Commit | Line | Data |
---|---|---|
16ea975e RC |
1 | /* |
2 | * Copyright (C) 2012 Texas Instruments | |
3 | * Author: Rob Clark <robdclark@gmail.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License version 2 as published by | |
7 | * the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program. If not, see <http://www.gnu.org/licenses/>. | |
16 | */ | |
17 | ||
18 | #include <linux/i2c.h> | |
16ea975e RC |
19 | #include <linux/gpio.h> |
20 | #include <linux/of_gpio.h> | |
21 | #include <linux/pinctrl/pinmux.h> | |
22 | #include <linux/pinctrl/consumer.h> | |
23 | ||
24 | #include "tilcdc_drv.h" | |
25 | ||
26 | struct tfp410_module { | |
27 | struct tilcdc_module base; | |
28 | struct i2c_adapter *i2c; | |
29 | int gpio; | |
30 | }; | |
31 | #define to_tfp410_module(x) container_of(x, struct tfp410_module, base) | |
32 | ||
33 | ||
34 | static const struct tilcdc_panel_info dvi_info = { | |
35 | .ac_bias = 255, | |
36 | .ac_bias_intrpt = 0, | |
37 | .dma_burst_sz = 16, | |
38 | .bpp = 16, | |
39 | .fdd = 0x80, | |
40 | .tft_alt_mode = 0, | |
41 | .sync_edge = 0, | |
42 | .sync_ctrl = 1, | |
43 | .raster_order = 0, | |
44 | }; | |
45 | ||
46 | /* | |
47 | * Encoder: | |
48 | */ | |
49 | ||
50 | struct tfp410_encoder { | |
51 | struct drm_encoder base; | |
52 | struct tfp410_module *mod; | |
53 | int dpms; | |
54 | }; | |
55 | #define to_tfp410_encoder(x) container_of(x, struct tfp410_encoder, base) | |
56 | ||
16ea975e RC |
57 | static void tfp410_encoder_dpms(struct drm_encoder *encoder, int mode) |
58 | { | |
59 | struct tfp410_encoder *tfp410_encoder = to_tfp410_encoder(encoder); | |
60 | ||
61 | if (tfp410_encoder->dpms == mode) | |
62 | return; | |
63 | ||
64 | if (mode == DRM_MODE_DPMS_ON) { | |
65 | DBG("Power on"); | |
66 | gpio_direction_output(tfp410_encoder->mod->gpio, 1); | |
67 | } else { | |
68 | DBG("Power off"); | |
69 | gpio_direction_output(tfp410_encoder->mod->gpio, 0); | |
70 | } | |
71 | ||
72 | tfp410_encoder->dpms = mode; | |
73 | } | |
74 | ||
16ea975e RC |
75 | static void tfp410_encoder_prepare(struct drm_encoder *encoder) |
76 | { | |
77 | tfp410_encoder_dpms(encoder, DRM_MODE_DPMS_OFF); | |
78 | tilcdc_crtc_set_panel_info(encoder->crtc, &dvi_info); | |
79 | } | |
80 | ||
81 | static void tfp410_encoder_commit(struct drm_encoder *encoder) | |
82 | { | |
83 | tfp410_encoder_dpms(encoder, DRM_MODE_DPMS_ON); | |
84 | } | |
85 | ||
86 | static void tfp410_encoder_mode_set(struct drm_encoder *encoder, | |
87 | struct drm_display_mode *mode, | |
88 | struct drm_display_mode *adjusted_mode) | |
89 | { | |
90 | /* nothing needed */ | |
91 | } | |
92 | ||
93 | static const struct drm_encoder_funcs tfp410_encoder_funcs = { | |
d0ec32ca | 94 | .destroy = drm_encoder_cleanup, |
16ea975e RC |
95 | }; |
96 | ||
97 | static const struct drm_encoder_helper_funcs tfp410_encoder_helper_funcs = { | |
98 | .dpms = tfp410_encoder_dpms, | |
16ea975e RC |
99 | .prepare = tfp410_encoder_prepare, |
100 | .commit = tfp410_encoder_commit, | |
101 | .mode_set = tfp410_encoder_mode_set, | |
102 | }; | |
103 | ||
104 | static struct drm_encoder *tfp410_encoder_create(struct drm_device *dev, | |
105 | struct tfp410_module *mod) | |
106 | { | |
107 | struct tfp410_encoder *tfp410_encoder; | |
