xref: /openbmc/linux/drivers/gpu/ipu-v3/ipu-di.c (revision 2cf1c348) 
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Copyright (c) 2010 Sascha Hauer <s.hauer@pengutronix.de>
4  * Copyright (C) 2005-2009 Freescale Semiconductor, Inc.
5  */
6 #include <linux/export.h>
7 #include <linux/module.h>
8 #include <linux/types.h>
9 #include <linux/errno.h>
10 #include <linux/io.h>
11 #include <linux/err.h>
12 #include <linux/platform_device.h>
13 
14 #include <video/imx-ipu-v3.h>
15 #include "ipu-prv.h"
16 
17 struct ipu_di {
18 	void __iomem *base;
19 	int id;
20 	u32 module;
21 	struct clk *clk_di;	/* display input clock */
22 	struct clk *clk_ipu;	/* IPU bus clock */
23 	struct clk *clk_di_pixel; /* resulting pixel clock */
24 	bool inuse;
25 	struct ipu_soc *ipu;
26 };
27 
28 static DEFINE_MUTEX(di_mutex);
29 
30 struct di_sync_config {
31 	int run_count;
32 	int run_src;
33 	int offset_count;
34 	int offset_src;
35 	int repeat_count;
36 	int cnt_clr_src;
37 	int cnt_polarity_gen_en;
38 	int cnt_polarity_clr_src;
39 	int cnt_polarity_trigger_src;
40 	int cnt_up;
41 	int cnt_down;
42 };
43 
44 enum di_pins {
45 	DI_PIN11 = 0,
46 	DI_PIN12 = 1,
47 	DI_PIN13 = 2,
48 	DI_PIN14 = 3,
49 	DI_PIN15 = 4,
50 	DI_PIN16 = 5,
51 	DI_PIN17 = 6,
52 	DI_PIN_CS = 7,
53 
54 	DI_PIN_SER_CLK = 0,
55 	DI_PIN_SER_RS = 1,
56 };
57 
58 enum di_sync_wave {
59 	DI_SYNC_NONE = 0,
60 	DI_SYNC_CLK = 1,
61 	DI_SYNC_INT_HSYNC = 2,
62 	DI_SYNC_HSYNC = 3,
63 	DI_SYNC_VSYNC = 4,
64 	DI_SYNC_DE = 6,
65 
66 	DI_SYNC_CNT1 = 2,	/* counter >= 2 only */
67 	DI_SYNC_CNT4 = 5,	/* counter >= 5 only */
68 	DI_SYNC_CNT5 = 6,	/* counter >= 6 only */
69 };
70 
71 #define SYNC_WAVE 0
72 
73 #define DI_GENERAL		0x0000
74 #define DI_BS_CLKGEN0		0x0004
75 #define DI_BS_CLKGEN1		0x0008
76 #define DI_SW_GEN0(gen)		(0x000c + 4 * ((gen) - 1))
77 #define DI_SW_GEN1(gen)		(0x0030 + 4 * ((gen) - 1))
78 #define DI_STP_REP(gen)		(0x0148 + 4 * (((gen) - 1)/2))
79 #define DI_SYNC_AS_GEN		0x0054
80 #define DI_DW_GEN(gen)		(0x0058 + 4 * (gen))
81 #define DI_DW_SET(gen, set)	(0x0088 + 4 * ((gen) + 0xc * (set)))
82 #define DI_SER_CONF		0x015c
83 #define DI_SSC			0x0160
84 #define DI_POL			0x0164
85 #define DI_AW0			0x0168
86 #define DI_AW1			0x016c
87 #define DI_SCR_CONF		0x0170
88 #define DI_STAT			0x0174
89 
90 #define DI_SW_GEN0_RUN_COUNT(x)			((x) << 19)
91 #define DI_SW_GEN0_RUN_SRC(x)			((x) << 16)
92 #define DI_SW_GEN0_OFFSET_COUNT(x)		((x) << 3)
93 #define DI_SW_GEN0_OFFSET_SRC(x)		((x) << 0)
94 
95 #define DI_SW_GEN1_CNT_POL_GEN_EN(x)		((x) << 29)
96 #define DI_SW_GEN1_CNT_CLR_SRC(x)		((x) << 25)
97 #define DI_SW_GEN1_CNT_POL_TRIGGER_SRC(x)	((x) << 12)
98 #define DI_SW_GEN1_CNT_POL_CLR_SRC(x)		((x) << 9)
