| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Linus Walleij | 1631 | 99.94% | 1 | 50.00% |
| Uwe Kleine-König | 1 | 0.06% | 1 | 50.00% |
| Total | 1632 | 2 |
// SPDX-License-Identifier: GPL-2.0 /* * Panel driver for the Samsung LMS397KF04 480x800 DPI RGB panel. * According to the data sheet the display controller is called DB7430. * Found in the Samsung Galaxy Beam GT-I8350 mobile phone. * Linus Walleij <linus.walleij@linaro.org> */ #include <drm/drm_mipi_dbi.h> #include <drm/drm_modes.h> #include <drm/drm_panel.h> #include <linux/delay.h> #include <linux/gpio/consumer.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/media-bus-format.h> #include <linux/module.h> #include <linux/of.h> #include <linux/regulator/consumer.h> #include <linux/spi/spi.h> #include <video/mipi_display.h> #define DB7430_ACCESS_PROT_OFF 0xb0 #define DB7430_UNKNOWN_B4 0xb4 #define DB7430_USER_SELECT 0xb5 #define DB7430_UNKNOWN_B7 0xb7 #define DB7430_UNKNOWN_B8 0xb8 #define DB7430_PANEL_DRIVING 0xc0 #define DB7430_SOURCE_CONTROL 0xc1 #define DB7430_GATE_INTERFACE 0xc4 #define DB7430_DISPLAY_H_TIMING 0xc5 #define DB7430_RGB_SYNC_OPTION 0xc6 #define DB7430_GAMMA_SET_RED 0xc8 #define DB7430_GAMMA_SET_GREEN 0xc9 #define DB7430_GAMMA_SET_BLUE 0xca #define DB7430_BIAS_CURRENT_CTRL 0xd1 #define DB7430_DDV_CTRL 0xd2 #define DB7430_GAMMA_CTRL_REF 0xd3 #define DB7430_UNKNOWN_D4 0xd4 #define DB7430_DCDC_CTRL 0xd5 #define DB7430_VCL_CTRL 0xd6 #define DB7430_UNKNOWN_F8 0xf8 #define DB7430_UNKNOWN_FC 0xfc #define DATA_MASK 0x100 /** * struct db7430 - state container for a panel controlled by the DB7430 * controller */ struct db7430 { /** @dev: the container device */ struct device *dev; /** @dbi: the DBI bus abstraction handle */ struct mipi_dbi dbi; /** @panel: the DRM panel instance for this device */ struct drm_panel panel; /** @width: the width of this panel in mm */ u32 width; /** @height: the height of this panel in mm */ u32 height; /** @reset: reset GPIO line */ struct gpio_desc *reset; /** @regulators: VCCIO and VIO supply regulators */ struct regulator_bulk_data regulators[2]; }; static const struct drm_display_mode db7430_480_800_mode = { /* * 31 ns period min (htotal*vtotal*vrefresh)/1000 * gives a Vrefresh of ~71 Hz. */ .clock = 32258, .hdisplay = 480, .hsync_start = 480 + 10, .hsync_end = 480 + 10 + 4, .htotal = 480 + 10 + 4 + 40, .vdisplay = 800, .vsync_start = 800 + 6, .vsync_end = 800 + 6 + 1, .vtotal = 800 + 6 + 1 + 7, .width_mm = 53, .height_mm = 87, .flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC, }; static inline struct db7430 *to_db7430(struct drm_panel *panel) { return container_of(panel, struct db7430, panel); } static int db7430_power_on(struct db7430 *db) { struct mipi_dbi *dbi = &db->dbi; int ret; /* Power up */ ret = regulator_bulk_enable(ARRAY_SIZE(db->regulators), db->regulators); if (ret) { dev_err(db->dev, "failed to enable regulators: %d\n", ret); return ret; } msleep(50); /* Assert reset >=1 ms */ gpiod_set_value_cansleep(db->reset, 1); usleep_range(1000, 5000); /* De-assert reset */ gpiod_set_value_cansleep(db->reset, 0); /* Wait >= 10 ms */ msleep(10); dev_dbg(db->dev, "de-asserted RESET\n"); /* * This is set to 0x0a (RGB/BGR order + horizontal flip) in order * to make the display behave normally. If this is not set the displays * normal