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_client_setup.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 .date = "20210208", 122 .major = 1, 123 .minor = 0, 124 }; 125 126 static const struct of_device_id ili9163_of_match[] = { 127 { .compatible = "newhaven,1.8-128160EF" }, 128 { } 129 }; 130 MODULE_DEVICE_TABLE(of, ili9163_of_match); 131 132 static const struct spi_device_id ili9163_id[] = { 133 { "nhd-1.8-128160EF", 0 }, 134 { } 135 }; 136 MODULE_DEVICE_TABLE(spi, ili9163_id); 137 138 static int ili9163_probe(struct spi_device *spi) 139 { 140 struct device *dev = &spi->dev; 141 struct mipi_dbi_dev *dbidev; 142 struct drm_device *drm; 143 struct mipi_dbi *dbi; 144 struct gpio_desc *dc; 145 u32 rotation = 0; 146 int ret; 147 148 dbidev = devm_drm_dev_alloc(dev, &ili9163_driver, 149 struct mipi_dbi_dev, drm); 150 if (IS_ERR(dbidev)) 151 return PTR_ERR(dbidev); 152 153 dbi = &dbidev->dbi; 154 drm = &dbidev->drm; 155 156 spi_set_drvdata(spi, drm); 157 158 dbi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); 159 if (IS_ERR(dbi->reset)) { 160 DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n"); 161 return PTR_ERR(dbi->reset); 162 } 163 164 dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW); 165 if (IS_ERR(dc)) { 166 DRM_DEV_ERROR(dev, "Failed to get gpio 'dc'\n"); 167 return PTR_ERR(dc); 168 } 169 170 dbidev->backlight = devm_of_find_backlight(dev); 171 if (IS_ERR(dbidev->backlight)) 172 return PTR_ERR(dbidev->backlight); 173 174 device_property_read_u32(dev, "rotation", &rotation); 175 176 ret = mipi_dbi_spi_init(spi, dbi, dc); 177 if (ret) 178 return ret; 179 180 ret = mipi_dbi_dev_init(dbidev, &ili9163_pipe_funcs, &yx240qv29_mode, rotation); 181 if (ret) 182 return ret; 183 184 drm_mode_config_reset(drm); 185 186 ret = drm_dev_register(drm, 0); 187 if (ret) 188 return ret; 189 190 drm_client_setup(drm, NULL); 191 192 return 0; 193 } 194 195 static void ili9163_remove(struct spi_device *spi) 196 { 197 struct drm_device *drm = spi_get_drvdata(spi); 198 199 drm_dev_unplug(drm); 200 drm_atomic_helper_shutdown(drm); 201 } 202 203 static void ili9163_shutdown(struct spi_device *spi) 204 { 205 drm_atomic_helper_shutdown(spi_get_drvdata(spi)); 206 } 207 208 static struct spi_driver ili9163_spi_driver = { 209 .driver = { 210 .name = "ili9163", 211 .of_match_table = ili9163_of_match, 212 }, 213 .id_table = ili9163_id, 214 .probe = ili9163_probe, 215 .remove = ili9163_remove, 216 .shutdown = ili9163_shutdown, 217 }; 218 module_spi_driver(ili9163_spi_driver); 219 220 MODULE_DESCRIPTION("Ilitek ILI9163 DRM driver"); 221 MODULE_AUTHOR("Daniel Mack <daniel@zonque.org>"); 222 MODULE_LICENSE("GPL"); 223