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linux-zen-server/drivers/gpu/drm/bridge/sil-sii8620.c

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Initial commit
2023-08-30 17:53:23 +02:00
// 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 = of_match_ptr(sii8620_dt_match),
},
.probe_new = sii8620_probe,
.remove = sii8620_remove,
.id_table = sii8620_id,
};
module_i2c_driver(sii8620_driver);
MODULE_LICENSE("GPL v2");