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 }; 20 21 static inline struct tm5p5_nt35596 *to_tm5p5_nt35596(struct drm_panel *panel) 22 { 23 return container_of(panel, struct tm5p5_nt35596, panel); 24 } 25 26 static void tm5p5_nt35596_reset(struct tm5p5_nt35596 *ctx) 27 { 28 gpiod_set_value_cansleep(ctx->reset_gpio, 1); 29 usleep_range(1000, 2000); 30 gpiod_set_value_cansleep(ctx->reset_gpio, 0); 31 usleep_range(1000, 2000); 32 gpiod_set_value_cansleep(ctx->reset_gpio, 1); 33 usleep_range(15000, 16000); 34 } 35 36 static int tm5p5_nt35596_on(struct tm5p5_nt35596 *ctx) 37 { 38 struct mipi_dsi_device *dsi = ctx->dsi; 39 40 mipi_dsi_generic_write_seq(dsi, 0xff, 0x05); 41 mipi_dsi_generic_write_seq(dsi, 0xfb, 0x01); 42 mipi_dsi_generic_write_seq(dsi, 0xc5, 0x31); 43 mipi_dsi_generic_write_seq(dsi, 0xff, 0x04); 44 mipi_dsi_generic_write_seq(dsi, 0x01, 0x84); 45 mipi_dsi_generic_write_seq(dsi, 0x05, 0x25); 46 mipi_dsi_generic_write_seq(dsi, 0x06, 0x01); 47 mipi_dsi_generic_write_seq(dsi, 0x07, 0x20); 48 mipi_dsi_generic_write_seq(dsi, 0x08, 0x06); 49 mipi_dsi_generic_write_seq(dsi, 0x09, 0x08); 50 mipi_dsi_generic_write_seq(dsi, 0x0a, 0x10); 51 mipi_dsi_generic_write_seq(dsi, 0x0b, 0x10); 52 mipi_dsi_generic_write_seq(dsi, 0x0c, 0x10); 53 mipi_dsi_generic_write_seq(dsi, 0x0d, 0x14); 54 mipi_dsi_generic_write_seq(dsi, 0x0e, 0x14); 55 mipi_dsi_generic_write_seq(dsi, 0x0f, 0x14); 56 mipi_dsi_generic_write_seq(dsi, 0x10, 0x14); 57 mipi_dsi_generic_write_seq(dsi, 0x11, 0x14); 58 mipi_dsi_generic_write_seq(dsi, 0x12, 0x14); 59 mipi_dsi_generic_write_seq(dsi, 0x17, 0xf3); 60 mipi_dsi_generic_write_seq(dsi, 0x18, 0xc0); 61 mipi_dsi_generic_write_seq(dsi, 0x19, 0xc0); 62 mipi_dsi_generic_write_seq(dsi, 0x1a, 0xc0); 63 mipi_dsi_generic_write_seq(dsi, 0x1b, 0xb3); 64 mipi_dsi_generic_write_seq(dsi, 0x1c, 0xb3); 65 mipi_dsi_generic_write_seq(dsi, 0x1d, 0xb3); 66 mipi_dsi_generic_write_seq(dsi, 0x1e, 0xb3); 67 mipi_dsi_generic_write_seq(dsi, 0x1f, 0xb3); 68 mipi_dsi_generic_write_seq(dsi, 0x20, 0xb3); 69 mipi_dsi_generic_write_seq(dsi, 0xfb, 0x01); 70 mipi_dsi_generic_write_seq(dsi, 0xff, 0x00); 71 mipi_dsi_generic_write_seq(dsi, 0xfb, 0x01); 72 mipi_dsi_generic_write_seq(dsi, 0x35, 0x01); 73 mipi_dsi_generic_write_seq(dsi, 0xd3, 0x06); 74 mipi_dsi_generic_write_seq(dsi, 0xd4, 0x04); 75 mipi_dsi_generic_write_seq(dsi, 0x5e, 0x0d); 76 mipi_dsi_generic_write_seq(dsi, 0x11, 0x00); 77 msleep(100); 78 mipi_dsi_generic_write_seq(dsi, 0x29, 0x00); 79 mipi_dsi_generic_write_seq(dsi, 0x53, 0x24); 80 81 return 0; 82 } 83 84 static int tm5p5_nt35596_off(struct tm5p5_nt35596 *ctx) 85 { 86 struct mipi_dsi_device *dsi = ctx->dsi; 87 struct device *dev = &dsi->dev; 88 int ret; 89 90 ret = mipi_dsi_dcs_set_display_off(dsi); 91 if (ret < 0) { 92 dev_err(dev, "Failed to set display off: %d\n", ret); 93 return ret; 94 } 95 msleep(60); 96 97 ret = mipi_dsi_dcs_enter_sleep_mode(dsi); 98 if (ret < 0) { 99 dev_err(dev, "Failed to enter sleep mode: %d\n", ret); 100 return ret; 101 } 102 103 mipi_dsi_dcs_write_seq(dsi, 0x4f, 0x01); 104 105 return 0; 106 } 107 108 static int tm5p5_nt35596_prepare(struct