99 #define DI_SW_GEN1_CNT_DOWN(x)			((x) << 16)
100 #define DI_SW_GEN1_CNT_UP(x)			(x)
101 #define DI_SW_GEN1_AUTO_RELOAD			(0x10000000)
102 
103 #define DI_DW_GEN_ACCESS_SIZE_OFFSET		24
104 #define DI_DW_GEN_COMPONENT_SIZE_OFFSET		16
105 
106 #define DI_GEN_POLARITY_1			(1 << 0)
107 #define DI_GEN_POLARITY_2			(1 << 1)
108 #define DI_GEN_POLARITY_3			(1 << 2)
109 #define DI_GEN_POLARITY_4			(1 << 3)
110 #define DI_GEN_POLARITY_5			(1 << 4)
111 #define DI_GEN_POLARITY_6			(1 << 5)
112 #define DI_GEN_POLARITY_7			(1 << 6)
113 #define DI_GEN_POLARITY_8			(1 << 7)
114 #define DI_GEN_POLARITY_DISP_CLK		(1 << 17)
115 #define DI_GEN_DI_CLK_EXT			(1 << 20)
116 #define DI_GEN_DI_VSYNC_EXT			(1 << 21)
117 
118 #define DI_POL_DRDY_DATA_POLARITY		(1 << 7)
119 #define DI_POL_DRDY_POLARITY_15			(1 << 4)
120 
121 #define DI_VSYNC_SEL_OFFSET			13
122 
123 static inline u32 ipu_di_read(struct ipu_di *di, unsigned offset)
124 {
125 	return readl(di->base + offset);
126 }
127 
128 static inline void ipu_di_write(struct ipu_di *di, u32 value, unsigned offset)
129 {
130 	writel(value, di->base + offset);
131 }
132 
133 static void ipu_di_data_wave_config(struct ipu_di *di,
134 				     int wave_gen,
135 				     int access_size, int component_size)
136 {
137 	u32 reg;
138 	reg = (access_size << DI_DW_GEN_ACCESS_SIZE_OFFSET) |
139 	    (component_size << DI_DW_GEN_COMPONENT_SIZE_OFFSET);
140 	ipu_di_write(di, reg, DI_DW_GEN(wave_gen));
141 }
142 
143 static void ipu_di_data_pin_config(struct ipu_di *di, int wave_gen, int di_pin,
144 		int set, int up, int down)
145 {
146 	u32 reg;
147 
148 	reg = ipu_di_read(di, DI_DW_GEN(wave_gen));
149 	reg &= ~(0x3 << (di_pin * 2));
150 	reg |= set << (di_pin * 2);
151 	ipu_di_write(di, reg, DI_DW_GEN(wave_gen));
152 
153 	ipu_di_write(di, (down << 16) | up, DI_DW_SET(wave_gen, set));
154 }
155 
156 static void ipu_di_sync_config(struct ipu_di *di, struct di_sync_config *config,
157 		int start, int count)
158 {
159 	u32 reg;
160 	int i;
161 
162 	for (i = 0; i < count; i++) {
163 		struct di_sync_config *c = &config[i];
164 		int wave_gen = start + i + 1;
165 
166 		if ((c->run_count >= 0x1000) || (c->offset_count >= 0x1000) ||
167 				(c->repeat_count >= 0x1000) ||
168 				(c->cnt_up >= 0x400) ||
169 				(c->cnt_down >= 0x400)) {
170 			dev_err(di->ipu->dev, "DI%d counters out of range.\n",
171 					di->id);
172 			return;
173 		}
174 
175 		reg = DI_SW_GEN0_RUN_COUNT(c->run_count) |
176 			DI_SW_GEN0_RUN_SRC(c->run_src) |
177 			DI_SW_GEN0_OFFSET_COUNT(c->offset_count) |
178 			DI_SW_GEN0_OFFSET_SRC(c->offset_src);
179 		ipu_di_write(di, reg, DI_SW_GEN0(wave_gen));
180 
181 		reg = DI_SW_GEN1_CNT_POL_GEN_EN(c->cnt_polarity_gen_en) |
182 			DI_SW_GEN1_CNT_CLR_SRC(c->cnt_clr_src) |
