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7#include <linux/gpio.h>
8#include <linux/mod_devicetable.h>
9#include <linux/of_gpio.h>
10#include <linux/pinctrl/consumer.h>
11#include <linux/platform_device.h>
12
13#include <drm/drm_atomic_helper.h>
14#include <drm/drm_encoder.h>
15#include <drm/drm_modeset_helper_vtables.h>
16#include <drm/drm_probe_helper.h>
17
18#include "tilcdc_drv.h"
19#include "tilcdc_tfp410.h"
20
21struct tfp410_module {
22 struct tilcdc_module base;
23 struct i2c_adapter *i2c;
24 int gpio;
25};
26#define to_tfp410_module(x) container_of(x, struct tfp410_module, base)
27
28
29static const struct tilcdc_panel_info dvi_info = {
30 .ac_bias = 255,
31 .ac_bias_intrpt = 0,
32 .dma_burst_sz = 16,
33 .bpp = 16,
34 .fdd = 0x80,
35 .tft_alt_mode = 0,
36 .sync_edge = 0,
37 .sync_ctrl = 1,
38 .raster_order = 0,
39};
40
41
42
43
44
45struct tfp410_encoder {
46 struct drm_encoder base;
47 struct tfp410_module *mod;
48 int dpms;
49};
50#define to_tfp410_encoder(x) container_of(x, struct tfp410_encoder, base)
51
52static void tfp410_encoder_dpms(struct drm_encoder *encoder, int mode)
53{
54 struct tfp410_encoder *tfp410_encoder = to_tfp410_encoder(encoder);
55
56 if (tfp410_encoder->dpms == mode)
57 return;
58
59 if (mode == DRM_MODE_DPMS_ON) {
60 DBG("Power on");
61 gpio_direction_output(tfp410_encoder->mod->gpio, 1);
62 } else {
63 DBG("Power off");
64 gpio_direction_output(tfp410_encoder->mod->gpio, 0);
65 }
66
67 tfp410_encoder->dpms = mode;
68}
69
70static void tfp410_encoder_prepare(struct drm_encoder *encoder)
71{
72 tfp410_encoder_dpms(encoder, DRM_MODE_DPMS_OFF);
73}
74
75static void tfp410_encoder_commit(struct drm_encoder *encoder)
76{
77 tfp410_encoder_dpms(encoder, DRM_MODE_DPMS_ON);
78}
79
80static void tfp410_encoder_mode_set(struct drm_encoder *encoder,
81 struct drm_display_mode *mode,
82 struct drm_display_mode *adjusted_mode)
83{
84
85}
86
87static const struct drm_encoder_funcs tfp410_encoder_funcs = {
88 .destroy = drm_encoder_cleanup,
89};
90
91static const struct drm_encoder_helper_funcs tfp410_encoder_helper_funcs = {
92 .dpms = tfp410_encoder_dpms,
93 .prepare = tfp410_encoder_prepare,
94 .commit = tfp410_encoder_commit,
95 .mode_set = tfp410_encoder_mode_set,
96};
97
98static struct drm_encoder *tfp410_encoder_create(struct drm_device *dev,
99 struct tfp410_module *mod)
100{
101 struct tfp410_encoder *tfp410_encoder;
102 struct drm_encoder *encoder;
103 int ret;
104
105 tfp410_encoder = devm_kzalloc(dev->dev, sizeof(*tfp410_encoder),
106 GFP_KERNEL);
107 if (!tfp410_encoder)
108 return NULL;
109
110 tfp410_encoder->dpms = DRM_MODE_DPMS_OFF;
111 tfp410_encoder->mod = mod;
112
113 encoder = &tfp410_encoder->base;
114 encoder->possible_crtcs = 1;
115
116 ret = drm_encoder_init(dev, encoder, &tfp410_encoder_funcs,
117 DRM_MODE_ENCODER_TMDS, NULL);
118 if (ret < 0)
119 goto fail;
120
121 drm_encoder_helper_add(encoder, &tfp410_encoder_helper_funcs);
122
123 return encoder;
124
125fail:
126 drm_encoder_cleanup(encoder);
127 return NULL;
128}
129
130
131
132
133
134struct tfp410_connector {
135 struct drm_connector base;
136
137 struct drm_encoder *encoder;
138 struct tfp410_module *mod;
139};
