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Commit 1f47e6cb authored by Noralf Trønnes's avatar Noralf Trønnes
Browse files

drm/tinydrm: Add support for Multi-Inno MI0283QT display 



Add driver to support the Multi-Inno MI0283QT display panel.
It has an ILI9341 MIPI DBI compatible display controller.

Signed-off-by: default avatarNoralf Trønnes <noralf@tronnes.org>
Acked-by: default avatarThierry Reding <treding@nvidia.com>
parent 6b4e48b5

MAINTAINERS

+6 −0
Original line number Diff line number Diff line
@@ -4245,6 +4245,12 @@ S: Supported 
F:	drivers/gpu/drm/mediatek/

F:	Documentation/devicetree/bindings/display/mediatek/



DRM DRIVER FOR MI0283QT

M:	Noralf Trønnes <noralf@tronnes.org>

S:	Maintained

F:	drivers/gpu/drm/tinydrm/mi0283qt.c

F:	Documentation/devicetree/bindings/display/multi-inno,mi0283qt.txt



DRM DRIVER FOR MSM ADRENO GPU

M:	Rob Clark <robdclark@gmail.com>

L:	linux-arm-msm@vger.kernel.org

drivers/gpu/drm/tinydrm/Kconfig

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Original line number Diff line number Diff line
@@ -11,3 +11,11 @@ menuconfig DRM_TINYDRM 


config TINYDRM_MIPI_DBI

	tristate



config TINYDRM_MI0283QT

	tristate "DRM support for MI0283QT"

	depends on DRM_TINYDRM && SPI

	select TINYDRM_MIPI_DBI

	help

	  DRM driver for the Multi-Inno MI0283QT display panel

	  If M is selected the module will be called mi0283qt.

drivers/gpu/drm/tinydrm/Makefile

+3 −0
Original line number Diff line number Diff line
@@ -2,3 +2,6 @@ obj-$(CONFIG_DRM_TINYDRM) += core/ 


# Controllers

obj-$(CONFIG_TINYDRM_MIPI_DBI)		+= mipi-dbi.o



# Displays

obj-$(CONFIG_TINYDRM_MI0283QT)		+= mi0283qt.o

drivers/gpu/drm/tinydrm/mi0283qt.c

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+279 −0
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/*

 * 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 <drm/tinydrm/ili9341.h>

#include <drm/tinydrm/mipi-dbi.h>

#include <drm/tinydrm/tinydrm-helpers.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 <video/mipi_display.h>



static int mi0283qt_init(struct mipi_dbi *mipi)

{

	struct tinydrm_device *tdev = &mipi->tinydrm;

	struct device *dev = tdev->drm->dev;

	u8 addr_mode;

	int ret;



	DRM_DEBUG_KMS("\n");



	ret = regulator_enable(mipi->regulator);

	if (ret) {

		dev_err(dev, "Failed to enable regulator %d\n", ret);

		return ret;

	}



	/* Avoid flicker by skipping setup if the bootloader has done it */

	if (mipi_dbi_display_is_on(mipi))

		return 0;



	mipi_dbi_hw_reset(mipi);

	ret = mipi_dbi_command(mipi, MIPI_DCS_SOFT_RESET);

	if (ret) {

		dev_err(dev, "Error sending command %d\n", ret);

		regulator_disable(mipi->regulator);

		return ret;

	}



	msleep(20);



	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, 0x55);



	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);



	/* 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);



	return 0;

}



static void mi0283qt_fini(void *data)

{

	struct mipi_dbi *mipi = data;



	DRM_DEBUG_KMS("\n");

	regulator_disable(mipi->regulator);

}



static const struct drm_simple_display_pipe_funcs mi0283qt_pipe_funcs = {

	.enable = mipi_dbi_pipe_enable,

	.disable = mipi_dbi_pipe_disable,

	.update = tinydrm_display_pipe_update,

	.prepare_fb = tinydrm_display_pipe_prepare_fb,

};



static const struct drm_display_mode mi0283qt_mode = {

	TINYDRM_MODE(320, 240, 58, 43),

};



static struct drm_driver mi0283qt_driver = {

	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME |

				  DRIVER_ATOMIC,

	TINYDRM_GEM_DRIVER_OPS,

	.lastclose		= tinydrm_lastclose,

	.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 tinydrm_device *tdev;

	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)) {

		dev_err(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)) {

		dev_err(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 = tinydrm_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, &mi0283qt_pipe_funcs,

				&mi0283qt_driver, &mi0283qt_mode, rotation);

	if (ret)

		return ret;



	ret = mi0283qt_init(mipi);

	if (ret)

		return ret;



	/* use devres to fini after drm unregister (drv->remove is before) */

	ret = devm_add_action(dev, mi0283qt_fini, mipi);

	if (ret) {

		mi0283qt_fini(mipi);

		return ret;

	}



	tdev = &mipi->tinydrm;



	ret = devm_tinydrm_register(tdev);

	if (ret)

		return ret;



	spi_set_drvdata(spi, mipi);



	DRM_DEBUG_DRIVER("Initialized %s:%s @%uMHz on minor %d\n",

			 tdev->drm->driver->name, dev_name(dev),

			 spi->max_speed_hz / 1000000,

			 tdev->drm->primary->index);



	return 0;

}



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);

	int ret;



	ret = tinydrm_suspend(&mipi->tinydrm);

	if (ret)

		return ret;



	mi0283qt_fini(mipi);



	return 0;

}



static int __maybe_unused mi0283qt_pm_resume(struct device *dev)

{

	struct mipi_dbi *mipi = dev_get_drvdata(dev);

	int ret;



	ret = mi0283qt_init(mipi);

	if (ret)

		return ret;



	return tinydrm_resume(&mipi->tinydrm);

}



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");

include/drm/tinydrm/ili9341.h

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+54 −0
Original line number Diff line number Diff line 
/*

 * ILI9341 LCD controller

 *

 * 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.

 */



#ifndef __LINUX_ILI9341_H

#define __LINUX_ILI9341_H



#define ILI9341_FRMCTR1    0xb1

#define ILI9341_FRMCTR2    0xb2

#define ILI9341_FRMCTR3    0xb3

#define ILI9341_INVTR      0xb4

#define ILI9341_PRCTR      0xb5

#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_RDID1      0xda

#define ILI9341_RDID2      0xdb

#define ILI9341_RDID3      0xdc

#define ILI9341_RDID4      0xd3



#define ILI9341_PGAMCTRL   0xe0

#define ILI9341_NGAMCTRL   0xe1

#define ILI9341_DGAMCTRL1  0xe2

#define ILI9341_DGAMCTRL2  0xe3

#define ILI9341_DTCTRLA    0xe8

#define ILI9341_DTCTRLB    0xea

#define ILI9341_PWRSEQ     0xed



#define ILI9341_EN3GAM     0xf2

#define ILI9341_IFCTRL     0xf6

#define ILI9341_PUMPCTRL   0xf7



#define ILI9341_MADCTL_MH  BIT(2)

#define ILI9341_MADCTL_BGR BIT(3)

#define ILI9341_MADCTL_ML  BIT(4)

#define ILI9341_MADCTL_MV  BIT(5)

#define ILI9341_MADCTL_MX  BIT(6)

#define ILI9341_MADCTL_MY  BIT(7)



#endif /* __LINUX_ILI9341_H */