xref: /linux/drivers/gpu/drm/panel/panel-edp.c (revision e70140ba0d2b1a30467d4af6bcfe761327b9ec95)
1 /*
2  * Copyright (C) 2013, NVIDIA Corporation.  All rights reserved.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sub license,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice (including the
12  * next paragraph) shall be included in all copies or substantial portions
13  * of the Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21  * DEALINGS IN THE SOFTWARE.
22  */
23 
24 #include <linux/debugfs.h>
25 #include <linux/delay.h>
26 #include <linux/gpio/consumer.h>
27 #include <linux/iopoll.h>
28 #include <linux/module.h>
29 #include <linux/of_platform.h>
30 #include <linux/platform_device.h>
31 #include <linux/pm_runtime.h>
32 #include <linux/regulator/consumer.h>
33 
34 #include <video/display_timing.h>
35 #include <video/of_display_timing.h>
36 #include <video/videomode.h>
37 
38 #include <drm/display/drm_dp_aux_bus.h>
39 #include <drm/display/drm_dp_helper.h>
40 #include <drm/drm_crtc.h>
41 #include <drm/drm_device.h>
42 #include <drm/drm_edid.h>
43 #include <drm/drm_panel.h>
44 
45 /**
46  * struct panel_delay - Describes delays for a simple panel.
47  */
48 struct panel_delay {
49 	/**
50 	 * @hpd_reliable: Time for HPD to be reliable
51 	 *
52 	 * The time (in milliseconds) that it takes after powering the panel
53 	 * before the HPD signal is reliable. Ideally this is 0 but some panels,
54 	 * board designs, or bad pulldown configs can cause a glitch here.
55 	 *
56 	 * NOTE: on some old panel data this number appears to be much too big.
57 	 * Presumably some old panels simply didn't have HPD hooked up and put
58 	 * the hpd_absent here because this field predates the
59 	 * hpd_absent. While that works, it's non-ideal.
60 	 */
61 	unsigned int hpd_reliable;
62 
63 	/**
64 	 * @hpd_absent: Time to wait if HPD isn't hooked up.
65 	 *
66 	 * Add this to the prepare delay if we know Hot Plug Detect isn't used.
67 	 *
68 	 * This is T3-max on eDP timing diagrams or the delay from power on
69 	 * until HPD is guaranteed to be asserted.
70 	 */
71 	unsigned int hpd_absent;
72 
73 	/**
74 	 * @powered_on_to_enable: Time between panel powered on and enable.
75 	 *
76 	 * The minimum time, in milliseconds, that needs to have passed
77 	 * between when panel powered on and enable may begin.
78 	 *
79 	 * This is (T3+T4+T5+T6+T8)-min on eDP timing diagrams or after the
80 	 * power supply enabled until we can turn the backlight on and see
81 	 * valid data.
82 	 *
83 	 * This doesn't normally need to be set if timings are already met by
84 	 * prepare_to_enable or enable.
85 	 */
86 	unsigned int powered_on_to_enable;
87 
88 	/**
89 	 * @prepare_to_enable: Time between prepare and enable.
90 	 *
91 	 * The minimum time, in milliseconds, that needs to have passed
92 	 * between when prepare finished and enable may begin. If at
93 	 * enable time less time has passed since prepare finished,
94 	 * the driver waits for the remaining time.
95 	 *
96 	 * If a fixed enable delay is also specified, we'll start
97 	 * counting before delaying for the fixed delay.
98 	 *
99 	 * If a fixed prepare delay is also specified, we won't start
100 	 * counting until after the fixed delay. We can't overlap this
101 	 * fixed delay with the min time because the fixed delay
102 	 * doesn't happen at the end of the function if a HPD GPIO was
103 	 * specified.
104 	 *
105 	 * In other words:
106 	 *   prepare()
107 	 *     ...
108 	 *     // do fixed prepare delay
109 	 *     // wait for HPD GPIO if applicable
110 	 *     // start counting for prepare_to_enable
111 	 *
112 	 *   enable()
113 	 *     // do fixed enable delay
114 	 *     // enforce prepare_to_enable min time
115 	 *
116 	 * This is not specified in a standard way on eDP timing diagrams.
117 	 * It is effectively the time from HPD going high till you can
118 	 * turn on the backlight.
119 	 */
120 	unsigned int prepare_to_enable;
121 
122 	/**
123 	 * @enable: Time for the panel to display a valid frame.
124 	 *
125 	 * The time (in milliseconds) that it takes for the panel to
126 	 * display the first valid frame after starting to receive
127 	 * video data.
128 	 *
129 	 * This is (T6-min + max(T7-max, T8-min)) on eDP timing diagrams or
130 	 * the delay after link training finishes until we can turn the
131 	 * backlight on and see valid data.
132 	 */
133 	unsigned int enable;
134 
135 	/**
136 	 * @disable: Time for the panel to turn the display off.
137 	 *
138 	 * The time (in milliseconds) that it takes for the panel to
139 	 * turn the display off (no content is visible).
140 	 *
141 	 * This is T9-min (delay from backlight off to end of valid video
142 	 * data) on eDP timing diagrams. It is not common to set.
143 	 */
144 	unsigned int disable;
145 
146 	/**
147 	 * @unprepare: Time to power down completely.
148 	 *
149 	 * The time (in milliseconds) that it takes for the panel
150 	 * to power itself down completely.
151 	 *
152 	 * This time is used to prevent a future "prepare" from
153 	 * starting until at least this many milliseconds has passed.
154 	 * If at prepare time less time has passed since unprepare
155 	 * finished, the driver waits for the remaining time.
156 	 *
157 	 * This is T12-min on eDP timing diagrams.
158 	 */
159 	unsigned int unprepare;
160 };
161 
162 /**
163  * struct panel_desc - Describes a simple panel.
164  */
165 struct panel_desc {
166 	/**
167 	 * @modes: Pointer to array of fixed modes appropriate for this panel.
168 	 *
169 	 * If only one mode then this can just be the address of the mode.
170 	 * NOTE: cannot be used with "timings" and also if this is specified
171 	 * then you cannot override the mode in the device tree.
172 	 */
173 	const struct drm_display_mode *modes;
174 
175 	/** @num_modes: Number of elements in modes array. */
176 	unsigned int num_modes;
177 
178 	/**
179 	 * @timings: Pointer to array of display timings
180 	 *
181 	 * NOTE: cannot be used with "modes" and also these will be used to
182 	 * validate a device tree override if one is present.
183 	 */
184 	const struct display_timing *timings;
185 
186 	/** @num_timings: Number of elements in timings array. */
187 	unsigned int num_timings;
188 
189 	/** @bpc: Bits per color. */
190 	unsigned int bpc;
191 
192 	/** @size: Structure containing the physical size of this panel. */
193 	struct {
194 		/**
195 		 * @size.width: Width (in mm) of the active display area.
196 		 */
197 		unsigned int width;
198 
199 		/**
200 		 * @size.height: Height (in mm) of the active display area.
201 		 */
202 		unsigned int height;
203 	} size;
204 
205 	/** @delay: Structure containing various delay values for this panel. */
206 	struct panel_delay delay;
207 };
208 
209 /**
210  * struct edp_panel_entry - Maps panel ID to delay / panel name.
211  */
212 struct edp_panel_entry {
213 	/** @ident: edid identity used for panel matching. */
214 	const struct drm_edid_ident ident;
215 
216 	/** @delay: The power sequencing delays needed for this panel. */
217 	const struct panel_delay *delay;
218 
219 	/** @override_edid_mode: Override the mode obtained by edid. */
220 	const struct drm_display_mode *override_edid_mode;
221 };
222 
223 struct panel_edp {
224 	struct drm_panel base;
225 	bool no_hpd;
226 
227 	ktime_t prepared_time;
228 	ktime_t powered_on_time;
229 	ktime_t unprepared_time;
230 
231 	const struct panel_desc *desc;
232 
233 	struct regulator *supply;
234 	struct i2c_adapter *ddc;
235 	struct drm_dp_aux *aux;
236 
237 	struct gpio_desc *enable_gpio;
238 	struct gpio_desc *hpd_gpio;
239 
240 	const struct edp_panel_entry *detected_panel;
241 
242 	const struct drm_edid *drm_edid;
243 
244 	struct drm_display_mode override_mode;
245 
246 	enum drm_panel_orientation orientation;
247 };
248 
to_panel_edp(struct drm_panel * panel)249 static inline struct panel_edp *to_panel_edp(struct drm_panel *panel)
250 {
251 	return container_of(panel, struct panel_edp, base);
252 }
253 
panel_edp_get_timings_modes(struct panel_edp * panel,struct drm_connector * connector)254 static unsigned int panel_edp_get_timings_modes(struct panel_edp *panel,
255 						struct drm_connector *connector)
256 {
257 	struct drm_display_mode *mode;
258 	unsigned int i, num = 0;
259 
260 	for (i = 0; i < panel->desc->num_timings; i++) {
261 		const struct display_timing *dt = &panel->desc->timings[i];
262 		struct videomode vm;
263 
264 		videomode_from_timing(dt, &vm);
265 		mode = drm_mode_create(connector->dev);
266 		if (!mode) {
267 			dev_err(panel->base.dev, "failed to add mode %ux%u\n",
268 				dt->hactive.typ, dt->vactive.typ);
269 			continue;
270 		}
271 
272 		drm_display_mode_from_videomode(&vm, mode);
273 
274 		mode->type |= DRM_MODE_TYPE_DRIVER;
275 
276 		if (panel->desc->num_timings == 1)
277 			mode->type |= DRM_MODE_TYPE_PREFERRED;
278 
279 		drm_mode_probed_add(connector, mode);
280 		num++;
281 	}
282 
283 	return num;
284 }
285 
panel_edp_get_display_modes(struct panel_edp * panel,struct drm_connector * connector)286 static unsigned int panel_edp_get_display_modes(struct panel_edp *panel,
287 						struct drm_connector *connector)
288 {
289 	struct drm_display_mode *mode;
290 	unsigned int i, num = 0;
291 
292 	for (i = 0; i < panel->desc->num_modes; i++) {
293 		const struct drm_display_mode *m = &panel->desc->modes[i];
294 
295 		mode = drm_mode_duplicate(connector->dev, m);
296 		if (!mode) {
297 			dev_err(panel->base.dev, "failed to add mode %ux%u@%u\n",
298 				m->hdisplay, m->vdisplay,
299 				drm_mode_vrefresh(m));
300 			continue;
301 		}
302 
303 		mode->type |= DRM_MODE_TYPE_DRIVER;
304 
305 		if (panel->desc->num_modes == 1)
306 			mode->type |= DRM_MODE_TYPE_PREFERRED;
307 
308 		drm_mode_set_name(mode);
309 
310 		drm_mode_probed_add(connector, mode);
311 		num++;
312 	}
313 
314 	return num;
315 }
316 
panel_edp_override_edid_mode(struct panel_edp * panel,struct drm_connector * connector,const struct drm_display_mode * override_mode)317 static int panel_edp_override_edid_mode(struct panel_edp *panel,
318 					struct drm_connector *connector,
319 					const struct drm_display_mode *override_mode)
320 {
321 	struct drm_display_mode *mode;
322 
323 	mode = drm_mode_duplicate(connector->dev, override_mode);
324 	if (!mode) {
325 		dev_err(panel->base.dev, "failed to add additional mode\n");
326 		return 0;
327 	}
328 
329 	mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
330 	drm_mode_set_name(mode);
331 	drm_mode_probed_add(connector, mode);
332 	return 1;
333 }
334 
panel_edp_get_non_edid_modes(struct panel_edp * panel,struct drm_connector * connector)335 static int panel_edp_get_non_edid_modes(struct panel_edp *panel,
336 					struct drm_connector *connector)
337 {
338 	struct drm_display_mode *mode;
339 	bool has_override = panel->override_mode.type;
340 	unsigned int num = 0;
341 
342 	if (!panel->desc)
343 		return 0;
344 
345 	if (has_override) {
346 		mode = drm_mode_duplicate(connector->dev,
347 					  &panel->override_mode);
348 		if (mode) {
349 			drm_mode_probed_add(connector, mode);
350 			num = 1;
351 		} else {
352 			dev_err(panel->base.dev, "failed to add override mode\n");
353 		}
354 	}
355 
356 	/* Only add timings if override was not there or failed to validate */
357 	if (num == 0 && panel->desc->num_timings)
358 		num = panel_edp_get_timings_modes(panel, connector);
359 
360 	/*
361 	 * Only add fixed modes if timings/override added no mode.
