Added ILI9340 TinyDRM driver

sysdrv/source/kernel/drivers/gpu/drm/tiny/Kconfig

@@ -53,6 +53,18 @@ config TINYDRM_ILI9225
 
 	  If M is selected the module will be called ili9225.
 
+config TINYDRM_ILI9340
+	tristate "DRM support for ILI9340 display panels"
+	depends on DRM && SPI
+	select DRM_KMS_HELPER
+	select DRM_KMS_CMA_HELPER
+	select DRM_MIPI_DBI
+	select BACKLIGHT_CLASS_DEVICE
+	help
+	  DRM driver for some Ilitek ILI9340 panels
+
+	  If M is selected the module will be called ili9340.
+
 config TINYDRM_ILI9341
 	tristate "DRM support for ILI9341 display panels"
 	depends on DRM && SPI

sysdrv/source/kernel/drivers/gpu/drm/tiny/Makefile

@@ -4,6 +4,7 @@ obj-$(CONFIG_DRM_CIRRUS_QEMU)		+= cirrus.o
 obj-$(CONFIG_DRM_GM12U320)		+= gm12u320.o
 obj-$(CONFIG_TINYDRM_HX8357D)		+= hx8357d.o
 obj-$(CONFIG_TINYDRM_ILI9225)		+= ili9225.o
+obj-$(CONFIG_TINYDRM_ILI9340)		+= ili9340.o
 obj-$(CONFIG_TINYDRM_ILI9341)		+= ili9341.o
 obj-$(CONFIG_TINYDRM_ILI9486)		+= ili9486.o
 obj-$(CONFIG_TINYDRM_MI0283QT)		+= mi0283qt.o

