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