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_client_setup.h>
 12#include <drm/drm_drv.h>
 13#include <drm/drm_fbdev_dma.h>
 14#include <drm/drm_gem_atomic_helper.h>
 15#include <drm/drm_gem_dma_helper.h>
 16#include <drm/drm_mipi_dbi.h>
 17#include <drm/drm_modeset_helper.h>
 18
 19#include <video/mipi_display.h>
 20
 21#define ILI9163_FRMCTR1		0xb1
 22
 23#define ILI9163_PWCTRL1		0xc0
 24#define ILI9163_PWCTRL2		0xc1
 25#define ILI9163_VMCTRL1		0xc5
 26#define ILI9163_VMCTRL2		0xc7
 27#define ILI9163_PWCTRLA		0xcb
 28#define ILI9163_PWCTRLB		0xcf
 29
 30#define ILI9163_EN3GAM		0xf2
 31
 32#define ILI9163_MADCTL_BGR	BIT(3)
 33#define ILI9163_MADCTL_MV	BIT(5)
 34#define ILI9163_MADCTL_MX	BIT(6)
 35#define ILI9163_MADCTL_MY	BIT(7)
 36
 37static void yx240qv29_enable(struct drm_simple_display_pipe *pipe,
 38			     struct drm_crtc_state *crtc_state,
 39			     struct drm_plane_state *plane_state)
 40{
 41	struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
 42	struct mipi_dbi *dbi = &dbidev->dbi;
 43	u8 addr_mode;
 44	int ret, idx;
 45
 46	if (!drm_dev_enter(pipe->crtc.dev, &idx))
 47		return;
 48
 49	DRM_DEBUG_KMS("\n");
 50
 51	ret = mipi_dbi_poweron_conditional_reset(dbidev);
 52	if (ret < 0)
 53		goto out_exit;
 54	if (ret == 1)
 55		goto out_enable;
 56
 57	/* Gamma */
 58	mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, 0x04);
 59	mipi_dbi_command(dbi, ILI9163_EN3GAM, 0x00);
 60
 61	/* Frame Rate */
 62	mipi_dbi_command(dbi, ILI9163_FRMCTR1, 0x0a, 0x14);
 63
 64	/* Power Control */
 65	mipi_dbi_command(dbi, ILI9163_PWCTRL1, 0x0a, 0x00);
 66	mipi_dbi_command(dbi, ILI9163_PWCTRL2, 0x02);
 67
 68	/* VCOM */
 69	mipi_dbi_command(dbi, ILI9163_VMCTRL1, 0x2f, 0x3e);
 70	mipi_dbi_command(dbi, ILI9163_VMCTRL2, 0x40);
 71
 72	/* Memory Access Control */
 73	mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT);
 74
 75	mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
 76	msleep(100);
 77
 78	mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
 79	msleep(100);
 80
 81out_enable:
 82	switch (dbidev->rotation) {
 83	default:
 84		addr_mode = ILI9163_MADCTL_MX | ILI9163_MADCTL_MY;
 85		break;
 86	case 90:
 87		addr_mode = ILI9163_MADCTL_MX | ILI9163_MADCTL_MV;
 88		break;
 89	case 180:
 90		addr_mode = 0;
 91		break;
 92	case 270:
 93		addr_mode = ILI9163_MADCTL_MY | ILI9163_MADCTL_MV;
 94		break;
 95	}
 96	addr_mode |= ILI9163_MADCTL_BGR;
 97	mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
 98	mipi_dbi_enable_flush(dbidev, crtc_state, plane_state);
 99out_exit:
100	drm_dev_exit(idx);
101}
102
103static const struct drm_simple_display_pipe_funcs ili9163_pipe_funcs = {
104	DRM_MIPI_DBI_SIMPLE_DISPLAY_PIPE_FUNCS(yx240qv29_enable),
105};
106
107static const struct drm_display_mode yx240qv29_mode = {
108	DRM_SIMPLE_MODE(128, 160, 28, 35),
109};
110
111DEFINE_DRM_GEM_DMA_FOPS(ili9163_fops);
