG_TRXINTMH, 0x00,
+		REG_CBUS_INT_0, 0xff,
+		REG_CBUS_INT_0_MASK, 0x00,
+		REG_CBUS_INT_1, 0xff,
+		REG_CBUS_INT_1_MASK, 0x00,
+		REG_EMSCINTR, 0xff,
+		REG_EMSCINTRMASK, 0x00,
+		REG_EMSCINTR1, 0xff,
+		REG_EMSCINTRMASK1, 0x00,
+		REG_INTR8, 0xff,
+		REG_INTR8_MASK, 0x00,
+		REG_TPI_INTR_ST0, 0xff,
+		REG_TPI_INTR_EN, 0x00,
+		REG_HDCP2X_INTR0, 0xff,
+		REG_HDCP2X_INTR0_MASK, 0x00,
+		REG_INTR9, 0xff,
+		REG_INTR9_MASK, 0x00,
+		REG_INTR3, 0xff,
+		REG_INTR3_MASK, 0x00,
+		REG_INTR5, 0xff,
+		REG_INTR5_MASK, 0x00,
+		REG_INTR2, 0xff,
+		REG_INTR2_MASK, 0x00,
+	);
+	memset(ctx->stat, 0, sizeof(ctx->stat));
+	memset(ctx->xstat, 0, sizeof(ctx->xstat));
+	memset(ctx->devcap, 0, sizeof(ctx->devcap));
+	memset(ctx->xdevcap, 0, sizeof(ctx->xdevcap));
+	ctx->devcap_read = false;
+	ctx->cbus_status = 0;
+	sii8620_mt_cleanup(ctx);
+}
+
+static void sii8620_mhl_disconnected(struct sii8620 *ctx)
+{
+	sii8620_write_seq_static(ctx,
+		REG_DISC_CTRL4, VAL_DISC_CTRL4(VAL_PUP_OFF, VAL_PUP_20K),
+		REG_CBUS_MSC_COMPAT_CTRL,
+			BIT_CBUS_MSC_COMPAT_CTRL_XDEVCAP_EN
+	);
+	sii8620_disconnect(ctx);
+}
+
+static void sii8620_irq_disc(struct sii8620 *ctx)
+{
+	u8 stat = sii8620_readb(ctx, REG_CBUS_DISC_INTR0);
+
+	if (stat & VAL_CBUS_MHL_DISCON)
+		sii8620_mhl_disconnected(ctx);
+
+	if (stat & BIT_RGND_READY_INT) {
+		u8 stat2 = sii8620_readb(ctx, REG_DISC_STAT2);
+
+		if ((stat2 & MSK_DISC_STAT2_RGND) == VAL_RGND_1K) {
+			sii8620_mhl_discover(ctx);
+		} else {
+			sii8620_write_seq_static(ctx,
+				REG_DISC_CTRL9, BIT_DISC_CTRL9_WAKE_DRVFLT
+					| BIT_DISC_CTRL9_NOMHL_EST
+					| BIT_DISC_CTRL9_WAKE_PULSE_BYPASS,
+				REG_CBUS_DISC_INTR0_MASK, BIT_RGND_READY_INT
+					| BIT_CBUS_MHL3_DISCON_INT
+					| BIT_CBUS_MHL12_DISCON_INT
+					| BIT_NOT_MHL_EST_INT
+			);
+		}
+	}
+	if (stat & BIT_MHL_EST_INT)
+		sii8620_mhl_init(ctx);
+
+	sii8620_write(ctx, REG_CBUS_DISC_INTR0, stat);
+}
+
+static void sii8620_read_burst(struct sii8620 *ctx)
+{
+	u8 buf[17];
+
+	sii8620_read_buf(ctx, REG_MDT_RCV_READ_PORT, buf, ARRAY_SIZE(buf));
+	sii8620_write(ctx, REG_MDT_RCV_CTRL, BIT_MDT_RCV_CTRL_MDT_RCV_EN |
+		      BIT_MDT_RCV_CTRL_MDT_DELAY_RCV_EN |
+		      BIT_MDT_RCV_CTRL_MDT_RFIFO_CLR_CUR);
+	sii8620_readb(ctx, REG_MDT_RFIFO_STAT);
+}
+
+static void sii8620_irq_g2wb(struct sii8620 *ctx)
+{
+	u8 stat = sii8620_readb(ctx, REG_MDT_INT_0);
+
+	if (stat & BIT_MDT_IDLE_AFTER_HAWB_DISABLE)
+		if (sii8620_is_mhl3(ctx))
+			sii8620_mt_set_int(ctx, MHL_INT_REG(RCHANGE),
+				MHL_INT_RC_FEAT_COMPLETE);
+
+	if (stat & BIT_MDT_RFIFO_DATA_RDY)
+		sii8620_read_burst(ctx);
+
+	if (stat & BIT_MDT_XFIFO_EMPTY)
