Commit | Line | Data |
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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 TR |
11 | |
12 | #include "drm.h" | |
13 | ||
14 | static int tegra_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 | if (output->edid) | |
21 | edid = kmemdup(output->edid, sizeof(*edid), GFP_KERNEL); | |
22 | else if (output->ddc) | |
23 | edid = drm_get_edid(connector, output->ddc); | |
24 | ||
25 | drm_mode_connector_update_edid_property(connector, edid); | |
26 | ||
27 | if (edid) { | |
28 | err = drm_add_edid_modes(connector, edid); | |
29 | kfree(edid); | |
30 | } | |
31 | ||
32 | return err; | |
33 | } | |
34 | ||
35 | static int tegra_connector_mode_valid(struct drm_connector *connector, | |
36 | struct drm_display_mode *mode) | |
37 | { | |
38 | struct tegra_output *output = connector_to_output(connector); | |
39 | enum drm_mode_status status = MODE_OK; | |
40 | int err; | |
41 | ||
42 | err = tegra_output_check_mode(output, mode, &status); | |
43 | if (err < 0) | |
44 | return MODE_ERROR; | |
45 | ||
46 | return status; | |
47 | } | |
48 | ||
49 | static struct drm_encoder * | |
50 | tegra_connector_best_encoder(struct drm_connector *connector) | |
51 | { | |
52 | struct tegra_output *output = connector_to_output(connector); | |
53 | ||
54 | return &output->encoder; | |
55 | } | |
56 | ||
57 | static const struct drm_connector_helper_funcs connector_helper_funcs = { | |
58 | .get_modes = tegra_connector_get_modes, | |
59 | .mode_valid = tegra_connector_mode_valid, | |
60 | .best_encoder = tegra_connector_best_encoder, | |
61 | }; | |
62 | ||
63 | static enum drm_connector_status | |
64 | tegra_connector_detect(struct drm_connector *connector, bool force) | |
65 | { | |
66 | struct tegra_output *output = connector_to_output(connector); | |
67 | enum drm_connector_status status = connector_status_unknown; | |
68 | ||
69 | if (gpio_is_valid(output->hpd_gpio)) { | |
70 | if (gpio_get_value(output->hpd_gpio) == 0) | |
71 | status = connector_status_disconnected; | |
72 | else | |
73 | status = connector_status_connected; | |
74 | } else { | |
75 | if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS) | |
76 | status = connector_status_connected; | |
77 | } | |
78 | ||
79 | return status; | |
80 | } | |
81 | ||
f002abc1 TR |
82 | static void drm_connector_clear(struct drm_connector *connector) |
83 | { | |
84 | memset(connector, 0, sizeof(*connector)); | |
85 | } | |
86 | ||
d8f4a9ed TR |
87 | static void tegra_connector_destroy(struct drm_connector *connector) |
88 | { | |
89 | drm_sysfs_connector_remove(connector); | |
90 | drm_connector_cleanup(connector); | |
f002abc1 | 91 | drm_connector_clear(connector); |
d8f4a9ed TR |
92 | } |
93 | ||
94 | static const struct drm_connector_funcs connector_funcs = { | |
95 | .dpms = drm_helper_connector_dpms, | |
96 | .detect = tegra_connector_detect, | |
97 | .fill_modes = drm_helper_probe_single_connector_modes, | |
98 | .destroy = tegra_connector_destroy, | |
99 | }; | |
100 | ||
f002abc1 TR |
101 | static void drm_encoder_clear(struct drm_encoder *encoder) |
102 | { | |
103 | memset(encoder, 0, sizeof(*encoder)); | |
104 | } | |
105 | ||
d8f4a9ed TR |
106 | static void tegra_encoder_destroy(struct drm_encoder *encoder) |
107 | { | |
108 | drm_encoder_cleanup(encoder); | |
f002abc1 | 109 | drm_encoder_clear(encoder); |
d8f4a9ed TR |
110 | } |
111 | ||
112 | static const struct drm_encoder_funcs encoder_funcs = { | |
113 | .destroy = tegra_encoder_destroy, | |
114 | }; | |
115 | ||
116 | static void tegra_encoder_dpms(struct drm_encoder *encoder, int mode) | |
117 | { | |
118 | } | |
119 | ||
120 | static bool tegra_encoder_mode_fixup(struct drm_encoder *encoder, | |
121 | const struct drm_display_mode *mode, | |
122 | struct drm_display_mode *adjusted) | |
123 | { | |
124 | return true; | |
125 | } | |
126 | ||
127 | static void tegra_encoder_prepare(struct drm_encoder *encoder) | |
128 | { | |
129 | } | |
130 | ||
131 | static void tegra_encoder_commit(struct drm_encoder *encoder) | |
132 | { | |
133 | } | |
134 | ||
135 | static void tegra_encoder_mode_set(struct drm_encoder *encoder, | |
136 | struct drm_display_mode *mode, | |
137 | struct drm_display_mode *adjusted) | |
138 | { | |
139 | struct tegra_output *output = encoder_to_output(encoder); | |
140 | int err; | |
141 | ||
