nathan/CoolPi-Armbian-Rockchip-RK3588-Upstream-Linux-6.1-LTS-Kernel
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
CoolPi-Armbian-Rockchip-RK3.../drivers/media/i2c/lt6911c.c

1442 lines
35 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2024 Rockchip Electronics Co., Ltd.
*
* lt6911c HDMI to MIPI CSI-2 bridge driver.
*
* Author: Jianwei Fan <jianwei.fan@rock-chips.com>
*
* V0.0X01.0X00 first version.
*
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/hdmi.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_graph.h>
#include <linux/rk-camera-module.h>
#include <linux/slab.h>
#include <linux/timer.h>
#include <linux/v4l2-dv-timings.h>
#include <linux/version.h>
#include <linux/videodev2.h>
#include <linux/workqueue.h>
#include <linux/compat.h>
#include <media/v4l2-controls_rockchip.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-dv-timings.h>
#include <media/v4l2-event.h>
#include <media/v4l2-fwnode.h>
#define DRIVER_VERSION KERNEL_VERSION(0, 0x01, 0x00)
static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "debug level (0-3)");
#define I2C_MAX_XFER_SIZE 128
#define POLL_INTERVAL_MS 1000
#define LT6911C_LINK_FREQ 400000000
#define LT6911C_PIXEL_RATE 400000000
#define LT6911C_CHIPID 0x0516
#define CHIPID_REGH 0xA001
#define CHIPID_REGL 0xA000
#define I2C_EN_REG 0x80EE
#define I2C_ENABLE 0x1
#define I2C_DISABLE 0x0
#define AD_HALF_PIX_CLK 0x21
#define SOURCE_DP_RX 0x10
#define RECEIVED_INT 1
#define HTOTAL_H 0xd289
#define HTOTAL_L 0xd28a
#define HACT_H 0xd28b
#define HACT_L 0xd28c
#define HFP_H 0xd29c
#define HFP_L 0xd29d
#define HS_H 0xd294
#define HS_L 0xd295
#define HBP_H 0xd298
#define HBP_L 0xd299
#define VTOTAL_H 0xd29e
#define VTOTAL_L 0xd29f
#define VACT_H 0xd296
#define VACT_L 0xd297
#define VBP 0xd287
#define VFP 0xd288
#define VS 0xd286
#define FM_CLK_SEL 0xa034
#define FREQ_METER_H 0xb8b1
#define FREQ_METER_M 0xb8b2
#define FREQ_METER_L 0xb8b3
#define RG_MK_PRESET_SEL 0xd283
#define STREAM_CTL 0x900a
#define ENABLE_STREAM 0xbf
#define DISABLE_STREAM 0xbe
#define LT6911C_NAME "LT6911C"
static const s64 link_freq_menu_items[] = {
LT6911C_LINK_FREQ,
};
struct lt6911c_state {
struct v4l2_mbus_config_mipi_csi2 bus;
struct v4l2_subdev sd;
struct media_pad pad;
struct v4l2_ctrl_handler hdl;
struct i2c_client *i2c_client;
struct mutex confctl_mutex;
struct v4l2_ctrl *detect_tx_5v_ctrl;
struct v4l2_ctrl *audio_sampling_rate_ctrl;
struct v4l2_ctrl *audio_present_ctrl;
struct v4l2_ctrl *link_freq;
struct v4l2_ctrl *pixel_rate;
struct delayed_work delayed_work_enable_hotplug;
struct delayed_work delayed_work_res_change;
struct v4l2_dv_timings timings;
struct clk *xvclk;
struct gpio_desc *reset_gpio;
struct gpio_desc *plugin_det_gpio;
struct gpio_desc *hpd_ctl_gpio;
struct gpio_desc *power_gpio;
struct work_struct work_i2c_poll;
struct timer_list timer;
const char *module_facing;
const char *module_name;
const char *len_name;
const struct lt6911c_mode *cur_mode;
bool nosignal;
bool enable_hdcp;
bool is_audio_present;
int plugin_irq;
u32 mbus_fmt_code;
u8 csi_lanes_in_use;
u32 module_index;
u32 audio_sampling_rate;
};
static const struct v4l2_dv_timings_cap lt6911c_timings_cap = {
.type = V4L2_DV_BT_656_1120,
.reserved = { 0 },
V4L2_INIT_BT_TIMINGS(1, 10000, 1, 10000, 0, 400000000,
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_INTERLACED |
V4L2_DV_BT_CAP_REDUCED_BLANKING |
V4L2_DV_BT_CAP_CUSTOM)
};
struct lt6911c_mode {
u32 width;
u32 height;
struct v4l2_fract max_fps;
u32 hts_def;
u32 vts_def;
u32 exp_def;
};
static const struct lt6911c_mode supported_modes[] = {
{
.width = 1920,
.height = 1080,
.max_fps = {
.numerator = 10000,
.denominator = 600000,
},
.hts_def = 2200,
.vts_def = 1125,
}, {
.width = 1280,
.height = 720,
.max_fps = {
.numerator = 10000,
.denominator = 600000,
},
.hts_def = 1650,
.vts_def = 750,
}, {
.width = 720,
.height = 576,
.max_fps = {
.numerator = 10000,
.denominator = 500000,
},
.hts_def = 864,
.vts_def = 625,
}, {
.width = 720,
.height = 480,
.max_fps = {
.numerator = 10000,
.denominator = 600000,
},