+		sii8620_write(ctx, REG_MDT_XMIT_CTRL, 0);
+
+	sii8620_write(ctx, REG_MDT_INT_0, stat);
+}
+
+static void sii8620_status_dcap_ready(struct sii8620 *ctx)
+{
+	enum sii8620_mode mode;
+
+	mode = ctx->stat[MHL_DST_VERSION] >= 0x30 ? CM_MHL3 : CM_MHL1;
+	if (mode > ctx->mode)
+		sii8620_set_mode(ctx, mode);
+	sii8620_peer_specific_init(ctx);
+	sii8620_write(ctx, REG_INTR9_MASK, BIT_INTR9_DEVCAP_DONE
+		      | BIT_INTR9_EDID_DONE | BIT_INTR9_EDID_ERROR);
+}
+
+static void sii8620_status_changed_path(struct sii8620 *ctx)
+{
+	u8 link_mode;
+
+	if (ctx->use_packed_pixel)
+		link_mode = MHL_DST_LM_CLK_MODE_PACKED_PIXEL;
+	else
+		link_mode = MHL_DST_LM_CLK_MODE_NORMAL;
+
+	if (ctx->stat[MHL_DST_LINK_MODE] & MHL_DST_LM_PATH_ENABLED)
+		link_mode |= MHL_DST_LM_PATH_ENABLED;
+
+	sii8620_mt_write_stat(ctx, MHL_DST_REG(LINK_MODE),
+			      link_mode);
+}
+
+static void sii8620_msc_mr_write_stat(struct sii8620 *ctx)
+{
+	u8 st[MHL_DST_SIZE], xst[MHL_XDS_SIZE];
+
+	sii8620_read_buf(ctx, REG_MHL_STAT_0, st, MHL_DST_SIZE);
+	sii8620_read_buf(ctx, REG_MHL_EXTSTAT_0, xst, MHL_XDS_SIZE);
+
+	sii8620_update_array(ctx->stat, st, MHL_DST_SIZE);
+	sii8620_update_array(ctx->xstat, xst, MHL_XDS_SIZE);
+
+	if (ctx->stat[MHL_DST_CONNECTED_RDY] & st[MHL_DST_CONNECTED_RDY] &
+	    MHL_DST_CONN_DCAP_RDY) {
+		sii8620_status_dcap_ready(ctx);
+
+		if (!sii8620_is_mhl3(ctx))
+			sii8620_mt_read_devcap(ctx, false);
+	}
+
+	if (st[MHL_DST_LINK_MODE] & MHL_DST_LM_PATH_ENABLED)
+		sii8620_status_changed_path(ctx);
+}
+
+static void sii8620_ecbus_up(struct sii8620 *ctx, int ret)
+{
+	if (ret < 0)
+		return;
+
+	sii8620_set_mode(ctx, CM_ECBUS_S);
+}
+
+static void sii8620_got_ecbus_speed(struct sii8620 *ctx, int ret)
+{
+	if (ret < 0)
+		return;
+
+	sii8620_mt_write_stat(ctx, MHL_XDS_REG(CURR_ECBUS_MODE),
+			      MHL_XDS_ECBUS_S | MHL_XDS_SLOT_MODE_8BIT);
+	sii8620_mt_rap(ctx, MHL_RAP_CBUS_MODE_UP);
+	sii8620_mt_set_cont(ctx, sii8620_ecbus_up);
+}
+
+static void sii8620_mhl_burst_emsc_support_set(struct mhl_burst_emsc_support *d,
+	enum mhl_burst_id id)
+{
+	sii8620_mhl_burst_hdr_set(&d->hdr, MHL_BURST_ID_EMSC_SUPPORT);
+	d->num_entries = 1;
+	d->burst_id[0] = cpu_to_be16(id);
+}
+
+static void sii8620_send_features(struct sii8620 *ctx)
+{
+	u8 buf[16];
+
+	sii8620_write(ctx, REG_MDT_XMIT_CTRL, BIT_MDT_XMIT_CTRL_EN
+		| BIT_MDT_XMIT_CTRL_FIXED_BURST_LEN);
+	sii8620_mhl_burst_emsc_support_set((void *)buf,
+		MHL_BURST_ID_HID_PAYLOAD);
+	sii8620_write_buf(ctx, REG_MDT_XMIT_WRITE_PORT, buf, ARRAY_SIZE(buf));
+}
+
+static bool sii8620_rcp_consume(struct sii8620 *ctx, u8 scancode)
+{
