Interfacing (DSI, CSI, I2C, etc.) • MIPI DSI Display Jadard JD9165

Code:

// SPDX-License-Identifier: GPL-2.0-only/* * Copyright (C) 2016 InforceComputing * Author: Vinay Simha BN <simhavcs@gmail.com> * * Copyright (C) 2016 Linaro Ltd * Author: Sumit Semwal <sumit.semwal@linaro.org> */#include <linux/backlight.h>#include <linux/delay.h>#include <linux/gpio/consumer.h>#include <linux/module.h>#include <linux/of.h>#include <linux/regulator/consumer.h>#include <video/mipi_display.h>#include <drm/drm_crtc.h>#include <drm/drm_mipi_dsi.h>#include <drm/drm_modes.h>#include <drm/drm_panel.h>struct jdi_panel {struct drm_panel base;struct mipi_dsi_device *dsi;struct gpio_desc *enable_gpio;struct gpio_desc *reset_gpio;struct gpio_desc *dcdc_en_gpio;struct backlight_device *backlight;const struct drm_display_mode *mode;};static inline struct jdi_panel *to_jdi_panel(struct drm_panel *panel){return container_of(panel, struct jdi_panel, base);}static int jdi_panel_init(struct jdi_panel *jdi){struct mipi_dsi_device *dsi = jdi->dsi;struct device *dev = &jdi->dsi->dev;int ret;dsi->mode_flags |= MIPI_DSI_MODE_LPM;ret = mipi_dsi_dcs_soft_reset(dsi);if (ret < 0)return ret;usleep_range(10000, 20000);printk("JD9165: START OF LCD INIT SEQUENCE \n");//ret = mipi_dsi_dcs_set_pixel_format(dsi, MIPI_DCS_PIXEL_FMT_24BIT << 4);//if (ret < 0) {//dev_err(dev, "failed to set pixel format: %d\n", ret);//return ret;//}mipi_dsi_generic_write(dsi, (u8[]){0x30, 0x00}, 2);mipi_dsi_generic_write(dsi, (u8[]){0xf7, 0x49,0x61,0x02,0x00}, 5);mipi_dsi_generic_write(dsi, (u8[]){0x30, 0x01}, 2);mipi_dsi_generic_write(dsi, (u8[]){0x04,0x0C}, 2);mipi_dsi_generic_write(dsi, (u8[]){0x05,0x00}, 2); //05=06(xhs) //0x01 for BISTmipi_dsi_generic_write(dsi, (u8[]){0x06,0x00}, 2);//06=80(xhs) // 0x40 for BISTmipi_dsi_generic_write(dsi, (u8[]){0x0B,0x11}, 2);//0x13=4lanes，0x12=3lanes，0x11=2lanes，0x10=1 lanes  mipi_dsi_generic_write(dsi, (u8[]){0x17,0x00}, 2);mipi_dsi_generic_write(dsi, (u8[]){0x20,0x04}, 2);//add //r_lansel_sel_reg=1, software charge lane must openmipi_dsi_generic_write(dsi, (u8[]){0x1F,0x00}, 2);//add hs_settle timemipi_dsi_generic_write(dsi, (u8[]){0x23,0x00}, 2);//add //close gasmipi_dsi_generic_write(dsi, (u8[]){0x25,0x19}, 2);mipi_dsi_generic_write(dsi, (u8[]){0x28,0x18}, 2);mipi_dsi_generic_write(dsi, (u8[]){0x29,0x04}, 2);//revcommipi_dsi_generic_write(dsi, (u8[]){0x2A,0x01}, 2);//revcommipi_dsi_generic_write(dsi, (u8[]){0x2B,0x04}, 2);//vcommipi_dsi_generic_write(dsi, (u8[]){0x2C,0x01}, 2);//vcommipi_dsi_generic_write(dsi, (u8[]){0x30, 0x02}, 2);mipi_dsi_generic_write(dsi, (u8[]){0x01,0x22}, 2);mipi_dsi_generic_write(dsi, (u8[]){0x03,0x12}, 2);mipi_dsi_generic_write(dsi, (u8[]){0x04,0x00}, 2);mipi_dsi_generic_write(dsi, (u8[]){0x05,0x64}, 2);mipi_dsi_generic_write(dsi, (u8[]){0x0A,0x08}, 2);mipi_dsi_generic_write(dsi, (u8[]){0x0B,0x0A,0x1A,0x0B,0x0D,0x0D,0x11,0x10,0x06,0x08,0x1F,0x1D}, 12);mipi_dsi_generic_write(dsi, (u8[]){0x0C,0x0D,0x0D,0x0D,0x0D,0x0D,0x0D,0x0D,0x0D,0x0D,0x0D,0x0D}, 12);mipi_dsi_generic_write(dsi, (u8[]){0x0D,0x16,0x1B,0x0B,0x0D,0x0D,0x11,0x10,0x07,0x09,0x1E,0x1C}, 12);mipi_dsi_generic_write(dsi, (u8[]){0x0E,0x0D,0x0D,0x0D,0x0D,0x0D,0x0D,0x0D,0x0D,0x0D,0x0D,0x0D}, 