summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/ipu-v3/ipu-dc.c
blob: 2326c752d89b2086cb51234ef9b55ccda6bec87b (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
/*
 * Copyright (c) 2010 Sascha Hauer <s.hauer@pengutronix.de>
 * Copyright (C) 2005-2009 Freescale Semiconductor, Inc.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * for more details.
 */

#include <linux/export.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/io.h>

#include <video/imx-ipu-v3.h>
#include "ipu-prv.h"

#define DC_MAP_CONF_PTR(n)	(0x108 + ((n) & ~0x1) * 2)
#define DC_MAP_CONF_VAL(n)	(0x144 + ((n) & ~0x1) * 2)

#define DC_EVT_NF		0
#define DC_EVT_NL		1
#define DC_EVT_EOF		2
#define DC_EVT_NFIELD		3
#define DC_EVT_EOL		4
#define DC_EVT_EOFIELD		5
#define DC_EVT_NEW_ADDR		6
#define DC_EVT_NEW_CHAN		7
#define DC_EVT_NEW_DATA		8

#define DC_EVT_NEW_ADDR_W_0	0
#define DC_EVT_NEW_ADDR_W_1	1
#define DC_EVT_NEW_CHAN_W_0	2
#define DC_EVT_NEW_CHAN_W_1	3
#define DC_EVT_NEW_DATA_W_0	4
#define DC_EVT_NEW_DATA_W_1	5
#define DC_EVT_NEW_ADDR_R_0	6
#define DC_EVT_NEW_ADDR_R_1	7
#define DC_EVT_NEW_CHAN_R_0	8
#define DC_EVT_NEW_CHAN_R_1	9
#define DC_EVT_NEW_DATA_R_0	10
#define DC_EVT_NEW_DATA_R_1	11

#define DC_WR_CH_CONF		0x0
#define DC_WR_CH_ADDR		0x4
#define DC_RL_CH(evt)		(8 + ((evt) & ~0x1) * 2)

#define DC_GEN			0xd4
#define DC_DISP_CONF1(disp)	(0xd8 + (disp) * 4)
#define DC_DISP_CONF2(disp)	(0xe8 + (disp) * 4)
#define DC_STAT			0x1c8

#define WROD(lf)		(0x18 | ((lf) << 1))
#define WRG			0x01
#define WCLK			0xc9

#define SYNC_WAVE 0
#define NULL_WAVE (-1)

#define DC_GEN_SYNC_1_6_SYNC	(2 << 1)
#define DC_GEN_SYNC_PRIORITY_1	(1 << 7)

#define DC_WR_CH_CONF_WORD_SIZE_8		(0 << 0)
#define DC_WR_CH_CONF_WORD_SIZE_16		(1 << 0)
#define DC_WR_CH_CONF_WORD_SIZE_24		(2 << 0)
#define DC_WR_CH_CONF_WORD_SIZE_32		(3 << 0)
#define DC_WR_CH_CONF_DISP_ID_PARALLEL(i)	(((i) & 0x1) << 3)
#define DC_WR_CH_CONF_DISP_ID_SERIAL		(2 << 3)
#define DC_WR_CH_CONF_DISP_ID_ASYNC		(3 << 4)
#define DC_WR_CH_CONF_FIELD_MODE		(1 << 9)
#define DC_WR_CH_CONF_PROG_TYPE_NORMAL		(4 << 5)
#define DC_WR_CH_CONF_PROG_TYPE_MASK		(7 << 5)
#define DC_WR_CH_CONF_PROG_DI_ID		(1 << 2)
#define DC_WR_CH_CONF_PROG_DISP_ID(i)		(((i) & 0x1) << 3)