.hts_def = 858,
.vts_def = 525,
},
};
static void lt6911c_format_change(struct v4l2_subdev *sd);
static int lt6911c_s_ctrl_detect_tx_5v(struct v4l2_subdev *sd);
static int lt6911c_s_dv_timings(struct v4l2_subdev *sd,
struct v4l2_dv_timings *timings);
static inline struct lt6911c_state *to_state(struct v4l2_subdev *sd)
{
return container_of(sd, struct lt6911c_state, sd);
}
static void i2c_rd(struct v4l2_subdev *sd, u16 reg, u8 *values, u32 n)
{
struct lt6911c_state *lt6911c = to_state(sd);
struct i2c_client *client = lt6911c->i2c_client;
int err;
u8 buf[2] = { 0xFF, reg >> 8};
u8 reg_addr = reg & 0xFF;
struct i2c_msg msgs[3];
msgs[0].addr = client->addr;
msgs[0].flags = 0;
msgs[0].len = 2;
msgs[0].buf = buf;
msgs[1].addr = client->addr;
msgs[1].flags = 0;
msgs[1].len = 1;
msgs[1].buf = &reg_addr;
msgs[2].addr = client->addr;
msgs[2].flags = I2C_M_RD;
msgs[2].len = n;
msgs[2].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);
}
if (!debug)
return;
switch (n) {
case 1:
v4l2_info(sd, "I2C read 0x%04x = 0x%02x\n",
reg, values[0]);
break;
case 2:
v4l2_info(sd, "I2C read 0x%04x = 0x%02x%02x\n",
reg, values[1], values[0]);
break;
case 4:
v4l2_info(sd, "I2C read 0x%04x = 0x%02x%02x%02x%02x\n",
reg, values[3], values[2], values[1], values[0]);
break;
default:
v4l2_info(sd, "I2C read %d bytes from address 0x%04x\n",
n, reg);
}
}
static void i2c_wr(struct v4l2_subdev *sd, u16 reg, u8 *values, u32 n)
{
struct lt6911c_state *lt6911c = to_state(sd);
struct i2c_client *client = lt6911c->i2c_client;
int err, i;
struct i2c_msg msgs[2];
u8 data[I2C_MAX_XFER_SIZE];
u8 buf[2] = { 0xFF, reg >> 8};
if ((1 + n) > I2C_MAX_XFER_SIZE) {
n = I2C_MAX_XFER_SIZE - 1;
v4l2_warn(sd, "i2c wr reg=%04x: len=%d is too big!\n",
reg, 1 + n);
}
msgs[0].addr = client->addr;
msgs[0].flags = 0;
msgs[0].len = 2;
msgs[0].buf = buf;
msgs[1].addr = client->addr;
msgs[1].flags = 0;
msgs[1].len = 1 + n;
msgs[1].buf = data;
data[0] = reg & 0xff;
for (i = 0; i < n; i++)
data[1 + i] = values[i];
err = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
if (err < 0) {
v4l2_err(sd, "%s: writing register 0x%x from 0x%x failed\n",
__func__, reg, client->addr);
return;
}
if (!debug)
return;
switch (n) {
case 1:
v4l2_info(sd, "I2C write 0x%04x = 0x%02x\n",
reg, data[1]);
break;
case 2:
v4l2_info(sd, "I2C write 0x%04x = 0x%02x%02x\n",
reg, data[2], data[1]);
break;
case 4:
v4l2_info(sd, "I2C write 0x%04x = 0x%02x%02x%02x%02x\n",
reg, data[4], data[3], data[2], data[1]);
break;
default:
v4l2_info(sd, "I2C write %d bytes from address 0x%04x\n",
n, reg);
}
}
static u8 i2c_rd8(struct v4l2_subdev *sd, u16 reg)
{
u32 val;
i2c_rd(sd, reg, (u8 __force *)&val, 1);
return val;
}
static void i2c_wr8(struct v4l2_subdev *sd, u16 reg, u8 val)
{
i2c_wr(sd, reg, &val, 1);
}
static void lt6911c_i2c_enable(struct v4l2_subdev *sd)
{
i2c_wr8(sd, I2C_EN_REG, I2C_ENABLE);
}
static void lt6911c_i2c_disable(struct v4l2_subdev *sd)
{
i2c_wr8(sd, I2C_EN_REG, I2C_DISABLE);
}
static inline bool tx_5v_power_present(struct v4l2_subdev *sd)
{
bool ret;
int val, i, cnt;
struct lt6911c_state *lt6911c = to_state(sd);
/* if not use plugin det gpio */
if (!lt6911c->plugin_det_gpio)
return true;
cnt = 0;
for (i = 0; i < 5; i++) {
val = gpiod_get_value(lt6911c->plugin_det_gpio);
if (val > 0)
cnt++;
usleep_range(500, 600);
}
ret = (cnt >= 3) ? true : false;
v4l2_dbg(1, debug, sd, "%s: %d\n", __func__, ret);
return ret;
}
static inline bool no_signal(struct v4l2_subdev *sd)
{
struct lt6911c_state *lt6911c = to_state(sd);
v4l2_dbg(1, debug, sd, "%s no signal:%d\n", __func__,
lt6911c->nosignal);
return lt6911c->nosignal;
}
static inline bool audio_present(struct v4l2_subdev *sd)
{
struct lt6911c_state *lt6911c = to_state(sd);
return lt6911c->is_audio_present;
}
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
};
if (no_signal(sd))
return 0;
return code_to_rate[2];
}
static inline unsigned int fps_calc(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 int)t->pixelclock,
V4L2_DV_BT_FRAME_HEIGHT(t) * V4L2_DV_BT_FRAME_WIDTH(t));
}
