1 // SPDX-License-Identifier: GPL-2.0-only 2 3 #include <linux/backlight.h> 4 #include <linux/delay.h> 5 #include <linux/gpio/consumer.h> 6 #include <linux/module.h> 7 #include <linux/of.h> 8 #include <linux/regulator/consumer.h> 9 10 #include <drm/drm_mipi_dsi.h> 11 #include <drm/drm_modes.h> 12 #include <drm/drm_panel.h> 13 14 struct tm5p5_nt35596 { 15 struct drm_panel panel; 16 struct mipi_dsi_device *dsi; 17 struct regulator_bulk_data supplies[2]; 18 struct gpio_desc *reset_gpio; 19 bool prepared; 20 }; 21 22 static inline struct tm5p5_nt35596 *to_tm5p5_nt35596(struct drm_panel *panel) 23 { 24 return container_of(panel, struct tm5p5_nt35596, panel); 25 } 26 27 static void tm5p5_nt35596_reset(struct tm5p5_nt35596 *ctx) 28 { 29 gpiod_set_value_cansleep(ctx->reset_gpio, 1); 30 usleep_range(1000, 2000); 31 gpiod_set_value_cansleep(ctx->reset_gpio, 0); 32 usleep_range(1000, 2000); 33 gpiod_set_value_cansleep(ctx->reset_gpio, 1); 34 usleep_range(15000, 16000); 35 } 36 37 static int tm5p5_nt35596_on(struct tm5p5_nt35596 *ctx) 38 { 39 struct mipi_dsi_device *dsi = ctx->dsi; 40 41 mipi_dsi_generic_write_seq(dsi, 0xff, 0x05); 42 mipi_dsi_generic_write_seq(dsi, 0xfb, 0x01); 43 mipi_dsi_generic_write_seq(dsi, 0xc5, 0x31); 44 mipi_dsi_generic_write_seq(dsi, 0xff, 0x04); 45 mipi_dsi_generic_write_seq(dsi, 0x01, 0x84); 46 mipi_dsi_generic_write_seq(dsi, 0x05, 0x25); 47 mipi_dsi_generic_write_seq(dsi, 0x06, 0x01); 48 mipi_dsi_generic_write_seq(dsi, 0x07, 0x20); 49 mipi_dsi_generic_write_seq(dsi, 0x08, 0x06); 50 mipi_dsi_generic_write_seq(dsi, 0x09, 0x08); 51 mipi_dsi_generic_write_seq(dsi, 0x0a, 0x10); 52 mipi_dsi_generic_write_seq(dsi, 0x0b, 0x10); 53 mipi_dsi_generic_write_seq(dsi, 0x0c, 0x10); 54 mipi_dsi_generic_write_seq(dsi, 0x0d, 0x14); 55 mipi_dsi_generic_write_seq(dsi, 0x0e, 0x14); 56 mipi_dsi_generic_write_seq(dsi, 0x0f, 0x14); 57 mipi_dsi_generic_write_seq(dsi, 0x10, 0x14); 58 mipi_dsi_generic_write_seq(dsi, 0x11, 0x14); 59 mipi_dsi_generic_write_seq(dsi, 0x12, 0x14); 60 mipi_dsi_generic_write_seq(dsi, 0x17, 0xf3); 61 mipi_dsi_generic_write_seq(dsi, 0x18, 0xc0); 62 mipi_dsi_generic_write_seq(dsi, 0x19, 0xc0); 63 mipi_dsi_generic_write_seq(dsi, 0x1a, 0xc0); 64 mipi_dsi_generic_write_seq(dsi, 0x1b, 0xb3); 65 mipi_dsi_generic_write_seq(dsi, 0x1c, 0xb3); 66 mipi_dsi_generic_write_seq(dsi, 0x1d, 0xb3); 67 mipi_dsi_generic_write_seq(dsi, 0x1e, 0xb3); 68 mipi_dsi_generic_write_seq(dsi, 0x1f, 0xb3); 69 mipi_dsi_generic_write_seq(dsi, 0x20, 0xb3); 70 mipi_dsi_generic_write_seq(dsi, 0xfb, 0x01); 71 mipi_dsi_generic_write_seq(dsi, 0xff, 0x00); 72 mipi_dsi_generic_write_seq(dsi, 0xfb, 0x01); 73 mipi_dsi_generic_write_seq(dsi, 0x35, 0x01); 74 mipi_dsi_generic_write_seq(dsi, 0xd3, 0x06); 75 mipi_dsi_generic_write_seq(dsi, 0xd4, 0x04); 76 mipi_dsi_generic_write_seq(dsi, 0x5e, 0x0d); 77 mipi_dsi_generic_write_seq(dsi, 0x11, 0x00); 78 msleep(100); 79 mipi_dsi_generic_write_seq(dsi, 0x29, 0x00); 80 mipi_dsi_generic_write_seq(dsi, 0x53, 0x24); 81 82 return 0; 83 } 84 85 static int tm5p5_nt35596_off(struct tm5p5_nt35596 *ctx) 86 { 87 struct mipi_dsi_device *dsi = ctx->dsi; 88 struct device *dev = &dsi->dev; 89 int ret; 90 91 ret = mipi_dsi_dcs_set_display_off(dsi); 92 if (ret < 0) { 93 dev_err(dev, "Failed to set display off: %d\n", ret); 94 return ret; 95 } 