#define IPU_DC_NUM_CHANNELS	10

struct ipu_dc_priv;

enum ipu_dc_map {
	IPU_DC_MAP_RGB24,
	IPU_DC_MAP_RGB565,
	IPU_DC_MAP_GBR24, /* TVEv2 */
	IPU_DC_MAP_BGR666,
	IPU_DC_MAP_LVDS666,
	IPU_DC_MAP_BGR24,
};

struct ipu_dc {
	/* The display interface number assigned to this dc channel */
	unsigned int		di;
	void __iomem		*base;
	struct ipu_dc_priv	*priv;
	int			chno;
	bool			in_use;
};

struct ipu_dc_priv {
	void __iomem		*dc_reg;
	void __iomem		*dc_tmpl_reg;
	struct ipu_soc		*ipu;
	struct device		*dev;
	struct ipu_dc		channels[IPU_DC_NUM_CHANNELS];
	struct mutex		mutex;
	struct completion	comp;
	int			dc_irq;
	int			dp_irq;
};

static void dc_link_event(struct ipu_dc *dc, int event, int addr, int priority)
{
	u32 reg;

	reg = readl(dc->base + DC_RL_CH(event));
	reg &= ~(0xffff << (16 * (event & 0x1)));
	reg |= ((addr << 8) | priority) << (16 * (event & 0x1));
	writel(reg, dc->base + DC_RL_CH(event));
}

static void dc_write_tmpl(struct ipu_dc *dc, int word, u32 opcode, u32 operand,
		int map, int wave, int glue, int sync, int stop)
{
	struct ipu_dc_priv *priv = dc->priv;
	u32 reg1, reg2;

	if (opcode == WCLK) {
		reg1 = (operand << 20) & 0xfff00000;
		reg2 = operand >> 12 | opcode << 1 | stop << 9;
	} else if (opcode == WRG) {
		reg1 = sync | glue << 4 | ++wave << 11 | ((operand << 15) & 0xffff8000);
		reg2 = operand >> 17 | opcode << 7 | stop << 9;
	} else {
		reg1 = sync | glue << 4 | ++wave << 11 | ++map << 15 | ((operand << 20) & 0xfff00000);
		reg2 = operand >> 12 | opcode << 4 | stop << 9;
	}
	writel(reg1, priv->dc_tmpl_reg + word * 8);
	writel(reg2, priv->dc_tmpl_reg + word * 8 + 4);
}

static int ipu_pixfmt_to_map(u32 fmt)
{
	switch (fmt) {
	case V4L2_PIX_FMT_RGB24:
		return IPU_DC_MAP_RGB24;
	case V4L2_PIX_FMT_RGB565:
		return IPU_DC_MAP_RGB565;
	case IPU_PIX_FMT_GBR24:
		return IPU_DC_MAP_GBR24;
	case V4L2_PIX_FMT_BGR666:
		return IPU_DC_MAP_BGR666;
	case v4l2_fourcc('L', 'V', 'D', '6'):
		return IPU_DC_MAP_LVDS666;
	case V4L2_PIX_FMT_BGR24:
		return IPU_DC_MAP_BGR24;
	default:
		return -EINVAL;
	}
}

int ipu_dc_init_sync(struct ipu_dc *dc, struct ipu_di *di, bool interlaced,
		u32 pixel_fmt, u32 width)
{
	struct ipu_dc_priv *priv = dc->priv;
	u32 reg = 0;
	int map;

	dc->di = ipu_di_get_num(di);

	map = ipu_pixfmt_to_map(pixel_fmt);
	if (map < 0) {
		dev_dbg(priv->dev, "IPU_DISP: No MAP\n");
		return map;
	}

	if (interlaced) {
		dc_link_event(dc, DC_EVT_NL, 0, 3);
		dc_link_event(dc, DC_EVT_EOL, 0, 2);
		dc_link_event(dc, DC_EVT_NEW_DATA, 0, 1);