+	bool pressed = !(scancode & MHL_RCP_KEY_RELEASED_MASK);
+
+	scancode &= MHL_RCP_KEY_ID_MASK;
+
+	if (!IS_ENABLED(CONFIG_RC_CORE) || !ctx->rc_dev)
+		return false;
+
+	if (pressed)
+		rc_keydown(ctx->rc_dev, RC_PROTO_CEC, scancode, 0);
+	else
+		rc_keyup(ctx->rc_dev);
+
+	return true;
+}
+
+static void sii8620_msc_mr_set_int(struct sii8620 *ctx)
+{
+	u8 ints[MHL_INT_SIZE];
+
+	sii8620_read_buf(ctx, REG_MHL_INT_0, ints, MHL_INT_SIZE);
+	sii8620_write_buf(ctx, REG_MHL_INT_0, ints, MHL_INT_SIZE);
+
+	if (ints[MHL_INT_RCHANGE] & MHL_INT_RC_DCAP_CHG) {
+		switch (ctx->mode) {
+		case CM_MHL3:
+			sii8620_mt_read_xdevcap_reg(ctx, MHL_XDC_ECBUS_SPEEDS);
+			sii8620_mt_set_cont(ctx, sii8620_got_ecbus_speed);
+			break;
+		case CM_ECBUS_S:
+			sii8620_mt_read_devcap(ctx, true);
+			break;
+		default:
+			break;
+		}
+	}
+	if (ints[MHL_INT_RCHANGE] & MHL_INT_RC_FEAT_REQ)
+		sii8620_send_features(ctx);
+	if (ints[MHL_INT_RCHANGE] & MHL_INT_RC_FEAT_COMPLETE) {
+		ctx->feature_complete = true;
+		if (ctx->edid)
+			sii8620_enable_hpd(ctx);
+	}
+}
+
+static struct sii8620_mt_msg *sii8620_msc_msg_first(struct sii8620 *ctx)
+{
+	struct device *dev = ctx->dev;
+
+	if (list_empty(&ctx->mt_queue)) {
+		dev_err(dev, "unexpected MSC MT response\n");
+		return NULL;
+	}
+
+	return list_first_entry(&ctx->mt_queue, struct sii8620_mt_msg, node);
+}
+
+static void sii8620_msc_mt_done(struct sii8620 *ctx)
+{
+	struct sii8620_mt_msg *msg = sii8620_msc_msg_first(ctx);
+
+	if (!msg)
+		return;
+
+	msg->ret = sii8620_readb(ctx, REG_MSC_MT_RCVD_DATA0);
+	ctx->mt_state = MT_STATE_DONE;
+}
+
+static void sii8620_msc_mr_msc_msg(struct sii8620 *ctx)
+{
+	struct sii8620_mt_msg *msg;
+	u8 buf[2];
+
+	sii8620_read_buf(ctx, REG_MSC_MR_MSC_MSG_RCVD_1ST_DATA, buf, 2);
+
+	switch (buf[0]) {
+	case MHL_MSC_MSG_RAPK:
+		msg = sii8620_msc_msg_first(ctx);
+		if (!msg)
+			return;
+		msg->ret = buf[1];
+		ctx->mt_state = MT_STATE_DONE;
+		break;
+	case MHL_MSC_MSG_RCP:
+		if (!sii8620_rcp_consume(ctx, buf[1]))
+			sii8620_mt_rcpe(ctx,
+					MHL_RCPE_STATUS_INEFFECTIVE_KEY_CODE);
+		sii8620_mt_rcpk(ctx, buf[1]);
+		break;
+	default:
+		dev_err(ctx->dev, "%s message type %d,%d not supported",
+			__func__, buf[0], buf[1]);
+	}
+}
+
+static void sii8620_irq_msc(struct sii8620 *ctx)
+{
+	u8 stat = sii8620_readb(ctx, REG_CBUS_INT_0);
+
+	if (stat & ~BIT_CBUS_HPD_CHG)
+		sii8620_write(ctx, REG_CBUS_INT_0, stat & ~BIT_CBUS_HPD_CHG);
+
+	if (stat & BIT_CBUS_HPD_CHG) {
+		u8 cbus_stat = sii8620_readb(ctx, REG_CBUS_STATUS);
+
+		if ((cbus_stat ^ ctx->cbus_status) & BIT_CBUS_STATUS_CBUS_HPD) {
+			sii8620_write(ctx, REG_CBUS_INT_0, BIT_CBUS_HPD_CHG);
