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_dma.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
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 DRM_MIPI_DBI_SIMPLE_DISPLAY_PIPE_FUNCS(yx240qv29_enable),
104 };
105
106 static const struct drm_display_mode yx240qv29_mode = {
107 DRM_SIMPLE_MODE(128, 160, 28, 35),
108 };
109
110 DEFINE_DRM_GEM_DMA_FOPS(ili9163_fops);
111
112 static 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
124 static const struct of_device_id ili9163_of_match[] = {
125 { .compatible = "newhaven,1.8-128160EF" },
126 { }
127 };
128 MODULE_DEVICE_TABLE(of, ili9163_of_match);
129
130 static const struct spi_device_id ili9163_id[] = {
131 { "nhd-1.8-128160EF", 0 },
132 { }
133 };
134 MODULE_DEVICE_TABLE(spi, ili9163_id);
135
ili9163_probe(struct spi_device * spi)136 static 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_dma_setup(drm, 0);
189
190 return 0;
191 }
192
ili9163_remove(struct spi_device * spi)193 static 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
ili9163_shutdown(struct spi_device * spi)201 static void ili9163_shutdown(struct spi_device *spi)
202 {
203 drm_atomic_helper_shutdown(spi_get_drvdata(spi));
204 }
205
206 static 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 };
216 module_spi_driver(ili9163_spi_driver);
217
218 MODULE_DESCRIPTION("Ilitek ILI9163 DRM driver");
219 MODULE_AUTHOR("Daniel Mack <daniel@zonque.org>");
220 MODULE_LICENSE("GPL");
221