The Techwell video decoder supports PAL, NTSC and SECAM input formats, and outputs a BT.656 signal.
This commit adds support for this device, with basic support for NTSC and PAL, along with brightness and contrast controls. Signed-off-by: Maxime Chevallier <[email protected]> --- v1 -> v2: Set the media entity type to decoder, and implement the s_std/g_std ops MAINTAINERS | 6 + drivers/media/i2c/Kconfig | 9 + drivers/media/i2c/Makefile | 1 + drivers/media/i2c/tw9900.c | 661 +++++++++++++++++++++++++++++++++++++ 4 files changed, 677 insertions(+) create mode 100644 drivers/media/i2c/tw9900.c diff --git a/MAINTAINERS b/MAINTAINERS index 3da6d8c154e4..2890862a8285 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -17160,6 +17160,12 @@ L: [email protected] S: Maintained F: drivers/media/rc/ttusbir.c +TECHWELL TW9900 VIDEO DECODER +M: Maxime Chevallier <[email protected]> +L: [email protected] +S: Maintained +F: drivers/media/i2c/tw9900.c + TECHWELL TW9910 VIDEO DECODER L: [email protected] S: Orphan diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig index 878f66ef2719..ea55aea4d949 100644 --- a/drivers/media/i2c/Kconfig +++ b/drivers/media/i2c/Kconfig @@ -426,6 +426,15 @@ config VIDEO_TW2804 To compile this driver as a module, choose M here: the module will be called tw2804. +config VIDEO_TW9900 + tristate "Techwell TW9900 video decoder" + depends on VIDEO_V4L2 && I2C + help + Support for the Techwell tw9900 multi-standard video decoder. + + To compile this driver as a module, choose M here: the + module will be called tw9900. + config VIDEO_TW9903 tristate "Techwell TW9903 video decoder" depends on VIDEO_V4L2 && I2C diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile index f0a77473979d..cbc1d9aedd38 100644 --- a/drivers/media/i2c/Makefile +++ b/drivers/media/i2c/Makefile @@ -49,6 +49,7 @@ obj-$(CONFIG_VIDEO_TVP5150) += tvp5150.o obj-$(CONFIG_VIDEO_TVP514X) += tvp514x.o obj-$(CONFIG_VIDEO_TVP7002) += tvp7002.o obj-$(CONFIG_VIDEO_TW2804) += tw2804.o +obj-$(CONFIG_VIDEO_TW9900) += tw9900.o obj-$(CONFIG_VIDEO_TW9903) += tw9903.o obj-$(CONFIG_VIDEO_TW9906) += tw9906.o obj-$(CONFIG_VIDEO_TW9910) += tw9910.o diff --git a/drivers/media/i2c/tw9900.c b/drivers/media/i2c/tw9900.c new file mode 100644 index 000000000000..2075c3c120af --- /dev/null +++ b/drivers/media/i2c/tw9900.c @@ -0,0 +1,661 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Driver for the Techwell TW9900 multi-standard video decoder. + * + * Copyright (C) 2018 Fuzhou Rockchip Electronics Co., Ltd. + * Copyright (C) 2020 Maxime Chevallier <[email protected]> + */ + +#include <linux/clk.h> +#include <linux/device.h> +#include <linux/gpio/consumer.h> +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/pm_runtime.h> +#include <linux/regulator/consumer.h> +#include <linux/sysfs.h> +#include <linux/timer.h> +#include <linux/delay.h> +#include <media/media-entity.h> +#include <media/v4l2-async.h> +#include <media/v4l2-ctrls.h> +#include <media/v4l2-event.h> +#include <media/v4l2-subdev.h> + +#define TW9900_REG_CHIP_ID 0x00 +#define TW9900_REG_CHIP_STATUS 0x01 +#define TW9900_REG_CHIP_STATUS_VLOCK 0x08 +#define TW9900_REG_CHIP_STATUS_VDLOSS 0x80 +#define TW9900_REG_OUT_FMT_CTL 0x03 +#define TW9900_REG_CKHY_HSDLY 0x04 +#define TW9900_REG_OUT_CTRL_I 0x05 +#define TW9900_REG_ANALOG_CTL 0x06 +#define TW9900_REG_CROP_HI 0x07 +#define TW9900_REG_VDELAY_LO 0x08 +#define TW9900_REG_VACTIVE_LO 0x09 +#define TW9900_REG_HACTIVE_LO 0x0B +#define TW9900_REG_CNTRL1 0x0C +#define TW9900_REG_BRIGHT_CTL 0x10 +#define TW9900_REG_CONTRAST_CTL 0x11 +#define TW9900_REG_VBI_CNTL 0x19 +#define TW9900_REG_ANAL_CTL_II 0x1A +#define TW9900_REG_OUT_CTRL_II 0x1B +#define TW9900_REG_STD_SEL 0x1C +#define TW9900_REG_MISSCNT 0x26 +#define TW9900_REG_MISC_CTL_II 0x2F +#define TW9900_REG_VVBI 0x55 + +#define TW9900_CHIP_ID 0x00 + +#define REG_SC_CTRL_MODE TW9900_REG_OUT_FMT_CTL +#define SC_CTRL_MODE_STANDBY 0xA7 +#define SC_CTRL_MODE_STREAMING 0xA0 + +#define REG_NULL 0xFF + +#define VSYNC_POLL_INTERVAL_MS 20 +#define VSYNC_WAIT_MAX_POLLS 50 + +static const char * const tw9900_supply_names[] = { + "vdd", +}; + +#define TW9900_NUM_SUPPLIES ARRAY_SIZE(tw9900_supply_names) + +struct regval { + u8 addr; + u8 val; +}; + +struct tw9900_mode { + u32 width; + u32 height; + u32 skip_top; + u32 std; + u32 field; + const struct regval *reg_list; +}; + +struct tw9900 { + struct i2c_client *client; + struct gpio_desc *reset_gpio; + struct regulator_bulk_data supplies[TW9900_NUM_SUPPLIES]; + + bool streaming; + + struct v4l2_subdev subdev; + struct v4l2_ctrl_handler hdl; + struct media_pad pad; + + struct timer_list timer; + struct work_struct work_i2c_poll; + + const struct tw9900_mode *cur_mode; +}; + +#define to_tw9900(sd) container_of(sd, struct tw9900, subdev) + +static const struct regval tw9900_init_regs[] = { + {TW9900_REG_MISC_CTL_II, 0xE6}, + {TW9900_REG_MISSCNT, 0x24}, + {TW9900_REG_OUT_FMT_CTL, 0xA7}, + {TW9900_REG_ANAL_CTL_II, 0x0A}, + {TW9900_REG_VDELAY_LO, 0x19}, + {TW9900_REG_STD_SEL, 0x00}, + {TW9900_REG_VACTIVE_LO, 0xF0}, + {TW9900_REG_STD_SEL, 0x07}, + {TW9900_REG_CKHY_HSDLY, 0x40}, + {TW9900_REG_ANALOG_CTL, 0x80}, + {TW9900_REG_CNTRL1, 0xdc}, + {TW9900_REG_OUT_CTRL_I, 0x98}, + {REG_NULL, 0x0}, +}; + +static const struct regval tw9900_pal_regs[] = { + {TW9900_REG_STD_SEL, 0x01}, + {REG_NULL, 0x0}, +}; + +static const struct regval tw9900_ntsc_regs[] = { + {TW9900_REG_OUT_FMT_CTL, 0xA4}, + {TW9900_REG_VDELAY_LO, 0x12}, + {TW9900_REG_VACTIVE_LO, 0xf0}, + {TW9900_REG_CROP_HI, 0x02}, + {TW9900_REG_HACTIVE_LO, 0xD0}, + {TW9900_REG_VBI_CNTL, 0x01}, + {TW9900_REG_STD_SEL, 0x00}, + {REG_NULL, 0x0}, +}; + +static const struct tw9900_mode supported_modes[] = { + { + .width = 720, + .height = 576, + .skip_top = 0, + .std = V4L2_STD_PAL, + .field = V4L2_FIELD_NONE, + .reg_list = tw9900_pal_regs, + }, + { + .width = 720, + .height = 480, + .skip_top = 0, + .std = V4L2_STD_NTSC, + .field = V4L2_FIELD_NONE, + .reg_list = tw9900_ntsc_regs, + }, +}; + +static int tw9900_write_reg(struct i2c_client *client, u8 reg, u8 val) +{ + int ret; + + ret = i2c_smbus_write_byte_data(client, reg, val); + + if (ret < 0) + dev_err(&client->dev, "write reg error: %d\n", ret); + + return ret; +} + +static int tw9900_write_array(struct i2c_client *client, + const struct regval *regs) +{ + int i, ret = 0; + + for (i = 0; ret == 0 && regs[i].addr != REG_NULL; i++) + ret = tw9900_write_reg(client, regs[i].addr, regs[i].val); + + return ret; +} + +static inline u8 tw9900_read_reg(struct i2c_client *client, u8 reg) +{ + return i2c_smbus_read_byte_data(client, reg); +} + +static void tw9900_fill_fmt(const struct tw9900_mode *mode, + struct v4l2_mbus_framefmt *fmt) +{ + fmt->code = MEDIA_BUS_FMT_UYVY8_2X8; + fmt->width = mode->width; + fmt->height = mode->height; + fmt->field = mode->field; + fmt->colorspace = V4L2_COLORSPACE_SMPTE170M; +} + +static int