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1// SPDX-License-Identifier: GPL-2.0+2/*3 * DRM driver for Ilitek ILI9341 panels4 *5 * Copyright 2018 David Lechner <david@lechnology.com>6 *7 * Based on mi0283qt.c:8 * Copyright 2016 Noralf Trønnes9 */10 11#include <linux/backlight.h>12#include <linux/delay.h>13#include <linux/gpio/consumer.h>14#include <linux/module.h>15#include <linux/property.h>16#include <linux/spi/spi.h>17 18#include <drm/drm_atomic_helper.h>19#include <drm/drm_drv.h>20#include <drm/drm_fbdev_dma.h>21#include <drm/drm_gem_atomic_helper.h>22#include <drm/drm_gem_dma_helper.h>23#include <drm/drm_managed.h>24#include <drm/drm_mipi_dbi.h>25#include <drm/drm_modeset_helper.h>26#include <video/mipi_display.h>27 28#define ILI9341_FRMCTR1 0xb129#define ILI9341_DISCTRL 0xb630#define ILI9341_ETMOD 0xb731 32#define ILI9341_PWCTRL1 0xc033#define ILI9341_PWCTRL2 0xc134#define ILI9341_VMCTRL1 0xc535#define ILI9341_VMCTRL2 0xc736#define ILI9341_PWCTRLA 0xcb37#define ILI9341_PWCTRLB 0xcf38 39#define ILI9341_PGAMCTRL 0xe040#define ILI9341_NGAMCTRL 0xe141#define ILI9341_DTCTRLA 0xe842#define ILI9341_DTCTRLB 0xea43#define ILI9341_PWRSEQ 0xed44 45#define ILI9341_EN3GAM 0xf246#define ILI9341_PUMPCTRL 0xf747 48#define ILI9341_MADCTL_BGR BIT(3)49#define ILI9341_MADCTL_MV BIT(5)50#define ILI9341_MADCTL_MX BIT(6)51#define ILI9341_MADCTL_MY BIT(7)52 53static void yx240qv29_enable(struct drm_simple_display_pipe *pipe,54 struct drm_crtc_state *crtc_state,55 struct drm_plane_state *plane_state)56{57 struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);58 struct mipi_dbi *dbi = &dbidev->dbi;59 u8 addr_mode;60 int ret, idx;61 62 if (!drm_dev_enter(pipe->crtc.dev, &idx))63 return;64 65 DRM_DEBUG_KMS("\n");66 67 ret = mipi_dbi_poweron_conditional_reset(dbidev);68 if (ret < 0)69 goto out_exit;70 if (ret == 1)71 goto out_enable;72 73 mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF);74 75 mipi_dbi_command(dbi, ILI9341_PWCTRLB, 0x00, 0xc1, 0x30);76 mipi_dbi_command(dbi, ILI9341_PWRSEQ, 0x64, 0x03, 0x12, 0x81);77 mipi_dbi_command(dbi, ILI9341_DTCTRLA, 0x85, 0x00, 0x78);78 mipi_dbi_command(dbi, ILI9341_PWCTRLA, 0x39, 0x2c, 0x00, 0x34, 0x02);79 mipi_dbi_command(dbi, ILI9341_PUMPCTRL, 0x20);80 mipi_dbi_command(dbi, ILI9341_DTCTRLB, 0x00, 0x00);81 82 /* Power Control */83 mipi_dbi_command(dbi, ILI9341_PWCTRL1, 0x23);84 mipi_dbi_command(dbi, ILI9341_PWCTRL2, 0x10);85 /* VCOM */86 mipi_dbi_command(dbi, ILI9341_VMCTRL1, 0x3e, 0x28);87 mipi_dbi_command(dbi, ILI9341_VMCTRL2, 0x86);88 89 /* Memory Access Control */90 mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT);91 92 /* Frame Rate */93 mipi_dbi_command(dbi, ILI9341_FRMCTR1, 0x00, 0x1b);94 95 /* Gamma */96 mipi_dbi_command(dbi, ILI9341_EN3GAM, 0x00);97 mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, 0x01);98 mipi_dbi_command(dbi, ILI9341_PGAMCTRL,99 0x0f, 0x31, 0x2b, 0x0c, 0x0e, 0x08, 0x4e, 0xf1,100 0x37, 0x07, 0x10, 0x03, 0x0e, 0x09, 0x00);101 mipi_dbi_command(dbi, ILI9341_NGAMCTRL,102 0x00, 0x0e, 0x14, 0x03, 0x11, 0x07, 0x31, 0xc1,103 0x48, 0x08, 0x0f, 0x0c, 0x31, 0x36, 0x0f);104 105 /* DDRAM */106 mipi_dbi_command(dbi, ILI9341_ETMOD, 0x07);107 108 /* Display */109 mipi_dbi_command(dbi, ILI9341_DISCTRL, 0x08, 0x82, 0x27, 0x00);110 mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);111 msleep(100);112 113 mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);114 msleep(100);115 116out_enable:117 switch (dbidev->rotation) {118 