96 msleep(60); 97 98 ret = mipi_dsi_dcs_enter_sleep_mode(dsi); 99 if (ret < 0) { 100 dev_err(dev, "Failed to enter sleep mode: %d\n", ret); 101 return ret; 102 } 103 104 mipi_dsi_dcs_write_seq(dsi, 0x4f, 0x01); 105 106 return 0; 107 } 108 109 static int tm5p5_nt35596_prepare(struct drm_panel *panel) 110 { 111 struct tm5p5_nt35596 *ctx = to_tm5p5_nt35596(panel); 112 struct device *dev = &ctx->dsi->dev; 113 int ret; 114 115 if (ctx->prepared) 116 return 0; 117 118 ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies); 119 if (ret < 0) { 120 dev_err(dev, "Failed to enable regulators: %d\n", ret); 121 return ret; 122 } 123 124 tm5p5_nt35596_reset(ctx); 125 126 ret = tm5p5_nt35596_on(ctx); 127 if (ret < 0) { 128 dev_err(dev, "Failed to initialize panel: %d\n", ret); 129 gpiod_set_value_cansleep(ctx->reset_gpio, 0); 130 regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), 131 ctx->supplies); 132 return ret; 133 } 134 135 ctx->prepared = true; 136 return 0; 137 } 138 139 static int tm5p5_nt35596_unprepare(struct drm_panel *panel) 140 { 141 struct tm5p5_nt35596 *ctx = to_tm5p5_nt35596(panel); 142 struct device *dev = &ctx->dsi->dev; 143 int ret; 144 145 if (!ctx->prepared) 146 return 0; 147 148 ret = tm5p5_nt35596_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, 0); 153 regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), 154 ctx->supplies); 155 156 ctx->prepared = false; 157 return 0; 158 } 159 160 static const struct drm_display_mode tm5p5_nt35596_mode = { 161 .clock = (1080 + 100 + 8 + 16) * (1920 + 4 + 2 + 4) * 60 / 1000, 162 .hdisplay = 1080, 163 .hsync_start = 1080 + 100, 164 .hsync_end = 1080 + 100 + 8, 165 .htotal = 1080 + 100 + 8 + 16, 166 .vdisplay = 1920, 167 .vsync_start = 1920 + 4, 168 .vsync_end = 1920 + 4 + 2, 169 .vtotal = 1920 + 4 + 2 + 4, 170 .width_mm = 68, 171 .height_mm = 121, 172 }; 173 174 static int tm5p5_nt35596_get_modes(struct drm_panel *panel, 175 struct drm_connector *connector) 176 { 177 struct drm_display_mode *mode; 178 179 mode = drm_mode_duplicate(connector->dev, &tm5p5_nt35596_mode); 180 if (!mode) 181 return -ENOMEM; 182 183 drm_mode_set_name(mode); 184 185 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; 186 connector->display_info.width_mm = mode->width_mm; 187 connector->display_info.height_mm = mode->height_mm; 188 drm_mode_probed_add(connector, mode); 189 190 return 1; 191 } 192 193 static const struct drm_panel_funcs tm5p5_nt35596_panel_funcs = { 194 .prepare = tm5p5_nt35596_prepare, 195 .unprepare = tm5p5_nt35596_unprepare, 196 .get_modes = tm5p5_nt35596_get_modes, 197 }; 198 199 static int tm5p5_nt35596_bl_update_status(struct backlight_device *bl) 200 { 201 struct mipi_dsi_device *dsi = bl_get_data(bl); 202 u16 brightness = backlight_get_brightness(bl); 203 int ret; 204 205 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; 206 207 ret = mipi_dsi_dcs_set_display_brightness(dsi, brightness); 208 if (ret < 0) 209 return ret; 210 211 dsi->mode_flags |= MIPI_DSI_MODE_LPM; 212 213 return 0; 214 } 215 216 static int tm5p5_nt35596_bl_get_brightness(struct backlight_device *bl) 217 { 218 struct mipi_dsi_device *dsi = bl_get_data(bl); 219 u16 brightness = bl->props.brightness; 220 int ret; 221 222 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; 223 224 ret = mipi_dsi_dcs_get_display_brightness(dsi, &brightness); 225 if (ret < 0) 226 return ret; 227 228 dsi->mode_flags |= MIPI_DSI_MODE_LPM; 229 230 return brightness & 0xff; 231 } 232 233 static const struct backlight_ops tm5p5_nt35596_bl_ops = { 234 .update_status = tm5p5_nt35596_bl_update_status, 235 .get_brightness = tm5p5_nt35596_bl_get_brightness, 236 }; 237 238 static struct backlight_device * 239 tm5p5_nt35596_create_backlight(struct mipi_dsi_device *dsi) 240 { 241 struct device *dev = &dsi->dev; 242 const struct backlight_properties props = { 243 .type = BACKLIGHT_RAW, 244 .brightness = 255, 245 .max_brightness = 255, 246 }; 247 248 return devm_backlight_device_register(dev, dev_name(dev), dev, dsi, 249 &tm5p5_nt35596_bl_ops, &props); 250 } 251 252 static int tm5p5_nt35596_probe(struct mipi_dsi_device *dsi) 253 { 254 struct device *dev = &dsi->dev; 255 struct tm5p5_nt35596 *ctx; 256 int ret; 257 258 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); 259 if (!ctx) 260 return -ENOMEM; 261 262 ctx->supplies[0].supply = "vdd"; 263 ctx->supplies[1].supply = "vddio"; 264 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies), 265 ctx->supplies); 266 if (ret < 0) { 267 dev_err(dev, "Failed to get regulators: %d\n", ret); 268 return ret; 269 } 270 271 ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); 272 if (IS_ERR(ctx->reset_gpio)) { 273 ret = PTR_ERR(ctx->reset_gpio); 274 dev_err(dev, "Failed to get reset-gpios: %d\n", ret); 275 return ret; 276 } 277 278 ctx->dsi = dsi; 279 mipi_dsi_set_drvdata(dsi, ctx); 280 281 dsi->lanes = 4; 282 dsi->format = MIPI_DSI_FMT_RGB888; 283 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | 284 MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_NO_EOT_PACKET | 285 MIPI_DSI_CLOCK_NON_CONTINUOUS | MIPI_DSI_MODE_LPM; 286 287 drm_panel_init(&ctx->panel, dev, &tm5p5_nt35596_panel_funcs, 288 DRM_MODE_CONNECTOR_DSI); 289 290 ctx->panel.backlight = tm5p5_nt35596_create_backlight(dsi); 291 if (IS_ERR(ctx->panel.backlight)) { 292 ret = PTR_ERR(ctx->panel.backlight); 293 dev_err(dev, "Failed to create backlight: %d\n", ret); 294 return ret; 295 } 296 297 drm_panel_add(&ctx->panel); 298 299 ret = mipi_dsi_attach(dsi); 300 if (ret < 0) { 301 dev_err(dev, "Failed to attach to DSI host: %d\n", ret); 302 return ret; 303 } 304 305 return 0; 306 } 307 308 static void tm5p5_nt35596_remove(struct mipi_dsi_device *dsi) 309 { 310 struct tm5p5_nt35596 *ctx = mipi_dsi_get_drvdata(dsi); 311 int ret; 312 313 ret = mipi_dsi_detach(dsi); 314 if (ret < 0) 315 dev_err(&dsi->dev, 316 "Failed to detach from DSI host: %d\n", ret); 317 318 drm_panel_remove(&ctx->panel); 319 } 320 321 static const struct of_device_id tm5p5_nt35596_of_match[] = { 322 { .compatible = "asus,z00t-tm5p5-n35596" }, 323 { /* sentinel */ } 324 }; 325 MODULE_DEVICE_TABLE(of, tm5p5_nt35596_of_match); 326 327 static struct mipi_dsi_driver tm5p5_nt35596_driver = { 328 .probe = tm5p5_nt35596_probe, 329 .remove = tm5p5_nt35596_remove, 330 .driver = { 331 .name = "panel-tm5p5-nt35596", 332 .of_match_table = tm5p5_nt35596_of_match, 333 }, 334 }; 335 module_mipi_dsi_driver(tm5p5_nt35596_driver); 336 337 MODULE_AUTHOR("Konrad Dybcio <konradybcio@gmail.com>"); 338 MODULE_DESCRIPTION("DRM driver for tm5p5 nt35596 1080p video mode dsi panel"); 339 MODULE_LICENSE("GPL v2"); 340