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_fb_helper.h>
13 #include <drm/drm_gem_atomic_helper.h>
14 #include <drm/drm_gem_cma_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
yx240qv29_enable(struct drm_simple_display_pipe * pipe,struct drm_crtc_state * crtc_state,struct drm_plane_state * plane_state)36 static 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
80 out_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);
98 out_exit:
99 drm_dev_exit(idx);
100 }
101
102 static const struct drm_simple_display_pipe_funcs ili9163_pipe_funcs = {
103 .enable = yx240qv29_enable,
104 .disable = mipi_dbi_pipe_disable,
105 .update = mipi_dbi_pipe_update,
106 .prepare_fb = drm_gem_simple_display_pipe_prepare_fb,
107 };
108
109 static const struct drm_display_mode yx240qv29_mode = {
110 DRM_SIMPLE_MODE(128, 160, 28, 35),
111 };
112
113 DEFINE_DRM_GEM_CMA_FOPS(ili9163_fops);
114
115 static struct drm_driver ili9163_driver = {
116 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
117 .fops = &ili9163_fops,
118 DRM_GEM_CMA_DRIVER_OPS_VMAP,
119 .debugfs_init = mipi_dbi_debugfs_init,
120 .name = "ili9163",
121 .desc = "Ilitek ILI9163",
122 .date = "20210208",
123 .major = 1,
124 .minor = 0,
125 };
126
127 static const struct of_device_id ili9163_of_match[] = {
128 { .compatible = "newhaven,1.8-128160EF" },
129 { }
130 };
131 MODULE_DEVICE_TABLE(of, ili9163_of_match);
132
133 static const struct spi_device_id ili9163_id[] = {
134 { "nhd-1.8-128160EF", 0 },
135 { }
136 };
137 MODULE_DEVICE_TABLE(spi, ili9163_id);
138
ili9163_probe(struct spi_device * spi)139 static int ili9163_probe(struct spi_device *spi)
140 {
141 struct device *dev = &spi->dev;
142 struct mipi_dbi_dev *dbidev;
143 struct drm_device *drm;
144 struct mipi_dbi *dbi;
145 struct gpio_desc *dc;
146 u32 rotation = 0;
147 int ret;
148
149 dbidev = devm_drm_dev_alloc(dev, &ili9163_driver,
150 struct mipi_dbi_dev, drm);
151 if (IS_ERR(dbidev))
152 return PTR_ERR(dbidev);
153
154 dbi = &dbidev->dbi;
155 drm = &dbidev->drm;
156
157 spi_set_drvdata(spi, drm);
158
159 dbi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
160 if (IS_ERR(dbi->reset)) {
161 DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
162 return PTR_ERR(dbi->reset);
163 }
164
165 dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW);
166 if (IS_ERR(dc)) {
167 DRM_DEV_ERROR(dev, "Failed to get gpio 'dc'\n");
168 return PTR_ERR(dc);
169 }
170
171 dbidev->backlight = devm_of_find_backlight(dev);
172 if (IS_ERR(dbidev->backlight))
173 return PTR_ERR(dbidev->backlight);
174
175 device_property_read_u32(dev, "rotation", &rotation);
176
177 ret = mipi_dbi_spi_init(spi, dbi, dc);
178 if (ret)
179 return ret;
180
181 ret = mipi_dbi_dev_init(dbidev, &ili9163_pipe_funcs, &yx240qv29_mode, rotation);
182 if (ret)
183 return ret;
184
185 drm_mode_config_reset(drm);
186
187 ret = drm_dev_register(drm, 0);
188 if (ret)
189 return ret;
190
191 drm_fbdev_generic_setup(drm, 0);
192
193 return 0;
194 }
195
ili9163_remove(struct spi_device * spi)196 static void ili9163_remove(struct spi_device *spi)
197 {
198 struct drm_device *drm = spi_get_drvdata(spi);
199
200 drm_dev_unplug(drm);
201 drm_atomic_helper_shutdown(drm);
202 }
203
ili9163_shutdown(struct spi_device * spi)204 static void ili9163_shutdown(struct spi_device *spi)
205 {
206 drm_atomic_helper_shutdown(spi_get_drvdata(spi));
207 }
208
209 static struct spi_driver ili9163_spi_driver = {
210 .driver = {
211 .name = "ili9163",
212 .of_match_table = ili9163_of_match,
213 },
214 .id_table = ili9163_id,
215 .probe = ili9163_probe,
216 .remove = ili9163_remove,
217 .shutdown = ili9163_shutdown,
218 };
219 module_spi_driver(ili9163_spi_driver);
220
221 MODULE_DESCRIPTION("Ilitek ILI9163 DRM driver");
222 MODULE_AUTHOR("Daniel Mack <daniel@zonque.org>");
223 MODULE_LICENSE("GPL");
224