summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/i2c/ch7006_drv.c
blob: d3f2e87850107130e20561b2951bdf86e8aa35fc (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
/*
 * Copyright (C) 2009 Francisco Jerez.
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial
 * portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */

#include <linux/module.h>

#include "ch7006_priv.h"

/* DRM encoder functions */

static void ch7006_encoder_set_config(struct drm_encoder *encoder,
				      void *params)
{
	struct ch7006_priv *priv = to_ch7006_priv(encoder);

	priv->params = *(struct ch7006_encoder_params *)params;
}

static void ch7006_encoder_destroy(struct drm_encoder *encoder)
{
	struct ch7006_priv *priv = to_ch7006_priv(encoder);

	drm_property_destroy(encoder->dev, priv->scale_property);

	kfree(priv);
	to_encoder_slave(encoder)->slave_priv = NULL;

	drm_i2c_encoder_destroy(encoder);
}

static void  ch7006_encoder_dpms(struct drm_encoder *encoder, int mode)
{
	struct i2c_client *client = drm_i2c_encoder_get_client(encoder);
	struct ch7006_priv *priv = to_ch7006_priv(encoder);
	struct ch7006_state *state = &priv->state;

	ch7006_dbg(client, "\n");

	if (mode == priv->last_dpms)
		return;
	priv->last_dpms = mode;

	ch7006_setup_power_state(encoder);

	ch7006_load_reg(client, state, CH7006_POWER);
}

static void ch7006_encoder_save(struct drm_encoder *encoder)
{
	struct i2c_client *client = drm_i2c_encoder_get_client(encoder);
	struct ch7006_priv *priv = to_ch7006_priv(encoder);

	ch7006_dbg(client, "\n");

	ch7006_state_save(client, &priv->saved_state);
}

static void ch7006_encoder_restore(struct drm_encoder *encoder)
{
	struct i2c_client *client = drm_i2c_encoder_get_client(encoder);
	struct ch7006_priv *priv = to_ch7006_priv(encoder);

	ch7006_dbg(client, "\n");

	ch7006_state_load(client, &priv->saved_state);
}

static bool ch7006_encoder_mode_fixup(struct drm_encoder *encoder,
				      struct drm_display_mode *mode,
				      struct drm_display_mode *adjusted_mode)
{
	struct ch7006_priv *priv = to_ch7006_priv(encoder);

	/* The ch7006 is painfully picky with the input timings so no
	 * custom modes for now... */

	priv->mode = ch7006_lookup_mode(encoder, mode);

	return !!priv->mode;
}

static int ch7006_encoder_mode_valid(struct drm_encoder *encoder,
				     struct drm_display_mode *mode)
{
	if (ch7006_lookup_mode(encoder, mode))
		return MODE_OK;
	else
		return MODE_BAD;
}

static void ch7006_encoder_mode_set(struct drm_encoder *encoder,
				     struct drm_display_mode *drm_mode,
				     struct drm_display_mode *adjusted_mode)
{
	struct i2c_client *client = drm_i2c_encoder_get_client(encoder);
	struct ch7006_priv *priv = to_ch7006_priv(encoder);
	struct ch7006_encoder_params *params = &priv->params;
	struct ch7006_state *state = &priv->state;
	uint8_t *regs = state->regs;
	struct ch7006_mode *mode = priv->mode;
	struct ch7006_tv_norm_info *norm = &ch7006_tv_norms[priv->norm];
	int start_active;

	ch7006_dbg(client, "\n");

	regs[CH7006_DISPMODE] = norm->dispmode | mode->dispmode;
	regs[CH7006_BWIDTH] = 0;
	regs[CH7006_INPUT_FORMAT] = bitf(CH7006_INPUT_FORMAT_FORMAT,
					 params->input_format);

	regs[CH7006_CLKMODE] = CH7006_CLKMODE_SUBC_LOCK
		| bitf(CH7006_CLKMODE_XCM, params->xcm)
		| bitf(CH7006_CLKMODE_PCM, params->pcm);
	if (params->clock_mode)
		regs[CH7006_CLKMODE] |= CH7006_CLKMODE_MASTER;
	if (params->clock_edge)
		regs[CH7006_CLKMODE] |= CH7006_CLKMODE_POS_EDGE;

	start_active = (drm_mode->htotal & ~0x7) - (drm_mode->hsync_start & ~0x7);
	regs[CH7006_POV] = bitf(CH7006_POV_START_ACTIVE_8, start_active);
	regs[CH7006_START_ACTIVE] = bitf(CH7006_START_ACTIVE_0, start_active);

