1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * DRM driver for Multi-Inno MI0283QT panels |
4 | * |
5 | * Copyright 2016 Noralf Trønnes |
6 | */ |
7 | |
8 | #include <linux/backlight.h> |
9 | #include <linux/delay.h> |
10 | #include <linux/gpio/consumer.h> |
11 | #include <linux/module.h> |
12 | #include <linux/property.h> |
13 | #include <linux/regulator/consumer.h> |
14 | #include <linux/spi/spi.h> |
15 | |
16 | #include <drm/drm_atomic_helper.h> |
17 | #include <drm/drm_drv.h> |
18 | #include <drm/drm_fbdev_generic.h> |
19 | #include <drm/drm_gem_atomic_helper.h> |
20 | #include <drm/drm_gem_dma_helper.h> |
21 | #include <drm/drm_managed.h> |
22 | #include <drm/drm_mipi_dbi.h> |
23 | #include <drm/drm_modeset_helper.h> |
24 | #include <video/mipi_display.h> |
25 | |
26 | #define ILI9341_FRMCTR1 0xb1 |
27 | #define ILI9341_DISCTRL 0xb6 |
28 | #define ILI9341_ETMOD 0xb7 |
29 | |
30 | #define ILI9341_PWCTRL1 0xc0 |
31 | #define ILI9341_PWCTRL2 0xc1 |
32 | #define ILI9341_VMCTRL1 0xc5 |
33 | #define ILI9341_VMCTRL2 0xc7 |
34 | #define ILI9341_PWCTRLA 0xcb |
35 | #define ILI9341_PWCTRLB 0xcf |
36 | |
37 | #define ILI9341_PGAMCTRL 0xe0 |
38 | #define ILI9341_NGAMCTRL 0xe1 |
39 | #define ILI9341_DTCTRLA 0xe8 |
40 | #define ILI9341_DTCTRLB 0xea |
41 | #define ILI9341_PWRSEQ 0xed |
42 | |
43 | #define ILI9341_EN3GAM 0xf2 |
44 | #define ILI9341_PUMPCTRL 0xf7 |
45 | |
46 | #define ILI9341_MADCTL_BGR BIT(3) |
47 | #define ILI9341_MADCTL_MV BIT(5) |
48 | #define ILI9341_MADCTL_MX BIT(6) |
49 | #define ILI9341_MADCTL_MY BIT(7) |
50 | |
51 | static void mi0283qt_enable(struct drm_simple_display_pipe *pipe, |
52 | struct drm_crtc_state *crtc_state, |
53 | struct drm_plane_state *plane_state) |
54 | { |
55 | struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(drm: pipe->crtc.dev); |
56 | struct mipi_dbi *dbi = &dbidev->dbi; |
57 | u8 addr_mode; |
58 | int ret, idx; |
59 | |
60 | if (!drm_dev_enter(dev: pipe->crtc.dev, idx: &idx)) |
61 | return; |
62 | |
63 | DRM_DEBUG_KMS("\n" ); |
64 | |
65 | ret = mipi_dbi_poweron_conditional_reset(dbidev); |
66 | if (ret < 0) |
67 | goto out_exit; |
68 | if (ret == 1) |
69 | goto out_enable; |
70 | |
71 | mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF); |
72 | |
73 | mipi_dbi_command(dbi, ILI9341_PWCTRLB, 0x00, 0x83, 0x30); |
74 | mipi_dbi_command(dbi, ILI9341_PWRSEQ, 0x64, 0x03, 0x12, 0x81); |
75 | mipi_dbi_command(dbi, ILI9341_DTCTRLA, 0x85, 0x01, 0x79); |
76 | mipi_dbi_command(dbi, ILI9341_PWCTRLA, 0x39, 0x2c, 0x00, 0x34, 0x02); |
77 | mipi_dbi_command(dbi, ILI9341_PUMPCTRL, 0x20); |
78 | mipi_dbi_command(dbi, ILI9341_DTCTRLB, 0x00, 0x00); |
79 | |
80 | /* Power Control */ |
81 | mipi_dbi_command(dbi, ILI9341_PWCTRL1, 0x26); |
82 | mipi_dbi_command(dbi, ILI9341_PWCTRL2, 0x11); |
83 | /* VCOM */ |
84 | mipi_dbi_command(dbi, ILI9341_VMCTRL1, 0x35, 0x3e); |
85 | mipi_dbi_command(dbi, ILI9341_VMCTRL2, 0xbe); |
86 | |
87 | /* Memory Access Control */ |
88 | mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT); |
89 | |
90 | /* Frame Rate */ |
91 | mipi_dbi_command(dbi, ILI9341_FRMCTR1, 0x00, 0x1b); |
92 | |
93 | /* Gamma */ |
