Chris Zhong | 14c8f2e | 2017-03-24 08:51:32 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License as published by |
| 6 | * the Free Software Foundation; either version 2 of the License, or |
| 7 | * (at your option) any later version. |
| 8 | */ |
| 9 | |
| 10 | #include <linux/backlight.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 <drm/drmP.h> |
| 17 | #include <drm/drm_crtc.h> |
| 18 | #include <drm/drm_mipi_dsi.h> |
| 19 | #include <drm/drm_panel.h> |
| 20 | |
| 21 | #include <video/mipi_display.h> |
| 22 | |
| 23 | struct innolux_panel { |
| 24 | struct drm_panel base; |
| 25 | struct mipi_dsi_device *link; |
| 26 | |
| 27 | struct backlight_device *backlight; |
| 28 | struct regulator *supply; |
| 29 | struct gpio_desc *enable_gpio; |
| 30 | |
| 31 | bool prepared; |
| 32 | bool enabled; |
| 33 | }; |
| 34 | |
| 35 | static inline struct innolux_panel *to_innolux_panel(struct drm_panel *panel) |
| 36 | { |
| 37 | return container_of(panel, struct innolux_panel, base); |
| 38 | } |
| 39 | |
| 40 | static int innolux_panel_disable(struct drm_panel *panel) |
| 41 | { |
| 42 | struct innolux_panel *innolux = to_innolux_panel(panel); |
| 43 | int err; |
| 44 | |
| 45 | if (!innolux->enabled) |
| 46 | return 0; |
| 47 | |
| 48 | innolux->backlight->props.power = FB_BLANK_POWERDOWN; |
| 49 | backlight_update_status(innolux->backlight); |
| 50 | |
| 51 | err = mipi_dsi_dcs_set_display_off(innolux->link); |
| 52 | if (err < 0) |
| 53 | DRM_DEV_ERROR(panel->dev, "failed to set display off: %d\n", |
| 54 | err); |
| 55 | |
| 56 | innolux->enabled = false; |
| 57 | |
| 58 | return 0; |
| 59 | } |
| 60 | |
| 61 | static int innolux_panel_unprepare(struct drm_panel *panel) |
| 62 | { |
| 63 | struct innolux_panel *innolux = to_innolux_panel(panel); |
| 64 | int err; |
| 65 | |
| 66 | if (!innolux->prepared) |
| 67 | return 0; |
| 68 | |
| 69 | err = mipi_dsi_dcs_enter_sleep_mode(innolux->link); |
| 70 | if (err < 0) { |
| 71 | DRM_DEV_ERROR(panel->dev, "failed to enter sleep mode: %d\n", |
| 72 | err); |
| 73 | return err; |
| 74 | } |
| 75 | |
| 76 | gpiod_set_value_cansleep(innolux->enable_gpio, 0); |
| 77 | |
| 78 | /* T8: 80ms - 1000ms */ |
| 79 | msleep(80); |
| 80 | |
| 81 | err = regulator_disable(innolux->supply); |
| 82 | if (err < 0) |
| 83 | return err; |
| 84 | |
| 85 | innolux->prepared = false; |
| 86 | |
| 87 | return 0; |
| 88 | } |
| 89 | |
| 90 | static int innolux_panel_prepare(struct drm_panel *panel) |
| 91 | { |
| 92 | struct innolux_panel *innolux = to_innolux_panel(panel); |
| 93 | int err, regulator_err; |
| 94 | |
| 95 | if (innolux->prepared) |
| 96 | return 0; |
| 97 | |
| 98 | gpiod_set_value_cansleep(innolux->enable_gpio, 0); |
| 99 | |
| 100 | err = regulator_enable(innolux->supply); |
| 101 | if (err < 0) |
| 102 | return err; |
| 103 | |
| 104 | /* T2: 15ms - 1000ms */ |
| 105 | usleep_range(15000, 16000); |
| 106 | |
| 107 | gpiod_set_value_cansleep(innolux->enable_gpio, 1); |
| 108 | |
| 109 | /* T4: 15ms - 1000ms */ |
| 110 | usleep_range(15000, 16000); |
| 111 | |
| 112 | err = mipi_dsi_dcs_exit_sleep_mode(innolux->link); |
| 113 | if (err < 0) { |
| 114 | DRM_DEV_ERROR(panel->dev, "failed to exit sleep mode: %d\n", |
| 115 | err); |
| 116 | goto poweroff; |
| 117 | } |
| 118 | |
| 119 | /* T6: 120ms - 1000ms*/ |
| 120 | msleep(120); |
| 121 | |
| 122 | err = mipi_dsi_dcs_set_display_on(innolux->link); |
| 123 | if (err < 0) { |
