Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Vinay Simha BN | 2241 | 98.12% | 1 | 7.14% |
Brian Norris | 7 | 0.31% | 1 | 7.14% |
Laurent Pinchart | 7 | 0.31% | 2 | 14.29% |
Caleb Connolly | 6 | 0.26% | 1 | 7.14% |
Thierry Reding | 5 | 0.22% | 1 | 7.14% |
Sam Ravnborg | 5 | 0.22% | 2 | 14.29% |
Ville Syrjälä | 4 | 0.18% | 1 | 7.14% |
Eric Anholt | 3 | 0.13% | 1 | 7.14% |
Meghana Madhyastha | 2 | 0.09% | 1 | 7.14% |
Thomas Gleixner | 2 | 0.09% | 1 | 7.14% |
Uwe Kleine-König | 1 | 0.04% | 1 | 7.14% |
Bernard Zhao | 1 | 0.04% | 1 | 7.14% |
Total | 2284 | 14 |
// 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> * * From internet archives, the panel for Nexus 7 2nd Gen, 2013 model is a * JDI model LT070ME05000, and its data sheet is at: * http://panelone.net/en/7-0-inch/JDI_LT070ME05000_7.0_inch-datasheet */ #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> static const char * const regulator_names[] = { "vddp", "iovcc" }; struct jdi_panel { struct drm_panel base; struct mipi_dsi_device *dsi; struct regulator_bulk_data supplies[ARRAY_SIZE(regulator_names)]; struct gpio_desc *enable_gpio; struct gpio_desc *reset_gpio; struct gpio_desc *dcdc_en_gpio; struct backlight_device *backlight; bool prepared; bool enabled; 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); 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; } ret = mipi_dsi_dcs_set_column_address(dsi, 0, jdi->mode->hdisplay - 1); if (ret < 0) { dev_err(dev, "failed to set column address: %d\n", ret); return ret; } ret = mipi_dsi_dcs_set_page_address(dsi, 0, jdi->mode->vdisplay - 1); if (ret < 0) { dev_err(dev, "failed to set page address: %d\n", ret); return ret; } /* * BIT(5) BCTRL = 1 Backlight Control Block On, Brightness registers * are active * BIT(3) BL = 1 Backlight Control On * BIT(2) DD = 0 Display Dimming is Off */ ret = mipi_dsi_dcs_write(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY, (u8[]){ 0x24 }, 1); if (ret < 0) { dev_err(dev, "failed to write control display: %d\n", ret); return ret; } /* CABC off */ ret = mipi_dsi_dcs_write(dsi, MIPI_DCS_WRITE_POWER_SAVE, (u8[]){ 0x00 }, 1); if (ret < 0) { dev_err(dev, "failed to set cabc off: %d\n", ret); return ret; } ret = mipi_dsi_dcs_exit_sleep_mode(dsi); if (ret < 0) { dev_err(dev, "failed to set exit sleep mode: %d\n", ret); return ret; } msleep(120); ret = mipi_dsi_generic_write(dsi, (u8[]){0xB0, 0x00}, 2); if (ret < 0) { dev_err(dev, "failed to set mcap: %d\n", ret); return ret; } mdelay(10); /* Interface setting, video mode */ ret = mipi_dsi_generic_write(dsi, (u8[]) {0xB3, 0x26, 0x08, 0x00, 0x20, 0x00}, 6); if (ret < 0) { dev_err(dev, "failed to set display interface setting: %d\n" , ret); return ret; } mdelay(20); ret = mipi_dsi_generic_write(dsi, (u8[]){0xB0, 0x03}, 2); if (ret < 0) { dev_err(dev, "failed to set default values for mcap: %d\n" , ret); return ret; } 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); if (!jdi->enabled) return 0; backlight_disable(jdi->backlight); jdi->enabled = false; 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; if (!jdi->prepared) return 0; jdi_panel_off(jdi); ret = regulator_bulk_disable(ARRAY_SIZE(jdi->supplies), jdi->supplies); if (ret < 0) dev_err(dev, "regulator disable failed, %d\n", ret); gpiod_set_value(jdi->enable_gpio, 0); gpiod_set_value(jdi->reset_gpio, 