12);mipi_dsi_generic_write(dsi, (u8[]){0x0F,0x16,0x1B,0x0D,0x0B,0x0D,0x11,0x10,0x1C,0x1E,0x09,0x07}, 12);mipi_dsi_generic_write(dsi, (u8[]){0x10,0x0D,0x0D,0x0D,0x0D,0x0D,0x0D,0x0D,0x0D,0x0D,0x0D,0x0D}, 12);mipi_dsi_generic_write(dsi, (u8[]){0x11,0x0A,0x1A,0x0D,0x0B,0x0D,0x11,0x10,0x1D,0x1F,0x08,0x06}, 12);mipi_dsi_generic_write(dsi, (u8[]){0x12,0x0D,0x0D,0x0D,0x0D,0x0D,0x0D,0x0D,0x0D,0x0D,0x0D,0x0D}, 12);mipi_dsi_generic_write(dsi, (u8[]){0x14,0x00,0x00,0x11,0x11}, 5);  //CKV_OFFmipi_dsi_generic_write(dsi, (u8[]){0x18,0x99}, 2);mipi_dsi_generic_write(dsi, (u8[]){0x30, 0x06}, 2);mipi_dsi_generic_write(dsi, (u8[]){0x12, 0x36,0x2C,0x2E,0x3C,0x38,0x35,0x35,0x32,0x2E,0x1D,0x2B,0x21,0x16,0x29}, 15);mipi_dsi_generic_write(dsi, (u8[]){0x13, 0x36,0x2C,0x2E,0x3C,0x38,0x35,0x35,0x32,0x2E,0x1D,0x2B,0x21,0x16,0x29}, 15);mipi_dsi_generic_write(dsi, (u8[]){0x30, 0x0A}, 2);mipi_dsi_generic_write(dsi, (u8[]){0x02,0x4F}, 2);mipi_dsi_generic_write(dsi, (u8[]){0x0B,0x40}, 2);mipi_dsi_generic_write(dsi, (u8[]){0x12,0x3E}, 2);mipi_dsi_generic_write(dsi, (u8[]){0x13,0x78}, 2);mipi_dsi_generic_write(dsi, (u8[]){0x30, 0x0D}, 2);mipi_dsi_generic_write(dsi, (u8[]){0x0D,0x04}, 2); //0x0C, 0x04mipi_dsi_generic_write(dsi, (u8[]){0x10,0x0C}, 2);mipi_dsi_generic_write(dsi, (u8[]){0x11,0x0C}, 2);mipi_dsi_generic_write(dsi, (u8[]){0x12,0x0C}, 2);mipi_dsi_generic_write(dsi, (u8[]){0x13,0x0C}, 2);mipi_dsi_generic_write(dsi, (u8[]){0x30, 0x00}, 2);mipi_dsi_generic_write(dsi, (u8[]){0x11}, 1); //exit z sleepmodemdelay(120);printk("JD9165: END OF INIT SEQUENCE DISPLAY \n");mipi_dsi_generic_write(dsi, (u8[]){0x29}, 1); //display onmdelay(20);return 0;}static int jdi_panel_on(struct jdi_panel *jdi){struct mipi_dsi_device *dsi = jdi->dsi;struct device *dev = &jdi->dsi->dev;int ret;dsi->mode_flags |= MIPI_DSI_MODE_LPM;ret = mipi_dsi_dcs_set_display_on(dsi);if (ret < 0)dev_err(dev, "failed to set display on: %d\n", ret);return ret;}static void jdi_panel_off(struct jdi_panel *jdi){struct mipi_dsi_device *dsi = jdi->dsi;struct device *dev = &jdi->dsi->dev;int ret;dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;ret = mipi_dsi_dcs_set_display_off(dsi);if (ret < 0)dev_err(dev, "failed to set display off: %d\n", ret);ret = mipi_dsi_dcs_enter_sleep_mode(dsi);if (ret < 0)dev_err(dev, "failed to enter sleep mode: %d\n", ret);msleep(100);}static int jdi_panel_disable(struct drm_panel *panel){struct jdi_panel *jdi = to_jdi_panel(panel);backlight_disable(jdi->backlight);return 0;}static int jdi_panel_unprepare(struct drm_panel *panel){struct jdi_panel *jdi = to_jdi_panel(panel);struct device *dev = &jdi->dsi->dev;int ret;jdi_panel_off(jdi);gpiod_set_value_cansleep(jdi->enable_gpio, 0);gpiod_set_value_cansleep(jdi->reset_gpio, 1);gpiod_set_value_cansleep(jdi->dcdc_en_gpio, 0);return 0;}static int jdi_panel_prepare(struct drm_panel *panel){return 0;}static int jdi_panel_enable(struct drm_panel *panel){struct jdi_panel *jdi = to_jdi_panel(panel);struct device *dev = &jdi->dsi->dev;int ret;gpiod_set_value_cansleep(jdi->reset_gpio, 1);usleep_range(10, 20);msleep(20);gpiod_set_value_cansleep(jdi->dcdc_en_gpio, 1);usleep_range(10, 