17  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
34 #include <video/display_timing.h>
35 #include <video/of_display_timing.h>
36 #include <video/videomode.h>
46  * struct panel_delay - Describes delays for a simple panel.
59 	 * hpd_absent. While that works, it's non-ideal.
68 	 * This is T3-max on eDP timing diagrams or the delay from power on
99 	 *     // enforce prepare_to_enable min time
112 	 * video data.
114 	 * This is (T6-min + max(T7-max, T8-min)) on eDP timing diagrams or
126 	 * This is T9-min (delay from backlight off to end of valid video
142 	 * This is T12-min on eDP timing diagrams.
148  * struct panel_desc - Describes a simple panel.
154 	 * If only one mode then this can just be the address of the mode.
156 	 * then you cannot override the mode in the device tree.
195  * struct edp_panel_entry - Maps panel ID to delay / panel name.
198 	/** @panel_id: 32-bit ID for panel, encoded with drm_edid_encode_panel_id(). */
244 	struct drm_display_mode *mode;  in panel_edp_get_timings_modes()  local
247 	for (i = 0; i < panel->desc->num_timings; i++) {  in panel_edp_get_timings_modes()
248 		const struct display_timing *dt = &panel->desc->timings[i];  in panel_edp_get_timings_modes()
252 		mode = drm_mode_create(connector->dev);  in panel_edp_get_timings_modes()
253 		if (!mode) {  in panel_edp_get_timings_modes()
254 			dev_err(panel->base.dev, "failed to add mode %ux%u\n",  in panel_edp_get_timings_modes()
255 				dt->hactive.typ, dt->vactive.typ);  in panel_edp_get_timings_modes()
259 		drm_display_mode_from_videomode(&vm, mode);  in panel_edp_get_timings_modes()
261 		mode->type |= DRM_MODE_TYPE_DRIVER;  in panel_edp_get_timings_modes()
263 		if (panel->desc->num_timings == 1)  in panel_edp_get_timings_modes()
264 			mode->type |= DRM_MODE_TYPE_PREFERRED;  in panel_edp_get_timings_modes()
266 		drm_mode_probed_add(connector, mode);  in panel_edp_get_timings_modes()
276 	struct drm_display_mode *mode;  in panel_edp_get_display_modes()  local
279 	for (i = 0; i < panel->desc->num_modes; i++) {  in panel_edp_get_display_modes()
280 		const struct drm_display_mode *m = &panel->desc->modes[i];  in panel_edp_get_display_modes()
282 		mode = drm_mode_duplicate(connector->dev, m);  in panel_edp_get_display_modes()
283 		if (!mode) {  in panel_edp_get_display_modes()
284 			dev_err(panel->base.dev, "failed to add mode %ux%u@%u\n",  in panel_edp_get_display_modes()
285 				m->hdisplay, m->vdisplay,  in panel_edp_get_display_modes()
290 		mode->type |= DRM_MODE_TYPE_DRIVER;  in panel_edp_get_display_modes()
292 		if (panel->desc->num_modes == 1)  in panel_edp_get_display_modes()
293 			mode->type |= DRM_MODE_TYPE_PREFERRED;  in panel_edp_get_display_modes()
295 		drm_mode_set_name(mode);  in panel_edp_get_display_modes()
297 		drm_mode_probed_add(connector, mode);  in panel_edp_get_display_modes()
307 	struct drm_display_mode *mode;  in panel_edp_get_non_edid_modes()  local
308 	bool has_override = panel->override_mode.type;  in panel_edp_get_non_edid_modes()
311 	if (!panel->desc)  in panel_edp_get_non_edid_modes()
315 		mode = drm_mode_duplicate(connector->dev,  in panel_edp_get_non_edid_modes()
316 					  &panel->override_mode);  in panel_edp_get_non_edid_modes()
317 		if (mode) {  in panel_edp_get_non_edid_modes()
318 			drm_mode_probed_add(connector, mode);  in panel_edp_get_non_edid_modes()
321 			dev_err(panel->base.dev, "failed to add override mode\n");  in panel_edp_get_non_edid_modes()
326 	if (num == 0 && panel->desc->num_timings)  in panel_edp_get_non_edid_modes()
330 	 * Only add fixed modes if timings/override added no mode.  in panel_edp_get_non_edid_modes()
