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v4.6
 
  1/*
  2 * Copyright (C) 2012 Avionic Design GmbH
  3 * Copyright (C) 2012 NVIDIA CORPORATION.  All rights reserved.
  4 *
  5 * This program is free software; you can redistribute it and/or modify
  6 * it under the terms of the GNU General Public License version 2 as
  7 * published by the Free Software Foundation.
  8 */
  9
 10#include <drm/drm_atomic_helper.h>
 11#include <drm/drm_panel.h>
 
 
 12#include "drm.h"
 
 
 
 13
 14int tegra_output_connector_get_modes(struct drm_connector *connector)
 15{
 16	struct tegra_output *output = connector_to_output(connector);
 17	struct edid *edid = NULL;
 18	int err = 0;
 19
 20	/*
 21	 * If the panel provides one or more modes, use them exclusively and
 22	 * ignore any other means of obtaining a mode.
 23	 */
 24	if (output->panel) {
 25		err = output->panel->funcs->get_modes(output->panel);
 26		if (err > 0)
 27			return err;
 28	}
 29
 30	if (output->edid)
 31		edid = kmemdup(output->edid, sizeof(*edid), GFP_KERNEL);
 32	else if (output->ddc)
 33		edid = drm_get_edid(connector, output->ddc);
 34
 35	drm_mode_connector_update_edid_property(connector, edid);
 
 36
 37	if (edid) {
 38		err = drm_add_edid_modes(connector, edid);
 39		kfree(edid);
 40	}
 41
 42	return err;
 43}
 44
 45struct drm_encoder *
 46tegra_output_connector_best_encoder(struct drm_connector *connector)
 47{
 48	struct tegra_output *output = connector_to_output(connector);
 49
 50	return &output->encoder;
 51}
 52
 53enum drm_connector_status
 54tegra_output_connector_detect(struct drm_connector *connector, bool force)
 55{
 56	struct tegra_output *output = connector_to_output(connector);
 57	enum drm_connector_status status = connector_status_unknown;
 58
 59	if (gpio_is_valid(output->hpd_gpio)) {
 60		if (output->hpd_gpio_flags & OF_GPIO_ACTIVE_LOW) {
 61			if (gpio_get_value(output->hpd_gpio) != 0)
 62				status = connector_status_disconnected;
 63			else
 64				status = connector_status_connected;
 65		} else {
 66			if (gpio_get_value(output->hpd_gpio) == 0)
 67				status = connector_status_disconnected;
 68			else
 69				status = connector_status_connected;
 70		}
 71	} else {
 72		if (!output->panel)
 73			status = connector_status_disconnected;
 74		else
 75			status = connector_status_connected;
 76	}
 77
 
 
 
 78	return status;
 79}
 80
 81void tegra_output_connector_destroy(struct drm_connector *connector)
 82{
 
 
 
 
 
 83	drm_connector_unregister(connector);
 84	drm_connector_cleanup(connector);
 85}
 86
 87void tegra_output_encoder_destroy(struct drm_encoder *encoder)
 88{
 89	drm_encoder_cleanup(encoder);
 90}
 91
 92static irqreturn_t hpd_irq(int irq, void *data)
 93{
 94	struct tegra_output *output = data;
 95
 96	if (output->connector.dev)
 97		drm_helper_hpd_irq_event(output->connector.dev);
 98
 99	return IRQ_HANDLED;
100}
101
102int tegra_output_probe(struct tegra_output *output)
103{
104	struct device_node *ddc, *panel;
 