362 	 *
363 	 * We should only ever have either the display timings specified
364 	 * or a fixed mode. Anything else is rather bogus.
365 	 */
366 	WARN_ON(panel->desc->num_timings && panel->desc->num_modes);
367 	if (num == 0)
368 		num = panel_edp_get_display_modes(panel, connector);
369 
370 	connector->display_info.bpc = panel->desc->bpc;
371 	connector->display_info.width_mm = panel->desc->size.width;
372 	connector->display_info.height_mm = panel->desc->size.height;
373 
374 	return num;
375 }
376 
panel_edp_wait(ktime_t start_ktime,unsigned int min_ms)377 static void panel_edp_wait(ktime_t start_ktime, unsigned int min_ms)
378 {
379 	ktime_t now_ktime, min_ktime;
380 
381 	if (!min_ms)
382 		return;
383 
384 	min_ktime = ktime_add(start_ktime, ms_to_ktime(min_ms));
385 	now_ktime = ktime_get_boottime();
386 
387 	if (ktime_before(now_ktime, min_ktime))
388 		msleep(ktime_to_ms(ktime_sub(min_ktime, now_ktime)) + 1);
389 }
390 
panel_edp_disable(struct drm_panel * panel)391 static int panel_edp_disable(struct drm_panel *panel)
392 {
393 	struct panel_edp *p = to_panel_edp(panel);
394 
395 	if (p->desc->delay.disable)
396 		msleep(p->desc->delay.disable);
397 
398 	return 0;
399 }
400 
panel_edp_suspend(struct device * dev)401 static int panel_edp_suspend(struct device *dev)
402 {
403 	struct panel_edp *p = dev_get_drvdata(dev);
404 
405 	drm_dp_dpcd_set_powered(p->aux, false);
406 	gpiod_set_value_cansleep(p->enable_gpio, 0);
407 	regulator_disable(p->supply);
408 	p->unprepared_time = ktime_get_boottime();
409 
410 	return 0;
411 }
412 
panel_edp_unprepare(struct drm_panel * panel)413 static int panel_edp_unprepare(struct drm_panel *panel)
414 {
415 	int ret;
416 
417 	ret = pm_runtime_put_sync_suspend(panel->dev);
418 	if (ret < 0)
419 		return ret;
420 
421 	return 0;
422 }
423 
panel_edp_get_hpd_gpio(struct device * dev,struct panel_edp * p)424 static int panel_edp_get_hpd_gpio(struct device *dev, struct panel_edp *p)
425 {
426 	p->hpd_gpio = devm_gpiod_get_optional(dev, "hpd", GPIOD_IN);
427 	if (IS_ERR(p->hpd_gpio))
428 		return dev_err_probe(dev, PTR_ERR(p->hpd_gpio),
429 				     "failed to get 'hpd' GPIO\n");
430 
431 	return 0;
432 }
433 
panel_edp_can_read_hpd(struct panel_edp * p)434 static bool panel_edp_can_read_hpd(struct panel_edp *p)
435 {
436 	return !p->no_hpd && (p->hpd_gpio || (p->aux && p->aux->wait_hpd_asserted));
437 }
438 
panel_edp_prepare_once(struct panel_edp * p)439 static int panel_edp_prepare_once(struct panel_edp *p)
440 {
441 	struct device *dev = p->base.dev;
442 	unsigned int delay;
443 	int err;
444 	int hpd_asserted;
445 	unsigned long hpd_wait_us;
446 
447 	panel_edp_wait(p->unprepared_time, p->desc->delay.unprepare);
448 
449 	err = regulator_enable(p->supply);
450 	if (err < 0) {
451 		dev_err(dev, "failed to enable supply: %d\n", err);
452 		return err;
453 	}
454 
455 	gpiod_set_value_cansleep(p->enable_gpio, 1);
456 	drm_dp_dpcd_set_powered(p->aux, true);
457 
458 	p->powered_on_time = ktime_get_boottime();
459 
460 	delay = p->desc->delay.hpd_reliable;
461 	if (p->no_hpd)
462 		delay = max(delay, p->desc->delay.hpd_absent);
463 	if (delay)
464 		msleep(delay);
465 
466 	if (panel_edp_can_read_hpd(p)) {
467 		if (p->desc->delay.hpd_absent)
468 			hpd_wait_us = p->desc->delay.hpd_absent * 1000UL;
469 		else
470 			hpd_wait_us = 2000000;
471 
472 		if (p->hpd_gpio) {
473 			err = readx_poll_timeout(gpiod_get_value_cansleep,
474 						 p->hpd_gpio, hpd_asserted,
475 						 hpd_asserted, 1000, hpd_wait_us);
476 			if (hpd_asserted < 0)
477 				err = hpd_asserted;
478 		} else {
479 			err = p->aux->wait_hpd_asserted(p->aux, hpd_wait_us);
480 		}
481 
482 		if (err) {
483 			if (err != -ETIMEDOUT)
484 				dev_err(dev,
485 					"error waiting for hpd GPIO: %d\n", err);
486 			goto error;
487 		}
488 	}
489 
490 	p->prepared_time = ktime_get_boottime();
491 
492 	return 0;
493 
494 error:
495 	drm_dp_dpcd_set_powered(p->aux, false);
496 	gpiod_set_value_cansleep(p->enable_gpio, 0);
497 	regulator_disable(p->supply);
498 	p->unprepared_time = ktime_get_boottime();
499 
500 	return err;
501 }
502 
503 /*
504  * Some panels simply don't always come up and need to be power cycled to
505  * work properly.  We'll allow for a handful of retries.
506  */
507 #define MAX_PANEL_PREPARE_TRIES		5
508 
panel_edp_resume(struct device * dev)509 static int panel_edp_resume(struct device *dev)
510 {
511 	struct panel_edp *p = dev_get_drvdata(dev);
512 	int ret;
513 	int try;
514 
515 	for (try = 0; try < MAX_PANEL_PREPARE_TRIES; try++) {
516 		ret = panel_edp_prepare_once(p);
517 		if (ret != -ETIMEDOUT)
518 			break;
519 	}
520 
521 	if (ret == -ETIMEDOUT)
522 		dev_err(dev, "Prepare timeout after %d tries\n", try);
523 	else if (try)
524 		dev_warn(dev, "Prepare needed %d retries\n", try);
525 
526 	return ret;
527 }
528 
panel_edp_prepare(struct drm_panel * panel)529 static int panel_edp_prepare(struct drm_panel *panel)
530 {
531 	int ret;
532 
533 	ret = pm_runtime_get_sync(panel->dev);
534 	if (ret < 0) {
535 		pm_runtime_put_autosuspend(panel->dev);
536 		return ret;
537 	}
538 
539 	return 0;
540 }
541 
panel_edp_enable(struct drm_panel * panel)542 static int panel_edp_enable(struct drm_panel *panel)
543 {
544 	struct panel_edp *p = to_panel_edp(panel);
545 	unsigned int delay;
546 
547 	delay = p->desc->delay.enable;
548 
549 	/*
550 	 * If there is a "prepare_to_enable" delay then that's supposed to be
551 	 * the delay from HPD going high until we can turn the backlight on.
552 	 * However, we can only count this if HPD is readable by the panel
553 	 * driver.
554 	 *
555 	 * If we aren't handling the HPD pin ourselves then the best we
556 	 * can do is assume that HPD went high immediately before we were
557 	 * called (and link training took zero time). Note that "no-hpd"
558 	 * actually counts as handling HPD ourselves since we're doing the
559 	 * worst case delay (in prepare) ourselves.
560 	 *
561 	 * NOTE: if we ever end up in this "if" statement then we're
562 	 * guaranteed that the panel_edp_wait() call below will do no delay.
563 	 * It already handles that case, though, so we don't need any special
564 	 * code for it.
565 	 */
566 	if (p->desc->delay.prepare_to_enable &&
567 	    !panel_edp_can_read_hpd(p) && !p->no_hpd)
568 		delay = max(delay, p->desc->delay.prepare_to_enable);
569 
570 	if (delay)
571 		msleep(delay);
572 
573 	panel_edp_wait(p->prepared_time, p->desc->delay.prepare_to_enable);
574 
575 	panel_edp_wait(p->powered_on_time, p->desc->delay.powered_on_to_enable);
576 
577 	return 0;
578 }
579 
panel_edp_get_modes(struct drm_panel * panel,struct drm_connector * connector)580 static int panel_edp_get_modes(struct drm_panel *panel,
581 			       struct drm_connector *connector)
582 {
583 	struct panel_edp *p = to_panel_edp(panel);
584 	int num = 0;
585 	bool has_hard_coded_modes = p->desc->num_timings || p->desc->num_modes;
586 	bool has_override_edid_mode = p->detected_panel &&
587 				      p->detected_panel != ERR_PTR(-EINVAL) &&
588 				      p->detected_panel->override_edid_mode;
589 
590 	/* probe EDID if a DDC bus is available */
591 	if (p->ddc) {
592 		pm_runtime_get_sync(panel->dev);
593 
594 		if (!p->drm_edid)
595 			p->drm_edid = drm_edid_read_ddc(connector, p->ddc);
596 
597 		drm_edid_connector_update(connector, p->drm_edid);
598 
599 		/*
600 		 * If both edid and hard-coded modes exists, skip edid modes to
601 		 * avoid multiple preferred modes.
602 		 */
603 		if (p->drm_edid && !has_hard_coded_modes) {
604 			if (has_override_edid_mode) {
605 				/*
606 				 * override_edid_mode is specified. Use
607 				 * override_edid_mode instead of from edid.
