1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Synaptics R63353 Controller driver
4 *
5 * Copyright (C) 2020 BSH Hausgerate GmbH
6 */
7
8 #include <linux/delay.h>
9 #include <linux/device.h>
10 #include <linux/err.h>
11 #include <linux/errno.h>
12 #include <linux/kernel.h>
13 #include <linux/module.h>
14 #include <linux/of.h>
15 #include <linux/media-bus-format.h>
16
17 #include <linux/gpio/consumer.h>
18 #include <linux/regulator/consumer.h>
19
20 #include <drm/drm_mipi_dsi.h>
21 #include <drm/drm_modes.h>
22 #include <drm/drm_panel.h>
23
24 #include <video/mipi_display.h>
25
26 #define R63353_INSTR(...) { \
27 .len = sizeof((u8[]) {__VA_ARGS__}), \
28 .data = (u8[]){__VA_ARGS__} \
29 }
30
31 struct r63353_instr {
32 size_t len;
33 const u8 *data;
34 };
35
36 static const struct r63353_instr sharp_ls068b3sx02_init[] = {
37 R63353_INSTR(0x51, 0xff),
38 R63353_INSTR(0x53, 0x0c),
39 R63353_INSTR(0x55, 0x00),
40 R63353_INSTR(0x84, 0x00),
41 R63353_INSTR(0x29),
42 };
43
44 struct r63353_desc {
45 const char *name;
46 const struct r63353_instr *init;
47 const size_t init_length;
48 const struct drm_display_mode *mode;
49 u32 width_mm;
50 u32 height_mm;
51 };
52
53 struct r63353_panel {
54 struct drm_panel base;
55 struct mipi_dsi_device *dsi;
56
57 struct gpio_desc *reset_gpio;
58 struct regulator *dvdd;
59 struct regulator *avdd;
60
61 struct r63353_desc *pdata;
62 };
63
to_r63353_panel(struct drm_panel * panel)64 static inline struct r63353_panel *to_r63353_panel(struct drm_panel *panel)
65 {
66 return container_of(panel, struct r63353_panel, base);
67 }
68
r63353_panel_power_on(struct r63353_panel * rpanel)69 static int r63353_panel_power_on(struct r63353_panel *rpanel)
70 {
71 struct mipi_dsi_device *dsi = rpanel->dsi;
72 struct device *dev = &dsi->dev;
73 int ret;
74
75 ret = regulator_enable(rpanel->avdd);
76 if (ret) {
77 dev_err(dev, "Failed to enable avdd regulator (%d)\n", ret);
78 return ret;
79 }
80
81 usleep_range(15000, 25000);
82
83 ret = regulator_enable(rpanel->dvdd);
84 if (ret) {
85 dev_err(dev, "Failed to enable dvdd regulator (%d)\n", ret);
86 regulator_disable(rpanel->avdd);
87 return ret;
88 }
89
90 usleep_range(300000, 350000);
91 gpiod_set_value(rpanel->reset_gpio, 1);
92 usleep_range(15000, 25000);
93
94 return 0;
95 }
96
r63353_panel_power_off(struct r63353_panel * rpanel)97 static int r63353_panel_power_off(struct r63353_panel *rpanel)
98 {
99 gpiod_set_value(rpanel->reset_gpio, 0);
100 regulator_disable(rpanel->dvdd);
101 regulator_disable(rpanel->avdd);
102
103 return 0;
104 }
105
r63353_panel_activate(struct r63353_panel * rpanel)106 static int r63353_panel_activate(struct r63353_panel *rpanel)
107 {
108 struct mipi_dsi_device *dsi = rpanel->dsi;
109 struct device *dev = &dsi->dev;
110 int i, ret;
111
112 ret = mipi_dsi_dcs_soft_reset(dsi);
113 if (ret < 0) {
114 dev_err(dev, "Failed to do Software Reset (%d)\n", ret);
115 goto fail;
116 }
117
118 usleep_range(15000, 17000);
119
120 ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
121 if (ret < 0) {
122 dev_err(dev, "Failed to enter sleep mode (%d)\n", ret);
123 goto fail;
124 }
125
126 for (i = 0; i < rpanel->pdata->init_length; i++) {
127 const struct r63353_instr *instr = &rpanel->pdata->init[i];
128
129 ret = mipi_dsi_dcs_write_buffer(dsi, instr->data, instr->len);
