1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2021 Raffaele Tranquillini <raffaele.tranquillini@gmail.com> 4 * 5 * Generated using linux-mdss-dsi-panel-driver-generator from Lineage OS device tree: 6 * https://github.com/LineageOS/android_kernel_xiaomi_msm8996/blob/lineage-18.1/arch/arm/boot/dts/qcom/a1-msm8996-mtp.dtsi 7 */ 8 9 #include <linux/delay.h> 10 #include <linux/gpio/consumer.h> 11 #include <linux/module.h> 12 #include <linux/of.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 struct jdi_fhd_r63452 { 21 struct drm_panel panel; 22 struct mipi_dsi_device *dsi; 23 struct gpio_desc *reset_gpio; 24 bool prepared; 25 }; 26 27 static inline struct jdi_fhd_r63452 *to_jdi_fhd_r63452(struct drm_panel *panel) 28 { 29 return container_of(panel, struct jdi_fhd_r63452, panel); 30 } 31 32 #define dsi_generic_write_seq(dsi, seq...) do { \ 33 static const u8 d[] = { seq }; \ 34 int ret; \ 35 ret = mipi_dsi_generic_write(dsi, d, ARRAY_SIZE(d)); \ 36 if (ret < 0) \ 37 return ret; \ 38 } while (0) 39 40 #define dsi_dcs_write_seq(dsi, seq...) do { \ 41 static const u8 d[] = { seq }; \ 42 int ret; \ 43 ret = mipi_dsi_dcs_write_buffer(dsi, d, ARRAY_SIZE(d)); \ 44 if (ret < 0) \ 45 return ret; \ 46 } while (0) 47 48 static void jdi_fhd_r63452_reset(struct jdi_fhd_r63452 *ctx) 49 { 50 gpiod_set_value_cansleep(ctx->reset_gpio, 0); 51 usleep_range(10000, 11000); 52 gpiod_set_value_cansleep(ctx->reset_gpio, 1); 53 usleep_range(1000, 2000); 54 gpiod_set_value_cansleep(ctx->reset_gpio, 0); 55 usleep_range(10000, 11000); 56 } 57 58 static int jdi_fhd_r63452_on(struct jdi_fhd_r63452 *ctx) 59 { 60 struct mipi_dsi_device *dsi = ctx->dsi; 61 struct device *dev = &dsi->dev; 62 int ret; 63 64 dsi->mode_flags |= MIPI_DSI_MODE_LPM; 65 66 dsi_generic_write_seq(dsi, 0xb0, 0x00); 67 dsi_generic_write_seq(dsi, 0xd6, 0x01); 68 dsi_generic_write_seq(dsi, 0xec, 69 0x64, 0xdc, 0xec, 0x3b, 0x52, 0x00, 0x0b, 0x0b, 70 0x13, 0x15, 0x68, 0x0b, 0xb5); 71 dsi_generic_write_seq(dsi, 0xb0, 0x03); 72 73 ret = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK); 74 if (ret < 0) { 75 dev_err(dev, "Failed to set tear on: %d\n", ret); 76 return ret; 77 } 78 79 dsi_dcs_write_seq(dsi, MIPI_DCS_SET_ADDRESS_MODE, 0x00); 80 81 ret = mipi_dsi_dcs_set_pixel_format(dsi, 0x77); 82 if (ret < 0) { 83 dev_err(dev, "Failed to set pixel format: %d\n", ret); 84 return ret; 85 } 86 87 ret = mipi_dsi_dcs_set_column_address(dsi, 0x0000, 0x0437); 88 if (ret < 0) { 89 dev_err(dev, "Failed to set column address: %d\n", ret); 90 return ret; 91 } 92 93 ret = mipi_dsi_dcs_set_page_address(dsi, 0x0000, 0x077f); 94 if (ret < 0) { 95 dev_err(dev, "Failed to set page address: %d\n", ret); 96 return ret; 97 } 98 99 ret = mipi_dsi_dcs_set_tear_scanline(dsi, 0x0000); 100 if (ret < 0) { 101 dev_err(dev, "Failed to set tear scanline: %d\n", ret); 102 return ret; 103 } 104 105 ret = mipi_dsi_dcs_set_display_brightness(dsi, 0x00ff); 106 if (ret < 0) { 107 dev_err(dev, "Failed