		/* Init template microcode */
		dc_write_tmpl(dc, 0, WROD(0), 0, map, SYNC_WAVE, 0, 8, 1);
	} else {
		if (dc->di) {
			dc_link_event(dc, DC_EVT_NL, 2, 3);
			dc_link_event(dc, DC_EVT_EOL, 3, 2);
			dc_link_event(dc, DC_EVT_NEW_DATA, 1, 1);
			/* Init template microcode */
			dc_write_tmpl(dc, 2, WROD(0), 0, map, SYNC_WAVE, 8, 5, 1);
			dc_write_tmpl(dc, 3, WROD(0), 0, map, SYNC_WAVE, 4, 5, 0);
			dc_write_tmpl(dc, 4, WRG, 0, map, NULL_WAVE, 0, 0, 1);
			dc_write_tmpl(dc, 1, WROD(0), 0, map, SYNC_WAVE, 0, 5, 1);
		} else {
			dc_link_event(dc, DC_EVT_NL, 5, 3);
			dc_link_event(dc, DC_EVT_EOL, 6, 2);
			dc_link_event(dc, DC_EVT_NEW_DATA, 8, 1);
			/* Init template microcode */
			dc_write_tmpl(dc, 5, WROD(0), 0, map, SYNC_WAVE, 8, 5, 1);
			dc_write_tmpl(dc, 6, WROD(0), 0, map, SYNC_WAVE, 4, 5, 0);
			dc_write_tmpl(dc, 7, WRG, 0, map, NULL_WAVE, 0, 0, 1);
			dc_write_tmpl(dc, 8, WROD(0), 0, map, SYNC_WAVE, 0, 5, 1);
		}
	}
	dc_link_event(dc, DC_EVT_NF, 0, 0);
	dc_link_event(dc, DC_EVT_NFIELD, 0, 0);
	dc_link_event(dc, DC_EVT_EOF, 0, 0);
	dc_link_event(dc, DC_EVT_EOFIELD, 0, 0);
	dc_link_event(dc, DC_EVT_NEW_CHAN, 0, 0);
	dc_link_event(dc, DC_EVT_NEW_ADDR, 0, 0);

	reg = readl(dc->base + DC_WR_CH_CONF);
	if (interlaced)
		reg |= DC_WR_CH_CONF_FIELD_MODE;
	else
		reg &= ~DC_WR_CH_CONF_FIELD_MODE;
	writel(reg, dc->base + DC_WR_CH_CONF);

	writel(0x0, dc->base + DC_WR_CH_ADDR);
	writel(width, priv->dc_reg + DC_DISP_CONF2(dc->di));

	return 0;
}
EXPORT_SYMBOL_GPL(ipu_dc_init_sync);

void ipu_dc_enable(struct ipu_soc *ipu)
{
	ipu_module_enable(ipu, IPU_CONF_DC_EN);
}
EXPORT_SYMBOL_GPL(ipu_dc_enable);

void ipu_dc_enable_channel(struct ipu_dc *dc)
{
	int di;
	u32 reg;

	di = dc->di;

	reg = readl(dc->base + DC_WR_CH_CONF);
	reg |= DC_WR_CH_CONF_PROG_TYPE_NORMAL;
	writel(reg, dc->base + DC_WR_CH_CONF);
}
EXPORT_SYMBOL_GPL(ipu_dc_enable_channel);

static irqreturn_t dc_irq_handler(int irq, void *dev_id)
{
	struct ipu_dc *dc = dev_id;
	u32 reg;

	reg = readl(dc->base + DC_WR_CH_CONF);
	reg &= ~DC_WR_CH_CONF_PROG_TYPE_MASK;
	writel(reg, dc->base + DC_WR_CH_CONF);

	/* The Freescale BSP kernel clears DIx_COUNTER_RELEASE here */

	complete(&dc->priv->comp);
	return IRQ_HANDLED;
}

void ipu_dc_disable_channel(struct ipu_dc *dc)
{
	struct ipu_dc_priv *priv = dc->priv;
	int irq, ret;
	u32 val;

	/* TODO: Handle MEM_FG_SYNC differently from MEM_BG_SYNC */
	if (dc->chno == 1)
		irq = priv->dc_irq;
	else if (dc->chno == 5)
		irq = priv->dp_irq;
	else
		return;

	init_completion(&priv->comp);
	enable_irq(irq);
	ret = wait_for_completion_timeout(&priv->comp, msecs_to_jiffies(50));
	disable_irq(irq);
	if (ret <= 0) {
		dev_warn(priv->dev, "DC stop timeout after 50 ms\n");