183 			DI_SW_GEN1_CNT_POL_TRIGGER_SRC(
184 					c->cnt_polarity_trigger_src) |
185 			DI_SW_GEN1_CNT_POL_CLR_SRC(c->cnt_polarity_clr_src) |
186 			DI_SW_GEN1_CNT_DOWN(c->cnt_down) |
187 			DI_SW_GEN1_CNT_UP(c->cnt_up);
188 
189 		/* Enable auto reload */
190 		if (c->repeat_count == 0)
191 			reg |= DI_SW_GEN1_AUTO_RELOAD;
192 
193 		ipu_di_write(di, reg, DI_SW_GEN1(wave_gen));
194 
195 		reg = ipu_di_read(di, DI_STP_REP(wave_gen));
196 		reg &= ~(0xffff << (16 * ((wave_gen - 1) & 0x1)));
197 		reg |= c->repeat_count << (16 * ((wave_gen - 1) & 0x1));
198 		ipu_di_write(di, reg, DI_STP_REP(wave_gen));
199 	}
200 }
201 
202 static void ipu_di_sync_config_interlaced(struct ipu_di *di,
203 		struct ipu_di_signal_cfg *sig)
204 {
205 	u32 h_total = sig->mode.hactive + sig->mode.hsync_len +
206 		sig->mode.hback_porch + sig->mode.hfront_porch;
207 	u32 v_total = sig->mode.vactive + sig->mode.vsync_len +
208 		sig->mode.vback_porch + sig->mode.vfront_porch;
209 	struct di_sync_config cfg[] = {
210 		{
211 			/* 1: internal VSYNC for each frame */
212 			.run_count = v_total * 2 - 1,
213 			.run_src = 3,			/* == counter 7 */
214 		}, {
215 			/* PIN2: HSYNC waveform */
216 			.run_count = h_total - 1,
217 			.run_src = DI_SYNC_CLK,
218 			.cnt_polarity_gen_en = 1,
219 			.cnt_polarity_trigger_src = DI_SYNC_CLK,
220 			.cnt_down = sig->mode.hsync_len * 2,
221 		}, {
222 			/* PIN3: VSYNC waveform */
223 			.run_count = v_total - 1,
224 			.run_src = 4,			/* == counter 7 */
225 			.cnt_polarity_gen_en = 1,
226 			.cnt_polarity_trigger_src = 4,	/* == counter 7 */
227 			.cnt_down = sig->mode.vsync_len * 2,
228 			.cnt_clr_src = DI_SYNC_CNT1,
229 		}, {
230 			/* 4: Field */
231 			.run_count = v_total / 2,
232 			.run_src = DI_SYNC_HSYNC,
233 			.offset_count = h_total / 2,
234 			.offset_src = DI_SYNC_CLK,
235 			.repeat_count = 2,
236 			.cnt_clr_src = DI_SYNC_CNT1,
237 		}, {
238 			/* 5: Active lines */
239 			.run_src = DI_SYNC_HSYNC,
240 			.offset_count = (sig->mode.vsync_len +
241 					 sig->mode.vback_porch) / 2,
242 			.offset_src = DI_SYNC_HSYNC,
243 			.repeat_count = sig->mode.vactive / 2,
244 			.cnt_clr_src = DI_SYNC_CNT4,
245 		}, {
246 			/* 6: Active pixel, referenced by DC */
247 			.run_src = DI_SYNC_CLK,
248 			.offset_count = sig->mode.hsync_len +
249 					sig->mode.hback_porch,
250 			.offset_src = DI_SYNC_CLK,
251 			.repeat_count = sig->mode.hactive,
252 			.cnt_clr_src = DI_SYNC_CNT5,
253 		}, {
254 			/* 7: Half line HSYNC */
255 			.run_count = h_total / 2 - 1,
256 			.run_src = DI_SYNC_CLK,
257 		}
258 	};
259 
260 	ipu_di_sync_config(di, cfg, 0, ARRAY_SIZE(cfg));
261 
262 	ipu_di_write(di, v_total / 2 - 1, DI_SCR_CONF);
263 }
264 
