1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd
4  */
5 
6 #include <linux/delay.h>
7 #include <linux/gpio/consumer.h>
8 #include <linux/module.h>
9 #include <linux/of.h>
10 #include <linux/regulator/consumer.h>
11 
12 #include <video/mipi_display.h>
13 
14 #include <drm/drm_crtc.h>
15 #include <drm/drm_device.h>
16 #include <drm/drm_mipi_dsi.h>
17 #include <drm/drm_modes.h>
18 #include <drm/drm_panel.h>
19 
20 struct panel_init_cmd {
21 	size_t len;
22 	const char *data;
23 };
24 
25 #define _INIT_CMD(...) { \
26 	.len = sizeof((char[]){__VA_ARGS__}), \
27 	.data = (char[]){__VA_ARGS__} }
28 
29 struct panel_desc {
30 	const struct drm_display_mode *mode;
31 	unsigned int bpc;
32 	struct {
33 		unsigned int width;
34 		unsigned int height;
35 	} size;
36 
37 	unsigned long flags;
38 	enum mipi_dsi_pixel_format format;
39 	const struct panel_init_cmd *init_cmds;
40 	unsigned int lanes;
41 	const char * const *supply_names;
42 	unsigned int num_supplies;
43 	unsigned int sleep_mode_delay;
44 	unsigned int power_down_delay;
45 };
46 
47 struct innolux_panel {
48 	struct drm_panel base;
49 	struct mipi_dsi_device *link;
50 	const struct panel_desc *desc;
51 
52 	struct regulator_bulk_data *supplies;
53 	struct gpio_desc *enable_gpio;
54 
55 	bool prepared;
56 	bool enabled;
57 };
58 
59 static inline struct innolux_panel *to_innolux_panel(struct drm_panel *panel)
60 {
61 	return container_of(panel, struct innolux_panel, base);
62 }
63 
64 static int innolux_panel_disable(struct drm_panel *panel)
65 {
66 	struct innolux_panel *innolux = to_innolux_panel(panel);
67 
68 	if (!innolux->enabled)
69 		return 0;
70 
71 	innolux->enabled = false;
72 
73 	return 0;
74 }
75 
76 static int innolux_panel_unprepare(struct drm_panel *panel)
77 {
78 	struct innolux_panel *innolux = to_innolux_panel(panel);
79 	int err;
80 
81 	if (!innolux->prepared)
82 		return 0;
83 
84 	err = mipi_dsi_dcs_set_display_off(innolux->link);
85 	if (err < 0)
86 		dev_err(panel->dev, "failed to set display off: %d\n", err);
87 
88 	err = mipi_dsi_dcs_enter_sleep_mode(innolux->link);
89 	if (err < 0) {
90 		dev_err(panel->dev, "failed to enter sleep mode: %d\n", err);
91 		return err;
92 	}
93 
94 	if (innolux->desc->sleep_mode_delay)
95 		msleep(innolux->desc->sleep_mode_delay);
96 
97 	gpiod_set_value_cansleep(innolux->enable_gpio, 0);
98 
99 	if (innolux->desc->power_down_delay)
100 		msleep(innolux->desc->power_down_delay);
101 
102 	err = regulator_bulk_disable(innolux->desc->num_supplies,
103 				     innolux->supplies);
104 	if (err < 0)
105 		return err;
106 
107 	innolux->prepared = false;
108 
109 	return 0;
110 }
111 
112 static int innolux_panel_prepare(struct drm_panel *panel)
113 {
114 	struct innolux_panel *innolux = to_innolux_panel(panel);
115 	int err;
116 
117 	if (innolux->prepared)
118 		return 0;
119 
120 	gpiod_set_value_cansleep(innolux->enable_gpio, 0);
121 
122 	err = regulator_bulk_enable(innolux->desc->num_supplies,
123 				    innolux->supplies);
124 	if (err < 0)
125 		return err;
126 
127 	/* p079zca: t2 (20ms), p097pfg: t4 (15ms) */
128 	usleep_range(20000, 21000);
129 
130 	gpiod_set_value_cansleep(innolux->enable_gpio, 1);
131 
132 	/* p079zca: t4, p097pfg: t5 */
133 	usleep_range(20000, 21000);
134 
135 	if (innolux->desc->init_cmds) {
136 		const struct panel_init_cmd *cmds =
137 					innolux->desc->init_cmds;
138 		unsigned int i;
139 
140 		for (i = 0; cmds[i].len != 0; i++) {
141 			const struct panel_init_cmd *cmd = &cmds[i];
142 
143 			err = mipi_dsi_generic_write(innolux->link, cmd->data,
144 						     cmd->len);
145 			if (err < 0) {
146 				dev_err(panel->dev, "failed to write command %u\n", i);
147 				goto poweroff;
148 			}
149 
150 			/*
151 			 * Included by random guessing, because without this
152 			 * (or at least, some delay), the panel sometimes
153 			 * didn't appear to pick up the command sequence.