		val = readl(dc->base + DC_WR_CH_CONF);
		val &= ~DC_WR_CH_CONF_PROG_TYPE_MASK;
		writel(val, dc->base + DC_WR_CH_CONF);
	}
}
EXPORT_SYMBOL_GPL(ipu_dc_disable_channel);

void ipu_dc_disable(struct ipu_soc *ipu)
{
	ipu_module_disable(ipu, IPU_CONF_DC_EN);
}
EXPORT_SYMBOL_GPL(ipu_dc_disable);

static void ipu_dc_map_config(struct ipu_dc_priv *priv, enum ipu_dc_map map,
		int byte_num, int offset, int mask)
{
	int ptr = map * 3 + byte_num;
	u32 reg;

	reg = readl(priv->dc_reg + DC_MAP_CONF_VAL(ptr));
	reg &= ~(0xffff << (16 * (ptr & 0x1)));
	reg |= ((offset << 8) | mask) << (16 * (ptr & 0x1));
	writel(reg, priv->dc_reg + DC_MAP_CONF_VAL(ptr));

	reg = readl(priv->dc_reg + DC_MAP_CONF_PTR(map));
	reg &= ~(0x1f << ((16 * (map & 0x1)) + (5 * byte_num)));
	reg |= ptr << ((16 * (map & 0x1)) + (5 * byte_num));
	writel(reg, priv->dc_reg + DC_MAP_CONF_PTR(map));
}

static void ipu_dc_map_clear(struct ipu_dc_priv *priv, int map)
{
	u32 reg = readl(priv->dc_reg + DC_MAP_CONF_PTR(map));

	writel(reg & ~(0xffff << (16 * (map & 0x1))),
		     priv->dc_reg + DC_MAP_CONF_PTR(map));
}

struct ipu_dc *ipu_dc_get(struct ipu_soc *ipu, int channel)
{
	struct ipu_dc_priv *priv = ipu->dc_priv;
	struct ipu_dc *dc;

	if (channel >= IPU_DC_NUM_CHANNELS)
		return ERR_PTR(-ENODEV);

	dc = &priv->channels[channel];

	mutex_lock(&priv->mutex);

	if (dc->in_use) {
		mutex_unlock(&priv->mutex);
		return ERR_PTR(-EBUSY);
	}

	dc->in_use = true;

	mutex_unlock(&priv->mutex);

	return dc;
}
EXPORT_SYMBOL_GPL(ipu_dc_get);

void ipu_dc_put(struct ipu_dc *dc)
{
	struct ipu_dc_priv *priv = dc->priv;

	mutex_lock(&priv->mutex);
	dc->in_use = false;
	mutex_unlock(&priv->mutex);
}
EXPORT_SYMBOL_GPL(ipu_dc_put);

int ipu_dc_init(struct ipu_soc *ipu, struct device *dev,
		unsigned long base, unsigned long template_base)
{
	struct ipu_dc_priv *priv;
	static int channel_offsets[] = { 0, 0x1c, 0x38, 0x54, 0x58, 0x5c,
		0x78, 0, 0x94, 0xb4};
	int i, ret;

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

	mutex_init(&priv->mutex);

	priv->dev = dev;
	priv->ipu = ipu;
	priv->dc_reg = devm_ioremap(dev, base, PAGE_SIZE);
	priv->dc_tmpl_reg = devm_ioremap(dev, template_base, PAGE_SIZE);
	if (!priv->dc_reg || !priv->dc_tmpl_reg)
		return -ENOMEM;

	for (i = 0; i < IPU_DC_NUM_CHANNELS; i++) {
		priv->channels[i].chno = i;
		priv->channels[i].priv = priv;
		priv->channels[i].base = priv->dc_reg + channel_offsets[i];
	}

	priv->dc_irq = ipu_map_irq(ipu, IPU_IRQ_DC_FC_1);
	if (!priv->dc_irq)
		return -EINVAL;
	ret = devm_request_irq(dev, priv->dc_irq, dc_irq_handler, 0, NULL,
			       &priv->channels[1]);
	if (ret < 0)
		return ret;
	disable_irq(priv->dc_irq);
	priv->dp_irq = ipu_map_irq(ipu, IPU_IRQ_DP_SF_END);
	if (!priv->dp_irq)
		return -EINVAL;
	ret = devm_request_irq(dev, priv->dp_irq, dc_irq_handler, 0, NULL,
			       &priv->channels[5]);
	if (ret < 0)
		return ret;
	disable_irq(priv->dp_irq);

