1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2015 Red Hat 4 * Copyright (C) 2015 Sony Mobile Communications Inc. 5 * Author: Werner Johansson <werner.johansson@sonymobile.com> 6 * 7 * Based on AUO panel driver by Rob Clark <robdclark@gmail.com> 8 */ 9 10 #include <linux/delay.h> 11 #include <linux/gpio/consumer.h> 12 #include <linux/module.h> 13 #include <linux/of.h> 14 #include <linux/regulator/consumer.h> 15 16 #include <video/mipi_display.h> 17 18 #include <drm/drm_crtc.h> 19 #include <drm/drm_device.h> 20 #include <drm/drm_mipi_dsi.h> 21 #include <drm/drm_panel.h> 22 23 struct sharp_nt_panel { 24 struct drm_panel base; 25 struct mipi_dsi_device *dsi; 26 27 struct regulator *supply; 28 struct gpio_desc *reset_gpio; 29 30 bool prepared; 31 }; 32 33 static inline struct sharp_nt_panel *to_sharp_nt_panel(struct drm_panel *panel) 34 { 35 return container_of(panel, struct sharp_nt_panel, base); 36 } 37 38 static int sharp_nt_panel_init(struct sharp_nt_panel *sharp_nt) 39 { 40 struct mipi_dsi_device *dsi = sharp_nt->dsi; 41 int ret; 42 43 dsi->mode_flags |= MIPI_DSI_MODE_LPM; 44 45 ret = mipi_dsi_dcs_exit_sleep_mode(dsi); 46 if (ret < 0) 47 return ret; 48 49 msleep(120); 50 51 /* Novatek two-lane operation */ 52 ret = mipi_dsi_dcs_write(dsi, 0xae, (u8[]){ 0x03 }, 1); 53 if (ret < 0) 54 return ret; 55 56 /* Set both MCU and RGB I/F to 24bpp */ 57 ret = mipi_dsi_dcs_set_pixel_format(dsi, MIPI_DCS_PIXEL_FMT_24BIT | 58 (MIPI_DCS_PIXEL_FMT_24BIT << 4)); 59 if (ret < 0) 60 return ret; 61 62 return 0; 63 } 64 65 static int sharp_nt_panel_on(struct sharp_nt_panel *sharp_nt) 66 { 67 struct mipi_dsi_device *dsi = sharp_nt->dsi; 68 int ret; 69 70 dsi->mode_flags |= MIPI_DSI_MODE_LPM; 71 72 ret = mipi_dsi_dcs_set_display_on(dsi); 73 if (ret < 0) 74 return ret; 75 76 return 0; 77 } 78 79 static int sharp_nt_panel_off(struct sharp_nt_panel *sharp_nt) 80 { 81 struct mipi_dsi_device *dsi = sharp_nt->dsi; 82 int ret; 83 84 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; 85 86 ret = mipi_dsi_dcs_set_display_off(dsi); 87 if (ret < 0) 88 return ret; 89 90 ret = mipi_dsi_dcs_enter_sleep_mode(dsi); 91 if (ret < 0) 92 return ret; 93 94 return 0; 95 } 96 97 static int sharp_nt_panel_unprepare(struct drm_panel *panel) 98 { 99 struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel); 100 int ret; 101 102 if (!sharp_nt->prepared) 103 return 0; 104 105 ret = sharp_nt_panel_off(sharp_nt); 106 if (ret < 0) { 107 dev_err(panel->dev, "failed to set panel off: %d\n", ret); 108 return ret; 109 } 110 111 regulator_disable(sharp_nt->supply); 112 if (sharp_nt->reset_gpio) 113 gpiod_set_value(sharp_nt->reset_gpio, 0); 114 115 sharp_nt->prepared = false; 116 117 return 0; 118 } 119 120 static int sharp_nt_panel_prepare(struct drm_panel *panel) 121 { 122 struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel); 123 int ret; 124 125 if (sharp_nt->prepared) 126 return 0; 127 128 ret = regulator_enable(sharp_nt->supply); 129 if (ret < 0) 130 return ret; 131 132 msleep(20); 133 134 if (sharp_nt->reset_gpio) { 135 gpiod_set_value(sharp_nt->reset_gpio, 1); 136 msleep(1); 137 gpiod_set_value(sharp_nt->reset_gpio, 0); 138 msleep(1); 139 gpiod_set_value(sharp_nt->reset_gpio, 1); 140 msleep(10); 141 } 142 143 ret = sharp_nt_panel_init(sharp_nt); 144 if (ret < 0) { 145 dev_err(panel->dev, "failed to init panel: %d\n", ret); 146 goto poweroff; 147 } 148 149 ret = sharp_nt_panel_on(sharp_nt); 150 if (ret < 0) { 151 dev_err(panel->dev, "failed to set panel on: %d\n", ret); 152 goto poweroff; 153 } 154 155 sharp_nt->prepared = true; 156 157 return 0; 158 159 poweroff: 160 regulator_disable(sharp_nt->supply); 161 if (sharp_nt->reset_gpio) 162 gpiod_set_value(sharp_nt->reset_gpio, 0); 163 return ret; 164 } 165 166 static const struct drm_display_mode default_mode = { 167 .clock = (540 + 48 + 32 + 80) * (960 + 3 + 10 + 15) * 60 / 1000, 168 .hdisplay = 540, 169 .hsync_start = 540 + 48, 170 .hsync_end = 540 + 48 + 32, 171 .htotal = 540 + 48 + 32 + 80, 172 .vdisplay = 960, 173 .vsync_start = 960 + 3, 174 .vsync_end = 960 + 3 + 10, 175 .vtotal = 960 + 3 + 10 + 15, 176 }; 177 178 static int sharp_nt_panel_get_modes(struct drm_panel *panel, 179 struct drm_connector *connector) 180 { 181 struct drm_display_mode *mode; 182 183 mode = drm_mode_duplicate(connector->dev, &default_mode); 184 if (!mode) { 185 dev_err(panel->dev, "failed to add mode %ux%u@%u\n", 186 default_mode.hdisplay, default_mode.vdisplay, 187 drm_mode_vrefresh(&default_mode)); 188 return -ENOMEM; 189 } 190 191 drm_mode_set_name(mode); 192 193 drm_mode_probed_add(connector, mode); 194 195 connector->display_info.width_mm = 54; 196 connector->display_info.height_mm = 95; 197 198 return 1; 199 } 200 201 static const struct drm_panel_funcs sharp_nt_panel_funcs = { 202 .unprepare = sharp_nt_panel_unprepare, 203 .prepare = sharp_nt_panel_prepare, 204 .get_modes = sharp_nt_panel_get_modes, 205 }; 206 207 static int sharp_nt_panel_add(struct sharp_nt_panel *sharp_nt) 208 { 209 struct device *dev = &sharp_nt->dsi->dev; 210 int ret; 211 212 sharp_nt->supply = devm_regulator_get(dev, "avdd"); 213 if (IS_ERR(sharp_nt->supply)) 214 return PTR_ERR(sharp_nt->supply); 215 216 sharp_nt->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); 217 if (IS_ERR(sharp_nt->reset_gpio)) { 218 dev_err(dev, "cannot get reset-gpios %ld\n", 219 PTR_ERR(sharp_nt->reset_gpio)); 220 sharp_nt->reset_gpio = NULL; 221 } else { 222 gpiod_set_value(sharp_nt->reset_gpio, 0); 223 } 224 225 drm_panel_init(&sharp_nt->base, &sharp_nt->dsi->dev, 226 &sharp_nt_panel_funcs, DRM_MODE_CONNECTOR_DSI); 227 228 ret = drm_panel_of_backlight(&sharp_nt->base); 229 if (ret) 230 return ret; 231 232 drm_panel_add(&sharp_nt->base); 233 234 return 0; 235 } 236 237 static void sharp_nt_panel_del(struct sharp_nt_panel *sharp_nt) 238 { 239 if (sharp_nt->base.dev) 240 drm_panel_remove(&sharp_nt->base); 241 } 242 243 static int sharp_nt_panel_probe(struct mipi_dsi_device *dsi) 244 { 245 struct sharp_nt_panel *sharp_nt; 246 int ret; 247 248 dsi->lanes = 2; 249 dsi->format = MIPI_DSI_FMT_RGB888; 250 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | 251 MIPI_DSI_MODE_VIDEO_SYNC_PULSE | 252 MIPI_DSI_MODE_VIDEO_HSE | 253 MIPI_DSI_CLOCK_NON_CONTINUOUS | 254 MIPI_DSI_MODE_NO_EOT_PACKET; 255 256 sharp_nt = devm_kzalloc(&dsi->dev, sizeof(*sharp_nt), GFP_KERNEL); 257 if (!sharp_nt) 258 return -ENOMEM; 259 260 mipi_dsi_set_drvdata(dsi, sharp_nt); 261 262 sharp_nt->dsi = dsi; 263 264 ret = sharp_nt_panel_add(sharp_nt); 265 if (ret < 0) 266 return ret; 267 268 ret = mipi_dsi_attach(dsi); 269 if (ret < 0) { 270 sharp_nt_panel_del(sharp_nt); 271 return ret; 272 } 273 274 return 0; 275 } 276 277 static void sharp_nt_panel_remove(struct mipi_dsi_device *dsi) 278 { 279 struct sharp_nt_panel *sharp_nt = mipi_dsi_get_drvdata(dsi); 280 int ret; 281 282 ret = drm_panel_disable(&sharp_nt->base); 283 if (ret < 0) 284 dev_err(&dsi->dev, "failed to disable panel: %d\n", ret); 285 286 ret = mipi_dsi_detach(dsi); 287 if (ret < 0) 288 dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret); 289 290 sharp_nt_panel_del(sharp_nt); 291 } 292 293 static void sharp_nt_panel_shutdown(struct mipi_dsi_device *dsi) 294 { 295 struct sharp_nt_panel *sharp_nt = mipi_dsi_get_drvdata(dsi); 296 297 drm_panel_disable(&sharp_nt->base); 298 } 299 300 static const struct of_device_id sharp_nt_of_match[] = { 301 { .compatible = "sharp,ls043t1le01-qhd", }, 302 { } 303 }; 304 MODULE_DEVICE_TABLE(of, sharp_nt_of_match); 305 306 static struct mipi_dsi_driver sharp_nt_panel_driver = { 307 .driver = { 308 .name = "panel-sharp-ls043t1le01-qhd", 309 .of_match_table = sharp_nt_of_match, 310 }, 311 .probe = sharp_nt_panel_probe, 312 .remove = sharp_nt_panel_remove, 313 .shutdown = sharp_nt_panel_shutdown, 314 }; 315 module_mipi_dsi_driver(sharp_nt_panel_driver); 316 317 MODULE_AUTHOR("Werner Johansson <werner.johansson@sonymobile.com>"); 318 MODULE_DESCRIPTION("Sharp LS043T1LE01 NT35565-based qHD (540x960) video mode panel driver"); 319 MODULE_LICENSE("GPL v2"); 320