608 				 */
609 				num += panel_edp_override_edid_mode(p, connector,
610 						p->detected_panel->override_edid_mode);
611 			} else {
612 				num += drm_edid_connector_add_modes(connector);
613 			}
614 		}
615 
616 		pm_runtime_mark_last_busy(panel->dev);
617 		pm_runtime_put_autosuspend(panel->dev);
618 	}
619 
620 	if (has_hard_coded_modes)
621 		num += panel_edp_get_non_edid_modes(p, connector);
622 	else if (!num)
623 		dev_warn(p->base.dev, "No display modes\n");
624 
625 	/*
626 	 * TODO: Remove once all drm drivers call
627 	 * drm_connector_set_orientation_from_panel()
628 	 */
629 	drm_connector_set_panel_orientation(connector, p->orientation);
630 
631 	return num;
632 }
633 
panel_edp_get_timings(struct drm_panel * panel,unsigned int num_timings,struct display_timing * timings)634 static int panel_edp_get_timings(struct drm_panel *panel,
635 				 unsigned int num_timings,
636 				 struct display_timing *timings)
637 {
638 	struct panel_edp *p = to_panel_edp(panel);
639 	unsigned int i;
640 
641 	if (p->desc->num_timings < num_timings)
642 		num_timings = p->desc->num_timings;
643 
644 	if (timings)
645 		for (i = 0; i < num_timings; i++)
646 			timings[i] = p->desc->timings[i];
647 
648 	return p->desc->num_timings;
649 }
650 
panel_edp_get_orientation(struct drm_panel * panel)651 static enum drm_panel_orientation panel_edp_get_orientation(struct drm_panel *panel)
652 {
653 	struct panel_edp *p = to_panel_edp(panel);
654 
655 	return p->orientation;
656 }
657 
detected_panel_show(struct seq_file * s,void * data)658 static int detected_panel_show(struct seq_file *s, void *data)
659 {
660 	struct drm_panel *panel = s->private;
661 	struct panel_edp *p = to_panel_edp(panel);
662 
663 	if (IS_ERR(p->detected_panel))
664 		seq_puts(s, "UNKNOWN\n");
665 	else if (!p->detected_panel)
666 		seq_puts(s, "HARDCODED\n");
667 	else
668 		seq_printf(s, "%s\n", p->detected_panel->ident.name);
669 
670 	return 0;
671 }
672 
673 DEFINE_SHOW_ATTRIBUTE(detected_panel);
674 
panel_edp_debugfs_init(struct drm_panel * panel,struct dentry * root)675 static void panel_edp_debugfs_init(struct drm_panel *panel, struct dentry *root)
676 {
677 	debugfs_create_file("detected_panel", 0600, root, panel, &detected_panel_fops);
678 }
679 
680 static const struct drm_panel_funcs panel_edp_funcs = {
681 	.disable = panel_edp_disable,
682 	.unprepare = panel_edp_unprepare,
683 	.prepare = panel_edp_prepare,
684 	.enable = panel_edp_enable,
685 	.get_modes = panel_edp_get_modes,
686 	.get_orientation = panel_edp_get_orientation,
687 	.get_timings = panel_edp_get_timings,
688 	.debugfs_init = panel_edp_debugfs_init,
689 };
690 
691 #define PANEL_EDP_BOUNDS_CHECK(to_check, bounds, field) \
692 	(to_check->field.typ >= bounds->field.min && \
693 	 to_check->field.typ <= bounds->field.max)
panel_edp_parse_panel_timing_node(struct device * dev,struct panel_edp * panel,const struct display_timing * ot)694 static void panel_edp_parse_panel_timing_node(struct device *dev,
695 					      struct panel_edp *panel,
696 					      const struct display_timing *ot)
697 {
698 	const struct panel_desc *desc = panel->desc;
699 	struct videomode vm;
700 	unsigned int i;
701 
702 	if (WARN_ON(desc->num_modes)) {
703 		dev_err(dev, "Reject override mode: panel has a fixed mode\n");
704 		return;
705 	}
706 	if (WARN_ON(!desc->num_timings)) {
707 		dev_err(dev, "Reject override mode: no timings specified\n");
708 		return;
709 	}
710 
711 	for (i = 0; i < panel->desc->num_timings; i++) {
712 		const struct display_timing *dt = &panel->desc->timings[i];
713 
714 		if (!PANEL_EDP_BOUNDS_CHECK(ot, dt, hactive) ||
715 		    !PANEL_EDP_BOUNDS_CHECK(ot, dt, hfront_porch) ||
716 		    !PANEL_EDP_BOUNDS_CHECK(ot, dt, hback_porch) ||
717 		    !PANEL_EDP_BOUNDS_CHECK(ot, dt, hsync_len) ||
718 		    !PANEL_EDP_BOUNDS_CHECK(ot, dt, vactive) ||
719 		    !PANEL_EDP_BOUNDS_CHECK(ot, dt, vfront_porch) ||
720 		    !PANEL_EDP_BOUNDS_CHECK(ot, dt, vback_porch) ||
721 		    !PANEL_EDP_BOUNDS_CHECK(ot, dt, vsync_len))
722 			continue;
723 
724 		if (ot->flags != dt->flags)
725 			continue;
726 
727 		videomode_from_timing(ot, &vm);
728 		drm_display_mode_from_videomode(&vm, &panel->override_mode);
729 		panel->override_mode.type |= DRM_MODE_TYPE_DRIVER |
730 					     DRM_MODE_TYPE_PREFERRED;
731 		break;
732 	}
733 
734 	if (WARN_ON(!panel->override_mode.type))
735 		dev_err(dev, "Reject override mode: No display_timing found\n");
736 }
737 
738 static const struct edp_panel_entry *find_edp_panel(u32 panel_id, const struct drm_edid *edid);
739 
panel_edp_set_conservative_timings(struct panel_edp * panel,struct panel_desc * desc)740 static void panel_edp_set_conservative_timings(struct panel_edp *panel, struct panel_desc *desc)
741 {
742 	/*
743 	 * It's highly likely that the panel will work if we use very
744 	 * conservative timings, so let's do that.
745 	 *
746 	 * Nearly all panels have a "unprepare" delay of 500 ms though
747 	 * there are a few with 1000. Let's stick 2000 in just to be
748 	 * super conservative.
749 	 *
750 	 * An "enable" delay of 80 ms seems the most common, but we'll
751 	 * throw in 200 ms to be safe.
752 	 */
753 	desc->delay.unprepare = 2000;
754 	desc->delay.enable = 200;
755 
756 	panel->detected_panel = ERR_PTR(-EINVAL);
757 }
758 
generic_edp_panel_probe(struct device * dev,struct panel_edp * panel)759 static int generic_edp_panel_probe(struct device *dev, struct panel_edp *panel)
760 {
761 	struct panel_desc *desc;
762 	const struct drm_edid *base_block;
763 	u32 panel_id;
764 	char vend[4];
765 	u16 product_id;
766 	u32 reliable_ms = 0;
767 	u32 absent_ms = 0;
768 	int ret;
769 
770 	desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
771 	if (!desc)
772 		return -ENOMEM;
773 	panel->desc = desc;
774 
775 	/*
776 	 * Read the dts properties for the initial probe. These are used by
777 	 * the runtime resume code which will get called by the
778 	 * pm_runtime_get_sync() call below.
779 	 */
780 	of_property_read_u32(dev->of_node, "hpd-reliable-delay-ms", &reliable_ms);
781 	desc->delay.hpd_reliable = reliable_ms;
782 	of_property_read_u32(dev->of_node, "hpd-absent-delay-ms", &absent_ms);
783 	desc->delay.hpd_absent = absent_ms;
784 
785 	/* Power the panel on so we can read the EDID */
786 	ret = pm_runtime_get_sync(dev);
787 	if (ret < 0) {
788 		dev_err(dev,
789 			"Couldn't power on panel to ID it; using conservative timings: %d\n",
790 			ret);
791 		panel_edp_set_conservative_timings(panel, desc);
792 		goto exit;
793 	}
794 
795 	base_block = drm_edid_read_base_block(panel->ddc);
796 	if (base_block) {
797 		panel_id = drm_edid_get_panel_id(base_block);
798 	} else {
799 		dev_err(dev, "Couldn't read EDID for ID; using conservative timings\n");
800 		panel_edp_set_conservative_timings(panel, desc);
801 		goto exit;
802 	}
803 	drm_edid_decode_panel_id(panel_id, vend, &product_id);
804 
805 	panel->detected_panel = find_edp_panel(panel_id, base_block);
806 
807 	drm_edid_free(base_block);
808 
809 	/*
810 	 * We're using non-optimized timings and want it really obvious that
811 	 * someone needs to add an entry to the table, so we'll do a WARN_ON
812 	 * splat.
813 	 */
814 	if (WARN_ON(!panel->detected_panel)) {
815 		dev_warn(dev,
816 			 "Unknown panel %s %#06x, using conservative timings\n",
817 			 vend, product_id);
818 		panel_edp_set_conservative_timings(panel, desc);
819 	} else {
820 		dev_info(dev, "Detected %s %s (%#06x)\n",
821 			 vend, panel->detected_panel->ident.name, product_id);
822 
823 		/* Update the delay; everything else comes from EDID */
824 		desc->delay = *panel->detected_panel->delay;
825 	}
826 
827 exit:
828 	pm_runtime_mark_last_busy(dev);
829 	pm_runtime_put_autosuspend(dev);
830 
831 	return 0;
832 }
833 
panel_edp_probe(struct device * dev,const struct panel_desc * desc,struct drm_dp_aux * aux)834 static int panel_edp_probe(struct device *dev, const struct panel_desc *desc,
835 			   struct drm_dp_aux *aux)
836 {
837 	struct panel_edp *panel;
838 	struct display_timing dt;
839 	struct device_node *ddc;
840 	int err;
841 
842 	panel = devm_kzalloc(dev, sizeof(*panel), GFP_KERNEL);
843 	if (!panel)
844 		return -ENOMEM;
845 
846 	panel->prepared_time = 0;
847 	panel->desc = desc;
848 	panel->aux = aux;
849 
850 	panel->no_hpd = of_property_read_bool(dev->of_node, "no-hpd");
851 	if (!panel->no_hpd) {
852 		err = panel_edp_get_hpd_gpio(dev, panel);
853 		if (err)
854 			return err;
855 	}
856 
857 	panel->supply = devm_regulator_get(dev, "power");
858 	if (IS_ERR(panel->supply))
859 		return PTR_ERR(panel->supply);
860 
861 	panel->enable_gpio = devm_gpiod_get_optional(dev, "enable",
862 						     GPIOD_OUT_LOW);
863 	if (IS_ERR(panel->enable_gpio))
864 		return dev_err_probe(dev, PTR_ERR(panel->enable_gpio),
865 				     "failed to request GPIO\n");
866 
867 	err = of_drm_get_panel_orientation(dev->of_node, &panel->orientation);
868 	if (err) {
869 		dev_err(dev, "%pOF: failed to get orientation %d\n", dev->of_node, err);
870 		return err;
871 	}
872 
873 	ddc = of_parse_phandle(dev->of_node, "ddc-i2c-bus", 0);
874 	if (ddc) {
875 		panel->ddc = of_find_i2c_adapter_by_node(ddc);
876 		of_node_put(ddc);
877 
878 		if (!panel->ddc)
879 			return -EPROBE_DEFER;
880 	} else if (aux) {
881 		panel->ddc = &aux->ddc;
882 	}
883 
884 	if (!of_get_display_timing(dev->of_node, "panel-timing", &dt))
885 		panel_edp_parse_panel_timing_node(dev, panel, &dt);
886 
887 	dev_set_drvdata(dev, panel);
888 
889 	drm_panel_init(&panel->base, dev, &panel_edp_funcs, DRM_MODE_CONNECTOR_eDP);
890 
891 	err = drm_panel_of_backlight(&panel->base);
892 	if (err)
893 		goto err_finished_ddc_init;
894 
895 	/*
896 	 * We use runtime PM for prepare / unprepare since those power the panel
897 	 * on and off and those can be very slow operations. This is important
898 	 * to optimize powering the panel on briefly to read the EDID before
899 	 * fully enabling the panel.
900 	 */
901 	pm_runtime_enable(dev);
902 	pm_runtime_set_autosuspend_delay(dev, 1000);
903 	pm_runtime_use_autosuspend(dev);
904 
905 	if (of_device_is_compatible(dev->of_node, "edp-panel")) {
906 		err = generic_edp_panel_probe(dev, panel);
907 		if (err) {
908 			dev_err_probe(dev, err,
909 				      "Couldn't detect panel nor find a fallback\n");
910 			goto err_finished_pm_runtime;
911 		}
912 		/* generic_edp_panel_probe() replaces desc in the panel */
913 		desc = panel->desc;
914 	} else if (desc->bpc != 6 && desc->bpc != 8 && desc->bpc != 10) {
915 		dev_warn(dev, "Expected bpc in {6,8,10} but got: %u\n", desc->bpc);
916 	}
917 
918 	if (!panel->base.backlight && panel->aux) {
919 		pm_runtime_get_sync(dev);
920 		err = drm_panel_dp_aux_backlight(&panel->base, panel->aux);
921 		pm_runtime_mark_last_busy(dev);
922 		pm_runtime_put_autosuspend(dev);
923 
924 		/*
925 		 * Warn if we get an error, but don't consider it fatal. Having
926 		 * a panel where we can't control the backlight is better than
927 		 * no panel.