20);gpiod_set_value_cansleep(jdi->reset_gpio, 0);usleep_range(10, 20);gpiod_set_value_cansleep(jdi->enable_gpio, 1);usleep_range(10, 20);ret = jdi_panel_init(jdi);if (ret < 0) {dev_err(dev, "failed to init panel: %d\n", ret);}ret = jdi_panel_on(jdi);if (ret < 0) {dev_err(dev, "failed to set panel on: %d\n", ret);}return 0;}static const struct drm_display_mode default_mode = {.clock = 50000,.hdisplay    = 1024,.hsync_start = 1024 + 160,               // hdisplay + hsync_front_porch.hsync_end   = 1024 + 160 + 40,          // hsync_start + hsync_pulse_width.htotal      = 1024 + 160 + 40 + 160,    // full line.vdisplay    = 600,.vsync_start = 600 + 12,                 // vdisplay + vsync_front_porch.vsync_end   = 600 + 12 + 10,            // vsync_start + vsync_pulse_width.vtotal      = 600 + 12 + 10 + 23,       // full frame};static int jdi_panel_get_modes(struct drm_panel *panel,       struct drm_connector *connector){struct drm_display_mode *mode;struct jdi_panel *jdi = to_jdi_panel(panel);struct device *dev = &jdi->dsi->dev;mode = drm_mode_duplicate(connector->dev, &default_mode);if (!mode) {dev_err(dev, "failed to add mode %ux%ux@%u\n",default_mode.hdisplay, default_mode.vdisplay,drm_mode_vrefresh(&default_mode));return -ENOMEM;}drm_mode_set_name(mode);drm_mode_probed_add(connector, mode);connector->display_info.width_mm = 95;connector->display_info.height_mm = 151;return 1;}static int dsi_dcs_bl_get_brightness(struct backlight_device *bl){struct mipi_dsi_device *dsi = bl_get_data(bl);int ret;u16 brightness = bl->props.brightness;dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;ret = mipi_dsi_dcs_get_display_brightness(dsi, &brightness);if (ret < 0)return ret;dsi->mode_flags |= MIPI_DSI_MODE_LPM;return brightness & 0xff;}static int dsi_dcs_bl_update_status(struct backlight_device *bl){struct mipi_dsi_device *dsi = bl_get_data(bl);int ret;dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;ret = mipi_dsi_dcs_set_display_brightness(dsi, bl->props.brightness);if (ret < 0)return ret;dsi->mode_flags |= MIPI_DSI_MODE_LPM;return 0;}static const struct backlight_ops dsi_bl_ops = {.update_status = dsi_dcs_bl_update_status,.get_brightness = dsi_dcs_bl_get_brightness,};static struct backlight_device *drm_panel_create_dsi_backlight(struct mipi_dsi_device *dsi){struct device *dev = &dsi->dev;struct backlight_properties props;memset(&props, 0, sizeof(props));props.type = BACKLIGHT_RAW;props.brightness = 255;props.max_brightness = 255;return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,      &dsi_bl_ops, &props);}static const struct drm_panel_funcs jdi_panel_funcs = {.disable = jdi_panel_disable,.unprepare = jdi_panel_unprepare,.prepare = jdi_panel_prepare,.enable = jdi_panel_enable,.get_modes = jdi_panel_get_modes,};static const struct of_device_id jdi_of_match[] = {{ .compatible = "jdi,lt070me05000", },{ }};MODULE_DEVICE_TABLE(of, jdi_of_match);static int jdi_panel_add(struct jdi_panel *jdi){struct device *dev = &jdi->dsi->dev;int ret;unsigned int i;jdi->mode = &default_mode;jdi->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);if (IS_ERR(jdi->enable_gpio)) {return dev_err_probe(dev, PTR_ERR(jdi->enable_gpio),     "cannot get enable-gpio %d\n", ret);}jdi->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);if (IS_ERR(jdi->reset_gpio))return dev_err_probe(dev, PTR_ERR(jdi->reset_gpio),     "cannot get reset-gpios %d\n", ret);jdi->dcdc_en_gpio = devm_gpiod_get(dev, "dcdc-en", GPIOD_OUT_LOW);if (IS_ERR(jdi->dcdc_en_gpio))return dev_err_probe(dev, PTR_ERR(jdi->dcdc_en_gpio),     "cannot get dcdc-en-gpio %d\n", ret);jdi->backlight = drm_panel_create_dsi_backlight(jdi->dsi);if (IS_ERR(jdi->backlight))return dev_err_probe(dev, PTR_ERR(jdi->backlight),     "failed to register backlight %d\n", ret);jdi->base.prepare_prev_first = true;drm_panel_init(&jdi->base, &jdi->dsi->dev, &jdi_panel_funcs,       DRM_MODE_CONNECTOR_DSI);drm_panel_add(&jdi->base);return 0;}static void jdi_panel_del(struct jdi_panel *jdi){if (jdi->base.dev)drm_panel_remove(&jdi->base);}static int jdi_panel_probe(struct mipi_dsi_device *dsi){struct jdi_panel *jdi;int ret;dsi->lanes = 2;dsi->format = MIPI_DSI_FMT_RGB888;dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_CLOCK_NON_CONTINUOUS;jdi = devm_kzalloc(&dsi->dev, sizeof(*jdi), GFP_KERNEL);if (!jdi)return -ENOMEM;mipi_dsi_set_drvdata(dsi, jdi);jdi->dsi = dsi;ret = jdi_panel_add(jdi);if (ret < 0)return ret;ret = mipi_dsi_attach(dsi);if (ret < 0) {jdi_panel_del(jdi);return ret;}return 0;}static void jdi_panel_remove(struct mipi_dsi_device *dsi){struct jdi_panel *jdi = mipi_dsi_get_drvdata(dsi);int ret;ret = mipi_dsi_detach(dsi);if (ret < 0)dev_err(&dsi->dev, "failed to detach from DSI host: %d\n",ret);jdi_panel_del(jdi);}static struct mipi_dsi_driver jdi_panel_driver = {.driver = {.name = "panel-jdi-lt070me05000",.of_match_table = jdi_of_match,},.probe = jdi_panel_probe,.remove = jdi_panel_remove,};module_mipi_dsi_driver(jdi_panel_driver);MODULE_AUTHOR("Sumit Semwal <sumit.semwal@linaro.org>");MODULE_AUTHOR("Vinay Simha BN <simhavcs@gmail.com>");MODULE_DESCRIPTION("JDI LT070ME05000 WUXGA");MODULE_LICENSE("GPL v2");

Code:

/* * Device Tree overlay to connect a JDI LT070ME05000 DSI panel to DSI1. * This uses 4 DSI data lanes, so can only be used with a Compute Module. * * The overlay is for V2 of Harlab's interface board that uses a PCA9536 to * handle the panel's control GPIOs instead of wiring it back to Pi GPIOs. * * Credit to Andrey Vostrukhin of Harlab for the overlay. * * Refer to https://github.com/harlab/CM4_LCD_LT070ME05000 for schematics and * other documentation. *//dts-v1/;/plugin/;/ {compatible = "brcm,bcm2711";fragment@0 {target = <&i2c_csi_dsi>;__overlay__ {#address-cells = <1>;#size-cells = <0>;status = "okay";pca: pca@41 {compatible = "nxp,pca9536";reg = <0x41>;gpio-controller;#gpio-cells = <2>;status = "okay";};};};fragment@1 {target = <&dsi0>;__overlay__{status = "okay";#address-cells = <1>;#size-cells = <0>;port {dsi_out_port:endpoint {remote-endpoint = <&panel_dsi_port>;};};lt070me05000:lt070me05000@0 {compatible    = "jdi,lt070me05000";status        = "okay";reg           = <0>;reset-gpios   = <&gpio 8 1>;   // LCD RSTenable-gpios  = <&gpio 12 0>; // Backlightdcdc-en-gpios = <&gpio 24 0>;port {panel_dsi_port: endpoint {remote-endpoint = <&dsi_out_port>;};};};};};};