default:119 addr_mode = ILI9341_MADCTL_MX;120 break;121 case 90:122 addr_mode = ILI9341_MADCTL_MV;123 break;124 case 180:125 addr_mode = ILI9341_MADCTL_MY;126 break;127 case 270:128 addr_mode = ILI9341_MADCTL_MV | ILI9341_MADCTL_MY |129 ILI9341_MADCTL_MX;130 break;131 }132 addr_mode |= ILI9341_MADCTL_BGR;133 mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);134 mipi_dbi_enable_flush(dbidev, crtc_state, plane_state);135out_exit:136 drm_dev_exit(idx);137}138 139static const struct drm_simple_display_pipe_funcs ili9341_pipe_funcs = {140 DRM_MIPI_DBI_SIMPLE_DISPLAY_PIPE_FUNCS(yx240qv29_enable),141};142 143static const struct drm_display_mode yx240qv29_mode = {144 DRM_SIMPLE_MODE(240, 320, 37, 49),145};146 147DEFINE_DRM_GEM_DMA_FOPS(ili9341_fops);148 149static const struct drm_driver ili9341_driver = {150 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,151 .fops = &ili9341_fops,152 DRM_GEM_DMA_DRIVER_OPS_VMAP,153 .debugfs_init = mipi_dbi_debugfs_init,154 .name = "ili9341",155 .desc = "Ilitek ILI9341",156 .date = "20180514",157 .major = 1,158 .minor = 0,159};160 161static const struct of_device_id ili9341_of_match[] = {162 { .compatible = "adafruit,yx240qv29" },163 { }164};165MODULE_DEVICE_TABLE(of, ili9341_of_match);166 167static const struct spi_device_id ili9341_id[] = {168 { "yx240qv29", 0 },169 { }170};171MODULE_DEVICE_TABLE(spi, ili9341_id);172 173static int ili9341_probe(struct spi_device *spi)174{175 struct device *dev = &spi->dev;176 struct mipi_dbi_dev *dbidev;177 struct drm_device *drm;178 struct mipi_dbi *dbi;179 struct gpio_desc *dc;180 u32 rotation = 0;181 int ret;182 183 dbidev = devm_drm_dev_alloc(dev, &ili9341_driver,184 struct mipi_dbi_dev, drm);185 if (IS_ERR(dbidev))186 return PTR_ERR(dbidev);187 188 dbi = &dbidev->dbi;189 drm = &dbidev->drm;190 191 dbi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);192 if (IS_ERR(dbi->reset))193 return dev_err_probe(dev, PTR_ERR(dbi->reset), "Failed to get GPIO 'reset'\n");194 195 dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW);196 if (IS_ERR(dc))197 return dev_err_probe(dev, PTR_ERR(dc), "Failed to get GPIO 'dc'\n");198 199 dbidev->backlight = devm_of_find_backlight(dev);200 if (IS_ERR(dbidev->backlight))201 return PTR_ERR(dbidev->backlight);202 203 device_property_read_u32(dev, "rotation", &rotation);204 205 ret = mipi_dbi_spi_init(spi, dbi, dc);206 if (ret)207 return ret;208 209 ret = mipi_dbi_dev_init(dbidev, &ili9341_pipe_funcs, &yx240qv29_mode, rotation);210 if (ret)211 return ret;212 213 drm_mode_config_reset(drm);214 215 ret = drm_dev_register(drm, 0);216 if (ret)217 return ret;218 219 spi_set_drvdata(spi, drm);220 221 drm_fbdev_dma_setup(drm, 0);222 223 return 0;224}225 226static void ili9341_remove(struct spi_device *spi)227{228 struct drm_device *drm = spi_get_drvdata(spi);229 230 drm_dev_unplug(drm);231 drm_atomic_helper_shutdown(drm);232}233 234static void ili9341_shutdown(struct spi_device *spi)235{236 drm_atomic_helper_shutdown(spi_get_drvdata(spi));237}238 239static struct spi_driver ili9341_spi_driver = {240 .driver = {241 .name = "ili9341",242 .of_match_table = ili9341_of_match,243 },244 .id_table = ili9341_id,245 .probe = ili9341_probe,246 .remove = ili9341_remove,247 .shutdown = ili9341_shutdown,248};249module_spi_driver(ili9341_spi_driver);250 251MODULE_DESCRIPTION("Ilitek ILI9341 DRM driver");252MODULE_AUTHOR("David Lechner <david@lechnology.com>");253MODULE_LICENSE("GPL");254