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Linux 4.16.11
[linux/fpc-iii.git] / drivers / gpu / ipu-v3 / ipu-di.c
blobd2f1bd9d3deb52fe78e19e13bda367400a9463c4
1 /*
2 * Copyright (c) 2010 Sascha Hauer <s.hauer@pengutronix.de>
3 * Copyright (C) 2005-2009 Freescale Semiconductor, Inc.
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 as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
12 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * for more details.
14 */
15 #include <linux/export.h>
16 #include <linux/module.h>
17 #include <linux/types.h>
18 #include <linux/errno.h>
19 #include <linux/io.h>
20 #include <linux/err.h>
21 #include <linux/platform_device.h>
22
23 #include <video/imx-ipu-v3.h>
24 #include "ipu-prv.h"
25
26 struct ipu_di {
27 void __iomem *base;
28 int id;
29 u32 module;
30 struct clk *clk_di; /* display input clock */
31 struct clk *clk_ipu; /* IPU bus clock */
32 struct clk *clk_di_pixel; /* resulting pixel clock */
33 bool inuse;
34 struct ipu_soc *ipu;
35 };
36
37 static DEFINE_MUTEX(di_mutex);
38
39 struct di_sync_config {
40 int run_count;
41 int run_src;
42 int offset_count;
43 int offset_src;
44 int repeat_count;
45 int cnt_clr_src;
46 int cnt_polarity_gen_en;
47 int cnt_polarity_clr_src;
48 int cnt_polarity_trigger_src;
49 int cnt_up;
50 int cnt_down;
51 };
52
53 enum di_pins {
54 DI_PIN11 = 0,
55 DI_PIN12 = 1,
56 DI_PIN13 = 2,
57 DI_PIN14 = 3,
58 DI_PIN15 = 4,
59 DI_PIN16 = 5,
60 DI_PIN17 = 6,
61 DI_PIN_CS = 7,
62
63 DI_PIN_SER_CLK = 0,
64 DI_PIN_SER_RS = 1,
65 };
66
67 enum di_sync_wave {
68 DI_SYNC_NONE = 0,
69 DI_SYNC_CLK = 1,
70 DI_SYNC_INT_HSYNC = 2,
71 DI_SYNC_HSYNC = 3,
72 DI_SYNC_VSYNC = 4,
73 DI_SYNC_DE = 6,
74
75 DI_SYNC_CNT1 = 2, /* counter >= 2 only */
76 DI_SYNC_CNT4 = 5, /* counter >= 5 only */
77 DI_SYNC_CNT5 = 6, /* counter >= 6 only */
78 };
79
80 #define SYNC_WAVE 0
81
82 #define DI_GENERAL 0x0000
83 #define DI_BS_CLKGEN0 0x0004
84 #define DI_BS_CLKGEN1 0x0008
85 #define DI_SW_GEN0(gen) (0x000c + 4 * ((gen) - 1))
86 #define DI_SW_GEN1(gen) (0x0030 + 4 * ((gen) - 1))
87 #define DI_STP_REP(gen) (0x0148 + 4 * (((gen) - 1)/2))
88 #define DI_SYNC_AS_GEN 0x0054
89 #define DI_DW_GEN(gen) (0x0058 + 4 * (gen))
90 #define DI_DW_SET(gen, set) (0x0088 + 4 * ((gen) + 0xc * (set)))
91 #define DI_SER_CONF 0x015c
92 #define DI_SSC 0x0160
93 #define DI_POL 0x0164
94 #define DI_AW0 0x0168
95 #define DI_AW1 0x016c
96 #define DI_SCR_CONF 0x0170
97 #define DI_STAT 0x0174
98
99 #define DI_SW_GEN0_RUN_COUNT(x) ((x) << 19)
100 #define DI_SW_GEN0_RUN_SRC(x) ((x) << 16)
101 #define DI_SW_GEN0_OFFSET_COUNT(x) ((x) << 3)
