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 #include <linux/of.h> 19 20 #include <linux/gpio/consumer.h> 21 #include <linux/regulator/consumer.h> 22 23 #include <drm/drm_connector.h> 24 #include <drm/drm_mipi_dsi.h> 25 #include <drm/drm_modes.h> 26 #include <drm/drm_panel.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 dev_err(&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 80 return mipi_dsi_dcs_exit_sleep_mode(ctx->dsi); 81 } 82 83 static int rb070d30_panel_disable(struct drm_panel *panel) 84 { 85 struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel); 86 87 return mipi_dsi_dcs_enter_sleep_mode(ctx->dsi); 88 } 89 90 /* Default timings */ 91 static const struct drm_display_mode default_mode = { 92 .clock = 51206, 93 .hdisplay = 1024, 94 .hsync_start = 1024 + 160, 95 .hsync_end = 1024 + 160 + 80, 96 .htotal = 1024 + 160 + 80 + 80, 97 .vdisplay = 600, 98 .vsync_start = 600 + 12, 99 .vsync_end = 600 + 12 + 10, 100 .vtotal = 600 + 12 + 10 + 13, 101 102 .width_mm = 154, 103 .height_mm = 85, 104 }; 105 106 static int rb070d30_panel_get_modes(struct drm_panel *panel, 107 struct drm_connector *connector) 108 { 109 struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel); 110 struct drm_display_mode *mode; 111 static const u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24; 112 113 mode = drm_mode_duplicate(connector->dev, &default_mode); 114 if (!mode) { 115 dev_err(&ctx->dsi->dev, "Failed to add mode " DRM_MODE_FMT "\n", 116 DRM_MODE_ARG(&default_mode)); 117 return -EINVAL; 118 } 119 120 drm_mode_set_name(mode); 121 122 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; 123 drm_mode_probed_add(connector, mode); 124 125 connector->display_info.bpc = 8; 126 connector->display_info.width_mm = mode->width_mm; 127 connector->display_info.height_mm = mode->height_mm; 128 drm_display_info_set_bus_formats(&connector->display_info, 129 &bus_format, 1); 130 131 return 1; 132 } 133 134 static const struct drm_panel_funcs rb070d30_panel_funcs = { 135 .get_modes = rb070d30_panel_get_modes, 136 .prepare = rb070d30_panel_prepare, 137 .enable = rb070d30_panel_enable, 138 .disable = rb070d30_panel_disable, 139 .unprepare = rb070d30_panel_unprepare, 140 }; 141 142 static int rb070d30_panel_dsi_probe(struct mipi_dsi_device *dsi) 143 { 144 struct rb070d30_panel *ctx; 145 int ret; 146 147 ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL); 148 if (!ctx) 149 return -ENOMEM; 150 151 ctx->supply = devm_regulator_get(&dsi->dev, "vcc-lcd"); 152 if (IS_ERR(ctx->supply)) 153 return PTR_ERR(ctx->supply); 154 155 mipi_dsi_set_drvdata(dsi, ctx); 156 ctx->dsi = dsi; 157 158 drm_panel_init(&ctx->panel, &dsi->dev, &rb070d30_panel_funcs, 159 DRM_MODE_CONNECTOR_DSI); 160 161 ctx->gpios.reset = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW); 162 if (IS_ERR(ctx->gpios.reset)) { 163 dev_err(&dsi->dev, "Couldn't get our reset GPIO\n"); 164 return PTR_ERR(ctx->gpios.reset); 165 } 166 167 ctx->gpios.power = devm_gpiod_get(&dsi->dev, "power", GPIOD_OUT_LOW); 168 if (IS_ERR(ctx->gpios.power)) { 169 dev_err(&dsi->dev, "Couldn't get our power GPIO\n"); 170 return PTR_ERR(ctx->gpios.power); 171 } 172 173 /* 174 * We don't change the state of that GPIO later on but we need 175 * to force it into a low state. 176 */ 177 ctx->gpios.updn = devm_gpiod_get(&dsi->dev, "updn", GPIOD_OUT_LOW); 178 if (IS_ERR(ctx->gpios.updn)) { 179 dev_err(&dsi->dev, "Couldn't get our updn GPIO\n"); 180 return PTR_ERR(ctx->gpios.updn); 181 } 182 183 /* 184 * We don't change the state of that GPIO later on but we need 185 * to force it into a low state. 186 */ 187 ctx->gpios.shlr = devm_gpiod_get(&dsi->dev, "shlr", GPIOD_OUT_LOW); 188 if (IS_ERR(ctx->gpios.shlr)) { 189 dev_err(&dsi->dev, "Couldn't get our shlr GPIO\n"); 190 return PTR_ERR(ctx->gpios.shlr); 191 } 192 193 ret = drm_panel_of_backlight(&ctx->panel); 194 if (ret) 195 return ret; 196 197 drm_panel_add(&ctx->panel); 198 199 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_LPM; 200 dsi->format = MIPI_DSI_FMT_RGB888; 201 dsi->lanes = 4; 202 203 ret = mipi_dsi_attach(dsi); 204 if (ret < 0) { 205 drm_panel_remove(&ctx->panel); 206 return ret; 207 } 208 209 return 0; 210 } 211 212 static void rb070d30_panel_dsi_remove(struct mipi_dsi_device *dsi) 213 { 214 struct rb070d30_panel *ctx = mipi_dsi_get_drvdata(dsi); 215 216 mipi_dsi_detach(dsi); 217 drm_panel_remove(&ctx->panel); 218 } 219 220 static const struct of_device_id rb070d30_panel_of_match[] = { 221 { .compatible = "ronbo,rb070d30" }, 222 { /* sentinel */ }, 223 }; 224 MODULE_DEVICE_TABLE(of, rb070d30_panel_of_match); 225 226 static struct mipi_dsi_driver rb070d30_panel_driver = { 227 .probe = rb070d30_panel_dsi_probe, 228 .remove = rb070d30_panel_dsi_remove, 229 .driver = { 230 .name = "panel-ronbo-rb070d30", 231 .of_match_table = rb070d30_panel_of_match, 232 }, 233 }; 234 module_mipi_dsi_driver(rb070d30_panel_driver); 235 236 MODULE_AUTHOR("Boris Brezillon <boris.brezillon@bootlin.com>"); 237 MODULE_AUTHOR("Konstantin Sudakov <k.sudakov@integrasources.com>"); 238 MODULE_DESCRIPTION("Ronbo RB070D30 Panel Driver"); 239 MODULE_LICENSE("GPL"); 240