blob: b29fe86158f7a672cabac47f2a0c81fc148b5720 [file] [log] [blame]
Noralf Trønnes1f47e6c2017-01-22 15:23:48 +01001/*
2 * DRM driver for Multi-Inno MI0283QT panels
3 *
4 * Copyright 2016 Noralf Trønnes
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 */
11
12#include <drm/tinydrm/ili9341.h>
13#include <drm/tinydrm/mipi-dbi.h>
14#include <drm/tinydrm/tinydrm-helpers.h>
15#include <linux/delay.h>
16#include <linux/gpio/consumer.h>
17#include <linux/module.h>
18#include <linux/property.h>
19#include <linux/regulator/consumer.h>
20#include <linux/spi/spi.h>
21#include <video/mipi_display.h>
22
23static int mi0283qt_init(struct mipi_dbi *mipi)
24{
25 struct tinydrm_device *tdev = &mipi->tinydrm;
26 struct device *dev = tdev->drm->dev;
27 u8 addr_mode;
28 int ret;
29
30 DRM_DEBUG_KMS("\n");
31
32 ret = regulator_enable(mipi->regulator);
33 if (ret) {
34 dev_err(dev, "Failed to enable regulator %d\n", ret);
35 return ret;
36 }
37
38 /* Avoid flicker by skipping setup if the bootloader has done it */
39 if (mipi_dbi_display_is_on(mipi))
40 return 0;
41
42 mipi_dbi_hw_reset(mipi);
43 ret = mipi_dbi_command(mipi, MIPI_DCS_SOFT_RESET);
44 if (ret) {
45 dev_err(dev, "Error sending command %d\n", ret);
46 regulator_disable(mipi->regulator);
47 return ret;
48 }
49
50 msleep(20);
51
52 mipi_dbi_command(mipi, MIPI_DCS_SET_DISPLAY_OFF);
53
54 mipi_dbi_command(mipi, ILI9341_PWCTRLB, 0x00, 0x83, 0x30);
55 mipi_dbi_command(mipi, ILI9341_PWRSEQ, 0x64, 0x03, 0x12, 0x81);
56 mipi_dbi_command(mipi, ILI9341_DTCTRLA, 0x85, 0x01, 0x79);
57 mipi_dbi_command(mipi, ILI9341_PWCTRLA, 0x39, 0x2c, 0x00, 0x34, 0x02);
58 mipi_dbi_command(mipi, ILI9341_PUMPCTRL, 0x20);
59 mipi_dbi_command(mipi, ILI9341_DTCTRLB, 0x00, 0x00);
60
61 /* Power Control */
62 mipi_dbi_command(mipi, ILI9341_PWCTRL1, 0x26);
63 mipi_dbi_command(mipi, ILI9341_PWCTRL2, 0x11);
64 /* VCOM */
65 mipi_dbi_command(mipi, ILI9341_VMCTRL1, 0x35, 0x3e);
66 mipi_dbi_command(mipi, ILI9341_VMCTRL2, 0xbe);
67
68 /* Memory Access Control */
69 mipi_dbi_command(mipi, MIPI_DCS_SET_PIXEL_FORMAT, 0x55);
70
71 switch (mipi->rotation) {
72 default:
73 addr_mode = ILI9341_MADCTL_MV | ILI9341_MADCTL_MY |
74 ILI9341_MADCTL_MX;
75 break;
76 case 90:
77 addr_mode = ILI9341_MADCTL_MY;
78 break;
79 case 180:
80 addr_mode = ILI9341_MADCTL_MV;
81 break;
82 case 270:
83 addr_mode = ILI9341_MADCTL_MX;
84 break;
85 }
86 addr_mode |= ILI9341_MADCTL_BGR;
87 mipi_dbi_command(mipi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
88
89 /* Frame Rate */
90 mipi_dbi_command(mipi, ILI9341_FRMCTR1, 0x00, 0x1b);
91
92 /* Gamma */
93 mipi_dbi_command(mipi, ILI9341_EN3GAM, 0x08);
94 mipi_dbi_command(mipi, MIPI_DCS_SET_GAMMA_CURVE, 0x01);
95 mipi_dbi_command(mipi, ILI9341_PGAMCTRL,
96 0x1f, 0x1a, 0x18, 0x0a, 0x0f, 0x06, 0x45, 0x87,
97 0x32, 0x0a, 0x07, 0x02, 0x07, 0x05, 0x00);
98 mipi_dbi_command(mipi, ILI9341_NGAMCTRL,
99 0x00, 0x25, 0x27, 0x05, 0x10, 0x09, 0x3a, 0x78,
100 0x4d, 0x05, 0x18, 0x0d, 0x38, 0x3a, 0x1f);
101
102 /* DDRAM */
103 mipi_dbi_command(mipi, ILI9341_ETMOD, 0x07);
104
105 /* Display */
106 mipi_dbi_command(mipi, ILI9341_DISCTRL, 0x0a, 0x82, 0x27, 0x00);
107 mipi_dbi_command(mipi, MIPI_DCS_EXIT_SLEEP_MODE);
108 msleep(100);
109
110 mipi_dbi_command(mipi, MIPI_DCS_SET_DISPLAY_ON);
111 msleep(100);
112
113 return 0;
114}
115
116static void mi0283qt_fini(void *data)
117{
118 struct mipi_dbi *mipi = data;
119
120 DRM_DEBUG_KMS("\n");
121 regulator_disable(mipi->regulator);
122}
123
124static const struct drm_simple_display_pipe_funcs mi0283qt_pipe_funcs = {
125 .enable = mipi_dbi_pipe_enable,
126 .disable = mipi_dbi_pipe_disable,
127 .update = tinydrm_display_pipe_update,
128 .prepare_fb = tinydrm_display_pipe_prepare_fb,
129};
130
131static const struct drm_display_mode mi0283qt_mode = {