154 			 */
155 			err = mipi_dsi_dcs_nop(innolux->link);
156 			if (err < 0) {
157 				dev_err(panel->dev, "failed to send DCS nop: %d\n", err);
158 				goto poweroff;
159 			}
160 		}
161 	}
162 
163 	err = mipi_dsi_dcs_exit_sleep_mode(innolux->link);
164 	if (err < 0) {
165 		dev_err(panel->dev, "failed to exit sleep mode: %d\n", err);
166 		goto poweroff;
167 	}
168 
169 	/* T6: 120ms - 1000ms*/
170 	msleep(120);
171 
172 	err = mipi_dsi_dcs_set_display_on(innolux->link);
173 	if (err < 0) {
174 		dev_err(panel->dev, "failed to set display on: %d\n", err);
175 		goto poweroff;
176 	}
177 
178 	/* T7: 5ms */
179 	usleep_range(5000, 6000);
180 
181 	innolux->prepared = true;
182 
183 	return 0;
184 
185 poweroff:
186 	gpiod_set_value_cansleep(innolux->enable_gpio, 0);
187 	regulator_bulk_disable(innolux->desc->num_supplies, innolux->supplies);
188 
189 	return err;
190 }
191 
192 static int innolux_panel_enable(struct drm_panel *panel)
193 {
194 	struct innolux_panel *innolux = to_innolux_panel(panel);
195 
196 	if (innolux->enabled)
197 		return 0;
198 
199 	innolux->enabled = true;
200 
201 	return 0;
202 }
203 
204 static const char * const innolux_p079zca_supply_names[] = {
205 	"power",
206 };
207 
208 static const struct drm_display_mode innolux_p079zca_mode = {
209 	.clock = 56900,
210 	.hdisplay = 768,
211 	.hsync_start = 768 + 40,
212 	.hsync_end = 768 + 40 + 40,
213 	.htotal = 768 + 40 + 40 + 40,
214 	.vdisplay = 1024,
215 	.vsync_start = 1024 + 20,
216 	.vsync_end = 1024 + 20 + 4,
217 	.vtotal = 1024 + 20 + 4 + 20,
218 };
219 
220 static const struct panel_desc innolux_p079zca_panel_desc = {
221 	.mode = &innolux_p079zca_mode,
222 	.bpc = 8,
223 	.size = {
224 		.width = 120,
225 		.height = 160,
226 	},
227 	.flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
228 		 MIPI_DSI_MODE_LPM,
229 	.format = MIPI_DSI_FMT_RGB888,
230 	.lanes = 4,
231 	.supply_names = innolux_p079zca_supply_names,
232 	.num_supplies = ARRAY_SIZE(innolux_p079zca_supply_names),
233 	.power_down_delay = 80, /* T8: 80ms - 1000ms */
234 };
235 
236 static const char * const innolux_p097pfg_supply_names[] = {
237 	"avdd",
238 	"avee",
239 };
240 
241 static const struct drm_display_mode innolux_p097pfg_mode = {
242 	.clock = 229000,
243 	.hdisplay = 1536,
244 	.hsync_start = 1536 + 100,
245 	.hsync_end = 1536 + 100 + 24,
246 	.htotal = 1536 + 100 + 24 + 100,
247 	.vdisplay = 2048,
248 	.vsync_start = 2048 + 100,
249 	.vsync_end = 2048 + 100 + 2,
250 	.vtotal = 2048 + 100 + 2 + 18,
251 };
252 
253 /*
254  * Display manufacturer failed to provide init sequencing according to
255  * https://chromium-review.googlesource.com/c/chromiumos/third_party/coreboot/+/892065/
256  * so the init sequence stems from a register dump of a working panel.