102 #define DI_SW_GEN0_OFFSET_SRC(x) ((x) << 0)
103
104 #define DI_SW_GEN1_CNT_POL_GEN_EN(x) ((x) << 29)
105 #define DI_SW_GEN1_CNT_CLR_SRC(x) ((x) << 25)
106 #define DI_SW_GEN1_CNT_POL_TRIGGER_SRC(x) ((x) << 12)
107 #define DI_SW_GEN1_CNT_POL_CLR_SRC(x) ((x) << 9)
108 #define DI_SW_GEN1_CNT_DOWN(x) ((x) << 16)
109 #define DI_SW_GEN1_CNT_UP(x) (x)
110 #define DI_SW_GEN1_AUTO_RELOAD (0x10000000)
111
112 #define DI_DW_GEN_ACCESS_SIZE_OFFSET 24
113 #define DI_DW_GEN_COMPONENT_SIZE_OFFSET 16
114
115 #define DI_GEN_POLARITY_1 (1 << 0)
116 #define DI_GEN_POLARITY_2 (1 << 1)
117 #define DI_GEN_POLARITY_3 (1 << 2)
118 #define DI_GEN_POLARITY_4 (1 << 3)
119 #define DI_GEN_POLARITY_5 (1 << 4)
120 #define DI_GEN_POLARITY_6 (1 << 5)
121 #define DI_GEN_POLARITY_7 (1 << 6)
122 #define DI_GEN_POLARITY_8 (1 << 7)
123 #define DI_GEN_POLARITY_DISP_CLK (1 << 17)
124 #define DI_GEN_DI_CLK_EXT (1 << 20)
125 #define DI_GEN_DI_VSYNC_EXT (1 << 21)
126
127 #define DI_POL_DRDY_DATA_POLARITY (1 << 7)
128 #define DI_POL_DRDY_POLARITY_15 (1 << 4)
129
130 #define DI_VSYNC_SEL_OFFSET 13
131
132 static inline u32 ipu_di_read(struct ipu_di *di, unsigned offset)
133 {
134 return readl(di->base + offset);
135 }
136
137 static inline void ipu_di_write(struct ipu_di *di, u32 value, unsigned offset)
138 {
139 writel(value, di->base + offset);
140 }
141
142 static void ipu_di_data_wave_config(struct ipu_di *di,
143 int wave_gen,
144 int access_size, int component_size)
145 {
146 u32 reg;
147 reg = (access_size << DI_DW_GEN_ACCESS_SIZE_OFFSET) |
148 (component_size << DI_DW_GEN_COMPONENT_SIZE_OFFSET);
149 ipu_di_write(di, reg, DI_DW_GEN(wave_gen));
150 }
151
152 static void ipu_di_data_pin_config(struct ipu_di *di, int wave_gen, int di_pin,
153 int set, int up, int down)
154 {
155 u32 reg;
156
157 reg = ipu_di_read(di, DI_DW_GEN(wave_gen));
158 reg &= ~(0x3 << (di_pin * 2));
159 reg |= set << (di_pin * 2);
160 ipu_di_write(di, reg, DI_DW_GEN(wave_gen));
161
162 ipu_di_write(di, (down << 16) | up, DI_DW_SET(wave_gen, set));
163 }
164
165 static void ipu_di_sync_config(struct ipu_di *di, struct di_sync_config *config,
166 int start, int count)
167 {
168 u32 reg;
169 int i;
170
171 for (i = 0; i < count; i++) {
172 struct di_sync_config *c = &config[i];
173 int wave_gen = start + i + 1;
174
175 if ((c->run_count >= 0x1000) || (c->offset_count >= 0x1000) ||
176 (c->repeat_count >= 0x1000) ||
177 (c->cnt_up >= 0x400) ||
178 (c->cnt_down >= 0x400)) {
179 dev_err(di->ipu->dev, "DI%d counters out of range.\n",
180 di->id);
181 return;
182 }
183
184 reg = DI_SW_GEN0_RUN_COUNT(c->run_count) |
185 DI_SW_GEN0_RUN_SRC(c->run_src) |
