1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2018-2019, Bridge Systems BV 4 * Copyright (C) 2018-2019, Bootlin 5 * Copyright (C) 2017, Free Electrons 6 * 7 * This file based on panel-ilitek-ili9881c.c 8 */ 9 10 #include <linux/delay.h> 11 #include <linux/device.h> 12 #include <linux/err.h> 13 #include <linux/errno.h> 14 #include <linux/fb.h> 15 #include <linux/kernel.h> 16 #include <linux/media-bus-format.h> 17 #include <linux/module.h> 18 19 #include <linux/gpio/consumer.h> 20 #include <linux/regulator/consumer.h> 21 22 #include <drm/drm_connector.h> 23 #include <drm/drm_mipi_dsi.h> 24 #include <drm/drm_modes.h> 25 #include <drm/drm_panel.h> 26 #include <drm/drm_print.h> 27 28 struct rb070d30_panel { 29 struct drm_panel panel; 30 struct mipi_dsi_device *dsi; 31 struct regulator *supply; 32 33 struct { 34 struct gpio_desc *power; 35 struct gpio_desc *reset; 36 struct gpio_desc *updn; 37 struct gpio_desc *shlr; 38 } gpios; 39 }; 40 41 static inline struct rb070d30_panel *panel_to_rb070d30_panel(struct drm_panel *panel) 42 { 43 return container_of(panel, struct rb070d30_panel, panel); 44 } 45 46 static int rb070d30_panel_prepare(struct drm_panel *panel) 47 { 48 struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel); 49 int ret; 50 51 ret = regulator_enable(ctx->supply); 52 if (ret < 0) { 53 DRM_DEV_ERROR(&ctx->dsi->dev, "Failed to enable supply: %d\n", ret); 54 return ret; 55 } 56 57 msleep(20); 58 gpiod_set_value(ctx->gpios.power, 1); 59 msleep(20); 60 gpiod_set_value(ctx->gpios.reset, 1); 61 msleep(20); 62 return 0; 63 } 64 65 static int rb070d30_panel_unprepare(struct drm_panel *panel) 66 { 67 struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel); 68 69 gpiod_set_value(ctx->gpios.reset, 0); 70 gpiod_set_value(ctx->gpios.power, 0); 71 regulator_disable(ctx->supply); 72 73 return 0; 74 } 75 76 static int rb070d30_panel_enable(struct drm_panel *panel) 77 { 78 struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel); 79 int ret; 80 81 ret = mipi_dsi_dcs_exit_sleep_mode(ctx->dsi); 82 if (ret) 83 return ret; 84 85 return 0; 86 } 87 88 static int rb070d30_panel_disable(struct drm_panel *panel) 89 { 90 struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel); 91 92 return mipi_dsi_dcs_enter_sleep_mode(ctx->dsi); 93 } 94 95 /* Default timings */ 96 static const struct drm_display_mode default_mode = { 97 .clock = 51206, 98 .hdisplay = 1024, 99 .hsync_start = 1024 + 160, 100 .hsync_end = 1024 + 160 + 80, 101 .htotal = 1024 + 160 + 80 + 80, 102 .vdisplay = 600, 103 .vsync_start = 600 + 12, 104 .vsync_end = 600 + 12 + 10, 105 .vtotal = 600 + 12 + 10 + 13, 106 107 .width_mm = 154, 108 .height_mm = 85, 109 }; 110 111 static int rb070d30_panel_get_modes(struct drm_panel *panel, 112 struct drm_connector *connector) 113 { 114 struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel); 115 struct drm_display_mode *mode; 116 static const u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24; 117 118 mode = drm_mode_duplicate(connector->dev, &default_mode); 119 if (!mode) { 120 DRM_DEV_ERROR(&ctx->dsi->dev, 121 "Failed to add mode " DRM_MODE_FMT "\n", 122 DRM_MODE_ARG(&default_mode)); 123 return -EINVAL; 124 } 125 126 drm_mode_set_name(mode); 127 128 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; 129 drm_mode_probed_add(connector, mode); 130 131 connector->display_info.bpc = 8; 132 