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_generic.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 | |
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(drm: pipe->crtc.dev); |
41 | struct mipi_dbi *dbi = &dbidev->dbi; |
42 | u8 addr_mode; |
43 | int ret, idx; |
44 | |
45 | if (!drm_dev_enter(dev: pipe->crtc.dev, idx: &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(msecs: 100); |
76 | |
77 | mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON); |
78 | msleep(msecs: 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, plan_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 | |
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(ptr: dbidev)) |
149 | return PTR_ERR(ptr: dbidev); |
150 | |
151 | dbi = &dbidev->dbi; |
152 | drm = &dbidev->drm; |
153 | |
154 | spi_set_drvdata(spi, data: drm); |
155 | |
156 | dbi->reset = devm_gpiod_get_optional(dev, con_id: "reset" , flags: GPIOD_OUT_HIGH); |
157 | if (IS_ERR(ptr: dbi->reset)) { |
158 | DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n" ); |
159 | return PTR_ERR(ptr: dbi->reset); |
160 | } |
161 | |
162 | dc = devm_gpiod_get_optional(dev, con_id: "dc" , flags: GPIOD_OUT_LOW); |
163 | if (IS_ERR(ptr: dc)) { |
164 | DRM_DEV_ERROR(dev, "Failed to get gpio 'dc'\n" ); |
165 | return PTR_ERR(ptr: dc); |
166 | } |
167 | |
168 | dbidev->backlight = devm_of_find_backlight(dev); |
169 | if (IS_ERR(ptr: dbidev->backlight)) |
170 | return PTR_ERR(ptr: dbidev->backlight); |
171 | |
172 | device_property_read_u32(dev, propname: "rotation" , val: &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, funcs: &ili9163_pipe_funcs, mode: &yx240qv29_mode, rotation); |
179 | if (ret) |
180 | return ret; |
181 | |
182 | drm_mode_config_reset(dev: drm); |
183 | |
184 | ret = drm_dev_register(dev: drm, flags: 0); |
185 | if (ret) |
186 | return ret; |
187 | |
188 | drm_fbdev_generic_setup(dev: drm, preferred_bpp: 0); |
189 | |
190 | return 0; |
191 | } |
192 | |
193 | static void ili9163_remove(struct spi_device *spi) |
194 | { |
195 | struct drm_device *drm = spi_get_drvdata(spi); |
196 | |
197 | drm_dev_unplug(dev: drm); |
198 | drm_atomic_helper_shutdown(dev: drm); |
199 | } |
200 | |
201 | static void ili9163_shutdown(struct spi_device *spi) |
202 | { |
203 | drm_atomic_helper_shutdown(dev: 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 | |