186 DI_SW_GEN0_OFFSET_COUNT(c->offset_count) |
187 DI_SW_GEN0_OFFSET_SRC(c->offset_src);
188 ipu_di_write(di, reg, DI_SW_GEN0(wave_gen));
189
190 reg = DI_SW_GEN1_CNT_POL_GEN_EN(c->cnt_polarity_gen_en) |
191 DI_SW_GEN1_CNT_CLR_SRC(c->cnt_clr_src) |
192 DI_SW_GEN1_CNT_POL_TRIGGER_SRC(
193 c->cnt_polarity_trigger_src) |
194 DI_SW_GEN1_CNT_POL_CLR_SRC(c->cnt_polarity_clr_src) |
195 DI_SW_GEN1_CNT_DOWN(c->cnt_down) |
196 DI_SW_GEN1_CNT_UP(c->cnt_up);
197
198 /* Enable auto reload */
199 if (c->repeat_count == 0)
200 reg |= DI_SW_GEN1_AUTO_RELOAD;
201
202 ipu_di_write(di, reg, DI_SW_GEN1(wave_gen));
203
204 reg = ipu_di_read(di, DI_STP_REP(wave_gen));
205 reg &= ~(0xffff << (16 * ((wave_gen - 1) & 0x1)));
206 reg |= c->repeat_count << (16 * ((wave_gen - 1) & 0x1));
207 ipu_di_write(di, reg, DI_STP_REP(wave_gen));
208 }
209 }
210
211 static void ipu_di_sync_config_interlaced(struct ipu_di *di,
212 struct ipu_di_signal_cfg *sig)
213 {
214 u32 h_total = sig->mode.hactive + sig->mode.hsync_len +
215 sig->mode.hback_porch + sig->mode.hfront_porch;
216 u32 v_total = sig->mode.vactive + sig->mode.vsync_len +
217 sig->mode.vback_porch + sig->mode.vfront_porch;
218 struct di_sync_config cfg[] = {
219 {
220 /* 1: internal VSYNC for each frame */
221 .run_count = v_total * 2 - 1,
222 .run_src = 3, /* == counter 7 */
223 }, {
224 /* PIN2: HSYNC waveform */
225 .run_count = h_total - 1,
226 .run_src = DI_SYNC_CLK,
227 .cnt_polarity_gen_en = 1,
228 .cnt_polarity_trigger_src = DI_SYNC_CLK,
229 .cnt_down = sig->mode.hsync_len * 2,
230 }, {
231 /* PIN3: VSYNC waveform */
232 .run_count = v_total - 1,
233 .run_src = 4, /* == counter 7 */
234 .cnt_polarity_gen_en = 1,
235 .cnt_polarity_trigger_src = 4, /* == counter 7 */
236 .cnt_down = sig->mode.vsync_len * 2,
237 .cnt_clr_src = DI_SYNC_CNT1,
238 }, {
239 /* 4: Field */
240 .run_count = v_total / 2,
241 .run_src = DI_SYNC_HSYNC,
242 .offset_count = h_total / 2,
243 .offset_src = DI_SYNC_CLK,
244 .repeat_count = 2,
245 .cnt_clr_src = DI_SYNC_CNT1,
246 }, {
247 /* 5: Active lines */
248 .run_src = DI_SYNC_HSYNC,
249 .offset_count = (sig->mode.vsync_len +
250 sig->mode.vback_porch) / 2,
251 .offset_src = DI_SYNC_HSYNC,
252 .repeat_count = sig->mode.vactive / 2,
253 .cnt_clr_src = DI_SYNC_CNT4,
254 }, {
255 /* 6: Active pixel, referenced by DC */
256 .run_src = DI_SYNC_CLK,
257 .offset_count = sig->mode.hsync_len +
258 sig->mode.hback_porch,
259 .offset_src = DI_SYNC_CLK,
260 .repeat_count = sig->mode.hactive,
261 .cnt_clr_src = DI_SYNC_CNT5,
262 }, {
263 /* 7: Half line HSYNC */
264 .run_count = h_total / 2 - 1,
265 .run_src = DI_SYNC_CLK,
