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linux/drivers/media/i2c/tc358743.c
Tom Rix 274cf92d5d media: tc358743: initialize variable 
clang static analysis flags this error

tc358743.c:1468:9: warning: Branch condition evaluates
  to a garbage value
        return handled ? IRQ_HANDLED : IRQ_NONE;
               ^~~~~~~
handled should be initialized to false.

Fixes: d747b806ab ("[media] tc358743: add direct interrupt handling")
Signed-off-by: Tom Rix <trix@redhat.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-09-26 10:24:09 +02:00

2231 lines
59 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
/*
* tc358743 - Toshiba HDMI to CSI-2 bridge
*
* Copyright 2015 Cisco Systems, Inc. and/or its affiliates. All rights
* reserved.
*/
/*
* References (c = chapter, p = page):
* REF_01 - Toshiba, TC358743XBG (H2C), Functional Specification, Rev 0.60
* REF_02 - Toshiba, TC358743XBG_HDMI-CSI_Tv11p_nm.xls
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/interrupt.h>
#include <linux/timer.h>
#include <linux/of_graph.h>
#include <linux/videodev2.h>
#include <linux/workqueue.h>
#include <linux/v4l2-dv-timings.h>
#include <linux/hdmi.h>
#include <media/cec.h>
#include <media/v4l2-dv-timings.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-event.h>
#include <media/v4l2-fwnode.h>
#include <media/i2c/tc358743.h>
#include "tc358743_regs.h"
static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "debug level (0-3)");
MODULE_DESCRIPTION("Toshiba TC358743 HDMI to CSI-2 bridge driver");
MODULE_AUTHOR("Ramakrishnan Muthukrishnan <ram@rkrishnan.org>");
MODULE_AUTHOR("Mikhail Khelik <mkhelik@cisco.com>");
MODULE_AUTHOR("Mats Randgaard <matrandg@cisco.com>");
MODULE_LICENSE("GPL");
#define EDID_NUM_BLOCKS_MAX 8
#define EDID_BLOCK_SIZE 128
#define I2C_MAX_XFER_SIZE (EDID_BLOCK_SIZE + 2)
#define POLL_INTERVAL_CEC_MS 10
#define POLL_INTERVAL_MS 1000
static const struct v4l2_dv_timings_cap tc358743_timings_cap = {
.type = V4L2_DV_BT_656_1120,
/* keep this initialization for compatibility with GCC < 4.4.6 */
.reserved = { 0 },
/* Pixel clock from REF_01 p. 20. Min/max height/width are unknown */
V4L2_INIT_BT_TIMINGS(640, 1920, 350, 1200, 13000000, 165000000,
V4L2_DV_BT_STD_CEA861 | V4L2_DV_BT_STD_DMT |
V4L2_DV_BT_STD_GTF | V4L2_DV_BT_STD_CVT,
V4L2_DV_BT_CAP_PROGRESSIVE |
V4L2_DV_BT_CAP_REDUCED_BLANKING |
V4L2_DV_BT_CAP_CUSTOM)
};
struct tc358743_state {
struct tc358743_platform_data pdata;
struct v4l2_fwnode_bus_mipi_csi2 bus;
struct v4l2_subdev sd;
struct media_pad pad;
struct v4l2_ctrl_handler hdl;
struct i2c_client *i2c_client;
/* CONFCTL is modified in ops and tc358743_hdmi_sys_int_handler */
struct mutex confctl_mutex;
/* controls */
struct v4l2_ctrl *detect_tx_5v_ctrl;
struct v4l2_ctrl *audio_sampling_rate_ctrl;
struct v4l2_ctrl *audio_present_ctrl;
struct delayed_work delayed_work_enable_hotplug;
struct timer_list timer;
struct work_struct work_i2c_poll;
/* edid */
u8 edid_blocks_written;
struct v4l2_dv_timings timings;
u32 mbus_fmt_code;
u8 csi_lanes_in_use;
struct gpio_desc *reset_gpio;
struct cec_adapter *cec_adap;
};
static void tc358743_enable_interrupts(struct v4l2_subdev *sd,
bool cable_connected);
static int tc358743_s_ctrl_detect_tx_5v(struct v4l2_subdev *sd);
static inline struct tc358743_state *to_state(struct v4l2_subdev *sd)
{
return container_of(sd, struct tc358743_state, sd);
}
/* --------------- I2C --------------- */
static void i2c_rd(struct v4l2_subdev *sd, u16 reg, u8 *values, u32 n)
{
struct tc358743_state *state = to_state(sd);
struct i2c_client *client = state->i2c_client;
int err;
u8 buf[2] = { reg >> 8, reg & 0xff };
struct i2c_msg msgs[] = {
{
.addr = client->addr,
.flags = 0,
.len = 2,
.buf = buf,
},
{
.addr = client->addr,
.flags = I2C_M_RD,
.len = n,
.buf = values,
},
};
err = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
if (err != ARRAY_SIZE(msgs)) {
v4l2_err(sd, "%s: reading register 0x%x from 0x%x failed\n",
__func__, reg, client->addr);
}
}
static void i2c_wr(struct v4l2_subdev *sd, u16 reg, u8 *values, u32 n)
{
struct tc358743_state *state = to_state(sd);
struct i2c_client *client = state->i2c_client;
int err, i;
struct i2c_msg msg;
u8 data[I2C_MAX_XFER_SIZE];
if ((2 + n) > I2C_MAX_XFER_SIZE) {
n = I2C_MAX_XFER_SIZE - 2;
v4l2_warn(sd, "i2c wr reg=%04x: len=%d is too big!\n",
reg, 2 + n);
}
msg.addr = client->addr;
msg.buf = data;
msg.len = 2 + n;
msg.flags = 0;
data[0] = reg >> 8;
data[1] = reg & 0xff;
for (i = 0; i < n; i++)
data[2 + i] = values[i];
err = i2c_transfer(client->adapter, &msg, 1);
if (err != 1) {
v4l2_err(sd, "%s: writing register 0x%x from 0x%x failed\n",
__func__, reg, client->addr);
return;
}
if (debug < 3)
return;
switch (n) {
case 1:
v4l2_info(sd, "I2C write 0x%04x = 0x%02x",
reg, data[2]);
break;
case 2:
v4l2_info(sd, "I2C write 0x%04x = 0x%02x%02x",
reg, data[3], data[2]);
break;
case 4:
v4l2_info(sd, "I2C write 0x%04x = 0x%02x%02x%02x%02x",
reg, data[5], data[4], data[3], data[2]);
break;
default:
v4l2_info(sd, "I2C write %d bytes from address 0x%04x\n",
n, reg);
}
}
static noinline u32 i2c_rdreg(struct v4l2_subdev *sd, u16 reg, u32 n)
{
__le32 val = 0;
i2c_rd(sd, reg, (u8 __force *)&val, n);
return le32_to_cpu(val);
}
static noinline void i2c_wrreg(struct v4l2_subdev *sd, u16 reg, u32 val, u32 n)
{
__le32 raw = cpu_to_le32(val);
i2c_wr(sd, reg, (u8 __force *)&raw, n);
}
static u8 i2c_rd8(struct v4l2_subdev *sd, u16 reg)
{
return i2c_rdreg(sd, reg, 1);
}
static void i2c_wr8(struct v4l2_subdev *sd, u16 reg, u8 val)
{
i2c_wrreg(sd, reg, val, 1);
}
static void i2c_wr8_and_or(struct v4l2_subdev *sd, u16 reg,
u8 mask, u8 val)
{
i2c_wrreg(sd, reg, (i2c_rdreg(sd, reg, 1) & mask) | val, 1);
}
static u16 i2c_rd16(struct v4l2_subdev *sd, u16 reg)
{
return i2c_rdreg(sd, reg, 2);
}
static void i2c_wr16(struct v4l2_subdev *sd, u16 reg, u16 val)
{
i2c_wrreg(sd, reg, val, 2);
}
static void i2c_wr16_and_or(struct v4l2_subdev *sd, u16 reg, u16 mask, u16 val)
{
i2c_wrreg(sd, reg, (i2c_rdreg(sd, reg, 2) & mask) | val, 2);
}
static u32 i2c_rd32(struct v4l2_subdev *sd, u16 reg)
{
return i2c_rdreg(sd, reg, 4);
}
static void i2c_wr32(struct v4l2_subdev *sd, u16 reg, u32 val)
{
i2c_wrreg(sd, reg, val, 4);
}
/* --------------- STATUS --------------- */
static inline bool is_hdmi(struct v4l2_subdev *sd)
{
return i2c_rd8(sd, SYS_STATUS) & MASK_S_HDMI;
}
static inline bool tx_5v_power_present(struct v4l2_subdev *sd)
{
return i2c_rd8(sd, SYS_STATUS) & MASK_S_DDC5V;
}
static inline bool no_signal(struct v4l2_subdev *sd)
{
return !(i2c_rd8(sd, SYS_STATUS) & MASK_S_TMDS);
}
static inline bool no_sync(struct v4l2_subdev *sd)
{
return !(i2c_rd8(sd, SYS_STATUS) & MASK_S_SYNC);
}
static inline bool audio_present(struct v4l2_subdev *sd)
{
return i2c_rd8(sd, AU_STATUS0) & MASK_S_A_SAMPLE;
}
static int get_audio_sampling_rate(struct v4l2_subdev *sd)
{
static const int code_to_rate[] = {
44100, 0, 48000, 32000, 22050, 384000, 24000, 352800,
88200, 768000, 96000, 705600, 176400, 0, 192000, 0
};
/* Register FS_SET is not cleared when the cable is disconnected */
if (no_signal(sd))
return 0;
return code_to_rate[i2c_rd8(sd, FS_SET) & MASK_FS];
}
/* --------------- TIMINGS --------------- */
static inline unsigned fps(const struct v4l2_bt_timings *t)
{
if (!V4L2_DV_BT_FRAME_HEIGHT(t) || !V4L2_DV_BT_FRAME_WIDTH(t))
return 0;
return DIV_ROUND_CLOSEST((unsigned)t->pixelclock,
V4L2_DV_BT_FRAME_HEIGHT(t) * V4L2_DV_BT_FRAME_WIDTH(t));
}
static int tc358743_get_detected_timings(struct v4l2_subdev *sd,
struct v4l2_dv_timings *timings)
{
struct v4l2_bt_timings *bt = &timings->bt;
unsigned width, height, frame_width, frame_height, frame_interval, fps;
memset(timings, 0, sizeof(struct v4l2_dv_timings));
if (no_signal(sd)) {
v4l2_dbg(1, debug, sd, "%s: no valid signal\n", __func__);
return -ENOLINK;
}
if (no_sync(sd)) {
v4l2_dbg(1, debug, sd, "%s: no sync on signal\n", __func__);
return -ENOLCK;
}
timings->type = V4L2_DV_BT_656_1120;
bt->interlaced = i2c_rd8(sd, VI_STATUS1) & MASK_S_V_INTERLACE ?
