From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 20:49:45 +0200
Subject: Adding upstream version 6.1.76.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 drivers/gpu/drm/tiny/ili9225.c | 443 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 443 insertions(+)
 create mode 100644 drivers/gpu/drm/tiny/ili9225.c

(limited to 'drivers/gpu/drm/tiny/ili9225.c')

diff --git a/drivers/gpu/drm/tiny/ili9225.c b/drivers/gpu/drm/tiny/ili9225.c
new file mode 100644
index 000000000..a79da2b4a
--- /dev/null
+++ b/drivers/gpu/drm/tiny/ili9225.c
@@ -0,0 +1,443 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * DRM driver for Ilitek ILI9225 panels
+ *
+ * Copyright 2017 David Lechner <david@lechnology.com>
+ *
+ * Some code copied from mipi-dbi.c
+ * Copyright 2016 Noralf Trønnes
+ */
+
+#include <linux/delay.h>
+#include <linux/dma-buf.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/property.h>
+#include <linux/spi/spi.h>
+#include <video/mipi_display.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_damage_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fb_dma_helper.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_framebuffer.h>
+#include <drm/drm_gem_atomic_helper.h>
+#include <drm/drm_gem_dma_helper.h>
+#include <drm/drm_managed.h>
+#include <drm/drm_mipi_dbi.h>
+#include <drm/drm_rect.h>
+
+#define ILI9225_DRIVER_READ_CODE	0x00
+#define ILI9225_DRIVER_OUTPUT_CONTROL	0x01
+#define ILI9225_LCD_AC_DRIVING_CONTROL	0x02
+#define ILI9225_ENTRY_MODE		0x03
+#define ILI9225_DISPLAY_CONTROL_1	0x07
+#define ILI9225_BLANK_PERIOD_CONTROL_1	0x08
+#define ILI9225_FRAME_CYCLE_CONTROL	0x0b
+#define ILI9225_INTERFACE_CONTROL	0x0c
+#define ILI9225_OSCILLATION_CONTROL	0x0f
+#define ILI9225_POWER_CONTROL_1		0x10
+#define ILI9225_POWER_CONTROL_2		0x11
+#define ILI9225_POWER_CONTROL_3		0x12
+#define ILI9225_POWER_CONTROL_4		0x13
+#define ILI9225_POWER_CONTROL_5		0x14
+#define ILI9225_VCI_RECYCLING		0x15
+#define ILI9225_RAM_ADDRESS_SET_1	0x20
+#define ILI9225_RAM_ADDRESS_SET_2	0x21
+#define ILI9225_WRITE_DATA_TO_GRAM	0x22
+#define ILI9225_SOFTWARE_RESET		0x28
+#define ILI9225_GATE_SCAN_CONTROL	0x30
+#define ILI9225_VERTICAL_SCROLL_1	0x31
+#define ILI9225_VERTICAL_SCROLL_2	0x32
+#define ILI9225_VERTICAL_SCROLL_3	0x33
+#define ILI9225_PARTIAL_DRIVING_POS_1	0x34
+#define ILI9225_PARTIAL_DRIVING_POS_2	0x35
+#define ILI9225_HORIZ_WINDOW_ADDR_1	0x36
+#define ILI9225_HORIZ_WINDOW_ADDR_2	0x37
+#define ILI9225_VERT_WINDOW_ADDR_1	0x38
+#define ILI9225_VERT_WINDOW_ADDR_2	0x39
+#define ILI9225_GAMMA_CONTROL_1		0x50
+#define ILI9225_GAMMA_CONTROL_2		0x51
+#define ILI9225_GAMMA_CONTROL_3		0x52
+#define ILI9225_GAMMA_CONTROL_4		0x53
+#define ILI9225_GAMMA_CONTROL_5		0x54
+#define ILI9225_GAMMA_CONTROL_6		0x55
+#define ILI9225_GAMMA_CONTROL_7		0x56
+#define ILI9225_GAMMA_CONTROL_8		0x57
+#define ILI9225_GAMMA_CONTROL_9		0x58
+#define ILI9225_GAMMA_CONTROL_10	0x59
+
+static inline int ili9225_command(struct mipi_dbi *dbi, u8 cmd, u16 data)
+{
+	u8 par[2] = { data >> 8, data & 0xff };
+
+	return mipi_dbi_command_buf(dbi, cmd, par, 2);
+}
+
