2 * Copyright (c) 2010 Sascha Hauer <s.hauer@pengutronix.de>
3 * Copyright (C) 2005-2009 Freescale Semiconductor, Inc.
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.
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
15 #include <linux/export.h>
16 #include <linux/module.h>
17 #include <linux/types.h>
18 #include <linux/errno.h>
20 #include <linux/err.h>
21 #include <linux/platform_device.h>
23 #include <video/imx-ipu-v3.h>
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 */
37 static DEFINE_MUTEX(di_mutex);
39 struct di_sync_config {
46 int cnt_polarity_gen_en;
47 int cnt_polarity_clr_src;
48 int cnt_polarity_trigger_src;
70 DI_SYNC_INT_HSYNC = 2,
78 #define DI_GENERAL 0x0000
79 #define DI_BS_CLKGEN0 0x0004
80 #define DI_BS_CLKGEN1 0x0008
81 #define DI_SW_GEN0(gen) (0x000c + 4 * ((gen) - 1))
82 #define DI_SW_GEN1(gen) (0x0030 + 4 * ((gen) - 1))
83 #define DI_STP_REP(gen) (0x0148 + 4 * (((gen) - 1)/2))
84 #define DI_SYNC_AS_GEN 0x0054
85 #define DI_DW_GEN(gen) (0x0058 + 4 * (gen))
86 #define DI_DW_SET(gen, set) (0x0088 + 4 * ((gen) + 0xc * (set)))
87 #define DI_SER_CONF 0x015c
92 #define DI_SCR_CONF 0x0170
93 #define DI_STAT 0x0174
95 #define DI_SW_GEN0_RUN_COUNT(x) ((x) << 19)
96 #define DI_SW_GEN0_RUN_SRC(x) ((x) << 16)
97 #define DI_SW_GEN0_OFFSET_COUNT(x) ((x) << 3)
98 #define DI_SW_GEN0_OFFSET_SRC(x) ((x) << 0)
100 #define DI_SW_GEN1_CNT_POL_GEN_EN(x) ((x) << 29)
101 #define DI_SW_GEN1_CNT_CLR_SRC(x) ((x) << 25)
102 #define DI_SW_GEN1_CNT_POL_TRIGGER_SRC(x) ((x) << 12)
103 #define DI_SW_GEN1_CNT_POL_CLR_SRC(x) ((x) << 9)
104 #define DI_SW_GEN1_CNT_DOWN(x) ((x) << 16)
105 #define DI_SW_GEN1_CNT_UP(x) (x)
106 #define DI_SW_GEN1_AUTO_RELOAD (0x10000000)
108 #define DI_DW_GEN_ACCESS_SIZE_OFFSET 24
109 #define DI_DW_GEN_COMPONENT_SIZE_OFFSET 16
111 #define DI_GEN_POLARITY_1 (1 << 0)
112 #define DI_GEN_POLARITY_2 (1 << 1)
113 #define DI_GEN_POLARITY_3 (1 << 2)
114 #define DI_GEN_POLARITY_4 (1 << 3)
115 #define DI_GEN_POLARITY_5 (1 << 4)
116 #define DI_GEN_POLARITY_6 (1 << 5)
117 #define DI_GEN_POLARITY_7 (1 << 6)
118 #define DI_GEN_POLARITY_8 (1 << 7)
119 #define DI_GEN_POLARITY_DISP_CLK (1 << 17)
120 #define DI_GEN_DI_CLK_EXT (1 << 20)
121 #define DI_GEN_DI_VSYNC_EXT (1 << 21)
123 #define DI_POL_DRDY_DATA_POLARITY (1 << 7)
124 #define DI_POL_DRDY_POLARITY_15 (1 << 4)
126 #define DI_VSYNC_SEL_OFFSET 13
128 static inline u32 ipu_di_read(struct ipu_di *di, unsigned offset)
130 return readl(di->base + offset);
133 static inline void ipu_di_write(struct ipu_di *di, u32 value, unsigned offset)
135 writel(value, di->base + offset);
138 static void ipu_di_data_wave_config(struct ipu_di *di,
140 int access_size, int component_size)
143 reg = (access_size << DI_DW_GEN_ACCESS_SIZE_OFFSET) |
144 (component_size << DI_DW_GEN_COMPONENT_SIZE_OFFSET);
145 ipu_di_write(di, reg, DI_DW_GEN(wave_gen));