V4L2_DV_INTERLACED : V4L2_DV_PROGRESSIVE;
width = ((i2c_rd8(sd, DE_WIDTH_H_HI) & 0x1f) << 8) +
i2c_rd8(sd, DE_WIDTH_H_LO);
height = ((i2c_rd8(sd, DE_WIDTH_V_HI) & 0x1f) << 8) +
i2c_rd8(sd, DE_WIDTH_V_LO);
frame_width = ((i2c_rd8(sd, H_SIZE_HI) & 0x1f) << 8) +
i2c_rd8(sd, H_SIZE_LO);
frame_height = (((i2c_rd8(sd, V_SIZE_HI) & 0x3f) << 8) +
i2c_rd8(sd, V_SIZE_LO)) / 2;
/* frame interval in milliseconds * 10
* Require SYS_FREQ0 and SYS_FREQ1 are precisely set */
frame_interval = ((i2c_rd8(sd, FV_CNT_HI) & 0x3) << 8) +
i2c_rd8(sd, FV_CNT_LO);
fps = (frame_interval > 0) ?
DIV_ROUND_CLOSEST(10000, frame_interval) : 0;
bt->width = width;
bt->height = height;
bt->vsync = frame_height - height;
bt->hsync = frame_width - width;
bt->pixelclock = frame_width * frame_height * fps;
if (bt->interlaced == V4L2_DV_INTERLACED) {
bt->height *= 2;
bt->il_vsync = bt->vsync + 1;
bt->pixelclock /= 2;
}
return 0;
}
/* --------------- HOTPLUG / HDCP / EDID --------------- */
static void tc358743_delayed_work_enable_hotplug(struct work_struct *work)
{
struct delayed_work *dwork = to_delayed_work(work);
struct tc358743_state *state = container_of(dwork,
struct tc358743_state, delayed_work_enable_hotplug);
struct v4l2_subdev *sd = &state->sd;
v4l2_dbg(2, debug, sd, "%s:\n", __func__);
i2c_wr8_and_or(sd, HPD_CTL, ~MASK_HPD_OUT0, MASK_HPD_OUT0);
}
static void tc358743_set_hdmi_hdcp(struct v4l2_subdev *sd, bool enable)
{
v4l2_dbg(2, debug, sd, "%s: %s\n", __func__, enable ?
"enable" : "disable");
if (enable) {
i2c_wr8_and_or(sd, HDCP_REG3, ~KEY_RD_CMD, KEY_RD_CMD);
i2c_wr8_and_or(sd, HDCP_MODE, ~MASK_MANUAL_AUTHENTICATION, 0);
i2c_wr8_and_or(sd, HDCP_REG1, 0xff,
MASK_AUTH_UNAUTH_SEL_16_FRAMES |
MASK_AUTH_UNAUTH_AUTO);
i2c_wr8_and_or(sd, HDCP_REG2, ~MASK_AUTO_P3_RESET,
SET_AUTO_P3_RESET_FRAMES(0x0f));
} else {
i2c_wr8_and_or(sd, HDCP_MODE, ~MASK_MANUAL_AUTHENTICATION,
MASK_MANUAL_AUTHENTICATION);
}
}
static void tc358743_disable_edid(struct v4l2_subdev *sd)
{
struct tc358743_state *state = to_state(sd);
v4l2_dbg(2, debug, sd, "%s:\n", __func__);
cancel_delayed_work_sync(&state->delayed_work_enable_hotplug);
/* DDC access to EDID is also disabled when hotplug is disabled. See
* register DDC_CTL */
i2c_wr8_and_or(sd, HPD_CTL, ~MASK_HPD_OUT0, 0x0);
}
static void tc358743_enable_edid(struct v4l2_subdev *sd)
{
struct tc358743_state *state = to_state(sd);
if (state->edid_blocks_written == 0) {
v4l2_dbg(2, debug, sd, "%s: no EDID -> no hotplug\n", __func__);
tc358743_s_ctrl_detect_tx_5v(sd);
return;
}
v4l2_dbg(2, debug, sd, "%s:\n", __func__);
/* Enable hotplug after 100 ms. DDC access to EDID is also enabled when
* hotplug is enabled. See register DDC_CTL */
schedule_delayed_work(&state->delayed_work_enable_hotplug, HZ / 10);
tc358743_enable_interrupts(sd, true);
tc358743_s_ctrl_detect_tx_5v(sd);
}
static void tc358743_erase_bksv(struct v4l2_subdev *sd)
{
int i;
for (i = 0; i < 5; i++)
i2c_wr8(sd, BKSV + i, 0);
}
/* --------------- AVI infoframe --------------- */
static void print_avi_infoframe(struct v4l2_subdev *sd)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct device *dev = &client->dev;
union hdmi_infoframe frame;
u8 buffer[HDMI_INFOFRAME_SIZE(AVI)];
if (!is_hdmi(sd)) {
v4l2_info(sd, "DVI-D signal - AVI infoframe not supported\n");
return;
}
i2c_rd(sd, PK_AVI_0HEAD, buffer, HDMI_INFOFRAME_SIZE(AVI));
if (hdmi_infoframe_unpack(&frame, buffer, sizeof(buffer)) < 0) {
v4l2_err(sd, "%s: unpack of AVI infoframe failed\n", __func__);
return;
}
hdmi_infoframe_log(KERN_INFO, dev, &frame);
}
/* --------------- CTRLS --------------- */
static int tc358743_s_ctrl_detect_tx_5v(struct v4l2_subdev *sd)
{
struct tc358743_state *state = to_state(sd);
return v4l2_ctrl_s_ctrl(state->detect_tx_5v_ctrl,
tx_5v_power_present(sd));
}
static int tc358743_s_ctrl_audio_sampling_rate(struct v4l2_subdev *sd)
{
struct tc358743_state *state = to_state(sd);
return v4l2_ctrl_s_ctrl(state->audio_sampling_rate_ctrl,
get_audio_sampling_rate(sd));
}
static int tc358743_s_ctrl_audio_present(struct v4l2_subdev *sd)
{
struct tc358743_state *state = to_state(sd);
return v4l2_ctrl_s_ctrl(state->audio_present_ctrl,
audio_present(sd));
}
static int tc358743_update_controls(struct v4l2_subdev *sd)
{
int ret = 0;
ret |= tc358743_s_ctrl_detect_tx_5v(sd);
ret |= tc358743_s_ctrl_audio_sampling_rate(sd);
ret |= tc358743_s_ctrl_audio_present(sd);
return ret;
}
/* --------------- INIT --------------- */
static void tc358743_reset_phy(struct v4l2_subdev *sd)
{
v4l2_dbg(1, debug, sd, "%s:\n", __func__);
i2c_wr8_and_or(sd, PHY_RST, ~MASK_RESET_CTRL, 0);
i2c_wr8_and_or(sd, PHY_RST, ~MASK_RESET_CTRL, MASK_RESET_CTRL);
}
static void tc358743_reset(struct v4l2_subdev *sd, uint16_t mask)
{
u16 sysctl = i2c_rd16(sd, SYSCTL);
i2c_wr16(sd, SYSCTL, sysctl | mask);
i2c_wr16(sd, SYSCTL, sysctl & ~mask);
}
static inline void tc358743_sleep_mode(struct v4l2_subdev *sd, bool enable)
{
i2c_wr16_and_or(sd, SYSCTL, ~MASK_SLEEP,
enable ? MASK_SLEEP : 0);
}
static inline void enable_stream(struct v4l2_subdev *sd, bool enable)
{
struct tc358743_state *state = to_state(sd);
v4l2_dbg(3, debug, sd, "%s: %sable\n",
__func__, enable ? "en" : "dis");
if (enable) {
/* It is critical for CSI receiver to see lane transition
* LP11->HS. Set to non-continuous mode to enable clock lane
* LP11 state. */
i2c_wr32(sd, TXOPTIONCNTRL, 0);
/* Set to continuous mode to trigger LP11->HS transition */
i2c_wr32(sd, TXOPTIONCNTRL, MASK_CONTCLKMODE);
/* Unmute video */
i2c_wr8(sd, VI_MUTE, MASK_AUTO_MUTE);
} else {
/* Mute video so that all data lanes go to LSP11 state.
* No data is output to CSI Tx block. */
i2c_wr8(sd, VI_MUTE, MASK_AUTO_MUTE | MASK_VI_MUTE);
}
mutex_lock(&state->confctl_mutex);
i2c_wr16_and_or(sd, CONFCTL, ~(MASK_VBUFEN | MASK_ABUFEN),
enable ? (MASK_VBUFEN | MASK_ABUFEN) : 0x0);
mutex_unlock(&state->confctl_mutex);
}
static void tc358743_set_pll(struct v4l2_subdev *sd)
{
struct tc358743_state *state = to_state(sd);
struct tc358743_platform_data *pdata = &state->pdata;
u16 pllctl0 = i2c_rd16(sd, PLLCTL0);
u16 pllctl1 = i2c_rd16(sd, PLLCTL1);
u16 pllctl0_new = SET_PLL_PRD(pdata->pll_prd) |
SET_PLL_FBD(pdata->pll_fbd);
u32 hsck = (pdata->refclk_hz / pdata->pll_prd) * pdata->pll_fbd;
v4l2_dbg(2, debug, sd, "%s:\n", __func__);
/* Only rewrite when needed (new value or disabled), since rewriting
* triggers another format change event. */
if ((pllctl0 != pllctl0_new) || ((pllctl1 & MASK_PLL_EN) == 0)) {
u16 pll_frs;
if (hsck > 500000000)
pll_frs = 0x0;
else if (hsck > 250000000)
pll_frs = 0x1;
else if (hsck > 125000000)
pll_frs = 0x2;
else
pll_frs = 0x3;
v4l2_dbg(1, debug, sd, "%s: updating PLL clock\n", __func__);
tc358743_sleep_mode(sd, true);
i2c_wr16(sd, PLLCTL0, pllctl0_new);
i2c_wr16_and_or(sd, PLLCTL1,
~(MASK_PLL_FRS | MASK_RESETB | MASK_PLL_EN),
(SET_PLL_FRS(pll_frs) | MASK_RESETB |
MASK_PLL_EN));
udelay(10); /* REF_02, Sheet "Source HDMI" */
i2c_wr16_and_or(sd, PLLCTL1, ~MASK_CKEN, MASK_CKEN);
tc358743_sleep_mode(sd, false);
}
}
static void tc358743_set_ref_clk(struct v4l2_subdev *sd)
{
struct tc358743_state *state = to_state(sd);
struct tc358743_platform_data *pdata = &state->pdata;
u32 sys_freq;
u32 lockdet_ref;
u32 cec_freq;
u16 fh_min;
u16 fh_max;
BUG_ON(!(pdata->refclk_hz == 26000000 ||
pdata->refclk_hz == 27000000 ||
pdata->refclk_hz == 42000000));
sys_freq = pdata->refclk_hz / 10000;
i2c_wr8(sd, SYS_FREQ0, sys_freq & 0x00ff);
i2c_wr8(sd, SYS_FREQ1, (sys_freq & 0xff00) >> 8);
i2c_wr8_and_or(sd, PHY_CTL0, ~MASK_PHY_SYSCLK_IND,
(pdata->refclk_hz == 42000000) ?
