1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) 2015 Red Hat
4 * Copyright (C) 2015 Sony Mobile Communications Inc.
5 * Author: Werner Johansson <werner.johansson@sonymobile.com>
6 *
7 * Based on AUO panel driver by Rob Clark <robdclark@gmail.com>
8 */
9
10 #include <linux/delay.h>
11 #include <linux/gpio/consumer.h>
12 #include <linux/module.h>
13 #include <linux/of.h>
14 #include <linux/regulator/consumer.h>
15
16 #include <video/mipi_display.h>
17
18 #include <drm/drm_crtc.h>
19 #include <drm/drm_device.h>
20 #include <drm/drm_mipi_dsi.h>
21 #include <drm/drm_panel.h>
22
23 struct sharp_nt_panel {
24 struct drm_panel base;
25 struct mipi_dsi_device *dsi;
26
27 struct regulator *supply;
28 struct gpio_desc *reset_gpio;
29 };
30
to_sharp_nt_panel(struct drm_panel * panel)31 static inline struct sharp_nt_panel *to_sharp_nt_panel(struct drm_panel *panel)
32 {
33 return container_of(panel, struct sharp_nt_panel, base);
34 }
35
sharp_nt_panel_init(struct sharp_nt_panel * sharp_nt)36 static int sharp_nt_panel_init(struct sharp_nt_panel *sharp_nt)
37 {
38 struct mipi_dsi_device *dsi = sharp_nt->dsi;
39 int ret;
40
41 dsi->mode_flags |= MIPI_DSI_MODE_LPM;
42
43 ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
44 if (ret < 0)
45 return ret;
46
47 msleep(120);
48
49 /* Novatek two-lane operation */
50 ret = mipi_dsi_dcs_write(dsi, 0xae, (u8[]){ 0x03 }, 1);
51 if (ret < 0)
52 return ret;
53
54 /* Set both MCU and RGB I/F to 24bpp */
55 ret = mipi_dsi_dcs_set_pixel_format(dsi, MIPI_DCS_PIXEL_FMT_24BIT |
56 (MIPI_DCS_PIXEL_FMT_24BIT << 4));
57 if (ret < 0)
58 return ret;
59
60 return 0;
61 }
62
sharp_nt_panel_on(struct sharp_nt_panel * sharp_nt)63 static int sharp_nt_panel_on(struct sharp_nt_panel *sharp_nt)
64 {
65 struct mipi_dsi_device *dsi = sharp_nt->dsi;
66 int ret;
67
68 dsi->mode_flags |= MIPI_DSI_MODE_LPM;
69
70 ret = mipi_dsi_dcs_set_display_on(dsi);
71 if (ret < 0)
72 return ret;
73
74 return 0;
75 }
76
sharp_nt_panel_off(struct sharp_nt_panel * sharp_nt)77 static int sharp_nt_panel_off(struct sharp_nt_panel *sharp_nt)
78 {
79 struct mipi_dsi_device *dsi = sharp_nt->dsi;
80 int ret;
81
82 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
83
84 ret = mipi_dsi_dcs_set_display_off(dsi);
85 if (ret < 0)
86 return ret;
87
88 ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
89 if (ret < 0)
90 return ret;
91
92 return 0;
93 }
94
sharp_nt_panel_unprepare(struct drm_panel * panel)95 static int sharp_nt_panel_unprepare(struct drm_panel *panel)
96 {
97 struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
98 int ret;
99
100 ret = sharp_nt_panel_off(sharp_nt);
101 if (ret < 0) {
102 dev_err(panel->dev, "failed to set panel off: %d\n", ret);
103 return ret;
104 }
105
106 regulator_disable(sharp_nt->supply);
107 if (sharp_nt->reset_gpio)
108 gpiod_set_value(sharp_nt->reset_gpio, 0);
109
110 return 0;
111 }
112
sharp_nt_panel_prepare(struct drm_panel * panel)113 static int sharp_nt_panel_prepare(struct drm_panel *panel)
114 {
115 struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
116 int ret;
117
118 ret = regulator_enable(sharp_nt->supply);
119 if (ret < 0)
120 return ret;
121
122 msleep(20);
123
124 if (sharp_nt->reset_gpio) {
125 gpiod_set_value(sharp_nt->reset_gpio, 1);
126 msleep(1);
127 gpiod_set_value(sharp_nt->reset_gpio, 0);
128 msleep(1);
129 gpiod_set_value(sharp_nt->reset_gpio, 1);
130 msleep(10);
131 }
132
133 ret = sharp_nt_panel_init(sharp_nt);
134 if (ret < 0) {
135 dev_err(panel->dev, "failed to init panel: %d\n", ret);
136 goto poweroff;
137 }
138
139 ret = sharp_nt_panel_on(sharp_nt);
140 if (ret < 0) {
141 dev_err(panel->dev, "failed to set panel on: %d\n", ret);
142 goto poweroff;
143 }
144
145 return 0;
146
147 poweroff:
148 regulator_disable(sharp_nt->supply);
149 if (sharp_nt->reset_gpio)
150 gpiod_set_value(sharp_nt->reset_gpio, 0);
151 return ret;
152 }
153
154 static const struct drm_display_mode default_mode = {
155 .clock = (540 + 48 + 32 + 80) * (960 + 3 + 10 + 15) * 60 / 1000,
156 .hdisplay = 540,
157 .hsync_start = 540 + 48,
