This source file includes following definitions.
- tegra_output_connector_get_modes
- tegra_output_connector_detect
- tegra_output_connector_destroy
- tegra_output_encoder_destroy
- hpd_irq
- tegra_output_probe
- tegra_output_remove
- tegra_output_init
- tegra_output_exit
- tegra_output_find_possible_crtcs
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7 #include <drm/drm_atomic_helper.h>
8 #include <drm/drm_panel.h>
9
10 #include "drm.h"
11 #include "dc.h"
12
13 #include <media/cec-notifier.h>
14
15 int tegra_output_connector_get_modes(struct drm_connector *connector)
16 {
17 struct tegra_output *output = connector_to_output(connector);
18 struct edid *edid = NULL;
19 int err = 0;
20
21
22
23
24
25 if (output->panel) {
26 err = output->panel->funcs->get_modes(output->panel);
27 if (err > 0)
28 return err;
29 }
30
31 if (output->edid)
32 edid = kmemdup(output->edid, sizeof(*edid), GFP_KERNEL);
33 else if (output->ddc)
34 edid = drm_get_edid(connector, output->ddc);
35
36 cec_notifier_set_phys_addr_from_edid(output->cec, edid);
37 drm_connector_update_edid_property(connector, edid);
38
39 if (edid) {
40 err = drm_add_edid_modes(connector, edid);
41 kfree(edid);
42 }
43
44 return err;
45 }
46
47 enum drm_connector_status
48 tegra_output_connector_detect(struct drm_connector *connector, bool force)
49 {
50 struct tegra_output *output = connector_to_output(connector);
51 enum drm_connector_status status = connector_status_unknown;
52
53 if (output->hpd_gpio) {
54 if (gpiod_get_value(output->hpd_gpio) == 0)
55 status = connector_status_disconnected;
56 else
57 status = connector_status_connected;
58 } else {
59 if (!output->panel)
60 status = connector_status_disconnected;
61 else
62 status = connector_status_connected;
63 }
64
65 if (status != connector_status_connected)
66 cec_notifier_phys_addr_invalidate(output->cec);
67
68 return status;
69 }
70
71 void tegra_output_connector_destroy(struct drm_connector *connector)
72 {
73 drm_connector_unregister(connector);
74 drm_connector_cleanup(connector);
75 }
76
77 void tegra_output_encoder_destroy(struct drm_encoder *encoder)
78 {
79 drm_encoder_cleanup(encoder);
80 }
81
82 static irqreturn_t hpd_irq(int irq, void *data)
83 {
84 struct tegra_output *output = data;
85
86 if (output->connector.dev)
87 drm_helper_hpd_irq_event(output->connector.dev);
88
89 return IRQ_HANDLED;
90 }
91
92 int tegra_output_probe(struct tegra_output *output)
93 {
94 struct device_node *ddc, *panel;
95 unsigned long flags;
96 int err, size;
97
98 if (!output->of_node)
99 output->of_node = output->dev->of_node;
100
101 panel = of_parse_phandle(output->of_node, "nvidia,panel", 0);
102 if (panel) {
103 output->panel = of_drm_find_panel(panel);
104 if (IS_ERR(output->panel))
105 return PTR_ERR(output->panel);
106
107 of_node_put(panel);
108 }
109
110 output->edid = of_get_property(output->of_node, "nvidia,edid", &size);
111
112 ddc = of_parse_phandle(output->of_node, "nvidia,ddc-i2c-bus", 0);
113 if (ddc) {
114 output->ddc = of_find_i2c_adapter_by_node(ddc);
115 if (!output->ddc) {
116 err = -EPROBE_DEFER;
117 of_node_put(ddc);
118 return err;
119 }
120
121 of_node_put(ddc);
122 }
123
124 output->hpd_gpio = devm_gpiod_get_from_of_node(output->dev,
125 output->of_node,
126 "nvidia,hpd-gpio", 0,
127 GPIOD_IN,
128 "HDMI hotplug detect");
129 if (IS_ERR(output->hpd_gpio)) {
130 if (PTR_ERR(output->hpd_gpio) != -ENOENT)
131 return PTR_ERR(output->hpd_gpio);
132
133 output->hpd_gpio = NULL;
134 }
135
136 if (output->hpd_gpio) {
137 err = gpiod_to_irq(output->hpd_gpio);
138 if (err < 0) {
139 dev_err(output->dev, "gpiod_to_irq(): %d\n", err);
140 return err;
141 }
142
143 output->hpd_irq = err;
144
145 flags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING |
146 IRQF_ONESHOT;
147
148 err = request_threaded_irq(output->hpd_irq, NULL, hpd_irq,
149 flags, "hpd", output);
150 if (err < 0) {
151 dev_err(output->dev, "failed to request IRQ#%u: %d\n",
152 output->hpd_irq, err);
153 return err;
154 }
155
156 output->connector.polled = DRM_CONNECTOR_POLL_HPD;
157
158
159
160
161
162
163 disable_irq(output->hpd_irq);
164 }
165
166 output->cec = cec_notifier_get(output->dev);
167 if (!output->cec)
168 return -ENOMEM;
169
170 return 0;
171 }
172
173 void tegra_output_remove(struct tegra_output *output)
174 {
175 if (output->cec)
176 cec_notifier_put(output->cec);
177
178 if (output->hpd_gpio)
179 free_irq(output->hpd_irq, output);
180
181 if (output->ddc)
182 put_device(&output->ddc->dev);
183 }
184
185 int tegra_output_init(struct drm_device *drm, struct tegra_output *output)
186 {
187 int err;
188
189 if (output->panel) {
190 err = drm_panel_attach(output->panel, &output->connector);
191 if (err < 0)
192 return err;
193 }
194
195
196
197
198
199 if (output->hpd_gpio)
200 enable_irq(output->hpd_irq);
201
202 return 0;
203 }
204
205 void tegra_output_exit(struct tegra_output *output)
206 {
207
208
209
210
211 if (output->hpd_gpio)
212 disable_irq(output->hpd_irq);
213
214 if (output->panel)
215 drm_panel_detach(output->panel);
216 }
217
218 void tegra_output_find_possible_crtcs(struct tegra_output *output,
219 struct drm_device *drm)
220 {
221 struct device *dev = output->dev;
222 struct drm_crtc *crtc;
223 unsigned int mask = 0;
224
225 drm_for_each_crtc(crtc, drm) {
226 struct tegra_dc *dc = to_tegra_dc(crtc);
227
228 if (tegra_dc_has_output(dc, dev))
229 mask |= drm_crtc_mask(crtc);
230 }
231
232 if (mask == 0) {
233 dev_warn(dev, "missing output definition for heads in DT\n");
234 mask = 0x3;
235 }
236
237 output->encoder.possible_crtcs = mask;
238 }