333 	 * or a fixed mode. Anything else is rather bogus.  in panel_edp_get_non_edid_modes()
335 	WARN_ON(panel->desc->num_timings && panel->desc->num_modes);  in panel_edp_get_non_edid_modes()
339 	connector->display_info.bpc = panel->desc->bpc;  in panel_edp_get_non_edid_modes()
340 	connector->display_info.width_mm = panel->desc->size.width;  in panel_edp_get_non_edid_modes()
341 	connector->display_info.height_mm = panel->desc->size.height;  in panel_edp_get_non_edid_modes()
364 	if (!p->enabled)  in panel_edp_disable()
367 	if (p->desc->delay.disable)  in panel_edp_disable()
368 		msleep(p->desc->delay.disable);  in panel_edp_disable()
370 	p->enabled = false;  in panel_edp_disable()
379 	gpiod_set_value_cansleep(p->enable_gpio, 0);  in panel_edp_suspend()
380 	regulator_disable(p->supply);  in panel_edp_suspend()
381 	p->unprepared_time = ktime_get();  in panel_edp_suspend()
391 	/* Unpreparing when already unprepared is a no-op */  in panel_edp_unprepare()
392 	if (!p->prepared)  in panel_edp_unprepare()
395 	pm_runtime_mark_last_busy(panel->dev);  in panel_edp_unprepare()
396 	ret = pm_runtime_put_autosuspend(panel->dev);  in panel_edp_unprepare()
399 	p->prepared = false;  in panel_edp_unprepare()
406 	p->hpd_gpio = devm_gpiod_get_optional(dev, "hpd", GPIOD_IN);  in panel_edp_get_hpd_gpio()
407 	if (IS_ERR(p->hpd_gpio))  in panel_edp_get_hpd_gpio()
408 		return dev_err_probe(dev, PTR_ERR(p->hpd_gpio),  in panel_edp_get_hpd_gpio()
416 	return !p->no_hpd && (p->hpd_gpio || (p->aux && p->aux->wait_hpd_asserted));  in panel_edp_can_read_hpd()
421 	struct device *dev = p->base.dev;  in panel_edp_prepare_once()
427 	panel_edp_wait(p->unprepared_time, p->desc->delay.unprepare);  in panel_edp_prepare_once()
429 	err = regulator_enable(p->supply);  in panel_edp_prepare_once()
435 	gpiod_set_value_cansleep(p->enable_gpio, 1);  in panel_edp_prepare_once()
437 	delay = p->desc->delay.hpd_reliable;  in panel_edp_prepare_once()
438 	if (p->no_hpd)  in panel_edp_prepare_once()
439 		delay = max(delay, p->desc->delay.hpd_absent);  in panel_edp_prepare_once()
444 		if (p->desc->delay.hpd_absent)  in panel_edp_prepare_once()
445 			hpd_wait_us = p->desc->delay.hpd_absent * 1000UL;  in panel_edp_prepare_once()
449 		if (p->hpd_gpio) {  in panel_edp_prepare_once()
451 						 p->hpd_gpio, hpd_asserted,  in panel_edp_prepare_once()
456 			err = p->aux->wait_hpd_asserted(p->aux, hpd_wait_us);  in panel_edp_prepare_once()
460 			if (err != -ETIMEDOUT)  in panel_edp_prepare_once()
467 	p->prepared_time = ktime_get();  in panel_edp_prepare_once()
472 	gpiod_set_value_cansleep(p->enable_gpio, 0);  in panel_edp_prepare_once()
473 	regulator_disable(p->supply);  in panel_edp_prepare_once()
474 	p->unprepared_time = ktime_get();  in panel_edp_prepare_once()
493 		if (ret != -ETIMEDOUT)  in panel_edp_resume()
497 	if (ret == -ETIMEDOUT)  in panel_edp_resume()
510 	/* Preparing when already prepared is a no-op */  in panel_edp_prepare()
511 	if (p->prepared)  in panel_edp_prepare()
514 	ret = pm_runtime_get_sync(panel->dev);  in panel_edp_prepare()
516 		pm_runtime_put_autosuspend(panel->dev);  in panel_edp_prepare()
520 	p->prepared = true;  in panel_edp_prepare()
530 	if (p->enabled)  in panel_edp_enable()
533 	delay = p->desc->delay.enable;  in panel_edp_enable()
543 	 * called (and link training took zero time). Note that "no-hpd"  in panel_edp_enable()
552 	if (p->desc->delay.prepare_to_enable &&  in panel_edp_enable()
553 	    !panel_edp_can_read_hpd(p) && !p->no_hpd)  in panel_edp_enable()
554 		delay = max(delay, p->desc->delay.prepare_to_enable);  in panel_edp_enable()
