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