Commit | Line | Data |
---|---|---|
d8f4a9ed TR |
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 | ||
d8f4a9ed | 10 | #include <linux/of_gpio.h> |
d8f4a9ed | 11 | |
9be7d864 | 12 | #include <drm/drm_panel.h> |
d8f4a9ed TR |
13 | #include "drm.h" |
14 | ||
132085d8 | 15 | int tegra_output_connector_get_modes(struct drm_connector *connector) |
d8f4a9ed TR |
16 | { |
17 | struct tegra_output *output = connector_to_output(connector); | |
18 | struct edid *edid = NULL; | |
19 | int err = 0; | |
20 | ||
acde5413 TR |
21 | /* |
22 | * If the panel provides one or more modes, use them exclusively and | |
23 | * ignore any other means of obtaining a mode. | |
24 | */ | |
9be7d864 TR |
25 | if (output->panel) { |
26 | err = output->panel->funcs->get_modes(output->panel); | |
27 | if (err > 0) | |
28 | return err; | |
29 | } | |
30 | ||
d8f4a9ed TR |
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 | drm_mode_connector_update_edid_property(connector, edid); | |
37 | ||
38 | if (edid) { | |
39 | err = drm_add_edid_modes(connector, edid); | |
40 | kfree(edid); | |
41 | } | |
42 | ||
43 | return err; | |
44 | } | |
45 | ||
132085d8 TR |
46 | struct drm_encoder * |
47 | tegra_output_connector_best_encoder(struct drm_connector *connector) | |
d8f4a9ed TR |
48 | { |
49 | struct tegra_output *output = connector_to_output(connector); | |
50 | ||
51 | return &output->encoder; | |
52 | } | |
53 | ||
132085d8 TR |
54 | enum drm_connector_status |
55 | tegra_output_connector_detect(struct drm_connector *connector, bool force) | |
d8f4a9ed TR |
56 | { |
57 | struct tegra_output *output = connector_to_output(connector); | |
58 | enum drm_connector_status status = connector_status_unknown; | |
59 | ||
60 | if (gpio_is_valid(output->hpd_gpio)) { | |
61 | if (gpio_get_value(output->hpd_gpio) == 0) | |
62 | status = connector_status_disconnected; | |
63 | else | |
64 | status = connector_status_connected; | |
65 | } else { | |
9be7d864 TR |
66 | if (!output->panel) |
67 | status = connector_status_disconnected; | |
68 | else | |
69 | status = connector_status_connected; | |
d8f4a9ed TR |
70 | } |
71 | ||
72 | return status; | |
73 | } | |
74 | ||
132085d8 | 75 | void tegra_output_connector_destroy(struct drm_connector *connector) |
d8f4a9ed | 76 | { |
34ea3d38 | 77 | drm_connector_unregister(connector); |
d8f4a9ed TR |
78 | drm_connector_cleanup(connector); |
79 | } | |
80 | ||
132085d8 | 81 | void tegra_output_encoder_destroy(struct drm_encoder *encoder) |
d8f4a9ed TR |
82 | { |
83 | drm_encoder_cleanup(encoder); | |
84 | } | |
85 | ||
d8f4a9ed TR |
86 | static irqreturn_t hpd_irq(int irq, void *data) |
87 | { | |
88 | struct tegra_output *output = data; | |
89 | ||
8fc8f7da TR |
90 | if (output->connector.dev) |
91 | drm_helper_hpd_irq_event(output->connector.dev); | |
d8f4a9ed TR |
92 | |
93 | return IRQ_HANDLED; | |
94 | } | |
95 | ||
59d29c0e | 96 | int tegra_output_probe(struct tegra_output *output) |
d8f4a9ed | 97 | { |
9be7d864 | 98 | struct device_node *ddc, *panel; |
d8f4a9ed | 99 | enum of_gpio_flags flags; |
7236aa03 | 100 | int err, size; |
d8f4a9ed TR |
101 | |
102 | if (!output->of_node) | |
103 | output->of_node = output->dev->of_node; | |
104 | ||
9be7d864 TR |
105 | panel = of_parse_phandle(output->of_node, "nvidia,panel", 0); |
106 | if (panel) { | |
107 | output->panel = of_drm_find_panel(panel); | |
108 | if (!output->panel) | |
109 | return -EPROBE_DEFER; | |
110 | ||
111 | of_node_put(panel); | |
112 | } | |
113 | ||