265 static void ipu_di_sync_config_noninterlaced(struct ipu_di *di,
266 		struct ipu_di_signal_cfg *sig, int div)
267 {
268 	u32 h_total = sig->mode.hactive + sig->mode.hsync_len +
269 		sig->mode.hback_porch + sig->mode.hfront_porch;
270 	u32 v_total = sig->mode.vactive + sig->mode.vsync_len +
271 		sig->mode.vback_porch + sig->mode.vfront_porch;
272 	struct di_sync_config cfg[] = {
273 		{
274 			/* 1: INT_HSYNC */
275 			.run_count = h_total - 1,
276 			.run_src = DI_SYNC_CLK,
277 		} , {
278 			/* PIN2: HSYNC */
279 			.run_count = h_total - 1,
280 			.run_src = DI_SYNC_CLK,
281 			.offset_count = div * sig->v_to_h_sync,
282 			.offset_src = DI_SYNC_CLK,
283 			.cnt_polarity_gen_en = 1,
284 			.cnt_polarity_trigger_src = DI_SYNC_CLK,
285 			.cnt_down = sig->mode.hsync_len * 2,
286 		} , {
287 			/* PIN3: VSYNC */
288 			.run_count = v_total - 1,
289 			.run_src = DI_SYNC_INT_HSYNC,
290 			.cnt_polarity_gen_en = 1,
291 			.cnt_polarity_trigger_src = DI_SYNC_INT_HSYNC,
292 			.cnt_down = sig->mode.vsync_len * 2,
293 		} , {
294 			/* 4: Line Active */
295 			.run_src = DI_SYNC_HSYNC,
296 			.offset_count = sig->mode.vsync_len +
297 					sig->mode.vback_porch,
298 			.offset_src = DI_SYNC_HSYNC,
299 			.repeat_count = sig->mode.vactive,
300 			.cnt_clr_src = DI_SYNC_VSYNC,
301 		} , {
302 			/* 5: Pixel Active, referenced by DC */
303 			.run_src = DI_SYNC_CLK,
304 			.offset_count = sig->mode.hsync_len +
305 					sig->mode.hback_porch,
306 			.offset_src = DI_SYNC_CLK,
307 			.repeat_count = sig->mode.hactive,
308 			.cnt_clr_src = 5, /* Line Active */
309 		} , {
310 			/* unused */
311 		} , {
312 			/* unused */
313 		},
314 	};
315 	/* can't use #7 and #8 for line active and pixel active counters */
316 	struct di_sync_config cfg_vga[] = {
317 		{
318 			/* 1: INT_HSYNC */
319 			.run_count = h_total - 1,
320 			.run_src = DI_SYNC_CLK,
321 		} , {
322 			/* 2: VSYNC */
323 			.run_count = v_total - 1,
324 			.run_src = DI_SYNC_INT_HSYNC,
325 		} , {
326 			/* 3: Line Active */
327 			.run_src = DI_SYNC_INT_HSYNC,
328 			.offset_count = sig->mode.vsync_len +
329 					sig->mode.vback_porch,
330 			.offset_src = DI_SYNC_INT_HSYNC,
331 			.repeat_count = sig->mode.vactive,
332 			.cnt_clr_src = 3 /* VSYNC */,
333 		} , {
334 			/* PIN4: HSYNC for VGA via TVEv2 on TQ MBa53 */
335 			.run_count = h_total - 1,
336 			.run_src = DI_SYNC_CLK,
337 			.offset_count = div * sig->v_to_h_sync + 18, /* magic value from Freescale TVE driver */
338 			.offset_src = DI_SYNC_CLK,
339 			.cnt_polarity_gen_en = 1,
340 			.cnt_polarity_trigger_src = DI_SYNC_CLK,
341 			.cnt_down = sig->mode.hsync_len * 2,
342 		} , {
343 			/* 5: Pixel Active signal to DC */
344 			.run_src = DI_SYNC_CLK,