266 }
267 };
268
269 ipu_di_sync_config(di, cfg, 0, ARRAY_SIZE(cfg));
270
271 ipu_di_write(di, v_total / 2 - 1, DI_SCR_CONF);
272 }
273
274 static void ipu_di_sync_config_noninterlaced(struct ipu_di *di,
275 struct ipu_di_signal_cfg *sig, int div)
276 {
277 u32 h_total = sig->mode.hactive + sig->mode.hsync_len +
278 sig->mode.hback_porch + sig->mode.hfront_porch;
279 u32 v_total = sig->mode.vactive + sig->mode.vsync_len +
280 sig->mode.vback_porch + sig->mode.vfront_porch;
281 struct di_sync_config cfg[] = {
282 {
283 /* 1: INT_HSYNC */
284 .run_count = h_total - 1,
285 .run_src = DI_SYNC_CLK,
286 } , {
287 /* PIN2: HSYNC */
288 .run_count = h_total - 1,
289 .run_src = DI_SYNC_CLK,
290 .offset_count = div * sig->v_to_h_sync,
291 .offset_src = DI_SYNC_CLK,
292 .cnt_polarity_gen_en = 1,
293 .cnt_polarity_trigger_src = DI_SYNC_CLK,
294 .cnt_down = sig->mode.hsync_len * 2,
295 } , {
296 /* PIN3: VSYNC */
297 .run_count = v_total - 1,
298 .run_src = DI_SYNC_INT_HSYNC,
299 .cnt_polarity_gen_en = 1,
300 .cnt_polarity_trigger_src = DI_SYNC_INT_HSYNC,
301 .cnt_down = sig->mode.vsync_len * 2,
302 } , {
303 /* 4: Line Active */
304 .run_src = DI_SYNC_HSYNC,
305 .offset_count = sig->mode.vsync_len +
306 sig->mode.vback_porch,
307 .offset_src = DI_SYNC_HSYNC,
308 .repeat_count = sig->mode.vactive,
309 .cnt_clr_src = DI_SYNC_VSYNC,
310 } , {
311 /* 5: Pixel Active, referenced by DC */
312 .run_src = DI_SYNC_CLK,
313 .offset_count = sig->mode.hsync_len +
314 sig->mode.hback_porch,
315 .offset_src = DI_SYNC_CLK,
316 .repeat_count = sig->mode.hactive,
317 .cnt_clr_src = 5, /* Line Active */
318 } , {
319 /* unused */
320 } , {
321 /* unused */
322 } , {
323 /* unused */
324 } , {
325 /* unused */
326 },
327 };
328 /* can't use #7 and #8 for line active and pixel active counters */
329 struct di_sync_config cfg_vga[] = {
330 {
331 /* 1: INT_HSYNC */
332 .run_count = h_total - 1,
333 .run_src = DI_SYNC_CLK,
334 } , {
335 /* 2: VSYNC */
336 .run_count = v_total - 1,
337 .run_src = DI_SYNC_INT_HSYNC,
338 } , {
339 /* 3: Line Active */
340 .run_src = DI_SYNC_INT_HSYNC,
341 .offset_count = sig->mode.vsync_len +
342 sig->mode.vback_porch,
343 .offset_src = DI_SYNC_INT_HSYNC,
344 .repeat_count = sig->mode.vactive,
345 .cnt_clr_src = 3 /* VSYNC */,
346 } , {
347 /* PIN4: HSYNC for VGA via TVEv2 on TQ MBa53 */
348 .run_count = h_total - 1,
349 .run_src = DI_SYNC_CLK,
350 .offset_count = div * sig->v_to_h_sync + 18, /* magic value from Freescale TVE driver */
351 .offset_src = DI_SYNC_CLK,
352 .cnt_polarity_gen_en = 1,
353 .cnt_polarity_trigger_src = DI_SYNC_CLK,
354 .cnt_down = sig->mode.hsync_len * 2,
