1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * BOE BF060Y8M-AJ0 5.99" MIPI-DSI OLED Panel on SW43404 DriverIC 4 * 5 * Copyright (c) 2020 AngeloGioacchino Del Regno 6 * <angelogioacchino.delregno@somainline.org> 7 */ 8 9 #include <linux/backlight.h> 10 #include <linux/delay.h> 11 #include <linux/gpio/consumer.h> 12 #include <linux/module.h> 13 #include <linux/of.h> 14 #include <linux/regulator/consumer.h> 15 #include <video/mipi_display.h> 16 #include <drm/drm_mipi_dsi.h> 17 #include <drm/drm_modes.h> 18 #include <drm/drm_panel.h> 19 20 #define DCS_ALLOW_HBM_RANGE 0x0c 21 #define DCS_DISALLOW_HBM_RANGE 0x08 22 23 enum boe_bf060y8m_aj0_supplies { 24 BF060Y8M_VREG_VCC, 25 BF060Y8M_VREG_VDDIO, 26 BF060Y8M_VREG_VCI, 27 BF060Y8M_VREG_EL_VDD, 28 BF060Y8M_VREG_EL_VSS, 29 BF060Y8M_VREG_MAX 30 }; 31 32 struct boe_bf060y8m_aj0 { 33 struct drm_panel panel; 34 struct mipi_dsi_device *dsi; 35 struct regulator_bulk_data vregs[BF060Y8M_VREG_MAX]; 36 struct gpio_desc *reset_gpio; 37 }; 38 39 static inline 40 struct boe_bf060y8m_aj0 *to_boe_bf060y8m_aj0(struct drm_panel *panel) 41 { 42 return container_of(panel, struct boe_bf060y8m_aj0, panel); 43 } 44 45 static void boe_bf060y8m_aj0_reset(struct boe_bf060y8m_aj0 *boe) 46 { 47 gpiod_set_value_cansleep(boe->reset_gpio, 0); 48 usleep_range(2000, 3000); 49 gpiod_set_value_cansleep(boe->reset_gpio, 1); 50 usleep_range(15000, 16000); 51 gpiod_set_value_cansleep(boe->reset_gpio, 0); 52 usleep_range(5000, 6000); 53 } 54 55 static int boe_bf060y8m_aj0_on(struct boe_bf060y8m_aj0 *boe) 56 { 57 struct mipi_dsi_device *dsi = boe->dsi; 58 struct device *dev = &dsi->dev; 59 int ret; 60 61 mipi_dsi_dcs_write_seq(dsi, 0xb0, 0xa5, 0x00); 62 mipi_dsi_dcs_write_seq(dsi, 0xb2, 0x00, 0x4c); 63 mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_SET_3D_CONTROL, 0x10); 64 mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_POWER_SAVE, DCS_ALLOW_HBM_RANGE); 65 mipi_dsi_dcs_write_seq(dsi, 0xf8, 66 0x00, 0x08, 0x10, 0x00, 0x22, 0x00, 0x00, 0x2d); 67 68 ret = mipi_dsi_dcs_exit_sleep_mode(dsi); 69 if (ret < 0) { 70 dev_err(dev, "Failed to exit sleep mode: %d\n", ret); 71 return ret; 72 } 73 msleep(30); 74 75 mipi_dsi_dcs_write_seq(dsi, 0xb0, 0xa5, 0x00); 76 mipi_dsi_dcs_write_seq(dsi, 0xc0, 77 0x08, 0x48, 0x65, 0x33, 0x33, 0x33, 78 0x2a, 0x31, 0x39, 0x20, 0x09); 79 mipi_dsi_dcs_write_seq(dsi, 0xc1, 0x00, 0x00, 0x00, 0x1f, 0x1f, 80 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 81 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f); 82 mipi_dsi_dcs_write_seq(dsi, 0xe2, 0x20, 0x04, 0x10, 0x12, 0x92, 83 0x4f, 0x8f, 0x44, 0x84, 0x83, 0x83, 0x83, 84 0x5c, 0x5c, 0x5c); 85 mipi_dsi_dcs_write_seq(dsi, 0xde, 0x01, 0x2c, 0x00, 0x77, 0x3e); 86 87 msleep(30); 88 89 ret = mipi_dsi_dcs_set_display_on(dsi); 90 if (ret < 0) { 91 dev_err(dev, "Failed to set display on: %d\n", ret); 92 return ret; 93 } 94 msleep(50); 95 96 return 0; 97 } 98 99 static int boe_bf060y8m_aj0_off(struct boe_bf060y8m_aj0 *boe) 100 { 101 struct mipi_dsi_device *dsi = boe->dsi; 102 struct device *dev = &dsi->dev; 103 int ret; 104 105 /* OFF commands sent in HS mode */ 106 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; 107 ret = mipi_dsi_dcs_set_display_off(dsi); 108 if (ret < 0) { 109 dev_err(dev, "Failed to set display off: %d\n", ret); 110 return ret; 111 } 112 msleep(20); 113 114 ret = mipi_dsi_dcs_enter_sleep_mode(dsi); 115 if (ret < 0) { 116 dev_err(dev, "Failed to enter sleep mode: %d\n", ret); 117 return ret; 118 } 119 usleep_range(1000, 2000); 120 dsi->mode_flags |= MIPI_DSI_MODE_LPM; 121 122 return 0; 123 } 124 125 static int boe_bf060y8m_aj0_prepare(struct drm_panel *panel) 126 { 127 struct boe_bf060y8m_aj0 *boe = to_boe_bf060y8m_aj0(panel); 128 struct device *dev = &boe->dsi->dev; 129 int ret; 130 131 /* 132 * Enable EL Driving Voltage first - doing that at the beginning 133 * or at the end of the power sequence doesn't matter, so enable 134 * it here to avoid yet another usleep at the end. 135 */ 136 ret = regulator_enable(boe->vregs[BF060Y8M_VREG_EL_VDD].consumer); 137 if (ret) 138 return ret; 139 ret = regulator_enable(boe->vregs[BF060Y8M_VREG_EL_VSS].consumer); 140 if (ret) 141 goto err_elvss; 142 143 ret = regulator_enable(boe->vregs[BF060Y8M_VREG_VCC].consumer); 144 if (ret) 145 goto err_vcc; 146 usleep_range(1000, 2000); 147 ret = regulator_enable(boe->vregs[BF060Y8M_VREG_VDDIO].consumer); 148 if (ret) 149 goto err_vddio; 150 usleep_range(500, 1000); 151 ret = regulator_enable(boe->vregs[BF060Y8M_VREG_VCI].consumer); 152 if (ret) 153 goto err_vci; 154 usleep_range(2000, 3000); 155 156 boe_bf060y8m_aj0_reset(boe); 157 158 ret = boe_bf060y8m_aj0_on(boe); 159 if (ret < 0) { 160 dev_err(dev, "Failed to initialize panel: %d\n", ret); 161 gpiod_set_value_cansleep(boe->reset_gpio, 1); 162 return ret; 163 } 164 165 return 0; 166 167 err_vci: 168 regulator_disable(boe->vregs[BF060Y8M_VREG_VDDIO].consumer); 169 err_vddio: 170 regulator_disable(boe->vregs[BF060Y8M_VREG_VCC].consumer); 171 err_vcc: 172 regulator_disable(boe->vregs[BF060Y8M_VREG_EL_VSS].consumer); 173 err_elvss: 174 regulator_disable(boe->vregs[BF060Y8M_VREG_EL_VDD].consumer); 175 return ret; 176 } 177 178 static int boe_bf060y8m_aj0_unprepare(struct drm_panel *panel) 179 { 180 struct boe_bf060y8m_aj0 *boe = to_boe_bf060y8m_aj0(panel); 181 struct device *dev = &boe->dsi->dev; 182 int ret; 183 184 ret = boe_bf060y8m_aj0_off(boe); 185 if (ret < 0) 186 dev_err(dev, "Failed to un-initialize panel: %d\n", ret); 187 188 gpiod_set_value_cansleep(boe->reset_gpio, 1); 189 ret = regulator_bulk_disable(ARRAY_SIZE(boe->vregs), boe->vregs); 190 191 return 0; 192 } 193 194 static const struct drm_display_mode boe_bf060y8m_aj0_mode = { 195 .clock = 165268, 196 .hdisplay = 1080, 197 .hsync_start = 1080 + 36, 198 .hsync_end = 1080 + 36 + 24, 199 .htotal = 1080 + 36 + 24 + 96, 200 .vdisplay = 2160, 201 .vsync_start = 2160 + 16, 202 .vsync_end = 2160 + 16 + 1, 203 .vtotal = 2160 + 16 + 1 + 15, 204 .width_mm = 68, /* 68.04 mm */ 205 .height_mm = 136, /* 136.08 mm */ 206 }; 207 208 static int boe_bf060y8m_aj0_get_modes(struct drm_panel *panel, 209 struct drm_connector *connector) 210 { 211 struct drm_display_mode *mode; 212 213 mode = drm_mode_duplicate(connector->dev, &boe_bf060y8m_aj0_mode); 214 if (!mode) 215 return -ENOMEM; 216 217 drm_mode_set_name(mode); 218 219 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; 