1 // SPDX-License-Identifier: GPL-2.0-only 2 // Copyright (c) 2023, Linaro Limited 3 4 #include <linux/backlight.h> 5 #include <linux/delay.h> 6 #include <linux/gpio/consumer.h> 7 #include <linux/regulator/consumer.h> 8 #include <linux/module.h> 9 #include <linux/of.h> 10 11 #include <drm/display/drm_dsc.h> 12 #include <drm/drm_mipi_dsi.h> 13 #include <drm/drm_modes.h> 14 #include <drm/drm_panel.h> 15 16 #include <video/mipi_display.h> 17 18 struct visionox_vtdr6130 { 19 struct drm_panel panel; 20 struct mipi_dsi_device *dsi; 21 struct gpio_desc *reset_gpio; 22 struct regulator_bulk_data supplies[3]; 23 bool prepared; 24 }; 25 26 static inline struct visionox_vtdr6130 *to_visionox_vtdr6130(struct drm_panel *panel) 27 { 28 return container_of(panel, struct visionox_vtdr6130, panel); 29 } 30 31 static void visionox_vtdr6130_reset(struct visionox_vtdr6130 *ctx) 32 { 33 gpiod_set_value_cansleep(ctx->reset_gpio, 0); 34 usleep_range(10000, 11000); 35 gpiod_set_value_cansleep(ctx->reset_gpio, 1); 36 usleep_range(10000, 11000); 37 gpiod_set_value_cansleep(ctx->reset_gpio, 0); 38 usleep_range(10000, 11000); 39 } 40 41 static int visionox_vtdr6130_on(struct visionox_vtdr6130 *ctx) 42 { 43 struct mipi_dsi_device *dsi = ctx->dsi; 44 struct device *dev = &dsi->dev; 45 int ret; 46 47 dsi->mode_flags |= MIPI_DSI_MODE_LPM; 48 49 ret = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK); 50 if (ret) 51 return ret; 52 53 mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x20); 54 mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_SET_DISPLAY_BRIGHTNESS, 0x00, 0x00); 55 mipi_dsi_dcs_write_seq(dsi, 0x59, 0x09); 56 mipi_dsi_dcs_write_seq(dsi, 0x6c, 0x01); 57 mipi_dsi_dcs_write_seq(dsi, 0x6d, 0x00); 58 mipi_dsi_dcs_write_seq(dsi, 0x6f, 0x01); 59 mipi_dsi_dcs_write_seq(dsi, 0x70, 60 0x12, 0x00, 0x00, 0xab, 0x30, 0x80, 0x09, 0x60, 0x04, 61 0x38, 0x00, 0x28, 0x02, 0x1c, 0x02, 0x1c, 0x02, 0x00, 62 0x02, 0x0e, 0x00, 0x20, 0x03, 0xdd, 0x00, 0x07, 0x00, 63 0x0c, 0x02, 0x77, 0x02, 0x8b, 0x18, 0x00, 0x10, 0xf0, 64 0x07, 0x10, 0x20, 0x00, 0x06, 0x0f, 0x0f, 0x33, 0x0e, 65 0x1c, 0x2a, 0x38, 0x46, 0x54, 0x62, 0x69, 0x70, 0x77, 66 0x79, 0x7b, 0x7d, 0x7e, 0x02, 0x02, 0x22, 0x00, 0x2a, 67 0x40, 0x2a, 0xbe, 0x3a, 0xfc, 0x3a, 0xfa, 0x3a, 0xf8, 68 0x3b, 0x38, 0x3b, 0x78, 0x3b, 0xb6, 0x4b, 0xb6, 0x4b, 69 0xf4, 0x4b, 0xf4, 0x6c, 0x34, 0x84, 0x74, 0x00, 0x00, 70 0x00, 0x00, 0x00, 0x00); 71 mipi_dsi_dcs_write_seq(dsi, 0xf0, 0xaa, 0x10); 72 mipi_dsi_dcs_write_seq(dsi, 0xb1, 73 0x01, 0x38, 0x00, 0x14, 0x00, 0x1c, 0x00, 0x01, 0x66, 74 0x00, 0x14, 0x00, 0x14, 0x00, 0x01, 0x66, 0x00, 0x14, 75 0x05, 0xcc, 0x00); 76 mipi_dsi_dcs_write_seq(dsi, 0xf0, 0xaa, 0x13); 77 mipi_dsi_dcs_write_seq(dsi, 0xce, 78 0x09, 0x11, 0x09, 0x11, 0x08, 0xc1, 0x07, 0xfa, 0x05, 79 0xa4, 0x00, 0x3c, 