1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Generated with linux-mdss-dsi-panel-driver-generator from vendor device tree. 4 * Copyright (c) 2024 David Wronek <david@mainlining.org> 5 */ 6 7 #include <linux/backlight.h> 8 #include <linux/delay.h> 9 #include <linux/gpio/consumer.h> 10 #include <linux/module.h> 11 #include <linux/of.h> 12 #include <linux/of_device.h> 13 #include <linux/of_graph.h> 14 #include <linux/regulator/consumer.h> 15 16 #include <video/mipi_display.h> 17 18 #include <drm/drm_mipi_dsi.h> 19 #include <drm/drm_modes.h> 20 #include <drm/drm_panel.h> 21 #include <drm/drm_probe_helper.h> 22 23 struct rm69380_panel { 24 struct drm_panel panel; 25 struct mipi_dsi_device *dsi[2]; 26 struct regulator_bulk_data supplies[2]; 27 struct gpio_desc *reset_gpio; 28 }; 29 30 static inline 31 struct rm69380_panel *to_rm69380_panel(struct drm_panel *panel) 32 { 33 return container_of(panel, struct rm69380_panel, panel); 34 } 35 36 static void rm69380_reset(struct rm69380_panel *ctx) 37 { 38 gpiod_set_value_cansleep(ctx->reset_gpio, 0); 39 usleep_range(15000, 16000); 40 gpiod_set_value_cansleep(ctx->reset_gpio, 1); 41 usleep_range(10000, 11000); 42 gpiod_set_value_cansleep(ctx->reset_gpio, 0); 43 msleep(30); 44 } 45 46 static int rm69380_on(struct rm69380_panel *ctx) 47 { 48 struct mipi_dsi_device *dsi = ctx->dsi[0]; 49 struct device *dev = &dsi->dev; 50 int ret; 51 52 dsi->mode_flags |= MIPI_DSI_MODE_LPM; 53 if (ctx->dsi[1]) 54 ctx->dsi[1]->mode_flags |= MIPI_DSI_MODE_LPM; 55 56 mipi_dsi_dcs_write_seq(dsi, 0xfe, 0xd4); 57 mipi_dsi_dcs_write_seq(dsi, 0x00, 0x80); 58 mipi_dsi_dcs_write_seq(dsi, 0xfe, 0xd0); 59 mipi_dsi_dcs_write_seq(dsi, 0x48, 0x00); 60 mipi_dsi_dcs_write_seq(dsi, 0xfe, 0x26); 61 mipi_dsi_dcs_write_seq(dsi, 0x75, 0x3f); 62 mipi_dsi_dcs_write_seq(dsi, 0x1d, 0x1a); 63 mipi_dsi_dcs_write_seq(dsi, 0xfe, 0x00); 64 mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x28); 65 mipi_dsi_dcs_write_seq(dsi, 0xc2, 0x08); 66 67 ret = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK); 68 if (ret < 0) { 69 dev_err(dev, "Failed to set tear on: %d\n", ret); 70 return ret; 71 } 72 73 ret = mipi_dsi_dcs_exit_sleep_mode(dsi); 74 if (ret < 0) { 75 dev_err(dev, "Failed to exit sleep mode: %d\n", ret); 76 return ret; 77 } 78 msleep(20); 79 80 ret = mipi_dsi_dcs_set_display_on(dsi); 81 if (ret < 0) { 82 dev_err(dev, "Failed to set display on: %d\n", ret); 83 return ret; 84 } 85 msleep(36); 86 87 return 0; 88 } 89 90 static int rm69380_off(struct rm69380_panel *ctx) 91 { 92 struct mipi_dsi_device *dsi = ctx->dsi[0]; 93 struct device *dev = &dsi->dev; 94 int ret; 95 96 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; 97 if (ctx->dsi[1]) 98 ctx->dsi[1]->mode_flags &= ~MIPI_DSI_MODE_LPM; 99 100 ret = mipi_dsi_dcs_set_display_off(dsi); 101 if (ret < 0) { 102 dev_err(dev, "Failed to set display off: %d\n", ret); 103 return ret; 104 } 105 msleep(35); 106 107 ret = mipi_dsi_dcs_enter_sleep_mode(dsi); 108 if (ret < 0) { 109 dev_err(dev, "Failed to enter sleep mode: %d\n", ret); 110 return ret; 111 } 112 msleep(20); 113 114 return 0; 115 } 116 117 static int rm69380_prepare(struct drm_panel *panel) 118 { 119 struct rm69380_panel *ctx = to_rm69380_panel(panel); 120 struct device *dev = &ctx->dsi[0]->dev; 121 int ret; 122 123 ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies); 124 if (ret < 0) { 125 dev_err(dev, "Failed to enable regulators: %d\n", ret); 126 return ret; 127 } 128 129 rm69380_reset(ctx); 130 131 ret = rm69380_on(ctx); 132 if (ret < 0) { 133 dev_err(dev, "Failed to initialize panel: %d\n", ret); 134 gpiod_set_value_cansleep(ctx->reset_gpio, 1); 135 regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies); 136 return ret; 137 } 138 139 return 0; 140 } 141 142 static int rm69380_unprepare(struct drm_panel *panel) 143 { 144 struct rm69380_panel *ctx = to_rm69380_panel(panel); 145 struct device *dev = &ctx->dsi[0]->dev; 146 int ret; 147 148 ret = rm69380_off(ctx); 149 if (ret < 0) 150 dev_err(dev, "Failed to un-initialize panel: %d\n", ret); 151 152 gpiod_set_value_cansleep(ctx->reset_gpio, 1); 153 regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies); 154 155 return 0; 156 } 157 158 static const struct drm_display_mode rm69380_mode = { 159 .clock = (2560 + 32 + 12 + 38) * (1600 + 20 + 4 + 8) * 90 / 1000, 160 .hdisplay = 2560, 161 .hsync_start = 2560 + 32, 162 .hsync_end = 2560 + 32 + 12, 163 .htotal = 2560 + 32 + 12 + 38, 164 .vdisplay = 1600, 165 .vsync_start = 1600 + 20, 166 .vsync_end = 1600 + 20 + 4, 167 .vtotal = 1600 + 20 + 4 + 8, 168 .width_mm = 248, 169 .height_mm = 155, 170 .type = DRM_MODE_TYPE_DRIVER, 171 }; 172 173 static int rm69380_get_modes(struct drm_panel *panel, 174 struct drm_connector *connector) 175 { 176 return drm_connector_helper_get_modes_fixed(connector, &rm69380_mode); 177 } 178 179 static const struct drm_panel_funcs rm69380_panel_funcs = { 180 .prepare = rm69380_prepare, 181 .unprepare = rm69380_unprepare, 182 .get_modes = rm69380_get_modes, 183 }; 184 185 static int rm69380_bl_update_status(struct backlight_device *bl) 186 { 187 struct mipi_dsi_device *dsi = bl_get_data(bl); 188 u16 brightness = backlight_get_brightness(bl); 189 int ret; 190 191 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; 192 193 ret = mipi_dsi_dcs_set_display_brightness_large(dsi, brightness); 194 if (ret < 0) 195 return ret; 196 197 dsi->mode_flags |= MIPI_DSI_MODE_LPM; 198 199 return 0; 200 } 201 202 static int rm69380_bl_get_brightness(struct backlight_device *bl) 203 { 204 struct mipi_dsi_device *dsi = bl_get_data(bl); 205 u16 brightness; 206 int ret; 207 208 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; 209 210 ret = mipi_dsi_dcs_get_display_brightness_large(dsi, &brightness); 211 if (ret < 0) 212 return ret; 213 214 dsi->mode_flags |= MIPI_DSI_MODE_LPM; 215 216 return brightness; 217 } 218 219 static const struct backlight_ops rm69380_bl_ops = { 220 .update_status = rm69380_bl_update_status, 221 .get_brightness = rm69380_bl_get_brightness, 222 }; 223 224 static struct backlight_device * 225 rm69380_create_backlight(struct mipi_dsi_device *dsi) 226 { 227 struct device *dev = &dsi->dev; 228 const struct backlight_properties props = { 229 .type = BACKLIGHT_RAW, 230 .brightness = 511, 231 .max_brightness = 2047, 232 }; 233 234 return devm_backlight_device_register(dev, dev_name(dev), dev, dsi, 235 &rm69380_bl_ops, &props); 