| 124 | DRM_DEV_ERROR(panel->dev, "failed to set display on: %d\n", |
| 125 | err); |
| 126 | goto poweroff; |
| 127 | } |
| 128 | |
| 129 | /* T7: 5ms */ |
| 130 | usleep_range(5000, 6000); |
| 131 | |
| 132 | innolux->prepared = true; |
| 133 | |
| 134 | return 0; |
| 135 | |
| 136 | poweroff: |
| 137 | regulator_err = regulator_disable(innolux->supply); |
| 138 | if (regulator_err) |
| 139 | DRM_DEV_ERROR(panel->dev, "failed to disable regulator: %d\n", |
| 140 | regulator_err); |
| 141 | |
| 142 | gpiod_set_value_cansleep(innolux->enable_gpio, 0); |
| 143 | return err; |
| 144 | } |
| 145 | |
| 146 | static int innolux_panel_enable(struct drm_panel *panel) |
| 147 | { |
| 148 | struct innolux_panel *innolux = to_innolux_panel(panel); |
| 149 | int ret; |
| 150 | |
| 151 | if (innolux->enabled) |
| 152 | return 0; |
| 153 | |
| 154 | innolux->backlight->props.power = FB_BLANK_UNBLANK; |
| 155 | ret = backlight_update_status(innolux->backlight); |
| 156 | if (ret) { |
| 157 | DRM_DEV_ERROR(panel->drm->dev, |
| 158 | "Failed to enable backlight %d\n", ret); |
| 159 | return ret; |
| 160 | } |
| 161 | |
| 162 | innolux->enabled = true; |
| 163 | |
| 164 | return 0; |
| 165 | } |
| 166 | |
| 167 | static const struct drm_display_mode default_mode = { |
| 168 | .clock = 56900, |
| 169 | .hdisplay = 768, |
| 170 | .hsync_start = 768 + 40, |
| 171 | .hsync_end = 768 + 40 + 40, |
| 172 | .htotal = 768 + 40 + 40 + 40, |
| 173 | .vdisplay = 1024, |
| 174 | .vsync_start = 1024 + 20, |
| 175 | .vsync_end = 1024 + 20 + 4, |
| 176 | .vtotal = 1024 + 20 + 4 + 20, |
| 177 | .vrefresh = 60, |
| 178 | }; |
| 179 | |
| 180 | static int innolux_panel_get_modes(struct drm_panel *panel) |
| 181 | { |
| 182 | struct drm_display_mode *mode; |
| 183 | |
| 184 | mode = drm_mode_duplicate(panel->drm, &default_mode); |
| 185 | if (!mode) { |
| 186 | DRM_DEV_ERROR(panel->drm->dev, "failed to add mode %ux%ux@%u\n", |
| 187 | default_mode.hdisplay, default_mode.vdisplay, |
| 188 | default_mode.vrefresh); |
| 189 | return -ENOMEM; |
| 190 | } |
| 191 | |
| 192 | drm_mode_set_name(mode); |
| 193 | |
| 194 | drm_mode_probed_add(panel->connector, mode); |
| 195 | |
| 196 | panel->connector->display_info.width_mm = 120; |
| 197 | panel->connector->display_info.height_mm = 160; |
| 198 | panel->connector->display_info.bpc = 8; |
| 199 | |
| 200 | return 1; |
| 201 | } |
| 202 | |
| 203 | static const struct drm_panel_funcs innolux_panel_funcs = { |
| 204 | .disable = innolux_panel_disable, |
| 205 | .unprepare = innolux_panel_unprepare, |
| 206 | .prepare = innolux_panel_prepare, |
| 207 | .enable = innolux_panel_enable, |
| 208 | .get_modes = innolux_panel_get_modes, |
| 209 | }; |
| 210 | |
| 211 | static const struct of_device_id innolux_of_match[] = { |
| 212 | { .compatible = "innolux,p079zca", }, |
| 213 | { } |
| 214 | }; |
| 215 | MODULE_DEVICE_TABLE(of, innolux_of_match); |
| 216 | |
| 217 | static int innolux_panel_add(struct innolux_panel *innolux) |
| 218 | { |
| 219 | struct device *dev = &innolux->link->dev; |
| 220 | struct device_node *np; |
| 221 | int err; |
| 222 | |
| 223 | innolux->supply = devm_regulator_get(dev, "power"); |
| 224 | if (IS_ERR(innolux->supply)) |
| 225 | return PTR_ERR(innolux->supply); |
| 226 | |
| 227 | innolux->enable_gpio = devm_gpiod_get_optional(dev, "enable", |
| 228 | GPIOD_OUT_HIGH); |
| 229 | if (IS_ERR(innolux->enable_gpio)) { |
| 230 | err = PTR_ERR(innolux->enable_gpio); |
