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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_cma_helper.h>
22#include <drm/drm_gem_framebuffer_helper.h>
23#include <drm/drm_modeset_helper.h>
24#include <drm/tinydrm/mipi-dbi.h>
25#include <drm/tinydrm/tinydrm-helpers.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 *mipi = drm_to_mipi_dbi(pipe->crtc.dev);
58 u8 addr_mode;
59 int ret, idx;
60
61 if (!drm_dev_enter(pipe->crtc.dev, &idx))
62 return;
63
64 DRM_DEBUG_KMS("\n");
65
66 ret = mipi_dbi_poweron_conditional_reset(mipi);
67 if (ret < 0)
68 goto out_exit;
69 if (ret == 1)
70 goto out_enable;
71
72 mipi_dbi_command(mipi, MIPI_DCS_SET_DISPLAY_OFF);
73
74 mipi_dbi_command(mipi, ILI9341_PWCTRLB, 0x00, 0xc1, 0x30);
75 mipi_dbi_command(mipi, ILI9341_PWRSEQ, 0x64, 0x03, 0x12, 0x81);
76 mipi_dbi_command(mipi, ILI9341_DTCTRLA, 0x85, 0x00, 0x78);
77 mipi_dbi_command(mipi, ILI9341_PWCTRLA, 0x39, 0x2c, 0x00, 0x34, 0x02);
78 mipi_dbi_command(mipi, ILI9341_PUMPCTRL, 0x20);
79 mipi_dbi_command(mipi, ILI9341_DTCTRLB, 0x00, 0x00);
80
81
82 mipi_dbi_command(mipi, ILI9341_PWCTRL1, 0x23);
83 mipi_dbi_command(mipi, ILI9341_PWCTRL2, 0x10);
84
85 mipi_dbi_command(mipi, ILI9341_VMCTRL1, 0x3e, 0x28);
86 mipi_dbi_command(mipi, ILI9341_VMCTRL2, 0x86);
87
88
89 mipi_dbi_command(mipi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT);
90
91
92 mipi_dbi_command(mipi, ILI9341_FRMCTR1, 0x00, 0x1b);
93
94
95 mipi_dbi_command(mipi, ILI9341_EN3GAM, 0x00);
96 mipi_dbi_command(mipi, MIPI_DCS_SET_GAMMA_CURVE, 0x01);
97 mipi_dbi_command(mipi, ILI9341_PGAMCTRL,
98 0x0f, 0x31, 0x2b, 0x0c, 0x0e, 0x08, 0x4e, 0xf1,
99 0x37, 0x07, 0x10, 0x03, 0x0e, 0x09, 0x00);
100 mipi_dbi_command(mipi, ILI9341_NGAMCTRL,
101 0x00, 0x0e, 0x14, 0x03, 0x11, 0x07, 0x31, 0xc1,
102 0x48, 0x08, 0x0f, 0x0c, 0x31, 0x36, 0x0f);
103
104
105 mipi_dbi_command(mipi, ILI9341_ETMOD, 0x07);
106
107
108 mipi_dbi_command(mipi, ILI9341_DISCTRL, 0x08, 0x82, 0x27, 0x00);
109 mipi_dbi_command(mipi, MIPI_DCS_EXIT_SLEEP_MODE);
110 msleep(100);
111
112 mipi_dbi_command(mipi, MIPI_DCS_SET_DISPLAY_ON);
113 msleep(100);
114
115out_enable:
116 switch (mipi->rotation) {
117 default:
118 addr_mode = ILI9341_MADCTL_MX;
119 break;
120 case 90:
121 addr_mode = ILI9341_MADCTL_MV;
122 break;
123 case 180:
124 addr_mode = ILI9341_MADCTL_MY;
125 break;
126 case 270:
127 addr_mode = ILI9341_MADCTL_MV | ILI9341_MADCTL_MY |
128 ILI9341_MADCTL_MX;
129 break;
130 }
131 addr_mode |= ILI9341_MADCTL_BGR;
132 mipi_dbi_command(mipi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
133 mipi_dbi_enable_flush(mipi, crtc_state, plane_state);
134out_exit:
135 drm_dev_exit(idx);
136}
137
138static const struct drm_simple_display_pipe_funcs ili9341_pipe_funcs = {
139 .enable = yx240qv29_enable,
140 .disable = mipi_dbi_pipe_disable,
141 .update = mipi_dbi_pipe_update,
142 .prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