236 } 237 238 static int rm69380_probe(struct mipi_dsi_device *dsi) 239 { 240 struct mipi_dsi_host *dsi_sec_host; 241 struct rm69380_panel *ctx; 242 struct device *dev = &dsi->dev; 243 struct device_node *dsi_sec; 244 int ret, i; 245 246 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); 247 if (!ctx) 248 return -ENOMEM; 249 250 ctx->supplies[0].supply = "vddio"; 251 ctx->supplies[1].supply = "avdd"; 252 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies), 253 ctx->supplies); 254 if (ret < 0) 255 return dev_err_probe(dev, ret, "Failed to get regulators\n"); 256 257 ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); 258 if (IS_ERR(ctx->reset_gpio)) 259 return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio), 260 "Failed to get reset-gpios\n"); 261 262 dsi_sec = of_graph_get_remote_node(dsi->dev.of_node, 1, -1); 263 264 if (dsi_sec) { 265 const struct mipi_dsi_device_info info = { "RM69380 DSI1", 0, 266 dsi_sec }; 267 268 dsi_sec_host = of_find_mipi_dsi_host_by_node(dsi_sec); 269 of_node_put(dsi_sec); 270 if (!dsi_sec_host) 271 return dev_err_probe(dev, -EPROBE_DEFER, 272 "Cannot get secondary DSI host\n"); 273 274 ctx->dsi[1] = 275 devm_mipi_dsi_device_register_full(dev, dsi_sec_host, &info); 276 if (IS_ERR(ctx->dsi[1])) 277 return dev_err_probe(dev, PTR_ERR(ctx->dsi[1]), 278 "Cannot get secondary DSI node\n"); 279 280 mipi_dsi_set_drvdata(ctx->dsi[1], ctx); 281 } 282 283 ctx->dsi[0] = dsi; 284 mipi_dsi_set_drvdata(dsi, ctx); 285 286 drm_panel_init(&ctx->panel, dev, &rm69380_panel_funcs, 287 DRM_MODE_CONNECTOR_DSI); 288 ctx->panel.prepare_prev_first = true; 289 290 ctx->panel.backlight = rm69380_create_backlight(dsi); 291 if (IS_ERR(ctx->panel.backlight)) 292 return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight), 293 "Failed to create backlight\n"); 294 295 drm_panel_add(&ctx->panel); 296 297 for (i = 0; i < ARRAY_SIZE(ctx->dsi); i++) { 298 if (!ctx->dsi[i]) 299 continue; 300 301 dev_dbg(&ctx->dsi[i]->dev, "Binding DSI %d\n", i); 302 303 ctx->dsi[i]->lanes = 4; 304 ctx->dsi[i]->format = MIPI_DSI_FMT_RGB888; 305 ctx->dsi[i]->mode_flags = MIPI_DSI_MODE_VIDEO_BURST | 306 MIPI_DSI_CLOCK_NON_CONTINUOUS; 307 308 ret = devm_mipi_dsi_attach(dev, ctx->dsi[i]); 309 if (ret < 0) { 310 drm_panel_remove(&ctx->panel); 311 return dev_err_probe(dev, ret, 312 "Failed to attach to DSI%d\n", i); 313 } 314 } 315 316 return 0; 317 } 318 319 static void rm69380_remove(struct mipi_dsi_device *dsi) 320 { 321 struct rm69380_panel *ctx = mipi_dsi_get_drvdata(dsi); 322 323 drm_panel_remove(&ctx->panel); 324 } 325 326 static const struct of_device_id rm69380_of_match[] = { 327 { .compatible = "lenovo,j716f-edo-rm69380" }, 328 { /* sentinel */ } 329 }; 330 MODULE_DEVICE_TABLE(of, rm69380_of_match); 331 332 static struct mipi_dsi_driver rm69380_panel_driver = { 333 .probe = rm69380_probe, 334 .remove = rm69380_remove, 335 .driver = { 336 .name = "panel-raydium-rm69380", 337 .of_match_table = rm69380_of_match, 338 }, 339 }; 340 module_mipi_dsi_driver(rm69380_panel_driver); 341 342 MODULE_AUTHOR("David Wronek <david@mainlining.org"); 343 MODULE_DESCRIPTION("DRM driver for Raydium RM69380-equipped DSI panels"); 344 MODULE_LICENSE("GPL"); 345