1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Driver for the Samsung S6E3FA7 panel. 4 * 5 * Copyright (c) 2022-2024, The Linux Foundation. All rights reserved. 6 * Generated with linux-mdss-dsi-panel-driver-generator from vendor device tree: 7 * Copyright (c) 2013, The Linux Foundation. All rights reserved. 8 */ 9 10 #include <linux/backlight.h> 11 #include <linux/delay.h> 12 #include <linux/gpio/consumer.h> 13 #include <linux/module.h> 14 #include <linux/of.h> 15 16 #include <video/mipi_display.h> 17 18 #include <drm/drm_mipi_dsi.h> 19 #include <drm/drm_modes.h> 20 #include <drm/drm_panel.h> 21 22 struct s6e3fa7_panel { 23 struct drm_panel panel; 24 struct mipi_dsi_device *dsi; 25 struct gpio_desc *reset_gpio; 26 }; 27 28 static inline struct s6e3fa7_panel *to_s6e3fa7_panel(struct drm_panel *panel) 29 { 30 return container_of(panel, struct s6e3fa7_panel, panel); 31 } 32 33 static void s6e3fa7_panel_reset(struct s6e3fa7_panel *ctx) 34 { 35 gpiod_set_value_cansleep(ctx->reset_gpio, 1); 36 usleep_range(1000, 2000); 37 gpiod_set_value_cansleep(ctx->reset_gpio, 0); 38 usleep_range(10000, 11000); 39 } 40 41 static int s6e3fa7_panel_on(struct mipi_dsi_device *dsi) 42 { 43 struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi }; 44 45 mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx); 46 mipi_dsi_msleep(&dsi_ctx, 120); 47 mipi_dsi_dcs_set_tear_on_multi(&dsi_ctx, MIPI_DSI_DCS_TEAR_MODE_VBLANK); 48 49 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf0, 0x5a, 0x5a); 50 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf4, 51 0xbb, 0x23, 0x19, 0x3a, 0x9f, 0x0f, 0x09, 0xc0, 52 0x00, 0xb4, 0x37, 0x70, 0x79, 0x69); 53 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf0, 0xa5, 0xa5); 54 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x20); 55 56 mipi_dsi_dcs_set_display_on_multi(&dsi_ctx); 57 58 return dsi_ctx.accum_err; 59 } 60 61 static int s6e3fa7_panel_prepare(struct drm_panel *panel) 62 { 63 struct s6e3fa7_panel *ctx = to_s6e3fa7_panel(panel); 64 int ret; 65 66 s6e3fa7_panel_reset(ctx); 67 68 ret = s6e3fa7_panel_on(ctx->dsi); 69 if (ret < 0) 70 gpiod_set_value_cansleep(ctx->reset_gpio, 1); 71 72 return ret; 73 } 74 75 static int s6e3fa7_panel_unprepare(struct drm_panel *panel) 76 { 77 struct s6e3fa7_panel *ctx = to_s6e3fa7_panel(panel); 78 79 gpiod_set_value_cansleep(ctx->reset_gpio, 1); 80 81 return 0; 82 } 83 84 static int s6e3fa7_panel_disable(struct drm_panel *panel) 85 { 86 struct s6e3fa7_panel *ctx = to_s6e3fa7_panel(panel); 87 struct mipi_dsi_device *dsi = ctx->dsi; 88 struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi }; 89 90 mipi_dsi_dcs_set_display_off_multi(&dsi_ctx); 91 mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx); 92 mipi_dsi_msleep(&dsi_ctx, 120); 93 94 return dsi_ctx.accum_err; 95 } 96 97 static const struct drm_display_mode s6e3fa7_panel_mode = { 98 .clock = (1080 + 32 + 32 + 78) * (2220 + 32 + 4 + 78) * 60 / 1000, 99 .hdisplay = 1080, 100 .hsync_start = 1080 + 32, 101 .hsync_end = 1080 + 32 + 32, 102 .htotal = 1080 + 32 + 32 + 78, 103 .vdisplay = 2220, 104 .vsync_start = 2220 + 32, 105 .vsync_end = 2220 + 32 + 4, 106 .vtotal = 2220 + 32 + 4 + 78, 107 .width_mm = 62, 108 .height_mm = 127, 109 }; 110 111 static int s6e3fa7_panel_get_modes(struct drm_panel *panel, 112 struct drm_connector *connector) 113 { 114 struct drm_display_mode *mode; 115 116 mode = drm_mode_duplicate(connector->dev, &s6e3fa7_panel_mode); 117 if (!mode) 118 return -ENOMEM; 119 120 drm_mode_set_name(mode); 121 122 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; 123 connector->display_info.width_mm = mode->width_mm; 124 connector->display_info.height_mm = mode->height_mm; 125 drm_mode_probed_add(connector, mode); 126 