to set display brightness: %d\n", ret); 108 return ret; 109 } 110 111 dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x24); 112 dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_POWER_SAVE, 0x00); 113 dsi_dcs_write_seq(dsi, MIPI_DCS_SET_CABC_MIN_BRIGHTNESS, 0x00); 114 dsi_dcs_write_seq(dsi, 0x84, 0x00); 115 116 ret = mipi_dsi_dcs_set_display_on(dsi); 117 if (ret < 0) { 118 dev_err(dev, "Failed to set display on: %d\n", ret); 119 return ret; 120 } 121 msleep(20); 122 123 ret = mipi_dsi_dcs_exit_sleep_mode(dsi); 124 if (ret < 0) { 125 dev_err(dev, "Failed to exit sleep mode: %d\n", ret); 126 return ret; 127 } 128 msleep(80); 129 130 dsi_generic_write_seq(dsi, 0xb0, 0x04); 131 dsi_dcs_write_seq(dsi, 0x84, 0x00); 132 dsi_generic_write_seq(dsi, 0xc8, 0x11); 133 dsi_generic_write_seq(dsi, 0xb0, 0x03); 134 135 return 0; 136 } 137 138 static int jdi_fhd_r63452_off(struct jdi_fhd_r63452 *ctx) 139 { 140 struct mipi_dsi_device *dsi = ctx->dsi; 141 struct device *dev = &dsi->dev; 142 int ret; 143 144 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; 145 146 dsi_generic_write_seq(dsi, 0xb0, 0x00); 147 dsi_generic_write_seq(dsi, 0xd6, 0x01); 148 dsi_generic_write_seq(dsi, 0xec, 149 0x64, 0xdc, 0xec, 0x3b, 0x52, 0x00, 0x0b, 0x0b, 150 0x13, 0x15, 0x68, 0x0b, 0x95); 151 dsi_generic_write_seq(dsi, 0xb0, 0x03); 152 153 ret = mipi_dsi_dcs_set_display_off(dsi); 154 if (ret < 0) { 155 dev_err(dev, "Failed to set display off: %d\n", ret); 156 return ret; 157 } 158 usleep_range(2000, 3000); 159 160 ret = mipi_dsi_dcs_enter_sleep_mode(dsi); 161 if (ret < 0) { 162 dev_err(dev, "Failed to enter sleep mode: %d\n", ret); 163 return ret; 164 } 165 msleep(120); 166 167 return 0; 168 } 169 170 static int jdi_fhd_r63452_prepare(struct drm_panel *panel) 171 { 172 struct jdi_fhd_r63452 *ctx = to_jdi_fhd_r63452(panel); 173 struct device *dev = &ctx->dsi->dev; 174 int ret; 175 176 if (ctx->prepared) 177 return 0; 178 179 jdi_fhd_r63452_reset(ctx); 180 181 ret = jdi_fhd_r63452_on(ctx); 182 if (ret < 0) { 183 dev_err(dev, "Failed to initialize panel: %d\n", ret); 184 gpiod_set_value_cansleep(ctx->reset_gpio, 1); 185 return ret; 186 } 187 188 ctx->prepared = true; 189 return 0; 190 } 191 192 static int jdi_fhd_r63452_unprepare(struct drm_panel *panel) 193 { 194 struct jdi_fhd_r63452 *ctx = to_jdi_fhd_r63452(panel); 195 struct device *dev = &ctx->dsi->dev; 196 int ret; 197 198 if (!ctx->prepared) 199 return 0; 200 201 ret = jdi_fhd_r63452_off(ctx); 202 if (ret < 0) 203 dev_err(dev, "Failed to un-initialize panel: %d\n", ret); 204 205 gpiod_set_value_cansleep(ctx->reset_gpio, 1); 206 207 ctx->prepared = false; 208 return 0; 209 } 210 211 static const struct drm_display_mode jdi_fhd_r63452_mode = { 212 .clock = (1080 + 120 + 16 + 40) * (1920 + 4 + 2 + 4) * 60 / 1000, 213 .hdisplay = 1080, 214 .hsync_start = 1080 + 120, 215 .hsync_end = 1080 + 120 + 16, 216 .htotal = 1080 + 120 + 16 + 40, 217 .vdisplay = 1920, 218 .vsync_start = 1920 + 4, 219 .vsync_end = 1920 + 4 + 2, 220 .vtotal = 1920 + 4 + 2 + 4, 221 .width_mm = 64, 222 .height_mm = 114, 223 }; 224 225 static int jdi_fhd_r63452_get_modes(struct drm_panel *panel, 226 struct drm_connector *connector) 227 { 228 struct drm_display_mode *mode; 229 230 mode = drm_mode_duplicate(connector->dev, &jdi_fhd_r63452_mode); 231 if (!mode) 232 return -ENOMEM; 233 234 drm_mode_set_name(mode); 235 236 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; 237 connector->display_info.width_mm = mode->width_mm; 238 connector->display_info.height_mm = mode->height_mm; 239 drm_mode_probed_add(connector, mode); 240 241 return 1; 242 } 243 244 static const struct drm_panel_funcs jdi_fhd_r63452_panel_funcs = { 245 .prepare = jdi_fhd_r63452_prepare, 246 .unprepare = jdi_fhd_r63452_unprepare, 247 .get_modes = jdi_fhd_r63452_get_modes, 248 }; 249 250 static int jdi_fhd_r63452_probe(struct mipi_dsi_device *dsi) 251 { 252 struct device *dev = &dsi->dev; 253 struct jdi_fhd_r63452 *ctx; 254 int ret; 255 256 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); 257 if (!ctx) 258 return -ENOMEM; 259 260 ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); 261 if (IS_ERR(ctx->reset_gpio)) 262 return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio), 263 "Failed to get reset-gpios\n"); 264 265 ctx->dsi = dsi; 266 mipi_dsi_set_drvdata(dsi, ctx); 267 268 dsi->lanes = 4; 269 dsi->format = MIPI_DSI_FMT_RGB888; 270 dsi->mode_flags = MIPI_DSI_MODE_VIDEO_BURST | 271 MIPI_DSI_CLOCK_NON_CONTINUOUS; 272 273 drm_panel_init(&ctx->panel, dev, &jdi_fhd_r63452_panel_funcs, 274 DRM_MODE_CONNECTOR_DSI); 275 276 ret = drm_panel_of_backlight(&ctx->panel); 277 if (ret) 278 return dev_err_probe(dev, ret, "Failed to get backlight\n"); 279 280 drm_panel_add(&ctx->panel); 281 282 ret = mipi_dsi_attach(dsi); 283 if (ret < 0) { 284 dev_err(dev, "Failed to attach to DSI host: %d\n", ret); 285 return ret; 286 } 287 288 return 0; 289 } 290 291 static void jdi_fhd_r63452_remove(struct mipi_dsi_device *dsi) 292 { 293 struct jdi_fhd_r63452 *ctx = mipi_dsi_get_drvdata(dsi); 294 int ret; 295 296 ret = mipi_dsi_detach(dsi); 297 if (ret < 0) 298 dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret); 299 300 drm_panel_remove(&ctx->panel); 301 } 302 303 static const struct of_device_id jdi_fhd_r63452_of_match[] = { 304 { .compatible = "jdi,fhd-r63452" }, 305 { /* sentinel */ } 306 }; 307 MODULE_DEVICE_TABLE(of, jdi_fhd_r63452_of_match); 308 309 static struct mipi_dsi_driver jdi_fhd_r63452_driver = { 310 .probe = jdi_fhd_r63452_probe, 311 .remove = jdi_fhd_r63452_remove, 312 .driver = { 313 .name = "panel-jdi-fhd-r63452", 314 .of_match_table = jdi_fhd_r63452_of_match, 315 }, 316 }; 317 module_mipi_dsi_driver(jdi_fhd_r63452_driver); 318 319 MODULE_AUTHOR("Raffaele Tranquillini <raffaele.tranquillini@gmail.com>"); 320 MODULE_DESCRIPTION("DRM driver for JDI FHD R63452 DSI panel, command mode"); 321 MODULE_LICENSE("GPL v2"); 322