1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Mantix MLAF057WE51 5.7" MIPI-DSI panel driver 4 * 5 * Copyright (C) Purism SPC 2020 6 */ 7 8 #include <linux/backlight.h> 9 #include <linux/delay.h> 10 #include <linux/gpio/consumer.h> 11 #include <linux/module.h> 12 #include <linux/regulator/consumer.h> 13 14 #include <video/mipi_display.h> 15 16 #include <drm/drm_mipi_dsi.h> 17 #include <drm/drm_modes.h> 18 #include <drm/drm_panel.h> 19 20 #define DRV_NAME "panel-mantix-mlaf057we51" 21 22 /* Manufacturer specific Commands send via DSI */ 23 #define MANTIX_CMD_OTP_STOP_RELOAD_MIPI 0x41 24 #define MANTIX_CMD_INT_CANCEL 0x4C 25 26 struct mantix { 27 struct device *dev; 28 struct drm_panel panel; 29 struct gpio_desc *reset_gpio; 30 31 struct regulator *avdd; 32 struct regulator *avee; 33 struct regulator *vddi; 34 }; 35 36 static inline struct mantix *panel_to_mantix(struct drm_panel *panel) 37 { 38 return container_of(panel, struct mantix, panel); 39 } 40 41 #define dsi_generic_write_seq(dsi, seq...) do { \ 42 static const u8 d[] = { seq }; \ 43 int ret; \ 44 ret = mipi_dsi_generic_write(dsi, d, ARRAY_SIZE(d)); \ 45 if (ret < 0) \ 46 return ret; \ 47 } while (0) 48 49 static int mantix_init_sequence(struct mantix *ctx) 50 { 51 struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev); 52 struct device *dev = ctx->dev; 53 54 /* 55 * Init sequence was supplied by the panel vendor. 56 */ 57 dsi_generic_write_seq(dsi, MANTIX_CMD_OTP_STOP_RELOAD_MIPI, 0x5A); 58 59 dsi_generic_write_seq(dsi, MANTIX_CMD_INT_CANCEL, 0x03); 60 dsi_generic_write_seq(dsi, MANTIX_CMD_OTP_STOP_RELOAD_MIPI, 0x5A, 0x03); 61 dsi_generic_write_seq(dsi, 0x80, 0xA9, 0x00); 62 63 dsi_generic_write_seq(dsi, MANTIX_CMD_OTP_STOP_RELOAD_MIPI, 0x5A, 0x09); 64 dsi_generic_write_seq(dsi, 0x80, 0x64, 0x00, 0x64, 0x00, 0x00); 65 msleep(20); 66 67 dev_dbg(dev, "Panel init sequence done\n"); 68 return 0; 69 } 70 71 static int mantix_enable(struct drm_panel *panel) 72 { 73 struct mantix *ctx = panel_to_mantix(panel); 74 struct device *dev = ctx->dev; 75 struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev); 76 int ret; 77 78 ret = mantix_init_sequence(ctx); 79 if (ret < 0) { 80 dev_err(ctx->dev, "Panel init sequence failed: %d\n", ret); 81 return ret; 82 } 83 84 ret = mipi_dsi_dcs_exit_sleep_mode(dsi); 85 if (ret < 0) { 86 dev_err(dev, "Failed to exit sleep mode\n"); 87 return ret; 88 } 89 msleep(20); 90 91 ret = mipi_dsi_dcs_set_display_on(dsi); 92 if (ret) 93 return ret; 94 usleep_range(10000, 12000); 95 96 ret = mipi_dsi_turn_on_peripheral(dsi); 97 if (ret < 0) { 98 dev_err(dev, "Failed to turn on peripheral\n"); 99 return ret; 100 } 101 102 return 0; 103 } 104 105 static int mantix_disable(struct drm_panel *panel) 106 { 107 struct mantix *ctx = panel_to_mantix(panel); 108 struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev); 109 int ret; 110 111 ret = mipi_dsi_dcs_set_display_off(dsi); 112 if (ret < 0) 113 dev_err(ctx->dev, "Failed to turn off the display: %d\n", ret); 114 115 ret = mipi_dsi_dcs_enter_sleep_mode(dsi); 116 if (ret < 0) 117 dev_err(ctx->dev, "Failed to enter sleep mode: %d\n", ret); 118 119 120 return 0; 121 } 122 123 static int mantix_unprepare(struct drm_panel *panel) 124 { 125 struct mantix *ctx = panel_to_mantix(panel); 126 127 regulator_disable(ctx->avee); 128 regulator_disable(ctx->avdd); 129 /* T11 */ 130 usleep_range(5000, 6000); 131 regulator_disable(ctx->vddi); 132 /* T14 */ 133 msleep(50); 134 135 return 0; 136 } 137 138 static int mantix_prepare(struct drm_panel *panel) 139 { 140 struct mantix *ctx = panel_to_mantix(panel); 141 int ret; 142 143 /* Focaltech FT8006P, section 7.3.1 and 7.3.4 */ 144 dev_dbg(ctx->dev, "Resetting the panel\n"); 145 ret = regulator_enable(ctx->vddi); 146 if (ret < 0) { 147 dev_err(ctx->dev, "Failed to enable vddi supply: %d\n", ret); 148 return ret; 149 } 150 151 /* T1 + T2 */ 152 usleep_range(8000, 10000); 153 154 ret = regulator_enable(ctx->avdd); 155 if (ret < 0) { 156 dev_err(ctx->dev, "Failed to enable avdd supply: %d\n", ret); 157 return ret; 158 } 159 160 /* T2d */ 161 usleep_range(3500, 4000); 162 ret = regulator_enable(ctx->avee); 163 if (ret < 0) { 164 dev_err(ctx->dev, "Failed to enable avee supply: %d\n", ret); 165 return ret; 166 } 167 168 /* T3+T5 */ 169 usleep_range(10000, 12000); 170 171 gpiod_set_value_cansleep(ctx->reset_gpio, 1); 172 usleep_range(5150, 7000); 173 174 gpiod_set_value_cansleep(ctx->reset_gpio, 0); 175 176 /* T6 */ 177 msleep(50); 178 179 return 0; 180 } 181 182 static const struct drm_display_mode default_mode = { 183 .hdisplay = 720, 184 .hsync_start = 720 + 45, 185 .hsync_end = 720 + 45 + 14, 186 .htotal = 720 + 45 + 14 + 25, 187 .vdisplay = 1440, 188 .vsync_start = 1440 + 130, 189 .vsync_end = 1440 + 130 + 8, 190 .vtotal = 1440 + 130 + 8 + 106, 191 .clock = 85298, 192 .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC, 193 .width_mm = 65, 194 .height_mm = 130, 195 }; 196 197 static int mantix_get_modes(struct drm_panel *panel, 198 struct drm_connector *connector) 199 { 200 struct mantix *ctx = panel_to_mantix(panel); 201 struct drm_display_mode *mode; 202 203 mode = drm_mode_duplicate(connector->dev, &default_mode); 204 if (!mode) { 205 dev_err(ctx->dev, "Failed to add mode %ux%u@%u\n", 206 default_mode.hdisplay, default_mode.vdisplay, 207 drm_mode_vrefresh(mode)); 208 return -ENOMEM; 209 } 210 211 drm_mode_set_name(mode); 212 213 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; 214 connector->display_info.width_mm = mode->width_mm; 215 connector->display_info.height_mm = mode->height_mm; 216 drm_mode_probed_add(connector, mode); 217 218 return 1; 219 } 220 221 static const struct drm_panel_funcs mantix_drm_funcs = { 222 .disable = mantix_disable, 223 .unprepare = mantix_unprepare, 224 .prepare = mantix_prepare, 225 .enable = mantix_enable, 226 .get_modes = mantix_get_modes, 227 }; 228 229 static int mantix_probe(struct mipi_dsi_device *dsi) 230 { 231 struct device *dev = &dsi->dev; 232 struct mantix *ctx; 233 int ret; 234 235 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); 236 if (!ctx) 237 return -ENOMEM; 238 239 ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); 240 if (IS_ERR(ctx->reset_gpio)) { 241 dev_err(dev, "cannot get reset gpio\n"); 242 return PTR_ERR(ctx->reset_gpio); 243 } 244 245 mipi_dsi_set_drvdata(dsi, ctx); 246 ctx->dev = dev; 247 248 dsi->lanes = 4; 249 dsi->format = MIPI_DSI_FMT_RGB888; 250 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | 251 MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_VIDEO_SYNC_PULSE; 252 253 ctx->avdd = devm_regulator_get(dev, "avdd"); 254 if (IS_ERR(ctx->avdd)) 255 return dev_err_probe(dev, PTR_ERR(ctx->avdd), "Failed to request avdd regulator\n"); 256 257 ctx->avee = devm_regulator_get(dev, "avee"); 258 if (IS_ERR(ctx->avee)) 259 return dev_err_probe(dev, PTR_ERR(ctx->avee), "Failed to request avee regulator\n"); 260 261 ctx->vddi = devm_regulator_get(dev, "vddi"); 262 if (IS_ERR(ctx->vddi)) 263 return dev_err_probe(dev, PTR_ERR(ctx->vddi), "Failed to request vddi regulator\n"); 264 265 drm_panel_init(&ctx->panel, dev, &mantix_drm_funcs, 266 DRM_MODE_CONNECTOR_DSI); 267 268 ret = drm_panel_of_backlight(&ctx->panel); 269 if (ret) 270 return ret; 271 272 drm_panel_add(&ctx->panel); 273 274 ret = mipi_dsi_attach(dsi); 275 if (ret < 0) { 276 dev_err(dev, "mipi_dsi_attach failed (%d). Is host ready?\n", ret); 277 drm_panel_remove(&ctx->panel); 278 return ret; 279 } 280 281 dev_info(dev, "%ux%u@%u %ubpp dsi %udl - ready\n", 282 default_mode.hdisplay, default_mode.vdisplay, 283 drm_mode_vrefresh(&default_mode), 284 mipi_dsi_pixel_format_to_bpp(dsi->format), dsi->lanes); 285 286 return 0; 287 } 288 289 static void mantix_shutdown(struct mipi_dsi_device *dsi) 290 { 291 struct mantix *ctx = mipi_dsi_get_drvdata(dsi); 292 293 drm_panel_unprepare(&ctx->panel); 294 drm_panel_disable(&ctx->panel); 295 } 296 297 static int mantix_remove(struct mipi_dsi_device *dsi) 298 { 299 struct mantix *ctx = mipi_dsi_get_drvdata(dsi); 300 301 mantix_shutdown(dsi); 302 303 mipi_dsi_detach(dsi); 304 drm_panel_remove(&ctx->panel); 305 306 return 0; 307 } 308 309 static const struct of_device_id mantix_of_match[] = { 310 { .compatible = "mantix,mlaf057we51-x" }, 311 { /* sentinel */ } 312 }; 313 MODULE_DEVICE_TABLE(of, mantix_of_match); 314 315 static struct mipi_dsi_driver mantix_driver = { 316 .probe = mantix_probe, 317 .remove = mantix_remove, 318 .shutdown = mantix_shutdown, 319 .driver = { 320 .name = DRV_NAME, 321 .of_match_table = mantix_of_match, 322 }, 323 }; 324 module_mipi_dsi_driver(mantix_driver); 325 326 MODULE_AUTHOR("Guido Günther <agx@sigxcpu.org>"); 327 MODULE_DESCRIPTION("DRM driver for Mantix MLAF057WE51-X MIPI DSI panel"); 328 MODULE_LICENSE("GPL v2"); 329