559 	panel_edp_wait(p->prepared_time, p->desc->delay.prepare_to_enable);  in panel_edp_enable()
561 	p->enabled = true;  in panel_edp_enable()
573 	if (p->ddc) {  in panel_edp_get_modes()
574 		pm_runtime_get_sync(panel->dev);  in panel_edp_get_modes()
576 		if (!p->edid)  in panel_edp_get_modes()
577 			p->edid = drm_get_edid(connector, p->ddc);  in panel_edp_get_modes()
579 		if (p->edid)  in panel_edp_get_modes()
580 			num += drm_add_edid_modes(connector, p->edid);  in panel_edp_get_modes()
582 		pm_runtime_mark_last_busy(panel->dev);  in panel_edp_get_modes()
583 		pm_runtime_put_autosuspend(panel->dev);  in panel_edp_get_modes()
587 	 * Add hard-coded panel modes. Don't call this if there are no timings  in panel_edp_get_modes()
588 	 * and no modes (the generic edp-panel case) because it will clobber  in panel_edp_get_modes()
591 	if (p->desc->num_timings || p->desc->num_modes)  in panel_edp_get_modes()
594 		dev_warn(p->base.dev, "No display modes\n");  in panel_edp_get_modes()
600 	drm_connector_set_panel_orientation(connector, p->orientation);  in panel_edp_get_modes()
612 	if (p->desc->num_timings < num_timings)  in panel_edp_get_timings()
613 		num_timings = p->desc->num_timings;  in panel_edp_get_timings()
617 			timings[i] = p->desc->timings[i];  in panel_edp_get_timings()
619 	return p->desc->num_timings;  in panel_edp_get_timings()
626 	return p->orientation;  in panel_edp_get_orientation()
631 	struct drm_panel *panel = s->private;  in detected_panel_show()
634 	if (IS_ERR(p->detected_panel))  in detected_panel_show()
636 	else if (!p->detected_panel)  in detected_panel_show()
639 		seq_printf(s, "%s\n", p->detected_panel->name);  in detected_panel_show()
663 	(to_check->field.typ >= bounds->field.min && \
664 	 to_check->field.typ <= bounds->field.max)
669 	const struct panel_desc *desc = panel->desc;  in panel_edp_parse_panel_timing_node()
673 	if (WARN_ON(desc->num_modes)) {  in panel_edp_parse_panel_timing_node()
674 		dev_err(dev, "Reject override mode: panel has a fixed mode\n");  in panel_edp_parse_panel_timing_node()
677 	if (WARN_ON(!desc->num_timings)) {  in panel_edp_parse_panel_timing_node()
678 		dev_err(dev, "Reject override mode: no timings specified\n");  in panel_edp_parse_panel_timing_node()
682 	for (i = 0; i < panel->desc->num_timings; i++) {  in panel_edp_parse_panel_timing_node()
683 		const struct display_timing *dt = &panel->desc->timings[i];  in panel_edp_parse_panel_timing_node()
695 		if (ot->flags != dt->flags)  in panel_edp_parse_panel_timing_node()
699 		drm_display_mode_from_videomode(&vm, &panel->override_mode);  in panel_edp_parse_panel_timing_node()
700 		panel->override_mode.type |= DRM_MODE_TYPE_DRIVER |  in panel_edp_parse_panel_timing_node()
705 	if (WARN_ON(!panel->override_mode.type))  in panel_edp_parse_panel_timing_node()
706 		dev_err(dev, "Reject override mode: No display_timing found\n");  in panel_edp_parse_panel_timing_node()
723 		return -ENOMEM;  in generic_edp_panel_probe()
724 	panel->desc = desc;  in generic_edp_panel_probe()
731 	of_property_read_u32(dev->of_node, "hpd-reliable-delay-ms", &reliable_ms);  in generic_edp_panel_probe()
732 	desc->delay.hpd_reliable = reliable_ms;  in generic_edp_panel_probe()
733 	of_property_read_u32(dev->of_node, "hpd-absent-delay-ms", &absent_ms);  in generic_edp_panel_probe()
734 	desc->delay.hpd_absent = absent_ms;  in generic_edp_panel_probe()
743 	panel_id = drm_edid_get_panel_id(panel->ddc);  in generic_edp_panel_probe()
746 		ret = -EIO;  in generic_edp_panel_probe()
751 	panel->detected_panel = find_edp_panel(panel_id);  in generic_edp_panel_probe()