connector->display_info.width_mm = mode->width_mm; 133 connector->display_info.height_mm = mode->height_mm; 134 drm_display_info_set_bus_formats(&connector->display_info, 135 &bus_format, 1); 136 137 return 1; 138 } 139 140 static const struct drm_panel_funcs rb070d30_panel_funcs = { 141 .get_modes = rb070d30_panel_get_modes, 142 .prepare = rb070d30_panel_prepare, 143 .enable = rb070d30_panel_enable, 144 .disable = rb070d30_panel_disable, 145 .unprepare = rb070d30_panel_unprepare, 146 }; 147 148 static int rb070d30_panel_dsi_probe(struct mipi_dsi_device *dsi) 149 { 150 struct rb070d30_panel *ctx; 151 int ret; 152 153 ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL); 154 if (!ctx) 155 return -ENOMEM; 156 157 ctx->supply = devm_regulator_get(&dsi->dev, "vcc-lcd"); 158 if (IS_ERR(ctx->supply)) 159 return PTR_ERR(ctx->supply); 160 161 mipi_dsi_set_drvdata(dsi, ctx); 162 ctx->dsi = dsi; 163 164 drm_panel_init(&ctx->panel, &dsi->dev, &rb070d30_panel_funcs, 165 DRM_MODE_CONNECTOR_DSI); 166 167 ctx->gpios.reset = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW); 168 if (IS_ERR(ctx->gpios.reset)) { 169 DRM_DEV_ERROR(&dsi->dev, "Couldn't get our reset GPIO\n"); 170 return PTR_ERR(ctx->gpios.reset); 171 } 172 173 ctx->gpios.power = devm_gpiod_get(&dsi->dev, "power", GPIOD_OUT_LOW); 174 if (IS_ERR(ctx->gpios.power)) { 175 DRM_DEV_ERROR(&dsi->dev, "Couldn't get our power GPIO\n"); 176 return PTR_ERR(ctx->gpios.power); 177 } 178 179 /* 180 * We don't change the state of that GPIO later on but we need 181 * to force it into a low state. 182 */ 183 ctx->gpios.updn = devm_gpiod_get(&dsi->dev, "updn", GPIOD_OUT_LOW); 184 if (IS_ERR(ctx->gpios.updn)) { 185 DRM_DEV_ERROR(&dsi->dev, "Couldn't get our updn GPIO\n"); 186 return PTR_ERR(ctx->gpios.updn); 187 } 188 189 /* 190 * We don't change the state of that GPIO later on but we need 191 * to force it into a low state. 192 */ 193 ctx->gpios.shlr = devm_gpiod_get(&dsi->dev, "shlr", GPIOD_OUT_LOW); 194 if (IS_ERR(ctx->gpios.shlr)) { 195 DRM_DEV_ERROR(&dsi->dev, "Couldn't get our shlr GPIO\n"); 196 return PTR_ERR(ctx->gpios.shlr); 197 } 198 199 ret = drm_panel_of_backlight(&ctx->panel); 200 if (ret) 201 return ret; 202 203 ret = drm_panel_add(&ctx->panel); 204 if (ret < 0) 205 return ret; 206 207 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_LPM; 208 dsi->format = MIPI_DSI_FMT_RGB888; 209 dsi->lanes = 4; 210 211 return mipi_dsi_attach(dsi); 212 } 213 214 static int rb070d30_panel_dsi_remove(struct mipi_dsi_device *dsi) 215 { 216 struct rb070d30_panel *ctx = mipi_dsi_get_drvdata(dsi); 217 218 mipi_dsi_detach(dsi); 219 drm_panel_remove(&ctx->panel); 220 221 return 0; 222 } 223 224 static const struct of_device_id rb070d30_panel_of_match[] = { 225 { .compatible = "ronbo,rb070d30" }, 226 { /* sentinel */ }, 227 }; 228 MODULE_DEVICE_TABLE(of, rb070d30_panel_of_match); 229 230 static struct mipi_dsi_driver rb070d30_panel_driver = { 231 .probe = rb070d30_panel_dsi_probe, 232 .remove = rb070d30_panel_dsi_remove, 233 .driver = { 234 .name = "panel-ronbo-rb070d30", 235 .of_match_table = rb070d30_panel_of_match, 236 }, 237 }; 238 module_mipi_dsi_driver(rb070d30_panel_driver); 239 240 MODULE_AUTHOR("Boris Brezillon <boris.brezillon@bootlin.com>"); 241 MODULE_AUTHOR("Konstantin Sudakov <k.sudakov@integrasources.com>"); 242 MODULE_DESCRIPTION("Ronbo RB070D30 Panel Driver"); 243 MODULE_LICENSE("GPL"); 244