[thirdparty/kernel/stable.git] / drivers / gpu / drm / tinydrm / mi0283qt.c

/*
 * 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_drv.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_modeset_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 = mipi_dbi_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,
	DRM_GEM_CMA_VMAP_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");
Commit	Line	Data
1f47e6cb NT	1	/*
	2	* DRM driver for Multi-Inno MI0283QT panels
	3	*
	4	* Copyright 2016 Noralf Trønnes
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*/
	11
d1a2e700	12	#include <linux/backlight.h>
1f47e6cb NT	13	#include <linux/delay.h>
	14	#include <linux/gpio/consumer.h>
	15	#include <linux/module.h>
	16	#include <linux/property.h>
	17	#include <linux/regulator/consumer.h>
	18	#include <linux/spi/spi.h>
2a678996	19
84056e9b	20	#include <drm/drm_drv.h>
3db8d37d	21	#include <drm/drm_gem_cma_helper.h>
ccc3b2b3	22	#include <drm/drm_gem_framebuffer_helper.h>
3db8d37d	23	#include <drm/drm_modeset_helper.h>
2a678996 NT	24	#include <drm/tinydrm/mipi-dbi.h>
2a678996 NT	25	#include <drm/tinydrm/tinydrm-helpers.h>
1f47e6cb NT	26	#include <video/mipi_display.h>
1f47e6cb NT	27
24e05e7a NT	28	#define ILI9341_FRMCTR1 0xb1
	29	#define ILI9341_DISCTRL 0xb6
	30	#define ILI9341_ETMOD 0xb7
	31
	32	#define ILI9341_PWCTRL1 0xc0
	33	#define ILI9341_PWCTRL2 0xc1
	34	#define ILI9341_VMCTRL1 0xc5
	35	#define ILI9341_VMCTRL2 0xc7
	36	#define ILI9341_PWCTRLA 0xcb
	37	#define ILI9341_PWCTRLB 0xcf
	38
	39	#define ILI9341_PGAMCTRL 0xe0
	40	#define ILI9341_NGAMCTRL 0xe1
	41	#define ILI9341_DTCTRLA 0xe8
	42	#define ILI9341_DTCTRLB 0xea
	43	#define ILI9341_PWRSEQ 0xed
	44
	45	#define ILI9341_EN3GAM 0xf2
	46	#define ILI9341_PUMPCTRL 0xf7
	47
	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
f730eceb	53	static void mi0283qt_enable(struct drm_simple_display_pipe *pipe,
0c9c7fd0 VS	54	struct drm_crtc_state *crtc_state,
0c9c7fd0 VS	55	struct drm_plane_state *plane_state)
1f47e6cb	56	{
f730eceb NT	57	struct tinydrm_device *tdev = pipe_to_tinydrm(pipe);
f730eceb NT	58	struct mipi_dbi *mipi = mipi_dbi_from_tinydrm(tdev);
1f47e6cb NT	59	u8 addr_mode;
	60	int ret;
	61
	62	DRM_DEBUG_KMS("\n");
	63
070ab128 NT	64	ret = mipi_dbi_poweron_conditional_reset(mipi);
070ab128 NT	65	if (ret < 0)
f730eceb	66	return;
070ab128	67	if (ret == 1)
f730eceb	68	goto out_enable;
1f47e6cb	69
1f47e6cb NT	70	mipi_dbi_command(mipi, MIPI_DCS_SET_DISPLAY_OFF);
	71
	72	mipi_dbi_command(mipi, ILI9341_PWCTRLB, 0x00, 0x83, 0x30);
	73	mipi_dbi_command(mipi, ILI9341_PWRSEQ, 0x64, 0x03, 0x12, 0x81);
	74	mipi_dbi_command(mipi, ILI9341_DTCTRLA, 0x85, 0x01, 0x79);
	75	mipi_dbi_command(mipi, ILI9341_PWCTRLA, 0x39, 0x2c, 0x00, 0x34, 0x02);
	76	mipi_dbi_command(mipi, ILI9341_PUMPCTRL, 0x20);
	77	mipi_dbi_command(mipi, ILI9341_DTCTRLB, 0x00, 0x00);
	78
	79	/* Power Control */
	80	mipi_dbi_command(mipi, ILI9341_PWCTRL1, 0x26);
	81	mipi_dbi_command(mipi, ILI9341_PWCTRL2, 0x11);