112
113static struct drm_driver ili9163_driver = {
114	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
115	.fops			= &ili9163_fops,
116	DRM_GEM_DMA_DRIVER_OPS_VMAP,
117	DRM_FBDEV_DMA_DRIVER_OPS,
118	.debugfs_init		= mipi_dbi_debugfs_init,
119	.name			= "ili9163",
120	.desc			= "Ilitek ILI9163",
121	.date			= "20210208",
122	.major			= 1,
123	.minor			= 0,
124};
125
126static const struct of_device_id ili9163_of_match[] = {
127	{ .compatible = "newhaven,1.8-128160EF" },
128	{ }
129};
130MODULE_DEVICE_TABLE(of, ili9163_of_match);
131
132static const struct spi_device_id ili9163_id[] = {
133	{ "nhd-1.8-128160EF", 0 },
134	{ }
135};
136MODULE_DEVICE_TABLE(spi, ili9163_id);
137
138static int ili9163_probe(struct spi_device *spi)
139{
140	struct device *dev = &spi->dev;
141	struct mipi_dbi_dev *dbidev;
142	struct drm_device *drm;
143	struct mipi_dbi *dbi;
144	struct gpio_desc *dc;
145	u32 rotation = 0;
146	int ret;
147
148	dbidev = devm_drm_dev_alloc(dev, &ili9163_driver,
149				    struct mipi_dbi_dev, drm);
150	if (IS_ERR(dbidev))
151		return PTR_ERR(dbidev);
152
153	dbi = &dbidev->dbi;
154	drm = &dbidev->drm;
155
156	spi_set_drvdata(spi, drm);
157
158	dbi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
159	if (IS_ERR(dbi->reset)) {
160		DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
161		return PTR_ERR(dbi->reset);
162	}
163
164	dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW);
165	if (IS_ERR(dc)) {
166		DRM_DEV_ERROR(dev, "Failed to get gpio 'dc'\n");
167		return PTR_ERR(dc);
168	}
169
170	dbidev->backlight = devm_of_find_backlight(dev);
171	if (IS_ERR(dbidev->backlight))
172		return PTR_ERR(dbidev->backlight);
173
174	device_property_read_u32(dev, "rotation", &rotation);
175
176	ret = mipi_dbi_spi_init(spi, dbi, dc);
177	if (ret)
178		return ret;
179
180	ret = mipi_dbi_dev_init(dbidev, &ili9163_pipe_funcs, &yx240qv29_mode, rotation);
181	if (ret)
182		return ret;
183
184	drm_mode_config_reset(drm);
185
186	ret = drm_dev_register(drm, 0);
187	if (ret)
188		return ret;
189
190	drm_client_setup(drm, NULL);
191
192	return 0;
193}
194
195static void ili9163_remove(struct spi_device *spi)
196{
197	struct drm_device *drm = spi_get_drvdata(spi);
198
199	drm_dev_unplug(drm);
200	drm_atomic_helper_shutdown(drm);
201}
202
203static void ili9163_shutdown(struct spi_device *spi)
204{
205	drm_atomic_helper_shutdown(spi_get_drvdata(spi));
206}
207
208static struct spi_driver ili9163_spi_driver = {
209	.driver = {
210		.name = "ili9163",
211		.of_match_table = ili9163_of_match,
212	},
213	.id_table = ili9163_id,
214	.probe = ili9163_probe,
215	.remove = ili9163_remove,
216	.shutdown = ili9163_shutdown,
217};
218module_spi_driver(ili9163_spi_driver);
219
220MODULE_DESCRIPTION("Ilitek ILI9163 DRM driver");
221MODULE_AUTHOR("Daniel Mack <daniel@zonque.org>");
222MODULE_LICENSE("GPL");