1// SPDX-License-Identifier: GPL-2.0+
  2
  3#include <linux/backlight.h>
  4#include <linux/delay.h>
  5#include <linux/gpio/consumer.h>
  6#include <linux/module.h>
  7#include <linux/property.h>
  8#include <linux/spi/spi.h>
  9
 10#include <drm/drm_atomic_helper.h>
 11#include <drm/drm_drv.h>
 12#include <drm/drm_fbdev_generic.h>
 13#include <drm/drm_gem_atomic_helper.h>
 14#include <drm/drm_gem_dma_helper.h>
 15#include <drm/drm_mipi_dbi.h>
 16#include <drm/drm_modeset_helper.h>
 17
 18#include <video/mipi_display.h>
 19
 20#define ILI9163_FRMCTR1		0xb1
 21
 22#define ILI9163_PWCTRL1		0xc0
 23#define ILI9163_PWCTRL2		0xc1
 24#define ILI9163_VMCTRL1		0xc5
 25#define ILI9163_VMCTRL2		0xc7
 26#define ILI9163_PWCTRLA		0xcb
 27#define ILI9163_PWCTRLB		0xcf
 28
 29#define ILI9163_EN3GAM		0xf2
 30
 31#define ILI9163_MADCTL_BGR	BIT(3)
 32#define ILI9163_MADCTL_MV	BIT(5)
 33#define ILI9163_MADCTL_MX	BIT(6)
 34#define ILI9163_MADCTL_MY	BIT(7)
 35
 36static void yx240qv29_enable(struct drm_simple_display_pipe *pipe,
 37			     struct drm_crtc_state *crtc_state,
 38			     struct drm_plane_state *plane_state)
 39{
 40	struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
 41	struct mipi_dbi *dbi = &dbidev->dbi;
 42	u8 addr_mode;
 43	int ret, idx;
 44
 45	if (!drm_dev_enter(pipe->crtc.dev, &idx))
 46		return;
 47
 48	DRM_DEBUG_KMS("\n");
 49
 50	ret = mipi_dbi_poweron_conditional_reset(dbidev);
 51	if (ret < 0)
 52		goto out_exit;
 53	if (ret == 1)
 54		goto out_enable;
 55
 56	/* Gamma */
 57	mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, 0x04);
 58	mipi_dbi_command(dbi, ILI9163_EN3GAM, 0x00);
 59
 60	/* Frame Rate */
 61	mipi_dbi_command(dbi, ILI9163_FRMCTR1, 0x0a, 0x14);
 62
 63	/* Power Control */
 64	mipi_dbi_command(dbi, ILI9163_PWCTRL1, 0x0a, 0x00);
 65	mipi_dbi_command(dbi, ILI9163_PWCTRL2, 0x02);
 66
 67	/* VCOM */
 68	mipi_dbi_command(dbi, ILI9163_VMCTRL1, 0x2f, 0x3e);
 69	mipi_dbi_command(dbi, ILI9163_VMCTRL2, 0x40);
 70
 71	/* Memory Access Control */
 72	mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT);
 73
 74	mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
 75	msleep(100);
 76
 77	mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
 78	msleep(100);
 79
 80out_enable:
 81	switch (dbidev->rotation) {
 82	default:
 83		addr_mode = ILI9163_MADCTL_MX | ILI9163_MADCTL_MY;
 84		break;
 85	case 90:
 86		addr_mode = ILI9163_MADCTL_MX | ILI9163_MADCTL_MV;
 87		break;
 88	case 180:
 89		addr_mode = 0;
 90		break;
 91	case 270:
 92		addr_mode = ILI9163_MADCTL_MY | ILI9163_MADCTL_MV;
 93		break;
 94	}
 95	addr_mode |= ILI9163_MADCTL_BGR;
 96	mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
 97	mipi_dbi_enable_flush(dbidev, crtc_state, plane_state);
 98out_exit:
 99	drm_dev_exit(idx);
100}
101
102static const struct drm_simple_display_pipe_funcs ili9163_pipe_funcs = {
103	DRM_MIPI_DBI_SIMPLE_DISPLAY_PIPE_FUNCS(yx240qv29_enable),
104};
105