MASK_PHY_SYSCLK_IND : 0x0);
fh_min = pdata->refclk_hz / 100000;
i2c_wr8(sd, FH_MIN0, fh_min & 0x00ff);
i2c_wr8(sd, FH_MIN1, (fh_min & 0xff00) >> 8);
fh_max = (fh_min * 66) / 10;
i2c_wr8(sd, FH_MAX0, fh_max & 0x00ff);
i2c_wr8(sd, FH_MAX1, (fh_max & 0xff00) >> 8);
lockdet_ref = pdata->refclk_hz / 100;
i2c_wr8(sd, LOCKDET_REF0, lockdet_ref & 0x0000ff);
i2c_wr8(sd, LOCKDET_REF1, (lockdet_ref & 0x00ff00) >> 8);
i2c_wr8(sd, LOCKDET_REF2, (lockdet_ref & 0x0f0000) >> 16);
i2c_wr8_and_or(sd, NCO_F0_MOD, ~MASK_NCO_F0_MOD,
(pdata->refclk_hz == 27000000) ?
MASK_NCO_F0_MOD_27MHZ : 0x0);
/*
* Trial and error suggests that the default register value
* of 656 is for a 42 MHz reference clock. Use that to derive
* a new value based on the actual reference clock.
*/
cec_freq = (656 * sys_freq) / 4200;
i2c_wr16(sd, CECHCLK, cec_freq);
i2c_wr16(sd, CECLCLK, cec_freq);
}
static void tc358743_set_csi_color_space(struct v4l2_subdev *sd)
{
struct tc358743_state *state = to_state(sd);
switch (state->mbus_fmt_code) {
case MEDIA_BUS_FMT_UYVY8_1X16:
v4l2_dbg(2, debug, sd, "%s: YCbCr 422 16-bit\n", __func__);
i2c_wr8_and_or(sd, VOUT_SET2,
~(MASK_SEL422 | MASK_VOUT_422FIL_100) & 0xff,
MASK_SEL422 | MASK_VOUT_422FIL_100);
i2c_wr8_and_or(sd, VI_REP, ~MASK_VOUT_COLOR_SEL & 0xff,
MASK_VOUT_COLOR_601_YCBCR_LIMITED);
mutex_lock(&state->confctl_mutex);
i2c_wr16_and_or(sd, CONFCTL, ~MASK_YCBCRFMT,
MASK_YCBCRFMT_422_8_BIT);
mutex_unlock(&state->confctl_mutex);
break;
case MEDIA_BUS_FMT_RGB888_1X24:
v4l2_dbg(2, debug, sd, "%s: RGB 888 24-bit\n", __func__);
i2c_wr8_and_or(sd, VOUT_SET2,
~(MASK_SEL422 | MASK_VOUT_422FIL_100) & 0xff,
0x00);
i2c_wr8_and_or(sd, VI_REP, ~MASK_VOUT_COLOR_SEL & 0xff,
MASK_VOUT_COLOR_RGB_FULL);
mutex_lock(&state->confctl_mutex);
i2c_wr16_and_or(sd, CONFCTL, ~MASK_YCBCRFMT, 0);
mutex_unlock(&state->confctl_mutex);
break;
default:
v4l2_dbg(2, debug, sd, "%s: Unsupported format code 0x%x\n",
__func__, state->mbus_fmt_code);
}
}
static unsigned tc358743_num_csi_lanes_needed(struct v4l2_subdev *sd)
{
struct tc358743_state *state = to_state(sd);
struct v4l2_bt_timings *bt = &state->timings.bt;
struct tc358743_platform_data *pdata = &state->pdata;
u32 bits_pr_pixel =
(state->mbus_fmt_code == MEDIA_BUS_FMT_UYVY8_1X16) ? 16 : 24;
u32 bps = bt->width * bt->height * fps(bt) * bits_pr_pixel;
u32 bps_pr_lane = (pdata->refclk_hz / pdata->pll_prd) * pdata->pll_fbd;
return DIV_ROUND_UP(bps, bps_pr_lane);
}
static void tc358743_set_csi(struct v4l2_subdev *sd)
{
struct tc358743_state *state = to_state(sd);
struct tc358743_platform_data *pdata = &state->pdata;
unsigned lanes = tc358743_num_csi_lanes_needed(sd);
v4l2_dbg(3, debug, sd, "%s:\n", __func__);
state->csi_lanes_in_use = lanes;
tc358743_reset(sd, MASK_CTXRST);
if (lanes < 1)
i2c_wr32(sd, CLW_CNTRL, MASK_CLW_LANEDISABLE);
if (lanes < 1)
i2c_wr32(sd, D0W_CNTRL, MASK_D0W_LANEDISABLE);
if (lanes < 2)
i2c_wr32(sd, D1W_CNTRL, MASK_D1W_LANEDISABLE);
if (lanes < 3)
i2c_wr32(sd, D2W_CNTRL, MASK_D2W_LANEDISABLE);
if (lanes < 4)
i2c_wr32(sd, D3W_CNTRL, MASK_D3W_LANEDISABLE);
i2c_wr32(sd, LINEINITCNT, pdata->lineinitcnt);
i2c_wr32(sd, LPTXTIMECNT, pdata->lptxtimecnt);
i2c_wr32(sd, TCLK_HEADERCNT, pdata->tclk_headercnt);
i2c_wr32(sd, TCLK_TRAILCNT, pdata->tclk_trailcnt);
i2c_wr32(sd, THS_HEADERCNT, pdata->ths_headercnt);
i2c_wr32(sd, TWAKEUP, pdata->twakeup);
i2c_wr32(sd, TCLK_POSTCNT, pdata->tclk_postcnt);
i2c_wr32(sd, THS_TRAILCNT, pdata->ths_trailcnt);
i2c_wr32(sd, HSTXVREGCNT, pdata->hstxvregcnt);
i2c_wr32(sd, HSTXVREGEN,
((lanes > 0) ? MASK_CLM_HSTXVREGEN : 0x0) |
((lanes > 0) ? MASK_D0M_HSTXVREGEN : 0x0) |
((lanes > 1) ? MASK_D1M_HSTXVREGEN : 0x0) |
((lanes > 2) ? MASK_D2M_HSTXVREGEN : 0x0) |
((lanes > 3) ? MASK_D3M_HSTXVREGEN : 0x0));
i2c_wr32(sd, TXOPTIONCNTRL, (state->bus.flags &
V4L2_MBUS_CSI2_CONTINUOUS_CLOCK) ? MASK_CONTCLKMODE : 0);
i2c_wr32(sd, STARTCNTRL, MASK_START);
i2c_wr32(sd, CSI_START, MASK_STRT);
i2c_wr32(sd, CSI_CONFW, MASK_MODE_SET |
MASK_ADDRESS_CSI_CONTROL |
MASK_CSI_MODE |
MASK_TXHSMD |
((lanes == 4) ? MASK_NOL_4 :
(lanes == 3) ? MASK_NOL_3 :
(lanes == 2) ? MASK_NOL_2 : MASK_NOL_1));
i2c_wr32(sd, CSI_CONFW, MASK_MODE_SET |
MASK_ADDRESS_CSI_ERR_INTENA | MASK_TXBRK | MASK_QUNK |
MASK_WCER | MASK_INER);
i2c_wr32(sd, CSI_CONFW, MASK_MODE_CLEAR |
MASK_ADDRESS_CSI_ERR_HALT | MASK_TXBRK | MASK_QUNK);
i2c_wr32(sd, CSI_CONFW, MASK_MODE_SET |
MASK_ADDRESS_CSI_INT_ENA | MASK_INTER);
}
static void tc358743_set_hdmi_phy(struct v4l2_subdev *sd)
{
struct tc358743_state *state = to_state(sd);
struct tc358743_platform_data *pdata = &state->pdata;
/* Default settings from REF_02, sheet "Source HDMI"
* and custom settings as platform data */
i2c_wr8_and_or(sd, PHY_EN, ~MASK_ENABLE_PHY, 0x0);
i2c_wr8(sd, PHY_CTL1, SET_PHY_AUTO_RST1_US(1600) |
SET_FREQ_RANGE_MODE_CYCLES(1));
i2c_wr8_and_or(sd, PHY_CTL2, ~MASK_PHY_AUTO_RSTn,
(pdata->hdmi_phy_auto_reset_tmds_detected ?
MASK_PHY_AUTO_RST2 : 0) |
(pdata->hdmi_phy_auto_reset_tmds_in_range ?
MASK_PHY_AUTO_RST3 : 0) |
(pdata->hdmi_phy_auto_reset_tmds_valid ?
MASK_PHY_AUTO_RST4 : 0));
i2c_wr8(sd, PHY_BIAS, 0x40);
i2c_wr8(sd, PHY_CSQ, SET_CSQ_CNT_LEVEL(0x0a));
i2c_wr8(sd, AVM_CTL, 45);
i2c_wr8_and_or(sd, HDMI_DET, ~MASK_HDMI_DET_V,
pdata->hdmi_detection_delay << 4);
i2c_wr8_and_or(sd, HV_RST, ~(MASK_H_PI_RST | MASK_V_PI_RST),
(pdata->hdmi_phy_auto_reset_hsync_out_of_range ?
MASK_H_PI_RST : 0) |
(pdata->hdmi_phy_auto_reset_vsync_out_of_range ?