130 if (ret < 0)
131 goto fail;
132 }
133
134 msleep(120);
135
136 ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
137 if (ret < 0) {
138 dev_err(dev, "Failed to exit sleep mode (%d)\n", ret);
139 goto fail;
140 }
141
142 usleep_range(5000, 10000);
143
144 ret = mipi_dsi_dcs_set_display_on(dsi);
145 if (ret < 0) {
146 dev_err(dev, "Failed to set display ON (%d)\n", ret);
147 goto fail;
148 }
149
150 return 0;
151
152 fail:
153 gpiod_set_value(rpanel->reset_gpio, 0);
154
155 return ret;
156 }
157
r63353_panel_prepare(struct drm_panel * panel)158 static int r63353_panel_prepare(struct drm_panel *panel)
159 {
160 struct r63353_panel *rpanel = to_r63353_panel(panel);
161 struct mipi_dsi_device *dsi = rpanel->dsi;
162 struct device *dev = &dsi->dev;
163 int ret;
164
165 dev_dbg(dev, "Preparing\n");
166
167 ret = r63353_panel_power_on(rpanel);
168 if (ret)
169 return ret;
170
171 ret = r63353_panel_activate(rpanel);
172 if (ret) {
173 r63353_panel_power_off(rpanel);
174 return ret;
175 }
176
177 dev_dbg(dev, "Prepared\n");
178 return 0;
179 }
180
r63353_panel_deactivate(struct r63353_panel * rpanel)181 static int r63353_panel_deactivate(struct r63353_panel *rpanel)
182 {
183 struct mipi_dsi_device *dsi = rpanel->dsi;
184 struct device *dev = &dsi->dev;
185 int ret;
186
187 ret = mipi_dsi_dcs_set_display_off(dsi);
188 if (ret < 0) {
189 dev_err(dev, "Failed to set display OFF (%d)\n", ret);
190 return ret;
191 }
192
193 usleep_range(5000, 10000);
194
195 ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
196 if (ret < 0) {
197 dev_err(dev, "Failed to enter sleep mode (%d)\n", ret);
198 return ret;
199 }
200
201 return 0;
202 }
203
r63353_panel_unprepare(struct drm_panel * panel)204 static int r63353_panel_unprepare(struct drm_panel *panel)
205 {
206 struct r63353_panel *rpanel = to_r63353_panel(panel);
207
208 r63353_panel_deactivate(rpanel);
209 r63353_panel_power_off(rpanel);
210
211 return 0;
212 }
213
214 static const struct drm_display_mode sharp_ls068b3sx02_timing = {
215 .clock = 70000,
216 .hdisplay = 640,
217 .hsync_start = 640 + 35,
218 .hsync_end = 640 + 35 + 2,
219 .htotal = 640 + 35 + 2 + 150,
220 .vdisplay = 1280,
221 .vsync_start = 1280 + 2,
222 .vsync_end = 1280 + 2 + 4,
223 .vtotal = 1280 + 2 + 4 + 0,
224 };
225
r63353_panel_get_modes(struct drm_panel * panel,struct drm_connector * connector)226 static int r63353_panel_get_modes(struct drm_panel *panel,
227 struct drm_connector *connector)
228 {
229 struct r63353_panel *rpanel = to_r63353_panel(panel);
230 struct drm_display_mode *mode;
231 static const u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
232
233 mode = drm_mode_duplicate(connector->dev, rpanel->pdata->mode);
234 if (!mode)
235 return -ENOMEM;
236
237 drm_mode_set_name(mode);
238 drm_mode_probed_add(connector, mode);
239
240 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
241 connector->display_info.width_mm = rpanel->pdata->width_mm;
242 connector->display_info.height_mm = rpanel->pdata->height_mm;
243
244 drm_display_info_set_bus_formats(&connector->display_info,
245 &bus_format, 1);
246
247 return 1;
248 }
249
250 static const struct drm_panel_funcs r63353_panel_funcs = {
251 .prepare = r63353_panel_prepare,
252 .unprepare = r63353_panel_unprepare,
253 .get_modes = r63353_panel_get_modes,
254 };
255
