--- /dev/null
+// 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_cma_helper.h>
+#include <drm/drm_gem_framebuffer_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_fb_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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