105	int err, size;
106
107	if (!output->of_node)
108		output->of_node = output->dev->of_node;
109
110	panel = of_parse_phandle(output->of_node, "nvidia,panel", 0);
111	if (panel) {
112		output->panel = of_drm_find_panel(panel);
113		if (!output->panel)
114			return -EPROBE_DEFER;
115
116		of_node_put(panel);
117	}
118
119	output->edid = of_get_property(output->of_node, "nvidia,edid", &size);
120
121	ddc = of_parse_phandle(output->of_node, "nvidia,ddc-i2c-bus", 0);
122	if (ddc) {
123		output->ddc = of_find_i2c_adapter_by_node(ddc);
124		if (!output->ddc) {
125			err = -EPROBE_DEFER;
126			of_node_put(ddc);
127			return err;
128		}
129
130		of_node_put(ddc);
131	}
132
133	output->hpd_gpio = of_get_named_gpio_flags(output->of_node,
134						   "nvidia,hpd-gpio", 0,
135						   &output->hpd_gpio_flags);
136	if (gpio_is_valid(output->hpd_gpio)) {
137		unsigned long flags;
 
 
 
138
139		err = gpio_request_one(output->hpd_gpio, GPIOF_DIR_IN,
140				       "HDMI hotplug detect");
141		if (err < 0) {
142			dev_err(output->dev, "gpio_request_one(): %d\n", err);
143			return err;
144		}
145
146		err = gpio_to_irq(output->hpd_gpio);
 
147		if (err < 0) {
148			dev_err(output->dev, "gpio_to_irq(): %d\n", err);
149			gpio_free(output->hpd_gpio);
150			return err;
151		}
152
153		output->hpd_irq = err;
154
155		flags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING |
156			IRQF_ONESHOT;
157
158		err = request_threaded_irq(output->hpd_irq, NULL, hpd_irq,
159					   flags, "hpd", output);
160		if (err < 0) {
161			dev_err(output->dev, "failed to request IRQ#%u: %d\n",
162				output->hpd_irq, err);
163			gpio_free(output->hpd_gpio);
164			return err;
165		}
166
167		output->connector.polled = DRM_CONNECTOR_POLL_HPD;
168
169		/*
170		 * Disable the interrupt until the connector has been
171		 * initialized to avoid a race in the hotplug interrupt
172		 * handler.
173		 */
174		disable_irq(output->hpd_irq);
175	}
176
177	return 0;
178}
179
180void tegra_output_remove(struct tegra_output *output)
181{
182	if (gpio_is_valid(output->hpd_gpio)) {
183		free_irq(output->hpd_irq, output);
184		gpio_free(output->hpd_gpio);
185	}
186
187	if (output->ddc)
188		put_device(&output->ddc->dev);
189}
190
191int tegra_output_init(struct drm_device *drm, struct tegra_output *output)
192{
 
193	int err;
194
195	if (output->panel) {
196		err = drm_panel_attach(output->panel, &output->connector);
197		if (err < 0)
198			return err;
199	}
200
201	/*
202	 * The connector is now registered and ready to receive hotplug events
203	 * so the hotplug interrupt can be enabled.
204	 */
205	if (gpio_is_valid(output->hpd_gpio))
206		enable_irq(output->hpd_irq);
207
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
208	return 0;
209}
210
211void tegra_output_exit(struct tegra_output *output)
212{
213	/*
214	 * The connector is going away, so the interrupt must be disabled to
215	 * prevent the hotplug interrupt handler from potentially crashing.
216	 */
217	if (gpio_is_valid(output->hpd_gpio))
218		disable_irq(output->hpd_irq);
219
220	if (output->panel)
221		drm_panel_detach(output->panel);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
222}
v5.9
  1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * Copyright (C) 2012 Avionic Design GmbH
  4 * Copyright (C) 2012 NVIDIA CORPORATION.  All rights reserved.
 
