--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * DRM driver for Ilitek ILI9341 panels
+ *
+ * Copyright 2018 David Lechner <david@lechnology.com>
+ *
+ * Based on mi0283qt.c:
+ * Copyright 2016 Noralf Trønnes
+ */
+
+#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_fb_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_modeset_helper.h>
+#include <drm/tinydrm/mipi-dbi.h>
+#include <drm/tinydrm/tinydrm-helpers.h>
+#include <video/mipi_display.h>
+
+#define ILI9341_FRMCTR1 0xb1
+#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_PGAMCTRL 0xe0
+#define ILI9341_NGAMCTRL 0xe1
+#define ILI9341_DTCTRLA 0xe8
+#define ILI9341_DTCTRLB 0xea
+#define ILI9341_PWRSEQ 0xed
+
+#define ILI9341_EN3GAM 0xf2
+#define ILI9341_PUMPCTRL 0xf7
+
+#define ILI9341_MADCTL_BGR BIT(3)
+#define ILI9341_MADCTL_MV BIT(5)
+#define ILI9341_MADCTL_MX BIT(6)
+#define ILI9341_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 tinydrm_device *tdev = pipe_to_tinydrm(pipe);
+ struct mipi_dbi *mipi = mipi_dbi_from_tinydrm(tdev);
+ u8 addr_mode;
+ int ret;
+
+ DRM_DEBUG_KMS("\n");
+
+ ret = mipi_dbi_poweron_conditional_reset(mipi);
+ if (ret < 0)
+ return;
+ if (ret == 1)
+ goto out_enable;
+
+ mipi_dbi_command(mipi, MIPI_DCS_SET_DISPLAY_OFF);
+
+ mipi_dbi_command(mipi, ILI9341_PWCTRLB, 0x00, 0xc1, 0x30);
+ mipi_dbi_command(mipi, ILI9341_PWRSEQ, 0x64, 0x03, 0x12, 0x81);
+ mipi_dbi_command(mipi, ILI9341_DTCTRLA, 0x85, 0x00, 0x78);
+ 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, 0x23);
+ mipi_dbi_command(mipi, ILI9341_PWCTRL2, 0x10);
+ /* VCOM */
+ mipi_dbi_command(mipi, ILI9341_VMCTRL1, 0x3e, 0x28);
+ mipi_dbi_command(mipi, ILI9341_VMCTRL2, 0x86);
+
+ /* Memory Access Control */
+ mipi_dbi_command(mipi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT);
+
+ /* Frame Rate */
+ mipi_dbi_command(mipi, ILI9341_FRMCTR1, 0x00, 0x1b);
+
+ /* Gamma */
+ mipi_dbi_command(mipi, ILI9341_EN3GAM, 0x00);
+ mipi_dbi_command(mipi, MIPI_DCS_SET_GAMMA_CURVE, 0x01);
+ mipi_dbi_command(mipi, ILI9341_PGAMCTRL,
+ 0x0f, 0x31, 0x2b, 0x0c, 0x0e, 0x08, 0x4e, 0xf1,
+ 0x37, 0x07, 0x10, 0x03, 0x0e, 0x09, 0x00);
+ mipi_dbi_command(mipi, ILI9341_NGAMCTRL,
+ 0x00, 0x0e, 0x14, 0x03, 0x11, 0x07, 0x31, 0xc1,
+ 0x48, 0x08, 0x0f, 0x0c, 0x31, 0x36, 0x0f);
+
+ /* DDRAM */
+ mipi_dbi_command(mipi, ILI9341_ETMOD, 0x07);
+
+ /* Display */
+ mipi_dbi_command(mipi, ILI9341_DISCTRL, 0x08, 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);
+
+out_enable:
+ switch (mipi->rotation) {
+ default:
+ addr_mode = ILI9341_MADCTL_MX;
+ break;
+ case 90:
+ addr_mode = ILI9341_MADCTL_MV;
+ break;
+ case 180:
+ addr_mode = ILI9341_MADCTL_MY;
+ break;
+ case 270:
+ addr_mode = ILI9341_MADCTL_MV | ILI9341_MADCTL_MY |
+ ILI9341_MADCTL_MX;
+ break;
+ }
+ addr_mode |= ILI9341_MADCTL_BGR;
+ mipi_dbi_command(mipi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
+ mipi_dbi_enable_flush(mipi, crtc_state, plane_state);
+}
+
+static const struct drm_simple_display_pipe_funcs ili9341_pipe_funcs = {
+ .enable = yx240qv29_enable,
+ .disable = mipi_dbi_pipe_disable,
+ .update = tinydrm_display_pipe_update,
+ .prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
+};
+
+static const struct drm_display_mode yx240qv29_mode = {
+ TINYDRM_MODE(240, 320, 37, 49),
+};
+
+DEFINE_DRM_GEM_CMA_FOPS(ili9341_fops);
+
+static struct drm_driver ili9341_driver = {
+ .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME | DRIVER_ATOMIC,
+ .fops = &ili9341_fops,
+ TINYDRM_GEM_DRIVER_OPS,
+ .lastclose = drm_fb_helper_lastclose,
+ .debugfs_init = mipi_dbi_debugfs_init,
+ .name = "ili9341",
+ .desc = "Ilitek ILI9341",
+ .date = "20180514",
+ .major = 1,
+ .minor = 0,
+};
+
+static const struct of_device_id ili9341_of_match[] = {
+ { .compatible = "adafruit,yx240qv29" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, ili9341_of_match);
+
+static const struct spi_device_id ili9341_id[] = {
+ { "yx240qv29", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(spi, ili9341_id);
+
+static int ili9341_probe(struct spi_device *spi)
+{
+ struct device *dev = &spi->dev;
+ 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)) {
+ DRM_DEV_ERROR(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)) {
+ DRM_DEV_ERROR(dev, "Failed to get gpio 'dc'\n");
+ return PTR_ERR(dc);
+ }
+
+ mipi->backlight = devm_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);
+ if (ret)
+ return ret;
+
+ ret = mipi_dbi_init(&spi->dev, mipi, &ili9341_pipe_funcs,
+ &ili9341_driver, &yx240qv29_mode, rotation);
+ if (ret)
+ return ret;
+
+ spi_set_drvdata(spi, mipi);
+
+ return devm_tinydrm_register(&mipi->tinydrm);
+}
+
+static void ili9341_shutdown(struct spi_device *spi)
+{
+ struct mipi_dbi *mipi = spi_get_drvdata(spi);
+
+ tinydrm_shutdown(&mipi->tinydrm);
+}
+
+static struct spi_driver ili9341_spi_driver = {
+ .driver = {
+ .name = "ili9341",
+ .of_match_table = ili9341_of_match,
+ },
+ .id_table = ili9341_id,
+ .probe = ili9341_probe,
+ .shutdown = ili9341_shutdown,
+};
+module_spi_driver(ili9341_spi_driver);
+
+MODULE_DESCRIPTION("Ilitek ILI9341 DRM driver");
+MODULE_AUTHOR("David Lechner <david@lechnology.com>");
+MODULE_LICENSE("GPL");
projects / mirror_ubuntu-disco-kernel.git / commitdiff