drivers/gpu/drm/tiny/ili9341.c - linux/torvalds/linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * DRM driver for Ilitek ILI9341 panels
  *
  * Copyright 2018 David Lechner <david@lechnology.com>
  *
  * Based on mi0283qt.c:
  * Copyright 2016 Noralf Trønnes
  */

 #include <linux/backlight.h>
 #include <linux/delay.h>
 #include <linux/gpio/consumer.h>
 #include <linux/module.h>
 #include <linux/property.h>
 #include <linux/spi/spi.h>

 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_drv.h>
 #include <drm/drm_fb_helper.h>
 #include <drm/drm_gem_cma_helper.h>
 #include <drm/drm_gem_framebuffer_helper.h>
 #include <drm/drm_mipi_dbi.h>
 #include <drm/drm_modeset_helper.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 yx240qv29_enable(struct drm_simple_display_pipe *pipe,
 			     struct drm_crtc_state *crtc_state,
 			     struct drm_plane_state *plane_state)
 {
 	struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
 	struct mipi_dbi *dbi = &dbidev->dbi;
 	u8 addr_mode;
 	int ret, idx;

 	if (!drm_dev_enter(pipe->crtc.dev, &idx))
 		return;

 	DRM_DEBUG_KMS("\n");

 	ret = mipi_dbi_poweron_conditional_reset(dbidev);
 	if (ret < 0)
 		goto out_exit;
 	if (ret == 1)
 		goto out_enable;

 	mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF);

 	mipi_dbi_command(dbi, ILI9341_PWCTRLB, 0x00, 0xc1, 0x30);
 	mipi_dbi_command(dbi, ILI9341_PWRSEQ, 0x64, 0x03, 0x12, 0x81);
 	mipi_dbi_command(dbi, ILI9341_DTCTRLA, 0x85, 0x00, 0x78);
 	mipi_dbi_command(dbi, ILI9341_PWCTRLA, 0x39, 0x2c, 0x00, 0x34, 0x02);
 	mipi_dbi_command(dbi, ILI9341_PUMPCTRL, 0x20);
 	mipi_dbi_command(dbi, ILI9341_DTCTRLB, 0x00, 0x00);

 	/* Power Control */
 	mipi_dbi_command(dbi, ILI9341_PWCTRL1, 0x23);
 	mipi_dbi_command(dbi, ILI9341_PWCTRL2, 0x10);
 	/* VCOM */
 	mipi_dbi_command(dbi, ILI9341_VMCTRL1, 0x3e, 0x28);
 	mipi_dbi_command(dbi, ILI9341_VMCTRL2, 0x86);

 	/* Memory Access Control */
 	mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT);

 	/* Frame Rate */
 	mipi_dbi_command(dbi, ILI9341_FRMCTR1, 0x00, 0x1b);

 	/* Gamma */
 	mipi_dbi_command(dbi, ILI9341_EN3GAM, 0x00);
 	mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, 0x01);
 	mipi_dbi_command(dbi, ILI9341_PGAMCTRL,
 			 0x0f, 0x31, 0x2b, 0x0c, 0x0e, 0x08, 0x4e, 0xf1,
 			 0x37, 0x07, 0x10, 0x03, 0x0e, 0x09, 0x00);
 	mipi_dbi_command(dbi, ILI9341_NGAMCTRL,
 			 0x00, 0x0e, 0x14, 0x03, 0x11, 0x07, 0x31, 0xc1,
 			 0x48, 0x08, 0x0f, 0x0c, 0x31, 0x36, 0x0f);

 	/* DDRAM */
 	mipi_dbi_command(dbi, ILI9341_ETMOD, 0x07);