	regs[CH7006_INPUT_SYNC] = 0;
	if (params->sync_direction)
		regs[CH7006_INPUT_SYNC] |= CH7006_INPUT_SYNC_OUTPUT;
	if (params->sync_encoding)
		regs[CH7006_INPUT_SYNC] |= CH7006_INPUT_SYNC_EMBEDDED;
	if (drm_mode->flags & DRM_MODE_FLAG_PVSYNC)
		regs[CH7006_INPUT_SYNC] |= CH7006_INPUT_SYNC_PVSYNC;
	if (drm_mode->flags & DRM_MODE_FLAG_PHSYNC)
		regs[CH7006_INPUT_SYNC] |= CH7006_INPUT_SYNC_PHSYNC;

	regs[CH7006_DETECT] = 0;
	regs[CH7006_BCLKOUT] = 0;

	regs[CH7006_SUBC_INC3] = 0;
	if (params->pout_level)
		regs[CH7006_SUBC_INC3] |= CH7006_SUBC_INC3_POUT_3_3V;

	regs[CH7006_SUBC_INC4] = 0;
	if (params->active_detect)
		regs[CH7006_SUBC_INC4] |= CH7006_SUBC_INC4_DS_INPUT;

	regs[CH7006_PLL_CONTROL] = priv->saved_state.regs[CH7006_PLL_CONTROL];

	ch7006_setup_levels(encoder);
	ch7006_setup_subcarrier(encoder);
	ch7006_setup_pll(encoder);
	ch7006_setup_power_state(encoder);
	ch7006_setup_properties(encoder);

	ch7006_state_load(client, state);
}

static enum drm_connector_status ch7006_encoder_detect(struct drm_encoder *encoder,
						       struct drm_connector *connector)
{
	struct i2c_client *client = drm_i2c_encoder_get_client(encoder);
	struct ch7006_priv *priv = to_ch7006_priv(encoder);
	struct ch7006_state *state = &priv->state;
	int det;

	ch7006_dbg(client, "\n");

	ch7006_save_reg(client, state, CH7006_DETECT);
	ch7006_save_reg(client, state, CH7006_POWER);
	ch7006_save_reg(client, state, CH7006_CLKMODE);

	ch7006_write(client, CH7006_POWER, CH7006_POWER_RESET |
					   bitfs(CH7006_POWER_LEVEL, NORMAL));
	ch7006_write(client, CH7006_CLKMODE, CH7006_CLKMODE_MASTER);

	ch7006_write(client, CH7006_DETECT, CH7006_DETECT_SENSE);

	ch7006_write(client, CH7006_DETECT, 0);

	det = ch7006_read(client, CH7006_DETECT);

	ch7006_load_reg(client, state, CH7006_CLKMODE);
	ch7006_load_reg(client, state, CH7006_POWER);
	ch7006_load_reg(client, state, CH7006_DETECT);

	if ((det & (CH7006_DETECT_SVIDEO_Y_TEST|
		    CH7006_DETECT_SVIDEO_C_TEST|
		    CH7006_DETECT_CVBS_TEST)) == 0)
		priv->subconnector = DRM_MODE_SUBCONNECTOR_SCART;
	else if ((det & (CH7006_DETECT_SVIDEO_Y_TEST|
			 CH7006_DETECT_SVIDEO_C_TEST)) == 0)
		priv->subconnector = DRM_MODE_SUBCONNECTOR_SVIDEO;
	else if ((det & CH7006_DETECT_CVBS_TEST) == 0)
		priv->subconnector = DRM_MODE_SUBCONNECTOR_Composite;
	else
		priv->subconnector = DRM_MODE_SUBCONNECTOR_Unknown;

	drm_connector_property_set_value(connector,
			encoder->dev->mode_config.tv_subconnector_property,
							priv->subconnector);

	return priv->subconnector ? connector_status_connected :
					connector_status_disconnected;
}

static int ch7006_encoder_get_modes(struct drm_encoder *encoder,
				    struct drm_connector *connector)
{
	struct ch7006_priv *priv = to_ch7006_priv(encoder);
	struct ch7006_mode *mode;
	int n = 0;

	for (mode = ch7006_modes; mode->mode.clock; mode++) {
		if (~mode->valid_scales & 1<<priv->scale ||
		    ~mode->valid_norms & 1<<priv->norm)
			continue;

		drm_mode_probed_add(connector,
				drm_mode_duplicate(encoder->dev, &mode->mode));

		n++;
	}

	return n;
}

static int ch7006_encoder_create_resources(struct drm_encoder *encoder,
					   struct drm_connector *connector)
{
	struct ch7006_priv *priv = to_ch7006_priv(encoder);
	struct drm_device *dev = encoder->dev;
	struct drm_mode_config *conf = &dev->mode_config;