tw9900_set_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_format *fmt) +{ + struct tw9900 *tw9900 = to_tw9900(sd); + struct v4l2_mbus_framefmt *mbus_fmt = &fmt->format; + + tw9900_fill_fmt(tw9900->cur_mode, mbus_fmt); + + mbus_fmt->width = tw9900->cur_mode->width; + mbus_fmt->height = tw9900->cur_mode->height; + + return 0; +} + +static int tw9900_get_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_format *fmt) +{ + struct tw9900 *tw9900 = to_tw9900(sd); + struct v4l2_mbus_framefmt *mbus_fmt = &fmt->format; + + tw9900_fill_fmt(tw9900->cur_mode, mbus_fmt); + + return 0; +} + +static int tw9900_enum_mbus_code(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_mbus_code_enum *code) +{ + if (code->index >= ARRAY_SIZE(supported_modes)) + return -EINVAL; + + code->code = MEDIA_BUS_FMT_UYVY8_2X8; + + return 0; +} + +static int tw9900_enum_frame_sizes(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_frame_size_enum *fse) +{ + u32 index = fse->index; + + if (index >= ARRAY_SIZE(supported_modes)) + return -EINVAL; + + fse->code = MEDIA_BUS_FMT_UYVY8_2X8; + + fse->min_width = supported_modes[index].width; + fse->max_width = supported_modes[index].width; + fse->max_height = supported_modes[index].height; + fse->min_height = supported_modes[index].height; + + return 0; +} + +static int __tw9900_power_on(struct tw9900 *tw9900) +{ + int ret; + struct device *dev = &tw9900->client->dev; + + if (tw9900->reset_gpio) + gpiod_set_value_cansleep(tw9900->reset_gpio, 1); + + ret = regulator_bulk_enable(TW9900_NUM_SUPPLIES, tw9900->supplies); + if (ret < 0) + goto error; + + usleep_range(50000, 52000); + + if (tw9900->reset_gpio) + gpiod_set_value_cansleep(tw9900->reset_gpio, 0); + + usleep_range(1000, 2000); + + ret = tw9900_write_array(tw9900->client, tw9900_init_regs); + if (ret) { + dev_err(dev, "Failed to init tw9900\n"); + goto error; + } + + return 0; + +error: + + return ret; +} + +static void __tw9900_power_off(struct tw9900 *tw9900) +{ + if (tw9900->reset_gpio) + gpiod_set_value_cansleep(tw9900->reset_gpio, 1); + + regulator_bulk_disable(TW9900_NUM_SUPPLIES, tw9900->supplies); +} + +static int tw9900_s_ctrl(struct v4l2_ctrl *ctrl) +{ + struct tw9900 *tw9900 = container_of(ctrl->handler, struct tw9900, hdl); + + if (pm_runtime_suspended(&tw9900->client->dev)) + return 0; + + switch (ctrl->id) { + case V4L2_CID_BRIGHTNESS: + tw9900_write_reg(tw9900->client, 0x10, (u8)ctrl->val); + break; + case V4L2_CID_CONTRAST: + tw9900_write_reg(tw9900->client, 0x11, (u8)ctrl->val); + break; + default: + return -EINVAL; + } + return 0; +} + +static int tw9900_s_stream(struct v4l2_subdev *sd, int on) +{ + struct tw9900 *tw9900 = to_tw9900(sd); + struct i2c_client *client = tw9900->client; + int i, ret = 0; + + on = !!on; + if (on == tw9900->streaming) + goto unlock_and_return; + + if (on) { + ret = pm_runtime_get_sync(&tw9900->client->dev); + if (ret < 0) { + pm_runtime_put_noidle(&client->dev); + goto unlock_and_return; + } + + ret = v4l2_ctrl_handler_setup(sd->ctrl_handler); + if (ret) { + pm_runtime_put(&client->dev); + goto unlock_and_return; + } + + ret = tw9900_write_array(tw9900->client, + tw9900->cur_mode->reg_list); + if (ret) { + pm_runtime_put(&client->dev); + goto unlock_and_return; + } + + /* Wait for VSync lock */ + for (i = 0; i < VSYNC_WAIT_MAX_POLLS; i++) { + u8 status = tw9900_read_reg(tw9900->client, + TW9900_REG_CHIP_STATUS); + if (!