blob: 741c7b5b8302d6b058a927c8ca2a1b683cbfe53c [file] [log] [blame]
Rob Clark16ea9752013-01-08 15:04:28 -06001/*
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>
Rob Clark16ea9752013-01-08 15:04:28 -060019#include <linux/gpio.h>
20#include <linux/of_gpio.h>
21#include <linux/pinctrl/pinmux.h>
22#include <linux/pinctrl/consumer.h>
Jyri Sarha018cfbd2016-04-13 19:00:51 +030023#include <drm/drm_atomic_helper.h>
Rob Clark16ea9752013-01-08 15:04:28 -060024
25#include "tilcdc_drv.h"
26
27struct tfp410_module {
28 struct tilcdc_module base;
29 struct i2c_adapter *i2c;
30 int gpio;
31};
32#define to_tfp410_module(x) container_of(x, struct tfp410_module, base)
33
34
35static const struct tilcdc_panel_info dvi_info = {
36 .ac_bias = 255,
37 .ac_bias_intrpt = 0,
38 .dma_burst_sz = 16,
39 .bpp = 16,
40 .fdd = 0x80,
41 .tft_alt_mode = 0,
42 .sync_edge = 0,
43 .sync_ctrl = 1,
44 .raster_order = 0,
45};
46
47/*
48 * Encoder:
49 */
50
51struct tfp410_encoder {
52 struct drm_encoder base;
53 struct tfp410_module *mod;
54 int dpms;
55};
56#define to_tfp410_encoder(x) container_of(x, struct tfp410_encoder, base)
57
Rob Clark16ea9752013-01-08 15:04:28 -060058static void tfp410_encoder_dpms(struct drm_encoder *encoder, int mode)
59{
60 struct tfp410_encoder *tfp410_encoder = to_tfp410_encoder(encoder);
61
62 if (tfp410_encoder->dpms == mode)
63 return;
64
65 if (mode == DRM_MODE_DPMS_ON) {
66 DBG("Power on");
67 gpio_direction_output(tfp410_encoder->mod->gpio, 1);
68 } else {
69 DBG("Power off");
70 gpio_direction_output(tfp410_encoder->mod->gpio, 0);
71 }
72
73 tfp410_encoder->dpms = mode;
74}
75
Rob Clark16ea9752013-01-08 15:04:28 -060076static void tfp410_encoder_prepare(struct drm_encoder *encoder)
77{
78 tfp410_encoder_dpms(encoder, DRM_MODE_DPMS_OFF);
Rob Clark16ea9752013-01-08 15:04:28 -060079}
80
81static void tfp410_encoder_commit(struct drm_encoder *encoder)
82{
83 tfp410_encoder_dpms(encoder, DRM_MODE_DPMS_ON);
84}
85
86static 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
93static const struct drm_encoder_funcs tfp410_encoder_funcs = {
Jyri Sarhad0ec32c2016-02-23 12:44:27 +020094 .destroy = drm_encoder_cleanup,
Rob Clark16ea9752013-01-08 15:04:28 -060095};
96
97static const struct drm_encoder_helper_funcs tfp410_encoder_helper_funcs = {
98 .dpms = tfp410_encoder_dpms,
Rob Clark16ea9752013-01-08 15:04:28 -060099 .prepare = tfp410_encoder_prepare,
100 .commit = tfp410_encoder_commit,
101 .mode_set = tfp410_encoder_mode_set,
102};
103
104static 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
Jyri Sarhad0ec32c2016-02-23 12:44:27 +0200111 tfp410_encoder = devm_kzalloc(dev->dev, sizeof(*tfp410_encoder),
112 GFP_KERNEL);
Rob Clark16ea9752013-01-08 15:04:28 -0600113 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,
Ville Syrjälä13a3d912015-12-09 16:20:18 +0200125 DRM_MODE_ENCODER_TMDS, NULL);
Rob Clark16ea9752013-01-08 15:04:28 -0600126 if (ret < 0)
127 goto fail;
128
129 drm_encoder_helper_add(encoder, &tfp410_encoder_helper_funcs);
130
131 return encoder;
132
133fail:
Jyri Sarhad0ec32c2016-02-23 12:44:27 +0200134 drm_encoder_cleanup(encoder);
Rob Clark16ea9752013-01-08 15:04:28 -0600135 return NULL;
136}
137
138/*
139 * Connector:
140 */
141
142struct 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
151static void tfp410_connector_destroy(struct drm_connector *connector)
152{
Sachin Kamat62eb3e22014-07-09 17:12:57 +0530153 drm_connector_unregister(connector);
Rob Clark16ea9752013-01-08 15:04:28 -0600154 drm_connector_cleanup(connector);
Rob Clark16ea9752013-01-08 15:04:28 -0600155}