sysdrv/source/kernel/drivers/gpu/drm/tiny/ili9340.c

@@ -0,0 +1,278 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * DRM driver for Ilitek ILI9340 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_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_managed.h>
+#include <drm/drm_mipi_dbi.h>
+#include <drm/drm_modeset_helper.h>
+#include <video/mipi_display.h>
+
+
+#define ILI9340_VENDOR		0xEF
+
+#define ILI9340_FRMCTR1		0xb1
+#define ILI9340_DISCTRL		0xb6
+#define ILI9340_ETMOD		0xb7
+
+#define ILI9340_PWCTRL1		0xc0
+#define ILI9340_PWCTRL2		0xc1
+#define ILI9340_VMCTRL1		0xc5
+#define ILI9340_VMCTRL2		0xc7
+#define ILI9340_PWCTRLA		0xcb
+#define ILI9340_PWCTRLB		0xcf
+
+#define ILI9340_PGAMCTRL	0xe0
+#define ILI9340_NGAMCTRL	0xe1
+#define ILI9340_DTCTRLA		0xe8
+#define ILI9340_DTCTRLB		0xea
+#define ILI9340_PWRSEQ		0xed
+
+#define ILI9340_EN3GAM		0xf2
+#define ILI9340_PUMPCTRL	0xf7
+
+#define ILI9340_MADCTL_BGR	BIT(3)
+#define ILI9340_MADCTL_MV	BIT(5)
+#define ILI9340_MADCTL_MX	BIT(6)
+#define ILI9340_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;
+
+	mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF);
+
+	mipi_dbi_command(dbi, ILI9340_VENDOR, 0x03, 0x80, 0x02);
+
+	mipi_dbi_command(dbi, ILI9340_PWCTRLB, 0x00, 0xc1, 0x30); // OK
+	mipi_dbi_command(dbi, ILI9340_PWRSEQ, 0x64, 0x03, 0x12, 0x81); // OK
+	mipi_dbi_command(dbi, ILI9340_DTCTRLA, 0x85, 0x00, 0x78); // OK
+	mipi_dbi_command(dbi, ILI9340_PWCTRLA, 0x39, 0x2c, 0x00, 0x34, 0x02); // OK
+	mipi_dbi_command(dbi, ILI9340_PUMPCTRL, 0x20); // OK
+	mipi_dbi_command(dbi, ILI9340_DTCTRLB, 0x00, 0x00); // OK
+
+	/* Power Control */
+	mipi_dbi_command(dbi, ILI9340_PWCTRL1, 0x23); // OK
+	mipi_dbi_command(dbi, ILI9340_PWCTRL2, 0x10); // OK
+
+	/* VCOM */
+	mipi_dbi_command(dbi, ILI9340_VMCTRL1, 0x3e, 0x28); // OK
+	mipi_dbi_command(dbi, ILI9340_VMCTRL2, 0x86); // OK
+
+	/* Memory Access Control */
+	//mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT);
+	mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, 0x55); // OK
+
+	/* Frame Rate */
+	mipi_dbi_command(dbi, ILI9340_FRMCTR1, 0x00, 0x18); // OK
+
+	/* Gamma */
+	mipi_dbi_command(dbi, ILI9340_EN3GAM, 0x00); // OK
+	mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, 0x01); // OK
+	/*mipi_dbi_command(dbi, ILI9340_PGAMCTRL,
+			 0x0f, 0x31, 0x2b, 0x0c, 0x0e, 0x08, 0x4e, 0xf1,
+			 0x37, 0x07, 0x10, 0x03, 0x0e, 0x09, 0x00); // OK
+	mipi_dbi_command(dbi, ILI9340_NGAMCTRL,
+			 0x00, 0x0e, 0x14, 0x03, 0x11, 0x07, 0x31, 0xc1,
+			 0x48, 0x08, 0x0f, 0x0c, 0x31, 0x36, 0x0f); // OK*/
+
+	/*mipi_dbi_command(dbi, ILI9340_PGAMCTRL,
+		0x1F, 0x1A, 0x18, 0x0A, 0x0F, 0x06, 0x45, 0x87,
+		0x32, 0x0A, 0x07, 0x02, 0x07, 0x05, 0x00);
+
+	mipi_dbi_command(dbi, ILI9340_NGAMCTRL,
+		0x00, 0x25, 0x27, 0x05, 0x10, 0x09, 0x3A, 0x78,
+		0x4D, 0x05, 0x18, 0x0D, 0x38, 0x3A, 0x1F);*/
+
+	/* DDRAM */
+	//mipi_dbi_command(dbi, ILI9340_ETMOD, 0x07);
+
+	/* Display */
+	mipi_dbi_command(dbi, ILI9340_DISCTRL, 0x08, 0x82, 0x27); // OK
+	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 = ILI9340_MADCTL_MX;
+		break;
+	case 90:
+		addr_mode = ILI9340_MADCTL_MV;
+		break;
+	case 180:
+		addr_mode = ILI9340_MADCTL_MY;
+		break;
+	case 270:
+		addr_mode = ILI9340_MADCTL_MV | ILI9340_MADCTL_MY |
+			    ILI9340_MADCTL_MX;
+		break;
+	}
+	//addr_mode |= ILI9340_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 ili9340_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(320, 240, 37, 49),
+};
+
+DEFINE_DRM_GEM_CMA_FOPS(ili9340_fops);
+
+static struct drm_driver ili9340_driver = {
+	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
+	.fops			= &ili9340_fops,
+	DRM_GEM_CMA_DRIVER_OPS_VMAP,
+	.debugfs_init		= mipi_dbi_debugfs_init,
+	.name			= "ili9340",
+	.desc			= "Ilitek ILI9340",
+	.date			= "20250928",
+	.major			= 1,
+	.minor			= 0,
+};
+
+static const struct of_device_id ili9340_of_match[] = {
+	{ .compatible = "tenstar,robo28" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, ili9340_of_match);
+
+static const struct spi_device_id ili9340_id[] = {
+	{ "robo28", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(spi, ili9340_id);
+
+static int ili9340_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, &ili9340_driver,
+				    struct mipi_dbi_dev, drm);
+	if (IS_ERR(dbidev))
+		return PTR_ERR(dbidev);
+
+	dbi = &dbidev->dbi;
+	drm = &dbidev->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, &ili9340_pipe_funcs, &yx240qv29_mode, rotation);
+	if (ret)
+		return ret;
+
+	drm_mode_config_reset(drm);
+
+	ret = drm_dev_register(drm, 0);
+	if (ret)
+		return ret;
+
+	spi_set_drvdata(spi, drm);
+
+	drm_fbdev_generic_setup(drm, 0);
+
+	return 0;
+}
+
+static int ili9340_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 ili9340_shutdown(struct spi_device *spi)
+{
+	drm_atomic_helper_shutdown(spi_get_drvdata(spi));
+}
+
+static struct spi_driver ili9340_spi_driver = {
+	.driver = {
+		.name = "ili9340",
+		.of_match_table = ili9340_of_match,
+	},
+	.id_table = ili9340_id,
+	.probe = ili9340_probe,
+	.remove = ili9340_remove,
+	.shutdown = ili9340_shutdown,
+};
+module_spi_driver(ili9340_spi_driver);
+
+MODULE_DESCRIPTION("Ilitek ILI9340 DRM driver");
+MODULE_AUTHOR("David Lechner <david@lechnology.com>");
+MODULE_AUTHOR("Kimi Piiroinen <ksieni@gmail.com>");
+MODULE_LICENSE("GPL");