108 | struct drm_encoder *encoder; | |
109 | int ret; | |
110 | ||
d0ec32ca JS |
111 | tfp410_encoder = devm_kzalloc(dev->dev, sizeof(*tfp410_encoder), |
112 | GFP_KERNEL); | |
16ea975e RC |
113 | if (!tfp410_encoder) { |
114 | dev_err(dev->dev, "allocation failed\n"); | |
115 | return NULL; | |
116 | } | |
117 | ||
118 | tfp410_encoder->dpms = DRM_MODE_DPMS_OFF; | |
119 | tfp410_encoder->mod = mod; | |
120 | ||
121 | encoder = &tfp410_encoder->base; | |
122 | encoder->possible_crtcs = 1; | |
123 | ||
124 | ret = drm_encoder_init(dev, encoder, &tfp410_encoder_funcs, | |
13a3d91f | 125 | DRM_MODE_ENCODER_TMDS, NULL); |
16ea975e RC |
126 | if (ret < 0) |
127 | goto fail; | |
128 | ||
129 | drm_encoder_helper_add(encoder, &tfp410_encoder_helper_funcs); | |
130 | ||
131 | return encoder; | |
132 | ||
133 | fail: | |
d0ec32ca | 134 | drm_encoder_cleanup(encoder); |
16ea975e RC |
135 | return NULL; |
136 | } | |
137 | ||
138 | /* | |
139 | * Connector: | |
140 | */ | |
141 | ||
142 | struct tfp410_connector { | |
143 | struct drm_connector base; | |
144 | ||
145 | struct drm_encoder *encoder; /* our connected encoder */ | |
146 | struct tfp410_module *mod; | |
147 | }; | |
148 | #define to_tfp410_connector(x) container_of(x, struct tfp410_connector, base) | |
149 | ||
150 | ||
151 | static void tfp410_connector_destroy(struct drm_connector *connector) | |
152 | { | |
62eb3e20 | 153 | drm_connector_unregister(connector); |
16ea975e | 154 | drm_connector_cleanup(connector); |
16ea975e RC |
155 | } |
156 | ||
157 | static enum drm_connector_status tfp410_connector_detect( | |
158 | struct drm_connector *connector, | |
159 | bool force) | |
160 | { | |
161 | struct tfp410_connector *tfp410_connector = to_tfp410_connector(connector); | |
162 | ||
163 | if (drm_probe_ddc(tfp410_connector->mod->i2c)) | |
164 | return connector_status_connected; | |
165 | ||
166 | return connector_status_unknown; | |
167 | } | |
168 | ||
169 | static int tfp410_connector_get_modes(struct drm_connector *connector) | |
170 | { | |
171 | struct tfp410_connector *tfp410_connector = to_tfp410_connector(connector); | |
172 | struct edid *edid; | |
173 | int ret = 0; | |
174 | ||
175 | edid = drm_get_edid(connector, tfp410_connector->mod->i2c); | |
176 | ||
177 | drm_mode_connector_update_edid_property(connector, edid); | |
178 | ||
179 | if (edid) { | |
180 | ret = drm_add_edid_modes(connector, edid); | |
181 | kfree(edid); | |
182 | } | |
183 | ||
184 | return ret; | |
185 | } | |
186 | ||
187 | static int tfp410_connector_mode_valid(struct drm_connector *connector, | |
188 | struct drm_display_mode *mode) | |
189 | { | |
190 | struct tilcdc_drm_private *priv = connector->dev->dev_private; | |
191 | /* our only constraints are what the crtc can generate: */ | |
192 | return tilcdc_crtc_mode_valid(priv->crtc, mode); | |
193 | } | |
194 | ||
195 | static struct drm_encoder *tfp410_connector_best_encoder( | |
196 | struct drm_connector *connector) | |
197 | { | |
198 | struct tfp410_connector *tfp410_connector = to_tfp410_connector(connector); | |
199 | return tfp410_connector->encoder; | |
200 | } | |
201 | ||
202 | static const struct drm_connector_funcs tfp410_connector_funcs = { | |
203 | .destroy = tfp410_connector_destroy, | |
204 | .dpms = drm_helper_connector_dpms, | |
