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