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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 | ||
57 | ||
58 | static void tfp410_encoder_destroy(struct drm_encoder *encoder) | |
59 | { | |
60 | struct tfp410_encoder *tfp410_encoder = to_tfp410_encoder(encoder); | |
61 | drm_encoder_cleanup(encoder); | |
62 | kfree(tfp410_encoder); | |
63 | } | |
64 | ||
65 | static void tfp410_encoder_dpms(struct drm_encoder *encoder, int mode) | |
66 | { | |
67 | struct tfp410_encoder *tfp410_encoder = to_tfp410_encoder(encoder); | |
68 | ||
69 | if (tfp410_encoder->dpms == mode) | |
70 | return; | |
71 | ||
72 | if (mode == DRM_MODE_DPMS_ON) { | |
73 | DBG("Power on"); | |
74 | gpio_direction_output(tfp410_encoder->mod->gpio, 1); | |
75 | } else { | |
76 | DBG("Power off"); | |
77 | gpio_direction_output(tfp410_encoder->mod->gpio, 0); | |
78 | } | |
79 | ||
80 | tfp410_encoder->dpms = mode; | |
81 | } | |
82 | ||
83 | static bool tfp410_encoder_mode_fixup(struct drm_encoder *encoder, | |
84 | const struct drm_display_mode *mode, | |
85 | struct drm_display_mode *adjusted_mode) | |
86 | { | |
87 | /* nothing needed */ | |
88 | return true; | |
89 | } | |
90 | ||
91 | static void tfp410_encoder_prepare(struct drm_encoder *encoder) | |
92 | { | |
93 | tfp410_encoder_dpms(encoder, DRM_MODE_DPMS_OFF); | |
94 | tilcdc_crtc_set_panel_info(encoder->crtc, &dvi_info); | |
95 | } | |
96 | ||
97 | static void tfp410_encoder_commit(struct drm_encoder *encoder) | |
98 | { | |
99 | tfp410_encoder_dpms(encoder, DRM_MODE_DPMS_ON); | |
100 | } | |
101 | ||
102 | static void tfp410_encoder_mode_set(struct drm_encoder *encoder, | |
103 | struct drm_display_mode *mode, | |
104 | struct drm_display_mode *adjusted_mode) | |
105 | { | |
106 | /* nothing needed */ | |
107 | } | |
108 | ||
109 | static const struct drm_encoder_funcs tfp410_encoder_funcs = { | |
110 | .destroy = tfp410_encoder_destroy, | |
111 | }; | |
112 | ||
113 | static const struct drm_encoder_helper_funcs tfp410_encoder_helper_funcs = { | |
114 | .dpms = tfp410_encoder_dpms, | |
115 | .mode_fixup = tfp410_encoder_mode_fixup, | |
116 | .prepare = tfp410_encoder_prepare, | |
117 | .commit = tfp410_encoder_commit, | |
118 | .mode_set = tfp410_encoder_mode_set, | |
119 | }; | |
120 | ||
121 | static struct drm_encoder *tfp410_encoder_create(struct drm_device *dev, | |
122 | struct tfp410_module *mod) | |
123 | { | |
124 | struct tfp410_encoder *tfp410_encoder; | |
125 | struct drm_encoder *encoder; | |
126 | int ret; | |
127 | ||
128 | tfp410_encoder = kzalloc(sizeof(*tfp410_encoder), GFP_KERNEL); | |
129 | if (!tfp410_encoder) { | |
130 | dev_err(dev->dev, "allocation failed\n"); | |
131 | return NULL; | |
132 | } | |
133 | ||
134 | tfp410_encoder->dpms = DRM_MODE_DPMS_OFF; | |
135 | tfp410_encoder->mod = mod; | |
136 | ||
137 | encoder = &tfp410_encoder->base; | |
138 | encoder->possible_crtcs = 1; | |
139 | ||
140 | ret = drm_encoder_init(dev, encoder, &tfp410_encoder_funcs, | |
13a3d91f | 141 | DRM_MODE_ENCODER_TMDS, NULL); |
16ea975e RC |
142 | if (ret < 0) |
143 | goto fail; | |