94 | mipi_dbi_command(dbi, ILI9341_EN3GAM, 0x08); |
95 | mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, 0x01); |
96 | mipi_dbi_command(dbi, ILI9341_PGAMCTRL, |
97 | 0x1f, 0x1a, 0x18, 0x0a, 0x0f, 0x06, 0x45, 0x87, |
98 | 0x32, 0x0a, 0x07, 0x02, 0x07, 0x05, 0x00); |
99 | mipi_dbi_command(dbi, ILI9341_NGAMCTRL, |
100 | 0x00, 0x25, 0x27, 0x05, 0x10, 0x09, 0x3a, 0x78, |
101 | 0x4d, 0x05, 0x18, 0x0d, 0x38, 0x3a, 0x1f); |
102 | |
103 | /* DDRAM */ |
104 | mipi_dbi_command(dbi, ILI9341_ETMOD, 0x07); |
105 | |
106 | /* Display */ |
107 | mipi_dbi_command(dbi, ILI9341_DISCTRL, 0x0a, 0x82, 0x27, 0x00); |
108 | mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE); |
109 | msleep(msecs: 100); |
110 | |
111 | mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON); |
112 | msleep(msecs: 100); |
113 | |
114 | out_enable: |
115 | /* The PiTFT (ili9340) has a hardware reset circuit that |
116 | * resets only on power-on and not on each reboot through |
117 | * a gpio like the rpi-display does. |
118 | * As a result, we need to always apply the rotation value |
119 | * regardless of the display "on/off" state. |
120 | */ |
121 | switch (dbidev->rotation) { |
122 | default: |
123 | addr_mode = ILI9341_MADCTL_MV | ILI9341_MADCTL_MY | |
124 | ILI9341_MADCTL_MX; |
125 | break; |
126 | case 90: |
127 | addr_mode = ILI9341_MADCTL_MY; |
128 | break; |
129 | case 180: |
130 | addr_mode = ILI9341_MADCTL_MV; |
131 | break; |
132 | case 270: |
133 | addr_mode = ILI9341_MADCTL_MX; |
134 | break; |
135 | } |
136 | addr_mode |= ILI9341_MADCTL_BGR; |
137 | mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode); |
138 | mipi_dbi_enable_flush(dbidev, crtc_state, plan_state: plane_state); |
139 | out_exit: |
140 | drm_dev_exit(idx); |
141 | } |
142 | |
143 | static const struct drm_simple_display_pipe_funcs mi0283qt_pipe_funcs = { |
144 | DRM_MIPI_DBI_SIMPLE_DISPLAY_PIPE_FUNCS(mi0283qt_enable), |
145 | }; |
146 | |
147 | static const struct drm_display_mode mi0283qt_mode = { |
148 | DRM_SIMPLE_MODE(320, 240, 58, 43), |
149 | }; |
150 | |
151 | DEFINE_DRM_GEM_DMA_FOPS(mi0283qt_fops); |
152 | |
153 | static const struct drm_driver mi0283qt_driver = { |
154 | .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, |
155 | .fops = &mi0283qt_fops, |
156 | DRM_GEM_DMA_DRIVER_OPS_VMAP, |
157 | .debugfs_init = mipi_dbi_debugfs_init, |
158 | .name = "mi0283qt" , |
159 | .desc = "Multi-Inno MI0283QT" , |
160 | .date = "20160614" , |
161 | .major = 1, |
162 | .minor = 0, |
163 | }; |
164 | |
165 | static const struct of_device_id mi0283qt_of_match[] = { |
166 | { .compatible = "multi-inno,mi0283qt" }, |
167 | {}, |
168 | }; |
169 | MODULE_DEVICE_TABLE(of, mi0283qt_of_match); |
170 | |
171 | static const struct spi_device_id mi0283qt_id[] = { |
172 | { "mi0283qt" , 0 }, |
173 | { }, |
174 | }; |
175 | MODULE_DEVICE_TABLE(spi, mi0283qt_id); |
176 | |
177 | static int mi0283qt_probe(struct spi_device *spi) |
178 | { |
179 | struct device *dev = &spi->dev; |
180 | struct mipi_dbi_dev *dbidev; |
181 | struct drm_device *drm; |
182 | struct mipi_dbi *dbi; |
183 | struct gpio_desc *dc; |
184 | u32 rotation = 0; |