754 	 * We're using non-optimized timings and want it really obvious that  in generic_edp_panel_probe()
758 	if (WARN_ON(!panel->detected_panel)) {  in generic_edp_panel_probe()
766 		 * the HPD-related delays must have worked since we got this  in generic_edp_panel_probe()
778 		desc->delay.unprepare = 2000;  in generic_edp_panel_probe()
779 		desc->delay.enable = 200;  in generic_edp_panel_probe()
781 		panel->detected_panel = ERR_PTR(-EINVAL);  in generic_edp_panel_probe()
784 			 vend, panel->detected_panel->name, product_id);  in generic_edp_panel_probe()
787 		desc->delay = *panel->detected_panel->delay;  in generic_edp_panel_probe()
808 		return -ENOMEM;  in panel_edp_probe()
810 	panel->enabled = false;  in panel_edp_probe()
811 	panel->prepared_time = 0;  in panel_edp_probe()
812 	panel->desc = desc;  in panel_edp_probe()
813 	panel->aux = aux;  in panel_edp_probe()
815 	panel->no_hpd = of_property_read_bool(dev->of_node, "no-hpd");  in panel_edp_probe()
816 	if (!panel->no_hpd) {  in panel_edp_probe()
822 	panel->supply = devm_regulator_get(dev, "power");  in panel_edp_probe()
823 	if (IS_ERR(panel->supply))  in panel_edp_probe()
824 		return PTR_ERR(panel->supply);  in panel_edp_probe()
826 	panel->enable_gpio = devm_gpiod_get_optional(dev, "enable",  in panel_edp_probe()
828 	if (IS_ERR(panel->enable_gpio))  in panel_edp_probe()
829 		return dev_err_probe(dev, PTR_ERR(panel->enable_gpio),  in panel_edp_probe()
832 	err = of_drm_get_panel_orientation(dev->of_node, &panel->orientation);  in panel_edp_probe()
834 		dev_err(dev, "%pOF: failed to get orientation %d\n", dev->of_node, err);  in panel_edp_probe()
838 	ddc = of_parse_phandle(dev->of_node, "ddc-i2c-bus", 0);  in panel_edp_probe()
840 		panel->ddc = of_find_i2c_adapter_by_node(ddc);  in panel_edp_probe()
843 		if (!panel->ddc)  in panel_edp_probe()
844 			return -EPROBE_DEFER;  in panel_edp_probe()
846 		panel->ddc = &aux->ddc;  in panel_edp_probe()
849 	if (!of_get_display_timing(dev->of_node, "panel-timing", &dt))  in panel_edp_probe()
854 	drm_panel_init(&panel->base, dev, &panel_edp_funcs, DRM_MODE_CONNECTOR_eDP);  in panel_edp_probe()
856 	err = drm_panel_of_backlight(&panel->base);  in panel_edp_probe()
870 	if (of_device_is_compatible(dev->of_node, "edp-panel")) {  in panel_edp_probe()
878 		desc = panel->desc;  in panel_edp_probe()
879 	} else if (desc->bpc != 6 && desc->bpc != 8 && desc->bpc != 10) {  in panel_edp_probe()
880 		dev_warn(dev, "Expected bpc in {6,8,10} but got: %u\n", desc->bpc);  in panel_edp_probe()
883 	if (!panel->base.backlight && panel->aux) {  in panel_edp_probe()
885 		err = drm_panel_dp_aux_backlight(&panel->base, panel->aux);  in panel_edp_probe()
892 	drm_panel_add(&panel->base);  in panel_edp_probe()
900 	if (panel->ddc && (!panel->aux || panel->ddc != &panel->aux->ddc))  in panel_edp_probe()
901 		put_device(&panel->ddc->dev);  in panel_edp_probe()
910 	drm_panel_remove(&panel->base);  in panel_edp_remove()
911 	drm_panel_disable(&panel->base);  in panel_edp_remove()
912 	drm_panel_unprepare(&panel->base);  in panel_edp_remove()
916 	if (panel->ddc && (!panel->aux || panel->ddc != &panel->aux->ddc))  in panel_edp_remove()
917 		put_device(&panel->ddc->dev);  in panel_edp_remove()
919 	kfree(panel->edid);  in panel_edp_remove()
920 	panel->edid = NULL;  in panel_edp_remove()
929 	drm_panel_disable(&panel->base);  in panel_edp_shutdown()
930 	drm_panel_unprepare(&panel->base);  in panel_edp_shutdown()
1144 		/* TODO: should be hpd-absent and no-hpd should be set? */
1224 		 * - If HPD isn't hooked up you still have 200 ms delay.