	writel(DC_WR_CH_CONF_WORD_SIZE_24 | DC_WR_CH_CONF_DISP_ID_PARALLEL(1) |
			DC_WR_CH_CONF_PROG_DI_ID,
			priv->channels[1].base + DC_WR_CH_CONF);
	writel(DC_WR_CH_CONF_WORD_SIZE_24 | DC_WR_CH_CONF_DISP_ID_PARALLEL(0),
			priv->channels[5].base + DC_WR_CH_CONF);

	writel(DC_GEN_SYNC_1_6_SYNC | DC_GEN_SYNC_PRIORITY_1,
		priv->dc_reg + DC_GEN);

	ipu->dc_priv = priv;

	dev_dbg(dev, "DC base: 0x%08lx template base: 0x%08lx\n",
			base, template_base);

	/* rgb24 */
	ipu_dc_map_clear(priv, IPU_DC_MAP_RGB24);
	ipu_dc_map_config(priv, IPU_DC_MAP_RGB24, 0, 7, 0xff); /* blue */
	ipu_dc_map_config(priv, IPU_DC_MAP_RGB24, 1, 15, 0xff); /* green */
	ipu_dc_map_config(priv, IPU_DC_MAP_RGB24, 2, 23, 0xff); /* red */

	/* rgb565 */
	ipu_dc_map_clear(priv, IPU_DC_MAP_RGB565);
	ipu_dc_map_config(priv, IPU_DC_MAP_RGB565, 0, 4, 0xf8); /* blue */
	ipu_dc_map_config(priv, IPU_DC_MAP_RGB565, 1, 10, 0xfc); /* green */
	ipu_dc_map_config(priv, IPU_DC_MAP_RGB565, 2, 15, 0xf8); /* red */

	/* gbr24 */
	ipu_dc_map_clear(priv, IPU_DC_MAP_GBR24);
	ipu_dc_map_config(priv, IPU_DC_MAP_GBR24, 2, 15, 0xff); /* green */
	ipu_dc_map_config(priv, IPU_DC_MAP_GBR24, 1, 7, 0xff); /* blue */
	ipu_dc_map_config(priv, IPU_DC_MAP_GBR24, 0, 23, 0xff); /* red */

	/* bgr666 */
	ipu_dc_map_clear(priv, IPU_DC_MAP_BGR666);
	ipu_dc_map_config(priv, IPU_DC_MAP_BGR666, 0, 5, 0xfc); /* blue */
	ipu_dc_map_config(priv, IPU_DC_MAP_BGR666, 1, 11, 0xfc); /* green */
	ipu_dc_map_config(priv, IPU_DC_MAP_BGR666, 2, 17, 0xfc); /* red */

	/* lvds666 */
	ipu_dc_map_clear(priv, IPU_DC_MAP_LVDS666);
	ipu_dc_map_config(priv, IPU_DC_MAP_LVDS666, 0, 5, 0xfc); /* blue */
	ipu_dc_map_config(priv, IPU_DC_MAP_LVDS666, 1, 13, 0xfc); /* green */
	ipu_dc_map_config(priv, IPU_DC_MAP_LVDS666, 2, 21, 0xfc); /* red */

	/* bgr24 */
	ipu_dc_map_clear(priv, IPU_DC_MAP_BGR24);
	ipu_dc_map_config(priv, IPU_DC_MAP_BGR24, 2, 7, 0xff); /* red */
	ipu_dc_map_config(priv, IPU_DC_MAP_BGR24, 1, 15, 0xff); /* green */
	ipu_dc_map_config(priv, IPU_DC_MAP_BGR24, 0, 23, 0xff); /* blue */

	return 0;
}

void ipu_dc_exit(struct ipu_soc *ipu)
{
}