drivers/gpu/drm/tinydrm/mi0283qt.c

   1 /*
   2  * DRM driver for Multi-Inno MI0283QT panels
   3  *
   4  * Copyright 2016 Noralf Trønnes
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  */
  11
  12 #include <drm/tinydrm/ili9341.h>
  13 #include <drm/tinydrm/mipi-dbi.h>
  14 #include <drm/tinydrm/tinydrm-helpers.h>
  15 #include <linux/delay.h>
  16 #include <linux/gpio/consumer.h>
  17 #include <linux/module.h>
  18 #include <linux/property.h>
  19 #include <linux/regulator/consumer.h>
  20 #include <linux/spi/spi.h>
  21 #include <video/mipi_display.h>
  22
  23 static int mi0283qt_init(struct mipi_dbi *mipi)
  24 {
  25         struct tinydrm_device *tdev = &mipi->tinydrm;
  26         struct device *dev = tdev->drm->dev;
  27         u8 addr_mode;
  28         int ret;
  29
  30         DRM_DEBUG_KMS("\n");
  31
  32         ret = regulator_enable(mipi->regulator);
  33         if (ret) {
  34                 dev_err(dev, "Failed to enable regulator %d\n", ret);
  35                 return ret;
  36         }
  37
  38         /* Avoid flicker by skipping setup if the bootloader has done it */
  39         if (mipi_dbi_display_is_on(mipi))
  40                 return 0;
  41
  42         mipi_dbi_hw_reset(mipi);
  43         ret = mipi_dbi_command(mipi, MIPI_DCS_SOFT_RESET);
  44         if (ret) {
  45                 dev_err(dev, "Error sending command %d\n", ret);
  46                 regulator_disable(mipi->regulator);
  47                 return ret;
  48         }
  49
  50         msleep(20);
  51
  52         mipi_dbi_command(mipi, MIPI_DCS_SET_DISPLAY_OFF);
  53
  54         mipi_dbi_command(mipi, ILI9341_PWCTRLB, 0x00, 0x83, 0x30);
  55         mipi_dbi_command(mipi, ILI9341_PWRSEQ, 0x64, 0x03, 0x12, 0x81);
  56         mipi_dbi_command(mipi, ILI9341_DTCTRLA, 0x85, 0x01, 0x79);
  57         mipi_dbi_command(mipi, ILI9341_PWCTRLA, 0x39, 0x2c, 0x00, 0x34, 0x02);
  58         mipi_dbi_command(mipi, ILI9341_PUMPCTRL, 0x20);
  59         mipi_dbi_command(mipi, ILI9341_DTCTRLB, 0x00, 0x00);
  60
  61         /* Power Control */
  62         mipi_dbi_command(mipi, ILI9341_PWCTRL1, 0x26);
  63         mipi_dbi_command(mipi, ILI9341_PWCTRL2, 0x11);
  64         /* VCOM */
  65         mipi_dbi_command(mipi, ILI9341_VMCTRL1, 0x35, 0x3e);
  66         mipi_dbi_command(mipi, ILI9341_VMCTRL2, 0xbe);
  67
  68         /* Memory Access Control */
  69         mipi_dbi_command(mipi, MIPI_DCS_SET_PIXEL_FORMAT, 0x55);
  70
  71         switch (mipi->rotation) {
  72         default:
  73                 addr_mode = ILI9341_MADCTL_MV | ILI9341_MADCTL_MY |
  74                             ILI9341_MADCTL_MX;
  75                 break;
  76         case 90:
  77                 addr_mode = ILI9341_MADCTL_MY;
  78                 break;
  79         case 180:
  80                 addr_mode = ILI9341_MADCTL_MV;
  81                 break;
  82         case 270:
  83                 addr_mode = ILI9341_MADCTL_MX;
  84                 break;
  85         }
  86         addr_mode |= ILI9341_MADCTL_BGR;
  87         mipi_dbi_command(mipi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
  88
  89         /* Frame Rate */
  90         mipi_dbi_command(mipi, ILI9341_FRMCTR1, 0x00, 0x1b);
  91
  92         /* Gamma */