156
157static 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
169static 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
187static 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
195static 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
202static const struct drm_connector_funcs tfp410_connector_funcs = {
203 .destroy = tfp410_connector_destroy,
Jyri Sarha018cfbd2016-04-13 19:00:51 +0300204 .dpms = drm_atomic_helper_connector_dpms,
Rob Clark16ea9752013-01-08 15:04:28 -0600205 .detect = tfp410_connector_detect,
206 .fill_modes = drm_helper_probe_single_connector_modes,
Jyri Sarha018cfbd2016-04-13 19:00:51 +0300207 .reset = drm_atomic_helper_connector_reset,
208 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
209 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
Rob Clark16ea9752013-01-08 15:04:28 -0600210};
211
212static const struct drm_connector_helper_funcs tfp410_connector_helper_funcs = {
213 .get_modes = tfp410_connector_get_modes,
214 .mode_valid = tfp410_connector_mode_valid,
215 .best_encoder = tfp410_connector_best_encoder,
216};
217
218static struct drm_connector *tfp410_connector_create(struct drm_device *dev,
219 struct tfp410_module *mod, struct drm_encoder *encoder)
220{
221 struct tfp410_connector *tfp410_connector;
222 struct drm_connector *connector;
223 int ret;
224
Jyri Sarhad0ec32c2016-02-23 12:44:27 +0200225 tfp410_connector = devm_kzalloc(dev->dev, sizeof(*tfp410_connector),
226 GFP_KERNEL);
Rob Clark16ea9752013-01-08 15:04:28 -0600227 if (!tfp410_connector) {
228 dev_err(dev->dev, "allocation failed\n");
229 return NULL;
230 }
231
232 tfp410_connector->encoder = encoder;
233 tfp410_connector->mod = mod;
234
235 connector = &tfp410_connector->base;
236
237 drm_connector_init(dev, connector, &tfp410_connector_funcs,
238 DRM_MODE_CONNECTOR_DVID);
239 drm_connector_helper_add(connector, &tfp410_connector_helper_funcs);
240
241 connector->polled = DRM_CONNECTOR_POLL_CONNECT |
242 DRM_CONNECTOR_POLL_DISCONNECT;
243
244 connector->interlace_allowed = 0;
245 connector->doublescan_allowed = 0;
246
247 ret = drm_mode_connector_attach_encoder(connector, encoder);
248 if (ret)
249 goto fail;
250
Thomas Wood34ea3d32014-05-29 16:57:41 +0100251 drm_connector_register(connector);
Rob Clark16ea9752013-01-08 15:04:28 -0600252
253 return connector;
254
255fail:
256 tfp410_connector_destroy(connector);
257 return NULL;
258}
259
260/*
261 * Module:
262 */
263
264static int tfp410_modeset_init(struct tilcdc_module *mod, struct drm_device *dev)
265{
266 struct tfp410_module *tfp410_mod = to_tfp410_module(mod);
267 struct tilcdc_drm_private *priv = dev->dev_private;
268 struct drm_encoder *encoder;
269 struct drm_connector *connector;
270
271 encoder = tfp410_encoder_create(dev, tfp410_mod);
272 if (!encoder)
273 return -ENOMEM;
274
275 connector = tfp410_connector_create(dev, tfp410_mod, encoder);
276 if (!connector)
277 return -ENOMEM;
278
279 priv->encoders[priv->num_encoders++] = encoder;
280 priv->connectors[priv->num_connectors++] = connector;
281
Jyri Sarha7c979b52016-04-13 18:59:16 +0300282 tilcdc_crtc_set_panel_info(priv->crtc, &dvi_info);
Rob Clark16ea9752013-01-08 15:04:28 -0600283 return 0;
284}
285
Rob Clark16ea9752013-01-08 15:04:28 -0600286static const struct tilcdc_module_ops tfp410_module_ops = {
287 .modeset_init = tfp410_modeset_init,
Rob Clark16ea9752013-01-08 15:04:28 -0600288};
289
290/*
291 * Device:
292 */
293
294static struct of_device_id tfp410_of_match[];
295
296static int tfp410_probe(struct platform_device *pdev)
297{