MASK_V_PI_RST : 0));
i2c_wr8_and_or(sd, PHY_EN, ~MASK_ENABLE_PHY, MASK_ENABLE_PHY);
}
static void tc358743_set_hdmi_audio(struct v4l2_subdev *sd)
{
struct tc358743_state *state = to_state(sd);
/* Default settings from REF_02, sheet "Source HDMI" */
i2c_wr8(sd, FORCE_MUTE, 0x00);
i2c_wr8(sd, AUTO_CMD0, MASK_AUTO_MUTE7 | MASK_AUTO_MUTE6 |
MASK_AUTO_MUTE5 | MASK_AUTO_MUTE4 |
MASK_AUTO_MUTE1 | MASK_AUTO_MUTE0);
i2c_wr8(sd, AUTO_CMD1, MASK_AUTO_MUTE9);
i2c_wr8(sd, AUTO_CMD2, MASK_AUTO_PLAY3 | MASK_AUTO_PLAY2);
i2c_wr8(sd, BUFINIT_START, SET_BUFINIT_START_MS(500));
i2c_wr8(sd, FS_MUTE, 0x00);
i2c_wr8(sd, FS_IMODE, MASK_NLPCM_SMODE | MASK_FS_SMODE);
i2c_wr8(sd, ACR_MODE, MASK_CTS_MODE);
i2c_wr8(sd, ACR_MDF0, MASK_ACR_L2MDF_1976_PPM | MASK_ACR_L1MDF_976_PPM);
i2c_wr8(sd, ACR_MDF1, MASK_ACR_L3MDF_3906_PPM);
i2c_wr8(sd, SDO_MODE1, MASK_SDO_FMT_I2S);
i2c_wr8(sd, DIV_MODE, SET_DIV_DLY_MS(100));
mutex_lock(&state->confctl_mutex);
i2c_wr16_and_or(sd, CONFCTL, 0xffff, MASK_AUDCHNUM_2 |
MASK_AUDOUTSEL_I2S | MASK_AUTOINDEX);
mutex_unlock(&state->confctl_mutex);
}
static void tc358743_set_hdmi_info_frame_mode(struct v4l2_subdev *sd)
{
/* Default settings from REF_02, sheet "Source HDMI" */
i2c_wr8(sd, PK_INT_MODE, MASK_ISRC2_INT_MODE | MASK_ISRC_INT_MODE |
MASK_ACP_INT_MODE | MASK_VS_INT_MODE |
MASK_SPD_INT_MODE | MASK_MS_INT_MODE |
MASK_AUD_INT_MODE | MASK_AVI_INT_MODE);
i2c_wr8(sd, NO_PKT_LIMIT, 0x2c);
i2c_wr8(sd, NO_PKT_CLR, 0x53);
i2c_wr8(sd, ERR_PK_LIMIT, 0x01);
i2c_wr8(sd, NO_PKT_LIMIT2, 0x30);
i2c_wr8(sd, NO_GDB_LIMIT, 0x10);
}
static void tc358743_initial_setup(struct v4l2_subdev *sd)
{
struct tc358743_state *state = to_state(sd);
struct tc358743_platform_data *pdata = &state->pdata;
/*
* IR is not supported by this driver.
* CEC is only enabled if needed.
*/
i2c_wr16_and_or(sd, SYSCTL, ~(MASK_IRRST | MASK_CECRST),
(MASK_IRRST | MASK_CECRST));
tc358743_reset(sd, MASK_CTXRST | MASK_HDMIRST);
#ifdef CONFIG_VIDEO_TC358743_CEC
tc358743_reset(sd, MASK_CECRST);
#endif
tc358743_sleep_mode(sd, false);
i2c_wr16(sd, FIFOCTL, pdata->fifo_level);
tc358743_set_ref_clk(sd);
i2c_wr8_and_or(sd, DDC_CTL, ~MASK_DDC5V_MODE,
pdata->ddc5v_delay & MASK_DDC5V_MODE);
i2c_wr8_and_or(sd, EDID_MODE, ~MASK_EDID_MODE, MASK_EDID_MODE_E_DDC);
tc358743_set_hdmi_phy(sd);
tc358743_set_hdmi_hdcp(sd, pdata->enable_hdcp);
tc358743_set_hdmi_audio(sd);
tc358743_set_hdmi_info_frame_mode(sd);
/* All CE and IT formats are detected as RGB full range in DVI mode */
i2c_wr8_and_or(sd, VI_MODE, ~MASK_RGB_DVI, 0);
i2c_wr8_and_or(sd, VOUT_SET2, ~MASK_VOUTCOLORMODE,
MASK_VOUTCOLORMODE_AUTO);
i2c_wr8(sd, VOUT_SET3, MASK_VOUT_EXTCNT);
}
/* --------------- CEC --------------- */
#ifdef CONFIG_VIDEO_TC358743_CEC
static int tc358743_cec_adap_enable(struct cec_adapter *adap, bool enable)
{
struct tc358743_state *state = adap->priv;
struct v4l2_subdev *sd = &state->sd;
i2c_wr32(sd, CECIMSK, enable ? MASK_CECTIM | MASK_CECRIM : 0);
i2c_wr32(sd, CECICLR, MASK_CECTICLR | MASK_CECRICLR);
i2c_wr32(sd, CECEN, enable);
if (enable)
i2c_wr32(sd, CECREN, MASK_CECREN);
return 0;
}
static int tc358743_cec_adap_monitor_all_enable(struct cec_adapter *adap,
bool enable)
{
struct tc358743_state *state = adap->priv;
struct v4l2_subdev *sd = &state->sd;
u32 reg;
reg = i2c_rd32(sd, CECRCTL1);
if (enable)
reg |= MASK_CECOTH;
else
reg &= ~MASK_CECOTH;
i2c_wr32(sd, CECRCTL1, reg);
return 0;
}
static int tc358743_cec_adap_log_addr(struct cec_adapter *adap, u8 log_addr)
{
struct tc358743_state *state = adap->priv;
struct v4l2_subdev *sd = &state->sd;
unsigned int la = 0;
if (log_addr != CEC_LOG_ADDR_INVALID) {
la = i2c_rd32(sd, CECADD);
la |= 1 << log_addr;
}
i2c_wr32(sd, CECADD, la);
return 0;
}
static int tc358743_cec_adap_transmit(struct cec_adapter *adap, u8 attempts,
u32 signal_free_time, struct cec_msg *msg)
{
struct tc358743_state *state = adap->priv;
struct v4l2_subdev *sd = &state->sd;
unsigned int i;
i2c_wr32(sd, CECTCTL,
(cec_msg_is_broadcast(msg) ? MASK_CECBRD : 0) |
(signal_free_time - 1));
for (i = 0; i < msg->len; i++)
i2c_wr32(sd, CECTBUF1 + i * 4,
msg->msg[i] | ((i == msg->len - 1) ? MASK_CECTEOM : 0));
i2c_wr32(sd, CECTEN, MASK_CECTEN);
return 0;
}
static const struct cec_adap_ops tc358743_cec_adap_ops = {
.adap_enable = tc358743_cec_adap_enable,
.adap_log_addr = tc358743_cec_adap_log_addr,
.adap_transmit = tc358743_cec_adap_transmit,
.adap_monitor_all_enable = tc358743_cec_adap_monitor_all_enable,
};
static void tc358743_cec_isr(struct v4l2_subdev *sd, u16 intstatus,
bool *handled)
{
struct tc358743_state *state = to_state(sd);
unsigned int cec_rxint, cec_txint;
unsigned int clr = 0;
cec_rxint = i2c_rd32(sd, CECRSTAT);
cec_txint = i2c_rd32(sd, CECTSTAT);
if (intstatus & MASK_CEC_RINT)
clr |= MASK_CECRICLR;
if (intstatus & MASK_CEC_TINT)
clr |= MASK_CECTICLR;
i2c_wr32(sd, CECICLR, clr);
if ((intstatus & MASK_CEC_TINT) && cec_txint) {
if (cec_txint & MASK_CECTIEND)
cec_transmit_attempt_done(state->cec_adap,
CEC_TX_STATUS_OK);
else if (cec_txint & MASK_CECTIAL)
cec_transmit_attempt_done(state->cec_adap,
CEC_TX_STATUS_ARB_LOST);
else if (cec_txint & MASK_CECTIACK)
cec_transmit_attempt_done(state->cec_adap,
CEC_TX_STATUS_NACK);
else if (cec_txint & MASK_CECTIUR) {
/*
* Not sure when this bit is set. Treat
* it as an error for now.