(status & TW9900_REG_CHIP_STATUS_VDLOSS) && + (status & TW9900_REG_CHIP_STATUS_VLOCK)) + break; + + msleep(VSYNC_POLL_INTERVAL_MS); + } + + ret = tw9900_write_reg(client, REG_SC_CTRL_MODE, + SC_CTRL_MODE_STREAMING); + if (ret) { + pm_runtime_put(&client->dev); + goto unlock_and_return; + } + + } else { + tw9900_write_reg(client, REG_SC_CTRL_MODE, + SC_CTRL_MODE_STANDBY); + pm_runtime_put(&client->dev); + } + + tw9900->streaming = on; + +unlock_and_return: + + return ret; +} + +#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API +static int tw9900_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) +{ + struct tw9900 *tw9900 = to_tw9900(sd); + struct v4l2_mbus_framefmt *try_fmt; + + try_fmt = v4l2_subdev_get_try_format(sd, fh->pad, 0); + + /* Initialize try_fmt */ + tw9900_fill_fmt(tw9900->cur_mode, try_fmt); + + return 0; +} +#endif + +static int tw9900_runtime_resume(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct tw9900 *tw9900 = to_tw9900(sd); + + return __tw9900_power_on(tw9900); +} + +static int tw9900_runtime_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct tw9900 *tw9900 = to_tw9900(sd); + + __tw9900_power_off(tw9900); + + return 0; +} + +static int tw9900_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 const struct tw9900_mode *tw9900_get_mode_from_std(v4l2_std_id std) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(supported_modes); i++) { + if (supported_modes[i].std == std) + return &supported_modes[i]; + } + + return NULL; +} + +static int tw9900_s_std(struct v4l2_subdev *sd, v4l2_std_id norm) +{ + struct tw9900 *tw9900 = to_tw9900(sd); + const struct tw9900_mode *mode; + int ret; + + if (!(norm & (V4L2_STD_NTSC | V4L2_STD_PAL))) + return -EINVAL; + + mode = tw9900_get_mode_from_std(norm); + if (!mode) + return -EINVAL; + + ret = tw9900_write_array(tw9900->client, mode->reg_list); + + if (ret) + return ret; + + tw9900->cur_mode = mode; + + return 0; +} + +static int tw9900_g_std(struct v4l2_subdev *sd, v4l2_std_id *norm) +{ + struct tw9900 *tw9900 = to_tw9900(sd); + + *norm = tw9900->cur_mode->std; + + return 0; +} + +static const struct dev_pm_ops tw9900_pm_ops = { + SET_RUNTIME_PM_OPS(tw9900_runtime_suspend, + tw9900_runtime_resume, NULL) +}; + +static const struct v4l2_subdev_core_ops tw9900_core_ops = { + .subscribe_event = tw9900_subscribe_event, + .unsubscribe_event = v4l2_event_subdev_unsubscribe, +}; + +static const struct v4l2_subdev_video_ops tw9900_video_ops = { + .s_std = tw9900_s_std, + .g_std = tw9900_g_std, + .s_stream = tw9900_s_stream, +}; + +static const struct v4l2_subdev_pad_ops tw9900_pad_ops = { + .enum_mbus_code = tw9900_enum_mbus_code, + .enum_frame_size = tw9900_enum_frame_sizes, + .get_fmt = tw9900_get_fmt, + .set_fmt = tw9900_set_fmt, +}; + +static const struct v4l2_subdev_ops tw9900_subdev_ops = { + .core = &tw9900_core_ops, + .video = &tw9900_video_ops, + .pad = &tw9900_pad_ops, +}; + +static const struct v4l2_ctrl_ops tw9900_ctrl_ops = { + .s_ctrl = tw9900_s_ctrl, +}; + +#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API +static const struct v4l2_subdev_internal_ops tw9900_internal_ops = { + .open = tw9900_open, +}; +#endif + +static int tw9900_check_id(struct tw9900 *tw9900, + struct i2c_client *client) +{ + struct device *dev = &tw9900->client->dev; + u8 id; + + id = tw9900_read_reg(client, TW9900_CHIP_ID); + + if (id != TW9900_CHIP_ID) { + dev_err(dev, "Unexpected decoder id(%04x)\n", id); + return -EINVAL; + } + + dev_info(dev, "Detected TW9900 (%04x) decoder\n", TW9900_CHIP_ID); + + return 