+		} else {
+			stat ^= BIT_CBUS_STATUS_CBUS_HPD;
+			cbus_stat ^= BIT_CBUS_STATUS_CBUS_HPD;
+		}
+		ctx->cbus_status = cbus_stat;
+	}
+
+	if (stat & BIT_CBUS_MSC_MR_WRITE_STAT)
+		sii8620_msc_mr_write_stat(ctx);
+
+	if (stat & BIT_CBUS_HPD_CHG) {
+		if (ctx->cbus_status & BIT_CBUS_STATUS_CBUS_HPD) {
+			ctx->sink_detected = true;
+			sii8620_identify_sink(ctx);
+		} else {
+			sii8620_hpd_unplugged(ctx);
+		}
+	}
+
+	if (stat & BIT_CBUS_MSC_MR_SET_INT)
+		sii8620_msc_mr_set_int(ctx);
+
+	if (stat & BIT_CBUS_MSC_MT_DONE)
+		sii8620_msc_mt_done(ctx);
+
+	if (stat & BIT_CBUS_MSC_MR_MSC_MSG)
+		sii8620_msc_mr_msc_msg(ctx);
+}
+
+static void sii8620_irq_coc(struct sii8620 *ctx)
+{
+	u8 stat = sii8620_readb(ctx, REG_COC_INTR);
+
+	if (stat & BIT_COC_CALIBRATION_DONE) {
+		u8 cstat = sii8620_readb(ctx, REG_COC_STAT_0);
+
+		cstat &= BIT_COC_STAT_0_PLL_LOCKED | MSK_COC_STAT_0_FSM_STATE;
+		if (cstat == (BIT_COC_STAT_0_PLL_LOCKED | 0x02)) {
+			sii8620_write_seq_static(ctx,
+				REG_COC_CTLB, 0,
+				REG_TRXINTMH, BIT_TDM_INTR_SYNC_DATA
+					      | BIT_TDM_INTR_SYNC_WAIT
+			);
+		}
+	}
+
+	sii8620_write(ctx, REG_COC_INTR, stat);
+}
+
+static void sii8620_irq_merr(struct sii8620 *ctx)
+{
+	u8 stat = sii8620_readb(ctx, REG_CBUS_INT_1);
+
+	sii8620_write(ctx, REG_CBUS_INT_1, stat);
+}
+
+static void sii8620_irq_edid(struct sii8620 *ctx)
+{
+	u8 stat = sii8620_readb(ctx, REG_INTR9);
+
+	sii8620_write(ctx, REG_INTR9, stat);
+
+	if (stat & BIT_INTR9_DEVCAP_DONE)
+		ctx->mt_state = MT_STATE_DONE;
+}
+
+static void sii8620_irq_scdt(struct sii8620 *ctx)
+{
+	u8 stat = sii8620_readb(ctx, REG_INTR5);
+
+	if (stat & BIT_INTR_SCDT_CHANGE) {
+		u8 cstat = sii8620_readb(ctx, REG_TMDS_CSTAT_P3);
+
+		if (cstat & BIT_TMDS_CSTAT_P3_SCDT)
+			sii8620_start_video(ctx);
+	}
+
+	sii8620_write(ctx, REG_INTR5, stat);
+}
+
+static void sii8620_got_xdevcap(struct sii8620 *ctx, int ret)
+{
+	if (ret < 0)
+		return;
+
+	sii8620_mt_read_devcap(ctx, false);
+}
+
+static void sii8620_irq_tdm(struct sii8620 *ctx)
+{
+	u8 stat = sii8620_readb(ctx, REG_TRXINTH);
+	u8 tdm = sii8620_readb(ctx, REG_TRXSTA2);
+
+	if ((tdm & MSK_TDM_SYNCHRONIZED) == VAL_TDM_SYNCHRONIZED) {
+		ctx->mode = CM_ECBUS_S;
+		ctx->burst.rx_ack = 0;
+		ctx->burst.r_size = SII8620_BURST_BUF_LEN;
+		sii8620_burst_tx_rbuf_info(ctx, SII8620_BURST_BUF_LEN);
+		sii8620_mt_read_devcap(ctx, true);
+		sii8620_mt_set_cont(ctx, sii8620_got_xdevcap);
+	} else {
+		sii8620_write_seq_static(ctx,
+			REG_MHL_PLL_CTL2, 0,
+			REG_MHL_PLL_CTL2, BIT_MHL_PLL_CTL2_CLKDETECT_EN
+		);
+	}
+
+	sii8620_write(ctx, REG_TRXINTH, stat);