257  */
258 static const struct panel_init_cmd innolux_p097pfg_init_cmds[] = {
259 	/* page 0 */
260 	_INIT_CMD(0xF0, 0x55, 0xAA, 0x52, 0x08, 0x00),
261 	_INIT_CMD(0xB1, 0xE8, 0x11),
262 	_INIT_CMD(0xB2, 0x25, 0x02),
263 	_INIT_CMD(0xB5, 0x08, 0x00),
264 	_INIT_CMD(0xBC, 0x0F, 0x00),
265 	_INIT_CMD(0xB8, 0x03, 0x06, 0x00, 0x00),
266 	_INIT_CMD(0xBD, 0x01, 0x90, 0x14, 0x14),
267 	_INIT_CMD(0x6F, 0x01),
268 	_INIT_CMD(0xC0, 0x03),
269 	_INIT_CMD(0x6F, 0x02),
270 	_INIT_CMD(0xC1, 0x0D),
271 	_INIT_CMD(0xD9, 0x01, 0x09, 0x70),
272 	_INIT_CMD(0xC5, 0x12, 0x21, 0x00),
273 	_INIT_CMD(0xBB, 0x93, 0x93),
274 
275 	/* page 1 */
276 	_INIT_CMD(0xF0, 0x55, 0xAA, 0x52, 0x08, 0x01),
277 	_INIT_CMD(0xB3, 0x3C, 0x3C),
278 	_INIT_CMD(0xB4, 0x0F, 0x0F),
279 	_INIT_CMD(0xB9, 0x45, 0x45),
280 	_INIT_CMD(0xBA, 0x14, 0x14),
281 	_INIT_CMD(0xCA, 0x02),
282 	_INIT_CMD(0xCE, 0x04),
283 	_INIT_CMD(0xC3, 0x9B, 0x9B),
284 	_INIT_CMD(0xD8, 0xC0, 0x03),
285 	_INIT_CMD(0xBC, 0x82, 0x01),
286 	_INIT_CMD(0xBD, 0x9E, 0x01),
287 
288 	/* page 2 */
289 	_INIT_CMD(0xF0, 0x55, 0xAA, 0x52, 0x08, 0x02),
290 	_INIT_CMD(0xB0, 0x82),
291 	_INIT_CMD(0xD1, 0x00, 0x00, 0x00, 0x3E, 0x00, 0x82, 0x00, 0xA5,
292 		  0x00, 0xC1, 0x00, 0xEA, 0x01, 0x0D, 0x01, 0x40),
293 	_INIT_CMD(0xD2, 0x01, 0x6A, 0x01, 0xA8, 0x01, 0xDC, 0x02, 0x29,
294 		  0x02, 0x67, 0x02, 0x68, 0x02, 0xA8, 0x02, 0xF0),
295 	_INIT_CMD(0xD3, 0x03, 0x19, 0x03, 0x49, 0x03, 0x67, 0x03, 0x8C,
296 		  0x03, 0xA6, 0x03, 0xC7, 0x03, 0xDE, 0x03, 0xEC),
297 	_INIT_CMD(0xD4, 0x03, 0xFF, 0x03, 0xFF),
298 	_INIT_CMD(0xE0, 0x00, 0x00, 0x00, 0x86, 0x00, 0xC5, 0x00, 0xE5,
299 		  0x00, 0xFF, 0x01, 0x26, 0x01, 0x45, 0x01, 0x75),
300 	_INIT_CMD(0xE1, 0x01, 0x9C, 0x01, 0xD5, 0x02, 0x05, 0x02, 0x4D,
301 		  0x02, 0x86, 0x02, 0x87, 0x02, 0xC3, 0x03, 0x03),
302 	_INIT_CMD(0xE2, 0x03, 0x2A, 0x03, 0x56, 0x03, 0x72, 0x03, 0x94,
303 		  0x03, 0xAC, 0x03, 0xCB, 0x03, 0xE0, 0x03, 0xED),
304 	_INIT_CMD(0xE3, 0x03, 0xFF, 0x03, 0xFF),
305 
306 	/* page 3 */
307 	_INIT_CMD(0xF0, 0x55, 0xAA, 0x52, 0x08, 0x03),
308 	_INIT_CMD(0xB0, 0x00, 0x00, 0x00, 0x00),
309 	_INIT_CMD(0xB1, 0x00, 0x00, 0x00, 0x00),
310 	_INIT_CMD(0xB2, 0x00, 0x00, 0x06, 0x04, 0x01, 0x40, 0x85),
311 	_INIT_CMD(0xB3, 0x10, 0x07, 0xFC, 0x04, 0x01, 0x40, 0x80),
312 	_INIT_CMD(0xB6, 0xF0, 0x08, 0x00, 0x04, 0x00, 0x00, 0x00, 0x01,
313 		  0x40, 0x80),
314 	_INIT_CMD(0xBA, 0xC5, 0x07, 0x00, 0x04, 0x11, 0x25, 0x8C),
315 	_INIT_CMD(0xBB, 0xC5, 0x07, 0x00, 0x03, 0x11, 0x25, 0x8C),