345 			.offset_count = sig->mode.hsync_len +
346 					sig->mode.hback_porch,
347 			.offset_src = DI_SYNC_CLK,
348 			.repeat_count = sig->mode.hactive,
349 			.cnt_clr_src = 4, /* Line Active */
350 		} , {
351 			/* PIN6: VSYNC for VGA via TVEv2 on TQ MBa53 */
352 			.run_count = v_total - 1,
353 			.run_src = DI_SYNC_INT_HSYNC,
354 			.offset_count = 1, /* magic value from Freescale TVE driver */
355 			.offset_src = DI_SYNC_INT_HSYNC,
356 			.cnt_polarity_gen_en = 1,
357 			.cnt_polarity_trigger_src = DI_SYNC_INT_HSYNC,
358 			.cnt_down = sig->mode.vsync_len * 2,
359 		} , {
360 			/* PIN4: HSYNC for VGA via TVEv2 on i.MX53-QSB */
361 			.run_count = h_total - 1,
362 			.run_src = DI_SYNC_CLK,
363 			.offset_count = div * sig->v_to_h_sync + 18, /* magic value from Freescale TVE driver */
364 			.offset_src = DI_SYNC_CLK,
365 			.cnt_polarity_gen_en = 1,
366 			.cnt_polarity_trigger_src = DI_SYNC_CLK,
367 			.cnt_down = sig->mode.hsync_len * 2,
368 		} , {
369 			/* PIN6: VSYNC for VGA via TVEv2 on i.MX53-QSB */
370 			.run_count = v_total - 1,
371 			.run_src = DI_SYNC_INT_HSYNC,
372 			.offset_count = 1, /* magic value from Freescale TVE driver */
373 			.offset_src = DI_SYNC_INT_HSYNC,
374 			.cnt_polarity_gen_en = 1,
375 			.cnt_polarity_trigger_src = DI_SYNC_INT_HSYNC,
376 			.cnt_down = sig->mode.vsync_len * 2,
377 		} , {
378 			/* unused */
379 		},
380 	};
381 
382 	ipu_di_write(di, v_total - 1, DI_SCR_CONF);
383 	if (sig->hsync_pin == 2 && sig->vsync_pin == 3)
384 		ipu_di_sync_config(di, cfg, 0, ARRAY_SIZE(cfg));
385 	else
386 		ipu_di_sync_config(di, cfg_vga, 0, ARRAY_SIZE(cfg_vga));
387 }
388 
389 static void ipu_di_config_clock(struct ipu_di *di,
390 	const struct ipu_di_signal_cfg *sig)
391 {
392 	struct clk *clk;
393 	unsigned clkgen0;
394 	uint32_t val;
395 
396 	if (sig->clkflags & IPU_DI_CLKMODE_EXT) {
397 		/*
398 		 * CLKMODE_EXT means we must use the DI clock: this is
399 		 * needed for things like LVDS which needs to feed the
400 		 * DI and LDB with the same pixel clock.
401 		 */
402 		clk = di->clk_di;
403 
404 		if (sig->clkflags & IPU_DI_CLKMODE_SYNC) {
405 			/*
406 			 * CLKMODE_SYNC means that we want the DI to be
407 			 * clocked at the same rate as the parent clock.
408 			 * This is needed (eg) for LDB which needs to be
409 			 * fed with the same pixel clock.  We assume that
410 			 * the LDB clock has already been set correctly.
411 			 */
412 			clkgen0 = 1 << 4;
413 		} else {
414 			/*
415 			 * We can use the divider.  We should really have
416 			 * a flag here indicating whether the bridge can
417 			 * cope with a fractional divider or not.  For the
418 			 * time being, let's go for simplicitly and
419 			 * reliability.
