drm/tiny/ili9163.c

0001 // SPDX-License-Identifier: GPL-2.0+
0002
0003 #include <linux/backlight.h>
0004 #include <linux/delay.h>
0005 #include <linux/gpio/consumer.h>
0006 #include <linux/module.h>
0007 #include <linux/property.h>
0008 #include <linux/spi/spi.h>
0009
0010 #include <drm/drm_atomic_helper.h>
0011 #include <drm/drm_drv.h>
0012 #include <drm/drm_fb_helper.h>
0013 #include <drm/drm_gem_atomic_helper.h>
0014 #include <drm/drm_gem_cma_helper.h>
0015 #include <drm/drm_mipi_dbi.h>
0016 #include <drm/drm_modeset_helper.h>
0017
0018 #include <video/mipi_display.h>
0019
0020 #define ILI9163_FRMCTR1     0xb1
0021
0022 #define ILI9163_PWCTRL1     0xc0
0023 #define ILI9163_PWCTRL2     0xc1
0024 #define ILI9163_VMCTRL1     0xc5
0025 #define ILI9163_VMCTRL2     0xc7
0026 #define ILI9163_PWCTRLA     0xcb
0027 #define ILI9163_PWCTRLB     0xcf
0028
0029 #define ILI9163_EN3GAM      0xf2
0030
0031 #define ILI9163_MADCTL_BGR  BIT(3)
0032 #define ILI9163_MADCTL_MV   BIT(5)
0033 #define ILI9163_MADCTL_MX   BIT(6)
0034 #define ILI9163_MADCTL_MY   BIT(7)
0035
0036 static void yx240qv29_enable(struct drm_simple_display_pipe *pipe,
0037                  struct drm_crtc_state *crtc_state,
0038                  struct drm_plane_state *plane_state)
0039 {
0040     struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
0041     struct mipi_dbi *dbi = &dbidev->dbi;
0042     u8 addr_mode;
0043     int ret, idx;
0044
0045     if (!drm_dev_enter(pipe->crtc.dev, &idx))
0046         return;
0047
0048     DRM_DEBUG_KMS("\n");
0049
0050     ret = mipi_dbi_poweron_conditional_reset(dbidev);
0051     if (ret < 0)
0052         goto out_exit;
0053     if (ret == 1)
0054         goto out_enable;
0055
0056     /* Gamma */
0057     mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, 0x04);
0058     mipi_dbi_command(dbi, ILI9163_EN3GAM, 0x00);
0059
0060     /* Frame Rate */
0061     mipi_dbi_command(dbi, ILI9163_FRMCTR1, 0x0a, 0x14);
0062
0063     /* Power Control */
0064     mipi_dbi_command(dbi, ILI9163_PWCTRL1, 0x0a, 0x00);
0065     mipi_dbi_command(dbi, ILI9163_PWCTRL2, 0x02);
0066
0067     /* VCOM */
0068     mipi_dbi_command(dbi, ILI9163_VMCTRL1, 0x2f, 0x3e);
0069     mipi_dbi_command(dbi, ILI9163_VMCTRL2, 0x40);
0070
0071     /* Memory Access Control */
0072     mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT);
0073
0074     mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
0075     msleep(100);
0076
0077     mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
0078     msleep(100);
0079
0080 out_enable:
0081     switch (dbidev->rotation) {
0082     default:
0083         addr_mode = ILI9163_MADCTL_MX | ILI9163_MADCTL_MY;
0084         break;
0085     case 90:
0086         addr_mode = ILI9163_MADCTL_MX | ILI9163_MADCTL_MV;
0087         break;
0088     case 180:
0089         addr_mode = 0;
0090         break;
0091     case 270:
0092         addr_mode = ILI9163_MADCTL_MY | ILI9163_MADCTL_MV;
0093         break;
0094     }
0095     addr_mode |= ILI9163_MADCTL_BGR;
0096     mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
0097     mipi_dbi_enable_flush(dbidev, crtc_state, plane_state);
0098 out_exit:
0099     drm_dev_exit(idx);
0100 }
0101
0102 static const struct drm_simple_display_pipe_funcs ili9163_pipe_funcs = {
0103     .enable = yx240qv29_enable,
0104     .disable = mipi_dbi_pipe_disable,
0105     .update = mipi_dbi_pipe_update,
0106     .prepare_fb = drm_gem_simple_display_pipe_prepare_fb,
0107 };
0108