drm_panel *panel) 109 { 110 struct tm5p5_nt35596 *ctx = to_tm5p5_nt35596(panel); 111 struct device *dev = &ctx->dsi->dev; 112 int ret; 113 114 ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies); 115 if (ret < 0) { 116 dev_err(dev, "Failed to enable regulators: %d\n", ret); 117 return ret; 118 } 119 120 tm5p5_nt35596_reset(ctx); 121 122 ret = tm5p5_nt35596_on(ctx); 123 if (ret < 0) { 124 dev_err(dev, "Failed to initialize panel: %d\n", ret); 125 gpiod_set_value_cansleep(ctx->reset_gpio, 0); 126 regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), 127 ctx->supplies); 128 return ret; 129 } 130 131 return 0; 132 } 133 134 static int tm5p5_nt35596_unprepare(struct drm_panel *panel) 135 { 136 struct tm5p5_nt35596 *ctx = to_tm5p5_nt35596(panel); 137 struct device *dev = &ctx->dsi->dev; 138 int ret; 139 140 ret = tm5p5_nt35596_off(ctx); 141 if (ret < 0) 142 dev_err(dev, "Failed to un-initialize panel: %d\n", ret); 143 144 gpiod_set_value_cansleep(ctx->reset_gpio, 0); 145 regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), 146 ctx->supplies); 147 148 return 0; 149 } 150 151 static const struct drm_display_mode tm5p5_nt35596_mode = { 152 .clock = (1080 + 100 + 8 + 16) * (1920 + 4 + 2 + 4) * 60 / 1000, 153 .hdisplay = 1080, 154 .hsync_start = 1080 + 100, 155 .hsync_end = 1080 + 100 + 8, 156 .htotal = 1080 + 100 + 8 + 16, 157 .vdisplay = 1920, 158 .vsync_start = 1920 + 4, 159 .vsync_end = 1920 + 4 + 2, 160 .vtotal = 1920 + 4 + 2 + 4, 161 .width_mm = 68, 162 .height_mm = 121, 163 }; 164 165 static int tm5p5_nt35596_get_modes(struct drm_panel *panel, 166 struct drm_connector *connector) 167 { 168 struct drm_display_mode *mode; 169 170 mode = drm_mode_duplicate(connector->dev, &tm5p5_nt35596_mode); 171 if (!mode) 172 return -ENOMEM; 173 174 drm_mode_set_name(mode); 175 176 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; 177 connector->display_info.width_mm = mode->width_mm; 178 connector->display_info.height_mm = mode->height_mm; 179 drm_mode_probed_add(connector, mode); 180 181 return 1; 182 } 183 184 static const struct drm_panel_funcs tm5p5_nt35596_panel_funcs = { 185 .prepare = tm5p5_nt35596_prepare, 186 .unprepare = tm5p5_nt35596_unprepare, 187 .get_modes = tm5p5_nt35596_get_modes, 188 }; 189 190 static int tm5p5_nt35596_bl_update_status(struct backlight_device *bl) 191 { 192 struct mipi_dsi_device *dsi = bl_get_data(bl); 193 u16 brightness = backlight_get_brightness(bl); 194 int ret; 195 196 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; 197 198 ret = mipi_dsi_dcs_set_display_brightness(dsi, brightness); 199 if (ret < 0) 200 return ret; 201 202 dsi->mode_flags |= MIPI_DSI_MODE_LPM; 203 204 return 0; 205 } 206 207 static int tm5p5_nt35596_bl_get_brightness(struct backlight_device *bl) 208 { 209 struct mipi_dsi_device *dsi = bl_get_data(bl); 210 u16 brightness = bl->props.brightness; 211 int ret; 212 213 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; 214 215 ret = mipi_dsi_dcs_get_display_brightness(dsi, &brightness); 216 if (ret < 0) 217 return ret; 218 219 dsi->mode_flags |= MIPI_DSI_MODE_LPM; 220 221 return brightness & 0xff; 222 } 223 224 