316 	_INIT_CMD(0xC0, 0x00, 0x3C, 0x00, 0x00, 0x00, 0x80, 0x80),
317 	_INIT_CMD(0xC1, 0x00, 0x3C, 0x00, 0x00, 0x00, 0x80, 0x80),
318 	_INIT_CMD(0xC4, 0x00, 0x00),
319 	_INIT_CMD(0xEF, 0x41),
320 
321 	/* page 4 */
322 	_INIT_CMD(0xF0, 0x55, 0xAA, 0x52, 0x08, 0x04),
323 	_INIT_CMD(0xEC, 0x4C),
324 
325 	/* page 5 */
326 	_INIT_CMD(0xF0, 0x55, 0xAA, 0x52, 0x08, 0x05),
327 	_INIT_CMD(0xB0, 0x13, 0x03, 0x03, 0x01),
328 	_INIT_CMD(0xB1, 0x30, 0x00),
329 	_INIT_CMD(0xB2, 0x02, 0x02, 0x00),
330 	_INIT_CMD(0xB3, 0x82, 0x23, 0x82, 0x9D),
331 	_INIT_CMD(0xB4, 0xC5, 0x75, 0x24, 0x57),
332 	_INIT_CMD(0xB5, 0x00, 0xD4, 0x72, 0x11, 0x11, 0xAB, 0x0A),
333 	_INIT_CMD(0xB6, 0x00, 0x00, 0xD5, 0x72, 0x24, 0x56),
334 	_INIT_CMD(0xB7, 0x5C, 0xDC, 0x5C, 0x5C),
335 	_INIT_CMD(0xB9, 0x0C, 0x00, 0x00, 0x01, 0x00),
336 	_INIT_CMD(0xC0, 0x75, 0x11, 0x11, 0x54, 0x05),
337 	_INIT_CMD(0xC6, 0x00, 0x00, 0x00, 0x00),
338 	_INIT_CMD(0xD0, 0x00, 0x48, 0x08, 0x00, 0x00),
339 	_INIT_CMD(0xD1, 0x00, 0x48, 0x09, 0x00, 0x00),
340 
341 	/* page 6 */
342 	_INIT_CMD(0xF0, 0x55, 0xAA, 0x52, 0x08, 0x06),
343 	_INIT_CMD(0xB0, 0x02, 0x32, 0x32, 0x08, 0x2F),
344 	_INIT_CMD(0xB1, 0x2E, 0x15, 0x14, 0x13, 0x12),
345 	_INIT_CMD(0xB2, 0x11, 0x10, 0x00, 0x3D, 0x3D),
346 	_INIT_CMD(0xB3, 0x3D, 0x3D, 0x3D, 0x3D, 0x3D),
347 	_INIT_CMD(0xB4, 0x3D, 0x32),
348 	_INIT_CMD(0xB5, 0x03, 0x32, 0x32, 0x09, 0x2F),
349 	_INIT_CMD(0xB6, 0x2E, 0x1B, 0x1A, 0x19, 0x18),
350 	_INIT_CMD(0xB7, 0x17, 0x16, 0x01, 0x3D, 0x3D),
351 	_INIT_CMD(0xB8, 0x3D, 0x3D, 0x3D, 0x3D, 0x3D),
352 	_INIT_CMD(0xB9, 0x3D, 0x32),
353 	_INIT_CMD(0xC0, 0x01, 0x32, 0x32, 0x09, 0x2F),
354 	_INIT_CMD(0xC1, 0x2E, 0x1A, 0x1B, 0x16, 0x17),
355 	_INIT_CMD(0xC2, 0x18, 0x19, 0x03, 0x3D, 0x3D),
356 	_INIT_CMD(0xC3, 0x3D, 0x3D, 0x3D, 0x3D, 0x3D),
357 	_INIT_CMD(0xC4, 0x3D, 0x32),
358 	_INIT_CMD(0xC5, 0x00, 0x32, 0x32, 0x08, 0x2F),
359 	_INIT_CMD(0xC6, 0x2E, 0x14, 0x15, 0x10, 0x11),
360 	_INIT_CMD(0xC7, 0x12, 0x13, 0x02, 0x3D, 0x3D),
361 	_INIT_CMD(0xC8, 0x3D, 0x3D, 0x3D, 0x3D, 0x3D),
362 	_INIT_CMD(0xC9, 0x3D, 0x32),
363 
364 	{},
365 };
366 
367 static const struct panel_desc innolux_p097pfg_panel_desc = {
368 	.mode = &innolux_p097pfg_mode,
369 	.bpc = 8,
370 	.size = {
371 		.width = 147,
372 		.height = 196,
373 	},
374 	.flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
375 		 MIPI_DSI_MODE_LPM,
376 	.format = MIPI_DSI_FMT_RGB888,
377 	.init_cmds = innolux_p097pfg_init_cmds,
378 	.lanes = 4,
379 	.supply_names = innolux_p097pfg_supply_names,