 
 
 
  5 */
  6
  7#include <drm/drm_atomic_helper.h>
  8#include <drm/drm_panel.h>
  9#include <drm/drm_simple_kms_helper.h>
 10
 11#include "drm.h"
 12#include "dc.h"
 13
 14#include <media/cec-notifier.h>
 15
 16int tegra_output_connector_get_modes(struct drm_connector *connector)
 17{
 18	struct tegra_output *output = connector_to_output(connector);
 19	struct edid *edid = NULL;
 20	int err = 0;
 21
 22	/*
 23	 * If the panel provides one or more modes, use them exclusively and
 24	 * ignore any other means of obtaining a mode.
 25	 */
 26	if (output->panel) {
 27		err = drm_panel_get_modes(output->panel, connector);
 28		if (err > 0)
 29			return err;
 30	}
 31
 32	if (output->edid)
 33		edid = kmemdup(output->edid, sizeof(*edid), GFP_KERNEL);
 34	else if (output->ddc)
 35		edid = drm_get_edid(connector, output->ddc);
 36
 37	cec_notifier_set_phys_addr_from_edid(output->cec, edid);
 38	drm_connector_update_edid_property(connector, edid);
 39
 40	if (edid) {
 41		err = drm_add_edid_modes(connector, edid);
 42		kfree(edid);
 43	}
 44
 45	return err;
 46}
 47
 
 
 
 
 
 
 
 
 48enum drm_connector_status
 49tegra_output_connector_detect(struct drm_connector *connector, bool force)
 50{
 51	struct tegra_output *output = connector_to_output(connector);
 52	enum drm_connector_status status = connector_status_unknown;
 53
 54	if (output->hpd_gpio) {
 55		if (gpiod_get_value(output->hpd_gpio) == 0)
 56			status = connector_status_disconnected;
 57		else
 58			status = connector_status_connected;
 
 
 
 
 
 
 
 59	} else {
 60		if (!output->panel)
 61			status = connector_status_disconnected;
 62		else
 63			status = connector_status_connected;
 64	}
 65
 66	if (status != connector_status_connected)
 67		cec_notifier_phys_addr_invalidate(output->cec);
 68
 69	return status;
 70}
 71
 72void tegra_output_connector_destroy(struct drm_connector *connector)
 73{
 74	struct tegra_output *output = connector_to_output(connector);
 75
 76	if (output->cec)
 77		cec_notifier_conn_unregister(output->cec);
 78
 79	drm_connector_unregister(connector);
 80	drm_connector_cleanup(connector);
 81}
 82
 
 
 
 
 
 83static irqreturn_t hpd_irq(int irq, void *data)
 84{
 85	struct tegra_output *output = data;
 86
 87	if (output->connector.dev)
 88		drm_helper_hpd_irq_event(output->connector.dev);
 89
 90	return IRQ_HANDLED;
 91}
 92
 93int tegra_output_probe(struct tegra_output *output)
 94{
 95	struct device_node *ddc, *panel;
 96	unsigned long flags;
 97	int err, size;
 98
 99	if (!output->of_node)
100		output->of_node = output->dev->of_node;
101
102	panel = of_parse_phandle(output->of_node, "nvidia,panel", 0);
103	if (panel) {
104		output->panel = of_drm_find_panel(panel);
105		if (IS_ERR(output->panel))
106			return PTR_ERR(output->panel);
107
108		of_node_put(panel);
109	}
110
111	output->edid = of_get_property(output->of_node, "nvidia,edid", &size);
112
113	ddc = of_parse_phandle(output->of_node, "nvidia,ddc-i2c-bus", 0);
114	if (ddc) {
115		output->ddc = of_find_i2c_adapter_by_node(ddc);
116		if (!output->ddc) {
117			err = -EPROBE_DEFER;
118			of_node_put(ddc);
119			return err;
120		}
121
122		of_node_put(ddc);
123	}
124
125	output->hpd_gpio = devm_gpiod_get_from_of_node(output->dev,
126						       output->of_node,
127						       "nvidia,hpd-gpio", 0,
128						       GPIOD_IN,
129						       "HDMI hotplug detect");
130	if (IS_ERR(output->hpd_gpio)) {
131		if (PTR_ERR(output->hpd_gpio) != -ENOENT)
132			return PTR_ERR(output->hpd_gpio);
133
134		output->hpd_gpio = NULL;
135	}
 