	drm_mode_create_tv_properties(dev, NUM_TV_NORMS, ch7006_tv_norm_names);

	priv->scale_property = drm_property_create_range(dev, 0, "scale", 0, 2);

	drm_connector_attach_property(connector, conf->tv_select_subconnector_property,
				      priv->select_subconnector);
	drm_connector_attach_property(connector, conf->tv_subconnector_property,
				      priv->subconnector);
	drm_connector_attach_property(connector, conf->tv_left_margin_property,
				      priv->hmargin);
	drm_connector_attach_property(connector, conf->tv_bottom_margin_property,
				      priv->vmargin);
	drm_connector_attach_property(connector, conf->tv_mode_property,
				      priv->norm);
	drm_connector_attach_property(connector, conf->tv_brightness_property,
				      priv->brightness);
	drm_connector_attach_property(connector, conf->tv_contrast_property,
				      priv->contrast);
	drm_connector_attach_property(connector, conf->tv_flicker_reduction_property,
				      priv->flicker);
	drm_connector_attach_property(connector, priv->scale_property,
				      priv->scale);

	return 0;
}

static int ch7006_encoder_set_property(struct drm_encoder *encoder,
				       struct drm_connector *connector,
				       struct drm_property *property,
				       uint64_t val)
{
	struct i2c_client *client = drm_i2c_encoder_get_client(encoder);
	struct ch7006_priv *priv = to_ch7006_priv(encoder);
	struct ch7006_state *state = &priv->state;
	struct drm_mode_config *conf = &encoder->dev->mode_config;
	struct drm_crtc *crtc = encoder->crtc;
	bool modes_changed = false;

	ch7006_dbg(client, "\n");

	if (property == conf->tv_select_subconnector_property) {
		priv->select_subconnector = val;

		ch7006_setup_power_state(encoder);

		ch7006_load_reg(client, state, CH7006_POWER);

	} else if (property == conf->tv_left_margin_property) {
		priv->hmargin = val;

		ch7006_setup_properties(encoder);

		ch7006_load_reg(client, state, CH7006_POV);
		ch7006_load_reg(client, state, CH7006_HPOS);

	} else if (property == conf->tv_bottom_margin_property) {
		priv->vmargin = val;

		ch7006_setup_properties(encoder);

		ch7006_load_reg(client, state, CH7006_POV);
		ch7006_load_reg(client, state, CH7006_VPOS);

	} else if (property == conf->tv_mode_property) {
		if (connector->dpms != DRM_MODE_DPMS_OFF)
			return -EINVAL;

		priv->norm = val;

		modes_changed = true;

	} else if (property == conf->tv_brightness_property) {
		priv->brightness = val;

		ch7006_setup_levels(encoder);

		ch7006_load_reg(client, state, CH7006_BLACK_LEVEL);

	} else if (property == conf->tv_contrast_property) {
		priv->contrast = val;

		ch7006_setup_properties(encoder);

		ch7006_load_reg(client, state, CH7006_CONTRAST);

	} else if (property == conf->tv_flicker_reduction_property) {
		priv->flicker = val;

		ch7006_setup_properties(encoder);

		ch7006_load_reg(client, state, CH7006_FFILTER);

	} else if (property == priv->scale_property) {
		if (connector->dpms != DRM_MODE_DPMS_OFF)
			return -EINVAL;

		priv->scale = val;

		modes_changed = true;

	} else {
		return -EINVAL;
	}

	if (modes_changed) {
		drm_helper_probe_single_connector_modes(connector, 0, 0);

		/* Disable the crtc to ensure a full modeset is
		 * performed whenever it's turned on again. */
		if (crtc) {
			struct drm_mode_set modeset = {
				.crtc = crtc,
			};

			crtc->funcs->set_config(&modeset);
		}
	}

	return 0;
}

static struct drm_encoder_slave_funcs ch7006_encoder_funcs = {
	.set_config = ch7006_encoder_set_config,
	.destroy = ch7006_encoder_destroy,
	.dpms = ch7006_encoder_dpms,
	.save = ch7006_encoder_save,
	.restore = ch7006_encoder_restore,
	.mode_fixup = ch7006_encoder_mode_fixup,
	.mode_valid = ch7006_encoder_mode_valid,
	.mode_set = ch7006_encoder_mode_set,
	.detect = ch7006_encoder_detect,
	.get_modes = ch7006_encoder_get_modes,
	.create_resources = ch7006_encoder_create_resources,
	.set_property = ch7006_encoder_set_property,
};