380 	.num_supplies = ARRAY_SIZE(innolux_p097pfg_supply_names),
381 	.sleep_mode_delay = 100, /* T15 */
382 };
383 
384 static int innolux_panel_get_modes(struct drm_panel *panel,
385 				   struct drm_connector *connector)
386 {
387 	struct innolux_panel *innolux = to_innolux_panel(panel);
388 	const struct drm_display_mode *m = innolux->desc->mode;
389 	struct drm_display_mode *mode;
390 
391 	mode = drm_mode_duplicate(connector->dev, m);
392 	if (!mode) {
393 		dev_err(panel->dev, "failed to add mode %ux%u@%u\n",
394 			m->hdisplay, m->vdisplay, drm_mode_vrefresh(m));
395 		return -ENOMEM;
396 	}
397 
398 	drm_mode_set_name(mode);
399 
400 	drm_mode_probed_add(connector, mode);
401 
402 	connector->display_info.width_mm = innolux->desc->size.width;
403 	connector->display_info.height_mm = innolux->desc->size.height;
404 	connector->display_info.bpc = innolux->desc->bpc;
405 
406 	return 1;
407 }
408 
409 static const struct drm_panel_funcs innolux_panel_funcs = {
410 	.disable = innolux_panel_disable,
411 	.unprepare = innolux_panel_unprepare,
412 	.prepare = innolux_panel_prepare,
413 	.enable = innolux_panel_enable,
414 	.get_modes = innolux_panel_get_modes,
415 };
416 
417 static const struct of_device_id innolux_of_match[] = {
418 	{ .compatible = "innolux,p079zca",
419 	  .data = &innolux_p079zca_panel_desc
420 	},
421 	{ .compatible = "innolux,p097pfg",
422 	  .data = &innolux_p097pfg_panel_desc
423 	},
424 	{ }
425 };
426 MODULE_DEVICE_TABLE(of, innolux_of_match);
427 
428 static int innolux_panel_add(struct mipi_dsi_device *dsi,
429 			     const struct panel_desc *desc)
430 {
431 	struct innolux_panel *innolux;
432 	struct device *dev = &dsi->dev;
433 	int err, i;
434 
435 	innolux = devm_kzalloc(dev, sizeof(*innolux), GFP_KERNEL);
436 	if (!innolux)
437 		return -ENOMEM;
438 
439 	innolux->desc = desc;
440 
441 	innolux->supplies = devm_kcalloc(dev, desc->num_supplies,
442 					 sizeof(*innolux->supplies),
443 					 GFP_KERNEL);
444 	if (!innolux->supplies)
445 		return -ENOMEM;
446 
447 	for (i = 0; i < desc->num_supplies; i++)
448 		innolux->supplies[i].supply = desc->supply_names[i];
449 
450 	err = devm_regulator_bulk_get(dev, desc->num_supplies,
451 				      innolux->supplies);
452 	if (err < 0)
453 		return err;
454 
455 	innolux->enable_gpio = devm_gpiod_get_optional(dev, "enable",
456 						       GPIOD_OUT_HIGH);
457 	if (IS_ERR(innolux->enable_gpio)) {
458 		err = PTR_ERR(innolux->enable_gpio);
459 		dev_dbg(dev, "failed to get enable gpio: %d\n", err);
