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// SPDX-License-Identifier: GPL-2.0+
#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_atomic_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_mipi_dbi.h>
#include <drm/drm_modeset_helper.h>
#include <video/mipi_display.h>
#define ILI9163_FRMCTR1 0xb1
#define ILI9163_PWCTRL1 0xc0
#define ILI9163_PWCTRL2 0xc1
#define ILI9163_VMCTRL1 0xc5
#define ILI9163_VMCTRL2 0xc7
#define ILI9163_PWCTRLA 0xcb
#define ILI9163_PWCTRLB 0xcf
#define ILI9163_EN3GAM 0xf2
#define ILI9163_MADCTL_BGR BIT(3)
#define ILI9163_MADCTL_MV BIT(5)
#define ILI9163_MADCTL_MX BIT(6)
#define ILI9163_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;
/* Gamma */
mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, 0x04);
mipi_dbi_command(dbi, ILI9163_EN3GAM, 0x00);
/* Frame Rate */
mipi_dbi_command(dbi, ILI9163_FRMCTR1, 0x0a, 0x14);
/* Power Control */
mipi_dbi_command(dbi, ILI9163_PWCTRL1, 0x0a, 0x00);
mipi_dbi_command(dbi, ILI9163_PWCTRL2, 0x02);
/* VCOM */
mipi_dbi_command(dbi, ILI9163_VMCTRL1, 0x2f, 0x3e);
mipi_dbi_command(dbi, ILI9163_VMCTRL2, 0x40);
/* Memory Access Control */
mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT);
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 = ILI9163_MADCTL_MX | ILI9163_MADCTL_MY;
break;
case 90:
addr_mode = ILI9163_MADCTL_MX | ILI9163_MADCTL_MV;
break;
case 180:
addr_mode = 0;
break;
case 270:
addr_mode = ILI9163_MADCTL_MY | ILI9163_MADCTL_MV;
break;
}
addr_mode |= ILI9163_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 ili9163_pipe_funcs = {
.enable = yx240qv29_enable,
.disable = mipi_dbi_pipe_disable,
.update = mipi_dbi_pipe_update,
.prepare_fb = drm_gem_simple_display_pipe_prepare_fb,
};
static const struct drm_display_mode yx240qv29_mode = {
DRM_SIMPLE_MODE(128, 160, 28, 35),
};
DEFINE_DRM_GEM_CMA_FOPS(ili9163_fops);
static struct drm_driver ili9163_driver = {
.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
.fops = &ili9163_fops,
DRM_GEM_CMA_DRIVER_OPS_VMAP,
.debugfs_init = mipi_dbi_debugfs_init,
.name = "ili9163",
.desc = "Ilitek ILI9163",
.date = "20210208",
.major = 1,
.minor = 0,
};
static const struct of_device_id ili9163_of_match[] = {
{ .compatible = "newhaven,1.8-128160EF" },
{ }
};
MODULE_DEVICE_TABLE(of, ili9163_of_match);
static const struct spi_device_id ili9163_id[] = {
{ "nhd-1.8-128160EF", 0 },
{ }
};
MODULE_DEVICE_TABLE(spi, ili9163_id);
static int ili9163_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 = devm_drm_dev_alloc(dev, &ili9163_driver,
struct mipi_dbi_dev, drm);
if (IS_ERR(dbidev))
return PTR_ERR(dbidev);
dbi = &dbidev->dbi;
drm = &dbidev->drm;
spi_set_drvdata(spi, 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, &ili9163_pipe_funcs, &yx240qv29_mode, rotation);
if (ret)
return ret;
drm_mode_config_reset(drm);
ret = drm_dev_register(drm, 0);
if (ret)
return ret;
drm_fbdev_generic_setup(drm, 0);
return 0;
}
static int ili9163_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 ili9163_shutdown(struct spi_device *spi)
{
drm_atomic_helper_shutdown(spi_get_drvdata(spi));
}
static struct spi_driver ili9163_spi_driver = {
.driver = {
.name = "ili9163",
.of_match_table = ili9163_of_match,
},
.id_table = ili9163_id,
.probe = ili9163_probe,
.remove = ili9163_remove,
.shutdown = ili9163_shutdown,
};
module_spi_driver(ili9163_spi_driver);
MODULE_DESCRIPTION("Ilitek ILI9163 DRM driver");
MODULE_AUTHOR("Daniel Mack <daniel@zonque.org>");
MODULE_LICENSE("GPL");
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