0x00, 0x34, 0x00, 0x24, 0x00, 0x0c, 80 0x00, 0x0c, 0x04, 0x00, 0x35); 81 mipi_dsi_dcs_write_seq(dsi, 0xf0, 0xaa, 0x14); 82 mipi_dsi_dcs_write_seq(dsi, 0xb2, 0x03, 0x33); 83 mipi_dsi_dcs_write_seq(dsi, 0xb4, 84 0x00, 0x33, 0x00, 0x00, 0x00, 0x3e, 0x00, 0x00, 0x00, 85 0x3e, 0x00, 0x00); 86 mipi_dsi_dcs_write_seq(dsi, 0xb5, 87 0x00, 0x09, 0x09, 0x09, 0x09, 0x09, 0x09, 0x06, 0x01); 88 mipi_dsi_dcs_write_seq(dsi, 0xb9, 0x00, 0x00, 0x08, 0x09, 0x09, 0x09); 89 mipi_dsi_dcs_write_seq(dsi, 0xbc, 90 0x10, 0x00, 0x00, 0x06, 0x11, 0x09, 0x3b, 0x09, 0x47, 91 0x09, 0x47, 0x00); 92 mipi_dsi_dcs_write_seq(dsi, 0xbe, 93 0x10, 0x10, 0x00, 0x08, 0x22, 0x09, 0x19, 0x09, 0x25, 94 0x09, 0x25, 0x00); 95 mipi_dsi_dcs_write_seq(dsi, 0xff, 0x5a, 0x80); 96 mipi_dsi_dcs_write_seq(dsi, 0x65, 0x14); 97 mipi_dsi_dcs_write_seq(dsi, 0xfa, 0x08, 0x08, 0x08); 98 mipi_dsi_dcs_write_seq(dsi, 0xff, 0x5a, 0x81); 99 mipi_dsi_dcs_write_seq(dsi, 0x65, 0x05); 100 mipi_dsi_dcs_write_seq(dsi, 0xf3, 0x0f); 101 mipi_dsi_dcs_write_seq(dsi, 0xf0, 0xaa, 0x00); 102 mipi_dsi_dcs_write_seq(dsi, 0xff, 0x5a, 0x82); 103 mipi_dsi_dcs_write_seq(dsi, 0xf9, 0x00); 104 mipi_dsi_dcs_write_seq(dsi, 0xff, 0x51, 0x83); 105 mipi_dsi_dcs_write_seq(dsi, 0x65, 0x04); 106 mipi_dsi_dcs_write_seq(dsi, 0xf8, 0x00); 107 mipi_dsi_dcs_write_seq(dsi, 0xff, 0x5a, 0x00); 108 mipi_dsi_dcs_write_seq(dsi, 0x65, 0x01); 109 mipi_dsi_dcs_write_seq(dsi, 0xf4, 0x9a); 110 mipi_dsi_dcs_write_seq(dsi, 0xff, 0x5a, 0x00); 111 112 ret = mipi_dsi_dcs_exit_sleep_mode(dsi); 113 if (ret < 0) { 114 dev_err(dev, "Failed to exit sleep mode: %d\n", ret); 115 return ret; 116 } 117 msleep(120); 118 119 ret = mipi_dsi_dcs_set_display_on(dsi); 120 if (ret < 0) { 121 dev_err(dev, "Failed to set display on: %d\n", ret); 122 return ret; 123 } 124 msleep(20); 125 126 return 0; 127 } 128 129 static int visionox_vtdr6130_off(struct visionox_vtdr6130 *ctx) 130 { 131 struct mipi_dsi_device *dsi = ctx->dsi; 132 struct device *dev = &dsi->dev; 133 int ret; 134 135 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; 136 137 ret = mipi_dsi_dcs_set_display_off(dsi); 138 if (ret < 0) { 139 dev_err(dev, "Failed to set display off: %d\n", ret); 140 return ret; 141 } 142 msleep(20); 143 144 ret = mipi_dsi_dcs_enter_sleep_mode(dsi); 145 if (ret < 0) { 146 dev_err(dev, "Failed to enter sleep mode: %d\n", ret); 147 return ret; 148 } 149 msleep(120); 150 151 return 0; 152 } 153 154 static int visionox_vtdr6130_prepare(struct drm_panel *panel) 155 { 156 struct visionox_vtdr6130 *ctx = to_visionox_vtdr6130(panel); 157 struct device *dev = &ctx->dsi->dev; 158 int ret; 159 160 if (ctx->prepared) 161 return 0; 162 163 ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), 164 ctx->supplies); 165 if (ret < 0) 166 return ret; 167 168 visionox_vtdr6130_reset(ctx); 169 