355 } , {
356 /* 5: Pixel Active signal to DC */
357 .run_src = DI_SYNC_CLK,
358 .offset_count = sig->mode.hsync_len +
359 sig->mode.hback_porch,
360 .offset_src = DI_SYNC_CLK,
361 .repeat_count = sig->mode.hactive,
362 .cnt_clr_src = 4, /* Line Active */
363 } , {
364 /* PIN6: VSYNC for VGA via TVEv2 on TQ MBa53 */
365 .run_count = v_total - 1,
366 .run_src = DI_SYNC_INT_HSYNC,
367 .offset_count = 1, /* magic value from Freescale TVE driver */
368 .offset_src = DI_SYNC_INT_HSYNC,
369 .cnt_polarity_gen_en = 1,
370 .cnt_polarity_trigger_src = DI_SYNC_INT_HSYNC,
371 .cnt_down = sig->mode.vsync_len * 2,
372 } , {
373 /* PIN4: HSYNC for VGA via TVEv2 on i.MX53-QSB */
374 .run_count = h_total - 1,
375 .run_src = DI_SYNC_CLK,
376 .offset_count = div * sig->v_to_h_sync + 18, /* magic value from Freescale TVE driver */
377 .offset_src = DI_SYNC_CLK,
378 .cnt_polarity_gen_en = 1,
379 .cnt_polarity_trigger_src = DI_SYNC_CLK,
380 .cnt_down = sig->mode.hsync_len * 2,
381 } , {
382 /* PIN6: VSYNC for VGA via TVEv2 on i.MX53-QSB */
383 .run_count = v_total - 1,
384 .run_src = DI_SYNC_INT_HSYNC,
385 .offset_count = 1, /* magic value from Freescale TVE driver */
386 .offset_src = DI_SYNC_INT_HSYNC,
387 .cnt_polarity_gen_en = 1,
388 .cnt_polarity_trigger_src = DI_SYNC_INT_HSYNC,
389 .cnt_down = sig->mode.vsync_len * 2,
390 } , {
391 /* unused */
392 },
393 };
394
395 ipu_di_write(di, v_total - 1, DI_SCR_CONF);
396 if (sig->hsync_pin == 2 && sig->vsync_pin == 3)
397 ipu_di_sync_config(di, cfg, 0, ARRAY_SIZE(cfg));
398 else
399 ipu_di_sync_config(di, cfg_vga, 0, ARRAY_SIZE(cfg_vga));
400 }
401
402 static void ipu_di_config_clock(struct ipu_di *di,
403 const struct ipu_di_signal_cfg *sig)
404 {
405 struct clk *clk;
406 unsigned clkgen0;
407 uint32_t val;
408
409 if (sig->clkflags & IPU_DI_CLKMODE_EXT) {
410 /*
411 * CLKMODE_EXT means we must use the DI clock: this is
412 * needed for things like LVDS which needs to feed the
413 * DI and LDB with the same pixel clock.
414 */
415 clk = di->clk_di;
416
417 if (sig->clkflags & IPU_DI_CLKMODE_SYNC) {
418 /*
419 * CLKMODE_SYNC means that we want the DI to be
420 * clocked at the same rate as the parent clock.
421 * This is needed (eg) for LDB which needs to be
422 * fed with the same pixel clock. We assume that
423 * the LDB clock has already been set correctly.
424 */
425 clkgen0 = 1 << 4;
426 } else {
427 /*
428 * We can use the divider. We should really have
429 * a flag here indicating whether the bridge can
430 * cope with a fractional divider or not. For the
431 * time being, let's go for simplicitly and
432 * reliability.