106static const struct drm_display_mode yx240qv29_mode = {
107	DRM_SIMPLE_MODE(128, 160, 28, 35),
108};
109
110DEFINE_DRM_GEM_DMA_FOPS(ili9163_fops);
111
112static struct drm_driver ili9163_driver = {
113	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
114	.fops			= &ili9163_fops,
115	DRM_GEM_DMA_DRIVER_OPS_VMAP,
116	.debugfs_init		= mipi_dbi_debugfs_init,
117	.name			= "ili9163",
118	.desc			= "Ilitek ILI9163",
119	.date			= "20210208",
120	.major			= 1,
121	.minor			= 0,
122};
123
124static const struct of_device_id ili9163_of_match[] = {
125	{ .compatible = "newhaven,1.8-128160EF" },
126	{ }
127};
128MODULE_DEVICE_TABLE(of, ili9163_of_match);
129
130static const struct spi_device_id ili9163_id[] = {
131	{ "nhd-1.8-128160EF", 0 },
132	{ }
133};
134MODULE_DEVICE_TABLE(spi, ili9163_id);
135
136static int ili9163_probe(struct spi_device *spi)
137{
138	struct device *dev = &spi->dev;
139	struct mipi_dbi_dev *dbidev;
140	struct drm_device *drm;
141	struct mipi_dbi *dbi;
142	struct gpio_desc *dc;
143	u32 rotation = 0;
144	int ret;
145
146	dbidev = devm_drm_dev_alloc(dev, &ili9163_driver,
147				    struct mipi_dbi_dev, drm);
148	if (IS_ERR(dbidev))
149		return PTR_ERR(dbidev);
150
151	dbi = &dbidev->dbi;
152	drm = &dbidev->drm;
153
154	spi_set_drvdata(spi, drm);
155
156	dbi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
157	if (IS_ERR(dbi->reset)) {
158		DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
159		return PTR_ERR(dbi->reset);
160	}
161
162	dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW);
163	if (IS_ERR(dc)) {
164		DRM_DEV_ERROR(dev, "Failed to get gpio 'dc'\n");
165		return PTR_ERR(dc);
166	}
167
168	dbidev->backlight = devm_of_find_backlight(dev);
169	if (IS_ERR(dbidev->backlight))
170		return PTR_ERR(dbidev->backlight);
171
172	device_property_read_u32(dev, "rotation", &rotation);
173
174	ret = mipi_dbi_spi_init(spi, dbi, dc);
175	if (ret)
176		return ret;
177
178	ret = mipi_dbi_dev_init(dbidev, &ili9163_pipe_funcs, &yx240qv29_mode, rotation);
179	if (ret)
180		return ret;
181
182	drm_mode_config_reset(drm);
183
184	ret = drm_dev_register(drm, 0);
185	if (ret)
186		return ret;
187
188	drm_fbdev_generic_setup(drm, 0);
189
190	return 0;
191}
192
193static void ili9163_remove(struct spi_device *spi)
194{
195	struct drm_device *drm = spi_get_drvdata(spi);
196
197	drm_dev_unplug(drm);
198	drm_atomic_helper_shutdown(drm);
199}
200
201static void ili9163_shutdown(struct spi_device *spi)
202{
203	drm_atomic_helper_shutdown(spi_get_drvdata(spi));
204}
205
206static struct spi_driver ili9163_spi_driver = {
207	.driver = {
208		.name = "ili9163",
209		.of_match_table = ili9163_of_match,
210	},
211	.id_table = ili9163_id,
212	.probe = ili9163_probe,
213	.remove = ili9163_remove,
214	.shutdown = ili9163_shutdown,
215};
216module_spi_driver(ili9163_spi_driver);
217
218MODULE_DESCRIPTION("Ilitek ILI9163 DRM driver");
219MODULE_AUTHOR("Daniel Mack <daniel@zonque.org>");
220MODULE_LICENSE("GPL");