+static void ili9225_fb_dirty(struct drm_framebuffer *fb, struct drm_rect *rect)
+{
+	struct drm_gem_dma_object *dma_obj = drm_fb_dma_get_gem_obj(fb, 0);
+	struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(fb->dev);
+	unsigned int height = rect->y2 - rect->y1;
+	unsigned int width = rect->x2 - rect->x1;
+	struct mipi_dbi *dbi = &dbidev->dbi;
+	bool swap = dbi->swap_bytes;
+	u16 x_start, y_start;
+	u16 x1, x2, y1, y2;
+	int idx, ret = 0;
+	bool full;
+	void *tr;
+
+	if (!drm_dev_enter(fb->dev, &idx))
+		return;
+
+	full = width == fb->width && height == fb->height;
+
+	DRM_DEBUG_KMS("Flushing [FB:%d] " DRM_RECT_FMT "\n", fb->base.id, DRM_RECT_ARG(rect));
+
+	if (!dbi->dc || !full || swap ||
+	    fb->format->format == DRM_FORMAT_XRGB8888) {
+		tr = dbidev->tx_buf;
+		ret = mipi_dbi_buf_copy(dbidev->tx_buf, fb, rect, swap);
+		if (ret)
+			goto err_msg;
+	} else {
+		tr = dma_obj->vaddr;
+	}
+
+	switch (dbidev->rotation) {
+	default:
+		x1 = rect->x1;
+		x2 = rect->x2 - 1;
+		y1 = rect->y1;
+		y2 = rect->y2 - 1;
+		x_start = x1;
+		y_start = y1;
+		break;
+	case 90:
+		x1 = rect->y1;
+		x2 = rect->y2 - 1;
+		y1 = fb->width - rect->x2;
+		y2 = fb->width - rect->x1 - 1;
+		x_start = x1;
+		y_start = y2;
+		break;
+	case 180:
+		x1 = fb->width - rect->x2;
+		x2 = fb->width - rect->x1 - 1;
+		y1 = fb->height - rect->y2;
+		y2 = fb->height - rect->y1 - 1;
+		x_start = x2;
+		y_start = y2;
+		break;
+	case 270:
+		x1 = fb->height - rect->y2;
+		x2 = fb->height - rect->y1 - 1;
+		y1 = rect->x1;
+		y2 = rect->x2 - 1;
+		x_start = x2;
+		y_start = y1;
+		break;
+	}
+
+	ili9225_command(dbi, ILI9225_HORIZ_WINDOW_ADDR_1, x2);
+	ili9225_command(dbi, ILI9225_HORIZ_WINDOW_ADDR_2, x1);
+	ili9225_command(dbi, ILI9225_VERT_WINDOW_ADDR_1, y2);
+	ili9225_command(dbi, ILI9225_VERT_WINDOW_ADDR_2, y1);
+
+	ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_1, x_start);
+	ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_2, y_start);
+
+	ret = mipi_dbi_command_buf(dbi, ILI9225_WRITE_DATA_TO_GRAM, tr,
+				   width * height * 2);
+err_msg:
+	if (ret)
+		dev_err_once(fb->dev->dev, "Failed to update display %d\n", ret);
+
+	drm_dev_exit(idx);
+}
+
+static void ili9225_pipe_update(struct drm_simple_display_pipe *pipe,
+				struct drm_plane_state *old_state)
+{
+	struct drm_plane_state *state = pipe->plane.state;
+	struct drm_rect rect;
+
+	if (!pipe->crtc.state->active)
+		return;
+
+	if (drm_atomic_helper_damage_merged(old_state, state, &rect))
+		ili9225_fb_dirty(state->fb, &rect);
+}
+
+static void ili9225_pipe_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 drm_framebuffer *fb = plane_state->fb;
+	struct device *dev = pipe->crtc.dev->dev;
+	struct mipi_dbi *dbi = &dbidev->dbi;
+	struct drm_rect rect = {
+		.x1 = 0,
+		.x2 = fb->width,
+		.y1 = 0,
+		.y2 = fb->height,
+	};
+	int ret, idx;
+	u8 am_id;
+
+	if (!drm_dev_enter(pipe->crtc.dev, &idx))
+		return;
+
+	DRM_DEBUG_KMS("\n");
+
+	mipi_dbi_hw_reset(dbi);
+
+	/*
+	 * There don't seem to be two example init sequences that match, so
+	 * using the one from the popular Arduino library for this display.