220 connector->display_info.width_mm = mode->width_mm; 221 connector->display_info.height_mm = mode->height_mm; 222 drm_mode_probed_add(connector, mode); 223 224 return 1; 225 } 226 227 static const struct drm_panel_funcs boe_bf060y8m_aj0_panel_funcs = { 228 .prepare = boe_bf060y8m_aj0_prepare, 229 .unprepare = boe_bf060y8m_aj0_unprepare, 230 .get_modes = boe_bf060y8m_aj0_get_modes, 231 }; 232 233 static int boe_bf060y8m_aj0_bl_update_status(struct backlight_device *bl) 234 { 235 struct mipi_dsi_device *dsi = bl_get_data(bl); 236 u16 brightness = backlight_get_brightness(bl); 237 int ret; 238 239 ret = mipi_dsi_dcs_set_display_brightness(dsi, brightness); 240 if (ret < 0) 241 return ret; 242 243 return 0; 244 } 245 246 static int boe_bf060y8m_aj0_bl_get_brightness(struct backlight_device *bl) 247 { 248 struct mipi_dsi_device *dsi = bl_get_data(bl); 249 u16 brightness; 250 int ret; 251 252 ret = mipi_dsi_dcs_get_display_brightness(dsi, &brightness); 253 if (ret < 0) 254 return ret; 255 256 return brightness & 0xff; 257 } 258 259 static const struct backlight_ops boe_bf060y8m_aj0_bl_ops = { 260 .update_status = boe_bf060y8m_aj0_bl_update_status, 261 .get_brightness = boe_bf060y8m_aj0_bl_get_brightness, 262 }; 263 264 static struct backlight_device * 265 boe_bf060y8m_aj0_create_backlight(struct mipi_dsi_device *dsi) 266 { 267 struct device *dev = &dsi->dev; 268 const struct backlight_properties props = { 269 .type = BACKLIGHT_RAW, 270 .brightness = 127, 271 .max_brightness = 255, 272 .scale = BACKLIGHT_SCALE_NON_LINEAR, 273 }; 274 275 return devm_backlight_device_register(dev, dev_name(dev), dev, dsi, 276 &boe_bf060y8m_aj0_bl_ops, &props); 277 } 278 279 static int boe_bf060y8m_aj0_init_vregs(struct boe_bf060y8m_aj0 *boe, 280 struct device *dev) 281 { 282 struct regulator *vreg; 283 int ret; 284 285 boe->vregs[BF060Y8M_VREG_VCC].supply = "vcc"; 286 boe->vregs[BF060Y8M_VREG_VDDIO].supply = "vddio"; 287 boe->vregs[BF060Y8M_VREG_VCI].supply = "vci"; 288 boe->vregs[BF060Y8M_VREG_EL_VDD].supply = "elvdd"; 289 boe->vregs[BF060Y8M_VREG_EL_VSS].supply = "elvss"; 290 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(boe->vregs), 291 boe->vregs); 292 if (ret < 0) { 293 dev_err(dev, "Failed to get regulators: %d\n", ret); 294 return ret; 295 } 296 297 vreg = boe->vregs[BF060Y8M_VREG_VCC].consumer; 298 ret = regulator_is_supported_voltage(vreg, 2700000, 3600000); 299 if (!ret) 300 return ret; 301 302 vreg = boe->vregs[BF060Y8M_VREG_VDDIO].consumer; 303 ret = regulator_is_supported_voltage(vreg, 1620000, 1980000); 304 if (!ret) 305 return ret; 306 307 vreg = boe->vregs[BF060Y8M_VREG_VCI].consumer; 308 ret = regulator_is_supported_voltage(vreg, 2600000, 3600000); 309 if (!ret) 310 return ret; 311 312 vreg = boe->vregs[BF060Y8M_VREG_EL_VDD].consumer; 313 ret = regulator_is_supported_voltage(vreg, 4400000, 4800000); 314 if (!ret) 315 return ret; 316 317 /* ELVSS is negative: -5.00V to -1.40V */ 318 vreg = boe->vregs[BF060Y8M_VREG_EL_VSS].consumer; 319 ret = regulator_is_supported_voltage(vreg, 1400000, 5000000); 320 if (!ret) 321 return ret; 322 323 /* 324 * Set min/max rated current, known only for VCI and VDDIO and, 325 * in case of failure, just go on gracefully, as this step is not 326 * guaranteed to succeed on all regulator HW but do a debug print 327 * to inform the developer during debugging. 