+}
+
+static void sii8620_irq_block(struct sii8620 *ctx)
+{
+	u8 stat = sii8620_readb(ctx, REG_EMSCINTR);
+
+	if (stat & BIT_EMSCINTR_SPI_DVLD) {
+		u8 bstat = sii8620_readb(ctx, REG_SPIBURSTSTAT);
+
+		if (bstat & BIT_SPIBURSTSTAT_EMSC_NORMAL_MODE)
+			sii8620_burst_receive(ctx);
+	}
+
+	sii8620_write(ctx, REG_EMSCINTR, stat);
+}
+
+static void sii8620_irq_ddc(struct sii8620 *ctx)
+{
+	u8 stat = sii8620_readb(ctx, REG_INTR3);
+
+	if (stat & BIT_DDC_CMD_DONE) {
+		sii8620_write(ctx, REG_INTR3_MASK, 0);
+		if (sii8620_is_mhl3(ctx) && !ctx->feature_complete)
+			sii8620_mt_set_int(ctx, MHL_INT_REG(RCHANGE),
+					   MHL_INT_RC_FEAT_REQ);
+		else
+			sii8620_enable_hpd(ctx);
+	}
+	sii8620_write(ctx, REG_INTR3, stat);
+}
+
+/* endian agnostic, non-volatile version of test_bit */
+static bool sii8620_test_bit(unsigned int nr, const u8 *addr)
+{
+	return 1 & (addr[nr / BITS_PER_BYTE] >> (nr % BITS_PER_BYTE));
+}
+
+static irqreturn_t sii8620_irq_thread(int irq, void *data)
+{
+	static const struct {
+		int bit;
+		void (*handler)(struct sii8620 *ctx);
+	} irq_vec[] = {
+		{ BIT_FAST_INTR_STAT_DISC, sii8620_irq_disc },
+		{ BIT_FAST_INTR_STAT_G2WB, sii8620_irq_g2wb },
+		{ BIT_FAST_INTR_STAT_COC, sii8620_irq_coc },
+		{ BIT_FAST_INTR_STAT_TDM, sii8620_irq_tdm },
+		{ BIT_FAST_INTR_STAT_MSC, sii8620_irq_msc },
+		{ BIT_FAST_INTR_STAT_MERR, sii8620_irq_merr },
+		{ BIT_FAST_INTR_STAT_BLOCK, sii8620_irq_block },
+		{ BIT_FAST_INTR_STAT_EDID, sii8620_irq_edid },
+		{ BIT_FAST_INTR_STAT_DDC, sii8620_irq_ddc },
+		{ BIT_FAST_INTR_STAT_SCDT, sii8620_irq_scdt },
+	};
+	struct sii8620 *ctx = data;
+	u8 stats[LEN_FAST_INTR_STAT];
+	int i, ret;
+
+	mutex_lock(&ctx->lock);
+
+	sii8620_read_buf(ctx, REG_FAST_INTR_STAT, stats, ARRAY_SIZE(stats));
+	for (i = 0; i < ARRAY_SIZE(irq_vec); ++i)
+		if (sii8620_test_bit(irq_vec[i].bit, stats))
+			irq_vec[i].handler(ctx);
+
+	sii8620_burst_rx_all(ctx);
+	sii8620_mt_work(ctx);
+	sii8620_burst_send(ctx);
+
+	ret = sii8620_clear_error(ctx);
+	if (ret) {
+		dev_err(ctx->dev, "Error during IRQ handling, %d.\n", ret);
+		sii8620_mhl_disconnected(ctx);
+	}
+	mutex_unlock(&ctx->lock);
+
+	return IRQ_HANDLED;
+}
+
+static void sii8620_cable_in(struct sii8620 *ctx)
+{
+	struct device *dev = ctx->dev;
+	u8 ver[5];
+	int ret;
+
+	ret = sii8620_hw_on(ctx);
+	if (ret) {
+		dev_err(dev, "Error powering on, %d.\n", ret);
+		return;
+	}
+
+	sii8620_read_buf(ctx, REG_VND_IDL, ver, ARRAY_SIZE(ver));
+	ret = sii8620_clear_error(ctx);
+	if (ret) {
+		dev_err(dev, "Error accessing I2C bus, %d.\n", ret);
+		return;
+	}
+