*/
cec_transmit_attempt_done(state->cec_adap,
CEC_TX_STATUS_ERROR);
}
*handled = true;
}
if ((intstatus & MASK_CEC_RINT) &&
(cec_rxint & MASK_CECRIEND)) {
struct cec_msg msg = {};
unsigned int i;
unsigned int v;
v = i2c_rd32(sd, CECRCTR);
msg.len = v & 0x1f;
for (i = 0; i < msg.len; i++) {
v = i2c_rd32(sd, CECRBUF1 + i * 4);
msg.msg[i] = v & 0xff;
}
cec_received_msg(state->cec_adap, &msg);
*handled = true;
}
i2c_wr16(sd, INTSTATUS,
intstatus & (MASK_CEC_RINT | MASK_CEC_TINT));
}
#endif
/* --------------- IRQ --------------- */
static void tc358743_format_change(struct v4l2_subdev *sd)
{
struct tc358743_state *state = to_state(sd);
struct v4l2_dv_timings timings;
const struct v4l2_event tc358743_ev_fmt = {
.type = V4L2_EVENT_SOURCE_CHANGE,
.u.src_change.changes = V4L2_EVENT_SRC_CH_RESOLUTION,
};
if (tc358743_get_detected_timings(sd, &timings)) {
enable_stream(sd, false);
v4l2_dbg(1, debug, sd, "%s: No signal\n",
__func__);
} else {
if (!v4l2_match_dv_timings(&state->timings, &timings, 0, false))
enable_stream(sd, false);
if (debug)
v4l2_print_dv_timings(sd->name,
"tc358743_format_change: New format: ",
&timings, false);
}
if (sd->devnode)
v4l2_subdev_notify_event(sd, &tc358743_ev_fmt);
}
static void tc358743_init_interrupts(struct v4l2_subdev *sd)
{
u16 i;
/* clear interrupt status registers */
for (i = SYS_INT; i <= KEY_INT; i++)
i2c_wr8(sd, i, 0xff);
i2c_wr16(sd, INTSTATUS, 0xffff);
}
static void tc358743_enable_interrupts(struct v4l2_subdev *sd,
bool cable_connected)
{
v4l2_dbg(2, debug, sd, "%s: cable connected = %d\n", __func__,
cable_connected);
if (cable_connected) {
i2c_wr8(sd, SYS_INTM, ~(MASK_M_DDC | MASK_M_DVI_DET |
MASK_M_HDMI_DET) & 0xff);
i2c_wr8(sd, CLK_INTM, ~MASK_M_IN_DE_CHG);
i2c_wr8(sd, CBIT_INTM, ~(MASK_M_CBIT_FS | MASK_M_AF_LOCK |
MASK_M_AF_UNLOCK) & 0xff);
i2c_wr8(sd, AUDIO_INTM, ~MASK_M_BUFINIT_END);
i2c_wr8(sd, MISC_INTM, ~MASK_M_SYNC_CHG);
} else {
i2c_wr8(sd, SYS_INTM, ~MASK_M_DDC & 0xff);
i2c_wr8(sd, CLK_INTM, 0xff);
i2c_wr8(sd, CBIT_INTM, 0xff);
i2c_wr8(sd, AUDIO_INTM, 0xff);
i2c_wr8(sd, MISC_INTM, 0xff);
}
}
static void tc358743_hdmi_audio_int_handler(struct v4l2_subdev *sd,
bool *handled)
{
u8 audio_int_mask = i2c_rd8(sd, AUDIO_INTM);
u8 audio_int = i2c_rd8(sd, AUDIO_INT) & ~audio_int_mask;
i2c_wr8(sd, AUDIO_INT, audio_int);
v4l2_dbg(3, debug, sd, "%s: AUDIO_INT = 0x%02x\n", __func__, audio_int);
tc358743_s_ctrl_audio_sampling_rate(sd);
tc358743_s_ctrl_audio_present(sd);
}
static void tc358743_csi_err_int_handler(struct v4l2_subdev *sd, bool *handled)
{
v4l2_err(sd, "%s: CSI_ERR = 0x%x\n", __func__, i2c_rd32(sd, CSI_ERR));
i2c_wr32(sd, CSI_INT_CLR, MASK_ICRER);
}
static void tc358743_hdmi_misc_int_handler(struct v4l2_subdev *sd,
bool *handled)
{
u8 misc_int_mask = i2c_rd8(sd, MISC_INTM);
u8 misc_int = i2c_rd8(sd, MISC_INT) & ~misc_int_mask;
i2c_wr8(sd, MISC_INT, misc_int);
v4l2_dbg(3, debug, sd, "%s: MISC_INT = 0x%02x\n", __func__, misc_int);
if (misc_int & MASK_I_SYNC_CHG) {
/* Reset the HDMI PHY to try to trigger proper lock on the
* incoming video format. Erase BKSV to prevent that old keys
* are used when a new source is connected. */
if (no_sync(sd) || no_signal(sd)) {
tc358743_reset_phy(sd);
tc358743_erase_bksv(sd);
}
tc358743_format_change(sd);
misc_int &= ~MASK_I_SYNC_CHG;
if (handled)
*handled = true;
}
if (misc_int) {
v4l2_err(sd, "%s: Unhandled MISC_INT interrupts: 0x%02x\n",
__func__, misc_int);
}
}
static void tc358743_hdmi_cbit_int_handler(struct v4l2_subdev *sd,
bool *handled)
{
u8 cbit_int_mask = i2c_rd8(sd, CBIT_INTM);
u8 cbit_int = i2c_rd8(sd, CBIT_INT) & ~cbit_int_mask;
i2c_wr8(sd, CBIT_INT, cbit_int);
v4l2_dbg(3, debug, sd, "%s: CBIT_INT = 0x%02x\n", __func__, cbit_int);
if (cbit_int & MASK_I_CBIT_FS) {
v4l2_dbg(1, debug, sd, "%s: Audio sample rate changed\n",
__func__);
tc358743_s_ctrl_audio_sampling_rate(sd);
cbit_int &= ~MASK_I_CBIT_FS;
if (handled)
*handled = true;
}
if (cbit_int & (MASK_I_AF_LOCK | MASK_I_AF_UNLOCK)) {
v4l2_dbg(1, debug, sd, "%s: Audio present changed\n",
__func__);
tc358743_s_ctrl_audio_present(sd);
cbit_int &= ~(MASK_I_AF_LOCK | MASK_I_AF_UNLOCK);
if (handled)
*handled = true;
}
if (cbit_int) {
v4l2_err(sd, "%s: Unhandled CBIT_INT interrupts: 0x%02x\n",
__func__, cbit_int);
}
}
static void tc358743_hdmi_clk_int_handler(struct v4l2_subdev *sd, bool *handled)
{
u8 clk_int_mask = i2c_rd8(sd, CLK_INTM);
u8 clk_int = i2c_rd8(sd, CLK_INT) & ~clk_int_mask;
/* Bit 7 and bit 6 are set even when they are masked */
i2c_wr8(sd, CLK_INT, clk_int | 0x80 | MASK_I_OUT_H_CHG);
v4l2_dbg(3, debug, sd, "%s: CLK_INT = 0x%02x\n", __func__, clk_int);
if (clk_int & (MASK_I_IN_DE_CHG)) {
v4l2_dbg(1, debug, sd, "%s: DE size or position has changed\n",
__func__);
/* If the source switch to a new resolution with the same pixel
* frequency as the existing (e.g. 1080p25 -> 720p50), the
* I_SYNC_CHG interrupt is not always triggered, while the
* I_IN_DE_CHG interrupt seems to work fine. Format change
* notifications are only sent when the signal is stable to
* reduce the number of notifications. */
if (!no_signal(sd) && !no_sync(sd))
tc358743_format_change(sd);
clk_int &= ~(MASK_I_IN_DE_CHG);
if (handled)
*handled = true;
}
if (clk_int) {
v4l2_err(sd, "%s: Unhandled CLK_INT interrupts: 0x%02x\n",
__func__, clk_int);
}
}
static void tc358743_hdmi_sys_int_handler(struct v4l2_subdev *sd, bool *handled)
{
struct tc358743_state *state = to_state(sd);
u8 sys_int_mask = i2c_rd8(sd, SYS_INTM);
u8 sys_int = i2c_rd8(sd, SYS_INT) & ~sys_int_mask;
i2c_wr8(sd, SYS_INT, sys_int);
v4l2_dbg(3, debug, sd, "%s: SYS_INT = 0x%02x\n", __func__, sys_int);
if (sys_int & MASK_I_DDC) {
bool tx_5v = tx_5v_power_present(sd);
v4l2_dbg(1, debug, sd, "%s: Tx 5V power present: %s\n",
__func__, tx_5v ? "yes" : "no");
if (tx_5v) {
tc358743_enable_edid(sd);
} else {
tc358743_enable_interrupts(sd, false);
tc358743_disable_edid(sd);
memset(&state->timings, 0, sizeof(state->timings));
tc358743_erase_bksv(sd);
tc358743_update_controls(sd);
}
sys_int &= ~MASK_I_DDC;
if (handled)
*handled = true;
}
if (sys_int & MASK_I_DVI) {
v4l2_dbg(1, debug, sd, "%s: HDMI->DVI change detected\n",
__func__);
/* Reset the HDMI PHY to try to trigger proper lock on the
* incoming video format. Erase BKSV to prevent that old keys
* are used when a new source is connected. */
if (no_sync(sd) || no_signal(sd)) {
tc358743_reset_phy(sd);
tc358743_erase_bksv(sd);
}
sys_int &= ~MASK_I_DVI;
if (handled)
*handled = true;
}
if (sys_int & MASK_I_HDMI) {
v4l2_dbg(1, debug, sd, "%s: DVI->HDMI change detected\n",
__func__);
/* Register is reset in DVI mode (REF_01, c. 6.6.41) */
i2c_wr8(sd, ANA_CTL, MASK_APPL_PCSX_NORMAL | MASK_ANALOG_ON);
sys_int &= ~MASK_I_HDMI;
if (handled)
*handled = true;
}
if (sys_int) {
v4l2_err(sd, "%s: Unhandled SYS_INT interrupts: 0x%02x\n",
__func__, sys_int);
}
}
/* --------------- CORE OPS --------------- */
static int tc358743_log_status(struct v4l2_subdev *sd)
{
struct tc358743_state *state = to_state(sd);
struct v4l2_dv_timings timings;
uint8_t hdmi_sys_status = i2c_rd8(sd, SYS_STATUS);
uint16_t sysctl = i2c_rd16(sd, SYSCTL);
u8 vi_status3 = i2c_rd8(sd, VI_STATUS3);
const int deep_color_mode[4] = { 8, 10, 12, 16 };
static const char * const input_color_space[] = {
"RGB", "YCbCr 601", "opRGB", "YCbCr 709", "NA (4)",
"xvYCC 601", "NA(6)", "xvYCC 709", "NA(8)", "sYCC601",
"NA(10)", "NA(11)", "NA(12)", "opYCC 601"};
v4l2_info(sd, "-----Chip status-----\n");
v4l2_info(sd, "Chip ID: 0x%02x\n",
(i2c_rd16(sd, CHIPID) & MASK_CHIPID) >> 8);
v4l2_info(sd, "Chip revision: 0x%02x\n",
i2c_rd16(sd, CHIPID) & MASK_REVID);
v4l2_info(sd, "Reset: IR: %d, CEC: %d, CSI TX: %d, HDMI: %d\n",
!!(sysctl & MASK_IRRST),
!!(sysctl & MASK_CECRST),
!!(sysctl & MASK_CTXRST),
!!(sysctl & MASK_HDMIRST));
v4l2_info(sd, "Sleep mode: %s\n", sysctl & MASK_SLEEP ? "on" : "off");
v4l2_info(sd, "Cable detected (+5V power): %s\n",
hdmi_sys_status & MASK_S_DDC5V ? "yes" : "no");
v4l2_info(sd, "DDC lines enabled: %s\n",
(i2c_rd8(sd, EDID_MODE) & MASK_EDID_MODE_E_DDC) ?
"yes" : "no");
v4l2_info(sd, "Hotplug enabled: %s\n",
(i2c_rd8(sd, HPD_CTL) & MASK_HPD_OUT0) ?
