1 // SPDX-License-Identifier: GPL-2.0-only 2 // Copyright (c) Kamil Gołda <kamil.golda@protonmail.com> 3 // Copyright (c) Yedaya Katsman <yedaya.ka@gmail.com> 4 // Generated with linux-mdss-dsi-panel-driver-generator from vendor device tree: 5 // Copyright (c) The Linux Foundation. All rights reserved. 6 7 #include <linux/backlight.h> 8 #include <linux/delay.h> 9 #include <linux/gpio/consumer.h> 10 #include <linux/mod_devicetable.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 #include <drm/drm_probe_helper.h> 20 21 struct s6e8fc0_ctx { 22 struct drm_panel panel; 23 struct mipi_dsi_device *dsi; 24 struct regulator_bulk_data *supplies; 25 struct gpio_desc *reset_gpio; 26 }; 27 28 static const struct regulator_bulk_data s6e8fc0_supplies[] = { 29 { .supply = "vdd" }, 30 { .supply = "vci" }, 31 }; 32 33 static inline 34 struct s6e8fc0_ctx *to_s6e8fc0_ctx(struct drm_panel *panel) 35 { 36 return container_of_const(panel, struct s6e8fc0_ctx, panel); 37 } 38 39 static void s6e8fc0_m1906f9_reset(struct s6e8fc0_ctx *ctx) 40 { 41 gpiod_set_value_cansleep(ctx->reset_gpio, 0); 42 usleep_range(12000, 13000); 43 gpiod_set_value_cansleep(ctx->reset_gpio, 1); 44 usleep_range(2000, 3000); 45 gpiod_set_value_cansleep(ctx->reset_gpio, 0); 46 usleep_range(10000, 11000); 47 } 48 49 #define s6e8fc0_test_key_on_lvl2(ctx) \ 50 mipi_dsi_dcs_write_seq_multi(ctx, 0xf0, 0x5a, 0x5a) 51 #define s6e8fc0_test_key_off_lvl2(ctx) \ 52 mipi_dsi_dcs_write_seq_multi(ctx, 0xf0, 0xa5, 0xa5) 53 #define s6e8fc0_test_key_on_lvl3(ctx) \ 54 mipi_dsi_dcs_write_seq_multi(ctx, 0xfc, 0x5a, 0x5a) 55 #define s6e8fc0_test_key_off_lvl3(ctx) \ 56 mipi_dsi_dcs_write_seq_multi(ctx, 0xfc, 0xa5, 0xa5) 57 58 static int s6e8fc0_m1906f9_on(struct s6e8fc0_ctx *ctx) 59 { 60 struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi }; 61 62 s6e8fc0_test_key_on_lvl3(&dsi_ctx); 63 64 mipi_dsi_dcs_set_display_brightness_multi(&dsi_ctx, 0x0000); 65 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY, 66 0x20); 67 mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx); 68 mipi_dsi_msleep(&dsi_ctx, 50); 69 mipi_dsi_dcs_set_display_on_multi(&dsi_ctx); 70 71 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb0, 0x04, 0xed); 72 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xed, 73 0xe4, 0x08, 0x96, 0xa4, 0x2a, 0x72, 0xe2, 74 0xca, 0x00); 75 s6e8fc0_test_key_off_lvl3(&dsi_ctx); 76 s6e8fc0_test_key_on_lvl2(&dsi_ctx); 77 s6e8fc0_test_key_on_lvl3(&dsi_ctx); 78 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xe1, 0x93); 79 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb0, 0x05, 0xf4); 80 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf4, 0x03); 81 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xed, 0x01, 0x81, 0x04); 82 s6e8fc0_test_key_off_lvl2(&dsi_ctx); 83 s6e8fc0_test_key_off_lvl3(&dsi_ctx); 84 85 return dsi_ctx.accum_err; 86 } 87 88 static int s6e8fc0_m1906f9_off(struct s6e8fc0_ctx *ctx) 89 { 90 struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi }; 91 92 mipi_dsi_dcs_set_display_off_multi(&dsi_ctx); 93 mipi_dsi_msleep(&dsi_ctx, 20); 94 mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx); 95 mipi_dsi_msleep(&dsi_ctx, 120); 96 97 return dsi_ctx.accum_err; 98 } 99 100 static int s6e8fc0_m1906f9_prepare(struct drm_panel *panel) 101 { 102 struct s6e8fc0_ctx *ctx = to_s6e8fc0_ctx(panel); 103 struct device *dev = &ctx->dsi->dev; 104 int ret; 105 106 ret = regulator_bulk_enable(ARRAY_SIZE(s6e8fc0_supplies), ctx->supplies); 107 if (ret < 0) { 108 dev_err(dev, "Failed to enable regulators: %d\n", ret); 109 return ret; 110 } 111 112 s6e8fc0_m1906f9_reset(ctx); 113 114 ret = s6e8fc0_m1906f9_on(ctx); 115 if (ret < 0) { 116 dev_err(dev, "Failed to initialize panel: %d\n", ret); 117 gpiod_set_value_cansleep(ctx->reset_gpio, 1); 118 regulator_bulk_disable(ARRAY_SIZE(s6e8fc0_supplies), ctx->supplies); 119 return ret; 120 } 121 122 return 0; 123 } 124 125 static int s6e8fc0_m1906f9_unprepare(struct drm_panel *panel) 126 { 127 struct s6e8fc0_ctx *ctx = to_s6e8fc0_ctx(panel); 128 struct device *dev = &ctx->dsi->dev; 129 int ret; 130 131 ret = s6e8fc0_m1906f9_off(ctx); 132 if (ret < 0) 133 dev_err(dev, "Failed to un-initialize panel: %d\n", ret); 134 135 gpiod_set_value_cansleep(ctx->reset_gpio, 1); 136 regulator_bulk_disable(ARRAY_SIZE(s6e8fc0_supplies), ctx->supplies); 