928 		 */
929 		if (err)
930 			dev_warn(dev, "failed to register dp aux backlight: %d\n", err);
931 	}
932 
933 	drm_panel_add(&panel->base);
934 
935 	return 0;
936 
937 err_finished_pm_runtime:
938 	pm_runtime_dont_use_autosuspend(dev);
939 	pm_runtime_disable(dev);
940 err_finished_ddc_init:
941 	if (panel->ddc && (!panel->aux || panel->ddc != &panel->aux->ddc))
942 		put_device(&panel->ddc->dev);
943 
944 	return err;
945 }
946 
panel_edp_shutdown(struct device * dev)947 static void panel_edp_shutdown(struct device *dev)
948 {
949 	struct panel_edp *panel = dev_get_drvdata(dev);
950 
951 	/*
952 	 * NOTE: the following two calls don't really belong here. It is the
953 	 * responsibility of a correctly written DRM modeset driver to call
954 	 * drm_atomic_helper_shutdown() at shutdown time and that should
955 	 * cause the panel to be disabled / unprepared if needed. For now,
956 	 * however, we'll keep these calls due to the sheer number of
957 	 * different DRM modeset drivers used with panel-edp. Once we've
958 	 * confirmed that all DRM modeset drivers using this panel properly
959 	 * call drm_atomic_helper_shutdown() we can simply delete the two
960 	 * calls below.
961 	 *
962 	 * TO BE EXPLICIT: THE CALLS BELOW SHOULDN'T BE COPIED TO ANY NEW
963 	 * PANEL DRIVERS.
964 	 *
965 	 * FIXME: If we're still haven't figured out if all DRM modeset
966 	 * drivers properly call drm_atomic_helper_shutdown() but we _have_
967 	 * managed to make sure that DRM modeset drivers get their shutdown()
968 	 * callback before the panel's shutdown() callback (perhaps using
969 	 * device link), we could add a WARN_ON here to help move forward.
970 	 */
971 	if (panel->base.enabled)
972 		drm_panel_disable(&panel->base);
973 	if (panel->base.prepared)
974 		drm_panel_unprepare(&panel->base);
975 }
976 
panel_edp_remove(struct device * dev)977 static void panel_edp_remove(struct device *dev)
978 {
979 	struct panel_edp *panel = dev_get_drvdata(dev);
980 
981 	drm_panel_remove(&panel->base);
982 	panel_edp_shutdown(dev);
983 
984 	pm_runtime_dont_use_autosuspend(dev);
985 	pm_runtime_disable(dev);
986 	if (panel->ddc && (!panel->aux || panel->ddc != &panel->aux->ddc))
987 		put_device(&panel->ddc->dev);
988 
989 	drm_edid_free(panel->drm_edid);
990 	panel->drm_edid = NULL;
991 }
992 
993 static const struct display_timing auo_b101ean01_timing = {
994 	.pixelclock = { 65300000, 72500000, 75000000 },
995 	.hactive = { 1280, 1280, 1280 },
996 	.hfront_porch = { 18, 119, 119 },
997 	.hback_porch = { 21, 21, 21 },
998 	.hsync_len = { 32, 32, 32 },
999 	.vactive = { 800, 800, 800 },
1000 	.vfront_porch = { 4, 4, 4 },
1001 	.vback_porch = { 8, 8, 8 },
1002 	.vsync_len = { 18, 20, 20 },
1003 };
1004 
1005 static const struct panel_desc auo_b101ean01 = {
1006 	.timings = &auo_b101ean01_timing,
1007 	.num_timings = 1,
1008 	.bpc = 6,
1009 	.size = {
1010 		.width = 217,
1011 		.height = 136,
1012 	},
1013 };
1014 
1015 static const struct drm_display_mode auo_b116xa3_mode = {
1016 	.clock = 70589,
1017 	.hdisplay = 1366,
1018 	.hsync_start = 1366 + 40,
1019 	.hsync_end = 1366 + 40 + 40,
1020 	.htotal = 1366 + 40 + 40 + 32,
1021 	.vdisplay = 768,
1022 	.vsync_start = 768 + 10,
1023 	.vsync_end = 768 + 10 + 12,
1024 	.vtotal = 768 + 10 + 12 + 6,
1025 	.flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
1026 };
1027 
1028 static const struct drm_display_mode auo_b116xak01_mode = {
1029 	.clock = 69300,
1030 	.hdisplay = 1366,
1031 	.hsync_start = 1366 + 48,
1032 	.hsync_end = 1366 + 48 + 32,
1033 	.htotal = 1366 + 48 + 32 + 10,
1034 	.vdisplay = 768,
1035 	.vsync_start = 768 + 4,
1036 	.vsync_end = 768 + 4 + 6,
1037 	.vtotal = 768 + 4 + 6 + 15,
1038 	.flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
1039 };
1040 
1041 static const struct panel_desc auo_b116xak01 = {
1042 	.modes = &auo_b116xak01_mode,
1043 	.num_modes = 1,
1044 	.bpc = 6,
1045 	.size = {
1046 		.width = 256,
1047 		.height = 144,
1048 	},
1049 	.delay = {
1050 		.hpd_absent = 200,
1051 		.unprepare = 500,
1052 		.enable = 50,
1053 	},
1054 };
1055 
1056 static const struct drm_display_mode auo_b133htn01_mode = {
1057 	.clock = 150660,
1058 	.hdisplay = 1920,
1059 	.hsync_start = 1920 + 172,
1060 	.hsync_end = 1920 + 172 + 80,
1061 	.htotal = 1920 + 172 + 80 + 60,
1062 	.vdisplay = 1080,
1063 	.vsync_start = 1080 + 25,
1064 	.vsync_end = 1080 + 25 + 10,
1065 	.vtotal = 1080 + 25 + 10 + 10,
1066 };
1067 
1068 static const struct panel_desc auo_b133htn01 = {
1069 	.modes = &auo_b133htn01_mode,
1070 	.num_modes = 1,
1071 	.bpc = 6,
1072 	.size = {
1073 		.width = 293,
1074 		.height = 165,
1075 	},
1076 	.delay = {
1077 		.hpd_reliable = 105,
1078 		.enable = 20,
1079 		.unprepare = 50,
1080 	},
1081 };
1082 
1083 static const struct drm_display_mode auo_b133xtn01_mode = {
1084 	.clock = 69500,
1085 	.hdisplay = 1366,
1086 	.hsync_start = 1366 + 48,
1087 	.hsync_end = 1366 + 48 + 32,
1088 	.htotal = 1366 + 48 + 32 + 20,
1089 	.vdisplay = 768,
1090 	.vsync_start = 768 + 3,
1091 	.vsync_end = 768 + 3 + 6,
1092 	.vtotal = 768 + 3 + 6 + 13,
1093 };
1094 
1095 static const struct panel_desc auo_b133xtn01 = {
1096 	.modes = &auo_b133xtn01_mode,
1097 	.num_modes = 1,
1098 	.bpc = 6,
1099 	.size = {
1100 		.width = 293,
1101 		.height = 165,
1102 	},
1103 };
1104 
1105 static const struct drm_display_mode boe_nv101wxmn51_modes[] = {
1106 	{
1107 		.clock = 71900,
1108 		.hdisplay = 1280,
1109 		.hsync_start = 1280 + 48,
1110 		.hsync_end = 1280 + 48 + 32,
1111 		.htotal = 1280 + 48 + 32 + 80,
1112 		.vdisplay = 800,
1113 		.vsync_start = 800 + 3,
1114 		.vsync_end = 800 + 3 + 5,
1115 		.vtotal = 800 + 3 + 5 + 24,
1116 	},
1117 	{
1118 		.clock = 57500,
1119 		.hdisplay = 1280,
1120 		.hsync_start = 1280 + 48,
1121 		.hsync_end = 1280 + 48 + 32,
1122 		.htotal = 1280 + 48 + 32 + 80,
1123 		.vdisplay = 800,
1124 		.vsync_start = 800 + 3,
1125 		.vsync_end = 800 + 3 + 5,
1126 		.vtotal = 800 + 3 + 5 + 24,
1127 	},
1128 };
1129 
1130 static const struct panel_desc boe_nv101wxmn51 = {
1131 	.modes = boe_nv101wxmn51_modes,
1132 	.num_modes = ARRAY_SIZE(boe_nv101wxmn51_modes),
1133 	.bpc = 8,
1134 	.size = {
1135 		.width = 217,
1136 		.height = 136,
1137 	},
1138 	.delay = {
1139 		/* TODO: should be hpd-absent and no-hpd should be set? */
1140 		.hpd_reliable = 210,
1141 		.enable = 50,
1142 		.unprepare = 160,
1143 	},
1144 };
1145 
1146 static const struct drm_display_mode boe_nv110wtm_n61_modes[] = {
1147 	{
1148 		.clock = 207800,
1149 		.hdisplay = 2160,
1150 		.hsync_start = 2160 + 48,
1151 		.hsync_end = 2160 + 48 + 32,
1152 		.htotal = 2160 + 48 + 32 + 100,
1153 		.vdisplay = 1440,
1154 		.vsync_start = 1440 + 3,
1155 		.vsync_end = 1440 + 3 + 6,
1156 		.vtotal = 1440 + 3 + 6 + 31,
1157 		.flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC,
1158 	},
1159 	{
1160 		.clock = 138500,
1161 		.hdisplay = 2160,
1162 		.hsync_start = 2160 + 48,
1163 		.hsync_end = 2160 + 48 + 32,
1164 		.htotal = 2160 + 48 + 32 + 100,
1165 		.vdisplay = 1440,
1166 		.vsync_start = 1440 + 3,
1167 		.vsync_end = 1440 + 3 + 6,
1168 		.vtotal = 1440 + 3 + 6 + 31,
1169 		.flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC,
1170 	},
1171 };
1172 
1173 static const struct panel_desc boe_nv110wtm_n61 = {
1174 	.modes = boe_nv110wtm_n61_modes,
1175 	.num_modes = ARRAY_SIZE(boe_nv110wtm_n61_modes),
1176 	.bpc = 8,
1177 	.size = {
1178 		.width = 233,
1179 		.height = 155,
1180 	},
1181 	.delay = {
1182 		.hpd_absent = 200,
1183 		.prepare_to_enable = 80,
1184 		.enable = 50,
1185 		.unprepare = 500,
1186 	},
1187 };
1188 
1189 /* Also used for boe_nv133fhm_n62 */
1190 static const struct drm_display_mode boe_nv133fhm_n61_modes = {
1191 	.clock = 147840,
1192 	.hdisplay = 1920,
1193 	.hsync_start = 1920 + 48,
1194 	.hsync_end = 1920 + 48 + 32,
1195 	.htotal = 1920 + 48 + 32 + 200,
1196 	.vdisplay = 1080,
1197 	.vsync_start = 1080 + 3,
1198 	.vsync_end = 1080 + 3 + 6,
1199 	.vtotal = 1080 + 3 + 6 + 31,
1200 	.flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC,
1201 };
1202 
1203 /* Also used for boe_nv133fhm_n62 */
1204 static const struct panel_desc boe_nv133fhm_n61 = {
1205 	.modes = &boe_nv133fhm_n61_modes,
1206 	.num_modes = 1,
1207 	.bpc = 6,
1208 	.size = {
1209 		.width = 294,
1210 		.height = 165,
1211 	},
1212 	.delay = {
1213 		/*
1214 		 * When power is first given to the panel there's a short
1215 		 * spike on the HPD line.  It was explained that this spike
1216 		 * was until the TCON data download was complete.  On
1217 		 * one system this was measured at 8 ms.  We'll put 15 ms
1218 		 * in the prepare delay just to be safe.  That means:
1219 		 * - If HPD isn't hooked up you still have 200 ms delay.