0109 static const struct drm_display_mode yx240qv29_mode = {
0110     DRM_SIMPLE_MODE(128, 160, 28, 35),
0111 };
0112
0113 DEFINE_DRM_GEM_CMA_FOPS(ili9163_fops);
0114
0115 static struct drm_driver ili9163_driver = {
0116     .driver_features    = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
0117     .fops           = &ili9163_fops,
0118     DRM_GEM_CMA_DRIVER_OPS_VMAP,
0119     .debugfs_init       = mipi_dbi_debugfs_init,
0120     .name           = "ili9163",
0121     .desc           = "Ilitek ILI9163",
0122     .date           = "20210208",
0123     .major          = 1,
0124     .minor          = 0,
0125 };
0126
0127 static const struct of_device_id ili9163_of_match[] = {
0128     { .compatible = "newhaven,1.8-128160EF" },
0129     { }
0130 };
0131 MODULE_DEVICE_TABLE(of, ili9163_of_match);
0132
0133 static const struct spi_device_id ili9163_id[] = {
0134     { "nhd-1.8-128160EF", 0 },
0135     { }
0136 };
0137 MODULE_DEVICE_TABLE(spi, ili9163_id);
0138
0139 static int ili9163_probe(struct spi_device *spi)
0140 {
0141     struct device *dev = &spi->dev;
0142     struct mipi_dbi_dev *dbidev;
0143     struct drm_device *drm;
0144     struct mipi_dbi *dbi;
0145     struct gpio_desc *dc;
0146     u32 rotation = 0;
0147     int ret;
0148
0149     dbidev = devm_drm_dev_alloc(dev, &ili9163_driver,
0150                     struct mipi_dbi_dev, drm);
0151     if (IS_ERR(dbidev))
0152         return PTR_ERR(dbidev);
0153
0154     dbi = &dbidev->dbi;
0155     drm = &dbidev->drm;
0156
0157     spi_set_drvdata(spi, drm);
0158
0159     dbi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
0160     if (IS_ERR(dbi->reset)) {
0161         DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
0162         return PTR_ERR(dbi->reset);
0163     }
0164
0165     dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW);
0166     if (IS_ERR(dc)) {
0167         DRM_DEV_ERROR(dev, "Failed to get gpio 'dc'\n");
0168         return PTR_ERR(dc);
0169     }
0170
0171     dbidev->backlight = devm_of_find_backlight(dev);
0172     if (IS_ERR(dbidev->backlight))
0173         return PTR_ERR(dbidev->backlight);
0174
0175     device_property_read_u32(dev, "rotation", &rotation);
0176
0177     ret = mipi_dbi_spi_init(spi, dbi, dc);
0178     if (ret)
0179         return ret;
0180
0181     ret = mipi_dbi_dev_init(dbidev, &ili9163_pipe_funcs, &yx240qv29_mode, rotation);
0182     if (ret)
0183         return ret;
0184
0185     drm_mode_config_reset(drm);
0186
0187     ret = drm_dev_register(drm, 0);
0188     if (ret)
0189         return ret;
0190
0191     drm_fbdev_generic_setup(drm, 0);
0192
0193     return 0;
0194 }
0195
0196 static void ili9163_remove(struct spi_device *spi)
0197 {
0198     struct drm_device *drm = spi_get_drvdata(spi);
0199
0200     drm_dev_unplug(drm);
0201     drm_atomic_helper_shutdown(drm);
0202 }
0203
0204 static void ili9163_shutdown(struct spi_device *spi)
0205 {
0206     drm_atomic_helper_shutdown(spi_get_drvdata(spi));
0207 }
0208
0209 static struct spi_driver ili9163_spi_driver = {
0210     .driver = {
0211         .name = "ili9163",
0212         .of_match_table = ili9163_of_match,
0213     },
0214     .id_table = ili9163_id,
0215     .probe = ili9163_probe,
0216     .remove = ili9163_remove,
0217     .shutdown = ili9163_shutdown,
0218 };
0219 module_spi_driver(ili9163_spi_driver);
0220
0221 MODULE_DESCRIPTION("Ilitek ILI9163 DRM driver");
0222 MODULE_AUTHOR("Daniel Mack <daniel@zonque.org>");
0223 MODULE_LICENSE("GPL");