static bool lt6911c_rcv_supported_res(struct v4l2_subdev *sd, u32 width,
u32 height)
{
u32 i;
for (i = 0; i < ARRAY_SIZE(supported_modes); i++) {
if ((supported_modes[i].width == width) &&
(supported_modes[i].height == height)) {
break;
}
}
if (i == ARRAY_SIZE(supported_modes)) {
v4l2_err(sd, "%s do not support res wxh: %dx%d\n", __func__,
width, height);
return false;
} else {
return true;
}
}
static int lt6911c_get_detected_timings(struct v4l2_subdev *sd,
struct v4l2_dv_timings *timings)
{
struct lt6911c_state *lt6911c = to_state(sd);
struct v4l2_bt_timings *bt = &timings->bt;
u32 hact, vact, htotal, vtotal;
u32 hbp, hs, hfp, vbp, vs, vfp;
u32 pixel_clock, fps, halt_pix_clk;
u8 clk_h, clk_m, clk_l;
u8 value, val_h, val_l;
memset(timings, 0, sizeof(struct v4l2_dv_timings));
lt6911c_i2c_enable(sd);
i2c_wr8(sd, FM_CLK_SEL, AD_HALF_PIX_CLK);
mdelay(10);
clk_h = i2c_rd8(sd, FREQ_METER_H);
clk_m = i2c_rd8(sd, FREQ_METER_M);
clk_l = i2c_rd8(sd, FREQ_METER_L);
halt_pix_clk = (((clk_h & 0xf) << 16) | (clk_m << 8) | clk_l);
pixel_clock = halt_pix_clk * 2 * 1000;
i2c_wr8(sd, RG_MK_PRESET_SEL, SOURCE_DP_RX);
mdelay(10);
val_h = i2c_rd8(sd, HTOTAL_H);
val_l = i2c_rd8(sd, HTOTAL_L);
htotal = ((val_h << 8) | val_l) * 2;
val_h = i2c_rd8(sd, VTOTAL_H);
val_l = i2c_rd8(sd, VTOTAL_L);
vtotal = (val_h << 8) | val_l;
val_h = i2c_rd8(sd, HACT_H);
val_l = i2c_rd8(sd, HACT_L);
hact = ((val_h << 8) | val_l) * 2;
val_h = i2c_rd8(sd, VACT_H);
val_l = i2c_rd8(sd, VACT_L);
vact = (val_h << 8) | val_l;
val_h = i2c_rd8(sd, HS_H);
val_l = i2c_rd8(sd, HS_L);
hs = ((val_h << 8) | val_l) * 2;
value = i2c_rd8(sd, VS);
vs = value;
val_h = i2c_rd8(sd, HFP_H);
val_l = i2c_rd8(sd, HFP_L);
hfp = ((val_h << 8) | val_l) * 2;
value = i2c_rd8(sd, VFP);
vfp = value;
val_h = i2c_rd8(sd, HBP_H);
val_l = i2c_rd8(sd, HBP_L);
hbp = ((val_h << 8) | val_l) * 2;
value = i2c_rd8(sd, VBP);
vbp = value;
lt6911c_i2c_disable(sd);
if (!lt6911c_rcv_supported_res(sd, hact, vact)) {
lt6911c->nosignal = true;
v4l2_err(sd, "%s: rcv err res, return no signal!\n", __func__);
return -EINVAL;
}
lt6911c->nosignal = false;
lt6911c->is_audio_present = true;
timings->type = V4L2_DV_BT_656_1120;
bt->interlaced = V4L2_DV_PROGRESSIVE;
bt->width = hact;
bt->height = vact;
bt->vsync = vs;
bt->hsync = hs;
bt->pixelclock = pixel_clock;
bt->hfrontporch = hfp;
bt->vfrontporch = vfp;
bt->hbackporch = hbp;
bt->vbackporch = vbp;
fps = fps_calc(bt);
v4l2_info(sd, "act:%dx%d, total:%dx%d, pixclk:%d, fps:%d\n",
hact, vact, htotal, vtotal, pixel_clock, fps);
v4l2_info(sd, "hfp:%d, hs:%d, hbp:%d, vfp:%d, vs:%d, vbp:%d\n",
bt->hfrontporch, bt->hsync, bt->hbackporch,
bt->vfrontporch, bt->vsync, bt->vbackporch);
v4l2_info(sd, "inerlaced:%d,\n", bt->interlaced);
return 0;
}
static void lt6911c_config_hpd(struct v4l2_subdev *sd)
{
struct lt6911c_state *lt6911c = to_state(sd);
bool plugin;
plugin = tx_5v_power_present(sd);
v4l2_dbg(2, debug, sd, "%s: plugin: %d\n", __func__, plugin);
if (plugin) {
gpiod_set_value(lt6911c->hpd_ctl_gpio, 1);
} else {
lt6911c->nosignal = true;
gpiod_set_value(lt6911c->hpd_ctl_gpio, 0);
}
}
static void lt6911c_delayed_work_enable_hotplug(struct work_struct *work)
{
struct delayed_work *dwork = to_delayed_work(work);
struct lt6911c_state *lt6911c = container_of(dwork,
struct lt6911c_state, delayed_work_enable_hotplug);
struct v4l2_subdev *sd = &lt6911c->sd;
lt6911c_s_ctrl_detect_tx_5v(sd);
}
static void lt6911c_delayed_work_res_change(struct work_struct *work)
{
struct delayed_work *dwork = to_delayed_work(work);
struct lt6911c_state *lt6911c = container_of(dwork,
struct lt6911c_state, delayed_work_res_change);
struct v4l2_subdev *sd = &lt6911c->sd;
lt6911c_format_change(sd);
}
static int lt6911c_s_ctrl_detect_tx_5v(struct v4l2_subdev *sd)
{
struct lt6911c_state *lt6911c = to_state(sd);
return v4l2_ctrl_s_ctrl(lt6911c->detect_tx_5v_ctrl,
tx_5v_power_present(sd));
}
static int lt6911c_s_ctrl_audio_sampling_rate(struct v4l2_subdev *sd)
{
struct lt6911c_state *lt6911c = to_state(sd);
return v4l2_ctrl_s_ctrl(lt6911c->audio_sampling_rate_ctrl,
get_audio_sampling_rate(sd));