1220 		 * - If HPD is hooked up we won't try to look at it for the
1221 		 *   first 15 ms.
1222 		 */
1223 		.hpd_reliable = 15,
1224 		.hpd_absent = 200,
1225 
1226 		.unprepare = 500,
1227 	},
1228 };
1229 
1230 static const struct drm_display_mode boe_nv140fhmn49_modes[] = {
1231 	{
1232 		.clock = 148500,
1233 		.hdisplay = 1920,
1234 		.hsync_start = 1920 + 48,
1235 		.hsync_end = 1920 + 48 + 32,
1236 		.htotal = 2200,
1237 		.vdisplay = 1080,
1238 		.vsync_start = 1080 + 3,
1239 		.vsync_end = 1080 + 3 + 5,
1240 		.vtotal = 1125,
1241 	},
1242 };
1243 
1244 static const struct panel_desc boe_nv140fhmn49 = {
1245 	.modes = boe_nv140fhmn49_modes,
1246 	.num_modes = ARRAY_SIZE(boe_nv140fhmn49_modes),
1247 	.bpc = 6,
1248 	.size = {
1249 		.width = 309,
1250 		.height = 174,
1251 	},
1252 	.delay = {
1253 		/* TODO: should be hpd-absent and no-hpd should be set? */
1254 		.hpd_reliable = 210,
1255 		.enable = 50,
1256 		.unprepare = 160,
1257 	},
1258 };
1259 
1260 static const struct drm_display_mode innolux_n116bca_ea1_mode = {
1261 	.clock = 76420,
1262 	.hdisplay = 1366,
1263 	.hsync_start = 1366 + 136,
1264 	.hsync_end = 1366 + 136 + 30,
1265 	.htotal = 1366 + 136 + 30 + 60,
1266 	.vdisplay = 768,
1267 	.vsync_start = 768 + 8,
1268 	.vsync_end = 768 + 8 + 12,
1269 	.vtotal = 768 + 8 + 12 + 12,
1270 	.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
1271 };
1272 
1273 static const struct panel_desc innolux_n116bca_ea1 = {
1274 	.modes = &innolux_n116bca_ea1_mode,
1275 	.num_modes = 1,
1276 	.bpc = 6,
1277 	.size = {
1278 		.width = 256,
1279 		.height = 144,
1280 	},
1281 	.delay = {
1282 		.hpd_absent = 200,
1283 		.enable = 80,
1284 		.disable = 50,
1285 		.unprepare = 500,
1286 	},
1287 };
1288 
1289 /*
1290  * Datasheet specifies that at 60 Hz refresh rate:
1291  * - total horizontal time: { 1506, 1592, 1716 }
1292  * - total vertical time: { 788, 800, 868 }
1293  *
1294  * ...but doesn't go into exactly how that should be split into a front
1295  * porch, back porch, or sync length.  For now we'll leave a single setting
1296  * here which allows a bit of tweaking of the pixel clock at the expense of
1297  * refresh rate.
1298  */
1299 static const struct display_timing innolux_n116bge_timing = {
1300 	.pixelclock = { 72600000, 76420000, 80240000 },
1301 	.hactive = { 1366, 1366, 1366 },
1302 	.hfront_porch = { 136, 136, 136 },
1303 	.hback_porch = { 60, 60, 60 },
1304 	.hsync_len = { 30, 30, 30 },
1305 	.vactive = { 768, 768, 768 },
1306 	.vfront_porch = { 8, 8, 8 },
1307 	.vback_porch = { 12, 12, 12 },
1308 	.vsync_len = { 12, 12, 12 },
1309 	.flags = DISPLAY_FLAGS_VSYNC_LOW | DISPLAY_FLAGS_HSYNC_LOW,
1310 };
1311 
1312 static const struct panel_desc innolux_n116bge = {
1313 	.timings = &innolux_n116bge_timing,
1314 	.num_timings = 1,
1315 	.bpc = 6,
1316 	.size = {
1317 		.width = 256,
1318 		.height = 144,
1319 	},
1320 };
1321 
1322 static const struct drm_display_mode innolux_n125hce_gn1_mode = {
1323 	.clock = 162000,
1324 	.hdisplay = 1920,
1325 	.hsync_start = 1920 + 40,
1326 	.hsync_end = 1920 + 40 + 40,
1327 	.htotal = 1920 + 40 + 40 + 80,
1328 	.vdisplay = 1080,
1329 	.vsync_start = 1080 + 4,
1330 	.vsync_end = 1080 + 4 + 4,
1331 	.vtotal = 1080 + 4 + 4 + 24,
1332 };
1333 
1334 static const struct panel_desc innolux_n125hce_gn1 = {
1335 	.modes = &innolux_n125hce_gn1_mode,
1336 	.num_modes = 1,
1337 	.bpc = 8,
1338 	.size = {
1339 		.width = 276,
1340 		.height = 155,
1341 	},
1342 };
1343 
1344 static const struct drm_display_mode innolux_p120zdg_bf1_mode = {
1345 	.clock = 206016,
1346 	.hdisplay = 2160,
1347 	.hsync_start = 2160 + 48,
1348 	.hsync_end = 2160 + 48 + 32,
1349 	.htotal = 2160 + 48 + 32 + 80,
1350 	.vdisplay = 1440,
1351 	.vsync_start = 1440 + 3,
1352 	.vsync_end = 1440 + 3 + 10,
1353 	.vtotal = 1440 + 3 + 10 + 27,
1354 	.flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC,
1355 };
1356 
1357 static const struct panel_desc innolux_p120zdg_bf1 = {
1358 	.modes = &innolux_p120zdg_bf1_mode,
1359 	.num_modes = 1,
1360 	.bpc = 8,
1361 	.size = {
1362 		.width = 254,
1363 		.height = 169,
1364 	},
1365 	.delay = {
1366 		.hpd_absent = 200,
1367 		.unprepare = 500,
1368 	},
1369 };
1370 
1371 static const struct drm_display_mode kingdisplay_kd116n21_30nv_a010_mode = {
1372 	.clock = 81000,
1373 	.hdisplay = 1366,
1374 	.hsync_start = 1366 + 40,
1375 	.hsync_end = 1366 + 40 + 32,
1376 	.htotal = 1366 + 40 + 32 + 62,
1377 	.vdisplay = 768,
1378 	.vsync_start = 768 + 5,
1379 	.vsync_end = 768 + 5 + 5,
1380 	.vtotal = 768 + 5 + 5 + 122,
1381 	.flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
1382 };
1383 
1384 static const struct panel_desc kingdisplay_kd116n21_30nv_a010 = {
1385 	.modes = &kingdisplay_kd116n21_30nv_a010_mode,
1386 	.num_modes = 1,
1387 	.bpc = 6,
1388 	.size = {
1389 		.width = 256,
1390 		.height = 144,
1391 	},
1392 	.delay = {
1393 		.hpd_absent = 200,
1394 	},
1395 };
1396 
1397 static const struct drm_display_mode lg_lp079qx1_sp0v_mode = {
1398 	.clock = 200000,
1399 	.hdisplay = 1536,
1400 	.hsync_start = 1536 + 12,
1401 	.hsync_end = 1536 + 12 + 16,
1402 	.htotal = 1536 + 12 + 16 + 48,
1403 	.vdisplay = 2048,
1404 	.vsync_start = 2048 + 8,
1405 	.vsync_end = 2048 + 8 + 4,
1406 	.vtotal = 2048 + 8 + 4 + 8,
1407 	.flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
1408 };
1409 
1410 static const struct panel_desc lg_lp079qx1_sp0v = {
1411 	.modes = &lg_lp079qx1_sp0v_mode,
1412 	.num_modes = 1,
1413 	.size = {
1414 		.width = 129,
1415 		.height = 171,
1416 	},
1417 };
1418 
1419 static const struct drm_display_mode lg_lp097qx1_spa1_mode = {
1420 	.clock = 205210,
1421 	.hdisplay = 2048,
1422 	.hsync_start = 2048 + 150,
1423 	.hsync_end = 2048 + 150 + 5,
1424 	.htotal = 2048 + 150 + 5 + 5,
1425 	.vdisplay = 1536,
1426 	.vsync_start = 1536 + 3,
1427 	.vsync_end = 1536 + 3 + 1,
1428 	.vtotal = 1536 + 3 + 1 + 9,
1429 };
1430 
1431 static const struct panel_desc lg_lp097qx1_spa1 = {
1432 	.modes = &lg_lp097qx1_spa1_mode,
1433 	.num_modes = 1,
1434 	.size = {
1435 		.width = 208,
1436 		.height = 147,
1437 	},
1438 };
1439 
1440 static const struct drm_display_mode lg_lp120up1_mode = {
1441 	.clock = 162300,
1442 	.hdisplay = 1920,
1443 	.hsync_start = 1920 + 40,
1444 	.hsync_end = 1920 + 40 + 40,
1445 	.htotal = 1920 + 40 + 40 + 80,
1446 	.vdisplay = 1280,
1447 	.vsync_start = 1280 + 4,
1448 	.vsync_end = 1280 + 4 + 4,
1449 	.vtotal = 1280 + 4 + 4 + 12,
1450 };
1451 
1452 static const struct panel_desc lg_lp120up1 = {
1453 	.modes = &lg_lp120up1_mode,
1454 	.num_modes = 1,
1455 	.bpc = 8,
1456 	.size = {
1457 		.width = 267,
1458 		.height = 183,
1459 	},
1460 };
1461 
1462 static const struct drm_display_mode lg_lp129qe_mode = {
1463 	.clock = 285250,
1464 	.hdisplay = 2560,
1465 	.hsync_start = 2560 + 48,
1466 	.hsync_end = 2560 + 48 + 32,
1467 	.htotal = 2560 + 48 + 32 + 80,
1468 	.vdisplay = 1700,
1469 	.vsync_start = 1700 + 3,
1470 	.vsync_end = 1700 + 3 + 10,
1471 	.vtotal = 1700 + 3 + 10 + 36,
1472 };
1473 
1474 static const struct panel_desc lg_lp129qe = {
1475 	.modes = &lg_lp129qe_mode,
1476 	.num_modes = 1,
1477 	.bpc = 8,
1478 	.size = {
1479 		.width = 272,
1480 		.height = 181,
1481 	},
1482 };
1483 
1484 static const struct drm_display_mode neweast_wjfh116008a_modes[] = {
1485 	{
1486 		.clock = 138500,
1487 		.hdisplay = 1920,
1488 		.hsync_start = 1920 + 48,
1489 		.hsync_end = 1920 + 48 + 32,
1490 		.htotal = 1920 + 48 + 32 + 80,
1491 		.vdisplay = 1080,
1492 		.vsync_start = 1080 + 3,
1493 		.vsync_end = 1080 + 3 + 5,
1494 		.vtotal = 1080 + 3 + 5 + 23,
1495 		.flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
1496 	}, {
1497 		.clock = 110920,
1498 		.hdisplay = 1920,
1499 		.hsync_start = 1920 + 48,
1500 		.hsync_end = 1920 + 48 + 32,
1501 		.htotal = 1920 + 48 + 32 + 80,
1502 		.vdisplay = 1080,
1503 		.vsync_start = 1080 + 3,
1504 		.vsync_end = 1080 + 3 + 5,
1505 		.vtotal = 1080 + 3 + 5 + 23,
1506 		.flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
1507 	}
1508 };
1509 
1510 static const struct panel_desc neweast_wjfh116008a = {
1511 	.modes = neweast_wjfh116008a_modes,
1512 	.num_modes = 2,
1513 	.bpc = 6,
1514 	.size = {
1515 		.width = 260,
1516 		.height = 150,
1517 	},
1518 	.delay = {
1519 		.hpd_reliable = 110,
1520 		.enable = 20,
1521 		.unprepare = 500,
1522 	},
1523 };
1524 
1525 static const struct drm_display_mode samsung_lsn122dl01_c01_mode = {
1526 	.clock = 271560,
1527 	.hdisplay = 2560,
1528 	.hsync_start = 2560 + 48,
1529 	.hsync_end = 2560 + 48 + 32,
