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