142 | err = tegra_output_enable(output); | |
143 | if (err < 0) | |
144 | dev_err(encoder->dev->dev, "tegra_output_enable(): %d\n", err); | |
145 | } | |
146 | ||
147 | static const struct drm_encoder_helper_funcs encoder_helper_funcs = { | |
148 | .dpms = tegra_encoder_dpms, | |
149 | .mode_fixup = tegra_encoder_mode_fixup, | |
150 | .prepare = tegra_encoder_prepare, | |
151 | .commit = tegra_encoder_commit, | |
152 | .mode_set = tegra_encoder_mode_set, | |
153 | }; | |
154 | ||
155 | static irqreturn_t hpd_irq(int irq, void *data) | |
156 | { | |
157 | struct tegra_output *output = data; | |
158 | ||
159 | drm_helper_hpd_irq_event(output->connector.dev); | |
160 | ||
161 | return IRQ_HANDLED; | |
162 | } | |
163 | ||
164 | int tegra_output_parse_dt(struct tegra_output *output) | |
165 | { | |
166 | enum of_gpio_flags flags; | |
167 | struct device_node *ddc; | |
168 | size_t size; | |
169 | int err; | |
170 | ||
171 | if (!output->of_node) | |
172 | output->of_node = output->dev->of_node; | |
173 | ||
174 | output->edid = of_get_property(output->of_node, "nvidia,edid", &size); | |
175 | ||
176 | ddc = of_parse_phandle(output->of_node, "nvidia,ddc-i2c-bus", 0); | |
177 | if (ddc) { | |
178 | output->ddc = of_find_i2c_adapter_by_node(ddc); | |
179 | if (!output->ddc) { | |
180 | err = -EPROBE_DEFER; | |
181 | of_node_put(ddc); | |
182 | return err; | |
183 | } | |
184 | ||
185 | of_node_put(ddc); | |
186 | } | |
187 | ||
188 | if (!output->edid && !output->ddc) | |
189 | return -ENODEV; | |
190 | ||
191 | output->hpd_gpio = of_get_named_gpio_flags(output->of_node, | |
192 | "nvidia,hpd-gpio", 0, | |
193 | &flags); | |
194 | ||
195 | return 0; | |
196 | } | |
197 | ||
198 | int tegra_output_init(struct drm_device *drm, struct tegra_output *output) | |
199 | { | |
200 | int connector, encoder, err; | |
201 | ||
202 | if (gpio_is_valid(output->hpd_gpio)) { | |
203 | unsigned long flags; | |
204 | ||
205 | err = gpio_request_one(output->hpd_gpio, GPIOF_DIR_IN, | |
206 | "HDMI hotplug detect"); | |
207 | if (err < 0) { | |
208 | dev_err(output->dev, "gpio_request_one(): %d\n", err); | |
209 | return err; | |
210 | } | |
211 | ||
212 | err = gpio_to_irq(output->hpd_gpio); | |
213 | if (err < 0) { | |
214 | dev_err(output->dev, "gpio_to_irq(): %d\n", err); | |
215 | goto free_hpd; | |
216 | } | |
217 | ||
218 | output->hpd_irq = err; | |
219 | ||
220 | flags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | | |
221 | IRQF_ONESHOT; | |
222 | ||
223 | err = request_threaded_irq(output->hpd_irq, NULL, hpd_irq, | |
224 | flags, "hpd", output); | |
225 | if (err < 0) { | |
226 | dev_err(output->dev, "failed to request IRQ#%u: %d\n", | |
227 | output->hpd_irq, err); | |
228 | goto free_hpd; | |
229 | } | |
230 | ||
231 | output->connector.polled = DRM_CONNECTOR_POLL_HPD; | |
232 | } | |
233 | ||
234 | switch (output->type) { | |
235 | case TEGRA_OUTPUT_RGB: | |
236 | connector = DRM_MODE_CONNECTOR_LVDS; | |
237 | encoder = DRM_MODE_ENCODER_LVDS; | |
238 | break; | |
239 | ||
edec4af4 TR |
240 | case TEGRA_OUTPUT_HDMI: |
241 | connector = DRM_MODE_CONNECTOR_HDMIA; | |
242 | encoder = DRM_MODE_ENCODER_TMDS; | |
243 | break; | |
244 | ||
d8f4a9ed TR |
245 | default: |
246 | connector = DRM_MODE_CONNECTOR_Unknown; | |
247 | encoder = DRM_MODE_ENCODER_NONE; | |
248 | break; | |
249 | } | |
250 | ||
251 | drm_connector_init(drm, &output->connector, &connector_funcs, | |
252 | connector); | |
253 | drm_connector_helper_add(&output->connector, &connector_helper_funcs); | |
254 | ||
255 | drm_encoder_init(drm, &output->encoder, &encoder_funcs, encoder); | |
256 | drm_encoder_helper_add(&output->encoder, &encoder_helper_funcs); | |
257 | ||
258 | drm_mode_connector_attach_encoder(&output->connector, &output->encoder); | |
259 | drm_sysfs_connector_add(&output->connector); | |
260 | ||
261 | output->encoder.possible_crtcs = 0x3; | |
262 | ||
263 | return 0; | |
264 | ||
265 | free_hpd: | |
266 | gpio_free(output->hpd_gpio); | |
267 | ||
268 | return err; | |
269 | } | |
270 | ||
271 | int tegra_output_exit(struct tegra_output *output) | |
272 | { | |
273 | if (gpio_is_valid(output->hpd_gpio)) { | |
274 | free_irq(output->hpd_irq, output); | |
275 | gpio_free(output->hpd_gpio); | |
276 | } | |
277 | ||
278 | if (output->ddc) | |
279 | put_device(&output->ddc->dev); | |
280 | ||
281 | return 0; | |
282 | } |