}
static int lt6911c_s_ctrl_audio_present(struct v4l2_subdev *sd)
{
struct lt6911c_state *lt6911c = to_state(sd);
return v4l2_ctrl_s_ctrl(lt6911c->audio_present_ctrl,
audio_present(sd));
}
static int lt6911c_update_controls(struct v4l2_subdev *sd)
{
int ret = 0;
ret |= lt6911c_s_ctrl_detect_tx_5v(sd);
ret |= lt6911c_s_ctrl_audio_sampling_rate(sd);
ret |= lt6911c_s_ctrl_audio_present(sd);
return ret;
}
static inline void enable_stream(struct v4l2_subdev *sd, bool enable)
{
v4l2_dbg(2, debug, sd, "%s: %sable\n",
__func__, enable ? "en" : "dis");
}
static void lt6911c_format_change(struct v4l2_subdev *sd)
{
struct lt6911c_state *lt6911c = to_state(sd);
struct v4l2_dv_timings timings;
const struct v4l2_event lt6911c_ev_fmt = {
.type = V4L2_EVENT_SOURCE_CHANGE,
.u.src_change.changes = V4L2_EVENT_SRC_CH_RESOLUTION,
};
if (lt6911c_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(&lt6911c->timings, &timings, 0, false)) {
enable_stream(sd, false);
/* automatically set timing rather than set by user */
lt6911c_s_dv_timings(sd, &timings);
v4l2_print_dv_timings(sd->name,
"Format_change: New format: ",
&timings, false);
}
}
if (sd->devnode)
v4l2_subdev_notify_event(sd, &lt6911c_ev_fmt);
}
static int lt6911c_isr(struct v4l2_subdev *sd, u32 status, bool *handled)
{
struct lt6911c_state *lt6911c = to_state(sd);
schedule_delayed_work(&lt6911c->delayed_work_res_change, HZ / 20);
*handled = true;
return 0;
}
static irqreturn_t lt6911c_res_change_irq_handler(int irq, void *dev_id)
{
struct lt6911c_state *lt6911c = dev_id;
bool handled;
lt6911c_isr(&lt6911c->sd, 0, &handled);
return handled ? IRQ_HANDLED : IRQ_NONE;
}
static irqreturn_t plugin_detect_irq_handler(int irq, void *dev_id)
{
struct lt6911c_state *lt6911c = dev_id;
struct v4l2_subdev *sd = &lt6911c->sd;
/* control hpd output level after 25ms */
schedule_delayed_work(&lt6911c->delayed_work_enable_hotplug,
HZ / 40);
tx_5v_power_present(sd);
return IRQ_HANDLED;
}
static void lt6911c_irq_poll_timer(struct timer_list *t)
{
struct lt6911c_state *lt6911c = from_timer(lt6911c, t, timer);
schedule_work(&lt6911c->work_i2c_poll);
mod_timer(&lt6911c->timer, jiffies + msecs_to_jiffies(POLL_INTERVAL_MS));
}
static void lt6911c_work_i2c_poll(struct work_struct *work)
{
struct lt6911c_state *lt6911c = container_of(work,
struct lt6911c_state, work_i2c_poll);
struct v4l2_subdev *sd = &lt6911c->sd;
lt6911c_format_change(sd);
}
static int lt6911c_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;
}
}
static int lt6911c_g_input_status(struct v4l2_subdev *sd, u32 *status)
{
*status = 0;
*status |= no_signal(sd) ? V4L2_IN_ST_NO_SIGNAL : 0;
v4l2_dbg(1, debug, sd, "%s: status = 0x%x\n", __func__, *status);
return 0;
}
static int lt6911c_s_dv_timings(struct v4l2_subdev *sd,
struct v4l2_dv_timings *timings)
{
struct lt6911c_state *lt6911c = to_state(sd);
if (!timings)
return -EINVAL;
if (debug)
v4l2_print_dv_timings(sd->name, "s_dv_timings: ",
timings, false);
if (v4l2_match_dv_timings(&lt6911c->timings, timings, 0, false)) {
v4l2_dbg(1, debug, sd, "%s: no change\n", __func__);
return 0;
}
if (!v4l2_valid_dv_timings(timings,
&lt6911c_timings_cap, NULL, NULL)) {
v4l2_dbg(1, debug, sd, "%s: timings out of range\n", __func__);
return -ERANGE;
}
lt6911c->timings = *timings;
enable_stream(sd, false);
return 0;
}
static int lt6911c_g_dv_timings(struct v4l2_subdev *sd,
struct v4l2_dv_timings *timings)
{
struct lt6911c_state *lt6911c = to_state(sd);
*timings = lt6911c->timings;
return 0;
}
static int lt6911c_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,
&lt6911c_timings_cap, NULL, NULL);
}
static int lt6911c_query_dv_timings(struct v4l2_subdev *sd,
struct v4l2_dv_timings *timings)
{
struct lt6911c_state *lt6911c = to_state(sd);
*timings = lt6911c->timings;
if (debug)
v4l2_print_dv_timings(sd->name,
"query_dv_timings: ", timings, false);
if (!v4l2_valid_dv_timings(timings, &lt6911c_timings_cap, NULL,
NULL)) {
v4l2_dbg(1, debug, sd, "%s: timings out of range\n",
__func__);
return -ERANGE;
}
return 0;
}
static int lt6911c_dv_timings_cap(struct v4l2_subdev *sd,