+	 * https://github.com/Nkawu/TFT_22_ILI9225/blob/master/src/TFT_22_ILI9225.cpp
+	 */
+
+	ret = ili9225_command(dbi, ILI9225_POWER_CONTROL_1, 0x0000);
+	if (ret) {
+		DRM_DEV_ERROR(dev, "Error sending command %d\n", ret);
+		goto out_exit;
+	}
+	ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x0000);
+	ili9225_command(dbi, ILI9225_POWER_CONTROL_3, 0x0000);
+	ili9225_command(dbi, ILI9225_POWER_CONTROL_4, 0x0000);
+	ili9225_command(dbi, ILI9225_POWER_CONTROL_5, 0x0000);
+
+	msleep(40);
+
+	ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x0018);
+	ili9225_command(dbi, ILI9225_POWER_CONTROL_3, 0x6121);
+	ili9225_command(dbi, ILI9225_POWER_CONTROL_4, 0x006f);
+	ili9225_command(dbi, ILI9225_POWER_CONTROL_5, 0x495f);
+	ili9225_command(dbi, ILI9225_POWER_CONTROL_1, 0x0800);
+
+	msleep(10);
+
+	ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x103b);
+
+	msleep(50);
+
+	switch (dbidev->rotation) {
+	default:
+		am_id = 0x30;
+		break;
+	case 90:
+		am_id = 0x18;
+		break;
+	case 180:
+		am_id = 0x00;
+		break;
+	case 270:
+		am_id = 0x28;
+		break;
+	}
+	ili9225_command(dbi, ILI9225_DRIVER_OUTPUT_CONTROL, 0x011c);
+	ili9225_command(dbi, ILI9225_LCD_AC_DRIVING_CONTROL, 0x0100);
+	ili9225_command(dbi, ILI9225_ENTRY_MODE, 0x1000 | am_id);
+	ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x0000);
+	ili9225_command(dbi, ILI9225_BLANK_PERIOD_CONTROL_1, 0x0808);
+	ili9225_command(dbi, ILI9225_FRAME_CYCLE_CONTROL, 0x1100);
+	ili9225_command(dbi, ILI9225_INTERFACE_CONTROL, 0x0000);
+	ili9225_command(dbi, ILI9225_OSCILLATION_CONTROL, 0x0d01);
+	ili9225_command(dbi, ILI9225_VCI_RECYCLING, 0x0020);
+	ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_1, 0x0000);
+	ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_2, 0x0000);
+
+	ili9225_command(dbi, ILI9225_GATE_SCAN_CONTROL, 0x0000);
+	ili9225_command(dbi, ILI9225_VERTICAL_SCROLL_1, 0x00db);
+	ili9225_command(dbi, ILI9225_VERTICAL_SCROLL_2, 0x0000);
+	ili9225_command(dbi, ILI9225_VERTICAL_SCROLL_3, 0x0000);
+	ili9225_command(dbi, ILI9225_PARTIAL_DRIVING_POS_1, 0x00db);
+	ili9225_command(dbi, ILI9225_PARTIAL_DRIVING_POS_2, 0x0000);
+
+	ili9225_command(dbi, ILI9225_GAMMA_CONTROL_1, 0x0000);
+	ili9225_command(dbi, ILI9225_GAMMA_CONTROL_2, 0x0808);
+	ili9225_command(dbi, ILI9225_GAMMA_CONTROL_3, 0x080a);
+	ili9225_command(dbi, ILI9225_GAMMA_CONTROL_4, 0x000a);
+	ili9225_command(dbi, ILI9225_GAMMA_CONTROL_5, 0x0a08);
+	ili9225_command(dbi, ILI9225_GAMMA_CONTROL_6, 0x0808);
+	ili9225_command(dbi, ILI9225_GAMMA_CONTROL_7, 0x0000);
+	ili9225_command(dbi, ILI9225_GAMMA_CONTROL_8, 0x0a00);
+	ili9225_command(dbi, ILI9225_GAMMA_CONTROL_9, 0x0710);
+	ili9225_command(dbi, ILI9225_GAMMA_CONTROL_10, 0x0710);
+
+	ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x0012);
+
+	msleep(50);
+
+	ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x1017);
+
+	ili9225_fb_dirty(fb, &rect);
+out_exit:
+	drm_dev_exit(idx);
+}
+
+static void ili9225_pipe_disable(struct drm_simple_display_pipe *pipe)
+{
+	struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
+	struct mipi_dbi *dbi = &dbidev->dbi;
+
+	DRM_DEBUG_KMS("\n");
+
+	/*
+	 * This callback is not protected by drm_dev_enter/exit since we want to
+	 * turn off the display on regular driver unload. It's highly unlikely
+	 * that the underlying SPI controller is gone should this be called after
+	 * unplug.