420 			 */
421 			unsigned long in_rate;
422 			unsigned div;
423 
424 			clk_set_rate(clk, sig->mode.pixelclock);
425 
426 			in_rate = clk_get_rate(clk);
427 			div = DIV_ROUND_CLOSEST(in_rate, sig->mode.pixelclock);
428 			div = clamp(div, 1U, 255U);
429 
430 			clkgen0 = div << 4;
431 		}
432 	} else {
433 		/*
434 		 * For other interfaces, we can arbitarily select between
435 		 * the DI specific clock and the internal IPU clock.  See
436 		 * DI_GENERAL bit 20.  We select the IPU clock if it can
437 		 * give us a clock rate within 1% of the requested frequency,
438 		 * otherwise we use the DI clock.
439 		 */
440 		unsigned long rate, clkrate;
441 		unsigned div, error;
442 
443 		clkrate = clk_get_rate(di->clk_ipu);
444 		div = DIV_ROUND_CLOSEST(clkrate, sig->mode.pixelclock);
445 		div = clamp(div, 1U, 255U);
446 		rate = clkrate / div;
447 
448 		error = rate / (sig->mode.pixelclock / 1000);
449 
450 		dev_dbg(di->ipu->dev, "  IPU clock can give %lu with divider %u, error %d.%u%%\n",
451 			rate, div, (signed)(error - 1000) / 10, error % 10);
452 
453 		/* Allow a 1% error */
454 		if (error < 1010 && error >= 990) {
455 			clk = di->clk_ipu;
456 
457 			clkgen0 = div << 4;
458 		} else {
459 			unsigned long in_rate;
460 			unsigned div;
461 
462 			clk = di->clk_di;
463 
464 			clk_set_rate(clk, sig->mode.pixelclock);
465 
466 			in_rate = clk_get_rate(clk);
467 			div = DIV_ROUND_CLOSEST(in_rate, sig->mode.pixelclock);
468 			div = clamp(div, 1U, 255U);
469 
470 			clkgen0 = div << 4;
471 		}
472 	}
473 
474 	di->clk_di_pixel = clk;
475 
476 	/* Set the divider */
477 	ipu_di_write(di, clkgen0, DI_BS_CLKGEN0);
478 
479 	/*
480 	 * Set the high/low periods.  Bits 24:16 give us the falling edge,
481 	 * and bits 8:0 give the rising edge.  LSB is fraction, and is
482 	 * based on the divider above.  We want a 50% duty cycle, so set
483 	 * the falling edge to be half the divider.
484 	 */
485 	ipu_di_write(di, (clkgen0 >> 4) << 16, DI_BS_CLKGEN1);
486 
487 	/* Finally select the input clock */
488 	val = ipu_di_read(di, DI_GENERAL) & ~DI_GEN_DI_CLK_EXT;
489 	if (clk == di->clk_di)
490 		val |= DI_GEN_DI_CLK_EXT;
491 	ipu_di_write(di, val, DI_GENERAL);
492 
493 	dev_dbg(di->ipu->dev, "Want %luHz IPU %luHz DI %luHz using %s, %luHz\n",
494 		sig->mode.pixelclock,
495 		clk_get_rate(di->clk_ipu),
496 		clk_get_rate(di->clk_di),
497 		clk == di->clk_di ? "DI" : "IPU",
498 		clk_get_rate(di->clk_di_pixel) / (clkgen0 >> 4));
499 }
500 
501 /*
502  * This function is called to adjust a video mode to IPU restrictions.
503  * It is meant to be called from drm crtc mode_fixup() methods.