158 .hsync_end = 540 + 48 + 32,
159 .htotal = 540 + 48 + 32 + 80,
160 .vdisplay = 960,
161 .vsync_start = 960 + 3,
162 .vsync_end = 960 + 3 + 10,
163 .vtotal = 960 + 3 + 10 + 15,
164 };
165
sharp_nt_panel_get_modes(struct drm_panel * panel,struct drm_connector * connector)166 static int sharp_nt_panel_get_modes(struct drm_panel *panel,
167 struct drm_connector *connector)
168 {
169 struct drm_display_mode *mode;
170
171 mode = drm_mode_duplicate(connector->dev, &default_mode);
172 if (!mode) {
173 dev_err(panel->dev, "failed to add mode %ux%u@%u\n",
174 default_mode.hdisplay, default_mode.vdisplay,
175 drm_mode_vrefresh(&default_mode));
176 return -ENOMEM;
177 }
178
179 drm_mode_set_name(mode);
180
181 drm_mode_probed_add(connector, mode);
182
183 connector->display_info.width_mm = 54;
184 connector->display_info.height_mm = 95;
185
186 return 1;
187 }
188
189 static const struct drm_panel_funcs sharp_nt_panel_funcs = {
190 .unprepare = sharp_nt_panel_unprepare,
191 .prepare = sharp_nt_panel_prepare,
192 .get_modes = sharp_nt_panel_get_modes,
193 };
194
sharp_nt_panel_add(struct sharp_nt_panel * sharp_nt)195 static int sharp_nt_panel_add(struct sharp_nt_panel *sharp_nt)
196 {
197 struct device *dev = &sharp_nt->dsi->dev;
198 int ret;
199
200 sharp_nt->supply = devm_regulator_get(dev, "avdd");
201 if (IS_ERR(sharp_nt->supply))
202 return PTR_ERR(sharp_nt->supply);
203
204 sharp_nt->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
205 if (IS_ERR(sharp_nt->reset_gpio)) {
206 dev_err(dev, "cannot get reset-gpios %ld\n",
207 PTR_ERR(sharp_nt->reset_gpio));
208 sharp_nt->reset_gpio = NULL;
209 } else {
210 gpiod_set_value(sharp_nt->reset_gpio, 0);
211 }
212
213 drm_panel_init(&sharp_nt->base, &sharp_nt->dsi->dev,
214 &sharp_nt_panel_funcs, DRM_MODE_CONNECTOR_DSI);
215
216 ret = drm_panel_of_backlight(&sharp_nt->base);
217 if (ret)
218 return ret;
219
220 drm_panel_add(&sharp_nt->base);
221
222 return 0;
223 }
224
sharp_nt_panel_del(struct sharp_nt_panel * sharp_nt)225 static void sharp_nt_panel_del(struct sharp_nt_panel *sharp_nt)
226 {
227 if (sharp_nt->base.dev)
228 drm_panel_remove(&sharp_nt->base);
229 }
230
sharp_nt_panel_probe(struct mipi_dsi_device * dsi)231 static int sharp_nt_panel_probe(struct mipi_dsi_device *dsi)
232 {
233 struct sharp_nt_panel *sharp_nt;
234 int ret;
235
236 dsi->lanes = 2;
237 dsi->format = MIPI_DSI_FMT_RGB888;
238 dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
239 MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
240 MIPI_DSI_MODE_VIDEO_HSE |
241 MIPI_DSI_CLOCK_NON_CONTINUOUS |
242 MIPI_DSI_MODE_NO_EOT_PACKET;
243
244 sharp_nt = devm_kzalloc(&dsi->dev, sizeof(*sharp_nt), GFP_KERNEL);
245 if (!sharp_nt)
246 return -ENOMEM;
247
248 mipi_dsi_set_drvdata(dsi, sharp_nt);
249
250 sharp_nt->dsi = dsi;
251
252 ret = sharp_nt_panel_add(sharp_nt);
253 if (ret < 0)
254 return ret;
255
256 ret = mipi_dsi_attach(dsi);
257 if (ret < 0) {
258 sharp_nt_panel_del(sharp_nt);
259 return ret;
260 }
261
262 return 0;
263 }
264
sharp_nt_panel_remove(struct mipi_dsi_device * dsi)265 static void sharp_nt_panel_remove(struct mipi_dsi_device *dsi)
266 {
267 struct sharp_nt_panel *sharp_nt = mipi_dsi_get_drvdata(dsi);
268 int ret;
269
270 ret = mipi_dsi_detach(dsi);
271 if (ret < 0)
272 dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret);
273
274 sharp_nt_panel_del(sharp_nt);
275 }
276
277 static const struct of_device_id sharp_nt_of_match[] = {
278 { .compatible = "sharp,ls043t1le01-qhd", },
279 { }
280 };
281 MODULE_DEVICE_TABLE(of, sharp_nt_of_match);
282
283 static struct mipi_dsi_driver sharp_nt_panel_driver = {
284 .driver = {
285 .name = "panel-sharp-ls043t1le01-qhd",
286 .of_match_table = sharp_nt_of_match,
287 },
288 .probe = sharp_nt_panel_probe,
289 .remove = sharp_nt_panel_remove,
290 };
291 module_mipi_dsi_driver(sharp_nt_panel_driver);
292
293 MODULE_AUTHOR("Werner Johansson <werner.johansson@sonymobile.com>");
294 MODULE_DESCRIPTION("Sharp LS043T1LE01 NT35565-based qHD (540x960) video mode panel driver");
295 MODULE_LICENSE("GPL v2");
296