205 | .detect = tfp410_connector_detect, | |
206 | .fill_modes = drm_helper_probe_single_connector_modes, | |
207 | }; | |
208 | ||
209 | static const struct drm_connector_helper_funcs tfp410_connector_helper_funcs = { | |
210 | .get_modes = tfp410_connector_get_modes, | |
211 | .mode_valid = tfp410_connector_mode_valid, | |
212 | .best_encoder = tfp410_connector_best_encoder, | |
213 | }; | |
214 | ||
215 | static struct drm_connector *tfp410_connector_create(struct drm_device *dev, | |
216 | struct tfp410_module *mod, struct drm_encoder *encoder) | |
217 | { | |
218 | struct tfp410_connector *tfp410_connector; | |
219 | struct drm_connector *connector; | |
220 | int ret; | |
221 | ||
d0ec32ca JS |
222 | tfp410_connector = devm_kzalloc(dev->dev, sizeof(*tfp410_connector), |
223 | GFP_KERNEL); | |
16ea975e RC |
224 | if (!tfp410_connector) { |
225 | dev_err(dev->dev, "allocation failed\n"); | |
226 | return NULL; | |
227 | } | |
228 | ||
229 | tfp410_connector->encoder = encoder; | |
230 | tfp410_connector->mod = mod; | |
231 | ||
232 | connector = &tfp410_connector->base; | |
233 | ||
234 | drm_connector_init(dev, connector, &tfp410_connector_funcs, | |
235 | DRM_MODE_CONNECTOR_DVID); | |
236 | drm_connector_helper_add(connector, &tfp410_connector_helper_funcs); | |
237 | ||
238 | connector->polled = DRM_CONNECTOR_POLL_CONNECT | | |
239 | DRM_CONNECTOR_POLL_DISCONNECT; | |
240 | ||
241 | connector->interlace_allowed = 0; | |
242 | connector->doublescan_allowed = 0; | |
243 | ||
244 | ret = drm_mode_connector_attach_encoder(connector, encoder); | |
245 | if (ret) | |
246 | goto fail; | |
247 | ||
34ea3d38 | 248 | drm_connector_register(connector); |
16ea975e RC |
249 | |
250 | return connector; | |
251 | ||
252 | fail: | |
253 | tfp410_connector_destroy(connector); | |
254 | return NULL; | |
255 | } | |
256 | ||
257 | /* | |
258 | * Module: | |
259 | */ | |
260 | ||
261 | static int tfp410_modeset_init(struct tilcdc_module *mod, struct drm_device *dev) | |
262 | { | |
263 | struct tfp410_module *tfp410_mod = to_tfp410_module(mod); | |
264 | struct tilcdc_drm_private *priv = dev->dev_private; | |
265 | struct drm_encoder *encoder; | |
266 | struct drm_connector *connector; | |
267 | ||
268 | encoder = tfp410_encoder_create(dev, tfp410_mod); | |
269 | if (!encoder) | |
270 | return -ENOMEM; | |
271 | ||
272 | connector = tfp410_connector_create(dev, tfp410_mod, encoder); | |
273 | if (!connector) | |
274 | return -ENOMEM; | |
275 | ||
276 | priv->encoders[priv->num_encoders++] = encoder; | |
277 | priv->connectors[priv->num_connectors++] = connector; | |
278 | ||
279 | return 0; | |
280 | } | |
281 | ||
16ea975e RC |
282 | static const struct tilcdc_module_ops tfp410_module_ops = { |
283 | .modeset_init = tfp410_modeset_init, | |
16ea975e RC |
284 | }; |
285 | ||
286 | /* | |
287 | * Device: | |
288 | */ | |
289 | ||
290 | static struct of_device_id tfp410_of_match[]; | |
291 | ||
292 | static int tfp410_probe(struct platform_device *pdev) | |
293 | { | |
294 | struct device_node *node = pdev->dev.of_node; | |
295 | struct device_node *i2c_node; | |
296 | struct tfp410_module *tfp410_mod; | |
297 | struct tilcdc_module *mod; | |
298 | struct pinctrl *pinctrl; | |
299 | uint32_t i2c_phandle; | |
300 | int ret = -EINVAL; | |