144 | ||
145 | drm_encoder_helper_add(encoder, &tfp410_encoder_helper_funcs); | |
146 | ||
147 | return encoder; | |
148 | ||
149 | fail: | |
150 | tfp410_encoder_destroy(encoder); | |
151 | return NULL; | |
152 | } | |
153 | ||
154 | /* | |
155 | * Connector: | |
156 | */ | |
157 | ||
158 | struct tfp410_connector { | |
159 | struct drm_connector base; | |
160 | ||
161 | struct drm_encoder *encoder; /* our connected encoder */ | |
162 | struct tfp410_module *mod; | |
163 | }; | |
164 | #define to_tfp410_connector(x) container_of(x, struct tfp410_connector, base) | |
165 | ||
166 | ||
167 | static void tfp410_connector_destroy(struct drm_connector *connector) | |
168 | { | |
169 | struct tfp410_connector *tfp410_connector = to_tfp410_connector(connector); | |
62eb3e20 | 170 | drm_connector_unregister(connector); |
16ea975e RC |
171 | drm_connector_cleanup(connector); |
172 | kfree(tfp410_connector); | |
173 | } | |
174 | ||
175 | static enum drm_connector_status tfp410_connector_detect( | |
176 | struct drm_connector *connector, | |
177 | bool force) | |
178 | { | |
179 | struct tfp410_connector *tfp410_connector = to_tfp410_connector(connector); | |
180 | ||
181 | if (drm_probe_ddc(tfp410_connector->mod->i2c)) | |
182 | return connector_status_connected; | |
183 | ||
184 | return connector_status_unknown; | |
185 | } | |
186 | ||
187 | static int tfp410_connector_get_modes(struct drm_connector *connector) | |
188 | { | |
189 | struct tfp410_connector *tfp410_connector = to_tfp410_connector(connector); | |
190 | struct edid *edid; | |
191 | int ret = 0; | |
192 | ||
193 | edid = drm_get_edid(connector, tfp410_connector->mod->i2c); | |
194 | ||
195 | drm_mode_connector_update_edid_property(connector, edid); | |
196 | ||
197 | if (edid) { | |
198 | ret = drm_add_edid_modes(connector, edid); | |
199 | kfree(edid); | |
200 | } | |
201 | ||
202 | return ret; | |
203 | } | |
204 | ||
205 | static int tfp410_connector_mode_valid(struct drm_connector *connector, | |
206 | struct drm_display_mode *mode) | |
207 | { | |
208 | struct tilcdc_drm_private *priv = connector->dev->dev_private; | |
209 | /* our only constraints are what the crtc can generate: */ | |
210 | return tilcdc_crtc_mode_valid(priv->crtc, mode); | |
211 | } | |
212 | ||
213 | static struct drm_encoder *tfp410_connector_best_encoder( | |
214 | struct drm_connector *connector) | |
215 | { | |
216 | struct tfp410_connector *tfp410_connector = to_tfp410_connector(connector); | |
217 | return tfp410_connector->encoder; | |
218 | } | |
219 | ||
220 | static const struct drm_connector_funcs tfp410_connector_funcs = { | |
221 | .destroy = tfp410_connector_destroy, | |
222 | .dpms = drm_helper_connector_dpms, | |
223 | .detect = tfp410_connector_detect, | |
224 | .fill_modes = drm_helper_probe_single_connector_modes, | |
225 | }; | |
226 | ||
227 | static const struct drm_connector_helper_funcs tfp410_connector_helper_funcs = { | |
228 | .get_modes = tfp410_connector_get_modes, | |
229 | .mode_valid = tfp410_connector_mode_valid, | |