struct v4l2_dv_timings_cap *cap)
{
if (cap->pad != 0)
return -EINVAL;
*cap = lt6911c_timings_cap;
return 0;
}
static int lt6911c_g_mbus_config(struct v4l2_subdev *sd,
unsigned int pad, struct v4l2_mbus_config *cfg)
{
struct lt6911c_state *lt6911c = to_state(sd);
cfg->type = V4L2_MBUS_CSI2_DPHY;
cfg->bus.mipi_csi2 = lt6911c->bus;
return 0;
}
static int lt6911c_s_stream(struct v4l2_subdev *sd, int enable)
{
enable_stream(sd, enable);
return 0;
}
static int lt6911c_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_mbus_code_enum *code)
{
switch (code->index) {
case 0:
code->code = MEDIA_BUS_FMT_UYVY8_2X8;
break;
default:
return -EINVAL;
}
return 0;
}
static int lt6911c_enum_frame_sizes(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_frame_size_enum *fse)
{
if (fse->index >= ARRAY_SIZE(supported_modes))
return -EINVAL;
if (fse->code != MEDIA_BUS_FMT_UYVY8_2X8)
return -EINVAL;
fse->min_width = supported_modes[fse->index].width;
fse->max_width = supported_modes[fse->index].width;
fse->max_height = supported_modes[fse->index].height;
fse->min_height = supported_modes[fse->index].height;
return 0;
}
static int lt6911c_get_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *format)
{
struct lt6911c_state *lt6911c = to_state(sd);
mutex_lock(&lt6911c->confctl_mutex);
format->format.code = lt6911c->mbus_fmt_code;
format->format.width = lt6911c->timings.bt.width;
format->format.height = lt6911c->timings.bt.height;
format->format.field =
lt6911c->timings.bt.interlaced ?
V4L2_FIELD_INTERLACED : V4L2_FIELD_NONE;
format->format.colorspace = V4L2_COLORSPACE_SRGB;
mutex_unlock(&lt6911c->confctl_mutex);
v4l2_dbg(1, debug, sd, "%s: fmt code:%d, w:%d, h:%d, field code:%d\n",
__func__, format->format.code, format->format.width,
format->format.height, format->format.field);
return 0;
}
static int lt6911c_enum_frame_interval(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_frame_interval_enum *fie)
{
if (fie->index >= ARRAY_SIZE(supported_modes))
return -EINVAL;
if (fie->code != MEDIA_BUS_FMT_UYVY8_2X8)
return -EINVAL;
fie->width = supported_modes[fie->index].width;
fie->height = supported_modes[fie->index].height;
fie->interval = supported_modes[fie->index].max_fps;
return 0;
}
static int lt6911c_get_reso_dist(const struct lt6911c_mode *mode,
struct v4l2_mbus_framefmt *framefmt)
{
return abs(mode->width - framefmt->width) +
abs(mode->height - framefmt->height);
}
static const struct lt6911c_mode *
lt6911c_find_best_fit(struct v4l2_subdev_format *fmt)
{
struct v4l2_mbus_framefmt *framefmt = &fmt->format;
int dist;
int cur_best_fit = 0;
int cur_best_fit_dist = -1;
unsigned int i;
for (i = 0; i < ARRAY_SIZE(supported_modes); i++) {
dist = lt6911c_get_reso_dist(&supported_modes[i], framefmt);
if (cur_best_fit_dist == -1 || dist < cur_best_fit_dist) {
cur_best_fit_dist = dist;
cur_best_fit = i;
}
}
return &supported_modes[cur_best_fit];
}
static int lt6911c_set_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *format)
{
struct lt6911c_state *lt6911c = to_state(sd);
const struct lt6911c_mode *mode;
/* is overwritten by get_fmt */
u32 code = format->format.code;
int ret = lt6911c_get_fmt(sd, sd_state, format);
format->format.code = code;
if (ret)
return ret;
switch (code) {
case MEDIA_BUS_FMT_UYVY8_2X8:
break;
default:
return -EINVAL;
}
if (format->which == V4L2_SUBDEV_FORMAT_TRY)
return 0;
lt6911c->mbus_fmt_code = format->format.code;
mode = lt6911c_find_best_fit(format);
lt6911c->cur_mode = mode;
enable_stream(sd, false);
return 0;
}
static int lt6911c_g_frame_interval(struct v4l2_subdev *sd,
struct v4l2_subdev_frame_interval *fi)
{
struct lt6911c_state *lt6911c = to_state(sd);
const struct lt6911c_mode *mode = lt6911c->cur_mode;
mutex_lock(&lt6911c->confctl_mutex);
fi->interval = mode->max_fps;
mutex_unlock(&lt6911c->confctl_mutex);
return 0;
}
static void lt6911c_get_module_inf(struct lt6911c_state *lt6911c,
struct rkmodule_inf *inf)
{
memset(inf, 0, sizeof(*inf));
strscpy(inf->base.sensor, LT6911C_NAME, sizeof(inf->base.sensor));
