drivers/gpu/drm/tiny/ili9163.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2
   3 #include <linux/backlight.h>
   4 #include <linux/delay.h>
   5 #include <linux/gpio/consumer.h>
   6 #include <linux/module.h>
   7 #include <linux/property.h>
   8 #include <linux/spi/spi.h>
   9
  10 #include <drm/drm_atomic_helper.h>
  11 #include <drm/drm_drv.h>
  12 #include <drm/drm_fb_helper.h>
  13 #include <drm/drm_gem_atomic_helper.h>
  14 #include <drm/drm_gem_cma_helper.h>
  15 #include <drm/drm_mipi_dbi.h>
  16 #include <drm/drm_modeset_helper.h>
  17
  18 #include <video/mipi_display.h>
  19
  20 #define ILI9163_FRMCTR1         0xb1
  21
  22 #define ILI9163_PWCTRL1         0xc0
  23 #define ILI9163_PWCTRL2         0xc1
  24 #define ILI9163_VMCTRL1         0xc5
  25 #define ILI9163_VMCTRL2         0xc7
  26 #define ILI9163_PWCTRLA         0xcb
  27 #define ILI9163_PWCTRLB         0xcf
  28
  29 #define ILI9163_EN3GAM          0xf2
  30
  31 #define ILI9163_MADCTL_BGR      BIT(3)
  32 #define ILI9163_MADCTL_MV       BIT(5)
  33 #define ILI9163_MADCTL_MX       BIT(6)
  34 #define ILI9163_MADCTL_MY       BIT(7)
  35
  36 static void yx240qv29_enable(struct drm_simple_display_pipe *pipe,
  37                              struct drm_crtc_state *crtc_state,
  38                              struct drm_plane_state *plane_state)
  39 {
  40         struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
  41         struct mipi_dbi *dbi = &dbidev->dbi;
  42         u8 addr_mode;
  43         int ret, idx;
  44
  45         if (!drm_dev_enter(pipe->crtc.dev, &idx))
  46                 return;
  47
  48         DRM_DEBUG_KMS("\n");
  49
  50         ret = mipi_dbi_poweron_conditional_reset(dbidev);
  51         if (ret < 0)
  52                 goto out_exit;
  53         if (ret == 1)
  54                 goto out_enable;
  55
  56         /* Gamma */
  57         mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, 0x04);
  58         mipi_dbi_command(dbi, ILI9163_EN3GAM, 0x00);
  59
  60         /* Frame Rate */
  61         mipi_dbi_command(dbi, ILI9163_FRMCTR1, 0x0a, 0x14);
  62
  63         /* Power Control */
  64         mipi_dbi_command(dbi, ILI9163_PWCTRL1, 0x0a, 0x00);
  65         mipi_dbi_command(dbi, ILI9163_PWCTRL2, 0x02);
  66
  67         /* VCOM */
  68         mipi_dbi_command(dbi, ILI9163_VMCTRL1, 0x2f, 0x3e);
  69         mipi_dbi_command(dbi, ILI9163_VMCTRL2, 0x40);
  70
  71         /* Memory Access Control */
  72         mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT);
  73
  74         mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
  75         msleep(100);
  76
  77         mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
  78         msleep(100);
  79
  80 out_enable:
  81         switch (dbidev->rotation) {
  82         default:
  83                 addr_mode = ILI9163_MADCTL_MX | ILI9163_MADCTL_MY;
  84                 break;
  85         case 90:
  86                 addr_mode = ILI9163_MADCTL_MX | ILI9163_MADCTL_MV;
  87                 break;
  88         case 180:
  89                 addr_mode = 0;
  90                 break;
  91         case 270:
  92                 addr_mode = ILI9163_MADCTL_MY | ILI9163_MADCTL_MV;
  93                 break;
  94         }
  95         addr_mode |= ILI9163_MADCTL_BGR;
  96         mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
  97         mipi_dbi_enable_flush(dbidev, crtc_state, plane_state);
  98 out_exit:
  99         drm_dev_exit(idx);
 100 }
 101
 102 static const struct drm_simple_display_pipe_funcs ili9163_pipe_funcs = {
 103         .enable = yx240qv29_enable,
 104         .disable = mipi_dbi_pipe_disable,
 105         .update = mipi_dbi_pipe_update,
 106         .prepare_fb = drm_gem_simple_display_pipe_prepare_fb,
 107 };
 108