+	dev_info(dev, "ChipID %02x%02x:%02x%02x rev %02x.\n", ver[1], ver[0],
+		 ver[3], ver[2], ver[4]);
+
+	sii8620_write(ctx, REG_DPD,
+		      BIT_DPD_PWRON_PLL | BIT_DPD_PDNTX12 | BIT_DPD_OSC_EN);
+
+	sii8620_xtal_set_rate(ctx);
+	sii8620_disconnect(ctx);
+
+	sii8620_write_seq_static(ctx,
+		REG_MHL_CBUS_CTL0, VAL_MHL_CBUS_CTL0_CBUS_DRV_SEL_STRONG
+			| VAL_MHL_CBUS_CTL0_CBUS_RGND_VBIAS_734,
+		REG_MHL_CBUS_CTL1, VAL_MHL_CBUS_CTL1_1115_OHM,
+		REG_DPD, BIT_DPD_PWRON_PLL | BIT_DPD_PDNTX12 | BIT_DPD_OSC_EN,
+	);
+
+	ret = sii8620_clear_error(ctx);
+	if (ret) {
+		dev_err(dev, "Error accessing I2C bus, %d.\n", ret);
+		return;
+	}
+
+	enable_irq(to_i2c_client(ctx->dev)->irq);
+}
+
+static void sii8620_init_rcp_input_dev(struct sii8620 *ctx)
+{
+	struct rc_dev *rc_dev;
+	int ret;
+
+	if (!IS_ENABLED(CONFIG_RC_CORE))
+		return;
+
+	rc_dev = rc_allocate_device(RC_DRIVER_SCANCODE);
+	if (!rc_dev) {
+		dev_err(ctx->dev, "Failed to allocate RC device\n");
+		ctx->error = -ENOMEM;
+		return;
+	}
+
+	rc_dev->input_phys = "sii8620/input0";
+	rc_dev->input_id.bustype = BUS_VIRTUAL;
+	rc_dev->map_name = RC_MAP_CEC;
+	rc_dev->allowed_protocols = RC_PROTO_BIT_CEC;
+	rc_dev->driver_name = "sii8620";
+	rc_dev->device_name = "sii8620";
+
+	ret = rc_register_device(rc_dev);
+
+	if (ret) {
+		dev_err(ctx->dev, "Failed to register RC device\n");
+		ctx->error = ret;
+		rc_free_device(rc_dev);
+		return;
+	}
+	ctx->rc_dev = rc_dev;
+}
+
+static void sii8620_cable_out(struct sii8620 *ctx)
+{
+	disable_irq(to_i2c_client(ctx->dev)->irq);
+	sii8620_hw_off(ctx);
+}
+
+static void sii8620_extcon_work(struct work_struct *work)
+{
+	struct sii8620 *ctx =
+		container_of(work, struct sii8620, extcon_wq);
+	int state = extcon_get_state(ctx->extcon, EXTCON_DISP_MHL);
+
+	if (state == ctx->cable_state)
+		return;
+
+	ctx->cable_state = state;
+
+	if (state > 0)
+		sii8620_cable_in(ctx);
+	else
+		sii8620_cable_out(ctx);
+}
+
+static int sii8620_extcon_notifier(struct notifier_block *self,
+			unsigned long event, void *ptr)
+{
+	struct sii8620 *ctx =
+		container_of(self, struct sii8620, extcon_nb);
+
+	schedule_work(&ctx->extcon_wq);
+
+	return NOTIFY_DONE;
+}
+
+static int sii8620_extcon_init(struct sii8620 *ctx)
+{
+	struct extcon_dev *edev;
+	struct device_node *musb, *muic;
+	int ret;
+
+	/* get micro-USB connector node */
+	musb = of_graph_get_remote_node(ctx->dev->of_node, 1, -1);
+	/* next get micro-USB Interface Controller node */
+	muic = of_get_next_parent(musb);
+
+	if (!muic) {
+		dev_info(ctx->dev, "no extcon found, switching to 'always on' mode\n");
+		return 0;
+	}
+
+	edev = extcon_find_edev_by_node(muic);
