drivers/gpu/drm/panel/panel-ronbo-rb070d30.c

   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         return mipi_dsi_attach(dsi);
 203 }
 204
 205 static int rb070d30_panel_dsi_remove(struct mipi_dsi_device *dsi)
 206 {
 207         struct rb070d30_panel *ctx = mipi_dsi_get_drvdata(dsi);
 208
 209         mipi_dsi_detach(dsi);
 210         drm_panel_remove(&ctx->panel);
 211
 212         return 0;
 213 }
 214
 215 static const struct of_device_id rb070d30_panel_of_match[] = {
 216         { .compatible = "ronbo,rb070d30" },
 217         { /* sentinel */ },
 218 };
 219 MODULE_DEVICE_TABLE(of, rb070d30_panel_of_match);
 220
 221 static struct mipi_dsi_driver rb070d30_panel_driver = {
 222         .probe = rb070d30_panel_dsi_probe,
 223         .remove = rb070d30_panel_dsi_remove,
 224         .driver = {
 225                 .name = "panel-ronbo-rb070d30",
 226                 .of_match_table = rb070d30_panel_of_match,
 227         },
 228 };
 229 module_mipi_dsi_driver(rb070d30_panel_driver);
 230
 231 MODULE_AUTHOR("Boris Brezillon <boris.brezillon@bootlin.com>");
 232 MODULE_AUTHOR("Konstantin Sudakov <k.sudakov@integrasources.com>");
 233 MODULE_DESCRIPTION("Ronbo RB070D30 Panel Driver");
 234 MODULE_LICENSE("GPL");