140#define to_tfp410_connector(x) container_of(x, struct tfp410_connector, base)
141
142
143static void tfp410_connector_destroy(struct drm_connector *connector)
144{
145 drm_connector_unregister(connector);
146 drm_connector_cleanup(connector);
147}
148
149static enum drm_connector_status tfp410_connector_detect(
150 struct drm_connector *connector,
151 bool force)
152{
153 struct tfp410_connector *tfp410_connector = to_tfp410_connector(connector);
154
155 if (drm_probe_ddc(tfp410_connector->mod->i2c))
156 return connector_status_connected;
157
158 return connector_status_unknown;
159}
160
161static int tfp410_connector_get_modes(struct drm_connector *connector)
162{
163 struct tfp410_connector *tfp410_connector = to_tfp410_connector(connector);
164 struct edid *edid;
165 int ret = 0;
166
167 edid = drm_get_edid(connector, tfp410_connector->mod->i2c);
168
169 drm_connector_update_edid_property(connector, edid);
170
171 if (edid) {
172 ret = drm_add_edid_modes(connector, edid);
173 kfree(edid);
174 }
175
176 return ret;
177}
178
179static struct drm_encoder *tfp410_connector_best_encoder(
180 struct drm_connector *connector)
181{
182 struct tfp410_connector *tfp410_connector = to_tfp410_connector(connector);
183 return tfp410_connector->encoder;
184}
185
186static const struct drm_connector_funcs tfp410_connector_funcs = {
187 .destroy = tfp410_connector_destroy,
188 .detect = tfp410_connector_detect,
189 .fill_modes = drm_helper_probe_single_connector_modes,
190 .reset = drm_atomic_helper_connector_reset,
191 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
192 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
193};
194
195static const struct drm_connector_helper_funcs tfp410_connector_helper_funcs = {
196 .get_modes = tfp410_connector_get_modes,
197 .best_encoder = tfp410_connector_best_encoder,
198};
199
200static struct drm_connector *tfp410_connector_create(struct drm_device *dev,
201 struct tfp410_module *mod, struct drm_encoder *encoder)
202{
203 struct tfp410_connector *tfp410_connector;
204 struct drm_connector *connector;
205 int ret;
206
207 tfp410_connector = devm_kzalloc(dev->dev, sizeof(*tfp410_connector),
208 GFP_KERNEL);
209 if (!tfp410_connector)
210 return NULL;
211
212 tfp410_connector->encoder = encoder;
213 tfp410_connector->mod = mod;
214
215 connector = &tfp410_connector->base;
216
217 drm_connector_init(dev, connector, &tfp410_connector_funcs,
218 DRM_MODE_CONNECTOR_DVID);
219 drm_connector_helper_add(connector, &tfp410_connector_helper_funcs);
220
221 connector->polled = DRM_CONNECTOR_POLL_CONNECT |
222 DRM_CONNECTOR_POLL_DISCONNECT;
223
224 connector->interlace_allowed = 0;
225 connector->doublescan_allowed = 0;
226
227 ret = drm_connector_attach_encoder(connector, encoder);
228 if (ret)
229 goto fail;
230
231 return connector;
232
233fail:
234 tfp410_connector_destroy(connector);
235 return NULL;
236}
237
238
239
240
241
242static int tfp410_modeset_init(struct tilcdc_module *mod, struct drm_device *dev)
243{
244 struct tfp410_module *tfp410_mod = to_tfp410_module(mod);
245 struct tilcdc_drm_private *priv = dev->dev_private;
246 struct drm_encoder *encoder;
247 struct drm_connector *connector;
248