r63353_panel_probe(struct mipi_dsi_device * dsi)256 static int r63353_panel_probe(struct mipi_dsi_device *dsi)
257 {
258 int ret = 0;
259 struct device *dev = &dsi->dev;
260 struct r63353_panel *panel;
261
262 panel = devm_kzalloc(&dsi->dev, sizeof(*panel), GFP_KERNEL);
263 if (!panel)
264 return -ENOMEM;
265
266 mipi_dsi_set_drvdata(dsi, panel);
267 panel->dsi = dsi;
268 panel->pdata = (struct r63353_desc *)of_device_get_match_data(dev);
269
270 dev_info(dev, "Panel %s\n", panel->pdata->name);
271
272 dsi->lanes = 2;
273 dsi->format = MIPI_DSI_FMT_RGB888;
274 dsi->mode_flags = MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_VIDEO |
275 MIPI_DSI_CLOCK_NON_CONTINUOUS | MIPI_DSI_MODE_LPM |
276 MIPI_DSI_MODE_VIDEO_SYNC_PULSE | MIPI_DSI_MODE_NO_EOT_PACKET;
277
278 panel->dvdd = devm_regulator_get(dev, "dvdd");
279 if (IS_ERR(panel->dvdd))
280 return PTR_ERR(panel->dvdd);
281 panel->avdd = devm_regulator_get(dev, "avdd");
282 if (IS_ERR(panel->avdd))
283 return PTR_ERR(panel->avdd);
284
285 panel->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
286 if (IS_ERR(panel->reset_gpio)) {
287 dev_err(dev, "failed to get RESET GPIO\n");
288 return PTR_ERR(panel->reset_gpio);
289 }
290
291 drm_panel_init(&panel->base, dev, &r63353_panel_funcs,
292 DRM_MODE_CONNECTOR_DSI);
293
294 panel->base.prepare_prev_first = true;
295 ret = drm_panel_of_backlight(&panel->base);
296 if (ret)
297 return ret;
298
299 drm_panel_add(&panel->base);
300
301 ret = mipi_dsi_attach(dsi);
302 if (ret < 0) {
303 dev_err(dev, "mipi_dsi_attach failed: %d\n", ret);
304 drm_panel_remove(&panel->base);
305 return ret;
306 }
307
308 return ret;
309 }
310
r63353_panel_remove(struct mipi_dsi_device * dsi)311 static void r63353_panel_remove(struct mipi_dsi_device *dsi)
312 {
313 struct r63353_panel *rpanel = mipi_dsi_get_drvdata(dsi);
314 struct device *dev = &dsi->dev;
315 int ret;
316
317 ret = mipi_dsi_detach(dsi);
318 if (ret < 0)
319 dev_err(dev, "Failed to detach from host (%d)\n", ret);
320
321 drm_panel_remove(&rpanel->base);
322 }
323
r63353_panel_shutdown(struct mipi_dsi_device * dsi)324 static void r63353_panel_shutdown(struct mipi_dsi_device *dsi)
325 {
326 struct r63353_panel *rpanel = mipi_dsi_get_drvdata(dsi);
327
328 r63353_panel_unprepare(&rpanel->base);
329 }
330
331 static const struct r63353_desc sharp_ls068b3sx02_data = {
332 .name = "Sharp LS068B3SX02",
333 .mode = &sharp_ls068b3sx02_timing,
334 .init = sharp_ls068b3sx02_init,
335 .init_length = ARRAY_SIZE(sharp_ls068b3sx02_init),
336 .width_mm = 68,
337 .height_mm = 159,
338 };
339
340 static const struct of_device_id r63353_of_match[] = {
341 { .compatible = "sharp,ls068b3sx02", .data = &sharp_ls068b3sx02_data },
342 { }
343 };
344
345 MODULE_DEVICE_TABLE(of, r63353_of_match);
346
347 static struct mipi_dsi_driver r63353_panel_driver = {
348 .driver = {
349 .name = "r63353-dsi",
350 .of_match_table = r63353_of_match,
351 },
352 .probe = r63353_panel_probe,
353 .remove = r63353_panel_remove,
354 .shutdown = r63353_panel_shutdown,
355 };
356
357 module_mipi_dsi_driver(r63353_panel_driver);
358
359 MODULE_AUTHOR("Matthias Proske <Matthias.Proske@bshg.com>");
360 MODULE_AUTHOR("Michael Trimarchi <michael@amarulasolutions.com>");
361 MODULE_DESCRIPTION("Synaptics R63353 Controller Driver");
362 MODULE_LICENSE("GPL");
363