230 | .best_encoder = tfp410_connector_best_encoder, | |
231 | }; | |
232 | ||
233 | static struct drm_connector *tfp410_connector_create(struct drm_device *dev, | |
234 | struct tfp410_module *mod, struct drm_encoder *encoder) | |
235 | { | |
236 | struct tfp410_connector *tfp410_connector; | |
237 | struct drm_connector *connector; | |
238 | int ret; | |
239 | ||
240 | tfp410_connector = kzalloc(sizeof(*tfp410_connector), GFP_KERNEL); | |
241 | if (!tfp410_connector) { | |
242 | dev_err(dev->dev, "allocation failed\n"); | |
243 | return NULL; | |
244 | } | |
245 | ||
246 | tfp410_connector->encoder = encoder; | |
247 | tfp410_connector->mod = mod; | |
248 | ||
249 | connector = &tfp410_connector->base; | |
250 | ||
251 | drm_connector_init(dev, connector, &tfp410_connector_funcs, | |
252 | DRM_MODE_CONNECTOR_DVID); | |
253 | drm_connector_helper_add(connector, &tfp410_connector_helper_funcs); | |
254 | ||
255 | connector->polled = DRM_CONNECTOR_POLL_CONNECT | | |
256 | DRM_CONNECTOR_POLL_DISCONNECT; | |
257 | ||
258 | connector->interlace_allowed = 0; | |
259 | connector->doublescan_allowed = 0; | |
260 | ||
261 | ret = drm_mode_connector_attach_encoder(connector, encoder); | |
262 | if (ret) | |
263 | goto fail; | |
264 | ||
34ea3d38 | 265 | drm_connector_register(connector); |
16ea975e RC |
266 | |
267 | return connector; | |
268 | ||
269 | fail: | |
270 | tfp410_connector_destroy(connector); | |
271 | return NULL; | |
272 | } | |
273 | ||
274 | /* | |
275 | * Module: | |
276 | */ | |
277 | ||
278 | static int tfp410_modeset_init(struct tilcdc_module *mod, struct drm_device *dev) | |
279 | { | |
280 | struct tfp410_module *tfp410_mod = to_tfp410_module(mod); | |
281 | struct tilcdc_drm_private *priv = dev->dev_private; | |
282 | struct drm_encoder *encoder; | |
283 | struct drm_connector *connector; | |
284 | ||
285 | encoder = tfp410_encoder_create(dev, tfp410_mod); | |
286 | if (!encoder) | |
287 | return -ENOMEM; | |
288 | ||
289 | connector = tfp410_connector_create(dev, tfp410_mod, encoder); | |
290 | if (!connector) | |
291 | return -ENOMEM; | |
292 | ||
293 | priv->encoders[priv->num_encoders++] = encoder; | |
294 | priv->connectors[priv->num_connectors++] = connector; | |
295 | ||
296 | return 0; | |
297 | } | |
298 | ||
16ea975e RC |
299 | static const struct tilcdc_module_ops tfp410_module_ops = { |
300 | .modeset_init = tfp410_modeset_init, | |
16ea975e RC |
301 | }; |
302 | ||
303 | /* | |
304 | * Device: | |
305 | */ | |
306 | ||
307 | static struct of_device_id tfp410_of_match[]; | |
308 | ||
309 | static int tfp410_probe(struct platform_device *pdev) | |
310 | { | |
311 | struct device_node *node = pdev->dev.of_node; | |
312 | struct device_node *i2c_node; | |
313 | struct tfp410_module *tfp410_mod; | |
314 | struct tilcdc_module *mod; | |
315 | struct pinctrl *pinctrl; | |
316 | uint32_t i2c_phandle; | |
317 | int ret = -EINVAL; | |
318 | ||
319 | /* bail out early if no DT data: */ | |
320 | if (!node) { | |
321 | dev_err(&pdev->dev, "device-tree data is missing\n"); | |
322 | return -ENXIO; | |
323 | } | |
324 | ||
