1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | /* |
3 | * DRM driver for Ilitek ILI9341 panels |
4 | * |
5 | * Copyright 2018 David Lechner <david@lechnology.com> |
6 | * |
7 | * Based on mi0283qt.c: |
8 | * Copyright 2016 Noralf Trønnes |
9 | */ |
10 | |
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_fbdev_generic.h> |
21 | #include <drm/drm_gem_atomic_helper.h> |
22 | #include <drm/drm_gem_dma_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 | |
53 | static 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(drm: pipe->crtc.dev); |
58 | struct mipi_dbi *dbi = &dbidev->dbi; |
59 | u8 addr_mode; |
60 | int ret, idx; |
61 | |
62 | if (!drm_dev_enter(dev: pipe->crtc.dev, idx: &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 | /* Power Control */ |
83 | mipi_dbi_command(dbi, ILI9341_PWCTRL1, 0x23); |
84 | mipi_dbi_command(dbi, ILI9341_PWCTRL2, 0x10); |
85 | /* VCOM */ |
86 | mipi_dbi_command(dbi, ILI9341_VMCTRL1, 0x3e, 0x28); |
87 | mipi_dbi_command(dbi, ILI9341_VMCTRL2, 0x86); |
88 | |
89 | /* Memory Access Control */ |
90 | mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT); |
91 | |
92 | /* Frame Rate */ |
93 | mipi_dbi_command(dbi, ILI9341_FRMCTR1, 0x00, 0x1b); |
94 | |
95 | /* Gamma */ |
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 | /* DDRAM */ |
106 | mipi_dbi_command(dbi, ILI9341_ETMOD, 0x07); |
107 | |
108 | /* Display */ |
109 | mipi_dbi_command(dbi, ILI9341_DISCTRL, 0x08, 0x82, 0x27, 0x00); |
110 | mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE); |
111 | msleep(msecs: 100); |
112 | |
113 | mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON); |
114 | msleep(msecs: 100); |
115 | |
116 | out_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, plan_state: plane_state); |
135 | out_exit: |
136 | drm_dev_exit(idx); |
137 | } |
138 | |
139 | static const struct drm_simple_display_pipe_funcs ili9341_pipe_funcs = { |
140 | DRM_MIPI_DBI_SIMPLE_DISPLAY_PIPE_FUNCS(yx240qv29_enable), |
141 | }; |
142 | |
143 | static const struct drm_display_mode yx240qv29_mode = { |
144 | DRM_SIMPLE_MODE(240, 320, 37, 49), |
145 | }; |
146 | |
147 | DEFINE_DRM_GEM_DMA_FOPS(ili9341_fops); |
148 | |
149 | static const struct drm_driver ili9341_driver = { |
150 | .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, |
151 | .fops = &ili9341_fops, |
152 | DRM_GEM_DMA_DRIVER_OPS_VMAP, |
153 | .debugfs_init = mipi_dbi_debugfs_init, |
154 | .name = "ili9341" , |
155 | .desc = "Ilitek ILI9341" , |
156 | .date = "20180514" , |
157 | .major = 1, |
158 | .minor = 0, |
159 | }; |
160 | |
161 | static const struct of_device_id ili9341_of_match[] = { |
162 | { .compatible = "adafruit,yx240qv29" }, |
163 | { } |
164 | }; |
165 | MODULE_DEVICE_TABLE(of, ili9341_of_match); |
166 | |
167 | static const struct spi_device_id ili9341_id[] = { |
168 | { "yx240qv29" , 0 }, |
169 | { } |
170 | }; |
171 | MODULE_DEVICE_TABLE(spi, ili9341_id); |
172 | |
173 | static int ili9341_probe(struct spi_device *spi) |
174 | { |
175 | struct device *dev = &spi->dev; |
176 | struct mipi_dbi_dev *dbidev; |
177 | struct drm_device *drm; |
178 | struct mipi_dbi *dbi; |
179 | struct gpio_desc *dc; |
180 | u32 rotation = 0; |
181 | int ret; |
182 | |
183 | dbidev = devm_drm_dev_alloc(dev, &ili9341_driver, |
184 | struct mipi_dbi_dev, drm); |
185 | if (IS_ERR(ptr: dbidev)) |
186 | return PTR_ERR(ptr: dbidev); |
187 | |
188 | dbi = &dbidev->dbi; |
189 | drm = &dbidev->drm; |
190 | |
191 | dbi->reset = devm_gpiod_get_optional(dev, con_id: "reset" , flags: GPIOD_OUT_HIGH); |
192 | if (IS_ERR(ptr: dbi->reset)) |
193 | return dev_err_probe(dev, err: PTR_ERR(ptr: dbi->reset), fmt: "Failed to get GPIO 'reset'\n" ); |
194 | |
195 | dc = devm_gpiod_get_optional(dev, con_id: "dc" , flags: GPIOD_OUT_LOW); |
196 | if (IS_ERR(ptr: dc)) |
197 | return dev_err_probe(dev, err: PTR_ERR(ptr: dc), fmt: "Failed to get GPIO 'dc'\n" ); |
198 | |
199 | dbidev->backlight = devm_of_find_backlight(dev); |
200 | if (IS_ERR(ptr: dbidev->backlight)) |
201 | return PTR_ERR(ptr: dbidev->backlight); |
202 | |
203 | device_property_read_u32(dev, propname: "rotation" , val: &rotation); |
204 | |
205 | ret = mipi_dbi_spi_init(spi, dbi, dc); |
206 | if (ret) |
207 | return ret; |
208 | |
209 | ret = mipi_dbi_dev_init(dbidev, funcs: &ili9341_pipe_funcs, mode: &yx240qv29_mode, rotation); |
210 | if (ret) |
211 | return ret; |
212 | |
213 | drm_mode_config_reset(dev: drm); |
214 | |
215 | ret = drm_dev_register(dev: drm, flags: 0); |
216 | if (ret) |
217 | return ret; |
218 | |
219 | spi_set_drvdata(spi, data: drm); |
220 | |
221 | drm_fbdev_generic_setup(dev: drm, preferred_bpp: 0); |
222 | |
223 | return 0; |
224 | } |
225 | |
226 | static void ili9341_remove(struct spi_device *spi) |
227 | { |
228 | struct drm_device *drm = spi_get_drvdata(spi); |
229 | |
230 | drm_dev_unplug(dev: drm); |
231 | drm_atomic_helper_shutdown(dev: drm); |
232 | } |
233 | |
234 | static void ili9341_shutdown(struct spi_device *spi) |
235 | { |
236 | drm_atomic_helper_shutdown(dev: spi_get_drvdata(spi)); |
237 | } |
238 | |
239 | static struct spi_driver ili9341_spi_driver = { |
240 | .driver = { |
241 | .name = "ili9341" , |
242 | .of_match_table = ili9341_of_match, |
243 | }, |
244 | .id_table = ili9341_id, |
245 | .probe = ili9341_probe, |
246 | .remove = ili9341_remove, |
247 | .shutdown = ili9341_shutdown, |
248 | }; |
249 | module_spi_driver(ili9341_spi_driver); |
250 | |
251 | MODULE_DESCRIPTION("Ilitek ILI9341 DRM driver" ); |
252 | MODULE_AUTHOR("David Lechner <david@lechnology.com>" ); |
253 | MODULE_LICENSE("GPL" ); |
254 | |