0; +} + +static int tw9900_configure_regulators(struct tw9900 *tw9900) +{ + u32 i; + + for (i = 0; i < TW9900_NUM_SUPPLIES; i++) + tw9900->supplies[i].supply = tw9900_supply_names[i]; + + return devm_regulator_bulk_get(&tw9900->client->dev, + TW9900_NUM_SUPPLIES, + tw9900->supplies); +} + +static int tw9900_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct device *dev = &client->dev; + struct v4l2_ctrl_handler *hdl; + struct tw9900 *tw9900; + int ret; + + tw9900 = devm_kzalloc(dev, sizeof(*tw9900), GFP_KERNEL); + if (!tw9900) + return -ENOMEM; + + tw9900->client = client; + tw9900->cur_mode = &supported_modes[0]; + + tw9900->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); + if (IS_ERR(tw9900->reset_gpio)) + tw9900->reset_gpio = NULL; + + ret = tw9900_configure_regulators(tw9900); + if (ret) { + dev_err(dev, "Failed to get power regulators\n"); + return ret; + } + + v4l2_i2c_subdev_init(&tw9900->subdev, client, &tw9900_subdev_ops); + tw9900->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS; + + hdl = &tw9900->hdl; + + v4l2_ctrl_handler_init(hdl, 2); + + v4l2_ctrl_new_std(hdl, &tw9900_ctrl_ops, V4L2_CID_BRIGHTNESS, + -128, 127, 1, 0); + v4l2_ctrl_new_std(hdl, &tw9900_ctrl_ops, V4L2_CID_CONTRAST, + 0, 255, 1, 0x60); + + tw9900->subdev.ctrl_handler = hdl; + if (hdl->error) { + int err = hdl->error; + + v4l2_ctrl_handler_free(hdl); + return err; + } + + ret = __tw9900_power_on(tw9900); + if (ret) + return ret; + + ret = tw9900_check_id(tw9900, client); + if (ret) + goto err_power_off; + +#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API + tw9900->subdev.internal_ops = &tw9900_internal_ops; + tw9900->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; +#endif +#if defined(CONFIG_MEDIA_CONTROLLER) + tw9900->pad.flags = MEDIA_PAD_FL_SOURCE; + tw9900->subdev.entity.function = MEDIA_ENT_F_DV_DECODER; + + ret = media_entity_pads_init(&tw9900->subdev.entity, 1, &tw9900->pad); + if (ret < 0) + goto err_power_off; +#endif + + ret = v4l2_async_register_subdev(&tw9900->subdev); + if (ret) { + dev_err(dev, "v4l2 async register subdev failed\n"); + goto err_clean_entity; + } + + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + pm_runtime_idle(dev); + + return 0; + +err_clean_entity: +#if defined(CONFIG_MEDIA_CONTROLLER) + media_entity_cleanup(&tw9900->subdev.entity); +#endif +err_power_off: + __tw9900_power_off(tw9900); + + return ret; +} + +static int tw9900_remove(struct i2c_client *client) +{ + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct tw9900 *tw9900 = to_tw9900(sd); + + v4l2_async_unregister_subdev(sd); +#if defined(CONFIG_MEDIA_CONTROLLER) + media_entity_cleanup(&sd->entity); +#endif + + pm_runtime_disable(&client->dev); + if (!pm_runtime_status_suspended(&client->dev)) + __tw9900_power_off(tw9900); + pm_runtime_set_suspended(&client->dev); + + return 0; +} + +static const struct i2c_device_id tw9900_id[] = { + {"tw9900", 0}, + {}, +}; + +#if IS_ENABLED(CONFIG_OF) +static const struct of_device_id tw9900_of_match[] = { + { .compatible = "techwell,tw9900" }, + {}, +}; +MODULE_DEVICE_TABLE(of, tw9900_of_match); +#endif + +static struct i2c_driver tw9900_i2c_driver = { + .driver = { + .name = "tw9900", + .pm = &tw9900_pm_ops, + .of_match_table = tw9900_of_match + }, + .probe = tw9900_probe, + .remove = tw9900_remove, + .id_table = tw9900_id, +}; + +module_i2c_driver(tw9900_i2c_driver); + +MODULE_DESCRIPTION("tw9900 decoder driver"); +MODULE_LICENSE("GPL v2"); -- 2.25.4