d8f4a9ed TR |
114 | output->edid = of_get_property(output->of_node, "nvidia,edid", &size); |
115 | ||
116 | ddc = of_parse_phandle(output->of_node, "nvidia,ddc-i2c-bus", 0); | |
117 | if (ddc) { | |
118 | output->ddc = of_find_i2c_adapter_by_node(ddc); | |
119 | if (!output->ddc) { | |
120 | err = -EPROBE_DEFER; | |
121 | of_node_put(ddc); | |
122 | return err; | |
123 | } | |
124 | ||
125 | of_node_put(ddc); | |
126 | } | |
127 | ||
d8f4a9ed TR |
128 | output->hpd_gpio = of_get_named_gpio_flags(output->of_node, |
129 | "nvidia,hpd-gpio", 0, | |
130 | &flags); | |
d8f4a9ed TR |
131 | if (gpio_is_valid(output->hpd_gpio)) { |
132 | unsigned long flags; | |
133 | ||
134 | err = gpio_request_one(output->hpd_gpio, GPIOF_DIR_IN, | |
135 | "HDMI hotplug detect"); | |
136 | if (err < 0) { | |
137 | dev_err(output->dev, "gpio_request_one(): %d\n", err); | |
138 | return err; | |
139 | } | |
140 | ||
141 | err = gpio_to_irq(output->hpd_gpio); | |
142 | if (err < 0) { | |
143 | dev_err(output->dev, "gpio_to_irq(): %d\n", err); | |
59d29c0e TR |
144 | gpio_free(output->hpd_gpio); |
145 | return err; | |
d8f4a9ed TR |
146 | } |
147 | ||
148 | output->hpd_irq = err; | |
149 | ||
150 | flags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | | |
151 | IRQF_ONESHOT; | |
152 | ||
153 | err = request_threaded_irq(output->hpd_irq, NULL, hpd_irq, | |
154 | flags, "hpd", output); | |
155 | if (err < 0) { | |
156 | dev_err(output->dev, "failed to request IRQ#%u: %d\n", | |
157 | output->hpd_irq, err); | |
59d29c0e TR |
158 | gpio_free(output->hpd_gpio); |
159 | return err; | |
d8f4a9ed TR |
160 | } |
161 | ||
162 | output->connector.polled = DRM_CONNECTOR_POLL_HPD; | |
8fc8f7da TR |
163 | |
164 | /* | |
165 | * Disable the interrupt until the connector has been | |
166 | * initialized to avoid a race in the hotplug interrupt | |
167 | * handler. | |
168 | */ | |
169 | disable_irq(output->hpd_irq); | |
d8f4a9ed TR |
170 | } |
171 | ||
59d29c0e TR |
172 | return 0; |
173 | } | |
174 | ||
328ec69e | 175 | void tegra_output_remove(struct tegra_output *output) |
59d29c0e TR |
176 | { |
177 | if (gpio_is_valid(output->hpd_gpio)) { | |
178 | free_irq(output->hpd_irq, output); | |
179 | gpio_free(output->hpd_gpio); | |
180 | } | |
181 | ||
182 | if (output->ddc) | |
183 | put_device(&output->ddc->dev); | |
59d29c0e TR |
184 | } |
185 | ||
186 | int tegra_output_init(struct drm_device *drm, struct tegra_output *output) | |
187 | { | |
ea130b24 | 188 | int err; |
d8f4a9ed | 189 | |
ea130b24 TR |
190 | if (output->panel) { |
191 | err = drm_panel_attach(output->panel, &output->connector); | |
192 | if (err < 0) | |
193 | return err; | |
194 | } | |
d8f4a9ed | 195 | |
8fc8f7da TR |
196 | /* |
197 | * The connector is now registered and ready to receive hotplug events | |
198 | * so the hotplug interrupt can be enabled. | |
199 | */ | |
200 | if (gpio_is_valid(output->hpd_gpio)) | |
201 | enable_irq(output->hpd_irq); | |
202 | ||
d8f4a9ed | 203 | return 0; |
d8f4a9ed TR |
204 | } |
205 | ||
328ec69e | 206 | void tegra_output_exit(struct tegra_output *output) |
d8f4a9ed | 207 | { |
8fc8f7da TR |
208 | /* |
209 | * The connector is going away, so the interrupt must be disabled to | |
210 | * prevent the hotplug interrupt handler from potentially crashing. | |
211 | */ | |
212 | if (gpio_is_valid(output->hpd_gpio)) | |
213 | disable_irq(output->hpd_irq); | |
214 | ||
9aaa0ceb TR |
215 | if (output->panel) |
216 | drm_panel_detach(output->panel); | |
d8f4a9ed | 217 | } |