301 | ||
302 | /* bail out early if no DT data: */ | |
303 | if (!node) { | |
304 | dev_err(&pdev->dev, "device-tree data is missing\n"); | |
305 | return -ENXIO; | |
306 | } | |
307 | ||
d0ec32ca | 308 | tfp410_mod = devm_kzalloc(&pdev->dev, sizeof(*tfp410_mod), GFP_KERNEL); |
16ea975e RC |
309 | if (!tfp410_mod) |
310 | return -ENOMEM; | |
311 | ||
312 | mod = &tfp410_mod->base; | |
7cdcce9f | 313 | pdev->dev.platform_data = mod; |
16ea975e RC |
314 | |
315 | tilcdc_module_init(mod, "tfp410", &tfp410_module_ops); | |
316 | ||
317 | pinctrl = devm_pinctrl_get_select_default(&pdev->dev); | |
318 | if (IS_ERR(pinctrl)) | |
319 | dev_warn(&pdev->dev, "pins are not configured\n"); | |
320 | ||
321 | if (of_property_read_u32(node, "i2c", &i2c_phandle)) { | |
322 | dev_err(&pdev->dev, "could not get i2c bus phandle\n"); | |
323 | goto fail; | |
324 | } | |
325 | ||
dc28aa07 BP |
326 | mod->preferred_bpp = dvi_info.bpp; |
327 | ||
16ea975e RC |
328 | i2c_node = of_find_node_by_phandle(i2c_phandle); |
329 | if (!i2c_node) { | |
330 | dev_err(&pdev->dev, "could not get i2c bus node\n"); | |
331 | goto fail; | |
332 | } | |
333 | ||
334 | tfp410_mod->i2c = of_find_i2c_adapter_by_node(i2c_node); | |
335 | if (!tfp410_mod->i2c) { | |
336 | dev_err(&pdev->dev, "could not get i2c\n"); | |
7cdcce9f | 337 | of_node_put(i2c_node); |
16ea975e RC |
338 | goto fail; |
339 | } | |
340 | ||
341 | of_node_put(i2c_node); | |
342 | ||
343 | tfp410_mod->gpio = of_get_named_gpio_flags(node, "powerdn-gpio", | |
344 | 0, NULL); | |
287980e4 | 345 | if (tfp410_mod->gpio < 0) { |
16ea975e RC |
346 | dev_warn(&pdev->dev, "No power down GPIO\n"); |
347 | } else { | |
348 | ret = gpio_request(tfp410_mod->gpio, "DVI_PDn"); | |
349 | if (ret) { | |
350 | dev_err(&pdev->dev, "could not get DVI_PDn gpio\n"); | |
7cdcce9f | 351 | goto fail_adapter; |
16ea975e RC |
352 | } |
353 | } | |
354 | ||
355 | return 0; | |
356 | ||
7cdcce9f GM |
357 | fail_adapter: |
358 | i2c_put_adapter(tfp410_mod->i2c); | |
359 | ||
16ea975e | 360 | fail: |
7cdcce9f | 361 | tilcdc_module_cleanup(mod); |
16ea975e RC |
362 | return ret; |
363 | } | |
364 | ||
365 | static int tfp410_remove(struct platform_device *pdev) | |
366 | { | |
7cdcce9f GM |
367 | struct tilcdc_module *mod = dev_get_platdata(&pdev->dev); |
368 | struct tfp410_module *tfp410_mod = to_tfp410_module(mod); | |
369 | ||
370 | i2c_put_adapter(tfp410_mod->i2c); | |
371 | gpio_free(tfp410_mod->gpio); | |
372 | ||
373 | tilcdc_module_cleanup(mod); | |
7cdcce9f | 374 | |
16ea975e RC |
375 | return 0; |
376 | } | |
377 | ||
378 | static struct of_device_id tfp410_of_match[] = { | |
379 | { .compatible = "ti,tilcdc,tfp410", }, | |
380 | { }, | |
381 | }; | |
16ea975e RC |
382 | |
383 | struct platform_driver tfp410_driver = { | |
384 | .probe = tfp410_probe, | |
385 | .remove = tfp410_remove, | |
386 | .driver = { | |
387 | .owner = THIS_MODULE, | |
388 | .name = "tfp410", | |
389 | .of_match_table = tfp410_of_match, | |
390 | }, | |
391 | }; | |
392 | ||
393 | int __init tilcdc_tfp410_init(void) | |
394 | { | |
395 | return platform_driver_register(&tfp410_driver); | |
396 | } | |
397 | ||
398 | void __exit tilcdc_tfp410_fini(void) | |
399 | { | |
400 | platform_driver_unregister(&tfp410_driver); | |
401 | } |