"yes" : "no");
v4l2_info(sd, "CEC enabled: %s\n",
(i2c_rd16(sd, CECEN) & MASK_CECEN) ? "yes" : "no");
v4l2_info(sd, "-----Signal status-----\n");
v4l2_info(sd, "TMDS signal detected: %s\n",
hdmi_sys_status & MASK_S_TMDS ? "yes" : "no");
v4l2_info(sd, "Stable sync signal: %s\n",
hdmi_sys_status & MASK_S_SYNC ? "yes" : "no");
v4l2_info(sd, "PHY PLL locked: %s\n",
hdmi_sys_status & MASK_S_PHY_PLL ? "yes" : "no");
v4l2_info(sd, "PHY DE detected: %s\n",
hdmi_sys_status & MASK_S_PHY_SCDT ? "yes" : "no");
if (tc358743_get_detected_timings(sd, &timings)) {
v4l2_info(sd, "No video detected\n");
} else {
v4l2_print_dv_timings(sd->name, "Detected format: ", &timings,
true);
}
v4l2_print_dv_timings(sd->name, "Configured format: ", &state->timings,
true);
v4l2_info(sd, "-----CSI-TX status-----\n");
v4l2_info(sd, "Lanes needed: %d\n",
tc358743_num_csi_lanes_needed(sd));
v4l2_info(sd, "Lanes in use: %d\n",
state->csi_lanes_in_use);
v4l2_info(sd, "Waiting for particular sync signal: %s\n",
(i2c_rd16(sd, CSI_STATUS) & MASK_S_WSYNC) ?
"yes" : "no");
v4l2_info(sd, "Transmit mode: %s\n",
(i2c_rd16(sd, CSI_STATUS) & MASK_S_TXACT) ?
"yes" : "no");
v4l2_info(sd, "Receive mode: %s\n",
(i2c_rd16(sd, CSI_STATUS) & MASK_S_RXACT) ?
"yes" : "no");
v4l2_info(sd, "Stopped: %s\n",
(i2c_rd16(sd, CSI_STATUS) & MASK_S_HLT) ?
"yes" : "no");
v4l2_info(sd, "Color space: %s\n",
state->mbus_fmt_code == MEDIA_BUS_FMT_UYVY8_1X16 ?
"YCbCr 422 16-bit" :
state->mbus_fmt_code == MEDIA_BUS_FMT_RGB888_1X24 ?
"RGB 888 24-bit" : "Unsupported");
v4l2_info(sd, "-----%s status-----\n", is_hdmi(sd) ? "HDMI" : "DVI-D");
v4l2_info(sd, "HDCP encrypted content: %s\n",
hdmi_sys_status & MASK_S_HDCP ? "yes" : "no");
v4l2_info(sd, "Input color space: %s %s range\n",
input_color_space[(vi_status3 & MASK_S_V_COLOR) >> 1],
(vi_status3 & MASK_LIMITED) ? "limited" : "full");
if (!is_hdmi(sd))
return 0;
v4l2_info(sd, "AV Mute: %s\n", hdmi_sys_status & MASK_S_AVMUTE ? "on" :
"off");
v4l2_info(sd, "Deep color mode: %d-bits per channel\n",
deep_color_mode[(i2c_rd8(sd, VI_STATUS1) &
MASK_S_DEEPCOLOR) >> 2]);
print_avi_infoframe(sd);
return 0;
}
#ifdef CONFIG_VIDEO_ADV_DEBUG
static void tc358743_print_register_map(struct v4l2_subdev *sd)
{
v4l2_info(sd, "0x0000-0x00FF: Global Control Register\n");
v4l2_info(sd, "0x0100-0x01FF: CSI2-TX PHY Register\n");
v4l2_info(sd, "0x0200-0x03FF: CSI2-TX PPI Register\n");
v4l2_info(sd, "0x0400-0x05FF: Reserved\n");
v4l2_info(sd, "0x0600-0x06FF: CEC Register\n");
v4l2_info(sd, "0x0700-0x84FF: Reserved\n");
v4l2_info(sd, "0x8500-0x85FF: HDMIRX System Control Register\n");
v4l2_info(sd, "0x8600-0x86FF: HDMIRX Audio Control Register\n");
v4l2_info(sd, "0x8700-0x87FF: HDMIRX InfoFrame packet data Register\n");
v4l2_info(sd, "0x8800-0x88FF: HDMIRX HDCP Port Register\n");
v4l2_info(sd, "0x8900-0x89FF: HDMIRX Video Output Port & 3D Register\n");
v4l2_info(sd, "0x8A00-0x8BFF: Reserved\n");
v4l2_info(sd, "0x8C00-0x8FFF: HDMIRX EDID-RAM (1024bytes)\n");
v4l2_info(sd, "0x9000-0x90FF: HDMIRX GBD Extraction Control\n");
v4l2_info(sd, "0x9100-0x92FF: HDMIRX GBD RAM read\n");
v4l2_info(sd, "0x9300- : Reserved\n");
}
static int tc358743_get_reg_size(u16 address)
{
/* REF_01 p. 66-72 */
if (address <= 0x00ff)
return 2;
else if ((address >= 0x0100) && (address <= 0x06FF))
return 4;
else if ((address >= 0x0700) && (address <= 0x84ff))
return 2;
else
return 1;
}
static int tc358743_g_register(struct v4l2_subdev *sd,
struct v4l2_dbg_register *reg)
{
if (reg->reg > 0xffff) {
tc358743_print_register_map(sd);
return -EINVAL;
}
reg->size = tc358743_get_reg_size(reg->reg);
reg->val = i2c_rdreg(sd, reg->reg, reg->size);
return 0;
}
static int tc358743_s_register(struct v4l2_subdev *sd,
const struct v4l2_dbg_register *reg)
{
if (reg->reg > 0xffff) {
tc358743_print_register_map(sd);
return -EINVAL;
}
/* It should not be possible for the user to enable HDCP with a simple
* v4l2-dbg command.
*
* DO NOT REMOVE THIS unless all other issues with HDCP have been
* resolved.
*/
if (reg->reg == HDCP_MODE ||
reg->reg == HDCP_REG1 ||
reg->reg == HDCP_REG2 ||
reg->reg == HDCP_REG3 ||
reg->reg == BCAPS)
return 0;
i2c_wrreg(sd, (u16)reg->reg, reg->val,
tc358743_get_reg_size(reg->reg));
return 0;
}
#endif
static int tc358743_isr(struct v4l2_subdev *sd, u32 status, bool *handled)
{
u16 intstatus = i2c_rd16(sd, INTSTATUS);
v4l2_dbg(1, debug, sd, "%s: IntStatus = 0x%04x\n", __func__, intstatus);
if (intstatus & MASK_HDMI_INT) {
u8 hdmi_int0 = i2c_rd8(sd, HDMI_INT0);
u8 hdmi_int1 = i2c_rd8(sd, HDMI_INT1);
if (hdmi_int0 & MASK_I_MISC)
tc358743_hdmi_misc_int_handler(sd, handled);
if (hdmi_int1 & MASK_I_CBIT)
tc358743_hdmi_cbit_int_handler(sd, handled);
if (hdmi_int1 & MASK_I_CLK)
tc358743_hdmi_clk_int_handler(sd, handled);
if (hdmi_int1 & MASK_I_SYS)
tc358743_hdmi_sys_int_handler(sd, handled);
if (hdmi_int1 & MASK_I_AUD)
tc358743_hdmi_audio_int_handler(sd, handled);
i2c_wr16(sd, INTSTATUS, MASK_HDMI_INT);
intstatus &= ~MASK_HDMI_INT;
}
#ifdef CONFIG_VIDEO_TC358743_CEC
if (intstatus & (MASK_CEC_RINT | MASK_CEC_TINT)) {
tc358743_cec_isr(sd, intstatus, handled);
i2c_wr16(sd, INTSTATUS,
intstatus & (MASK_CEC_RINT | MASK_CEC_TINT));
intstatus &= ~(MASK_CEC_RINT | MASK_CEC_TINT);
}
#endif
if (intstatus & MASK_CSI_INT) {
u32 csi_int = i2c_rd32(sd, CSI_INT);
if (csi_int & MASK_INTER)
tc358743_csi_err_int_handler(sd, handled);
i2c_wr16(sd, INTSTATUS, MASK_CSI_INT);
}
intstatus = i2c_rd16(sd, INTSTATUS);
if (intstatus) {
v4l2_dbg(1, debug, sd,
"%s: Unhandled IntStatus interrupts: 0x%02x\n",
__func__, intstatus);
}
return 0;
}
static irqreturn_t tc358743_irq_handler(int irq, void *dev_id)
{
struct tc358743_state *state = dev_id;
bool handled = false;
tc358743_isr(&state->sd, 0, &handled);
return handled ? IRQ_HANDLED : IRQ_NONE;
}
static void tc358743_irq_poll_timer(struct timer_list *t)
{
struct tc358743_state *state = from_timer(state, t, timer);
unsigned int msecs;
schedule_work(&state->work_i2c_poll);
/*
* If CEC is present, then we need to poll more frequently,
* otherwise we will miss CEC messages.