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 struct drm_driver ili9341_driver = {
152 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME | DRIVER_ATOMIC,
153 .fops = &ili9341_fops,
154 .release = mipi_dbi_release,
155 DRM_GEM_CMA_VMAP_DRIVER_OPS,
156 .debugfs_init = mipi_dbi_debugfs_init,
157 .name = "ili9341",
158 .desc = "Ilitek ILI9341",
159 .date = "20180514",
160 .major = 1,
161 .minor = 0,
162};
163
164static const struct of_device_id ili9341_of_match[] = {
165 { .compatible = "adafruit,yx240qv29" },
166 { }
167};
168MODULE_DEVICE_TABLE(of, ili9341_of_match);
169
170static const struct spi_device_id ili9341_id[] = {
171 { "yx240qv29", 0 },
172 { }
173};
174MODULE_DEVICE_TABLE(spi, ili9341_id);
175
176static int ili9341_probe(struct spi_device *spi)
177{
178 struct device *dev = &spi->dev;
179 struct drm_device *drm;
180 struct mipi_dbi *mipi;
181 struct gpio_desc *dc;
182 u32 rotation = 0;
183 int ret;
184
185 mipi = kzalloc(sizeof(*mipi), GFP_KERNEL);
186 if (!mipi)
187 return -ENOMEM;
188
189 drm = &mipi->drm;
190 ret = devm_drm_dev_init(dev, drm, &ili9341_driver);
191 if (ret) {
192 kfree(mipi);
193 return ret;
194 }
195
196 drm_mode_config_init(drm);
197
198 mipi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
199 if (IS_ERR(mipi->reset)) {
200 DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
201 return PTR_ERR(mipi->reset);
202 }
203
204 dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW);
205 if (IS_ERR(dc)) {
206 DRM_DEV_ERROR(dev, "Failed to get gpio 'dc'\n");
207 return PTR_ERR(dc);
208 }
209
210 mipi->backlight = devm_of_find_backlight(dev);
211 if (IS_ERR(mipi->backlight))
212 return PTR_ERR(mipi->backlight);
213
214 device_property_read_u32(dev, "rotation", &rotation);
215
216 ret = mipi_dbi_spi_init(spi, mipi, dc);
217 if (ret)
218 return ret;
219
220 ret = mipi_dbi_init(mipi, &ili9341_pipe_funcs, &yx240qv29_mode, rotation);
221 if (ret)
222 return ret;
223
224 drm_mode_config_reset(drm);
225
226 ret = drm_dev_register(drm, 0);
227 if (ret)
228 return ret;
229
230 spi_set_drvdata(spi, drm);
231
232 drm_fbdev_generic_setup(drm, 0);
233
234 return 0;
235}
236
237static int ili9341_remove(struct spi_device *spi)
238{
239 struct drm_device *drm = spi_get_drvdata(spi);
240
241 drm_dev_unplug(drm);
242 drm_atomic_helper_shutdown(drm);
243
244 return 0;
245}
246
247static void ili9341_shutdown(struct spi_device *spi)
248{
249 drm_atomic_helper_shutdown(spi_get_drvdata(spi));
250}
251
252static struct spi_driver ili9341_spi_driver = {
253 .driver = {
254 .name = "ili9341",
255 .of_match_table = ili9341_of_match,
256 },
257 .id_table = ili9341_id,
258 .probe = ili9341_probe,
259 .remove = ili9341_remove,
260 .shutdown = ili9341_shutdown,
261};
262module_spi_driver(ili9341_spi_driver);
263
264MODULE_DESCRIPTION("Ilitek ILI9341 DRM driver");
265MODULE_AUTHOR("David Lechner <david@lechnology.com>");
266MODULE_LICENSE("GPL");
267