127 return 1; 128 } 129 130 static const struct drm_panel_funcs s6e3fa7_panel_funcs = { 131 .prepare = s6e3fa7_panel_prepare, 132 .unprepare = s6e3fa7_panel_unprepare, 133 .disable = s6e3fa7_panel_disable, 134 .get_modes = s6e3fa7_panel_get_modes, 135 }; 136 137 static int s6e3fa7_panel_bl_update_status(struct backlight_device *bl) 138 { 139 struct mipi_dsi_device *dsi = bl_get_data(bl); 140 u16 brightness = backlight_get_brightness(bl); 141 int ret; 142 143 ret = mipi_dsi_dcs_set_display_brightness_large(dsi, brightness); 144 if (ret < 0) 145 return ret; 146 147 return 0; 148 } 149 150 static int s6e3fa7_panel_bl_get_brightness(struct backlight_device *bl) 151 { 152 struct mipi_dsi_device *dsi = bl_get_data(bl); 153 u16 brightness; 154 int ret; 155 156 ret = mipi_dsi_dcs_get_display_brightness_large(dsi, &brightness); 157 if (ret < 0) 158 return ret; 159 160 return brightness; 161 } 162 163 static const struct backlight_ops s6e3fa7_panel_bl_ops = { 164 .update_status = s6e3fa7_panel_bl_update_status, 165 .get_brightness = s6e3fa7_panel_bl_get_brightness, 166 }; 167 168 static struct backlight_device * 169 s6e3fa7_panel_create_backlight(struct mipi_dsi_device *dsi) 170 { 171 struct device *dev = &dsi->dev; 172 const struct backlight_properties props = { 173 .type = BACKLIGHT_RAW, 174 .brightness = 1023, 175 .max_brightness = 1023, 176 }; 177 178 return devm_backlight_device_register(dev, dev_name(dev), dev, dsi, 179 &s6e3fa7_panel_bl_ops, &props); 180 } 181 182 static int s6e3fa7_panel_probe(struct mipi_dsi_device *dsi) 183 { 184 struct device *dev = &dsi->dev; 185 struct s6e3fa7_panel *ctx; 186 int ret; 187 188 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); 189 if (!ctx) 190 return -ENOMEM; 191 192 ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); 193 if (IS_ERR(ctx->reset_gpio)) 194 return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio), 195 "Failed to get reset-gpios\n"); 196 197 ctx->dsi = dsi; 198 mipi_dsi_set_drvdata(dsi, ctx); 199 200 dsi->lanes = 4; 201 dsi->format = MIPI_DSI_FMT_RGB888; 202 dsi->mode_flags = MIPI_DSI_MODE_VIDEO_BURST | 203 MIPI_DSI_CLOCK_NON_CONTINUOUS | MIPI_DSI_MODE_LPM; 204 205 drm_panel_init(&ctx->panel, dev, &s6e3fa7_panel_funcs, 206 DRM_MODE_CONNECTOR_DSI); 207 ctx->panel.prepare_prev_first = true; 208 209 ctx->panel.backlight = s6e3fa7_panel_create_backlight(dsi); 210 if (IS_ERR(ctx->panel.backlight)) 211 return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight), 212 "Failed to create backlight\n"); 213 214 drm_panel_add(&ctx->panel); 215 216 ret = mipi_dsi_attach(dsi); 217 if (ret < 0) { 218 dev_err(dev, "Failed to attach to DSI host: %d\n", ret); 219 drm_panel_remove(&ctx->panel); 220 return ret; 221 } 222 223 return 0; 224 } 225 226 static void s6e3fa7_panel_remove(struct mipi_dsi_device *dsi) 227 { 228 struct s6e3fa7_panel *ctx = mipi_dsi_get_drvdata(dsi); 229 int ret; 230 231 ret = mipi_dsi_detach(dsi); 232 if (ret < 0) 233 dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret); 234 235 drm_panel_remove(&ctx->panel); 236 } 237 238 static const struct of_device_id s6e3fa7_panel_of_match[] = { 239 { .compatible = "samsung,s6e3fa7-ams559nk06" }, 240 { /* sentinel */ } 241 }; 242 MODULE_DEVICE_TABLE(of, s6e3fa7_panel_of_match); 243 244 static struct mipi_dsi_driver s6e3fa7_panel_driver = { 245 .probe = s6e3fa7_panel_probe, 246 .remove = s6e3fa7_panel_remove, 247 .driver = { 248 .name = "panel-samsung-s6e3fa7", 249 .of_match_table = s6e3fa7_panel_of_match, 250 }, 251 }; 252 module_mipi_dsi_driver(s6e3fa7_panel_driver); 253 254 MODULE_AUTHOR("Richard Acayan <mailingradian@gmail.com>"); 255 MODULE_DESCRIPTION("DRM driver for Samsung S6E3FA7 command mode DSI panel"); 256 MODULE_LICENSE("GPL"); 257