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 .vrefresh = 60, 107 108 .width_mm = 154, 109 .height_mm = 85, 110 }; 111 112 static int rb070d30_panel_get_modes(struct drm_panel *panel, 113 struct drm_connector *connector) 114 { 115 struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel); 116 struct drm_display_mode *mode; 117 static const u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24; 118 119 mode = drm_mode_duplicate(connector->dev, &default_mode); 120 if (!mode) { 121 DRM_DEV_ERROR(&ctx->dsi->dev, 122 "Failed to add mode " DRM_MODE_FMT "\n", 123 DRM_MODE_ARG(&default_mode)); 124 return -EINVAL; 125 } 126 127 drm_mode_set_name(mode); 128 129 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; 130 drm_mode_probed_add(connector, mode); 131 132 connector->display_info.bpc = 8; 133 connector->display_info.width_mm = mode->width_mm; 134 connector->display_info.height_mm = mode->height_mm; 135 drm_display_info_set_bus_formats(&connector->display_info, 136 &bus_format, 1); 137 138 return 1; 139 } 140 141 static const struct drm_panel_funcs rb070d30_panel_funcs = { 142 .get_modes = rb070d30_panel_get_modes, 143 .prepare = rb070d30_panel_prepare, 144 .enable = rb070d30_panel_enable, 145 .disable = rb070d30_panel_disable, 146 .unprepare = rb070d30_panel_unprepare, 147 }; 148 149 static int rb070d30_panel_dsi_probe(struct mipi_dsi_device *dsi) 150 { 151 struct rb070d30_panel *ctx; 152 int ret; 153 154 ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL); 155 if (!ctx) 156 return -ENOMEM; 157 158 ctx->supply = devm_regulator_get(&dsi->dev, "vcc-lcd"); 159 if (IS_ERR(ctx->supply)) 160 return PTR_ERR(ctx->supply); 161 162 mipi_dsi_set_drvdata(dsi, ctx); 163 ctx->dsi = dsi; 164 165 drm_panel_init(&ctx->panel, &dsi->dev, &rb070d30_panel_funcs, 166 DRM_MODE_CONNECTOR_DSI); 167 168 ctx->gpios.reset = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW); 169 if (IS_ERR(ctx->gpios.reset)) { 170 DRM_DEV_ERROR(&dsi->dev, "Couldn't get our reset GPIO\n"); 171 return PTR_ERR(ctx->gpios.reset); 172 } 173 174 ctx->gpios.power = devm_gpiod_get(&dsi->dev, "power", GPIOD_OUT_LOW); 175 if (IS_ERR(ctx->gpios.power)) { 176 DRM_DEV_ERROR(&dsi->dev, "Couldn't get our power GPIO\n"); 177 return PTR_ERR(ctx->gpios.power); 178 } 179 180 /* 181 * We don't change the state of that GPIO later on but we need 182 * to force it into a low state. 183 */ 184 ctx->gpios.updn = devm_gpiod_get(&dsi->dev, "updn", GPIOD_OUT_LOW); 185 if (IS_ERR(ctx->gpios.updn)) { 186 DRM_DEV_ERROR(&dsi->dev, "Couldn't get our updn GPIO\n"); 187 return PTR_ERR(ctx->gpios.updn); 188 } 189 190 /* 191 * We don't change the state of that GPIO later on but we need 192 * to force it into a low state. 193 */ 194 ctx->gpios.shlr = devm_gpiod_get(&dsi->dev, "shlr", GPIOD_OUT_LOW); 195 if (IS_ERR(ctx->gpios.shlr)) { 196 DRM_DEV_ERROR(&dsi->dev, "Couldn't get our shlr GPIO\n"); 197 return PTR_ERR(ctx->gpios.shlr); 198 } 199 200 ret = drm_panel_of_backlight(&ctx->panel); 201 if (ret) 202 return ret; 203 204 ret = drm_panel_add(&ctx->panel); 205 if (ret < 0) 206 return ret; 207 208 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_LPM; 209 dsi->format = MIPI_DSI_FMT_RGB888; 210 dsi->lanes = 4; 211 212 return mipi_dsi_attach(dsi); 213 } 214 215 static int rb070d30_panel_dsi_remove(struct mipi_dsi_device *dsi) 216 { 217 struct rb070d30_panel *ctx = mipi_dsi_get_drvdata(dsi); 218 219 mipi_dsi_detach(dsi); 220 drm_panel_remove(&ctx->panel); 221 222 return 0; 223 } 224 225 static const struct of_device_id rb070d30_panel_of_match[] = { 226 { .compatible = "ronbo,rb070d30" }, 227 { /* sentinel */ }, 228 }; 229 MODULE_DEVICE_TABLE(of, rb070d30_panel_of_match); 230 231 static struct mipi_dsi_driver rb070d30_panel_driver = { 232 .probe = rb070d30_panel_dsi_probe, 233 .remove = rb070d30_panel_dsi_remove, 234 .driver = { 235 .name = "panel-ronbo-rb070d30", 236 .of_match_table = rb070d30_panel_of_match, 237 }, 238 }; 239 module_mipi_dsi_driver(rb070d30_panel_driver); 240 241 MODULE_AUTHOR("Boris Brezillon <boris.brezillon@bootlin.com>"); 242 MODULE_AUTHOR("Konstantin Sudakov <k.sudakov@integrasources.com>"); 243 MODULE_DESCRIPTION("Ronbo RB070D30 Panel Driver"); 244 MODULE_LICENSE("GPL"); 245