*/
msecs = state->cec_adap ? POLL_INTERVAL_CEC_MS : POLL_INTERVAL_MS;
mod_timer(&state->timer, jiffies + msecs_to_jiffies(msecs));
}
static void tc358743_work_i2c_poll(struct work_struct *work)
{
struct tc358743_state *state = container_of(work,
struct tc358743_state, work_i2c_poll);
bool handled;
tc358743_isr(&state->sd, 0, &handled);
}
static int tc358743_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
struct v4l2_event_subscription *sub)
{
switch (sub->type) {
case V4L2_EVENT_SOURCE_CHANGE:
return v4l2_src_change_event_subdev_subscribe(sd, fh, sub);
case V4L2_EVENT_CTRL:
return v4l2_ctrl_subdev_subscribe_event(sd, fh, sub);
default:
return -EINVAL;
}
}
/* --------------- VIDEO OPS --------------- */
static int tc358743_g_input_status(struct v4l2_subdev *sd, u32 *status)
{
*status = 0;
*status |= no_signal(sd) ? V4L2_IN_ST_NO_SIGNAL : 0;
*status |= no_sync(sd) ? V4L2_IN_ST_NO_SYNC : 0;
v4l2_dbg(1, debug, sd, "%s: status = 0x%x\n", __func__, *status);
return 0;
}
static int tc358743_s_dv_timings(struct v4l2_subdev *sd,
struct v4l2_dv_timings *timings)
{
struct tc358743_state *state = to_state(sd);
if (!timings)
return -EINVAL;
if (debug)
v4l2_print_dv_timings(sd->name, "tc358743_s_dv_timings: ",
timings, false);
if (v4l2_match_dv_timings(&state->timings, timings, 0, false)) {
v4l2_dbg(1, debug, sd, "%s: no change\n", __func__);
return 0;
}
if (!v4l2_valid_dv_timings(timings,
&tc358743_timings_cap, NULL, NULL)) {
v4l2_dbg(1, debug, sd, "%s: timings out of range\n", __func__);
return -ERANGE;
}
state->timings = *timings;
enable_stream(sd, false);
tc358743_set_pll(sd);
tc358743_set_csi(sd);
return 0;
}
static int tc358743_g_dv_timings(struct v4l2_subdev *sd,
struct v4l2_dv_timings *timings)
{
struct tc358743_state *state = to_state(sd);
*timings = state->timings;
return 0;
}
static int tc358743_enum_dv_timings(struct v4l2_subdev *sd,
struct v4l2_enum_dv_timings *timings)
{
if (timings->pad != 0)
return -EINVAL;
return v4l2_enum_dv_timings_cap(timings,
&tc358743_timings_cap, NULL, NULL);
}
static int tc358743_query_dv_timings(struct v4l2_subdev *sd,
struct v4l2_dv_timings *timings)
{
int ret;
ret = tc358743_get_detected_timings(sd, timings);
if (ret)
return ret;
if (debug)
v4l2_print_dv_timings(sd->name, "tc358743_query_dv_timings: ",
timings, false);
if (!v4l2_valid_dv_timings(timings,
&tc358743_timings_cap, NULL, NULL)) {
v4l2_dbg(1, debug, sd, "%s: timings out of range\n", __func__);
return -ERANGE;
}
return 0;
}
static int tc358743_dv_timings_cap(struct v4l2_subdev *sd,
struct v4l2_dv_timings_cap *cap)
{
if (cap->pad != 0)
return -EINVAL;
*cap = tc358743_timings_cap;
return 0;
}
static int tc358743_get_mbus_config(struct v4l2_subdev *sd,
unsigned int pad,
struct v4l2_mbus_config *cfg)
{
struct tc358743_state *state = to_state(sd);
cfg->type = V4L2_MBUS_CSI2_DPHY;
/* Support for non-continuous CSI-2 clock is missing in the driver */
cfg->flags = V4L2_MBUS_CSI2_CONTINUOUS_CLOCK;
switch (state->csi_lanes_in_use) {
case 1:
cfg->flags |= V4L2_MBUS_CSI2_1_LANE;
break;
case 2:
cfg->flags |= V4L2_MBUS_CSI2_2_LANE;
break;
case 3:
cfg->flags |= V4L2_MBUS_CSI2_3_LANE;
break;
case 4:
cfg->flags |= V4L2_MBUS_CSI2_4_LANE;
break;
default:
return -EINVAL;
}
return 0;
}
static int tc358743_s_stream(struct v4l2_subdev *sd, int enable)
{
enable_stream(sd, enable);
if (!enable) {
/* Put all lanes in LP-11 state (STOPSTATE) */
tc358743_set_csi(sd);
}
return 0;
}
/* --------------- PAD OPS --------------- */
static int tc358743_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_mbus_code_enum *code)
{
switch (code->index) {
case 0:
code->code = MEDIA_BUS_FMT_RGB888_1X24;
break;
case 1:
code->code = MEDIA_BUS_FMT_UYVY8_1X16;
break;
default:
return -EINVAL;
}
return 0;
}
static int tc358743_get_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_format *format)
{
struct tc358743_state *state = to_state(sd);
u8 vi_rep = i2c_rd8(sd, VI_REP);
if (format->pad != 0)
return -EINVAL;
format->format.code = state->mbus_fmt_code;
format->format.width = state->timings.bt.width;
format->format.height = state->timings.bt.height;
format->format.field = V4L2_FIELD_NONE;
switch (vi_rep & MASK_VOUT_COLOR_SEL) {
case MASK_VOUT_COLOR_RGB_FULL:
case MASK_VOUT_COLOR_RGB_LIMITED:
format->format.colorspace = V4L2_COLORSPACE_SRGB;
break;
case MASK_VOUT_COLOR_601_YCBCR_LIMITED:
case MASK_VOUT_COLOR_601_YCBCR_FULL:
format->format.colorspace = V4L2_COLORSPACE_SMPTE170M;
break;
case MASK_VOUT_COLOR_709_YCBCR_FULL:
case MASK_VOUT_COLOR_709_YCBCR_LIMITED:
format->format.colorspace = V4L2_COLORSPACE_REC709;
break;
default:
format->format.colorspace = 0;
break;
}
return 0;
}
static int tc358743_set_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_format *format)
{
struct tc358743_state *state = to_state(sd);
u32 code = format->format.code; /* is overwritten by get_fmt */
int ret = tc358743_get_fmt(sd, cfg, format);
format->format.code = code;
if (ret)
return ret;
switch (code) {
case MEDIA_BUS_FMT_RGB888_1X24:
case MEDIA_BUS_FMT_UYVY8_1X16:
break;
default:
return -EINVAL;
}
if (format->which == V4L2_SUBDEV_FORMAT_TRY)
return 0;
state->mbus_fmt_code = format->format.code;
enable_stream(sd, false);
tc358743_set_pll(sd);
tc358743_set_csi(sd);
tc358743_set_csi_color_space(sd);
return 0;
}
static int tc358743_g_edid(struct v4l2_subdev *sd,
struct v4l2_subdev_edid *edid)
{
struct tc358743_state *state = to_state(sd);
memset(edid->reserved, 0, sizeof(edid->reserved));
if (edid->pad != 0)
return -EINVAL;
if (edid->start_block == 0 && edid->blocks == 0) {
edid->blocks = state->edid_blocks_written;
return 0;
}
if (state->edid_blocks_written == 0)
return -ENODATA;
if (edid->start_block >= state->edid_blocks_written ||
edid->blocks == 0)
return -EINVAL;
if (edid->start_block + edid->blocks > state->edid_blocks_written)
edid->blocks = state->edid_blocks_written - edid->start_block;
i2c_rd(sd, EDID_RAM + (edid->start_block * EDID_BLOCK_SIZE), edid->edid,
edid->blocks * EDID_BLOCK_SIZE);
return 0;
}
static int tc358743_s_edid(struct v4l2_subdev *sd,
struct v4l2_subdev_edid *edid)
{
struct tc358743_state *state = to_state(sd);
u16 edid_len = edid->blocks * EDID_BLOCK_SIZE;
u16 pa;
int err;
int i;
v4l2_dbg(2, debug, sd, "%s, pad %d, start block %d, blocks %d\n",
__func__, edid->pad, edid->start_block, edid->blocks);
memset(edid->reserved, 0, sizeof(edid->reserved));
if (edid->pad != 0)
return -EINVAL;
if (edid->start_block != 0)
return -EINVAL;
if (edid->blocks > EDID_NUM_BLOCKS_MAX) {
edid->blocks = EDID_NUM_BLOCKS_MAX;
return -E2BIG;
}
pa = cec_get_edid_phys_addr(edid->edid, edid->blocks * 128, NULL);
err = v4l2_phys_addr_validate(pa, &pa, NULL);
if (err)
return err;
cec_phys_addr_invalidate(state->cec_adap);
tc358743_disable_edid(sd);
i2c_wr8(sd, EDID_LEN1, edid_len & 0xff);
i2c_wr8(sd, EDID_LEN2, edid_len >> 8);
if (edid->blocks == 0) {
state->edid_blocks_written = 0;
return 0;
}
for (i = 0; i < edid_len; i += EDID_BLOCK_SIZE)
i2c_wr(sd, EDID_RAM + i, edid->edid + i, EDID_BLOCK_SIZE);
state->edid_blocks_written = edid->blocks;
cec_s_phys_addr(state->cec_adap, pa, false);
if (tx_5v_power_present(sd))
tc358743_enable_edid(sd);
return 0;
}
/* -------------------------------------------------------------------------- */
static const struct v4l2_subdev_core_ops tc358743_core_ops = {
.log_status = tc358743_log_status,
#ifdef CONFIG_VIDEO_ADV_DEBUG
.g_register = tc358743_g_register,
.s_register = tc358743_s_register,
#endif
.interrupt_service_routine = tc358743_isr,
.subscribe_event = tc358743_subscribe_event,
.unsubscribe_event = v4l2_event_subdev_unsubscribe,
};
static const struct v4l2_subdev_video_ops tc358743_video_ops = {
.g_input_status = tc358743_g_input_status,
.s_dv_timings = tc358743_s_dv_timings,
.g_dv_timings = tc358743_g_dv_timings,
.query_dv_timings = tc358743_query_dv_timings,
.s_stream = tc358743_s_stream,
};
static const struct v4l2_subdev_pad_ops tc358743_pad_ops = {
.enum_mbus_code = tc358743_enum_mbus_code,
.set_fmt = tc358743_set_fmt,
.get_fmt = tc358743_get_fmt,
.get_edid = tc358743_g_edid,
.set_edid = tc358743_s_edid,
.enum_dv_timings = tc358743_enum_dv_timings,
.dv_timings_cap = tc358743_dv_timings_cap,
.get_mbus_config = tc358743_get_mbus_config,
};
static const struct v4l2_subdev_ops tc358743_ops = {
.core = &tc358743_core_ops,
.video = &tc358743_video_ops,
.pad = &tc358743_pad_ops,
};
/* --------------- CUSTOM CTRLS --------------- */
static const struct v4l2_ctrl_config tc358743_ctrl_audio_sampling_rate = {
.id = TC358743_CID_AUDIO_SAMPLING_RATE,
.name = "Audio sampling rate",
.type = V4L2_CTRL_TYPE_INTEGER,
.min = 0,
.max = 768000,
.step = 1,
.def = 0,
.flags = V4L2_CTRL_FLAG_READ_ONLY,
};
static const struct v4l2_ctrl_config tc358743_ctrl_audio_present = {
.id = TC358743_CID_AUDIO_PRESENT,
.name = "Audio present",
.type = V4L2_CTRL_TYPE_BOOLEAN,
.min = 0,
.max = 1,
.step = 1,
.def = 0,
.flags = V4L2_CTRL_FLAG_READ_ONLY,
};
/* --------------- PROBE / REMOVE --------------- */
#ifdef CONFIG_OF
static void tc358743_gpio_reset(struct tc358743_state *state)
{
usleep_range(5000, 10000);
gpiod_set_value(state->reset_gpio, 1);
usleep_range(1000, 2000);
gpiod_set_value(state->reset_gpio, 0);
msleep(20);
}
static int tc358743_probe_of(struct tc358743_state *state)
{
struct device *dev = &state->i2c_client->dev;
struct v4l2_fwnode_endpoint endpoint = { .bus_type = 0 };
struct device_node *ep;
struct clk *refclk;
u32 bps_pr_lane;
int ret;
refclk = devm_clk_get(dev, "refclk");
if (IS_ERR(refclk)) {
if (PTR_ERR(refclk) != -EPROBE_DEFER)
dev_err(dev, "failed to get refclk: %ld\n",
PTR_ERR(refclk));
return PTR_ERR(refclk);
}
ep = of_graph_get_next_endpoint(dev->of_node, NULL);
if (!ep) {
dev_err(dev, "missing endpoint node\n");
return -EINVAL;
}
ret = v4l2_fwnode_endpoint_alloc_parse(of_fwnode_handle(ep), &endpoint);
if (ret) {
dev_err(dev, "failed to parse endpoint\n");
goto put_node;
}
if (endpoint.bus_type != V4L2_MBUS_CSI2_DPHY ||
endpoint.bus.mipi_csi2.num_data_lanes == 0 ||
endpoint.nr_of_link_frequencies == 0) {
dev_err(dev, "missing CSI-2 properties in endpoint\n");
ret = -EINVAL;
goto free_endpoint;
}
if (endpoint.bus.mipi_csi2.num_data_lanes > 4) {
dev_err(dev, "invalid number of lanes\n");
ret = -EINVAL;
goto free_endpoint;
}
state->bus = endpoint.bus.mipi_csi2;
ret = clk_prepare_enable(refclk);
if (ret) {
dev_err(dev, "Failed! to enable clock\n");
goto free_endpoint;
}
state->pdata.refclk_hz = clk_get_rate(refclk);
state->pdata.ddc5v_delay = DDC5V_DELAY_100_MS;
state->pdata.enable_hdcp = false;
/* A FIFO level of 16 should be enough for 2-lane 720p60 at 594 MHz. */
state->pdata.fifo_level = 16;
/*
* The PLL input clock is obtained by dividing refclk by pll_prd.