460 		innolux->enable_gpio = NULL;
461 	}
462 
463 	drm_panel_init(&innolux->base, dev, &innolux_panel_funcs,
464 		       DRM_MODE_CONNECTOR_DSI);
465 
466 	err = drm_panel_of_backlight(&innolux->base);
467 	if (err)
468 		return err;
469 
470 	drm_panel_add(&innolux->base);
471 
472 	mipi_dsi_set_drvdata(dsi, innolux);
473 	innolux->link = dsi;
474 
475 	return 0;
476 }
477 
478 static void innolux_panel_del(struct innolux_panel *innolux)
479 {
480 	drm_panel_remove(&innolux->base);
481 }
482 
483 static int innolux_panel_probe(struct mipi_dsi_device *dsi)
484 {
485 	const struct panel_desc *desc;
486 	struct innolux_panel *innolux;
487 	int err;
488 
489 	desc = of_device_get_match_data(&dsi->dev);
490 	dsi->mode_flags = desc->flags;
491 	dsi->format = desc->format;
492 	dsi->lanes = desc->lanes;
493 
494 	err = innolux_panel_add(dsi, desc);
495 	if (err < 0)
496 		return err;
497 
498 	err = mipi_dsi_attach(dsi);
499 	if (err < 0) {
500 		innolux = mipi_dsi_get_drvdata(dsi);
501 		innolux_panel_del(innolux);
502 		return err;
503 	}
504 
505 	return 0;
506 }
507 
508 static void innolux_panel_remove(struct mipi_dsi_device *dsi)
509 {
510 	struct innolux_panel *innolux = mipi_dsi_get_drvdata(dsi);
511 	int err;
512 
513 	err = drm_panel_unprepare(&innolux->base);
514 	if (err < 0)
515 		dev_err(&dsi->dev, "failed to unprepare panel: %d\n", err);
516 
517 	err = drm_panel_disable(&innolux->base);
518 	if (err < 0)
519 		dev_err(&dsi->dev, "failed to disable panel: %d\n", err);
520 
521 	err = mipi_dsi_detach(dsi);
522 	if (err < 0)
523 		dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", err);
524 
525 	innolux_panel_del(innolux);
526 }
527 
528 static void innolux_panel_shutdown(struct mipi_dsi_device *dsi)
529 {
530 	struct innolux_panel *innolux = mipi_dsi_get_drvdata(dsi);
531 
532 	drm_panel_unprepare(&innolux->base);
533 	drm_panel_disable(&innolux->base);
534 }
535 
536 static struct mipi_dsi_driver innolux_panel_driver = {
537 	.driver = {
538 		.name = "panel-innolux-p079zca",
539 		.of_match_table = innolux_of_match,
540 	},
541 	.probe = innolux_panel_probe,
542 	.remove = innolux_panel_remove,
543 	.shutdown = innolux_panel_shutdown,
544 };
545 module_mipi_dsi_driver(innolux_panel_driver);
546 
547 MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
548 MODULE_AUTHOR("Lin Huang <hl@rock-chips.com>");
549 MODULE_DESCRIPTION("Innolux P079ZCA panel driver");
550 MODULE_LICENSE("GPL v2");
551