328 * In any case, these two supplies are also optional, so they may 329 * be fixed-regulator which, at the time of writing, does not 330 * support fake current limiting. 331 */ 332 vreg = boe->vregs[BF060Y8M_VREG_VDDIO].consumer; 333 ret = regulator_set_current_limit(vreg, 1500, 2500); 334 if (ret) 335 dev_dbg(dev, "Current limit cannot be set on %s: %d\n", 336 boe->vregs[1].supply, ret); 337 338 vreg = boe->vregs[BF060Y8M_VREG_VCI].consumer; 339 ret = regulator_set_current_limit(vreg, 20000, 40000); 340 if (ret) 341 dev_dbg(dev, "Current limit cannot be set on %s: %d\n", 342 boe->vregs[2].supply, ret); 343 344 return 0; 345 } 346 347 static int boe_bf060y8m_aj0_probe(struct mipi_dsi_device *dsi) 348 { 349 struct device *dev = &dsi->dev; 350 struct boe_bf060y8m_aj0 *boe; 351 int ret; 352 353 boe = devm_kzalloc(dev, sizeof(*boe), GFP_KERNEL); 354 if (!boe) 355 return -ENOMEM; 356 357 ret = boe_bf060y8m_aj0_init_vregs(boe, dev); 358 if (ret) 359 return dev_err_probe(dev, ret, 360 "Failed to initialize supplies.\n"); 361 362 boe->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_ASIS); 363 if (IS_ERR(boe->reset_gpio)) 364 return dev_err_probe(dev, PTR_ERR(boe->reset_gpio), 365 "Failed to get reset-gpios\n"); 366 367 boe->dsi = dsi; 368 mipi_dsi_set_drvdata(dsi, boe); 369 370 dsi->lanes = 4; 371 dsi->format = MIPI_DSI_FMT_RGB888; 372 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_NO_EOT_PACKET | 373 MIPI_DSI_MODE_VIDEO_SYNC_PULSE | 374 MIPI_DSI_CLOCK_NON_CONTINUOUS | 375 MIPI_DSI_MODE_LPM; 376 377 drm_panel_init(&boe->panel, dev, &boe_bf060y8m_aj0_panel_funcs, 378 DRM_MODE_CONNECTOR_DSI); 379 380 boe->panel.backlight = boe_bf060y8m_aj0_create_backlight(dsi); 381 if (IS_ERR(boe->panel.backlight)) 382 return dev_err_probe(dev, PTR_ERR(boe->panel.backlight), 383 "Failed to create backlight\n"); 384 385 drm_panel_add(&boe->panel); 386 387 ret = mipi_dsi_attach(dsi); 388 if (ret < 0) { 389 dev_err(dev, "Failed to attach to DSI host: %d\n", ret); 390 return ret; 391 } 392 393 return 0; 394 } 395 396 static void boe_bf060y8m_aj0_remove(struct mipi_dsi_device *dsi) 397 { 398 struct boe_bf060y8m_aj0 *boe = mipi_dsi_get_drvdata(dsi); 399 int ret; 400 401 ret = mipi_dsi_detach(dsi); 402 if (ret < 0) 403 dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret); 404 405 drm_panel_remove(&boe->panel); 406 } 407 408 static const struct of_device_id boe_bf060y8m_aj0_of_match[] = { 409 { .compatible = "boe,bf060y8m-aj0" }, 410 { /* sentinel */ } 411 }; 412 MODULE_DEVICE_TABLE(of, boe_bf060y8m_aj0_of_match); 413 414 static struct mipi_dsi_driver boe_bf060y8m_aj0_driver = { 415 .probe = boe_bf060y8m_aj0_probe, 416 .remove = boe_bf060y8m_aj0_remove, 417 .driver = { 418 .name = "panel-sw43404-boe-fhd-amoled", 419 .of_match_table = boe_bf060y8m_aj0_of_match, 420 }, 421 }; 422 module_mipi_dsi_driver(boe_bf060y8m_aj0_driver); 423 424 MODULE_AUTHOR("AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>"); 425 MODULE_DESCRIPTION("BOE BF060Y8M-AJ0 MIPI-DSI OLED panel"); 426 MODULE_LICENSE("GPL v2"); 427