	82	/* VCOM */
	83	mipi_dbi_command(mipi, ILI9341_VMCTRL1, 0x35, 0x3e);
	84	mipi_dbi_command(mipi, ILI9341_VMCTRL2, 0xbe);
	85
	86	/* Memory Access Control */
24e05e7a	87	mipi_dbi_command(mipi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT);
1f47e6cb	88
1f47e6cb NT	89	/* Frame Rate */
	90	mipi_dbi_command(mipi, ILI9341_FRMCTR1, 0x00, 0x1b);
	91
	92	/* Gamma */
	93	mipi_dbi_command(mipi, ILI9341_EN3GAM, 0x08);
	94	mipi_dbi_command(mipi, MIPI_DCS_SET_GAMMA_CURVE, 0x01);
	95	mipi_dbi_command(mipi, ILI9341_PGAMCTRL,
	96	0x1f, 0x1a, 0x18, 0x0a, 0x0f, 0x06, 0x45, 0x87,
	97	0x32, 0x0a, 0x07, 0x02, 0x07, 0x05, 0x00);
	98	mipi_dbi_command(mipi, ILI9341_NGAMCTRL,
	99	0x00, 0x25, 0x27, 0x05, 0x10, 0x09, 0x3a, 0x78,
	100	0x4d, 0x05, 0x18, 0x0d, 0x38, 0x3a, 0x1f);
	101
	102	/* DDRAM */
	103	mipi_dbi_command(mipi, ILI9341_ETMOD, 0x07);
	104
	105	/* Display */
	106	mipi_dbi_command(mipi, ILI9341_DISCTRL, 0x0a, 0x82, 0x27, 0x00);
	107	mipi_dbi_command(mipi, MIPI_DCS_EXIT_SLEEP_MODE);
	108	msleep(100);
	109
	110	mipi_dbi_command(mipi, MIPI_DCS_SET_DISPLAY_ON);
	111	msleep(100);
	112
f730eceb	113	out_enable:
9f99963a TC	114	/* The PiTFT (ili9340) has a hardware reset circuit that
	115	* resets only on power-on and not on each reboot through
	116	* a gpio like the rpi-display does.
	117	* As a result, we need to always apply the rotation value
	118	* regardless of the display "on/off" state.
	119	*/
	120	switch (mipi->rotation) {
	121	default:
	122	addr_mode = ILI9341_MADCTL_MV \| ILI9341_MADCTL_MY \|
	123	ILI9341_MADCTL_MX;
	124	break;
	125	case 90:
	126	addr_mode = ILI9341_MADCTL_MY;
	127	break;
	128	case 180:
	129	addr_mode = ILI9341_MADCTL_MV;
	130	break;
	131	case 270:
	132	addr_mode = ILI9341_MADCTL_MX;
	133	break;
	134	}
	135	addr_mode \|= ILI9341_MADCTL_BGR;
	136	mipi_dbi_command(mipi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
e85d3006	137	mipi_dbi_enable_flush(mipi, crtc_state, plane_state);
1f47e6cb NT	138	}
	139
	140	static const struct drm_simple_display_pipe_funcs mi0283qt_pipe_funcs = {
f730eceb	141	.enable = mi0283qt_enable,
1f47e6cb	142	.disable = mipi_dbi_pipe_disable,
af741381	143	.update = mipi_dbi_pipe_update,
ccc3b2b3	144	.prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
1f47e6cb NT	145	};
	146
	147	static const struct drm_display_mode mi0283qt_mode = {
	148	TINYDRM_MODE(320, 240, 58, 43),
	149	};
	150
79b85d2b NT	151	DEFINE_DRM_GEM_CMA_FOPS(mi0283qt_fops);
79b85d2b NT	152
1f47e6cb NT	153	static struct drm_driver mi0283qt_driver = {
	154	.driver_features = DRIVER_GEM \| DRIVER_MODESET \| DRIVER_PRIME \|
	155	DRIVER_ATOMIC,
79b85d2b	156	.fops = &mi0283qt_fops,
3db8d37d	157	DRM_GEM_CMA_VMAP_DRIVER_OPS,
1f47e6cb NT	158	.debugfs_init = mipi_dbi_debugfs_init,
	159	.name = "mi0283qt",
	160	.desc = "Multi-Inno MI0283QT",
	161	.date = "20160614",
	162	.major = 1,
	163	.minor = 0,
	164	};
	165
	166	static const struct of_device_id mi0283qt_of_match[] = {
	167	{ .compatible = "multi-inno,mi0283qt" },
