1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2024 BayLibre, SAS 4 * Author: Jerome Brunet <jbrunet@baylibre.com> 5 */ 6 7 #include <linux/gpio/consumer.h> 8 #include <linux/module.h> 9 #include <linux/of.h> 10 #include <linux/regulator/consumer.h> 11 12 #include <video/mipi_display.h> 13 14 #include <drm/drm_device.h> 15 #include <drm/drm_probe_helper.h> 16 #include <drm/drm_mipi_dsi.h> 17 #include <drm/drm_modes.h> 18 #include <drm/drm_panel.h> 19 20 struct lincoln_lcd197_panel { 21 struct drm_panel panel; 22 struct mipi_dsi_device *dsi; 23 struct regulator *supply; 24 struct gpio_desc *enable_gpio; 25 struct gpio_desc *reset_gpio; 26 }; 27 28 static inline 29 struct lincoln_lcd197_panel *to_lincoln_lcd197_panel(struct drm_panel *panel) 30 { 31 return container_of(panel, struct lincoln_lcd197_panel, panel); 32 } 33 34 static int lincoln_lcd197_panel_prepare(struct drm_panel *panel) 35 { 36 struct lincoln_lcd197_panel *lcd = to_lincoln_lcd197_panel(panel); 37 struct mipi_dsi_multi_context ctx = { .dsi = lcd->dsi }; 38 int err; 39 40 gpiod_set_value_cansleep(lcd->enable_gpio, 0); 41 err = regulator_enable(lcd->supply); 42 if (err < 0) 43 return err; 44 45 gpiod_set_value_cansleep(lcd->enable_gpio, 1); 46 usleep_range(1000, 2000); 47 gpiod_set_value_cansleep(lcd->reset_gpio, 1); 48 usleep_range(5000, 6000); 49 gpiod_set_value_cansleep(lcd->reset_gpio, 0); 50 msleep(50); 51 52 mipi_dsi_dcs_write_seq_multi(&ctx, 0xb9, 0xff, 0x83, 0x99); 53 mipi_dsi_dcs_write_seq_multi(&ctx, 0xd2, 0x55); 54 mipi_dsi_dcs_write_seq_multi(&ctx, 0xb1, 0x02, 0x04, 0x70, 0x90, 0x01, 55 0x32, 0x33, 0x11, 0x11, 0x4d, 0x57, 0x56, 0x73, 56 0x02, 0x02); 57 mipi_dsi_dcs_write_seq_multi(&ctx, 0xb2, 0x00, 0x80, 0x80, 0xae, 0x0a, 58 0x0e, 0x75, 0x11, 0x00, 0x00, 0x00); 59 mipi_dsi_dcs_write_seq_multi(&ctx, 0xb4, 0x00, 0xff, 0x04, 0xa4, 0x02, 60 0xa0, 0x00, 0x00, 0x10, 0x00, 0x00, 0x02, 0x00, 61 0x24, 0x02, 0x04, 0x0a, 0x21, 0x03, 0x00, 0x00, 62 0x08, 0xa6, 0x88, 0x04, 0xa4, 0x02, 0xa0, 0x00, 63 0x00, 0x10, 0x00, 0x00, 0x02, 0x00, 0x24, 0x02, 64 0x04, 0x0a, 0x00, 0x00, 0x08, 0xa6, 0x00, 0x08, 65 0x11); 66 mipi_dsi_dcs_write_seq_multi(&ctx, 0xd3, 0x00, 0x00, 0x00, 0x00, 0x00, 67 0x00, 0x18, 0x18, 0x32, 0x10, 0x09, 0x00, 0x09, 68 0x32, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 69 0x00, 0x00, 0x11, 0x00, 0x02, 0x02, 0x03, 0x00, 70 0x00, 0x00, 0x0a, 0x40); 71 mipi_dsi_dcs_write_seq_multi(&ctx, 0xd5, 0x18, 0x18, 0x18, 0x18, 0x21, 72 0x20, 0x18, 0x18, 0x19, 0x19, 0x19, 0x19, 0x18, 73 0x18, 0x18, 0x18, 0x03, 0x02, 0x01, 0x00, 0x2f, 74 0x2f, 0x30, 0x30, 0x31, 0x31, 0x18, 0x18, 0x18, 75 0x18, 0x18, 0x18); 76 mipi_dsi_dcs_write_seq_multi(&ctx, 0xd6, 0x18, 0x18, 0x18, 0x18, 0x20, 77 0x21, 0x19, 0x19, 0x18, 0x18, 0x19, 0x19, 0x18, 78 0x18, 0x18, 0x18, 0x00, 0x01, 0x02, 0x03, 0x2f, 79 0x2f, 0x30, 0x30, 0x31, 0x31, 0x18, 0x18, 0x18, 80 0x18, 0x18, 0x18); 81 mipi_dsi_dcs_write_seq_multi(&ctx, 0xbd, 0x01); 82 