137 138 return 0; 139 } 140 141 static const struct drm_display_mode s6e8fc0_m1906f9_samsungp_mode = { 142 .clock = (720 + 350 + 40 + 294) * (1560 + 17 + 2 + 5) * 60 / 1000, 143 .hdisplay = 720, 144 .hsync_start = 720 + 350, 145 .hsync_end = 720 + 350 + 40, 146 .htotal = 720 + 350 + 40 + 294, 147 .vdisplay = 1560, 148 .vsync_start = 1560 + 17, 149 .vsync_end = 1560 + 17 + 2, 150 .vtotal = 1560 + 17 + 2 + 5, 151 .width_mm = 65, 152 .height_mm = 140, 153 .type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED, 154 }; 155 156 static int s6e8fc0_m1906f9_get_modes(struct drm_panel *panel, 157 struct drm_connector *connector) 158 { 159 return drm_connector_helper_get_modes_fixed(connector, &s6e8fc0_m1906f9_samsungp_mode); 160 } 161 162 static const struct drm_panel_funcs s6e8fc0_m1906f9_panel_funcs = { 163 .prepare = s6e8fc0_m1906f9_prepare, 164 .unprepare = s6e8fc0_m1906f9_unprepare, 165 .get_modes = s6e8fc0_m1906f9_get_modes, 166 }; 167 168 static int s6e8fc0_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_large(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 s6e8fc0_bl_get_brightness(struct backlight_device *bl) 186 { 187 struct mipi_dsi_device *dsi = bl_get_data(bl); 188 u16 brightness; 189 int ret; 190 191 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; 192 193 ret = mipi_dsi_dcs_get_display_brightness_large(dsi, &brightness); 194 if (ret < 0) 195 return ret; 196 197 dsi->mode_flags |= MIPI_DSI_MODE_LPM; 198 199 return brightness; 200 } 201 202 static const struct backlight_ops s6e8fc0_bl_ops = { 203 .update_status = s6e8fc0_bl_update_status, 204 .get_brightness = s6e8fc0_bl_get_brightness, 205 }; 206 207 static struct backlight_device * 208 s6e8fc0_m1906f9_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 = 512, 214 .max_brightness = 1023, 215 }; 216 217 return devm_backlight_device_register(dev, dev_name(dev), dev, dsi, 218 &s6e8fc0_bl_ops, &props); 219 } 220 221 static int s6e8fc0_m1906f9_probe(struct mipi_dsi_device *dsi) 222 { 223 struct device *dev = &dsi->dev; 224 struct s6e8fc0_ctx *ctx; 225 int ret; 226 227 ctx = devm_drm_panel_alloc(dev, struct s6e8fc0_ctx, panel, 228 &s6e8fc0_m1906f9_panel_funcs, 229 DRM_MODE_CONNECTOR_DSI); 230 if (IS_ERR(ctx)) 231 return PTR_ERR(ctx); 232 233 ret = devm_regulator_bulk_get_const(dev, 234 ARRAY_SIZE(s6e8fc0_supplies), 235 s6e8fc0_supplies, 236 &ctx->supplies); 237 if (ret < 0) 238 return ret; 239 240 ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); 241 if (IS_ERR(ctx->reset_gpio)) 242 return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio), 243 "Failed to get reset-gpios\n"); 244 245 ctx->dsi = dsi; 246 mipi_dsi_set_drvdata(dsi, ctx); 247 248 dsi->lanes = 4; 249 dsi->format = MIPI_DSI_FMT_RGB888; 250 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | 251 MIPI_DSI_CLOCK_NON_CONTINUOUS; 252 253 ctx->panel.prepare_prev_first = true; 254 255 ctx->panel.backlight = s6e8fc0_m1906f9_create_backlight(dsi); 256 if (IS_ERR(ctx->panel.backlight)) 257 return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight), 258 "Failed to create backlight\n"); 259 260 drm_panel_add(&ctx->panel); 261 262 ret = mipi_dsi_attach(dsi); 263 if (ret < 0) { 264 drm_panel_remove(&ctx->panel); 265 return dev_err_probe(dev, ret, "Failed to attach to DSI host\n"); 266 } 267 268 return 0; 269 } 270 271 static void s6e8fc0_remove(struct mipi_dsi_device *dsi) 272 { 273 struct s6e8fc0_ctx *ctx = mipi_dsi_get_drvdata(dsi); 274 int ret; 275 276 ret = mipi_dsi_detach(dsi); 277 if (ret < 0) 278 dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret); 279 280 drm_panel_remove(&ctx->panel); 281 } 282 283 static const struct of_device_id samsung_s6e8fc0_of_match[] = { 284 { .compatible = "samsung,s6e8fc0-m1906f9" }, 285 { /* sentinel */ } 286 }; 287 MODULE_DEVICE_TABLE(of, samsung_s6e8fc0_of_match); 288 289 static struct mipi_dsi_driver s6e8fc0_driver = { 290 .probe = s6e8fc0_m1906f9_probe, 291 .remove = s6e8fc0_remove, 292 .driver = { 293 .name = "panel-samsung-s6e8fc0-m1906f9", 294 .of_match_table = samsung_s6e8fc0_of_match, 295 }, 296 }; 297 module_mipi_dsi_driver(s6e8fc0_driver); 298 299 MODULE_AUTHOR("Kamil Gołda <kamil.golda@protonmail.com>"); 300 MODULE_DESCRIPTION("DRM driver for Samsung s6e8fc0 DSI controller"); 301 MODULE_LICENSE("GPL"); 302