| 231 | dev_dbg(dev, "failed to get enable gpio: %d\n", err); |
| 232 | innolux->enable_gpio = NULL; |
| 233 | } |
| 234 | |
| 235 | np = of_parse_phandle(dev->of_node, "backlight", 0); |
| 236 | if (np) { |
| 237 | innolux->backlight = of_find_backlight_by_node(np); |
| 238 | of_node_put(np); |
| 239 | |
| 240 | if (!innolux->backlight) |
| 241 | return -EPROBE_DEFER; |
| 242 | } |
| 243 | |
| 244 | drm_panel_init(&innolux->base); |
| 245 | innolux->base.funcs = &innolux_panel_funcs; |
| 246 | innolux->base.dev = &innolux->link->dev; |
| 247 | |
| 248 | err = drm_panel_add(&innolux->base); |
| 249 | if (err < 0) |
| 250 | goto put_backlight; |
| 251 | |
| 252 | return 0; |
| 253 | |
| 254 | put_backlight: |
| 255 | put_device(&innolux->backlight->dev); |
| 256 | |
| 257 | return err; |
| 258 | } |
| 259 | |
| 260 | static void innolux_panel_del(struct innolux_panel *innolux) |
| 261 | { |
| 262 | if (innolux->base.dev) |
| 263 | drm_panel_remove(&innolux->base); |
| 264 | |
| 265 | put_device(&innolux->backlight->dev); |
| 266 | } |
| 267 | |
| 268 | static int innolux_panel_probe(struct mipi_dsi_device *dsi) |
| 269 | { |
| 270 | struct innolux_panel *innolux; |
| 271 | int err; |
| 272 | |
| 273 | dsi->lanes = 4; |
| 274 | dsi->format = MIPI_DSI_FMT_RGB888; |
| 275 | dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE | |
| 276 | MIPI_DSI_MODE_LPM; |
| 277 | |
| 278 | innolux = devm_kzalloc(&dsi->dev, sizeof(*innolux), GFP_KERNEL); |
| 279 | if (!innolux) |
| 280 | return -ENOMEM; |
| 281 | |
| 282 | mipi_dsi_set_drvdata(dsi, innolux); |
| 283 | |
| 284 | innolux->link = dsi; |
| 285 | |
| 286 | err = innolux_panel_add(innolux); |
| 287 | if (err < 0) |
| 288 | return err; |
| 289 | |
| 290 | err = mipi_dsi_attach(dsi); |
| 291 | return err; |
| 292 | } |
| 293 | |
| 294 | static int innolux_panel_remove(struct mipi_dsi_device *dsi) |
| 295 | { |
| 296 | struct innolux_panel *innolux = mipi_dsi_get_drvdata(dsi); |
| 297 | int err; |
| 298 | |
| 299 | err = innolux_panel_unprepare(&innolux->base); |
| 300 | if (err < 0) |
| 301 | DRM_DEV_ERROR(&dsi->dev, "failed to unprepare panel: %d\n", |
| 302 | err); |
| 303 | |
| 304 | err = innolux_panel_disable(&innolux->base); |
| 305 | if (err < 0) |
| 306 | DRM_DEV_ERROR(&dsi->dev, "failed to disable panel: %d\n", err); |
| 307 | |
| 308 | err = mipi_dsi_detach(dsi); |
| 309 | if (err < 0) |
| 310 | DRM_DEV_ERROR(&dsi->dev, "failed to detach from DSI host: %d\n", |
| 311 | err); |
| 312 | |
| 313 | drm_panel_detach(&innolux->base); |
| 314 | innolux_panel_del(innolux); |
| 315 | |
| 316 | return 0; |
| 317 | } |
| 318 | |
| 319 | static void innolux_panel_shutdown(struct mipi_dsi_device *dsi) |
| 320 | { |
| 321 | struct innolux_panel *innolux = mipi_dsi_get_drvdata(dsi); |
| 322 | |
| 323 | innolux_panel_unprepare(&innolux->base); |
| 324 | innolux_panel_disable(&innolux->base); |
| 325 | } |
| 326 | |
| 327 | static struct mipi_dsi_driver innolux_panel_driver = { |
| 328 | .driver = { |
| 329 | .name = "panel-innolux-p079zca", |
| 330 | .of_match_table = innolux_of_match, |
| 331 | }, |
| 332 | .probe = innolux_panel_probe, |
| 333 | .remove = innolux_panel_remove, |
| 334 | .shutdown = innolux_panel_shutdown, |
| 335 | }; |
| 336 | module_mipi_dsi_driver(innolux_panel_driver); |
| 337 | |
| 338 | MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>"); |
| 339 | MODULE_DESCRIPTION("Innolux P079ZCA panel driver"); |
| 340 | MODULE_LICENSE("GPL v2"); |