+	 */
+
+	ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x0000);
+	msleep(50);
+	ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x0007);
+	msleep(50);
+	ili9225_command(dbi, ILI9225_POWER_CONTROL_1, 0x0a02);
+}
+
+static int ili9225_dbi_command(struct mipi_dbi *dbi, u8 *cmd, u8 *par,
+			       size_t num)
+{
+	struct spi_device *spi = dbi->spi;
+	unsigned int bpw = 8;
+	u32 speed_hz;
+	int ret;
+
+	gpiod_set_value_cansleep(dbi->dc, 0);
+	speed_hz = mipi_dbi_spi_cmd_max_speed(spi, 1);
+	ret = mipi_dbi_spi_transfer(spi, speed_hz, 8, cmd, 1);
+	if (ret || !num)
+		return ret;
+
+	if (*cmd == ILI9225_WRITE_DATA_TO_GRAM && !dbi->swap_bytes)
+		bpw = 16;
+
+	gpiod_set_value_cansleep(dbi->dc, 1);
+	speed_hz = mipi_dbi_spi_cmd_max_speed(spi, num);
+
+	return mipi_dbi_spi_transfer(spi, speed_hz, bpw, par, num);
+}
+
+static const struct drm_simple_display_pipe_funcs ili9225_pipe_funcs = {
+	.enable		= ili9225_pipe_enable,
+	.disable	= ili9225_pipe_disable,
+	.update		= ili9225_pipe_update,
+};
+
+static const struct drm_display_mode ili9225_mode = {
+	DRM_SIMPLE_MODE(176, 220, 35, 44),
+};
+
+DEFINE_DRM_GEM_DMA_FOPS(ili9225_fops);
+
+static const struct drm_driver ili9225_driver = {
+	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
+	.fops			= &ili9225_fops,
+	DRM_GEM_DMA_DRIVER_OPS_VMAP,
+	.name			= "ili9225",
+	.desc			= "Ilitek ILI9225",
+	.date			= "20171106",
+	.major			= 1,
+	.minor			= 0,
+};
+
+static const struct of_device_id ili9225_of_match[] = {
+	{ .compatible = "vot,v220hf01a-t" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, ili9225_of_match);
+
+static const struct spi_device_id ili9225_id[] = {
+	{ "v220hf01a-t", 0 },
+	{ },
+};
+MODULE_DEVICE_TABLE(spi, ili9225_id);
+
+static int ili9225_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 *rs;
+	u32 rotation = 0;
+	int ret;
+
+	dbidev = devm_drm_dev_alloc(dev, &ili9225_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(dev, "reset", GPIOD_OUT_HIGH);
+	if (IS_ERR(dbi->reset))
+		return dev_err_probe(dev, PTR_ERR(dbi->reset), "Failed to get GPIO 'reset'\n");
+
+	rs = devm_gpiod_get(dev, "rs", GPIOD_OUT_LOW);
+	if (IS_ERR(rs))
+		return dev_err_probe(dev, PTR_ERR(rs), "Failed to get GPIO 'rs'\n");
+
+	device_property_read_u32(dev, "rotation", &rotation);
+
+	ret = mipi_dbi_spi_init(spi, dbi, rs);
+	if (ret)
+		return ret;
+
+	/* override the command function set in  mipi_dbi_spi_init() */
+	dbi->command = ili9225_dbi_command;
+
+	ret = mipi_dbi_dev_init(dbidev, &ili9225_pipe_funcs, &ili9225_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 void ili9225_remove(struct spi_device *spi)
+{
+	struct drm_device *drm = spi_get_drvdata(spi);
+
+	drm_dev_unplug(drm);
+	drm_atomic_helper_shutdown(drm);
+}
+
+static void ili9225_shutdown(struct spi_device *spi)
+{
+	drm_atomic_helper_shutdown(spi_get_drvdata(spi));
+}
+
+static struct spi_driver ili9225_spi_driver = {
+	.driver = {
+		.name = "ili9225",
+		.owner = THIS_MODULE,
+		.of_match_table = ili9225_of_match,
+	},
+	.id_table = ili9225_id,
+	.probe = ili9225_probe,
+	.remove = ili9225_remove,
+	.shutdown = ili9225_shutdown,
+};
+module_spi_driver(ili9225_spi_driver);
+
+MODULE_DESCRIPTION("Ilitek ILI9225 DRM driver");
+MODULE_AUTHOR("David Lechner <david@lechnology.com>");
+MODULE_LICENSE("GPL");
-- 
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