 	/* Display */
 	mipi_dbi_command(dbi, ILI9341_DISCTRL, 0x08, 0x82, 0x27, 0x00);
 	mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
 	msleep(100);

 	mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
 	msleep(100);

 out_enable:
 	switch (dbidev->rotation) {
 	default:
 		addr_mode = ILI9341_MADCTL_MX;
 		break;
 	case 90:
 		addr_mode = ILI9341_MADCTL_MV;
 		break;
 	case 180:
 		addr_mode = ILI9341_MADCTL_MY;
 		break;
 	case 270:
 		addr_mode = ILI9341_MADCTL_MV | ILI9341_MADCTL_MY |
 			    ILI9341_MADCTL_MX;
 		break;
 	}
 	addr_mode |= ILI9341_MADCTL_BGR;
 	mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
 	mipi_dbi_enable_flush(dbidev, crtc_state, plane_state);
 out_exit:
 	drm_dev_exit(idx);
 }

 static const struct drm_simple_display_pipe_funcs ili9341_pipe_funcs = {
 	.enable = yx240qv29_enable,
 	.disable = mipi_dbi_pipe_disable,
 	.update = mipi_dbi_pipe_update,
 	.prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
 };

 static const struct drm_display_mode yx240qv29_mode = {
 	DRM_SIMPLE_MODE(240, 320, 37, 49),
 };

 DEFINE_DRM_GEM_CMA_FOPS(ili9341_fops);

 static struct drm_driver ili9341_driver = {
 	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
 	.fops			= &ili9341_fops,
 	.release		= mipi_dbi_release,
 	DRM_GEM_CMA_VMAP_DRIVER_OPS,
 	.debugfs_init		= mipi_dbi_debugfs_init,
 	.name			= "ili9341",
 	.desc			= "Ilitek ILI9341",
 	.date			= "20180514",
 	.major			= 1,
 	.minor			= 0,
 };

 static const struct of_device_id ili9341_of_match[] = {
 	{ .compatible = "adafruit,yx240qv29" },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, ili9341_of_match);

 static const struct spi_device_id ili9341_id[] = {
 	{ "yx240qv29", 0 },
 	{ }
 };
 MODULE_DEVICE_TABLE(spi, ili9341_id);

 static int ili9341_probe(struct spi_device *spi)
 {
 	struct device *dev = &spi->dev;
 	struct mipi_dbi_dev *dbidev;
 	struct drm_device *drm;
 	struct mipi_dbi *dbi;
 	struct gpio_desc *dc;
 	u32 rotation = 0;
 	int ret;

 	dbidev = kzalloc(sizeof(*dbidev), GFP_KERNEL);
 	if (!dbidev)
 		return -ENOMEM;

 	dbi = &dbidev->dbi;
 	drm = &dbidev->drm;
 	ret = devm_drm_dev_init(dev, drm, &ili9341_driver);
 	if (ret) {
 		kfree(dbidev);
 		return ret;
 	}

 	drm_mode_config_init(drm);

 	dbi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
 	if (IS_ERR(dbi->reset)) {
 		DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
 		return PTR_ERR(dbi->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);
 	}

 	dbidev->backlight = devm_of_find_backlight(dev);
 	if (IS_ERR(dbidev->backlight))
 		return PTR_ERR(dbidev->backlight);

 	device_property_read_u32(dev, "rotation", &rotation);

 	ret = mipi_dbi_spi_init(spi, dbi, dc);
 	if (ret)
 		return ret;

 	ret = mipi_dbi_dev_init(dbidev, &ili9341_pipe_funcs, &yx240qv29_mode, rotation);
 	if (ret)
 		return ret;

 	drm_mode_config_reset(drm);

 	ret = drm_dev_register(drm, 0);
 	if (ret)
 		return ret;

 	spi_set_drvdata(spi, drm);

 	drm_fbdev_generic_setup(drm, 0);

 	return 0;
 }

 static int ili9341_remove(struct spi_device *spi)
 {
 	struct drm_device *drm = spi_get_drvdata(spi);

 	drm_dev_unplug(drm);
 	drm_atomic_helper_shutdown(drm);

 	return 0;
 }

 static void ili9341_shutdown(struct spi_device *spi)
 {
 	drm_atomic_helper_shutdown(spi_get_drvdata(spi));
 }

 static struct spi_driver ili9341_spi_driver = {
 	.driver = {
 		.name = "ili9341",
 		.of_match_table = ili9341_of_match,
 	},
 	.id_table = ili9341_id,
 	.probe = ili9341_probe,
 	.remove = ili9341_remove,
 	.shutdown = ili9341_shutdown,
 };
 module_spi_driver(ili9341_spi_driver);

