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11#include <linux/backlight.h>
12#include <linux/delay.h>
13#include <linux/gpio/consumer.h>
14#include <linux/module.h>
15#include <linux/property.h>
16#include <linux/spi/spi.h>
17
18#include <drm/drm_atomic_helper.h>
19#include <drm/drm_drv.h>
20#include <drm/drm_fb_helper.h>
21#include <drm/drm_gem_atomic_helper.h>
22#include <drm/drm_gem_cma_helper.h>
23#include <drm/drm_managed.h>
24#include <drm/drm_mipi_dbi.h>
25#include <drm/drm_modeset_helper.h>
26#include <video/mipi_display.h>
27
28#define ILI9341_FRMCTR1 0xb1
29#define ILI9341_DISCTRL 0xb6
30#define ILI9341_ETMOD 0xb7
31
32#define ILI9341_PWCTRL1 0xc0
33#define ILI9341_PWCTRL2 0xc1
34#define ILI9341_VMCTRL1 0xc5
35#define ILI9341_VMCTRL2 0xc7
36#define ILI9341_PWCTRLA 0xcb
37#define ILI9341_PWCTRLB 0xcf
38
39#define ILI9341_PGAMCTRL 0xe0
40#define ILI9341_NGAMCTRL 0xe1
41#define ILI9341_DTCTRLA 0xe8
42#define ILI9341_DTCTRLB 0xea
43#define ILI9341_PWRSEQ 0xed
44
45#define ILI9341_EN3GAM 0xf2
46#define ILI9341_PUMPCTRL 0xf7
47
48#define ILI9341_MADCTL_BGR BIT(3)
49#define ILI9341_MADCTL_MV BIT(5)
50#define ILI9341_MADCTL_MX BIT(6)
51#define ILI9341_MADCTL_MY BIT(7)
52
53static void yx240qv29_enable(struct drm_simple_display_pipe *pipe,
54 struct drm_crtc_state *crtc_state,
55 struct drm_plane_state *plane_state)
56{
57 struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
58 struct mipi_dbi *dbi = &dbidev->dbi;
59 u8 addr_mode;
60 int ret, idx;
61
62 if (!drm_dev_enter(pipe->crtc.dev, &idx))
63 return;
64
65 DRM_DEBUG_KMS("\n");
66
67 ret = mipi_dbi_poweron_conditional_reset(dbidev);
68 if (ret < 0)
69 goto out_exit;
70 if (ret == 1)
71 goto out_enable;
72
73 mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF);
74
75 mipi_dbi_command(dbi, ILI9341_PWCTRLB, 0x00, 0xc1, 0x30);
76 mipi_dbi_command(dbi, ILI9341_PWRSEQ, 0x64, 0x03, 0x12, 0x81);
77 mipi_dbi_command(dbi, ILI9341_DTCTRLA, 0x85, 0x00, 0x78);
78 mipi_dbi_command(dbi, ILI9341_PWCTRLA, 0x39, 0x2c, 0x00, 0x34, 0x02);
79 mipi_dbi_command(dbi, ILI9341_PUMPCTRL, 0x20);
80 mipi_dbi_command(dbi, ILI9341_DTCTRLB, 0x00, 0x00);
81
82
83 mipi_dbi_command(dbi, ILI9341_PWCTRL1, 0x23);
84 mipi_dbi_command(dbi, ILI9341_PWCTRL2, 0x10);
85
86 mipi_dbi_command(dbi, ILI9341_VMCTRL1, 0x3e, 0x28);
87 mipi_dbi_command(dbi, ILI9341_VMCTRL2, 0x86);
88
89
90 mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT);
91
92
93 mipi_dbi_command(dbi, ILI9341_FRMCTR1, 0x00, 0x1b);
94
95
96 mipi_dbi_command(dbi, ILI9341_EN3GAM, 0x00);
97 mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, 0x01);
98 mipi_dbi_command(dbi, ILI9341_PGAMCTRL,
99 0x0f, 0x31, 0x2b, 0x0c, 0x0e, 0x08, 0x4e, 0xf1,
100 0x37, 0x07, 0x10, 0x03, 0x0e, 0x09, 0x00);
101 mipi_dbi_command(dbi, ILI9341_NGAMCTRL,
102 0x00, 0x0e, 0x14, 0x03, 0x11, 0x07, 0x31, 0xc1,
103 0x48, 0x08, 0x0f, 0x0c, 0x31, 0x36, 0x0f);
104
105
106 mipi_dbi_command(dbi, ILI9341_ETMOD, 0x07);
107
108
109 mipi_dbi_command(dbi, ILI9341_DISCTRL, 0x08, 0x82, 0x27, 0x00);
110 mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
111 msleep(100);
112
113 mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
114 msleep(100);
115
116out_enable:
117 switch (dbidev->rotation) {
118 default:
119 addr_mode = ILI9341_MADCTL_MX;
120 break;
121 case 90:
122 addr_mode = ILI9341_MADCTL_MV;
123 break;
124 case 180:
125 addr_mode = ILI9341_MADCTL_MY;
126 break;
127 case 270:
128 addr_mode = ILI9341_MADCTL_MV | ILI9341_MADCTL_MY |
129 ILI9341_MADCTL_MX;
130 break;
131 }
132 addr_mode |= ILI9341_MADCTL_BGR;
133 mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
134 mipi_dbi_enable_flush(dbidev, crtc_state, plane_state);
135out_exit:
136 drm_dev_exit(idx);
137}
138
139static const struct drm_simple_display_pipe_funcs ili9341_pipe_funcs = {
140 .enable = yx240qv29_enable,
141 .disable = mipi_dbi_pipe_disable,
142 .update = mipi_dbi_pipe_update,
143};
144
145static const struct drm_display_mode yx240qv29_mode = {
146 DRM_SIMPLE_MODE(240, 320, 37, 49),
147};
148
149DEFINE_DRM_GEM_CMA_FOPS(ili9341_fops);
150
151static const struct drm_driver ili9341_driver = {
152 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
153 .fops = &ili9341_fops,
154 DRM_GEM_CMA_DRIVER_OPS_VMAP,
155 .debugfs_init = mipi_dbi_debugfs_init,
156 .name = "ili9341",
157 .desc = "Ilitek ILI9341",
158 .date = "20180514",
159 .major = 1,
160 .minor = 0,
161};
162
163static const struct of_device_id ili9341_of_match[] = {
164 { .compatible = "adafruit,yx240qv29" },
165 { }
166};
167MODULE_DEVICE_TABLE(of, ili9341_of_match);
168
169static const struct spi_device_id ili9341_id[] = {
170 { "yx240qv29", 0 },
171 { }
172};
173MODULE_DEVICE_TABLE(spi, ili9341_id);
174
175static int ili9341_probe(struct spi_device *spi)
176{
177 struct device *dev = &spi->dev;
178 struct mipi_dbi_dev *dbidev;
179 struct drm_device *drm;
180 struct mipi_dbi *dbi;
181 struct gpio_desc *dc;
182 u32 rotation = 0;
183 int ret;
184
185 dbidev = devm_drm_dev_alloc(dev, &ili9341_driver,
186 struct mipi_dbi_dev, drm);
187 if (IS_ERR(dbidev))
188 return PTR_ERR(dbidev);
189
190 dbi = &dbidev->dbi;
191 drm = &dbidev->drm;
192
193 dbi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
194 if (IS_ERR(dbi->reset))
195 return dev_err_probe(dev, PTR_ERR(dbi->reset), "Failed to get GPIO 'reset'\n");
196
197 dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW);
198 if (IS_ERR(dc))
199 return dev_err_probe(dev, PTR_ERR(dc), "Failed to get GPIO 'dc'\n");
200
201 dbidev->backlight = devm_of_find_backlight(dev);
202 if (IS_ERR(dbidev->backlight))
203 return PTR_ERR(dbidev->backlight);
204
205 device_property_read_u32(dev, "rotation", &rotation);
206
207 ret = mipi_dbi_spi_init(spi, dbi, dc);
208 if (ret)
209 return ret;
210
211 ret = mipi_dbi_dev_init(dbidev, &ili9341_pipe_funcs, &yx240qv29_mode, rotation);
212 if (ret)
213 return ret;
214
215 drm_mode_config_reset(drm);
216
217 ret = drm_dev_register(drm, 0);
218 if (ret)
219 return ret;
220
221 spi_set_drvdata(spi, drm);
222
223 drm_fbdev_generic_setup(drm, 0);
224
225 return 0;
226}
227
228static int ili9341_remove(struct spi_device *spi)
229{
230 struct drm_device *drm = spi_get_drvdata(spi);
231
232 drm_dev_unplug(drm);
233 drm_atomic_helper_shutdown(drm);
234
235 return 0;
236}
237
238static void ili9341_shutdown(struct spi_device *spi)
239{
240 drm_atomic_helper_shutdown(spi_get_drvdata(spi));
241}
242
243static struct spi_driver ili9341_spi_driver = {
244 .driver = {
245 .name = "ili9341",
246 .of_match_table = ili9341_of_match,
247 },
248 .id_table = ili9341_id,
249 .probe = ili9341_probe,
250 .remove = ili9341_remove,
251 .shutdown = ili9341_shutdown,
252};
253module_spi_driver(ili9341_spi_driver);
254
255MODULE_DESCRIPTION("Ilitek ILI9341 DRM driver");
256MODULE_AUTHOR("David Lechner <david@lechnology.com>");
257MODULE_LICENSE("GPL");
258