  93         mipi_dbi_command(mipi, ILI9341_EN3GAM, 0x08);
  94         mipi_dbi_command(mipi, MIPI_DCS_SET_GAMMA_CURVE, 0x01);
  95         mipi_dbi_command(mipi, ILI9341_PGAMCTRL,
  96                        0x1f, 0x1a, 0x18, 0x0a, 0x0f, 0x06, 0x45, 0x87,
  97                        0x32, 0x0a, 0x07, 0x02, 0x07, 0x05, 0x00);
  98         mipi_dbi_command(mipi, ILI9341_NGAMCTRL,
  99                        0x00, 0x25, 0x27, 0x05, 0x10, 0x09, 0x3a, 0x78,
 100                        0x4d, 0x05, 0x18, 0x0d, 0x38, 0x3a, 0x1f);
 101
 102         /* DDRAM */
 103         mipi_dbi_command(mipi, ILI9341_ETMOD, 0x07);
 104
 105         /* Display */
 106         mipi_dbi_command(mipi, ILI9341_DISCTRL, 0x0a, 0x82, 0x27, 0x00);
 107         mipi_dbi_command(mipi, MIPI_DCS_EXIT_SLEEP_MODE);
 108         msleep(100);
 109
 110         mipi_dbi_command(mipi, MIPI_DCS_SET_DISPLAY_ON);
 111         msleep(100);
 112
 113         return 0;
 114 }
 115
 116 static void mi0283qt_fini(void *data)
 117 {
 118         struct mipi_dbi *mipi = data;
 119
 120         DRM_DEBUG_KMS("\n");
 121         regulator_disable(mipi->regulator);
 122 }
 123
 124 static const struct drm_simple_display_pipe_funcs mi0283qt_pipe_funcs = {
 125         .enable = mipi_dbi_pipe_enable,
 126         .disable = mipi_dbi_pipe_disable,
 127         .update = tinydrm_display_pipe_update,
 128         .prepare_fb = tinydrm_display_pipe_prepare_fb,
 129 };
 130
 131 static const struct drm_display_mode mi0283qt_mode = {
 132         TINYDRM_MODE(320, 240, 58, 43),
 133 };
 134
 135 DEFINE_DRM_GEM_CMA_FOPS(mi0283qt_fops);
 136
 137 static struct drm_driver mi0283qt_driver = {
 138         .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME |
 139                                   DRIVER_ATOMIC,
 140         .fops                   = &mi0283qt_fops,
 141         TINYDRM_GEM_DRIVER_OPS,
 142         .lastclose              = tinydrm_lastclose,
 143         .debugfs_init           = mipi_dbi_debugfs_init,
 144         .name                   = "mi0283qt",
 145         .desc                   = "Multi-Inno MI0283QT",
 146         .date                   = "20160614",
 147         .major                  = 1,
 148         .minor                  = 0,
 149 };
 150
 151 static const struct of_device_id mi0283qt_of_match[] = {
 152         { .compatible = "multi-inno,mi0283qt" },
 153         {},
 154 };
 155 MODULE_DEVICE_TABLE(of, mi0283qt_of_match);
 156
 157 static const struct spi_device_id mi0283qt_id[] = {
 158         { "mi0283qt", 0 },
 159         { },
 160 };
 161 MODULE_DEVICE_TABLE(spi, mi0283qt_id);
 162
 163 static int mi0283qt_probe(struct spi_device *spi)
 164 {
 165         struct device *dev = &spi->dev;
 166         struct tinydrm_device *tdev;
 167         struct mipi_dbi *mipi;
 168         struct gpio_desc *dc;
 169         u32 rotation = 0;
 170         int ret;
 171
 172         mipi = devm_kzalloc(dev, sizeof(*mipi), GFP_KERNEL);
 173         if (!mipi)
 174                 return -ENOMEM;
 175
 176         mipi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
 177         if (IS_ERR(mipi->reset)) {
 178                 dev_err(dev, "Failed to get gpio 'reset'\n");
 179                 return PTR_ERR(mipi->reset);
 180         }
 181