1530 	.htotal = 2560 + 48 + 32 + 80,
1531 	.vdisplay = 1600,
1532 	.vsync_start = 1600 + 2,
1533 	.vsync_end = 1600 + 2 + 5,
1534 	.vtotal = 1600 + 2 + 5 + 57,
1535 };
1536 
1537 static const struct panel_desc samsung_lsn122dl01_c01 = {
1538 	.modes = &samsung_lsn122dl01_c01_mode,
1539 	.num_modes = 1,
1540 	.size = {
1541 		.width = 263,
1542 		.height = 164,
1543 	},
1544 };
1545 
1546 static const struct drm_display_mode samsung_ltn140at29_301_mode = {
1547 	.clock = 76300,
1548 	.hdisplay = 1366,
1549 	.hsync_start = 1366 + 64,
1550 	.hsync_end = 1366 + 64 + 48,
1551 	.htotal = 1366 + 64 + 48 + 128,
1552 	.vdisplay = 768,
1553 	.vsync_start = 768 + 2,
1554 	.vsync_end = 768 + 2 + 5,
1555 	.vtotal = 768 + 2 + 5 + 17,
1556 };
1557 
1558 static const struct panel_desc samsung_ltn140at29_301 = {
1559 	.modes = &samsung_ltn140at29_301_mode,
1560 	.num_modes = 1,
1561 	.bpc = 6,
1562 	.size = {
1563 		.width = 320,
1564 		.height = 187,
1565 	},
1566 };
1567 
1568 static const struct drm_display_mode sharp_ld_d5116z01b_mode = {
1569 	.clock = 168480,
1570 	.hdisplay = 1920,
1571 	.hsync_start = 1920 + 48,
1572 	.hsync_end = 1920 + 48 + 32,
1573 	.htotal = 1920 + 48 + 32 + 80,
1574 	.vdisplay = 1280,
1575 	.vsync_start = 1280 + 3,
1576 	.vsync_end = 1280 + 3 + 10,
1577 	.vtotal = 1280 + 3 + 10 + 57,
1578 	.flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC,
1579 };
1580 
1581 static const struct panel_desc sharp_ld_d5116z01b = {
1582 	.modes = &sharp_ld_d5116z01b_mode,
1583 	.num_modes = 1,
1584 	.bpc = 8,
1585 	.size = {
1586 		.width = 260,
1587 		.height = 120,
1588 	},
1589 };
1590 
1591 static const struct display_timing sharp_lq123p1jx31_timing = {
1592 	.pixelclock = { 252750000, 252750000, 266604720 },
1593 	.hactive = { 2400, 2400, 2400 },
1594 	.hfront_porch = { 48, 48, 48 },
1595 	.hback_porch = { 80, 80, 84 },
1596 	.hsync_len = { 32, 32, 32 },
1597 	.vactive = { 1600, 1600, 1600 },
1598 	.vfront_porch = { 3, 3, 3 },
1599 	.vback_porch = { 33, 33, 120 },
1600 	.vsync_len = { 10, 10, 10 },
1601 	.flags = DISPLAY_FLAGS_VSYNC_LOW | DISPLAY_FLAGS_HSYNC_LOW,
1602 };
1603 
1604 static const struct panel_desc sharp_lq123p1jx31 = {
1605 	.timings = &sharp_lq123p1jx31_timing,
1606 	.num_timings = 1,
1607 	.bpc = 8,
1608 	.size = {
1609 		.width = 259,
1610 		.height = 173,
1611 	},
1612 	.delay = {
1613 		.hpd_reliable = 110,
1614 		.enable = 50,
1615 		.unprepare = 550,
1616 	},
1617 };
1618 
1619 static const struct of_device_id platform_of_match[] = {
1620 	{
1621 		/* Must be first */
1622 		.compatible = "edp-panel",
1623 	},
1624 	/*
1625 	 * Do not add panels to the list below unless they cannot be handled by
1626 	 * the generic edp-panel compatible.
1627 	 *
1628 	 * The only two valid reasons are:
1629 	 * - Because of the panel issues (e.g. broken EDID or broken
1630 	 *   identification).
1631 	 * - Because the eDP drivers didn't wire up the AUX bus properly.
1632 	 *   NOTE that, though this is a marginally valid reason,
1633 	 *   some justification needs to be made for why the platform can't
1634 	 *   wire up the AUX bus properly.
1635 	 *
1636 	 * In all other cases the platform should use the aux-bus and declare
1637 	 * the panel using the 'edp-panel' compatible as a device on the AUX
1638 	 * bus.
1639 	 */
1640 	{
1641 		.compatible = "auo,b101ean01",
1642 		.data = &auo_b101ean01,
1643 	}, {
1644 		.compatible = "auo,b116xa01",
1645 		.data = &auo_b116xak01,
1646 	}, {
1647 		.compatible = "auo,b133htn01",
1648 		.data = &auo_b133htn01,
1649 	}, {
1650 		.compatible = "auo,b133xtn01",
1651 		.data = &auo_b133xtn01,
1652 	}, {
1653 		.compatible = "boe,nv101wxmn51",
1654 		.data = &boe_nv101wxmn51,
1655 	}, {
1656 		.compatible = "boe,nv110wtm-n61",
1657 		.data = &boe_nv110wtm_n61,
1658 	}, {
1659 		.compatible = "boe,nv133fhm-n61",
1660 		.data = &boe_nv133fhm_n61,
1661 	}, {
1662 		.compatible = "boe,nv133fhm-n62",
1663 		.data = &boe_nv133fhm_n61,
1664 	}, {
1665 		.compatible = "boe,nv140fhmn49",
1666 		.data = &boe_nv140fhmn49,
1667 	}, {
1668 		.compatible = "innolux,n116bca-ea1",
1669 		.data = &innolux_n116bca_ea1,
1670 	}, {
1671 		.compatible = "innolux,n116bge",
1672 		.data = &innolux_n116bge,
1673 	}, {
1674 		.compatible = "innolux,n125hce-gn1",
1675 		.data = &innolux_n125hce_gn1,
1676 	}, {
1677 		.compatible = "innolux,p120zdg-bf1",
1678 		.data = &innolux_p120zdg_bf1,
1679 	}, {
1680 		.compatible = "kingdisplay,kd116n21-30nv-a010",
1681 		.data = &kingdisplay_kd116n21_30nv_a010,
1682 	}, {
1683 		.compatible = "lg,lp079qx1-sp0v",
1684 		.data = &lg_lp079qx1_sp0v,
1685 	}, {
1686 		.compatible = "lg,lp097qx1-spa1",
1687 		.data = &lg_lp097qx1_spa1,
1688 	}, {
1689 		.compatible = "lg,lp120up1",
1690 		.data = &lg_lp120up1,
1691 	}, {
1692 		.compatible = "lg,lp129qe",
1693 		.data = &lg_lp129qe,
1694 	}, {
1695 		.compatible = "neweast,wjfh116008a",
1696 		.data = &neweast_wjfh116008a,
1697 	}, {
1698 		.compatible = "samsung,lsn122dl01-c01",
1699 		.data = &samsung_lsn122dl01_c01,
1700 	}, {
1701 		.compatible = "samsung,ltn140at29-301",
1702 		.data = &samsung_ltn140at29_301,
1703 	}, {
1704 		.compatible = "sharp,ld-d5116z01b",
1705 		.data = &sharp_ld_d5116z01b,
1706 	}, {
1707 		.compatible = "sharp,lq123p1jx31",
1708 		.data = &sharp_lq123p1jx31,
1709 	}, {
1710 		/* sentinel */
1711 	}
1712 };
1713 MODULE_DEVICE_TABLE(of, platform_of_match);
1714 
1715 static const struct panel_delay delay_200_500_p2e80 = {
1716 	.hpd_absent = 200,
1717 	.unprepare = 500,
1718 	.prepare_to_enable = 80,
1719 };
1720 
1721 static const struct panel_delay delay_200_500_e50_p2e80 = {
1722 	.hpd_absent = 200,
1723 	.unprepare = 500,
1724 	.enable = 50,
1725 	.prepare_to_enable = 80,
1726 };
1727 
1728 static const struct panel_delay delay_200_500_p2e100 = {
1729 	.hpd_absent = 200,
1730 	.unprepare = 500,
1731 	.prepare_to_enable = 100,
1732 };
1733 
1734 static const struct panel_delay delay_200_500_e50 = {
1735 	.hpd_absent = 200,
1736 	.unprepare = 500,
1737 	.enable = 50,
1738 };
1739 
1740 static const struct panel_delay delay_200_500_e50_p2e200 = {
1741 	.hpd_absent = 200,
1742 	.unprepare = 500,
1743 	.enable = 50,
1744 	.prepare_to_enable = 200,
1745 };
1746 
1747 static const struct panel_delay delay_200_500_e80 = {
1748 	.hpd_absent = 200,
1749 	.unprepare = 500,
1750 	.enable = 80,
1751 };
1752 
1753 static const struct panel_delay delay_200_500_e80_d50 = {
1754 	.hpd_absent = 200,
1755 	.unprepare = 500,
1756 	.enable = 80,
1757 	.disable = 50,
1758 };
1759 
1760 static const struct panel_delay delay_80_500_e50 = {
1761 	.hpd_absent = 80,
1762 	.unprepare = 500,
1763 	.enable = 50,
1764 };
1765 
1766 static const struct panel_delay delay_100_500_e200 = {
1767 	.hpd_absent = 100,
1768 	.unprepare = 500,
1769 	.enable = 200,
1770 };
1771 
1772 static const struct panel_delay delay_200_500_e200 = {
1773 	.hpd_absent = 200,
1774 	.unprepare = 500,
1775 	.enable = 200,
1776 };
1777 
1778 static const struct panel_delay delay_200_500_e200_d200 = {
1779 	.hpd_absent = 200,
1780 	.unprepare = 500,
1781 	.enable = 200,
1782 	.disable = 200,
1783 };
1784 
1785 static const struct panel_delay delay_200_500_e200_d10 = {
1786 	.hpd_absent = 200,
1787 	.unprepare = 500,
1788 	.enable = 200,
1789 	.disable = 10,
1790 };
1791 
1792 static const struct panel_delay delay_200_150_e200 = {
1793 	.hpd_absent = 200,
1794 	.unprepare = 150,
1795 	.enable = 200,
1796 };
1797 
1798 static const struct panel_delay delay_200_500_e50_po2e200 = {
1799 	.hpd_absent = 200,
1800 	.unprepare = 500,
1801 	.enable = 50,
1802 	.powered_on_to_enable = 200,
1803 };
1804 
1805 #define EDP_PANEL_ENTRY(vend_chr_0, vend_chr_1, vend_chr_2, product_id, _delay, _name) \
1806 { \
1807 	.ident = { \
1808 		.name = _name, \
1809 		.panel_id = drm_edid_encode_panel_id(vend_chr_0, vend_chr_1, vend_chr_2, \
1810 						     product_id), \
1811 	}, \
1812 	.delay = _delay \
1813 }
1814 
1815 #define EDP_PANEL_ENTRY2(vend_chr_0, vend_chr_1, vend_chr_2, product_id, _delay, _name, _mode) \
1816 { \
1817 	.ident = { \
1818 		.name = _name, \
1819 		.panel_id = drm_edid_encode_panel_id(vend_chr_0, vend_chr_1, vend_chr_2, \
1820 						     product_id), \
1821 	}, \
1822 	.delay = _delay, \
1823 	.override_edid_mode = _mode \
1824 }
1825 
1826 /*
1827  * This table is used to figure out power sequencing delays for panels that
1828  * are detected by EDID. Entries here may point to entries in the
1829  * platform_of_match table (if a panel is listed in both places).