433 */
434 unsigned long in_rate;
435 unsigned div;
436
437 clk_set_rate(clk, sig->mode.pixelclock);
438
439 in_rate = clk_get_rate(clk);
440 div = DIV_ROUND_CLOSEST(in_rate, sig->mode.pixelclock);
441 div = clamp(div, 1U, 255U);
442
443 clkgen0 = div << 4;
444 }
445 } else {
446 /*
447 * For other interfaces, we can arbitarily select between
448 * the DI specific clock and the internal IPU clock. See
449 * DI_GENERAL bit 20. We select the IPU clock if it can
450 * give us a clock rate within 1% of the requested frequency,
451 * otherwise we use the DI clock.
452 */
453 unsigned long rate, clkrate;
454 unsigned div, error;
455
456 clkrate = clk_get_rate(di->clk_ipu);
457 div = DIV_ROUND_CLOSEST(clkrate, sig->mode.pixelclock);
458 div = clamp(div, 1U, 255U);
459 rate = clkrate / div;
460
461 error = rate / (sig->mode.pixelclock / 1000);
462
463 dev_dbg(di->ipu->dev, " IPU clock can give %lu with divider %u, error %d.%u%%\n",
464 rate, div, (signed)(error - 1000) / 10, error % 10);
465
466 /* Allow a 1% error */
467 if (error < 1010 && error >= 990) {
468 clk = di->clk_ipu;
469
470 clkgen0 = div << 4;
471 } else {
472 unsigned long in_rate;
473 unsigned div;
474
475 clk = di->clk_di;
476
477 clk_set_rate(clk, sig->mode.pixelclock);
478
479 in_rate = clk_get_rate(clk);
480 div = DIV_ROUND_CLOSEST(in_rate, sig->mode.pixelclock);
481 div = clamp(div, 1U, 255U);
482
483 clkgen0 = div << 4;
484 }
485 }
486
487 di->clk_di_pixel = clk;
488
489 /* Set the divider */
490 ipu_di_write(di, clkgen0, DI_BS_CLKGEN0);
491
492 /*
493 * Set the high/low periods. Bits 24:16 give us the falling edge,
494 * and bits 8:0 give the rising edge. LSB is fraction, and is
495 * based on the divider above. We want a 50% duty cycle, so set
496 * the falling edge to be half the divider.
497 */
498 ipu_di_write(di, (clkgen0 >> 4) << 16, DI_BS_CLKGEN1);
499
500 /* Finally select the input clock */
501 val = ipu_di_read(di, DI_GENERAL) & ~DI_GEN_DI_CLK_EXT;
502 if (clk == di->clk_di)
503 val |= DI_GEN_DI_CLK_EXT;
504 ipu_di_write(di, val, DI_GENERAL);
505
506 dev_dbg(di->ipu->dev, "Want %luHz IPU %luHz DI %luHz using %s, %luHz\n",
507 sig->mode.pixelclock,
508 clk_get_rate(di->clk_ipu),
509 clk_get_rate(di->clk_di),
510 clk == di->clk_di ? "DI" : "IPU",
511 clk_get_rate(di->clk_di_pixel) / (clkgen0 >> 4));
512 }
513
514 /*
515 * This function is called to adjust a video mode to IPU restrictions.
516 * It is meant to be called from drm crtc mode_fixup() methods.