 MODULE_DESCRIPTION("Ilitek ILI9341 DRM driver");
 MODULE_AUTHOR("David Lechner <david@lechnology.com>");
 MODULE_LICENSE("GPL");
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* DRM driver for Ilitek ILI9341 panels
	*
	* Copyright 2018 David Lechner <david@lechnology.com>
	*
	* Based on mi0283qt.c:
	* Copyright 2016 Noralf Trønnes
	*/

	#include <linux/backlight.h>
	#include <linux/delay.h>
	#include <linux/gpio/consumer.h>
	#include <linux/module.h>
	#include <linux/property.h>
	#include <linux/spi/spi.h>

	#include <drm/drm_atomic_helper.h>
	#include <drm/drm_drv.h>
	#include <drm/drm_fb_helper.h>
	#include <drm/drm_gem_cma_helper.h>
	#include <drm/drm_gem_framebuffer_helper.h>
	#include <drm/drm_mipi_dbi.h>
	#include <drm/drm_modeset_helper.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 yx240qv29_enable(struct drm_simple_display_pipe *pipe,
	struct drm_crtc_state *crtc_state,
	struct drm_plane_state *plane_state)
	{
	struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
	struct mipi_dbi *dbi = &dbidev->dbi;
	u8 addr_mode;
	int ret, idx;

	if (!drm_dev_enter(pipe->crtc.dev, &idx))
	return;

	DRM_DEBUG_KMS("\n");

	ret = mipi_dbi_poweron_conditional_reset(dbidev);
	if (ret < 0)
	goto out_exit;
	if (ret == 1)
	goto out_enable;

	mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF);

	mipi_dbi_command(dbi, ILI9341_PWCTRLB, 0x00, 0xc1, 0x30);
	mipi_dbi_command(dbi, ILI9341_PWRSEQ, 0x64, 0x03, 0x12, 0x81);
	mipi_dbi_command(dbi, ILI9341_DTCTRLA, 0x85, 0x00, 0x78);
	mipi_dbi_command(dbi, ILI9341_PWCTRLA, 0x39, 0x2c, 0x00, 0x34, 0x02);
	mipi_dbi_command(dbi, ILI9341_PUMPCTRL, 0x20);
	mipi_dbi_command(dbi, ILI9341_DTCTRLB, 0x00, 0x00);

	/* Power Control */
	mipi_dbi_command(dbi, ILI9341_PWCTRL1, 0x23);
	mipi_dbi_command(dbi, ILI9341_PWCTRL2, 0x10);
	/* VCOM */
	mipi_dbi_command(dbi, ILI9341_VMCTRL1, 0x3e, 0x28);
	mipi_dbi_command(dbi, ILI9341_VMCTRL2, 0x86);

	/* Memory Access Control */
	mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT);

	/* Frame Rate */
	mipi_dbi_command(dbi, ILI9341_FRMCTR1, 0x00, 0x1b);

	/* Gamma */
	mipi_dbi_command(dbi, ILI9341_EN3GAM, 0x00);
	mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, 0x01);
	mipi_dbi_command(dbi, ILI9341_PGAMCTRL,
	0x0f, 0x31, 0x2b, 0x0c, 0x0e, 0x08, 0x4e, 0xf1,
	0x37, 0x07, 0x10, 0x03, 0x0e, 0x09, 0x00);
	mipi_dbi_command(dbi, ILI9341_NGAMCTRL,
	0x00, 0x0e, 0x14, 0x03, 0x11, 0x07, 0x31, 0xc1,
	0x48, 0x08, 0x0f, 0x0c, 0x31, 0x36, 0x0f);

	/* DDRAM */
	mipi_dbi_command(dbi, ILI9341_ETMOD, 0x07);