1225 		 * - If HPD is hooked up we won't try to look at it for the
1258 		/* TODO: should be hpd-absent and no-hpd should be set? */
1296  * - total horizontal time: { 1506, 1592, 1716 }
1297  * - total vertical time: { 788, 800, 868 }
1713 		/* TODO: should be hpd-absent and no-hpd should be set? */
1723 		.compatible = "edp-panel",
1749 		.compatible = "boe,nv110wtm-n61",
1752 		.compatible = "boe,nv133fhm-n61",
1755 		.compatible = "boe,nv133fhm-n62",
1761 		.compatible = "innolux,n116bca-ea1",
1767 		.compatible = "innolux,n125hce-gn1",
1770 		.compatible = "innolux,p120zdg-bf1",
1773 		.compatible = "ivo,m133nwf4-r0",
1776 		.compatible = "kingdisplay,kd116n21-30nv-a010",
1779 		.compatible = "lg,lp079qx1-sp0v",
1782 		.compatible = "lg,lp097qx1-spa1",
1794 		.compatible = "samsung,lsn122dl01-c01",
1797 		.compatible = "samsung,ltn140at29-301",
1800 		.compatible = "sharp,ld-d5116z01b",
1877 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0786, &delay_200_500_p2e80, "NV116WHM-T01"),
1878 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x07d1, &boe_nv133fhm_n61.delay, "NV133FHM-N61"),
1879 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x082d, &boe_nv133fhm_n61.delay, "NV133FHM-N62"),
1880 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x094b, &delay_200_500_e50, "NT116WHM-N21"),
1881 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x098d, &boe_nv110wtm_n61.delay, "NV110WTM-N61"),
1882 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x09dd, &delay_200_500_e50, "NT116WHM-N21"),
1883 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0a5d, &delay_200_500_e50, "NV116WHM-N45"),
1884 	EDP_PANEL_ENTRY('B', 'O', 'E', 0x0ac5, &delay_200_500_e50, "NV116WHM-N4C"),
1886 	EDP_PANEL_ENTRY('C', 'M', 'N', 0x114c, &innolux_n116bca_ea1.delay, "N116BCA-EA1"),
1887 	EDP_PANEL_ENTRY('C', 'M', 'N', 0x1152, &delay_200_500_e80_d50, "N116BCN-EA1"),
1888 	EDP_PANEL_ENTRY('C', 'M', 'N', 0x1154, &delay_200_500_e80_d50, "N116BCA-EA2"),
1889 	EDP_PANEL_ENTRY('C', 'M', 'N', 0x1247, &delay_200_500_e80_d50, "N120ACA-EA1"),
1892 	EDP_PANEL_ENTRY('I', 'V', 'O', 0x854b, &delay_200_500_p2e100, "M133NW4J-R3"),
1894 	EDP_PANEL_ENTRY('K', 'D', 'B', 0x0624, &kingdisplay_kd116n21_30nv_a010.delay, "116N21-30NV-A010"),
1895 	EDP_PANEL_ENTRY('K', 'D', 'B', 0x1120, &delay_200_500_e80_d50, "116N29-30NK-C007"),
1901 	EDP_PANEL_ENTRY('S', 'T', 'A', 0x0100, &delay_100_500_e200, "2081116HHD028001-51D"),
1913 	for (panel = edp_panels; panel->panel_id; panel++)  in find_edp_panel()
1914 		if (panel->panel_id == panel_id)  in find_edp_panel()
1924 	/* Skip one since "edp-panel" is only supported on DP AUX bus */  in panel_edp_platform_probe()
1925 	id = of_match_node(platform_of_match + 1, pdev->dev.of_node);  in panel_edp_platform_probe()
1927 		return -ENODEV;  in panel_edp_platform_probe()
1929 	return panel_edp_probe(&pdev->dev, id->data, NULL);  in panel_edp_platform_probe()
1934 	return panel_edp_remove(&pdev->dev);  in panel_edp_platform_remove()
1939 	panel_edp_shutdown(&pdev->dev);  in panel_edp_platform_shutdown()
1950 		.name = "panel-edp",
1963 	id = of_match_node(platform_of_match, aux_ep->dev.of_node);  in panel_edp_dp_aux_ep_probe()
1965 		return -ENODEV;  in panel_edp_dp_aux_ep_probe()
1967 	return panel_edp_probe(&aux_ep->dev, id->data, aux_ep->aux);  in panel_edp_dp_aux_ep_probe()
1972 	panel_edp_remove(&aux_ep->dev);  in panel_edp_dp_aux_ep_remove()
1977 	panel_edp_shutdown(&aux_ep->dev);  in panel_edp_dp_aux_ep_shutdown()
1982 		.name = "panel-simple-dp-aux",