132 TINYDRM_MODE(320, 240, 58, 43),
133};
134
135static struct drm_driver mi0283qt_driver = {
136 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME |
137 DRIVER_ATOMIC,
138 TINYDRM_GEM_DRIVER_OPS,
139 .lastclose = tinydrm_lastclose,
140 .debugfs_init = mipi_dbi_debugfs_init,
141 .name = "mi0283qt",
142 .desc = "Multi-Inno MI0283QT",
143 .date = "20160614",
144 .major = 1,
145 .minor = 0,
146};
147
148static const struct of_device_id mi0283qt_of_match[] = {
149 { .compatible = "multi-inno,mi0283qt" },
150 {},
151};
152MODULE_DEVICE_TABLE(of, mi0283qt_of_match);
153
154static const struct spi_device_id mi0283qt_id[] = {
155 { "mi0283qt", 0 },
156 { },
157};
158MODULE_DEVICE_TABLE(spi, mi0283qt_id);
159
160static int mi0283qt_probe(struct spi_device *spi)
161{
162 struct device *dev = &spi->dev;
163 struct tinydrm_device *tdev;
164 struct mipi_dbi *mipi;
165 struct gpio_desc *dc;
166 u32 rotation = 0;
167 int ret;
168
169 mipi = devm_kzalloc(dev, sizeof(*mipi), GFP_KERNEL);
170 if (!mipi)
171 return -ENOMEM;
172
173 mipi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
174 if (IS_ERR(mipi->reset)) {
175 dev_err(dev, "Failed to get gpio 'reset'\n");
176 return PTR_ERR(mipi->reset);
177 }
178
179 dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW);
180 if (IS_ERR(dc)) {
181 dev_err(dev, "Failed to get gpio 'dc'\n");
182 return PTR_ERR(dc);
183 }
184
185 mipi->regulator = devm_regulator_get(dev, "power");
186 if (IS_ERR(mipi->regulator))
187 return PTR_ERR(mipi->regulator);
188
189 mipi->backlight = tinydrm_of_find_backlight(dev);
190 if (IS_ERR(mipi->backlight))
191 return PTR_ERR(mipi->backlight);
192
193 device_property_read_u32(dev, "rotation", &rotation);
194
195 ret = mipi_dbi_spi_init(spi, mipi, dc, &mi0283qt_pipe_funcs,
196 &mi0283qt_driver, &mi0283qt_mode, rotation);
197 if (ret)
198 return ret;
199
200 ret = mi0283qt_init(mipi);
201 if (ret)
202 return ret;
203
204 /* use devres to fini after drm unregister (drv->remove is before) */
205 ret = devm_add_action(dev, mi0283qt_fini, mipi);
206 if (ret) {
207 mi0283qt_fini(mipi);
208 return ret;
209 }
210
211 tdev = &mipi->tinydrm;
212
213 ret = devm_tinydrm_register(tdev);
214 if (ret)
215 return ret;
216
217 spi_set_drvdata(spi, mipi);
218
219 DRM_DEBUG_DRIVER("Initialized %s:%s @%uMHz on minor %d\n",
220 tdev->drm->driver->name, dev_name(dev),
221 spi->max_speed_hz / 1000000,
222 tdev->drm->primary->index);
223
224 return 0;
225}
226
227static void mi0283qt_shutdown(struct spi_device *spi)
228{
229 struct mipi_dbi *mipi = spi_get_drvdata(spi);
230
231 tinydrm_shutdown(&mipi->tinydrm);
232}
233
234static int __maybe_unused mi0283qt_pm_suspend(struct device *dev)
235{
236 struct mipi_dbi *mipi = dev_get_drvdata(dev);
237 int ret;
238
239 ret = tinydrm_suspend(&mipi->tinydrm);
240 if (ret)
241 return ret;
242
243 mi0283qt_fini(mipi);
244
245 return 0;
246}
247
248static int __maybe_unused mi0283qt_pm_resume(struct device *dev)
249{
250 struct mipi_dbi *mipi = dev_get_drvdata(dev);
251 int ret;
252
253 ret = mi0283qt_init(mipi);
254 if (ret)
255 return ret;
256
257 return tinydrm_resume(&mipi->tinydrm);
258}
259
260static const struct dev_pm_ops mi0283qt_pm_ops = {
261 SET_SYSTEM_SLEEP_PM_OPS(mi0283qt_pm_suspend, mi0283qt_pm_resume)
262};
263
264static struct spi_driver mi0283qt_spi_driver = {
265 .driver = {
266 .name = "mi0283qt",
267 .owner = THIS_MODULE,
268 .of_match_table = mi0283qt_of_match,
269 .pm = &mi0283qt_pm_ops,
270 },
271 .id_table = mi0283qt_id,
272 .probe = mi0283qt_probe,
273 .shutdown = mi0283qt_shutdown,
274};
275module_spi_driver(mi0283qt_spi_driver);
276
277MODULE_DESCRIPTION("Multi-Inno MI0283QT DRM driver");
278MODULE_AUTHOR("Noralf Trønnes");
279MODULE_LICENSE("GPL");