185 | int ret; |
186 | |
187 | dbidev = devm_drm_dev_alloc(dev, &mi0283qt_driver, |
188 | struct mipi_dbi_dev, drm); |
189 | if (IS_ERR(ptr: dbidev)) |
190 | return PTR_ERR(ptr: dbidev); |
191 | |
192 | dbi = &dbidev->dbi; |
193 | drm = &dbidev->drm; |
194 | |
195 | dbi->reset = devm_gpiod_get_optional(dev, con_id: "reset" , flags: GPIOD_OUT_HIGH); |
196 | if (IS_ERR(ptr: dbi->reset)) |
197 | return dev_err_probe(dev, err: PTR_ERR(ptr: dbi->reset), fmt: "Failed to get GPIO 'reset'\n" ); |
198 | |
199 | dc = devm_gpiod_get_optional(dev, con_id: "dc" , flags: GPIOD_OUT_LOW); |
200 | if (IS_ERR(ptr: dc)) |
201 | return dev_err_probe(dev, err: PTR_ERR(ptr: dc), fmt: "Failed to get GPIO 'dc'\n" ); |
202 | |
203 | dbidev->regulator = devm_regulator_get(dev, id: "power" ); |
204 | if (IS_ERR(ptr: dbidev->regulator)) |
205 | return PTR_ERR(ptr: dbidev->regulator); |
206 | |
207 | dbidev->backlight = devm_of_find_backlight(dev); |
208 | if (IS_ERR(ptr: dbidev->backlight)) |
209 | return PTR_ERR(ptr: dbidev->backlight); |
210 | |
211 | device_property_read_u32(dev, propname: "rotation" , val: &rotation); |
212 | |
213 | ret = mipi_dbi_spi_init(spi, dbi, dc); |
214 | if (ret) |
215 | return ret; |
216 | |
217 | ret = mipi_dbi_dev_init(dbidev, funcs: &mi0283qt_pipe_funcs, mode: &mi0283qt_mode, rotation); |
218 | if (ret) |
219 | return ret; |
220 | |
221 | drm_mode_config_reset(dev: drm); |
222 | |
223 | ret = drm_dev_register(dev: drm, flags: 0); |
224 | if (ret) |
225 | return ret; |
226 | |
227 | spi_set_drvdata(spi, data: drm); |
228 | |
229 | drm_fbdev_generic_setup(dev: drm, preferred_bpp: 0); |
230 | |
231 | return 0; |
232 | } |
233 | |
234 | static void mi0283qt_remove(struct spi_device *spi) |
235 | { |
236 | struct drm_device *drm = spi_get_drvdata(spi); |
237 | |
238 | drm_dev_unplug(dev: drm); |
239 | drm_atomic_helper_shutdown(dev: drm); |
240 | } |
241 | |
242 | static void mi0283qt_shutdown(struct spi_device *spi) |
243 | { |
244 | drm_atomic_helper_shutdown(dev: spi_get_drvdata(spi)); |
245 | } |
246 | |
247 | static int __maybe_unused mi0283qt_pm_suspend(struct device *dev) |
248 | { |
249 | return drm_mode_config_helper_suspend(dev: dev_get_drvdata(dev)); |
250 | } |
251 | |
252 | static int __maybe_unused mi0283qt_pm_resume(struct device *dev) |
253 | { |
254 | drm_mode_config_helper_resume(dev: dev_get_drvdata(dev)); |
255 | |
256 | return 0; |
257 | } |
258 | |
259 | static const struct dev_pm_ops mi0283qt_pm_ops = { |
260 | SET_SYSTEM_SLEEP_PM_OPS(mi0283qt_pm_suspend, mi0283qt_pm_resume) |
261 | }; |
262 | |
263 | static struct spi_driver mi0283qt_spi_driver = { |
264 | .driver = { |
265 | .name = "mi0283qt" , |
266 | .owner = THIS_MODULE, |
267 | .of_match_table = mi0283qt_of_match, |
268 | .pm = &mi0283qt_pm_ops, |
269 | }, |
270 | .id_table = mi0283qt_id, |
271 | .probe = mi0283qt_probe, |
272 | .remove = mi0283qt_remove, |
273 | .shutdown = mi0283qt_shutdown, |
274 | }; |
275 | module_spi_driver(mi0283qt_spi_driver); |
276 | |
277 | MODULE_DESCRIPTION("Multi-Inno MI0283QT DRM driver" ); |
278 | MODULE_AUTHOR("Noralf Trønnes" ); |
279 | MODULE_LICENSE("GPL" ); |
280 | |