+	of_node_put(muic);
+	if (IS_ERR(edev)) {
+		if (PTR_ERR(edev) == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
+		dev_err(ctx->dev, "Invalid or missing extcon\n");
+		return PTR_ERR(edev);
+	}
+
+	ctx->extcon = edev;
+	ctx->extcon_nb.notifier_call = sii8620_extcon_notifier;
+	INIT_WORK(&ctx->extcon_wq, sii8620_extcon_work);
+	ret = extcon_register_notifier(edev, EXTCON_DISP_MHL, &ctx->extcon_nb);
+	if (ret) {
+		dev_err(ctx->dev, "failed to register notifier for MHL\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static inline struct sii8620 *bridge_to_sii8620(struct drm_bridge *bridge)
+{
+	return container_of(bridge, struct sii8620, bridge);
+}
+
+static int sii8620_attach(struct drm_bridge *bridge,
+			  enum drm_bridge_attach_flags flags)
+{
+	struct sii8620 *ctx = bridge_to_sii8620(bridge);
+
+	sii8620_init_rcp_input_dev(ctx);
+
+	return sii8620_clear_error(ctx);
+}
+
+static void sii8620_detach(struct drm_bridge *bridge)
+{
+	struct sii8620 *ctx = bridge_to_sii8620(bridge);
+
+	if (!IS_ENABLED(CONFIG_RC_CORE))
+		return;
+
+	rc_unregister_device(ctx->rc_dev);
+}
+
+static int sii8620_is_packing_required(struct sii8620 *ctx,
+				       const struct drm_display_mode *mode)
+{
+	int max_pclk, max_pclk_pp_mode;
+
+	if (sii8620_is_mhl3(ctx)) {
+		max_pclk = MHL3_MAX_PCLK;
+		max_pclk_pp_mode = MHL3_MAX_PCLK_PP_MODE;
+	} else {
+		max_pclk = MHL1_MAX_PCLK;
+		max_pclk_pp_mode = MHL1_MAX_PCLK_PP_MODE;
+	}
+
+	if (mode->clock < max_pclk)
+		return 0;
+	else if (mode->clock < max_pclk_pp_mode)
+		return 1;
+	else
+		return -1;
+}
+
+static enum drm_mode_status sii8620_mode_valid(struct drm_bridge *bridge,
+					 const struct drm_display_info *info,
+					 const struct drm_display_mode *mode)
+{
+	struct sii8620 *ctx = bridge_to_sii8620(bridge);
+	int pack_required = sii8620_is_packing_required(ctx, mode);
+	bool can_pack = ctx->devcap[MHL_DCAP_VID_LINK_MODE] &
+			MHL_DCAP_VID_LINK_PPIXEL;
+
+	switch (pack_required) {
+	case 0:
+		return MODE_OK;
+	case 1:
+		return (can_pack) ? MODE_OK : MODE_CLOCK_HIGH;
+	default:
+		return MODE_CLOCK_HIGH;
+	}
+}
+
+static bool sii8620_mode_fixup(struct drm_bridge *bridge,
+			       const struct drm_display_mode *mode,
+			       struct drm_display_mode *adjusted_mode)
+{
+	struct sii8620 *ctx = bridge_to_sii8620(bridge);
+
+	mutex_lock(&ctx->lock);
+
+	ctx->use_packed_pixel = sii8620_is_packing_required(ctx, adjusted_mode);
+
+	mutex_unlock(&ctx->lock);
+
+	return true;
+}
+
+static const struct drm_bridge_funcs sii8620_bridge_funcs = {
+	.attach = sii8620_attach,
+	.detach = sii8620_detach,