* It must be between 6 MHz and 40 MHz, lower frequency is better.
*/
switch (state->pdata.refclk_hz) {
case 26000000:
case 27000000:
case 42000000:
state->pdata.pll_prd = state->pdata.refclk_hz / 6000000;
break;
default:
dev_err(dev, "unsupported refclk rate: %u Hz\n",
state->pdata.refclk_hz);
goto disable_clk;
}
/*
* The CSI bps per lane must be between 62.5 Mbps and 1 Gbps.
* The default is 594 Mbps for 4-lane 1080p60 or 2-lane 720p60.
*/
bps_pr_lane = 2 * endpoint.link_frequencies[0];
if (bps_pr_lane < 62500000U || bps_pr_lane > 1000000000U) {
dev_err(dev, "unsupported bps per lane: %u bps\n", bps_pr_lane);
goto disable_clk;
}
/* The CSI speed per lane is refclk / pll_prd * pll_fbd */
state->pdata.pll_fbd = bps_pr_lane /
state->pdata.refclk_hz * state->pdata.pll_prd;
/*
* FIXME: These timings are from REF_02 for 594 Mbps per lane (297 MHz
* link frequency). In principle it should be possible to calculate
* them based on link frequency and resolution.
*/
if (bps_pr_lane != 594000000U)
dev_warn(dev, "untested bps per lane: %u bps\n", bps_pr_lane);
state->pdata.lineinitcnt = 0xe80;
state->pdata.lptxtimecnt = 0x003;
/* tclk-preparecnt: 3, tclk-zerocnt: 20 */
state->pdata.tclk_headercnt = 0x1403;
state->pdata.tclk_trailcnt = 0x00;
/* ths-preparecnt: 3, ths-zerocnt: 1 */
state->pdata.ths_headercnt = 0x0103;
state->pdata.twakeup = 0x4882;
state->pdata.tclk_postcnt = 0x008;
state->pdata.ths_trailcnt = 0x2;
state->pdata.hstxvregcnt = 0;
state->reset_gpio = devm_gpiod_get_optional(dev, "reset",
GPIOD_OUT_LOW);
if (IS_ERR(state->reset_gpio)) {
dev_err(dev, "failed to get reset gpio\n");
ret = PTR_ERR(state->reset_gpio);
goto disable_clk;
}
if (state->reset_gpio)
tc358743_gpio_reset(state);
ret = 0;
goto free_endpoint;
disable_clk:
clk_disable_unprepare(refclk);
free_endpoint:
v4l2_fwnode_endpoint_free(&endpoint);
put_node:
of_node_put(ep);
return ret;
}
#else
static inline int tc358743_probe_of(struct tc358743_state *state)
{
return -ENODEV;
}
#endif
static int tc358743_probe(struct i2c_client *client)
{
static struct v4l2_dv_timings default_timing =
V4L2_DV_BT_CEA_640X480P59_94;
struct tc358743_state *state;
struct tc358743_platform_data *pdata = client->dev.platform_data;
struct v4l2_subdev *sd;
u16 irq_mask = MASK_HDMI_MSK | MASK_CSI_MSK;
int err;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -EIO;
v4l_dbg(1, debug, client, "chip found @ 0x%x (%s)\n",
client->addr << 1, client->adapter->name);
state = devm_kzalloc(&client->dev, sizeof(struct tc358743_state),
GFP_KERNEL);
if (!state)
return -ENOMEM;
state->i2c_client = client;
/* platform data */
if (pdata) {
state->pdata = *pdata;
state->bus.flags = V4L2_MBUS_CSI2_CONTINUOUS_CLOCK;
} else {
err = tc358743_probe_of(state);
if (err == -ENODEV)
v4l_err(client, "No platform data!\n");
if (err)
return err;
}
sd = &state->sd;
v4l2_i2c_subdev_init(sd, client, &tc358743_ops);
sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
/* i2c access */
if ((i2c_rd16(sd, CHIPID) & MASK_CHIPID) != 0) {
v4l2_info(sd, "not a TC358743 on address 0x%x\n",
client->addr << 1);
return -ENODEV;
}
/* control handlers */
v4l2_ctrl_handler_init(&state->hdl, 3);
state->detect_tx_5v_ctrl = v4l2_ctrl_new_std(&state->hdl, NULL,
V4L2_CID_DV_RX_POWER_PRESENT, 0, 1, 0, 0);
/* custom controls */
state->audio_sampling_rate_ctrl = v4l2_ctrl_new_custom(&state->hdl,
&tc358743_ctrl_audio_sampling_rate, NULL);
state->audio_present_ctrl = v4l2_ctrl_new_custom(&state->hdl,
&tc358743_ctrl_audio_present, NULL);
sd->ctrl_handler = &state->hdl;
if (state->hdl.error) {
err = state->hdl.error;
goto err_hdl;
}
if (tc358743_update_controls(sd)) {
err = -ENODEV;
goto err_hdl;
}
state->pad.flags = MEDIA_PAD_FL_SOURCE;
sd->entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
err = media_entity_pads_init(&sd->entity, 1, &state->pad);
if (err < 0)
goto err_hdl;
state->mbus_fmt_code = MEDIA_BUS_FMT_RGB888_1X24;
sd->dev = &client->dev;
err = v4l2_async_register_subdev(sd);
if (err < 0)
goto err_hdl;
mutex_init(&state->confctl_mutex);
INIT_DELAYED_WORK(&state->delayed_work_enable_hotplug,
tc358743_delayed_work_enable_hotplug);
#ifdef CONFIG_VIDEO_TC358743_CEC
state->cec_adap = cec_allocate_adapter(&tc358743_cec_adap_ops,
state, dev_name(&client->dev),
CEC_CAP_DEFAULTS | CEC_CAP_MONITOR_ALL, CEC_MAX_LOG_ADDRS);
if (IS_ERR(state->cec_adap)) {
err = PTR_ERR(state->cec_adap);
goto err_hdl;
}
irq_mask |= MASK_CEC_RMSK | MASK_CEC_TMSK;
#endif
tc358743_initial_setup(sd);
tc358743_s_dv_timings(sd, &default_timing);
tc358743_set_csi_color_space(sd);
tc358743_init_interrupts(sd);
if (state->i2c_client->irq) {
err = devm_request_threaded_irq(&client->dev,
state->i2c_client->irq,
NULL, tc358743_irq_handler,
IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
"tc358743", state);
if (err)
goto err_work_queues;
} else {
INIT_WORK(&state->work_i2c_poll,
tc358743_work_i2c_poll);
timer_setup(&state->timer, tc358743_irq_poll_timer, 0);
state->timer.expires = jiffies +
msecs_to_jiffies(POLL_INTERVAL_MS);
add_timer(&state->timer);
}
err = cec_register_adapter(state->cec_adap, &client->dev);
if (err < 0) {
pr_err("%s: failed to register the cec device\n", __func__);
cec_delete_adapter(state->cec_adap);
state->cec_adap = NULL;
goto err_work_queues;
}
tc358743_enable_interrupts(sd, tx_5v_power_present(sd));
i2c_wr16(sd, INTMASK, ~irq_mask);
err = v4l2_ctrl_handler_setup(sd->ctrl_handler);
if (err)
goto err_work_queues;
v4l2_info(sd, "%s found @ 0x%x (%s)\n", client->name,
client->addr << 1, client->adapter->name);
return 0;
err_work_queues:
cec_unregister_adapter(state->cec_adap);
if (!state->i2c_client->irq)
flush_work(&state->work_i2c_poll);
cancel_delayed_work(&state->delayed_work_enable_hotplug);
mutex_destroy(&state->confctl_mutex);
err_hdl:
media_entity_cleanup(&sd->entity);
v4l2_ctrl_handler_free(&state->hdl);
return err;
}
static int tc358743_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct tc358743_state *state = to_state(sd);
if (!state->i2c_client->irq) {
del_timer_sync(&state->timer);
flush_work(&state->work_i2c_poll);
}
cancel_delayed_work(&state->delayed_work_enable_hotplug);
cec_unregister_adapter(state->cec_adap);
v4l2_async_unregister_subdev(sd);
v4l2_device_unregister_subdev(sd);
mutex_destroy(&state->confctl_mutex);
media_entity_cleanup(&sd->entity);
v4l2_ctrl_handler_free(&state->hdl);
return 0;
}
static const struct i2c_device_id tc358743_id[] = {
{"tc358743", 0},
{}
};
MODULE_DEVICE_TABLE(i2c, tc358743_id);
#if IS_ENABLED(CONFIG_OF)
static const struct of_device_id tc358743_of_match[] = {
{ .compatible = "toshiba,tc358743" },
{},
};
MODULE_DEVICE_TABLE(of, tc358743_of_match);
#endif
static struct i2c_driver tc358743_driver = {
.driver = {
.name = "tc358743",
.of_match_table = of_match_ptr(tc358743_of_match),
},
.probe_new = tc358743_probe,
.remove = tc358743_remove,
.id_table = tc358743_id,
};
module_i2c_driver(tc358743_driver);
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