504  */
505 int ipu_di_adjust_videomode(struct ipu_di *di, struct videomode *mode)
506 {
507 	u32 diff;
508 
509 	if (!IS_ALIGNED(mode->hactive, 8) &&
510 	    mode->hfront_porch < ALIGN(mode->hactive, 8) - mode->hactive) {
511 		dev_err(di->ipu->dev, "hactive %d is not aligned to 8 and front porch is too small to compensate\n",
512 			mode->hactive);
513 		return -EINVAL;
514 	}
515 
516 	if (mode->vfront_porch >= 2)
517 		return 0;
518 
519 	diff = 2 - mode->vfront_porch;
520 
521 	if (mode->vback_porch >= diff) {
522 		mode->vfront_porch = 2;
523 		mode->vback_porch -= diff;
524 	} else if (mode->vsync_len > diff) {
525 		mode->vfront_porch = 2;
526 		mode->vsync_len = mode->vsync_len - diff;
527 	} else {
528 		dev_warn(di->ipu->dev, "failed to adjust videomode\n");
529 		return -EINVAL;
530 	}
531 
532 	dev_dbg(di->ipu->dev, "videomode adapted for IPU restrictions\n");
533 	return 0;
534 }
535 EXPORT_SYMBOL_GPL(ipu_di_adjust_videomode);
536 
537 static u32 ipu_di_gen_polarity(int pin)
538 {
539 	switch (pin) {
540 	case 1:
541 		return DI_GEN_POLARITY_1;
542 	case 2:
543 		return DI_GEN_POLARITY_2;
544 	case 3:
545 		return DI_GEN_POLARITY_3;
546 	case 4:
547 		return DI_GEN_POLARITY_4;
548 	case 5:
549 		return DI_GEN_POLARITY_5;
550 	case 6:
551 		return DI_GEN_POLARITY_6;
552 	case 7:
553 		return DI_GEN_POLARITY_7;
554 	case 8:
555 		return DI_GEN_POLARITY_8;
556 	}
557 	return 0;
558 }
559 
560 int ipu_di_init_sync_panel(struct ipu_di *di, struct ipu_di_signal_cfg *sig)
561 {
562 	u32 reg;
563 	u32 di_gen, vsync_cnt;
564 	u32 div;
565 
566 	dev_dbg(di->ipu->dev, "disp %d: panel size = %d x %d\n",
567 		di->id, sig->mode.hactive, sig->mode.vactive);
568 
569 	dev_dbg(di->ipu->dev, "Clocks: IPU %luHz DI %luHz Needed %luHz\n",
570 		clk_get_rate(di->clk_ipu),
571 		clk_get_rate(di->clk_di),
572 		sig->mode.pixelclock);
573 
574 	mutex_lock(&di_mutex);
575 
576 	ipu_di_config_clock(di, sig);
577 
578 	div = ipu_di_read(di, DI_BS_CLKGEN0) & 0xfff;
579 	div = div / 16;		/* Now divider is integer portion */
580 
581 	/* Setup pixel clock timing */
582 	/* Down time is half of period */
583 	ipu_di_write(di, (div << 16), DI_BS_CLKGEN1);
584 
585 	ipu_di_data_wave_config(di, SYNC_WAVE, div - 1, div - 1);
586 	ipu_di_data_pin_config(di, SYNC_WAVE, DI_PIN15, 3, 0, div * 2);
587 
588 	di_gen = ipu_di_read(di, DI_GENERAL) & DI_GEN_DI_CLK_EXT;
589 	di_gen |= DI_GEN_DI_VSYNC_EXT;
590 
591 	if (sig->mode.flags & DISPLAY_FLAGS_INTERLACED) {
592 		ipu_di_sync_config_interlaced(di, sig);
593 
594 		/* set y_sel = 1 */
595 		di_gen |= 0x10000000;
596 
597 		vsync_cnt = 3;
598 	} else {
599 		ipu_di_sync_config_noninterlaced(di, sig, div);
600 
601 		vsync_cnt = 3;
602 		if (di->id == 1)
603 			/*
604 			 * TODO: change only for TVEv2, parallel display
605 			 * uses pin 2 / 3
606 			 */
607 			if (!(sig->hsync_pin == 2 && sig->vsync_pin == 3))
608 				vsync_cnt = 6;
609 	}
610 
611 	if (sig->mode.flags & DISPLAY_FLAGS_HSYNC_HIGH)
612 		di_gen |= ipu_di_gen_polarity(sig->hsync_pin);