output behaviour is horizontally flipped and BGR ordered. Do * it twice because the first message doesn't always "take". */ mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, 0x0a); mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, 0x0a); mipi_dbi_command(dbi, DB7430_ACCESS_PROT_OFF, 0x00); mipi_dbi_command(dbi, DB7430_PANEL_DRIVING, 0x28, 0x08); mipi_dbi_command(dbi, DB7430_SOURCE_CONTROL, 0x01, 0x30, 0x15, 0x05, 0x22); mipi_dbi_command(dbi, DB7430_GATE_INTERFACE, 0x10, 0x01, 0x00); mipi_dbi_command(dbi, DB7430_DISPLAY_H_TIMING, 0x06, 0x55, 0x03, 0x07, 0x0b, 0x33, 0x00, 0x01, 0x03); /* * 0x00 in datasheet 0x01 in vendor code 0x00, it seems 0x01 means * DE active high and 0x00 means DE active low. */ mipi_dbi_command(dbi, DB7430_RGB_SYNC_OPTION, 0x01); mipi_dbi_command(dbi, DB7430_GAMMA_SET_RED, /* R positive gamma */ 0x00, 0x0A, 0x31, 0x3B, 0x4E, 0x58, 0x59, 0x5B, 0x58, 0x5E, 0x62, 0x60, 0x61, 0x5E, 0x62, 0x55, 0x55, 0x7F, 0x08, /* R negative gamma */ 0x00, 0x0A, 0x31, 0x3B, 0x4E, 0x58, 0x59, 0x5B, 0x58, 0x5E, 0x62, 0x60, 0x61, 0x5E, 0x62, 0x55, 0x55, 0x7F, 0x08); mipi_dbi_command(dbi, DB7430_GAMMA_SET_GREEN, /* G positive gamma */ 0x00, 0x25, 0x15, 0x28, 0x3D, 0x4A, 0x48, 0x4C, 0x4A, 0x52, 0x59, 0x59, 0x5B, 0x56, 0x60, 0x5D, 0x55, 0x7F, 0x0A, /* G negative gamma */ 0x00, 0x25, 0x15, 0x28, 0x3D, 0x4A, 0x48, 0x4C, 0x4A, 0x52, 0x59, 0x59, 0x5B, 0x56, 0x60, 0x5D, 0x55, 0x7F, 0x0A); mipi_dbi_command(dbi, DB7430_GAMMA_SET_BLUE, /* B positive gamma */ 0x00, 0x48, 0x10, 0x1F, 0x2F, 0x35, 0x38, 0x3D, 0x3C, 0x45, 0x4D, 0x4E, 0x52, 0x51, 0x60, 0x7F, 0x7E, 0x7F, 0x0C, /* B negative gamma */ 0x00, 0x48, 0x10, 0x1F, 0x2F, 0x35, 0x38, 0x3D, 0x3C, 0x45, 0x4D, 0x4E, 0x52, 0x51, 0x60, 0x7F, 0x7E, 0x7F, 0x0C); mipi_dbi_command(dbi, DB7430_BIAS_CURRENT_CTRL, 0x33, 0x13); mipi_dbi_command(dbi, DB7430_DDV_CTRL, 0x11, 0x00, 0x00); mipi_dbi_command(dbi, DB7430_GAMMA_CTRL_REF, 0x50, 0x50); mipi_dbi_command(dbi, DB7430_DCDC_CTRL, 0x2f, 0x11, 0x1e, 0x46); mipi_dbi_command(dbi, DB7430_VCL_CTRL, 0x11, 0x0a); return 0; } static int db7430_power_off(struct db7430 *db) { /* Go into RESET and disable regulators */ gpiod_set_value_cansleep(db->reset, 1); return regulator_bulk_disable(ARRAY_SIZE(db->regulators), db->regulators); } static int db7430_unprepare(struct drm_panel *panel) { return db7430_power_off(to_db7430(panel)); } static int db7430_disable(struct drm_panel *panel) { struct db7430 *db = to_db7430(panel); struct mipi_dbi *dbi = &db->dbi; mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF); msleep(25); mipi_dbi_command(dbi, MIPI_DCS_ENTER_SLEEP_MODE); msleep(120); return 0; } static int db7430_prepare(struct drm_panel *panel) { return db7430_power_on(to_db7430(panel)); } static int db7430_enable(struct drm_panel *panel) { struct db7430 *db = to_db7430(panel); struct mipi_dbi *dbi = &db->dbi; /* Exit sleep mode */ mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE); msleep(20); /* NVM (non-volatile memory) load sequence */ mipi_dbi_command(dbi, DB7430_UNKNOWN_D4, 0x52, 0x5e); mipi_dbi_command(dbi, DB7430_UNKNOWN_F8, 0x01, 0xf5, 0xf2, 0x71, 0x44); mipi_dbi_command(dbi, DB7430_UNKNOWN_FC, 0x00, 0x08); msleep(150); /* CABC turn on sequence (BC = backlight control) */ mipi_dbi_command(dbi, DB7430_UNKNOWN_B4, 0x0f, 0x00, 0x50); mipi_dbi_command(dbi, DB7430_USER_SELECT, 