 109 static const struct drm_display_mode yx240qv29_mode = {
 110         DRM_SIMPLE_MODE(128, 160, 28, 35),
 111 };
 112
 113 DEFINE_DRM_GEM_CMA_FOPS(ili9163_fops);
 114
 115 static struct drm_driver ili9163_driver = {
 116         .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
 117         .fops                   = &ili9163_fops,
 118         DRM_GEM_CMA_DRIVER_OPS_VMAP,
 119         .debugfs_init           = mipi_dbi_debugfs_init,
 120         .name                   = "ili9163",
 121         .desc                   = "Ilitek ILI9163",
 122         .date                   = "20210208",
 123         .major                  = 1,
 124         .minor                  = 0,
 125 };
 126
 127 static const struct of_device_id ili9163_of_match[] = {
 128         { .compatible = "newhaven,1.8-128160EF" },
 129         { }
 130 };
 131 MODULE_DEVICE_TABLE(of, ili9163_of_match);
 132
 133 static const struct spi_device_id ili9163_id[] = {
 134         { "nhd-1.8-128160EF", 0 },
 135         { }
 136 };
 137 MODULE_DEVICE_TABLE(spi, ili9163_id);
 138
 139 static int ili9163_probe(struct spi_device *spi)
 140 {
 141         struct device *dev = &spi->dev;
 142         struct mipi_dbi_dev *dbidev;
 143         struct drm_device *drm;
 144         struct mipi_dbi *dbi;
 145         struct gpio_desc *dc;
 146         u32 rotation = 0;
 147         int ret;
 148
 149         dbidev = devm_drm_dev_alloc(dev, &ili9163_driver,
 150                                     struct mipi_dbi_dev, drm);
 151         if (IS_ERR(dbidev))
 152                 return PTR_ERR(dbidev);
 153
 154         dbi = &dbidev->dbi;
 155         drm = &dbidev->drm;
 156
 157         spi_set_drvdata(spi, drm);
 158
 159         dbi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
 160         if (IS_ERR(dbi->reset)) {
 161                 DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
 162                 return PTR_ERR(dbi->reset);
 163         }
 164
 165         dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW);
 166         if (IS_ERR(dc)) {
 167                 DRM_DEV_ERROR(dev, "Failed to get gpio 'dc'\n");
 168                 return PTR_ERR(dc);
 169         }
 170
 171         dbidev->backlight = devm_of_find_backlight(dev);
 172         if (IS_ERR(dbidev->backlight))
 173                 return PTR_ERR(dbidev->backlight);
 174
 175         device_property_read_u32(dev, "rotation", &rotation);
 176
 177         ret = mipi_dbi_spi_init(spi, dbi, dc);
 178         if (ret)
 179                 return ret;
 180
 181         ret = mipi_dbi_dev_init(dbidev, &ili9163_pipe_funcs, &yx240qv29_mode, rotation);
 182         if (ret)
 183                 return ret;
 184
 185         drm_mode_config_reset(drm);
 186
 187         ret = drm_dev_register(drm, 0);
 188         if (ret)
 189                 return ret;
 190
 191         drm_fbdev_generic_setup(drm, 0);
 192
 193         return 0;
 194 }
 195
 196 static void ili9163_remove(struct spi_device *spi)
 197 {
 198         struct drm_device *drm = spi_get_drvdata(spi);
 199
 200         drm_dev_unplug(drm);
 201         drm_atomic_helper_shutdown(drm);
 202 }
 203
 204 static void ili9163_shutdown(struct spi_device *spi)
 205 {
 206         drm_atomic_helper_shutdown(spi_get_drvdata(spi));
 207 }
 208
 209 static struct spi_driver ili9163_spi_driver = {
 210         .driver = {
 211                 .name = "ili9163",
 212                 .of_match_table = ili9163_of_match,
 213         },
 214         .id_table = ili9163_id,
 215         .probe = ili9163_probe,
 216         .remove = ili9163_remove,
 217         .shutdown = ili9163_shutdown,
 218 };
 219 module_spi_driver(ili9163_spi_driver);
 220
 221 MODULE_DESCRIPTION("Ilitek ILI9163 DRM driver");
 222 MODULE_AUTHOR("Daniel Mack <daniel@zonque.org>");
 223 MODULE_LICENSE("GPL");