613 	if (sig->mode.flags & DISPLAY_FLAGS_VSYNC_HIGH)
614 		di_gen |= ipu_di_gen_polarity(sig->vsync_pin);
615 
616 	if (sig->clk_pol)
617 		di_gen |= DI_GEN_POLARITY_DISP_CLK;
618 
619 	ipu_di_write(di, di_gen, DI_GENERAL);
620 
621 	ipu_di_write(di, (--vsync_cnt << DI_VSYNC_SEL_OFFSET) | 0x00000002,
622 		     DI_SYNC_AS_GEN);
623 
624 	reg = ipu_di_read(di, DI_POL);
625 	reg &= ~(DI_POL_DRDY_DATA_POLARITY | DI_POL_DRDY_POLARITY_15);
626 
627 	if (sig->enable_pol)
628 		reg |= DI_POL_DRDY_POLARITY_15;
629 	if (sig->data_pol)
630 		reg |= DI_POL_DRDY_DATA_POLARITY;
631 
632 	ipu_di_write(di, reg, DI_POL);
633 
634 	mutex_unlock(&di_mutex);
635 
636 	return 0;
637 }
638 EXPORT_SYMBOL_GPL(ipu_di_init_sync_panel);
639 
640 int ipu_di_enable(struct ipu_di *di)
641 {
642 	int ret;
643 
644 	WARN_ON(IS_ERR(di->clk_di_pixel));
645 
646 	ret = clk_prepare_enable(di->clk_di_pixel);
647 	if (ret)
648 		return ret;
649 
650 	ipu_module_enable(di->ipu, di->module);
651 
652 	return 0;
653 }
654 EXPORT_SYMBOL_GPL(ipu_di_enable);
655 
656 int ipu_di_disable(struct ipu_di *di)
657 {
658 	WARN_ON(IS_ERR(di->clk_di_pixel));
659 
660 	ipu_module_disable(di->ipu, di->module);
661 
662 	clk_disable_unprepare(di->clk_di_pixel);
663 
664 	return 0;
665 }
666 EXPORT_SYMBOL_GPL(ipu_di_disable);
667 
668 int ipu_di_get_num(struct ipu_di *di)
669 {
670 	return di->id;
671 }
672 EXPORT_SYMBOL_GPL(ipu_di_get_num);
673 
674 static DEFINE_MUTEX(ipu_di_lock);
675 
676 struct ipu_di *ipu_di_get(struct ipu_soc *ipu, int disp)
677 {
678 	struct ipu_di *di;
679 
680 	if (disp > 1)
681 		return ERR_PTR(-EINVAL);
682 
683 	di = ipu->di_priv[disp];
684 
685 	mutex_lock(&ipu_di_lock);
686 
687 	if (di->inuse) {
688 		di = ERR_PTR(-EBUSY);
689 		goto out;
690 	}
691 
692 	di->inuse = true;
693 out:
694 	mutex_unlock(&ipu_di_lock);
695 
696 	return di;
697 }
698 EXPORT_SYMBOL_GPL(ipu_di_get);
699 
700 void ipu_di_put(struct ipu_di *di)
701 {
702 	mutex_lock(&ipu_di_lock);
703 
704 	di->inuse = false;
705 
706 	mutex_unlock(&ipu_di_lock);
707 }
708 EXPORT_SYMBOL_GPL(ipu_di_put);
709 
710 int ipu_di_init(struct ipu_soc *ipu, struct device *dev, int id,
711 		unsigned long base,
712 		u32 module, struct clk *clk_ipu)
713 {
714 	struct ipu_di *di;
715 
716 	if (id > 1)
717 		return -ENODEV;
718 
719 	di = devm_kzalloc(dev, sizeof(*di), GFP_KERNEL);
720 	if (!di)
721 		return -ENOMEM;
722 
723 	ipu->di_priv[id] = di;
724 
725 	di->clk_di = devm_clk_get(dev, id ? "di1" : "di0");
726 	if (IS_ERR(di->clk_di))
727 		return PTR_ERR(di->clk_di);
728 
729 	di->module = module;
730 	di->id = id;
731 	di->clk_ipu = clk_ipu;
732 	di->base = devm_ioremap(dev, base, PAGE_SIZE);
733 	if (!di->base)
734 		return -ENOMEM;
735 
736 	ipu_di_write(di, 0x10, DI_BS_CLKGEN0);
737 
738 	dev_dbg(dev, "DI%d base: 0x%08lx remapped to %p\n",
739 			id, base, di->base);
740 	di->inuse = false;
741 	di->ipu = ipu;
742 
743 	return 0;
744 }
745 
746 void ipu_di_exit(struct ipu_soc *ipu, int id)
747 {
748 }
749