298 struct device_node *node = pdev->dev.of_node;
299 struct device_node *i2c_node;
300 struct tfp410_module *tfp410_mod;
301 struct tilcdc_module *mod;
302 struct pinctrl *pinctrl;
303 uint32_t i2c_phandle;
304 int ret = -EINVAL;
305
306 /* bail out early if no DT data: */
307 if (!node) {
308 dev_err(&pdev->dev, "device-tree data is missing\n");
309 return -ENXIO;
310 }
311
Jyri Sarhad0ec32c2016-02-23 12:44:27 +0200312 tfp410_mod = devm_kzalloc(&pdev->dev, sizeof(*tfp410_mod), GFP_KERNEL);
Rob Clark16ea9752013-01-08 15:04:28 -0600313 if (!tfp410_mod)
314 return -ENOMEM;
315
316 mod = &tfp410_mod->base;
Guido Martínez7cdcce92014-06-17 11:17:10 -0300317 pdev->dev.platform_data = mod;
Rob Clark16ea9752013-01-08 15:04:28 -0600318
319 tilcdc_module_init(mod, "tfp410", &tfp410_module_ops);
320
321 pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
322 if (IS_ERR(pinctrl))
323 dev_warn(&pdev->dev, "pins are not configured\n");
324
325 if (of_property_read_u32(node, "i2c", &i2c_phandle)) {
326 dev_err(&pdev->dev, "could not get i2c bus phandle\n");
327 goto fail;
328 }
329
Benoit Parrotdc28aa02013-06-18 17:18:31 -0500330 mod->preferred_bpp = dvi_info.bpp;
331
Rob Clark16ea9752013-01-08 15:04:28 -0600332 i2c_node = of_find_node_by_phandle(i2c_phandle);
333 if (!i2c_node) {
334 dev_err(&pdev->dev, "could not get i2c bus node\n");
335 goto fail;
336 }
337
338 tfp410_mod->i2c = of_find_i2c_adapter_by_node(i2c_node);
339 if (!tfp410_mod->i2c) {
340 dev_err(&pdev->dev, "could not get i2c\n");
Guido Martínez7cdcce92014-06-17 11:17:10 -0300341 of_node_put(i2c_node);
Rob Clark16ea9752013-01-08 15:04:28 -0600342 goto fail;
343 }
344
345 of_node_put(i2c_node);
346
347 tfp410_mod->gpio = of_get_named_gpio_flags(node, "powerdn-gpio",
348 0, NULL);
Arnd Bergmann287980e2016-05-27 23:23:25 +0200349 if (tfp410_mod->gpio < 0) {
Rob Clark16ea9752013-01-08 15:04:28 -0600350 dev_warn(&pdev->dev, "No power down GPIO\n");
351 } else {
352 ret = gpio_request(tfp410_mod->gpio, "DVI_PDn");
353 if (ret) {
354 dev_err(&pdev->dev, "could not get DVI_PDn gpio\n");
Guido Martínez7cdcce92014-06-17 11:17:10 -0300355 goto fail_adapter;
Rob Clark16ea9752013-01-08 15:04:28 -0600356 }
357 }
358
359 return 0;
360
Guido Martínez7cdcce92014-06-17 11:17:10 -0300361fail_adapter:
362 i2c_put_adapter(tfp410_mod->i2c);
363
Rob Clark16ea9752013-01-08 15:04:28 -0600364fail:
Guido Martínez7cdcce92014-06-17 11:17:10 -0300365 tilcdc_module_cleanup(mod);
Rob Clark16ea9752013-01-08 15:04:28 -0600366 return ret;
367}
368
369static int tfp410_remove(struct platform_device *pdev)
370{
Guido Martínez7cdcce92014-06-17 11:17:10 -0300371 struct tilcdc_module *mod = dev_get_platdata(&pdev->dev);
372 struct tfp410_module *tfp410_mod = to_tfp410_module(mod);
373
374 i2c_put_adapter(tfp410_mod->i2c);
375 gpio_free(tfp410_mod->gpio);
376
377 tilcdc_module_cleanup(mod);
Guido Martínez7cdcce92014-06-17 11:17:10 -0300378
Rob Clark16ea9752013-01-08 15:04:28 -0600379 return 0;
380}
381
382static struct of_device_id tfp410_of_match[] = {
383 { .compatible = "ti,tilcdc,tfp410", },
384 { },
385};
Rob Clark16ea9752013-01-08 15:04:28 -0600386
387struct platform_driver tfp410_driver = {
388 .probe = tfp410_probe,
389 .remove = tfp410_remove,
390 .driver = {
391 .owner = THIS_MODULE,
392 .name = "tfp410",
393 .of_match_table = tfp410_of_match,
394 },
395};
396
397int __init tilcdc_tfp410_init(void)
398{
399 return platform_driver_register(&tfp410_driver);
400}
401
402void __exit tilcdc_tfp410_fini(void)
403{
404 platform_driver_unregister(&tfp410_driver);
405}