1830  *
1831  * Sort first by vendor, then by product ID.
1832  */
1833 static const struct edp_panel_entry edp_panels[] = {
1834 	EDP_PANEL_ENTRY('A', 'U', 'O', 0x105c, &delay_200_500_e50, "B116XTN01.0"),
1835 	EDP_PANEL_ENTRY('A', 'U', 'O', 0x1062, &delay_200_500_e50, "B120XAN01.0"),
1836 	EDP_PANEL_ENTRY('A', 'U', 'O', 0x125c, &delay_200_500_e50, "Unknown"),
1837 	EDP_PANEL_ENTRY('A', 'U', 'O', 0x145c, &delay_200_500_e50, "B116XAB01.4"),
1838 	EDP_PANEL_ENTRY('A', 'U', 'O', 0x1999, &delay_200_500_e50, "Unknown"),
1839 	EDP_PANEL_ENTRY('A', 'U', 'O', 0x1e9b, &delay_200_500_e50, "B133UAN02.1"),
1840 	EDP_PANEL_ENTRY('A', 'U', 'O', 0x1ea5, &delay_200_500_e50, "B116XAK01.6"),
1841 	EDP_PANEL_ENTRY('A', 'U', 'O', 0x203d, &delay_200_500_e50, "B140HTN02.0"),
1842 	EDP_PANEL_ENTRY('A', 'U', 'O', 0x208d, &delay_200_500_e50, "B140HTN02.1"),
1843 	EDP_PANEL_ENTRY('A', 'U', 'O', 0x235c, &delay_200_500_e50, "B116XTN02.3"),
1844 	EDP_PANEL_ENTRY('A', 'U', 'O', 0x239b, &delay_200_500_e50, "B116XAN06.1"),
1845 	EDP_PANEL_ENTRY('A', 'U', 'O', 0x255c, &delay_200_500_e50, "B116XTN02.5"),
1846 	EDP_PANEL_ENTRY('A', 'U', 'O', 0x403d, &delay_200_500_e50, "B140HAN04.0"),
1847 	EDP_PANEL_ENTRY('A', 'U', 'O', 0x405c, &auo_b116xak01.delay, "B116XAN04.0"),
1848 	EDP_PANEL_ENTRY2('A', 'U', 'O', 0x405c, &auo_b116xak01.delay, "B116XAK01.0",
1849 			 &auo_b116xa3_mode),
1850 	EDP_PANEL_ENTRY('A', 'U', 'O', 0x435c, &delay_200_500_e50, "Unknown"),
1851 	EDP_PANEL_ENTRY('A', 'U', 'O', 0x582d, &delay_200_500_e50, "B133UAN01.0"),
1852 	EDP_PANEL_ENTRY('A', 'U', 'O', 0x615c, &delay_200_500_e50, "B116XAN06.1"),
1853 	EDP_PANEL_ENTRY('A', 'U', 'O', 0x635c, &delay_200_500_e50, "B116XAN06.3"),
1854 	EDP_PANEL_ENTRY('A', 'U', 'O', 0x639c, &delay_200_500_e50, "B140HAK02.7"),
1855 	EDP_PANEL_ENTRY('A', 'U', 'O', 0x723c, &delay_200_500_e50, "B140XTN07.2"),
1856 	EDP_PANEL_ENTRY('A', 'U', 'O', 0x73aa, &delay_200_500_e50, "B116XTN02.3"),
1857 	EDP_PANEL_ENTRY('A', 'U', 'O', 0x8594, &delay_200_500_e50, "B133UAN01.0"),
1858 	EDP_PANEL_ENTRY('A', 'U', 'O', 0xa199, &delay_200_500_e50, "B116XAN06.1"),
1859 	EDP_PANEL_ENTRY('A', 'U', 'O', 0xc4b4, &delay_200_500_e50, "B116XAT04.1"),
1860 	EDP_PANEL_ENTRY('A', 'U', 'O', 0xd497, &delay_200_500_e50, "B120XAN01.0"),
1861 	EDP_PANEL_ENTRY('A', 'U', 'O', 0xf390, &delay_200_500_e50, "B140XTN07.7"),
1862 
1863 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0607, &delay_200_500_e200, "Unknown"),
1864 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0608, &delay_200_500_e50, "NT116WHM-N11"),
1865 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0609, &delay_200_500_e50_po2e200, "NT116WHM-N21 V4.1"),
1866 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0623, &delay_200_500_e200, "NT116WHM-N21 V4.0"),
1867 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0668, &delay_200_500_e200, "Unknown"),
1868 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x068f, &delay_200_500_e200, "Unknown"),
1869 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x06e5, &delay_200_500_e200, "Unknown"),
1870 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0705, &delay_200_500_e200, "Unknown"),
1871 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0715, &delay_200_150_e200, "NT116WHM-N21"),
1872 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0717, &delay_200_500_e50_po2e200, "NV133FHM-N42"),
1873 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0731, &delay_200_500_e80, "NT116WHM-N42"),
1874 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0741, &delay_200_500_e200, "NT116WHM-N44"),
1875 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0744, &delay_200_500_e200, "Unknown"),
1876 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x074c, &delay_200_500_e200, "Unknown"),
1877 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0751, &delay_200_500_e200, "Unknown"),
1878 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0754, &delay_200_500_e50_po2e200, "NV116WHM-N45"),
1879 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0771, &delay_200_500_e200, "Unknown"),
1880 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0786, &delay_200_500_p2e80, "NV116WHM-T01"),
1881 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0797, &delay_200_500_e200, "Unknown"),
1882 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x07a8, &delay_200_500_e50_po2e200, "NT116WHM-N21"),
1883 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x07d1, &boe_nv133fhm_n61.delay, "NV133FHM-N61"),
1884 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x07d3, &delay_200_500_e200, "Unknown"),
1885 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x07f6, &delay_200_500_e200, "NT140FHM-N44"),
1886 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x07f8, &delay_200_500_e200, "Unknown"),
1887 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0813, &delay_200_500_e200, "Unknown"),
1888 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0827, &delay_200_500_e50_p2e80, "NT140WHM-N44 V8.0"),
1889 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x082d, &boe_nv133fhm_n61.delay, "NV133FHM-N62"),
1890 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0843, &delay_200_500_e200, "Unknown"),
1891 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x08b2, &delay_200_500_e200, "NT140WHM-N49"),
1892 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0848, &delay_200_500_e200, "Unknown"),
1893 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0849, &delay_200_500_e200, "Unknown"),
1894 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x09c3, &delay_200_500_e50, "NT116WHM-N21,836X2"),
1895 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x094b, &delay_200_500_e50, "NT116WHM-N21"),
1896 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0951, &delay_200_500_e80, "NV116WHM-N47"),
1897 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x095f, &delay_200_500_e50, "NE135FBM-N41 v8.1"),
1898 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x096e, &delay_200_500_e50_po2e200, "NV116WHM-T07 V8.0"),
1899 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0979, &delay_200_500_e50, "NV116WHM-N49 V8.0"),
1900 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x098d, &boe_nv110wtm_n61.delay, "NV110WTM-N61"),
1901 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0993, &delay_200_500_e80, "NV116WHM-T14 V8.0"),
1902 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x09ad, &delay_200_500_e80, "NV116WHM-N47"),
1903 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x09ae, &delay_200_500_e200, "NT140FHM-N45"),
1904 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x09dd, &delay_200_500_e50, "NT116WHM-N21"),
1905 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0a1b, &delay_200_500_e50, "NV133WUM-N63"),
1906 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0a36, &delay_200_500_e200, "Unknown"),
1907 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0a3e, &delay_200_500_e80, "NV116WHM-N49"),
1908 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0a5d, &delay_200_500_e50, "NV116WHM-N45"),
1909 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0ac5, &delay_200_500_e50, "NV116WHM-N4C"),
1910 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0ae8, &delay_200_500_e50_p2e80, "NV140WUM-N41"),
1911 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0b34, &delay_200_500_e80, "NV122WUM-N41"),
1912 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0b43, &delay_200_500_e200, "NV140FHM-T09"),
1913 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0b56, &delay_200_500_e80, "NT140FHM-N47"),
1914 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0b66, &delay_200_500_e80, "NE140WUM-N6G"),
1915 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0c20, &delay_200_500_e80, "NT140FHM-N47"),
1916 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0cb6, &delay_200_500_e200, "NT116WHM-N44"),
1917 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0cfa, &delay_200_500_e50, "NV116WHM-A4D"),
1918 
1919 	EDP_PANEL_ENTRY('C', 'M', 'N', 0x1130, &delay_200_500_e50, "N116BGE-EB2"),
1920 	EDP_PANEL_ENTRY('C', 'M', 'N', 0x1132, &delay_200_500_e80_d50, "N116BGE-EA2"),
1921 	EDP_PANEL_ENTRY('C', 'M', 'N', 0x1138, &innolux_n116bca_ea1.delay, "N116BCA-EA1-RC4"),
1922 	EDP_PANEL_ENTRY('C', 'M', 'N', 0x1139, &delay_200_500_e80_d50, "N116BGE-EA2"),
1923 	EDP_PANEL_ENTRY('C', 'M', 'N', 0x1141, &delay_200_500_e80_d50, "Unknown"),
1924 	EDP_PANEL_ENTRY('C', 'M', 'N', 0x1145, &delay_200_500_e80_d50, "N116BCN-EB1"),
1925 	EDP_PANEL_ENTRY('C', 'M', 'N', 0x114a, &delay_200_500_e80_d50, "Unknown"),
1926 	EDP_PANEL_ENTRY('C', 'M', 'N', 0x114c, &innolux_n116bca_ea1.delay, "N116BCA-EA1"),
1927 	EDP_PANEL_ENTRY('C', 'M', 'N', 0x1152, &delay_200_500_e80_d50, "N116BCN-EA1"),
1928 	EDP_PANEL_ENTRY('C', 'M', 'N', 0x1153, &delay_200_500_e80_d50, "N116BGE-EA2"),
