1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2012 Avionic Design GmbH
4 * Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved.
7 #include <drm/drm_atomic_helper.h>
8 #include <drm/drm_panel.h>
9 #include <drm/drm_simple_kms_helper.h>
14 #include <media/cec-notifier.h>
16 int tegra_output_connector_get_modes(struct drm_connector *connector)
18 struct tegra_output *output = connector_to_output(connector);
19 struct edid *edid = NULL;
23 * If the panel provides one or more modes, use them exclusively and
24 * ignore any other means of obtaining a mode.
27 err = drm_panel_get_modes(output->panel, connector);
33 edid = kmemdup(output->edid, sizeof(*edid), GFP_KERNEL);
35 edid = drm_get_edid(connector, output->ddc);
37 cec_notifier_set_phys_addr_from_edid(output->cec, edid);
38 drm_connector_update_edid_property(connector, edid);
41 err = drm_add_edid_modes(connector, edid);
48 enum drm_connector_status
49 tegra_output_connector_detect(struct drm_connector *connector, bool force)
51 struct tegra_output *output = connector_to_output(connector);
52 enum drm_connector_status status = connector_status_unknown;
54 if (output->hpd_gpio) {
55 if (gpiod_get_value(output->hpd_gpio) == 0)
56 status = connector_status_disconnected;
58 status = connector_status_connected;
61 status = connector_status_disconnected;
63 status = connector_status_connected;
66 if (status != connector_status_connected)
67 cec_notifier_phys_addr_invalidate(output->cec);
72 void tegra_output_connector_destroy(struct drm_connector *connector)
74 struct tegra_output *output = connector_to_output(connector);
77 cec_notifier_conn_unregister(output->cec);
79 drm_connector_unregister(connector);
80 drm_connector_cleanup(connector);
83 static irqreturn_t hpd_irq(int irq, void *data)
85 struct tegra_output *output = data;
87 if (output->connector.dev)
88 drm_helper_hpd_irq_event(output->connector.dev);
93 int tegra_output_probe(struct tegra_output *output)
95 struct device_node *ddc, *panel;
100 output->of_node = output->dev->of_node;
102 panel = of_parse_phandle(output->of_node, "nvidia,panel", 0);
104 output->panel = of_drm_find_panel(panel);
105 if (IS_ERR(output->panel))
106 return PTR_ERR(output->panel);
111 output->edid = of_get_property(output->of_node, "nvidia,edid", &size);
113 ddc = of_parse_phandle(output->of_node, "nvidia,ddc-i2c-bus", 0);
115 output->ddc = of_find_i2c_adapter_by_node(ddc);
125 output->hpd_gpio = devm_gpiod_get_from_of_node(output->dev,
127 "nvidia,hpd-gpio", 0,
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);
134 output->hpd_gpio = NULL;
137 if (output->hpd_gpio) {
138 err = gpiod_to_irq(output->hpd_gpio);
140 dev_err(output->dev, "gpiod_to_irq(): %d\n", err);
144 output->hpd_irq = err;
146 flags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING |
149 err = request_threaded_irq(output->hpd_irq, NULL, hpd_irq,
150 flags, "hpd", output);
152 dev_err(output->dev, "failed to request IRQ#%u: %d\n",
153 output->hpd_irq, err);
157 output->connector.polled = DRM_CONNECTOR_POLL_HPD;
160 * Disable the interrupt until the connector has been
161 * initialized to avoid a race in the hotplug interrupt
164 disable_irq(output->hpd_irq);
170 void tegra_output_remove(struct tegra_output *output)
172 if (output->hpd_gpio)
173 free_irq(output->hpd_irq, output);
176 put_device(&output->ddc->dev);
179 int tegra_output_init(struct drm_device *drm, struct tegra_output *output)
185 err = drm_panel_attach(output->panel, &output->connector);
191 * The connector is now registered and ready to receive hotplug events
192 * so the hotplug interrupt can be enabled.
194 if (output->hpd_gpio)
195 enable_irq(output->hpd_irq);
197 connector_type = output->connector.connector_type;
199 * Create a CEC notifier for HDMI connector.
201 if (connector_type == DRM_MODE_CONNECTOR_HDMIA ||
202 connector_type == DRM_MODE_CONNECTOR_HDMIB) {
203 struct cec_connector_info conn_info;
205 cec_fill_conn_info_from_drm(&conn_info, &output->connector);
206 output->cec = cec_notifier_conn_register(output->dev, NULL,
215 void tegra_output_exit(struct tegra_output *output)
218 * The connector is going away, so the interrupt must be disabled to
219 * prevent the hotplug interrupt handler from potentially crashing.
221 if (output->hpd_gpio)
222 disable_irq(output->hpd_irq);
225 drm_panel_detach(output->panel);
228 void tegra_output_find_possible_crtcs(struct tegra_output *output,
229 struct drm_device *drm)
231 struct device *dev = output->dev;
232 struct drm_crtc *crtc;
233 unsigned int mask = 0;
235 drm_for_each_crtc(crtc, drm) {
236 struct tegra_dc *dc = to_tegra_dc(crtc);
238 if (tegra_dc_has_output(dc, dev))
239 mask |= drm_crtc_mask(crtc);
243 dev_warn(dev, "missing output definition for heads in DT\n");
247 output->encoder.possible_crtcs = mask;
250 int tegra_output_suspend(struct tegra_output *output)
253 disable_irq(output->hpd_irq);
258 int tegra_output_resume(struct tegra_output *output)
261 enable_irq(output->hpd_irq);