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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * DRM driver for Multi-Inno MI0283QT panels4 *5 * Copyright 2016 Noralf Trønnes6 */7 8#include <linux/backlight.h>9#include <linux/delay.h>10#include <linux/gpio/consumer.h>11#include <linux/module.h>12#include <linux/property.h>13#include <linux/regulator/consumer.h>14#include <linux/spi/spi.h>15 16#include <drm/drm_atomic_helper.h>17#include <drm/drm_drv.h>18#include <drm/drm_fbdev_dma.h>19#include <drm/drm_gem_atomic_helper.h>20#include <drm/drm_gem_dma_helper.h>21#include <drm/drm_managed.h>22#include <drm/drm_mipi_dbi.h>23#include <drm/drm_modeset_helper.h>24#include <video/mipi_display.h>25 26#define ILI9341_FRMCTR1 0xb127#define ILI9341_DISCTRL 0xb628#define ILI9341_ETMOD 0xb729 30#define ILI9341_PWCTRL1 0xc031#define ILI9341_PWCTRL2 0xc132#define ILI9341_VMCTRL1 0xc533#define ILI9341_VMCTRL2 0xc734#define ILI9341_PWCTRLA 0xcb35#define ILI9341_PWCTRLB 0xcf36 37#define ILI9341_PGAMCTRL 0xe038#define ILI9341_NGAMCTRL 0xe139#define ILI9341_DTCTRLA 0xe840#define ILI9341_DTCTRLB 0xea41#define ILI9341_PWRSEQ 0xed42 43#define ILI9341_EN3GAM 0xf244#define ILI9341_PUMPCTRL 0xf745 46#define ILI9341_MADCTL_BGR BIT(3)47#define ILI9341_MADCTL_MV BIT(5)48#define ILI9341_MADCTL_MX BIT(6)49#define ILI9341_MADCTL_MY BIT(7)50 51static void mi0283qt_enable(struct drm_simple_display_pipe *pipe,52 struct drm_crtc_state *crtc_state,53 struct drm_plane_state *plane_state)54{55 struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);56 struct mipi_dbi *dbi = &dbidev->dbi;57 u8 addr_mode;58 int ret, idx;59 60 if (!drm_dev_enter(pipe->crtc.dev, &idx))61 return;62 63 DRM_DEBUG_KMS("\n");64 65 ret = mipi_dbi_poweron_conditional_reset(dbidev);66 if (ret < 0)67 goto out_exit;68 if (ret == 1)69 goto out_enable;70 71 mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF);72 73 mipi_dbi_command(dbi, ILI9341_PWCTRLB, 0x00, 0x83, 0x30);74 mipi_dbi_command(dbi, ILI9341_PWRSEQ, 0x64, 0x03, 0x12, 0x81);75 mipi_dbi_command(dbi, ILI9341_DTCTRLA, 0x85, 0x01, 0x79);76 mipi_dbi_command(dbi, ILI9341_PWCTRLA, 0x39, 0x2c, 0x00, 0x34, 0x02);77 mipi_dbi_command(dbi, ILI9341_PUMPCTRL, 0x20);78 mipi_dbi_command(dbi, ILI9341_DTCTRLB, 0x00, 0x00);79 80 /* Power Control */81 mipi_dbi_command(dbi, ILI9341_PWCTRL1, 0x26);82 mipi_dbi_command(dbi, ILI9341_PWCTRL2, 0x11);83 /* VCOM */84 mipi_dbi_command(dbi, ILI9341_VMCTRL1, 0x35, 0x3e);85 mipi_dbi_command(dbi, ILI9341_VMCTRL2, 0xbe);86 87 /* Memory Access Control */88 mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT);89 90 /* Frame Rate */91 mipi_dbi_command(dbi, ILI9341_FRMCTR1, 0x00, 0x1b);92 93 /* Gamma */94 mipi_dbi_command(dbi, ILI9341_EN3GAM, 0x08);95 mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, 0x01);96 mipi_dbi_command(dbi, ILI9341_PGAMCTRL,97 0x1f, 0x1a, 0x18, 0x0a, 0x0f, 0x06, 0x45, 0x87,98 0x32, 0x0a, 0x07, 0x02, 0x07, 0x05, 0x00);99 mipi_dbi_command(dbi, ILI9341_NGAMCTRL,100 0x00, 0x25, 0x27, 0x05, 0x10, 0x09, 0x3a, 0x78,101 0x4d, 0x05, 0x18, 0x0d, 0x38, 0x3a, 0x1f);102 103 /* DDRAM */104 mipi_dbi_command(dbi, ILI9341_ETMOD, 0x07);105 106 /* Display */107 mipi_dbi_command(dbi, ILI9341_DISCTRL, 0x0a, 0x82, 0x27, 0x00);108 mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);109 msleep(100);110 111 mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);112 msleep(100);113 114out_enable:115 /* The PiTFT (ili9340) has a hardware reset circuit that116 * resets only on power-on and not on each reboot through117 * a gpio like the rpi-display does.118 * As a result, we need to always apply the rotation value119 * regardless of the display "on/off" state.120 */121 switch (dbidev->rotation) {122 default:123 addr_mode = ILI9341_MADCTL_MV | ILI9341_MADCTL_MY |124 ILI9341_MADCTL_MX;125 break;126 case 90:127 addr_mode = ILI9341_MADCTL_MY;128 break;129 case 180:130 