| /* |
| * DRM driver for Multi-Inno MI0283QT panels |
| * |
| * Copyright 2016 Noralf Trønnes |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| */ |
| |
| #include <linux/backlight.h> |
| #include <linux/delay.h> |
| #include <linux/gpio/consumer.h> |
| #include <linux/module.h> |
| #include <linux/property.h> |
| #include <linux/regulator/consumer.h> |
| #include <linux/spi/spi.h> |
| |
| #include <drm/drm_fb_helper.h> |
| #include <drm/drm_modeset_helper.h> |
| #include <drm/drm_gem_framebuffer_helper.h> |
| #include <drm/tinydrm/mipi-dbi.h> |
| #include <drm/tinydrm/tinydrm-helpers.h> |
| #include <video/mipi_display.h> |
| |
| #define ILI9341_FRMCTR1 0xb1 |
| #define ILI9341_DISCTRL 0xb6 |
| #define ILI9341_ETMOD 0xb7 |
| |
| #define ILI9341_PWCTRL1 0xc0 |
| #define ILI9341_PWCTRL2 0xc1 |
| #define ILI9341_VMCTRL1 0xc5 |
| #define ILI9341_VMCTRL2 0xc7 |
| #define ILI9341_PWCTRLA 0xcb |
| #define ILI9341_PWCTRLB 0xcf |
| |
| #define ILI9341_PGAMCTRL 0xe0 |
| #define ILI9341_NGAMCTRL 0xe1 |
| #define ILI9341_DTCTRLA 0xe8 |
| #define ILI9341_DTCTRLB 0xea |
| #define ILI9341_PWRSEQ 0xed |
| |
| #define ILI9341_EN3GAM 0xf2 |
| #define ILI9341_PUMPCTRL 0xf7 |
| |
| #define ILI9341_MADCTL_BGR BIT(3) |
| #define ILI9341_MADCTL_MV BIT(5) |
| #define ILI9341_MADCTL_MX BIT(6) |
| #define ILI9341_MADCTL_MY BIT(7) |
| |
| static void mi0283qt_enable(struct drm_simple_display_pipe *pipe, |
| struct drm_crtc_state *crtc_state, |
| struct drm_plane_state *plane_state) |
| { |
| struct tinydrm_device *tdev = pipe_to_tinydrm(pipe); |
| struct mipi_dbi *mipi = mipi_dbi_from_tinydrm(tdev); |
| u8 addr_mode; |
| int ret; |
| |
| DRM_DEBUG_KMS("\n"); |
| |
| ret = mipi_dbi_poweron_conditional_reset(mipi); |
| if (ret < 0) |
| return; |
| if (ret == 1) |
| goto out_enable; |
| |
| mipi_dbi_command(mipi, MIPI_DCS_SET_DISPLAY_OFF); |
| |
| mipi_dbi_command(mipi, ILI9341_PWCTRLB, 0x00, 0x83, 0x30); |
| mipi_dbi_command(mipi, ILI9341_PWRSEQ, 0x64, 0x03, 0x12, 0x81); |
| mipi_dbi_command(mipi, ILI9341_DTCTRLA, 0x85, 0x01, 0x79); |
| mipi_dbi_command(mipi, ILI9341_PWCTRLA, 0x39, 0x2c, 0x00, 0x34, 0x02); |
| mipi_dbi_command(mipi, ILI9341_PUMPCTRL, 0x20); |
| mipi_dbi_command(mipi, ILI9341_DTCTRLB, 0x00, 0x00); |
| |
| /* Power Control */ |
| mipi_dbi_command(mipi, ILI9341_PWCTRL1, 0x26); |
| mipi_dbi_command(mipi, ILI9341_PWCTRL2, 0x11); |
| /* VCOM */ |
| mipi_dbi_command(mipi, ILI9341_VMCTRL1, 0x35, 0x3e); |
| mipi_dbi_command(mipi, ILI9341_VMCTRL2, 0xbe); |
| |
| /* Memory Access Control */ |
| mipi_dbi_command(mipi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT); |
| |
| /* Frame Rate */ |
| mipi_dbi_command(mipi, ILI9341_FRMCTR1, 0x00, 0x1b); |
| |
| /* Gamma */ |
| mipi_dbi_command(mipi, ILI9341_EN3GAM, 0x08); |
| mipi_dbi_command(mipi, MIPI_DCS_SET_GAMMA_CURVE, 0x01); |
| mipi_dbi_command(mipi, ILI9341_PGAMCTRL, |
| 0x1f, 0x1a, 0x18, 0x0a, 0x0f, 0x06, 0x45, 0x87, |
| 0x32, 0x0a, 0x07, 0x02, 0x07, 0x05, 0x00); |
| mipi_dbi_command(mipi, ILI9341_NGAMCTRL, |
| 0x00, 0x25, 0x27, 0x05, 0x10, 0x09, 0x3a, 0x78, |
| 0x4d, 0x05, 0x18, 0x0d, 0x38, 0x3a, 0x1f); |
| |
| /* DDRAM */ |
| mipi_dbi_command(mipi, ILI9341_ETMOD, 0x07); |
| |
| /* Display */ |
| mipi_dbi_command(mipi, ILI9341_DISCTRL, 0x0a, 0x82, 0x27, 0x00); |
| mipi_dbi_command(mipi, MIPI_DCS_EXIT_SLEEP_MODE); |
| msleep(100); |
| |
| mipi_dbi_command(mipi, MIPI_DCS_SET_DISPLAY_ON); |
| msleep(100); |
| |
| out_enable: |
| /* The PiTFT (ili9340) has a hardware reset circuit that |
| * resets only on power-on and not on each reboot through |
| * a gpio like the rpi-display does. |
| * As a result, we need to always apply the rotation value |
| * regardless of the display "on/off" state. |
| */ |
| switch (mipi->rotation) { |
| default: |
| addr_mode = ILI9341_MADCTL_MV | ILI9341_MADCTL_MY | |
| ILI9341_MADCTL_MX; |
| break; |
| case 90: |
| addr_mode = ILI9341_MADCTL_MY; |