325 | tfp410_mod = kzalloc(sizeof(*tfp410_mod), GFP_KERNEL); | |
326 | if (!tfp410_mod) | |
327 | return -ENOMEM; | |
328 | ||
329 | mod = &tfp410_mod->base; | |
7cdcce9f | 330 | pdev->dev.platform_data = mod; |
16ea975e RC |
331 | |
332 | tilcdc_module_init(mod, "tfp410", &tfp410_module_ops); | |
333 | ||
334 | pinctrl = devm_pinctrl_get_select_default(&pdev->dev); | |
335 | if (IS_ERR(pinctrl)) | |
336 | dev_warn(&pdev->dev, "pins are not configured\n"); | |
337 | ||
338 | if (of_property_read_u32(node, "i2c", &i2c_phandle)) { | |
339 | dev_err(&pdev->dev, "could not get i2c bus phandle\n"); | |
340 | goto fail; | |
341 | } | |
342 | ||
dc28aa07 BP |
343 | mod->preferred_bpp = dvi_info.bpp; |
344 | ||
16ea975e RC |
345 | i2c_node = of_find_node_by_phandle(i2c_phandle); |
346 | if (!i2c_node) { | |
347 | dev_err(&pdev->dev, "could not get i2c bus node\n"); | |
348 | goto fail; | |
349 | } | |
350 | ||
351 | tfp410_mod->i2c = of_find_i2c_adapter_by_node(i2c_node); | |
352 | if (!tfp410_mod->i2c) { | |
353 | dev_err(&pdev->dev, "could not get i2c\n"); | |
7cdcce9f | 354 | of_node_put(i2c_node); |
16ea975e RC |
355 | goto fail; |
356 | } | |
357 | ||
358 | of_node_put(i2c_node); | |
359 | ||
360 | tfp410_mod->gpio = of_get_named_gpio_flags(node, "powerdn-gpio", | |
361 | 0, NULL); | |
362 | if (IS_ERR_VALUE(tfp410_mod->gpio)) { | |
363 | dev_warn(&pdev->dev, "No power down GPIO\n"); | |
364 | } else { | |
365 | ret = gpio_request(tfp410_mod->gpio, "DVI_PDn"); | |
366 | if (ret) { | |
367 | dev_err(&pdev->dev, "could not get DVI_PDn gpio\n"); | |
7cdcce9f | 368 | goto fail_adapter; |
16ea975e RC |
369 | } |
370 | } | |
371 | ||
372 | return 0; | |
373 | ||
7cdcce9f GM |
374 | fail_adapter: |
375 | i2c_put_adapter(tfp410_mod->i2c); | |
376 | ||
16ea975e | 377 | fail: |
7cdcce9f GM |
378 | kfree(tfp410_mod); |
379 | tilcdc_module_cleanup(mod); | |
16ea975e RC |
380 | return ret; |
381 | } | |
382 | ||
383 | static int tfp410_remove(struct platform_device *pdev) | |
384 | { | |
7cdcce9f GM |
385 | struct tilcdc_module *mod = dev_get_platdata(&pdev->dev); |
386 | struct tfp410_module *tfp410_mod = to_tfp410_module(mod); | |
387 | ||
388 | i2c_put_adapter(tfp410_mod->i2c); | |
389 | gpio_free(tfp410_mod->gpio); | |
390 | ||
391 | tilcdc_module_cleanup(mod); | |
392 | kfree(tfp410_mod); | |
393 | ||
16ea975e RC |
394 | return 0; |
395 | } | |
396 | ||
397 | static struct of_device_id tfp410_of_match[] = { | |
398 | { .compatible = "ti,tilcdc,tfp410", }, | |
399 | { }, | |
400 | }; | |
16ea975e RC |
401 | |
402 | struct platform_driver tfp410_driver = { | |
403 | .probe = tfp410_probe, | |
404 | .remove = tfp410_remove, | |
405 | .driver = { | |
406 | .owner = THIS_MODULE, | |
407 | .name = "tfp410", | |
408 | .of_match_table = tfp410_of_match, | |
409 | }, | |
410 | }; | |
411 | ||
412 | int __init tilcdc_tfp410_init(void) | |
413 | { | |
414 | return platform_driver_register(&tfp410_driver); | |
415 | } | |
416 | ||
417 | void __exit tilcdc_tfp410_fini(void) | |
418 | { | |
419 | platform_driver_unregister(&tfp410_driver); | |
420 | } |