strscpy(inf->base.module, lt6911c->module_name, sizeof(inf->base.module));
strscpy(inf->base.lens, lt6911c->len_name, sizeof(inf->base.lens));
}
static long lt6911c_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
{
struct lt6911c_state *lt6911c = to_state(sd);
long ret = 0;
switch (cmd) {
case RKMODULE_GET_MODULE_INFO:
lt6911c_get_module_inf(lt6911c, (struct rkmodule_inf *)arg);
break;
case RKMODULE_GET_HDMI_MODE:
*(int *)arg = RKMODULE_HDMIIN_MODE;
break;
default:
ret = -ENOIOCTLCMD;
break;
}
return ret;
}
#ifdef CONFIG_COMPAT
static long lt6911c_compat_ioctl32(struct v4l2_subdev *sd,
unsigned int cmd, unsigned long arg)
{
void __user *up = compat_ptr(arg);
struct rkmodule_inf *inf;
long ret;
int *seq;
switch (cmd) {
case RKMODULE_GET_MODULE_INFO:
inf = kzalloc(sizeof(*inf), GFP_KERNEL);
if (!inf) {
ret = -ENOMEM;
return ret;
}
ret = lt6911c_ioctl(sd, cmd, inf);
if (!ret) {
ret = copy_to_user(up, inf, sizeof(*inf));
if (ret)
ret = -EFAULT;
}
kfree(inf);
break;
case RKMODULE_GET_HDMI_MODE:
seq = kzalloc(sizeof(*seq), GFP_KERNEL);
if (!seq) {
ret = -ENOMEM;
return ret;
}
ret = lt6911c_ioctl(sd, cmd, seq);
if (!ret) {
ret = copy_to_user(up, seq, sizeof(*seq));
if (ret)
ret = -EFAULT;
}
kfree(seq);
break;
default:
ret = -ENOIOCTLCMD;
break;
}
return ret;
}
#endif
static const struct v4l2_subdev_core_ops lt6911c_core_ops = {
.interrupt_service_routine = lt6911c_isr,
.subscribe_event = lt6911c_subscribe_event,
.unsubscribe_event = v4l2_event_subdev_unsubscribe,
.ioctl = lt6911c_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl32 = lt6911c_compat_ioctl32,
#endif
};
static const struct v4l2_subdev_video_ops lt6911c_video_ops = {
.g_input_status = lt6911c_g_input_status,
.s_dv_timings = lt6911c_s_dv_timings,
.g_dv_timings = lt6911c_g_dv_timings,
.query_dv_timings = lt6911c_query_dv_timings,
.s_stream = lt6911c_s_stream,
.g_frame_interval = lt6911c_g_frame_interval,
};
static const struct v4l2_subdev_pad_ops lt6911c_pad_ops = {
.enum_mbus_code = lt6911c_enum_mbus_code,
.enum_frame_size = lt6911c_enum_frame_sizes,
.enum_frame_interval = lt6911c_enum_frame_interval,
.set_fmt = lt6911c_set_fmt,
.get_fmt = lt6911c_get_fmt,
.enum_dv_timings = lt6911c_enum_dv_timings,
.dv_timings_cap = lt6911c_dv_timings_cap,
.get_mbus_config = lt6911c_g_mbus_config,
};
static const struct v4l2_subdev_ops lt6911c_ops = {
.core = &lt6911c_core_ops,
.video = &lt6911c_video_ops,
.pad = &lt6911c_pad_ops,
};
static const struct v4l2_ctrl_config lt6911c_ctrl_audio_sampling_rate = {
.id = RK_V4L2_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 lt6911c_ctrl_audio_present = {
.id = RK_V4L2_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,
};
static void lt6911c_reset(struct lt6911c_state *lt6911c)
{
gpiod_set_value(lt6911c->reset_gpio, 0);
usleep_range(2000, 2100);
gpiod_set_value(lt6911c->reset_gpio, 1);
usleep_range(120*1000, 121*1000);
gpiod_set_value(lt6911c->reset_gpio, 0);
usleep_range(300*1000, 310*1000);
}
static int lt6911c_init_v4l2_ctrls(struct lt6911c_state *lt6911c)
{
struct v4l2_subdev *sd;
int ret;
sd = &lt6911c->sd;
ret = v4l2_ctrl_handler_init(&lt6911c->hdl, 5);
if (ret)
return ret;
lt6911c->link_freq = v4l2_ctrl_new_int_menu(&lt6911c->hdl, NULL,
V4L2_CID_LINK_FREQ,
ARRAY_SIZE(link_freq_menu_items) - 1, 0,
link_freq_menu_items);
lt6911c->pixel_rate = v4l2_ctrl_new_std(&lt6911c->hdl, NULL,
V4L2_CID_PIXEL_RATE,
0, LT6911C_PIXEL_RATE, 1, LT6911C_PIXEL_RATE);
lt6911c->detect_tx_5v_ctrl = v4l2_ctrl_new_std(&lt6911c->hdl,
NULL, V4L2_CID_DV_RX_POWER_PRESENT,
0, 1, 0, 0);
lt6911c->audio_sampling_rate_ctrl =
v4l2_ctrl_new_custom(&lt6911c->hdl,
&lt6911c_ctrl_audio_sampling_rate, NULL);
lt6911c->audio_present_ctrl = v4l2_ctrl_new_custom(&lt6911c->hdl,
&lt6911c_ctrl_audio_present, NULL);
sd->ctrl_handler = &lt6911c->hdl;
if (lt6911c->hdl.error) {
ret = lt6911c->hdl.error;
v4l2_err(sd, "cfg v4l2 ctrls failed! ret:%d\n", ret);
return ret;
}
__v4l2_ctrl_s_ctrl(lt6911c->link_freq, link_freq_menu_items[0]);
__v4l2_ctrl_s_ctrl_int64(lt6911c->pixel_rate, LT6911C_PIXEL_RATE);
if (lt6911c_update_controls(sd)) {
