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_fbdev_generic.h>
  13 #include <drm/drm_gem_atomic_helper.h>
  14 #include <drm/drm_gem_dma_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         DRM_MIPI_DBI_SIMPLE_DISPLAY_PIPE_FUNCS(yx240qv29_enable),
 104 };
 105
 106 static const struct drm_display_mode yx240qv29_mode = {
 107         DRM_SIMPLE_MODE(128, 160, 28, 35),
 108 };
 109
 110 DEFINE_DRM_GEM_DMA_FOPS(ili9163_fops);
 111
 112 static struct drm_driver ili9163_driver = {
 113         .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
 114         .fops                   = &ili9163_fops,
 115         DRM_GEM_DMA_DRIVER_OPS_VMAP,
 116         .debugfs_init           = mipi_dbi_debugfs_init,
 117         .name                   = "ili9163",
 118         .desc                   = "Ilitek ILI9163",
 119         .date                   = "20210208",
 120         .major                  = 1,
 121         .minor                  = 0,
 122 };
 123
 124 static const struct of_device_id ili9163_of_match[] = {
 125         { .compatible = "newhaven,1.8-128160EF" },
 126         { }
 127 };
 128 MODULE_DEVICE_TABLE(of, ili9163_of_match);
 129
 130 static const struct spi_device_id ili9163_id[] = {
 131         { "nhd-1.8-128160EF", 0 },
 132         { }
 133 };
 134 MODULE_DEVICE_TABLE(spi, ili9163_id);
 135
 136 static int ili9163_probe(struct spi_device *spi)
 137 {
 138         struct device *dev = &spi->dev;
 139         struct mipi_dbi_dev *dbidev;
 140         struct drm_device *drm;
 141         struct mipi_dbi *dbi;
 142         struct gpio_desc *dc;
 143         u32 rotation = 0;
 144         int ret;
 145
 146         dbidev = devm_drm_dev_alloc(dev, &ili9163_driver,
 147                                     struct mipi_dbi_dev, drm);
 148         if (IS_ERR(dbidev))
 149                 return PTR_ERR(dbidev);
 150
 151         dbi = &dbidev->dbi;
 152         drm = &dbidev->drm;
 153
 154         spi_set_drvdata(spi, drm);
 155
 156         dbi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
 157         if (IS_ERR(dbi->reset)) {
 158                 DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
 159                 return PTR_ERR(dbi->reset);
 160         }
 161
 162         dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW);
 163         if (IS_ERR(dc)) {
 164                 DRM_DEV_ERROR(dev, "Failed to get gpio 'dc'\n");
 165                 return PTR_ERR(dc);
 166         }
 167
 168         dbidev->backlight = devm_of_find_backlight(dev);
 169         if (IS_ERR(dbidev->backlight))
 170                 return PTR_ERR(dbidev->backlight);
 171
 172         device_property_read_u32(dev, "rotation", &rotation);
 173
 174         ret = mipi_dbi_spi_init(spi, dbi, dc);
 175         if (ret)
 176                 return ret;
 177
 178         ret = mipi_dbi_dev_init(dbidev, &ili9163_pipe_funcs, &yx240qv29_mode, rotation);
 179         if (ret)
 180                 return ret;
 181
 182         drm_mode_config_reset(drm);
 183
 184         ret = drm_dev_register(drm, 0);
 185         if (ret)
 186                 return ret;
 187
 188         drm_fbdev_generic_setup(drm, 0);
 189
 190         return 0;
 191 }
 192
 193 static void ili9163_remove(struct spi_device *spi)
 194 {
 195         struct drm_device *drm = spi_get_drvdata(spi);
 196
 197         drm_dev_unplug(drm);
 198         drm_atomic_helper_shutdown(drm);
 199 }
 200
 201 static void ili9163_shutdown(struct spi_device *spi)
 202 {
 203         drm_atomic_helper_shutdown(spi_get_drvdata(spi));
 204 }
 205
 206 static struct spi_driver ili9163_spi_driver = {
 207         .driver = {
 208                 .name = "ili9163",
 209                 .of_match_table = ili9163_of_match,
 210         },
 211         .id_table = ili9163_id,
 212         .probe = ili9163_probe,
 213         .remove = ili9163_remove,
 214         .shutdown = ili9163_shutdown,
 215 };
 216 module_spi_driver(ili9163_spi_driver);
 217
 218 MODULE_DESCRIPTION("Ilitek ILI9163 DRM driver");
 219 MODULE_AUTHOR("Daniel Mack <[email protected]>");
 220 MODULE_LICENSE("GPL");