517 */
518 int ipu_di_adjust_videomode(struct ipu_di *di, struct videomode *mode)
519 {
520 u32 diff;
521
522 if (mode->vfront_porch >= 2)
523 return 0;
524
525 diff = 2 - mode->vfront_porch;
526
527 if (mode->vback_porch >= diff) {
528 mode->vfront_porch = 2;
529 mode->vback_porch -= diff;
530 } else if (mode->vsync_len > diff) {
531 mode->vfront_porch = 2;
532 mode->vsync_len = mode->vsync_len - diff;
533 } else {
534 dev_warn(di->ipu->dev, "failed to adjust videomode\n");
535 return -EINVAL;
536 }
537
538 dev_dbg(di->ipu->dev, "videomode adapted for IPU restrictions\n");
539 return 0;
540 }
541 EXPORT_SYMBOL_GPL(ipu_di_adjust_videomode);
542
543 static u32 ipu_di_gen_polarity(int pin)
544 {
545 switch (pin) {
546 case 1:
547 return DI_GEN_POLARITY_1;
548 case 2:
549 return DI_GEN_POLARITY_2;
550 case 3:
551 return DI_GEN_POLARITY_3;
552 case 4:
553 return DI_GEN_POLARITY_4;
554 case 5:
555 return DI_GEN_POLARITY_5;
556 case 6:
557 return DI_GEN_POLARITY_6;
558 case 7:
559 return DI_GEN_POLARITY_7;
560 case 8:
561 return DI_GEN_POLARITY_8;
562 }
563 return 0;
564 }
565
566 int ipu_di_init_sync_panel(struct ipu_di *di, struct ipu_di_signal_cfg *sig)
567 {
568 u32 reg;
569 u32 di_gen, vsync_cnt;
570 u32 div;
571
572 dev_dbg(di->ipu->dev, "disp %d: panel size = %d x %d\n",
573 di->id, sig->mode.hactive, sig->mode.vactive);
574
575 dev_dbg(di->ipu->dev, "Clocks: IPU %luHz DI %luHz Needed %luHz\n",
576 clk_get_rate(di->clk_ipu),
577 clk_get_rate(di->clk_di),
578 sig->mode.pixelclock);
579
580 mutex_lock(&di_mutex);
581
582 ipu_di_config_clock(di, sig);
583
584 div = ipu_di_read(di, DI_BS_CLKGEN0) & 0xfff;
585 div = div / 16; /* Now divider is integer portion */
586
587 /* Setup pixel clock timing */
588 /* Down time is half of period */
589 ipu_di_write(di, (div << 16), DI_BS_CLKGEN1);
590
591 ipu_di_data_wave_config(di, SYNC_WAVE, div - 1, div - 1);
592 ipu_di_data_pin_config(di, SYNC_WAVE, DI_PIN15, 3, 0, div * 2);
593
594 di_gen = ipu_di_read(di, DI_GENERAL) & DI_GEN_DI_CLK_EXT;
595 di_gen |= DI_GEN_DI_VSYNC_EXT;
596
597 if (sig->mode.flags & DISPLAY_FLAGS_INTERLACED) {
598 ipu_di_sync_config_interlaced(di, sig);
599
600 /* set y_sel = 1 */
601 di_gen |= 0x10000000;
602
603 vsync_cnt = 3;
604 } else {
605 ipu_di_sync_config_noninterlaced(di, sig, div);
606
607 vsync_cnt = 3;
608 if (di->id == 1)
609 /*
610 * TODO: change only for TVEv2, parallel display
611 * uses pin 2 / 3
612 */
613 if (!(sig->hsync_pin == 2 && sig->vsync_pin == 3))
614 vsync_cnt = 6;
615 }
616
617 if (sig->mode.flags & DISPLAY_FLAGS_HSYNC_HIGH)
618 di_gen |= ipu_di_gen_polarity(sig->hsync_pin);
619 if (sig->mode.flags & DISPLAY_FLAGS_VSYNC_HIGH)
620 di_gen |= ipu_di_gen_polarity(sig->vsync_pin);
621
622 if (sig->clk_pol)