170 ret = visionox_vtdr6130_on(ctx); 171 if (ret < 0) { 172 dev_err(dev, "Failed to initialize panel: %d\n", ret); 173 gpiod_set_value_cansleep(ctx->reset_gpio, 1); 174 regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies); 175 return ret; 176 } 177 178 ctx->prepared = true; 179 return 0; 180 } 181 182 static int visionox_vtdr6130_unprepare(struct drm_panel *panel) 183 { 184 struct visionox_vtdr6130 *ctx = to_visionox_vtdr6130(panel); 185 struct device *dev = &ctx->dsi->dev; 186 int ret; 187 188 if (!ctx->prepared) 189 return 0; 190 191 ret = visionox_vtdr6130_off(ctx); 192 if (ret < 0) 193 dev_err(dev, "Failed to un-initialize panel: %d\n", ret); 194 195 gpiod_set_value_cansleep(ctx->reset_gpio, 1); 196 197 regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies); 198 199 ctx->prepared = false; 200 return 0; 201 } 202 203 static const struct drm_display_mode visionox_vtdr6130_mode = { 204 .clock = (1080 + 20 + 2 + 20) * (2400 + 20 + 2 + 18) * 144 / 1000, 205 .hdisplay = 1080, 206 .hsync_start = 1080 + 20, 207 .hsync_end = 1080 + 20 + 2, 208 .htotal = 1080 + 20 + 2 + 20, 209 .vdisplay = 2400, 210 .vsync_start = 2400 + 20, 211 .vsync_end = 2400 + 20 + 2, 212 .vtotal = 2400 + 20 + 2 + 18, 213 .width_mm = 71, 214 .height_mm = 157, 215 }; 216 217 static int visionox_vtdr6130_get_modes(struct drm_panel *panel, 218 struct drm_connector *connector) 219 { 220 struct drm_display_mode *mode; 221 222 mode = drm_mode_duplicate(connector->dev, &visionox_vtdr6130_mode); 223 if (!mode) 224 return -ENOMEM; 225 226 drm_mode_set_name(mode); 227 228 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; 229 connector->display_info.width_mm = mode->width_mm; 230 connector->display_info.height_mm = mode->height_mm; 231 drm_mode_probed_add(connector, mode); 232 233 return 1; 234 } 235 236 static const struct drm_panel_funcs visionox_vtdr6130_panel_funcs = { 237 .prepare = visionox_vtdr6130_prepare, 238 .unprepare = visionox_vtdr6130_unprepare, 239 .get_modes = visionox_vtdr6130_get_modes, 240 }; 241 242 static int visionox_vtdr6130_bl_update_status(struct backlight_device *bl) 243 { 244 struct mipi_dsi_device *dsi = bl_get_data(bl); 245 u16 brightness = backlight_get_brightness(bl); 246 /* Panel needs big-endian order of brightness value */ 247 u8 payload[2] = { brightness >> 8, brightness & 0xff }; 248 int ret; 249 250 ret = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_DISPLAY_BRIGHTNESS, 251 payload, sizeof(payload)); 252 if (ret < 0) 253 return ret; 254 255 return 0; 256 } 257 258 static const struct backlight_ops visionox_vtdr6130_bl_ops = { 259 .update_status = visionox_vtdr6130_bl_update_status, 260 }; 261 262 static struct backlight_device * 263 visionox_vtdr6130_create_backlight(struct mipi_dsi_device *dsi) 264 { 265 struct device *dev = &dsi->dev; 266 const struct backlight_properties props = { 267 .type = BACKLIGHT_RAW, 268 .brightness = 4095, 269 .max_brightness = 4095, 270 }; 271 272 return devm_backlight_device_register(dev, dev_name(dev), dev, dsi, 273 &visionox_vtdr6130_bl_ops, &props); 274 } 275 276 static int visionox_vtdr6130_probe(struct mipi_dsi_device *dsi) 277 { 278 struct device *dev = &dsi->dev; 279 struct visionox_vtdr6130 *ctx; 280 int ret; 281 282 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); 283 if (!ctx) 284 return -ENOMEM; 285 286 ctx->supplies[0].supply = "vddio"; 287 ctx->supplies[1].supply = "vci"; 288 ctx->supplies[2].supply = "vdd"; 289 290 ret = devm_regulator_bulk_get(&dsi->dev, ARRAY_SIZE(ctx->supplies), 291 ctx->supplies); 292 if (ret < 0) 293 return ret; 294 295 ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); 296 if (IS_ERR(ctx->reset_gpio)) 297 return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio), 298 "Failed to get reset-gpios\n"); 299 300 ctx->dsi = dsi; 301 mipi_dsi_set_drvdata(dsi, ctx); 302 303 dsi->lanes = 4; 304 dsi->format = MIPI_DSI_FMT_RGB888; 305 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_NO_EOT_PACKET | 306 MIPI_DSI_CLOCK_NON_CONTINUOUS; 307 308 drm_panel_init(&ctx->panel, dev, &visionox_vtdr6130_panel_funcs, 309 DRM_MODE_CONNECTOR_DSI); 310 311 ctx->panel.backlight = visionox_vtdr6130_create_backlight(dsi); 312 if (IS_ERR(ctx->panel.backlight)) 313 return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight), 314 "Failed to create backlight\n"); 315 316 drm_panel_add(&ctx->panel); 317 318 ret = mipi_dsi_attach(dsi); 319 if (ret < 0) { 320 dev_err(dev, "Failed to attach to DSI host: %d\n", ret); 321 drm_panel_remove(&ctx->panel); 322 return ret; 323 } 324 325 return 0; 326 } 327 328 static void visionox_vtdr6130_remove(struct mipi_dsi_device *dsi) 329 { 330 struct visionox_vtdr6130 *ctx = mipi_dsi_get_drvdata(dsi); 331 int ret; 332 333 ret = mipi_dsi_detach(dsi); 334 if (ret < 0) 335 dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret); 336 337 drm_panel_remove(&ctx->panel); 338 } 339 340 static const struct of_device_id visionox_vtdr6130_of_match[] = { 341 { .compatible = "visionox,vtdr6130" }, 342 { /* sentinel */ } 343 }; 344 MODULE_DEVICE_TABLE(of, visionox_vtdr6130_of_match); 345 346 static struct mipi_dsi_driver visionox_vtdr6130_driver = { 347 .probe = visionox_vtdr6130_probe, 348 .remove = visionox_vtdr6130_remove, 349 .driver = { 350 .name = "panel-visionox-vtdr6130", 351 .of_match_table = visionox_vtdr6130_of_match, 352 }, 353 }; 354 module_mipi_dsi_driver(visionox_vtdr6130_driver); 355 356 MODULE_AUTHOR("Neil Armstrong <neil.armstrong@linaro.org>"); 357 MODULE_DESCRIPTION("Panel driver for the Visionox VTDR6130 AMOLED DSI panel"); 358 MODULE_LICENSE("GPL"); 359