	/* Display */
	mipi_dbi_command(dbi, ILI9341_DISCTRL, 0x08, 0x82, 0x27, 0x00);
	mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
	msleep(100);

	mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
	msleep(100);

	out_enable:
	switch (dbidev->rotation) {
	default:
	addr_mode = ILI9341_MADCTL_MX;
	break;
	case 90:
	addr_mode = ILI9341_MADCTL_MV;
	break;
	case 180:
	addr_mode = ILI9341_MADCTL_MY;
	break;
	case 270:
	addr_mode = ILI9341_MADCTL_MV \| ILI9341_MADCTL_MY \|
	ILI9341_MADCTL_MX;
	break;
	}
	addr_mode \|= ILI9341_MADCTL_BGR;
	mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
	mipi_dbi_enable_flush(dbidev, crtc_state, plane_state);
	out_exit:
	drm_dev_exit(idx);
	}

	static const struct drm_simple_display_pipe_funcs ili9341_pipe_funcs = {
	.enable = yx240qv29_enable,
	.disable = mipi_dbi_pipe_disable,
	.update = mipi_dbi_pipe_update,
	.prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
	};

	static const struct drm_display_mode yx240qv29_mode = {
	DRM_SIMPLE_MODE(240, 320, 37, 49),
	};

	DEFINE_DRM_GEM_CMA_FOPS(ili9341_fops);

	static struct drm_driver ili9341_driver = {
	.driver_features = DRIVER_GEM \| DRIVER_MODESET \| DRIVER_ATOMIC,
	.fops = &ili9341_fops,
	.release = mipi_dbi_release,
	DRM_GEM_CMA_VMAP_DRIVER_OPS,
	.debugfs_init = mipi_dbi_debugfs_init,
	.name = "ili9341",
	.desc = "Ilitek ILI9341",
	.date = "20180514",
	.major = 1,
	.minor = 0,
	};

	static const struct of_device_id ili9341_of_match[] = {
	{ .compatible = "adafruit,yx240qv29" },
	{ }
	};
	MODULE_DEVICE_TABLE(of, ili9341_of_match);

	static const struct spi_device_id ili9341_id[] = {
	{ "yx240qv29", 0 },
	{ }
	};
	MODULE_DEVICE_TABLE(spi, ili9341_id);

	static int ili9341_probe(struct spi_device *spi)
	{
	struct device *dev = &spi->dev;
	struct mipi_dbi_dev *dbidev;
	struct drm_device *drm;
	struct mipi_dbi *dbi;
	struct gpio_desc *dc;
	u32 rotation = 0;
	int ret;

	dbidev = kzalloc(sizeof(*dbidev), GFP_KERNEL);
	if (!dbidev)
	return -ENOMEM;

	dbi = &dbidev->dbi;
	drm = &dbidev->drm;
	ret = devm_drm_dev_init(dev, drm, &ili9341_driver);
	if (ret) {
	kfree(dbidev);
	return ret;
	}

	drm_mode_config_init(drm);

	dbi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
	if (IS_ERR(dbi->reset)) {
	DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
	return PTR_ERR(dbi->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);
	}

	dbidev->backlight = devm_of_find_backlight(dev);
	if (IS_ERR(dbidev->backlight))
	return PTR_ERR(dbidev->backlight);

	device_property_read_u32(dev, "rotation", &rotation);

	ret = mipi_dbi_spi_init(spi, dbi, dc);
	if (ret)
	return ret;

	ret = mipi_dbi_dev_init(dbidev, &ili9341_pipe_funcs, &yx240qv29_mode, rotation);
	if (ret)
	return ret;

	drm_mode_config_reset(drm);

	ret = drm_dev_register(drm, 0);
	if (ret)
	return ret;

	spi_set_drvdata(spi, drm);

	drm_fbdev_generic_setup(drm, 0);

	return 0;
	}

	static int ili9341_remove(struct spi_device *spi)
	{
	struct drm_device *drm = spi_get_drvdata(spi);

	drm_dev_unplug(drm);
	drm_atomic_helper_shutdown(drm);

	return 0;
	}

	static void ili9341_shutdown(struct spi_device *spi)
	{
	drm_atomic_helper_shutdown(spi_get_drvdata(spi));
	}

	static struct spi_driver ili9341_spi_driver = {
	.driver = {
	.name = "ili9341",
	.of_match_table = ili9341_of_match,
	},
	.id_table = ili9341_id,
	.probe = ili9341_probe,
	.remove = ili9341_remove,
	.shutdown = ili9341_shutdown,
	};
	module_spi_driver(ili9341_spi_driver);

	MODULE_DESCRIPTION("Ilitek ILI9341 DRM driver");
	MODULE_AUTHOR("David Lechner <david@lechnology.com>");
	MODULE_LICENSE("GPL");