0x80); mipi_dbi_command(dbi, DB7430_UNKNOWN_B7, 0x24); mipi_dbi_command(dbi, DB7430_UNKNOWN_B8, 0x01); /* Turn on display */ mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON); return 0; } /** * db7430_get_modes() - return the mode * @panel: the panel to get the mode for * @connector: reference to the central DRM connector control structure */ static int db7430_get_modes(struct drm_panel *panel, struct drm_connector *connector) { struct db7430 *db = to_db7430(panel); struct drm_display_mode *mode; static const u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24; mode = drm_mode_duplicate(connector->dev, &db7430_480_800_mode); if (!mode) { dev_err(db->dev, "failed to add mode\n"); return -ENOMEM; } connector->display_info.bpc = 8; connector->display_info.width_mm = mode->width_mm; connector->display_info.height_mm = mode->height_mm; connector->display_info.bus_flags = DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE; drm_display_info_set_bus_formats(&connector->display_info, &bus_format, 1); drm_mode_set_name(mode); mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; drm_mode_probed_add(connector, mode); return 1; } static const struct drm_panel_funcs db7430_drm_funcs = { .disable = db7430_disable, .unprepare = db7430_unprepare, .prepare = db7430_prepare, .enable = db7430_enable, .get_modes = db7430_get_modes, }; static int db7430_probe(struct spi_device *spi) { struct device *dev = &spi->dev; struct db7430 *db; int ret; db = devm_kzalloc(dev, sizeof(*db), GFP_KERNEL); if (!db) return -ENOMEM; db->dev = dev; /* * VCI is the analog voltage supply * VCCIO is the digital I/O voltage supply */ db->regulators[0].supply = "vci"; db->regulators[1].supply = "vccio"; ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(db->regulators), db->regulators); if (ret) return dev_err_probe(dev, ret, "failed to get regulators\n"); db->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); if (IS_ERR(db->reset)) { ret = PTR_ERR(db->reset); return dev_err_probe(dev, ret, "no RESET GPIO\n"); } ret = mipi_dbi_spi_init(spi, &db->dbi, NULL); if (ret) return dev_err_probe(dev, ret, "MIPI DBI init failed\n"); drm_panel_init(&db->panel, dev, &db7430_drm_funcs, DRM_MODE_CONNECTOR_DPI); /* FIXME: if no external backlight, use internal backlight */ ret = drm_panel_of_backlight(&db->panel); if (ret) return dev_err_probe(dev, ret, "failed to add backlight\n"); spi_set_drvdata(spi, db); drm_panel_add(&db->panel); dev_dbg(dev, "added panel\n"); return 0; } static void db7430_remove(struct spi_device *spi) { struct db7430 *db = spi_get_drvdata(spi); drm_panel_remove(&db->panel); } /* * The DB7430 display controller may be used in several display products, * so list the different variants here and add per-variant data if needed. */ static const struct of_device_id db7430_match[] = { { .compatible = "samsung,lms397kf04", }, {}, }; MODULE_DEVICE_TABLE(of, db7430_match); static struct spi_driver db7430_driver = { .probe = db7430_probe, .remove = db7430_remove, .driver = { .name = "db7430-panel", .of_match_table = db7430_match, }, }; module_spi_driver(db7430_driver); MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>"); MODULE_DESCRIPTION("Samsung DB7430 panel driver"); MODULE_LICENSE("GPL v2");
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