ret = -ENODEV;
v4l2_err(sd, "update v4l2 ctrls failed! ret:%d\n", ret);
return ret;
}
return 0;
}
#ifdef CONFIG_OF
static int lt6911c_probe_of(struct lt6911c_state *lt6911c)
{
struct device *dev = &lt6911c->i2c_client->dev;
struct device_node *node = dev->of_node;
struct v4l2_fwnode_endpoint endpoint = { .bus_type = 0 };
struct device_node *ep;
int ret;
ret = of_property_read_u32(node, RKMODULE_CAMERA_MODULE_INDEX,
&lt6911c->module_index);
ret |= of_property_read_string(node, RKMODULE_CAMERA_MODULE_FACING,
&lt6911c->module_facing);
ret |= of_property_read_string(node, RKMODULE_CAMERA_MODULE_NAME,
&lt6911c->module_name);
ret |= of_property_read_string(node, RKMODULE_CAMERA_LENS_NAME,
&lt6911c->len_name);
if (ret) {
dev_err(dev, "could not get module information!\n");
return -EINVAL;
}
lt6911c->power_gpio = devm_gpiod_get_optional(dev, "power",
GPIOD_OUT_LOW);
if (IS_ERR(lt6911c->power_gpio)) {
dev_err(dev, "failed to get power gpio\n");
ret = PTR_ERR(lt6911c->power_gpio);
return ret;
}
lt6911c->reset_gpio = devm_gpiod_get_optional(dev, "reset",
GPIOD_OUT_HIGH);
if (IS_ERR(lt6911c->reset_gpio)) {
dev_err(dev, "failed to get reset gpio\n");
ret = PTR_ERR(lt6911c->reset_gpio);
return ret;
}
lt6911c->plugin_det_gpio = devm_gpiod_get_optional(dev, "plugin-det",
GPIOD_IN);
if (IS_ERR(lt6911c->plugin_det_gpio)) {
dev_err(dev, "failed to get plugin det gpio\n");
ret = PTR_ERR(lt6911c->plugin_det_gpio);
return ret;
}
lt6911c->hpd_ctl_gpio = devm_gpiod_get_optional(dev, "hpd-ctl",
GPIOD_OUT_HIGH);
if (IS_ERR(lt6911c->hpd_ctl_gpio)) {
dev_err(dev, "failed to get hpd ctl gpio\n");
ret = PTR_ERR(lt6911c->hpd_ctl_gpio);
return ret;
}
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) {
dev_err(dev, "missing CSI-2 properties in endpoint\n");
ret = -EINVAL;
goto free_endpoint;
}
lt6911c->xvclk = devm_clk_get(dev, "xvclk");
if (IS_ERR(lt6911c->xvclk)) {
dev_err(dev, "failed to get xvclk\n");
ret = -EINVAL;
goto free_endpoint;
}
ret = clk_prepare_enable(lt6911c->xvclk);
if (ret) {
dev_err(dev, "Failed! to enable xvclk\n");
goto free_endpoint;
}
lt6911c->csi_lanes_in_use = endpoint.bus.mipi_csi2.num_data_lanes;
lt6911c->bus = endpoint.bus.mipi_csi2;
lt6911c->enable_hdcp = false;
gpiod_set_value(lt6911c->hpd_ctl_gpio, 0);
gpiod_set_value(lt6911c->power_gpio, 1);
lt6911c_reset(lt6911c);
ret = 0;
free_endpoint:
v4l2_fwnode_endpoint_free(&endpoint);
put_node:
of_node_put(ep);
return ret;
}
#else
static inline int lt6911c_probe_of(struct lt6911c_state *state)
{
return -ENODEV;
}
#endif
static int lt6911c_check_chip_id(struct lt6911c_state *lt6911c)
{
struct device *dev = &lt6911c->i2c_client->dev;
struct v4l2_subdev *sd = &lt6911c->sd;
u8 id_h, id_l;
u32 chipid;
int ret = 0;
lt6911c_i2c_enable(sd);
id_l = i2c_rd8(sd, CHIPID_REGL);
id_h = i2c_rd8(sd, CHIPID_REGH);
lt6911c_i2c_disable(sd);
chipid = (id_h << 8) | id_l;
if (chipid != LT6911C_CHIPID) {
dev_err(dev, "chipid err, read:%#x, expect:%#x\n",
chipid, LT6911C_CHIPID);
return -EINVAL;
}
dev_info(dev, "check chipid ok, id:%#x", chipid);
return ret;
}
static int lt6911c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct lt6911c_state *lt6911c;
struct v4l2_subdev *sd;
struct device *dev = &client->dev;
char facing[2];
int err;
dev_info(dev, "driver version: %02x.%02x.%02x",
DRIVER_VERSION >> 16,
(DRIVER_VERSION & 0xff00) >> 8,
DRIVER_VERSION & 0x00ff);
lt6911c = devm_kzalloc(dev, sizeof(struct lt6911c_state), GFP_KERNEL);
if (!lt6911c)
return -ENOMEM;
sd = &lt6911c->sd;
lt6911c->i2c_client = client;
lt6911c->cur_mode = &supported_modes[0];
lt6911c->mbus_fmt_code = MEDIA_BUS_FMT_UYVY8_2X8;
err = lt6911c_probe_of(lt6911c);
if (err) {
v4l2_err(sd, "lt6911c_parse_of failed! err:%d\n", err);
return err;
}
err = lt6911c_check_chip_id(lt6911c);
if (err < 0)
return err;
lt6911c_reset(lt6911c);
mutex_init(&lt6911c->confctl_mutex);
err = lt6911c_init_v4l2_ctrls(lt6911c);
if (err)
goto err_free_hdl;
client->flags |= I2C_CLIENT_SCCB;
#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
v4l2_i2c_subdev_init(sd, client, &lt6911c_ops);
sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
#endif
#if defined(CONFIG_MEDIA_CONTROLLER)
lt6911c->pad.flags = MEDIA_PAD_FL_SOURCE;
sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
err = media_entity_pads_init(&sd->entity, 1, &lt6911c->pad);
if (err < 0) {
v4l2_err(sd, "media entity init failed! err:%d\n", err);
goto err_free_hdl;
}
#endif
memset(facing, 0, sizeof(facing));
if (strcmp(lt6911c->module_facing, "back") == 0)
facing[0] = 'b';
else
facing[0] = 'f';
snprintf(sd->name, sizeof(sd->name), "m%02d_%s_%s %s",
lt6911c->module_index, facing,
LT6911C_NAME, dev_name(sd->dev));
err = v4l2_async_register_subdev_sensor(sd);
if (err < 0) {
v4l2_err(sd, "v4l2 register subdev failed! err:%d\n", err);
goto err_clean_entity;
}
INIT_DELAYED_WORK(&lt6911c->delayed_work_enable_hotplug,
lt6911c_delayed_work_enable_hotplug);
INIT_DELAYED_WORK(&lt6911c->delayed_work_res_change,
lt6911c_delayed_work_res_change);
if (lt6911c->i2c_client->irq) {
v4l2_dbg(1, debug, sd, "cfg lt6911c irq!\n");
err = devm_request_threaded_irq(dev,
lt6911c->i2c_client->irq,
NULL, lt6911c_res_change_irq_handler,
IRQF_TRIGGER_RISING | IRQF_ONESHOT,
"lt6911c", lt6911c);
if (err) {
v4l2_err(sd, "request irq failed! err:%d\n", err);
goto err_work_queues;
}
} else {
v4l2_dbg(1, debug, sd, "no irq, cfg poll!\n");
INIT_WORK(&lt6911c->work_i2c_poll, lt6911c_work_i2c_poll);
timer_setup(&lt6911c->timer, lt6911c_irq_poll_timer, 0);
lt6911c->timer.expires = jiffies +
msecs_to_jiffies(POLL_INTERVAL_MS);
add_timer(&lt6911c->timer);
}
lt6911c->plugin_irq = gpiod_to_irq(lt6911c->plugin_det_gpio);
if (lt6911c->plugin_irq < 0)
dev_err(dev, "failed to get plugin det irq, maybe no use\n");
err = devm_request_threaded_irq(dev, lt6911c->plugin_irq, NULL,
plugin_detect_irq_handler, IRQF_TRIGGER_FALLING |
IRQF_TRIGGER_RISING | IRQF_ONESHOT, "lt6911c",
lt6911c);
if (err)
dev_err(dev, "failed to register plugin det irq (%d), maybe no use\n", err);
err = v4l2_ctrl_handler_setup(sd->ctrl_handler);
if (err) {
v4l2_err(sd, "v4l2 ctrl handler setup failed! err:%d\n", err);
goto err_work_queues;
}
lt6911c_config_hpd(sd);
v4l2_info(sd, "%s found @ 0x%x (%s)\n", client->name,
client->addr << 1, client->adapter->name);
return 0;
err_work_queues:
if (!lt6911c->i2c_client->irq)
flush_work(&lt6911c->work_i2c_poll);
cancel_delayed_work(&lt6911c->delayed_work_enable_hotplug);
cancel_delayed_work(&lt6911c->delayed_work_res_change);
err_clean_entity:
#if defined(CONFIG_MEDIA_CONTROLLER)
media_entity_cleanup(&sd->entity);
#endif
err_free_hdl:
v4l2_ctrl_handler_free(&lt6911c->hdl);
mutex_destroy(&lt6911c->confctl_mutex);
return err;
}
static void lt6911c_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct lt6911c_state *lt6911c = to_state(sd);
if (!lt6911c->i2c_client->irq) {
del_timer_sync(&lt6911c->timer);
flush_work(&lt6911c->work_i2c_poll);
}
cancel_delayed_work_sync(&lt6911c->delayed_work_enable_hotplug);
cancel_delayed_work_sync(&lt6911c->delayed_work_res_change);
v4l2_async_unregister_subdev(sd);
v4l2_device_unregister_subdev(sd);
#if defined(CONFIG_MEDIA_CONTROLLER)
media_entity_cleanup(&sd->entity);
#endif
v4l2_ctrl_handler_free(&lt6911c->hdl);
mutex_destroy(&lt6911c->confctl_mutex);
clk_disable_unprepare(lt6911c->xvclk);
}
#if IS_ENABLED(CONFIG_OF)
static const struct of_device_id lt6911c_of_match[] = {
{ .compatible = "lontium,lt6911c" },
{},
};
MODULE_DEVICE_TABLE(of, lt6911c_of_match);
#endif
static struct i2c_driver lt6911c_driver = {
.driver = {
.name = LT6911C_NAME,
.of_match_table = of_match_ptr(lt6911c_of_match),
},
.probe = lt6911c_probe,
.remove = lt6911c_remove,
};
static int __init lt6911c_driver_init(void)
{
return i2c_add_driver(&lt6911c_driver);
}
static void __exit lt6911c_driver_exit(void)
{
i2c_del_driver(&lt6911c_driver);
}
device_initcall_sync(lt6911c_driver_init);
module_exit(lt6911c_driver_exit);
MODULE_DESCRIPTION("Lontium lt6911c HDMI to CSI-2 bridge driver");
MODULE_AUTHOR("Jianwei Fan <jianwei.fan@rock-chips.com>");
MODULE_LICENSE("GPL");
Reference in New Issue View Git Blame Copy Permalink