 
 
 
136
137	if (output->hpd_gpio) {
138		err = gpiod_to_irq(output->hpd_gpio);
139		if (err < 0) {
140			dev_err(output->dev, "gpiod_to_irq(): %d\n", err);
 
141			return err;
142		}
143
144		output->hpd_irq = err;
145
146		flags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING |
147			IRQF_ONESHOT;
148
149		err = request_threaded_irq(output->hpd_irq, NULL, hpd_irq,
150					   flags, "hpd", output);
151		if (err < 0) {
152			dev_err(output->dev, "failed to request IRQ#%u: %d\n",
153				output->hpd_irq, err);
 
154			return err;
155		}
156
157		output->connector.polled = DRM_CONNECTOR_POLL_HPD;
158
159		/*
160		 * Disable the interrupt until the connector has been
161		 * initialized to avoid a race in the hotplug interrupt
162		 * handler.
163		 */
164		disable_irq(output->hpd_irq);
165	}
166
167	return 0;
168}
169
170void tegra_output_remove(struct tegra_output *output)
171{
172	if (output->hpd_gpio)
173		free_irq(output->hpd_irq, output);
 
 
174
175	if (output->ddc)
176		put_device(&output->ddc->dev);
177}
178
179int tegra_output_init(struct drm_device *drm, struct tegra_output *output)
180{
181	int connector_type;
182	int err;
183
184	if (output->panel) {
185		err = drm_panel_attach(output->panel, &output->connector);
186		if (err < 0)
187			return err;
188	}
189
190	/*
191	 * The connector is now registered and ready to receive hotplug events
192	 * so the hotplug interrupt can be enabled.
193	 */
194	if (output->hpd_gpio)
195		enable_irq(output->hpd_irq);
196
197	connector_type = output->connector.connector_type;
198	/*
199	 * Create a CEC notifier for HDMI connector.
200	 */
201	if (connector_type == DRM_MODE_CONNECTOR_HDMIA ||
202	    connector_type == DRM_MODE_CONNECTOR_HDMIB) {
203		struct cec_connector_info conn_info;
204
205		cec_fill_conn_info_from_drm(&conn_info, &output->connector);
206		output->cec = cec_notifier_conn_register(output->dev, NULL,
207							 &conn_info);
208		if (!output->cec)
209			return -ENOMEM;
210	}
211
212	return 0;
213}
214
215void tegra_output_exit(struct tegra_output *output)
216{
217	/*
218	 * The connector is going away, so the interrupt must be disabled to
219	 * prevent the hotplug interrupt handler from potentially crashing.
220	 */
221	if (output->hpd_gpio)
222		disable_irq(output->hpd_irq);
223
224	if (output->panel)
225		drm_panel_detach(output->panel);
226}
227
228void tegra_output_find_possible_crtcs(struct tegra_output *output,
229				      struct drm_device *drm)
230{
231	struct device *dev = output->dev;
232	struct drm_crtc *crtc;
233	unsigned int mask = 0;
234
235	drm_for_each_crtc(crtc, drm) {
236		struct tegra_dc *dc = to_tegra_dc(crtc);
237
238		if (tegra_dc_has_output(dc, dev))
239			mask |= drm_crtc_mask(crtc);
240	}
241
242	if (mask == 0) {
243		dev_warn(dev, "missing output definition for heads in DT\n");
244		mask = 0x3;
245	}
246
247	output->encoder.possible_crtcs = mask;
248}
249
250int tegra_output_suspend(struct tegra_output *output)
251{
252	if (output->hpd_irq)
253		disable_irq(output->hpd_irq);
254
255	return 0;
256}
257
258int tegra_output_resume(struct tegra_output *output)
259{
260	if (output->hpd_irq)
261		enable_irq(output->hpd_irq);
262
263	return 0;
264}