623 di_gen |= DI_GEN_POLARITY_DISP_CLK;
624
625 ipu_di_write(di, di_gen, DI_GENERAL);
626
627 ipu_di_write(di, (--vsync_cnt << DI_VSYNC_SEL_OFFSET) | 0x00000002,
628 DI_SYNC_AS_GEN);
629
630 reg = ipu_di_read(di, DI_POL);
631 reg &= ~(DI_POL_DRDY_DATA_POLARITY | DI_POL_DRDY_POLARITY_15);
632
633 if (sig->enable_pol)
634 reg |= DI_POL_DRDY_POLARITY_15;
635 if (sig->data_pol)
636 reg |= DI_POL_DRDY_DATA_POLARITY;
637
638 ipu_di_write(di, reg, DI_POL);
639
640 mutex_unlock(&di_mutex);
641
642 return 0;
643 }
644 EXPORT_SYMBOL_GPL(ipu_di_init_sync_panel);
645
646 int ipu_di_enable(struct ipu_di *di)
647 {
648 int ret;
649
650 WARN_ON(IS_ERR(di->clk_di_pixel));
651
652 ret = clk_prepare_enable(di->clk_di_pixel);
653 if (ret)
654 return ret;
655
656 ipu_module_enable(di->ipu, di->module);
657
658 return 0;
659 }
660 EXPORT_SYMBOL_GPL(ipu_di_enable);
661
662 int ipu_di_disable(struct ipu_di *di)
663 {
664 WARN_ON(IS_ERR(di->clk_di_pixel));
665
666 ipu_module_disable(di->ipu, di->module);
667
668 clk_disable_unprepare(di->clk_di_pixel);
669
670 return 0;
671 }
672 EXPORT_SYMBOL_GPL(ipu_di_disable);
673
674 int ipu_di_get_num(struct ipu_di *di)
675 {
676 return di->id;
677 }
678 EXPORT_SYMBOL_GPL(ipu_di_get_num);
679
680 static DEFINE_MUTEX(ipu_di_lock);
681
682 struct ipu_di *ipu_di_get(struct ipu_soc *ipu, int disp)
683 {
684 struct ipu_di *di;
685
686 if (disp > 1)
687 return ERR_PTR(-EINVAL);
688
689 di = ipu->di_priv[disp];
690
691 mutex_lock(&ipu_di_lock);
692
693 if (di->inuse) {
694 di = ERR_PTR(-EBUSY);
695 goto out;
696 }
697
698 di->inuse = true;
699 out:
700 mutex_unlock(&ipu_di_lock);
701
702 return di;
703 }
704 EXPORT_SYMBOL_GPL(ipu_di_get);
705
706 void ipu_di_put(struct ipu_di *di)
707 {
708 mutex_lock(&ipu_di_lock);
709
710 di->inuse = false;
711
712 mutex_unlock(&ipu_di_lock);
713 }
714 EXPORT_SYMBOL_GPL(ipu_di_put);
715
716 int ipu_di_init(struct ipu_soc *ipu, struct device *dev, int id,
717 unsigned long base,
718 u32 module, struct clk *clk_ipu)
719 {
720 struct ipu_di *di;
721
722 if (id > 1)
723 return -ENODEV;
724
725 di = devm_kzalloc(dev, sizeof(*di), GFP_KERNEL);
726 if (!di)
727 return -ENOMEM;
728
729 ipu->di_priv[id] = di;
730
731 di->clk_di = devm_clk_get(dev, id ? "di1" : "di0");
732 if (IS_ERR(di->clk_di))
733 return PTR_ERR(di->clk_di);
734
735 di->module = module;
736 di->id = id;
737 di->clk_ipu = clk_ipu;
738 di->base = devm_ioremap(dev, base, PAGE_SIZE);
739 if (!di->base)
740 return -ENOMEM;
741
742 ipu_di_write(di, 0x10, DI_BS_CLKGEN0);
743
744 dev_dbg(dev, "DI%d base: 0x%08lx remapped to %p\n",
745 id, base, di->base);
746 di->inuse = false;
747 di->ipu = ipu;
748
749 return 0;
750 }
751
752 void ipu_di_exit(struct ipu_soc *ipu, int id)
753 {
754 }
Linux with added FPC-III support