mipi_dsi_dcs_write_seq_multi(&ctx, 0xd8, 0x0a, 0xbe, 0xfa, 0xa0, 0x0a, 83 0xbe, 0xfa, 0xa0); 84 mipi_dsi_dcs_write_seq_multi(&ctx, 0xd8, 0x0f, 0xff, 0xff, 0xe0, 0x0f, 85 0xff, 0xff, 0xe0); 86 mipi_dsi_dcs_write_seq_multi(&ctx, 0xbd, 0x02); 87 mipi_dsi_dcs_write_seq_multi(&ctx, 0xd8, 0x0f, 0xff, 0xff, 0xe0, 0x0f, 88 0xff, 0xff, 0xe0); 89 mipi_dsi_dcs_write_seq_multi(&ctx, 0xe0, 0x01, 0x11, 0x1c, 0x17, 0x39, 90 0x43, 0x54, 0x51, 0x5a, 0x64, 0x6c, 0x74, 0x7a, 91 0x83, 0x8d, 0x92, 0x99, 0xa4, 0xa9, 0xb4, 0xaa, 92 0xba, 0xbe, 0x63, 0x5e, 0x69, 0x73, 0x01, 0x11, 93 0x1c, 0x17, 0x39, 0x43, 0x54, 0x51, 0x5a, 0x64, 94 0x6c, 0x74, 0x7a, 0x83, 0x8d, 0x92, 0x99, 0xa4, 95 0xa7, 0xb2, 0xa9, 0xba, 0xbe, 0x63, 0x5e, 0x69, 96 0x73); 97 mipi_dsi_usleep_range(&ctx, 200, 300); 98 mipi_dsi_dcs_write_seq_multi(&ctx, 0xb6, 0x92, 0x92); 99 mipi_dsi_dcs_write_seq_multi(&ctx, 0xcc, 0x00); 100 mipi_dsi_dcs_write_seq_multi(&ctx, 0xbf, 0x40, 0x41, 0x50, 0x49); 101 mipi_dsi_dcs_write_seq_multi(&ctx, 0xc6, 0xff, 0xf9); 102 mipi_dsi_dcs_write_seq_multi(&ctx, 0xc0, 0x25, 0x5a); 103 mipi_dsi_dcs_write_seq_multi(&ctx, MIPI_DCS_SET_ADDRESS_MODE, 0x02); 104 mipi_dsi_dcs_exit_sleep_mode_multi(&ctx); 105 mipi_dsi_msleep(&ctx, 120); 106 107 if (ctx.accum_err) { 108 gpiod_set_value_cansleep(lcd->enable_gpio, 0); 109 gpiod_set_value_cansleep(lcd->reset_gpio, 1); 110 regulator_disable(lcd->supply); 111 } 112 113 return ctx.accum_err; 114 } 115 116 static int lincoln_lcd197_panel_unprepare(struct drm_panel *panel) 117 { 118 struct lincoln_lcd197_panel *lcd = to_lincoln_lcd197_panel(panel); 119 struct mipi_dsi_multi_context ctx = { .dsi = lcd->dsi }; 120 121 mipi_dsi_dcs_enter_sleep_mode_multi(&ctx); 122 mipi_dsi_usleep_range(&ctx, 5000, 6000); 123 gpiod_set_value_cansleep(lcd->enable_gpio, 0); 124 gpiod_set_value_cansleep(lcd->reset_gpio, 1); 125 regulator_disable(lcd->supply); 126 127 return ctx.accum_err; 128 } 129 130 static int lincoln_lcd197_panel_enable(struct drm_panel *panel) 131 { 132 struct lincoln_lcd197_panel *lcd = to_lincoln_lcd197_panel(panel); 133 struct mipi_dsi_multi_context ctx = { .dsi = lcd->dsi }; 134 135 mipi_dsi_dcs_set_display_on_multi(&ctx); 136 mipi_dsi_msleep(&ctx, 20); 137 138 return ctx.accum_err; 139 } 140 141 static int lincoln_lcd197_panel_disable(struct drm_panel *panel) 142 { 143 struct lincoln_lcd197_panel *lcd = to_lincoln_lcd197_panel(panel); 144 struct mipi_dsi_multi_context ctx = { .dsi = lcd->dsi }; 145 146 mipi_dsi_dcs_set_display_off_multi(&ctx); 147 mipi_dsi_msleep(&ctx, 50); 148 149 return ctx.accum_err; 150 } 151 152 static const struct drm_display_mode lcd197_mode = { 153 .clock = 154002, 154 .hdisplay = 1080, 155 .hsync_start = 1080 + 20, 156 .hsync_end = 1080 + 20 + 6, 157 .htotal = 1080 + 204, 158 .vdisplay = 1920, 159 .vsync_start = 1920 + 4, 160 .vsync_end = 1920 + 4 + 4, 161 .vtotal = 1920 + 79, 162 .