static const struct backlight_ops tm5p5_nt35596_bl_ops = { 225 .update_status = tm5p5_nt35596_bl_update_status, 226 .get_brightness = tm5p5_nt35596_bl_get_brightness, 227 }; 228 229 static struct backlight_device * 230 tm5p5_nt35596_create_backlight(struct mipi_dsi_device *dsi) 231 { 232 struct device *dev = &dsi->dev; 233 const struct backlight_properties props = { 234 .type = BACKLIGHT_RAW, 235 .brightness = 255, 236 .max_brightness = 255, 237 }; 238 239 return devm_backlight_device_register(dev, dev_name(dev), dev, dsi, 240 &tm5p5_nt35596_bl_ops, &props); 241 } 242 243 static int tm5p5_nt35596_probe(struct mipi_dsi_device *dsi) 244 { 245 struct device *dev = &dsi->dev; 246 struct tm5p5_nt35596 *ctx; 247 int ret; 248 249 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); 250 if (!ctx) 251 return -ENOMEM; 252 253 ctx->supplies[0].supply = "vdd"; 254 ctx->supplies[1].supply = "vddio"; 255 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies), 256 ctx->supplies); 257 if (ret < 0) { 258 dev_err(dev, "Failed to get regulators: %d\n", ret); 259 return ret; 260 } 261 262 ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); 263 if (IS_ERR(ctx->reset_gpio)) { 264 ret = PTR_ERR(ctx->reset_gpio); 265 dev_err(dev, "Failed to get reset-gpios: %d\n", ret); 266 return ret; 267 } 268 269 ctx->dsi = dsi; 270 mipi_dsi_set_drvdata(dsi, ctx); 271 272 dsi->lanes = 4; 273 dsi->format = MIPI_DSI_FMT_RGB888; 274 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | 275 MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_NO_EOT_PACKET | 276 MIPI_DSI_CLOCK_NON_CONTINUOUS | MIPI_DSI_MODE_LPM; 277 278 drm_panel_init(&ctx->panel, dev, &tm5p5_nt35596_panel_funcs, 279 DRM_MODE_CONNECTOR_DSI); 280 281 ctx->panel.backlight = tm5p5_nt35596_create_backlight(dsi); 282 if (IS_ERR(ctx->panel.backlight)) { 283 ret = PTR_ERR(ctx->panel.backlight); 284 dev_err(dev, "Failed to create backlight: %d\n", ret); 285 return ret; 286 } 287 288 drm_panel_add(&ctx->panel); 289 290 ret = mipi_dsi_attach(dsi); 291 if (ret < 0) { 292 dev_err(dev, "Failed to attach to DSI host: %d\n", ret); 293 return ret; 294 } 295 296 return 0; 297 } 298 299 static void tm5p5_nt35596_remove(struct mipi_dsi_device *dsi) 300 { 301 struct tm5p5_nt35596 *ctx = mipi_dsi_get_drvdata(dsi); 302 int ret; 303 304 ret = mipi_dsi_detach(dsi); 305 if (ret < 0) 306 dev_err(&dsi->dev, 307 "Failed to detach from DSI host: %d\n", ret); 308 309 drm_panel_remove(&ctx->panel); 310 } 311 312 static const struct of_device_id tm5p5_nt35596_of_match[] = { 313 { .compatible = "asus,z00t-tm5p5-n35596" }, 314 { /* sentinel */ } 315 }; 316 MODULE_DEVICE_TABLE(of, tm5p5_nt35596_of_match); 317 318 static struct mipi_dsi_driver tm5p5_nt35596_driver = { 319 .probe = tm5p5_nt35596_probe, 320 .remove = tm5p5_nt35596_remove, 321 .driver = { 322 .name = "panel-tm5p5-nt35596", 323 .of_match_table = tm5p5_nt35596_of_match, 324 }, 325 }; 326 module_mipi_dsi_driver(tm5p5_nt35596_driver); 327 328 MODULE_AUTHOR("Konrad Dybcio <konradybcio@gmail.com>"); 329 MODULE_DESCRIPTION("DRM driver for tm5p5 nt35596 1080p video mode dsi panel"); 330 MODULE_LICENSE("GPL v2"); 331