1929 	EDP_PANEL_ENTRY('C', 'M', 'N', 0x1154, &delay_200_500_e80_d50, "N116BCA-EA2"),
1930 	EDP_PANEL_ENTRY('C', 'M', 'N', 0x1156, &delay_200_500_e80_d50, "Unknown"),
1931 	EDP_PANEL_ENTRY('C', 'M', 'N', 0x1157, &delay_200_500_e80_d50, "N116BGE-EA2"),
1932 	EDP_PANEL_ENTRY('C', 'M', 'N', 0x115b, &delay_200_500_e80_d50, "N116BCN-EB1"),
1933 	EDP_PANEL_ENTRY('C', 'M', 'N', 0x115d, &delay_200_500_e80_d50, "N116BCA-EA2"),
1934 	EDP_PANEL_ENTRY('C', 'M', 'N', 0x115e, &delay_200_500_e80_d50, "N116BCA-EA1"),
1935 	EDP_PANEL_ENTRY('C', 'M', 'N', 0x1160, &delay_200_500_e80_d50, "N116BCJ-EAK"),
1936 	EDP_PANEL_ENTRY('C', 'M', 'N', 0x1161, &delay_200_500_e80, "N116BCP-EA2"),
1937 	EDP_PANEL_ENTRY('C', 'M', 'N', 0x1247, &delay_200_500_e80_d50, "N120ACA-EA1"),
1938 	EDP_PANEL_ENTRY('C', 'M', 'N', 0x142b, &delay_200_500_e80_d50, "N140HCA-EAC"),
1939 	EDP_PANEL_ENTRY('C', 'M', 'N', 0x142e, &delay_200_500_e80_d50, "N140BGA-EA4"),
1940 	EDP_PANEL_ENTRY('C', 'M', 'N', 0x144f, &delay_200_500_e80_d50, "N140HGA-EA1"),
1941 	EDP_PANEL_ENTRY('C', 'M', 'N', 0x1468, &delay_200_500_e80, "N140HGA-EA1"),
1942 	EDP_PANEL_ENTRY('C', 'M', 'N', 0x14d4, &delay_200_500_e80_d50, "N140HCA-EAC"),
1943 	EDP_PANEL_ENTRY('C', 'M', 'N', 0x14d6, &delay_200_500_e80_d50, "N140BGA-EA4"),
1944 	EDP_PANEL_ENTRY('C', 'M', 'N', 0x14e5, &delay_200_500_e80_d50, "N140HGA-EA1"),
1945 
1946 	EDP_PANEL_ENTRY('C', 'S', 'O', 0x1200, &delay_200_500_e50_p2e200, "MNC207QS1-1"),
1947 
1948 	EDP_PANEL_ENTRY('C', 'S', 'W', 0x1100, &delay_200_500_e80_d50, "MNB601LS1-1"),
1949 	EDP_PANEL_ENTRY('C', 'S', 'W', 0x1104, &delay_200_500_e50, "MNB601LS1-4"),
1950 
1951 	EDP_PANEL_ENTRY('H', 'K', 'C', 0x2d51, &delay_200_500_e200, "Unknown"),
1952 	EDP_PANEL_ENTRY('H', 'K', 'C', 0x2d5b, &delay_200_500_e200, "MB116AN01"),
1953 	EDP_PANEL_ENTRY('H', 'K', 'C', 0x2d5c, &delay_200_500_e200, "MB116AN01-2"),
1954 
1955 	EDP_PANEL_ENTRY('I', 'V', 'O', 0x048e, &delay_200_500_e200_d10, "M116NWR6 R5"),
1956 	EDP_PANEL_ENTRY('I', 'V', 'O', 0x057d, &delay_200_500_e200, "R140NWF5 RH"),
1957 	EDP_PANEL_ENTRY('I', 'V', 'O', 0x854a, &delay_200_500_p2e100, "M133NW4J"),
1958 	EDP_PANEL_ENTRY('I', 'V', 'O', 0x854b, &delay_200_500_p2e100, "R133NW4K-R0"),
1959 	EDP_PANEL_ENTRY('I', 'V', 'O', 0x8c4d, &delay_200_150_e200, "R140NWFM R1"),
1960 
1961 	EDP_PANEL_ENTRY('K', 'D', 'B', 0x044f, &delay_200_500_e80_d50, "Unknown"),
1962 	EDP_PANEL_ENTRY('K', 'D', 'B', 0x0624, &kingdisplay_kd116n21_30nv_a010.delay, "116N21-30NV-A010"),
1963 	EDP_PANEL_ENTRY('K', 'D', 'B', 0x1118, &delay_200_500_e50, "KD116N29-30NK-A005"),
1964 	EDP_PANEL_ENTRY('K', 'D', 'B', 0x1120, &delay_200_500_e80_d50, "116N29-30NK-C007"),
1965 	EDP_PANEL_ENTRY('K', 'D', 'B', 0x1212, &delay_200_500_e50, "KD116N0930A16"),
1966 
1967 	EDP_PANEL_ENTRY('K', 'D', 'C', 0x044f, &delay_200_500_e50, "KD116N9-30NH-F3"),
1968 	EDP_PANEL_ENTRY('K', 'D', 'C', 0x05f1, &delay_200_500_e80_d50, "KD116N5-30NV-G7"),
1969 	EDP_PANEL_ENTRY('K', 'D', 'C', 0x0809, &delay_200_500_e50, "KD116N2930A15"),
1970 
1971 	EDP_PANEL_ENTRY('L', 'G', 'D', 0x0000, &delay_200_500_e200_d200, "Unknown"),
1972 	EDP_PANEL_ENTRY('L', 'G', 'D', 0x048d, &delay_200_500_e200_d200, "Unknown"),
1973 	EDP_PANEL_ENTRY('L', 'G', 'D', 0x0497, &delay_200_500_e200_d200, "LP116WH7-SPB1"),
1974 	EDP_PANEL_ENTRY('L', 'G', 'D', 0x052c, &delay_200_500_e200_d200, "LP133WF2-SPL7"),
1975 	EDP_PANEL_ENTRY('L', 'G', 'D', 0x0537, &delay_200_500_e200_d200, "Unknown"),
1976 	EDP_PANEL_ENTRY('L', 'G', 'D', 0x054a, &delay_200_500_e200_d200, "LP116WH8-SPC1"),
1977 	EDP_PANEL_ENTRY('L', 'G', 'D', 0x0567, &delay_200_500_e200_d200, "Unknown"),
1978 	EDP_PANEL_ENTRY('L', 'G', 'D', 0x05af, &delay_200_500_e200_d200, "Unknown"),
1979 	EDP_PANEL_ENTRY('L', 'G', 'D', 0x05f1, &delay_200_500_e200_d200, "Unknown"),
1980 	EDP_PANEL_ENTRY('L', 'G', 'D', 0x0778, &delay_200_500_e200_d200, "134WT1"),
1981 
1982 	EDP_PANEL_ENTRY('S', 'H', 'P', 0x1511, &delay_200_500_e50, "LQ140M1JW48"),
1983 	EDP_PANEL_ENTRY('S', 'H', 'P', 0x1523, &delay_80_500_e50, "LQ140M1JW46"),
1984 	EDP_PANEL_ENTRY('S', 'H', 'P', 0x153a, &delay_200_500_e50, "LQ140T1JH01"),
1985 	EDP_PANEL_ENTRY('S', 'H', 'P', 0x154c, &delay_200_500_p2e100, "LQ116M1JW10"),
1986 	EDP_PANEL_ENTRY('S', 'H', 'P', 0x1593, &delay_200_500_p2e100, "LQ134N1"),
1987 
1988 	EDP_PANEL_ENTRY('S', 'T', 'A', 0x0100, &delay_100_500_e200, "2081116HHD028001-51D"),
1989 
1990 	{ /* sentinal */ }
1991 };
1992 
find_edp_panel(u32 panel_id,const struct drm_edid * edid)1993 static const struct edp_panel_entry *find_edp_panel(u32 panel_id, const struct drm_edid *edid)
1994 {
1995 	const struct edp_panel_entry *panel;
1996 
1997 	if (!panel_id)
1998 		return NULL;
1999 
2000 	/*
2001 	 * Match with identity first. This allows handling the case where
2002 	 * vendors incorrectly reused the same panel ID for multiple panels that
2003 	 * need different settings. If there's no match, try again with panel
2004 	 * ID, which should be unique.
2005 	 */
2006 	for (panel = edp_panels; panel->ident.panel_id; panel++)
2007 		if (drm_edid_match(edid, &panel->ident))
2008 			return panel;
2009 
2010 	for (panel = edp_panels; panel->ident.panel_id; panel++)
2011 		if (panel->ident.panel_id == panel_id)
2012 			return panel;
2013 
2014 	return NULL;
2015 }
2016 
panel_edp_platform_probe(struct platform_device * pdev)2017 static int panel_edp_platform_probe(struct platform_device *pdev)
2018 {
2019 	const struct of_device_id *id;
2020 
2021 	/* Skip one since "edp-panel" is only supported on DP AUX bus */
2022 	id = of_match_node(platform_of_match + 1, pdev->dev.of_node);
2023 	if (!id)
2024 		return -ENODEV;
2025 
2026 	return panel_edp_probe(&pdev->dev, id->data, NULL);
2027 }
2028 
panel_edp_platform_remove(struct platform_device * pdev)2029 static void panel_edp_platform_remove(struct platform_device *pdev)
2030 {
2031 	panel_edp_remove(&pdev->dev);
2032 }
2033 
panel_edp_platform_shutdown(struct platform_device * pdev)2034 static void panel_edp_platform_shutdown(struct platform_device *pdev)
2035 {
2036 	panel_edp_shutdown(&pdev->dev);
2037 }
2038 
2039 static const struct dev_pm_ops panel_edp_pm_ops = {
2040 	SET_RUNTIME_PM_OPS(panel_edp_suspend, panel_edp_resume, NULL)
2041 	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
2042 				pm_runtime_force_resume)
2043 };
2044 
2045 static struct platform_driver panel_edp_platform_driver = {
2046 	.driver = {
2047 		.name = "panel-edp",
2048 		.of_match_table = platform_of_match,
2049 		.pm = &panel_edp_pm_ops,
2050 	},
2051 	.probe = panel_edp_platform_probe,
2052 	.remove = panel_edp_platform_remove,
2053 	.shutdown = panel_edp_platform_shutdown,
2054 };
2055 
panel_edp_dp_aux_ep_probe(struct dp_aux_ep_device * aux_ep)2056 static int panel_edp_dp_aux_ep_probe(struct dp_aux_ep_device *aux_ep)
2057 {
2058 	const struct of_device_id *id;
2059 
2060 	id = of_match_node(platform_of_match, aux_ep->dev.of_node);
2061 	if (!id)
2062 		return -ENODEV;
2063 
2064 	return panel_edp_probe(&aux_ep->dev, id->data, aux_ep->aux);
2065 }
2066 
panel_edp_dp_aux_ep_remove(struct dp_aux_ep_device * aux_ep)2067 static void panel_edp_dp_aux_ep_remove(struct dp_aux_ep_device *aux_ep)
2068 {
2069 	panel_edp_remove(&aux_ep->dev);
2070 }
2071 
panel_edp_dp_aux_ep_shutdown(struct dp_aux_ep_device * aux_ep)2072 static void panel_edp_dp_aux_ep_shutdown(struct dp_aux_ep_device *aux_ep)
2073 {
2074 	panel_edp_shutdown(&aux_ep->dev);
2075 }
2076 
2077 static struct dp_aux_ep_driver panel_edp_dp_aux_ep_driver = {
2078 	.driver = {
2079 		.name = "panel-simple-dp-aux",
2080 		.of_match_table = platform_of_match,	/* Same as platform one! */
2081 		.pm = &panel_edp_pm_ops,
2082 	},
2083 	.probe = panel_edp_dp_aux_ep_probe,
2084 	.remove = panel_edp_dp_aux_ep_remove,
2085 	.shutdown = panel_edp_dp_aux_ep_shutdown,
2086 };
2087 
panel_edp_init(void)2088 static int __init panel_edp_init(void)
2089 {
2090 	int err;
2091 
2092 	err = platform_driver_register(&panel_edp_platform_driver);
2093 	if (err < 0)
2094 		return err;
2095 
2096 	err = dp_aux_dp_driver_register(&panel_edp_dp_aux_ep_driver);
2097 	if (err < 0)
2098 		goto err_did_platform_register;
2099 
2100 	return 0;
2101 
2102 err_did_platform_register:
2103 	platform_driver_unregister(&panel_edp_platform_driver);
2104 
2105 	return err;
2106 }
2107 module_init(panel_edp_init);
2108 
panel_edp_exit(void)2109 static void __exit panel_edp_exit(void)
2110 {
2111 	dp_aux_dp_driver_unregister(&panel_edp_dp_aux_ep_driver);
2112 	platform_driver_unregister(&panel_edp_platform_driver);
2113 }
2114 module_exit(panel_edp_exit);
2115 
2116 MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>");
2117 MODULE_DESCRIPTION("DRM Driver for Simple eDP Panels");
2118 MODULE_LICENSE("GPL and additional rights");
2119