+	.mode_fixup = sii8620_mode_fixup,
+	.mode_valid = sii8620_mode_valid,
+};
+
+static int sii8620_probe(struct i2c_client *client)
+{
+	struct device *dev = &client->dev;
+	struct sii8620 *ctx;
+	int ret;
+
+	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+	if (!ctx)
+		return -ENOMEM;
+
+	ctx->dev = dev;
+	mutex_init(&ctx->lock);
+	INIT_LIST_HEAD(&ctx->mt_queue);
+
+	ctx->clk_xtal = devm_clk_get(dev, "xtal");
+	if (IS_ERR(ctx->clk_xtal))
+		return dev_err_probe(dev, PTR_ERR(ctx->clk_xtal),
+				     "failed to get xtal clock from DT\n");
+
+	if (!client->irq) {
+		dev_err(dev, "no irq provided\n");
+		return -EINVAL;
+	}
+	irq_set_status_flags(client->irq, IRQ_NOAUTOEN);
+	ret = devm_request_threaded_irq(dev, client->irq, NULL,
+					sii8620_irq_thread,
+					IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
+					"sii8620", ctx);
+	if (ret < 0)
+		return dev_err_probe(dev, ret,
+				     "failed to install IRQ handler\n");
+
+	ctx->gpio_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+	if (IS_ERR(ctx->gpio_reset))
+		return dev_err_probe(dev, PTR_ERR(ctx->gpio_reset),
+				     "failed to get reset gpio from DT\n");
+
+	ctx->supplies[0].supply = "cvcc10";
+	ctx->supplies[1].supply = "iovcc18";
+	ret = devm_regulator_bulk_get(dev, 2, ctx->supplies);
+	if (ret)
+		return ret;
+
+	ret = sii8620_extcon_init(ctx);
+	if (ret < 0) {
+		dev_err(ctx->dev, "failed to initialize EXTCON\n");
+		return ret;
+	}
+
+	i2c_set_clientdata(client, ctx);
+
+	ctx->bridge.funcs = &sii8620_bridge_funcs;
+	ctx->bridge.of_node = dev->of_node;
+	drm_bridge_add(&ctx->bridge);
+
+	if (!ctx->extcon)
+		sii8620_cable_in(ctx);
+
+	return 0;
+}
+
+static void sii8620_remove(struct i2c_client *client)
+{
+	struct sii8620 *ctx = i2c_get_clientdata(client);
+
+	if (ctx->extcon) {
+		extcon_unregister_notifier(ctx->extcon, EXTCON_DISP_MHL,
+					   &ctx->extcon_nb);
+		flush_work(&ctx->extcon_wq);
+		if (ctx->cable_state > 0)
+			sii8620_cable_out(ctx);
+	} else {
+		sii8620_cable_out(ctx);
+	}
+	drm_bridge_remove(&ctx->bridge);
+}
+
+static const struct of_device_id sii8620_dt_match[] = {
+	{ .compatible = "sil,sii8620" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, sii8620_dt_match);
+
+static const struct i2c_device_id sii8620_id[] = {
+	{ "sii8620", 0 },
+	{ },
+};
+
+MODULE_DEVICE_TABLE(i2c, sii8620_id);
+static struct i2c_driver sii8620_driver = {
+	.driver = {
+		.name	= "sii8620",
+		.of_match_table = sii8620_dt_match,
+	},
+	.probe		= sii8620_probe,
+	.remove		= sii8620_remove,
+	.id_table = sii8620_id,
+};
+
+module_i2c_driver(sii8620_driver);
+MODULE_LICENSE("GPL v2");