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC, 163 .width_mm = 79, 164 .height_mm = 125, 165 .type = DRM_MODE_TYPE_DRIVER, 166 }; 167 168 static int lincoln_lcd197_panel_get_modes(struct drm_panel *panel, 169 struct drm_connector *connector) 170 { 171 return drm_connector_helper_get_modes_fixed(connector, &lcd197_mode); 172 } 173 174 static const struct drm_panel_funcs lincoln_lcd197_panel_funcs = { 175 .prepare = lincoln_lcd197_panel_prepare, 176 .unprepare = lincoln_lcd197_panel_unprepare, 177 .enable = lincoln_lcd197_panel_enable, 178 .disable = lincoln_lcd197_panel_disable, 179 .get_modes = lincoln_lcd197_panel_get_modes, 180 }; 181 182 static int lincoln_lcd197_panel_probe(struct mipi_dsi_device *dsi) 183 { 184 struct lincoln_lcd197_panel *lcd; 185 struct device *dev = &dsi->dev; 186 int err; 187 188 dsi->lanes = 4; 189 dsi->format = MIPI_DSI_FMT_RGB888; 190 dsi->mode_flags = (MIPI_DSI_MODE_VIDEO | 191 MIPI_DSI_MODE_VIDEO_BURST); 192 193 lcd = devm_kzalloc(&dsi->dev, sizeof(*lcd), GFP_KERNEL); 194 if (!lcd) 195 return -ENOMEM; 196 197 mipi_dsi_set_drvdata(dsi, lcd); 198 lcd->dsi = dsi; 199 200 lcd->supply = devm_regulator_get(dev, "power"); 201 if (IS_ERR(lcd->supply)) 202 return dev_err_probe(dev, PTR_ERR(lcd->supply), 203 "failed to get power supply"); 204 205 lcd->enable_gpio = devm_gpiod_get(dev, "enable", 206 GPIOD_OUT_HIGH); 207 if (IS_ERR(lcd->enable_gpio)) 208 return dev_err_probe(dev, PTR_ERR(lcd->enable_gpio), 209 "failed to get enable gpio"); 210 211 lcd->reset_gpio = devm_gpiod_get(dev, "reset", 212 GPIOD_OUT_HIGH); 213 if (IS_ERR(lcd->reset_gpio)) 214 return dev_err_probe(dev, PTR_ERR(lcd->reset_gpio), 215 "failed to get reset gpio"); 216 217 drm_panel_init(&lcd->panel, dev, 218 &lincoln_lcd197_panel_funcs, DRM_MODE_CONNECTOR_DSI); 219 220 err = drm_panel_of_backlight(&lcd->panel); 221 if (err) 222 return err; 223 224 drm_panel_add(&lcd->panel); 225 err = mipi_dsi_attach(dsi); 226 if (err) 227 drm_panel_remove(&lcd->panel); 228 229 return err; 230 } 231 232 static void lincoln_lcd197_panel_remove(struct mipi_dsi_device *dsi) 233 { 234 struct lincoln_lcd197_panel *lcd = mipi_dsi_get_drvdata(dsi); 235 int err; 236 237 err = mipi_dsi_detach(dsi); 238 if (err < 0) 239 dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", err); 240 241 drm_panel_remove(&lcd->panel); 242 } 243 244 static const struct of_device_id lincoln_lcd197_of_match[] = { 245 { .compatible = "lincolntech,lcd197", }, 246 { /* sentinel */ } 247 }; 248 MODULE_DEVICE_TABLE(of, lincoln_lcd197_of_match); 249 250 static struct mipi_dsi_driver lincoln_lcd197_panel_driver = { 251 .driver = { 252 .name = "panel-lincolntech-lcd197", 253 .of_match_table = lincoln_lcd197_of_match, 254 }, 255 .probe = lincoln_lcd197_panel_probe, 256 .remove = lincoln_lcd197_panel_remove, 257 }; 258 module_mipi_dsi_driver(lincoln_lcd197_panel_driver); 259 260 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>"); 261 MODULE_DESCRIPTION("Lincoln Technologies LCD197 panel driver"); 262 MODULE_LICENSE("GPL"); 263