Add driver to support the Multi-Inno MI0283QT display panel. It has an ILI9341 MIPI DBI compatible display controller.
Signed-off-by: Noralf Trønnes noralf@tronnes.org --- MAINTAINERS | 6 + drivers/gpu/drm/tinydrm/Kconfig | 8 ++ drivers/gpu/drm/tinydrm/Makefile | 3 + drivers/gpu/drm/tinydrm/mi0283qt.c | 279 +++++++++++++++++++++++++++++++++++++ include/drm/tinydrm/ili9341.h | 54 +++++++ 5 files changed, 350 insertions(+) create mode 100644 drivers/gpu/drm/tinydrm/mi0283qt.c create mode 100644 include/drm/tinydrm/ili9341.h
diff --git a/MAINTAINERS b/MAINTAINERS index d935135..5c4666b 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -4278,6 +4278,12 @@ 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 diff --git a/drivers/gpu/drm/tinydrm/Kconfig b/drivers/gpu/drm/tinydrm/Kconfig index 128d2f3..d3161fd 100644 --- a/drivers/gpu/drm/tinydrm/Kconfig +++ b/drivers/gpu/drm/tinydrm/Kconfig @@ -9,3 +9,11 @@ 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. diff --git a/drivers/gpu/drm/tinydrm/Makefile b/drivers/gpu/drm/tinydrm/Makefile index fe5d4c6..7a3604c 100644 --- a/drivers/gpu/drm/tinydrm/Makefile +++ b/drivers/gpu/drm/tinydrm/Makefile @@ -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 diff --git a/drivers/gpu/drm/tinydrm/mi0283qt.c b/drivers/gpu/drm/tinydrm/mi0283qt.c new file mode 100644 index 0000000..b29fe86 --- /dev/null +++ b/drivers/gpu/drm/tinydrm/mi0283qt.c @@ -0,0 +1,279 @@ +/* + * 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"); diff --git a/include/drm/tinydrm/ili9341.h b/include/drm/tinydrm/ili9341.h new file mode 100644 index 0000000..807a09f --- /dev/null +++ b/include/drm/tinydrm/ili9341.h @@ -0,0 +1,54 @@ +/* + * 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 */