249 encoder = tfp410_encoder_create(dev, tfp410_mod);
250 if (!encoder)
251 return -ENOMEM;
252
253 connector = tfp410_connector_create(dev, tfp410_mod, encoder);
254 if (!connector)
255 return -ENOMEM;
256
257 priv->encoders[priv->num_encoders++] = encoder;
258 priv->connectors[priv->num_connectors++] = connector;
259
260 tilcdc_crtc_set_panel_info(priv->crtc, &dvi_info);
261 return 0;
262}
263
264static const struct tilcdc_module_ops tfp410_module_ops = {
265 .modeset_init = tfp410_modeset_init,
266};
267
268
269
270
271
272static int tfp410_probe(struct platform_device *pdev)
273{
274 struct device_node *node = pdev->dev.of_node;
275 struct device_node *i2c_node;
276 struct tfp410_module *tfp410_mod;
277 struct tilcdc_module *mod;
278 struct pinctrl *pinctrl;
279 uint32_t i2c_phandle;
280 int ret = -EINVAL;
281
282
283 if (!node) {
284 dev_err(&pdev->dev, "device-tree data is missing\n");
285 return -ENXIO;
286 }
287
288 tfp410_mod = devm_kzalloc(&pdev->dev, sizeof(*tfp410_mod), GFP_KERNEL);
289 if (!tfp410_mod)
290 return -ENOMEM;
291
292 mod = &tfp410_mod->base;
293 pdev->dev.platform_data = mod;
294
295 tilcdc_module_init(mod, "tfp410", &tfp410_module_ops);
296
297 pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
298 if (IS_ERR(pinctrl))
299 dev_warn(&pdev->dev, "pins are not configured\n");
300
301 if (of_property_read_u32(node, "i2c", &i2c_phandle)) {
302 dev_err(&pdev->dev, "could not get i2c bus phandle\n");
303 goto fail;
304 }
305
306 i2c_node = of_find_node_by_phandle(i2c_phandle);
307 if (!i2c_node) {
308 dev_err(&pdev->dev, "could not get i2c bus node\n");
309 goto fail;
310 }
311
312 tfp410_mod->i2c = of_find_i2c_adapter_by_node(i2c_node);
313 if (!tfp410_mod->i2c) {
314 dev_err(&pdev->dev, "could not get i2c\n");
315 of_node_put(i2c_node);
316 goto fail;
317 }
318
319 of_node_put(i2c_node);
320
321 tfp410_mod->gpio = of_get_named_gpio_flags(node, "powerdn-gpio",
322 0, NULL);
323 if (tfp410_mod->gpio < 0) {
324 dev_warn(&pdev->dev, "No power down GPIO\n");
325 } else {
326 ret = gpio_request(tfp410_mod->gpio, "DVI_PDn");
327 if (ret) {
328 dev_err(&pdev->dev, "could not get DVI_PDn gpio\n");
329 goto fail_adapter;
330 }
331 }
332
333 return 0;
334
335fail_adapter:
336 i2c_put_adapter(tfp410_mod->i2c);
337
338fail:
339 tilcdc_module_cleanup(mod);
340 return ret;
341}
342
343static int tfp410_remove(struct platform_device *pdev)
344{
345 struct tilcdc_module *mod = dev_get_platdata(&pdev->dev);
346 struct tfp410_module *tfp410_mod = to_tfp410_module(mod);
347
348 i2c_put_adapter(tfp410_mod->i2c);
349 gpio_free(tfp410_mod->gpio);
350
351 tilcdc_module_cleanup(mod);
352
353 return 0;
354}
355
356static const struct of_device_id tfp410_of_match[] = {
357 { .compatible = "ti,tilcdc,tfp410", },
358 { },
359};
360
361struct platform_driver tfp410_driver = {
362 .probe = tfp410_probe,
363 .remove = tfp410_remove,
364 .driver = {
365 .owner = THIS_MODULE,
366 .name = "tfp410",
367 .of_match_table = tfp410_of_match,
368 },
369};
370
371int __init tilcdc_tfp410_init(void)
372{
373 return platform_driver_register(&tfp410_driver);
374}
375
376void __exit tilcdc_tfp410_fini(void)
377{
378 platform_driver_unregister(&tfp410_driver);
379}
380