 182         dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW);
 183         if (IS_ERR(dc)) {
 184                 dev_err(dev, "Failed to get gpio 'dc'\n");
 185                 return PTR_ERR(dc);
 186         }
 187
 188         mipi->regulator = devm_regulator_get(dev, "power");
 189         if (IS_ERR(mipi->regulator))
 190                 return PTR_ERR(mipi->regulator);
 191
 192         mipi->backlight = tinydrm_of_find_backlight(dev);
 193         if (IS_ERR(mipi->backlight))
 194                 return PTR_ERR(mipi->backlight);
 195
 196         device_property_read_u32(dev, "rotation", &rotation);
 197
 198         ret = mipi_dbi_spi_init(spi, mipi, dc, &mi0283qt_pipe_funcs,
 199                                 &mi0283qt_driver, &mi0283qt_mode, rotation);
 200         if (ret)
 201                 return ret;
 202
 203         ret = mi0283qt_init(mipi);
 204         if (ret)
 205                 return ret;
 206
 207         /* use devres to fini after drm unregister (drv->remove is before) */
 208         ret = devm_add_action(dev, mi0283qt_fini, mipi);
 209         if (ret) {
 210                 mi0283qt_fini(mipi);
 211                 return ret;
 212         }
 213
 214         tdev = &mipi->tinydrm;
 215
 216         ret = devm_tinydrm_register(tdev);
 217         if (ret)
 218                 return ret;
 219
 220         spi_set_drvdata(spi, mipi);
 221
 222         DRM_DEBUG_DRIVER("Initialized %s:%s @%uMHz on minor %d\n",
 223                          tdev->drm->driver->name, dev_name(dev),
 224                          spi->max_speed_hz / 1000000,
 225                          tdev->drm->primary->index);
 226
 227         return 0;
 228 }
 229
 230 static void mi0283qt_shutdown(struct spi_device *spi)
 231 {
 232         struct mipi_dbi *mipi = spi_get_drvdata(spi);
 233
 234         tinydrm_shutdown(&mipi->tinydrm);
 235 }
 236
 237 static int __maybe_unused mi0283qt_pm_suspend(struct device *dev)
 238 {
 239         struct mipi_dbi *mipi = dev_get_drvdata(dev);
 240         int ret;
 241
 242         ret = tinydrm_suspend(&mipi->tinydrm);
 243         if (ret)
 244                 return ret;
 245
 246         mi0283qt_fini(mipi);
 247
 248         return 0;
 249 }
 250
 251 static int __maybe_unused mi0283qt_pm_resume(struct device *dev)
 252 {
 253         struct mipi_dbi *mipi = dev_get_drvdata(dev);
 254         int ret;
 255
 256         ret = mi0283qt_init(mipi);
 257         if (ret)
 258                 return ret;
 259
 260         return tinydrm_resume(&mipi->tinydrm);
 261 }
 262
 263 static const struct dev_pm_ops mi0283qt_pm_ops = {
 264         SET_SYSTEM_SLEEP_PM_OPS(mi0283qt_pm_suspend, mi0283qt_pm_resume)
 265 };
 266
 267 static struct spi_driver mi0283qt_spi_driver = {
 268         .driver = {
 269                 .name = "mi0283qt",
 270                 .owner = THIS_MODULE,
 271                 .of_match_table = mi0283qt_of_match,
 272                 .pm = &mi0283qt_pm_ops,
 273         },
 274         .id_table = mi0283qt_id,
 275         .probe = mi0283qt_probe,
 276         .shutdown = mi0283qt_shutdown,
 277 };
 278 module_spi_driver(mi0283qt_spi_driver);
 279
 280 MODULE_DESCRIPTION("Multi-Inno MI0283QT DRM driver");
 281 MODULE_AUTHOR("Noralf Trønnes");
 282 MODULE_LICENSE("GPL");