	168	{},
	169	};
	170	MODULE_DEVICE_TABLE(of, mi0283qt_of_match);
	171
	172	static const struct spi_device_id mi0283qt_id[] = {
	173	{ "mi0283qt", 0 },
	174	{ },
	175	};
	176	MODULE_DEVICE_TABLE(spi, mi0283qt_id);
	177
	178	static int mi0283qt_probe(struct spi_device *spi)
	179	{
	180	struct device *dev = &spi->dev;
1f47e6cb NT	181	struct mipi_dbi *mipi;
	182	struct gpio_desc *dc;
	183	u32 rotation = 0;
	184	int ret;
	185
	186	mipi = devm_kzalloc(dev, sizeof(*mipi), GFP_KERNEL);
	187	if (!mipi)
	188	return -ENOMEM;
	189
	190	mipi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
	191	if (IS_ERR(mipi->reset)) {
e43e8181	192	DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
1f47e6cb NT	193	return PTR_ERR(mipi->reset);
	194	}
	195
	196	dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW);
	197	if (IS_ERR(dc)) {
e43e8181	198	DRM_DEV_ERROR(dev, "Failed to get gpio 'dc'\n");
1f47e6cb NT	199	return PTR_ERR(dc);
	200	}
	201
	202	mipi->regulator = devm_regulator_get(dev, "power");
	203	if (IS_ERR(mipi->regulator))
	204	return PTR_ERR(mipi->regulator);
	205
27f6640c	206	mipi->backlight = devm_of_find_backlight(dev);
1f47e6cb NT	207	if (IS_ERR(mipi->backlight))
	208	return PTR_ERR(mipi->backlight);
	209
	210	device_property_read_u32(dev, "rotation", &rotation);
	211
ace98812 DL	212	ret = mipi_dbi_spi_init(spi, mipi, dc);
	213	if (ret)
	214	return ret;
	215
	216	ret = mipi_dbi_init(&spi->dev, mipi, &mi0283qt_pipe_funcs,
	217	&mi0283qt_driver, &mi0283qt_mode, rotation);
1f47e6cb NT	218	if (ret)
	219	return ret;
	220
1f47e6cb NT	221	spi_set_drvdata(spi, mipi);
1f47e6cb NT	222
95a0cfe9	223	return devm_tinydrm_register(&mipi->tinydrm);
1f47e6cb NT	224	}
	225
	226	static void mi0283qt_shutdown(struct spi_device *spi)
	227	{
	228	struct mipi_dbi *mipi = spi_get_drvdata(spi);
	229
	230	tinydrm_shutdown(&mipi->tinydrm);
	231	}
	232
	233	static int __maybe_unused mi0283qt_pm_suspend(struct device *dev)
	234	{
	235	struct mipi_dbi *mipi = dev_get_drvdata(dev);
1f47e6cb	236
f730eceb	237	return drm_mode_config_helper_suspend(mipi->tinydrm.drm);
1f47e6cb NT	238	}
	239
	240	static int __maybe_unused mi0283qt_pm_resume(struct device *dev)
	241	{
	242	struct mipi_dbi *mipi = dev_get_drvdata(dev);
1f47e6cb	243
6e8e9a01 NT	244	drm_mode_config_helper_resume(mipi->tinydrm.drm);
	245
	246	return 0;
1f47e6cb NT	247	}
	248
	249	static const struct dev_pm_ops mi0283qt_pm_ops = {
	250	SET_SYSTEM_SLEEP_PM_OPS(mi0283qt_pm_suspend, mi0283qt_pm_resume)
	251	};
	252
	253	static struct spi_driver mi0283qt_spi_driver = {
	254	.driver = {
	255	.name = "mi0283qt",
	256	.owner = THIS_MODULE,
	257	.of_match_table = mi0283qt_of_match,
	258	.pm = &mi0283qt_pm_ops,
	259	},
	260	.id_table = mi0283qt_id,
	261	.probe = mi0283qt_probe,
	262	.shutdown = mi0283qt_shutdown,
	263	};
	264	module_spi_driver(mi0283qt_spi_driver);
	265
	266	MODULE_DESCRIPTION("Multi-Inno MI0283QT DRM driver");
	267	MODULE_AUTHOR("Noralf Trønnes");
	268	MODULE_LICENSE("GPL");