addr_mode = ILI9341_MADCTL_MV;131 break;132 case 270:133 addr_mode = ILI9341_MADCTL_MX;134 break;135 }136 addr_mode |= ILI9341_MADCTL_BGR;137 mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);138 mipi_dbi_enable_flush(dbidev, crtc_state, plane_state);139out_exit:140 drm_dev_exit(idx);141}142 143static const struct drm_simple_display_pipe_funcs mi0283qt_pipe_funcs = {144 DRM_MIPI_DBI_SIMPLE_DISPLAY_PIPE_FUNCS(mi0283qt_enable),145};146 147static const struct drm_display_mode mi0283qt_mode = {148 DRM_SIMPLE_MODE(320, 240, 58, 43),149};150 151DEFINE_DRM_GEM_DMA_FOPS(mi0283qt_fops);152 153static const struct drm_driver mi0283qt_driver = {154 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,155 .fops = &mi0283qt_fops,156 DRM_GEM_DMA_DRIVER_OPS_VMAP,157 .debugfs_init = mipi_dbi_debugfs_init,158 .name = "mi0283qt",159 .desc = "Multi-Inno MI0283QT",160 .date = "20160614",161 .major = 1,162 .minor = 0,163};164 165static const struct of_device_id mi0283qt_of_match[] = {166 { .compatible = "multi-inno,mi0283qt" },167 {},168};169MODULE_DEVICE_TABLE(of, mi0283qt_of_match);170 171static const struct spi_device_id mi0283qt_id[] = {172 { "mi0283qt", 0 },173 { },174};175MODULE_DEVICE_TABLE(spi, mi0283qt_id);176 177static int mi0283qt_probe(struct spi_device *spi)178{179 struct device *dev = &spi->dev;180 struct mipi_dbi_dev *dbidev;181 struct drm_device *drm;182 struct mipi_dbi *dbi;183 struct gpio_desc *dc;184 u32 rotation = 0;185 int ret;186 187 dbidev = devm_drm_dev_alloc(dev, &mi0283qt_driver,188 struct mipi_dbi_dev, drm);189 if (IS_ERR(dbidev))190 return PTR_ERR(dbidev);191 192 dbi = &dbidev->dbi;193 drm = &dbidev->drm;194 195 dbi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);196 if (IS_ERR(dbi->reset))197 return dev_err_probe(dev, PTR_ERR(dbi->reset), "Failed to get GPIO 'reset'\n");198 199 dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW);200 if (IS_ERR(dc))201 return dev_err_probe(dev, PTR_ERR(dc), "Failed to get GPIO 'dc'\n");202 203 dbidev->regulator = devm_regulator_get(dev, "power");204 if (IS_ERR(dbidev->regulator))205 return PTR_ERR(dbidev->regulator);206 207 dbidev->backlight = devm_of_find_backlight(dev);208 if (IS_ERR(dbidev->backlight))209 return PTR_ERR(dbidev->backlight);210 211 device_property_read_u32(dev, "rotation", &rotation);212 213 ret = mipi_dbi_spi_init(spi, dbi, dc);214 if (ret)215 return ret;216 217 ret = mipi_dbi_dev_init(dbidev, &mi0283qt_pipe_funcs, &mi0283qt_mode, rotation);218 if (ret)219 return ret;220 221 drm_mode_config_reset(drm);222 223 ret = drm_dev_register(drm, 0);224 if (ret)225 return ret;226 227 spi_set_drvdata(spi, drm);228 229 drm_fbdev_dma_setup(drm, 0);230 231 return 0;232}233 234static void mi0283qt_remove(struct spi_device *spi)235{236 struct drm_device *drm = spi_get_drvdata(spi);237 238 drm_dev_unplug(drm);239 drm_atomic_helper_shutdown(drm);240}241 242static void mi0283qt_shutdown(struct spi_device *spi)243{244 drm_atomic_helper_shutdown(spi_get_drvdata(spi));245}246 247static int __maybe_unused mi0283qt_pm_suspend(struct device *dev)248{249 return drm_mode_config_helper_suspend(dev_get_drvdata(dev));250}251 252static int __maybe_unused mi0283qt_pm_resume(struct device *dev)253{254 drm_mode_config_helper_resume(dev_get_drvdata(dev));255 256 return 0;257}258 259static const struct dev_pm_ops mi0283qt_pm_ops = {260 SET_SYSTEM_SLEEP_PM_OPS(mi0283qt_pm_suspend, mi0283qt_pm_resume)261};262 263static struct spi_driver mi0283qt_spi_driver = {264 .driver = {265 .name = "mi0283qt",266 .of_match_table = mi0283qt_of_match,267 .pm = &mi0283qt_pm_ops,268 },269 .id_table = mi0283qt_id,270 .probe = mi0283qt_probe,271 .remove = mi0283qt_remove,272 .shutdown = mi0283qt_shutdown,273};274module_spi_driver(mi0283qt_spi_driver);275 276MODULE_DESCRIPTION("Multi-Inno MI0283QT DRM driver");277MODULE_AUTHOR("Noralf Trønnes");278MODULE_LICENSE("GPL");279