1); gpiod_set_value(jdi->dcdc_en_gpio, 0); jdi->prepared = false; return 0; } static int jdi_panel_prepare(struct drm_panel *panel) { struct jdi_panel *jdi = to_jdi_panel(panel); struct device *dev = &jdi->dsi->dev; int ret; if (jdi->prepared) return 0; ret = regulator_bulk_enable(ARRAY_SIZE(jdi->supplies), jdi->supplies); if (ret < 0) { dev_err(dev, "regulator enable failed, %d\n", ret); return ret; } msleep(20); gpiod_set_value(jdi->dcdc_en_gpio, 1); usleep_range(10, 20); gpiod_set_value(jdi->reset_gpio, 0); usleep_range(10, 20); gpiod_set_value(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); goto poweroff; } ret = jdi_panel_on(jdi); if (ret < 0) { dev_err(dev, "failed to set panel on: %d\n", ret); goto poweroff; } jdi->prepared = true; return 0; poweroff: ret = regulator_bulk_disable(ARRAY_SIZE(jdi->supplies), jdi->supplies); if (ret < 0) dev_err(dev, "regulator disable failed, %d\n", ret); gpiod_set_value(jdi->enable_gpio, 0); gpiod_set_value(jdi->reset_gpio, 1); gpiod_set_value(jdi->dcdc_en_gpio, 0); return ret; } static int jdi_panel_enable(struct drm_panel *panel) { struct jdi_panel *jdi = to_jdi_panel(panel); if (jdi->enabled) return 0; backlight_enable(jdi->backlight); jdi->enabled = true; return 0; } static const struct drm_display_mode default_mode = { .clock = 155493, .hdisplay = 1200, .hsync_start = 1200 + 48, .hsync_end = 1200 + 48 + 32, .htotal = 1200 + 48 + 32 + 60, .vdisplay = 1920, .vsync_start = 1920 + 3, .vsync_end = 1920 + 3 + 5, .vtotal = 1920 + 3 + 5 + 6, .flags = 0, }; 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; for (i = 0; i < ARRAY_SIZE(jdi->supplies); i++) jdi->supplies[i].supply = regulator_names[i]; ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(jdi->supplies), jdi->supplies); if (ret < 0) { dev_err(dev, "failed to init regulator, ret=%d\n", ret); return ret; } jdi->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW); if (IS_ERR(jdi->enable_gpio)) { ret = PTR_ERR(jdi->enable_gpio); dev_err(dev, "cannot get enable-gpio %d\n", ret); return ret; } jdi->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); if (IS_ERR(jdi->reset_gpio)) { ret = PTR_ERR(jdi->reset_gpio); dev_err(dev, "cannot get reset-gpios %d\n", ret); return ret; } jdi->dcdc_en_gpio = devm_gpiod_get(dev, "dcdc-en", GPIOD_OUT_LOW); if (IS_ERR(jdi->dcdc_en_gpio)) { ret = PTR_ERR(jdi->dcdc_en_gpio); dev_err(dev, "cannot get dcdc-en-gpio %d\n", ret); return ret; } jdi->backlight = drm_panel_create_dsi_backlight(jdi->dsi); if (IS_ERR(jdi->backlight)) { ret = PTR_ERR(jdi->backlight); dev_err(dev, "failed to register backlight %d\n", ret); return ret; } 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 = 4; dsi->format = MIPI_DSI_FMT_RGB888; dsi->mode_flags = MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_VIDEO | 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 = jdi_panel_disable(&jdi->base); if (ret < 0) dev_err(&dsi->dev, "failed to disable panel: %d\n", 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 void jdi_panel_shutdown(struct mipi_dsi_device *dsi) { struct jdi_panel *jdi = mipi_dsi_get_drvdata(dsi); jdi_panel_disable(&jdi->base); } 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, .shutdown = jdi_panel_shutdown, }; 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");
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