| break; |
| case 180: |
| addr_mode = ILI9341_MADCTL_MV; |
| break; |
| case 270: |
| addr_mode = ILI9341_MADCTL_MX; |
| break; |
| } |
| addr_mode |= ILI9341_MADCTL_BGR; |
| mipi_dbi_command(mipi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode); |
| mipi_dbi_enable_flush(mipi, crtc_state, plane_state); |
| } |
| |
| static const struct drm_simple_display_pipe_funcs mi0283qt_pipe_funcs = { |
| .enable = mi0283qt_enable, |
| .disable = mipi_dbi_pipe_disable, |
| .update = tinydrm_display_pipe_update, |
| .prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb, |
| }; |
| |
| static const struct drm_display_mode mi0283qt_mode = { |
| TINYDRM_MODE(320, 240, 58, 43), |
| }; |
| |
| DEFINE_DRM_GEM_CMA_FOPS(mi0283qt_fops); |
| |
| static struct drm_driver mi0283qt_driver = { |
| .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME | |
| DRIVER_ATOMIC, |
| .fops = &mi0283qt_fops, |
| TINYDRM_GEM_DRIVER_OPS, |
| .debugfs_init = mipi_dbi_debugfs_init, |
| .name = "mi0283qt", |
| .desc = "Multi-Inno MI0283QT", |
| .date = "20160614", |
| .major = 1, |
| .minor = 0, |
| }; |
| |
| static const struct of_device_id mi0283qt_of_match[] = { |
| { .compatible = "multi-inno,mi0283qt" }, |
| {}, |
| }; |
| MODULE_DEVICE_TABLE(of, mi0283qt_of_match); |
| |
| static const struct spi_device_id mi0283qt_id[] = { |
| { "mi0283qt", 0 }, |
| { }, |
| }; |
| MODULE_DEVICE_TABLE(spi, mi0283qt_id); |
| |
| static int mi0283qt_probe(struct spi_device *spi) |
| { |
| struct device *dev = &spi->dev; |
| struct mipi_dbi *mipi; |
| struct gpio_desc *dc; |
| u32 rotation = 0; |
| int ret; |
| |
| mipi = devm_kzalloc(dev, sizeof(*mipi), GFP_KERNEL); |
| if (!mipi) |
| return -ENOMEM; |
| |
| mipi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); |
| if (IS_ERR(mipi->reset)) { |
| DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n"); |
| return PTR_ERR(mipi->reset); |
| } |
| |
| dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW); |
| if (IS_ERR(dc)) { |
| DRM_DEV_ERROR(dev, "Failed to get gpio 'dc'\n"); |
| return PTR_ERR(dc); |
| } |
| |
| mipi->regulator = devm_regulator_get(dev, "power"); |
| if (IS_ERR(mipi->regulator)) |
| return PTR_ERR(mipi->regulator); |
| |
| mipi->backlight = devm_of_find_backlight(dev); |
| if (IS_ERR(mipi->backlight)) |
| return PTR_ERR(mipi->backlight); |
| |
| device_property_read_u32(dev, "rotation", &rotation); |
| |
| ret = mipi_dbi_spi_init(spi, mipi, dc); |
| if (ret) |
| return ret; |
| |
| ret = mipi_dbi_init(&spi->dev, mipi, &mi0283qt_pipe_funcs, |
| &mi0283qt_driver, &mi0283qt_mode, rotation); |
| if (ret) |
| return ret; |
| |
| spi_set_drvdata(spi, mipi); |
| |
| return devm_tinydrm_register(&mipi->tinydrm); |
| } |
| |
| static void mi0283qt_shutdown(struct spi_device *spi) |
| { |
| struct mipi_dbi *mipi = spi_get_drvdata(spi); |
| |
| tinydrm_shutdown(&mipi->tinydrm); |
| } |
| |
| static int __maybe_unused mi0283qt_pm_suspend(struct device *dev) |
| { |
| struct mipi_dbi *mipi = dev_get_drvdata(dev); |
| |
| return drm_mode_config_helper_suspend(mipi->tinydrm.drm); |
| } |
| |
| static int __maybe_unused mi0283qt_pm_resume(struct device *dev) |
| { |
| struct mipi_dbi *mipi = dev_get_drvdata(dev); |
| |
| drm_mode_config_helper_resume(mipi->tinydrm.drm); |
| |
| return 0; |
| } |
| |
| static const struct dev_pm_ops mi0283qt_pm_ops = { |
| SET_SYSTEM_SLEEP_PM_OPS(mi0283qt_pm_suspend, mi0283qt_pm_resume) |
| }; |
| |
| static struct spi_driver mi0283qt_spi_driver = { |
| .driver = { |
| .name = "mi0283qt", |
| .owner = THIS_MODULE, |
| .of_match_table = mi0283qt_of_match, |
| .pm = &mi0283qt_pm_ops, |
| }, |
| .id_table = mi0283qt_id, |
| .probe = mi0283qt_probe, |
| .shutdown = mi0283qt_shutdown, |
| }; |
| module_spi_driver(mi0283qt_spi_driver); |
| |
| MODULE_DESCRIPTION("Multi-Inno MI0283QT DRM driver"); |
| MODULE_AUTHOR("Noralf Trønnes"); |
| MODULE_LICENSE("GPL"); |