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Subject[PATCH v4 7/7] drm/tinydrm: Add support for Multi-Inno MI0283QT display
Date
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>
Acked-by: Thierry Reding <treding@nvidia.com>
---
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 20b87eb..bc502ae 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4297,6 +4297,12 @@ 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 e00bcfc..3504c53 100644
--- a/drivers/gpu/drm/tinydrm/Kconfig
+++ b/drivers/gpu/drm/tinydrm/Kconfig
@@ -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.
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 */
--
2.10.2
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