/* I2C driver functions */

static int ch7006_probe(struct i2c_client *client, const struct i2c_device_id *id)
{
	uint8_t addr = CH7006_VERSION_ID;
	uint8_t val;
	int ret;

	ch7006_dbg(client, "\n");

	ret = i2c_master_send(client, &addr, sizeof(addr));
	if (ret < 0)
		goto fail;

	ret = i2c_master_recv(client, &val, sizeof(val));
	if (ret < 0)
		goto fail;

	ch7006_info(client, "Detected version ID: %x\n", val);

	/* I don't know what this is for, but otherwise I get no
	 * signal.
	 */
	ch7006_write(client, 0x3d, 0x0);

	return 0;

fail:
	ch7006_err(client, "Error %d reading version ID\n", ret);

	return -ENODEV;
}

static int ch7006_remove(struct i2c_client *client)
{
	ch7006_dbg(client, "\n");

	return 0;
}

static int ch7006_suspend(struct i2c_client *client, pm_message_t mesg)
{
	ch7006_dbg(client, "\n");

	return 0;
}

static int ch7006_resume(struct i2c_client *client)
{
	ch7006_dbg(client, "\n");

	ch7006_write(client, 0x3d, 0x0);

	return 0;
}

static int ch7006_encoder_init(struct i2c_client *client,
			       struct drm_device *dev,
			       struct drm_encoder_slave *encoder)
{
	struct ch7006_priv *priv;
	int i;

	ch7006_dbg(client, "\n");

	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	encoder->slave_priv = priv;
	encoder->slave_funcs = &ch7006_encoder_funcs;

	priv->norm = TV_NORM_PAL;
	priv->select_subconnector = DRM_MODE_SUBCONNECTOR_Automatic;
	priv->subconnector = DRM_MODE_SUBCONNECTOR_Unknown;
	priv->scale = 1;
	priv->contrast = 50;
	priv->brightness = 50;
	priv->flicker = 50;
	priv->hmargin = 50;
	priv->vmargin = 50;
	priv->last_dpms = -1;
	priv->chip_version = ch7006_read(client, CH7006_VERSION_ID);

	if (ch7006_tv_norm) {
		for (i = 0; i < NUM_TV_NORMS; i++) {
			if (!strcmp(ch7006_tv_norm_names[i], ch7006_tv_norm)) {
				priv->norm = i;
				break;
			}
		}

		if (i == NUM_TV_NORMS)
			ch7006_err(client, "Invalid TV norm setting \"%s\".\n",
				   ch7006_tv_norm);
	}

	if (ch7006_scale >= 0 && ch7006_scale <= 2)
		priv->scale = ch7006_scale;
	else
		ch7006_err(client, "Invalid scale setting \"%d\".\n",
			   ch7006_scale);

	return 0;
}

static struct i2c_device_id ch7006_ids[] = {
	{ "ch7006", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, ch7006_ids);

static struct drm_i2c_encoder_driver ch7006_driver = {
	.i2c_driver = {
		.probe = ch7006_probe,
		.remove = ch7006_remove,
		.suspend = ch7006_suspend,
		.resume = ch7006_resume,

		.driver = {
			.name = "ch7006",
		},

		.id_table = ch7006_ids,
	},

	.encoder_init = ch7006_encoder_init,
};


/* Module initialization */

static int __init ch7006_init(void)
{
	return drm_i2c_encoder_register(THIS_MODULE, &ch7006_driver);
}

static void __exit ch7006_exit(void)
{
	drm_i2c_encoder_unregister(&ch7006_driver);
}

int ch7006_debug;
module_param_named(debug, ch7006_debug, int, 0600);
MODULE_PARM_DESC(debug, "Enable debug output.");

char *ch7006_tv_norm;
module_param_named(tv_norm, ch7006_tv_norm, charp, 0600);
MODULE_PARM_DESC(tv_norm, "Default TV norm.\n"
		 "\t\tSupported: PAL, PAL-M, PAL-N, PAL-Nc, PAL-60, NTSC-M, NTSC-J.\n"
		 "\t\tDefault: PAL");

int ch7006_scale = 1;
module_param_named(scale, ch7006_scale, int, 0600);
MODULE_PARM_DESC(scale, "Default scale.\n"
		 "\t\tSupported: 0 -> Select video modes with a higher blanking ratio.\n"
		 "\t\t\t1 -> Select default video modes.\n"
		 "\t\t\t2 -> Select video modes with a lower blanking ratio.");

MODULE_AUTHOR("Francisco Jerez <currojerez@riseup.net>");
MODULE_DESCRIPTION("Chrontel ch7006 TV encoder driver");
MODULE_LICENSE("GPL and additional rights");

module_init(ch7006_init);
module_exit(ch7006_exit);