148 static void ipu_di_data_pin_config(struct ipu_di *di, int wave_gen, int di_pin,
149 int set, int up, int down)
153 reg = ipu_di_read(di, DI_DW_GEN(wave_gen));
154 reg &= ~(0x3 << (di_pin * 2));
155 reg |= set << (di_pin * 2);
156 ipu_di_write(di, reg, DI_DW_GEN(wave_gen));
158 ipu_di_write(di, (down << 16) | up, DI_DW_SET(wave_gen, set));
161 static void ipu_di_sync_config(struct ipu_di *di, struct di_sync_config *config,
162 int start, int count)
167 for (i = 0; i < count; i++) {
168 struct di_sync_config *c = &config[i];
169 int wave_gen = start + i + 1;
171 if ((c->run_count >= 0x1000) || (c->offset_count >= 0x1000) ||
172 (c->repeat_count >= 0x1000) ||
173 (c->cnt_up >= 0x400) ||
174 (c->cnt_down >= 0x400)) {
175 dev_err(di->ipu->dev, "DI%d counters out of range.\n",
180 reg = DI_SW_GEN0_RUN_COUNT(c->run_count) |
181 DI_SW_GEN0_RUN_SRC(c->run_src) |
182 DI_SW_GEN0_OFFSET_COUNT(c->offset_count) |
183 DI_SW_GEN0_OFFSET_SRC(c->offset_src);
184 ipu_di_write(di, reg, DI_SW_GEN0(wave_gen));
186 reg = DI_SW_GEN1_CNT_POL_GEN_EN(c->cnt_polarity_gen_en) |
187 DI_SW_GEN1_CNT_CLR_SRC(c->cnt_clr_src) |
188 DI_SW_GEN1_CNT_POL_TRIGGER_SRC(
189 c->cnt_polarity_trigger_src) |
190 DI_SW_GEN1_CNT_POL_CLR_SRC(c->cnt_polarity_clr_src) |
191 DI_SW_GEN1_CNT_DOWN(c->cnt_down) |
192 DI_SW_GEN1_CNT_UP(c->cnt_up);
194 /* Enable auto reload */
195 if (c->repeat_count == 0)
196 reg |= DI_SW_GEN1_AUTO_RELOAD;
198 ipu_di_write(di, reg, DI_SW_GEN1(wave_gen));
200 reg = ipu_di_read(di, DI_STP_REP(wave_gen));
201 reg &= ~(0xffff << (16 * ((wave_gen - 1) & 0x1)));
202 reg |= c->repeat_count << (16 * ((wave_gen - 1) & 0x1));
203 ipu_di_write(di, reg, DI_STP_REP(wave_gen));
207 static void ipu_di_sync_config_interlaced(struct ipu_di *di,
208 struct ipu_di_signal_cfg *sig)
210 u32 h_total = sig->width + sig->h_sync_width +
211 sig->h_start_width + sig->h_end_width;
212 u32 v_total = sig->height + sig->v_sync_width +
213 sig->v_start_width + sig->v_end_width;
215 struct di_sync_config cfg[] = {
217 .run_count = h_total / 2 - 1,
218 .run_src = DI_SYNC_CLK,
220 .run_count = h_total - 11,
221 .run_src = DI_SYNC_CLK,
224 .run_count = v_total * 2 - 1,
225 .run_src = DI_SYNC_INT_HSYNC,
227 .offset_src = DI_SYNC_INT_HSYNC,
230 .run_count = v_total / 2 - 1,
231 .run_src = DI_SYNC_HSYNC,
232 .offset_count = sig->v_start_width,
233 .offset_src = DI_SYNC_HSYNC,
235 .cnt_clr_src = DI_SYNC_VSYNC,
237 .run_src = DI_SYNC_HSYNC,
238 .repeat_count = sig->height / 2,
241 .run_count = v_total - 1,
242 .run_src = DI_SYNC_HSYNC,
244 .run_count = v_total / 2 - 1,
245 .run_src = DI_SYNC_HSYNC,
247 .offset_src = DI_SYNC_HSYNC,
249 .cnt_clr_src = DI_SYNC_VSYNC,
251 .run_src = DI_SYNC_CLK,
252 .offset_count = sig->h_start_width,
253 .offset_src = DI_SYNC_CLK,
254 .repeat_count = sig->width,
257 .run_count = v_total - 1,
258 .run_src = DI_SYNC_INT_HSYNC,
259 .offset_count = v_total / 2,
260 .offset_src = DI_SYNC_INT_HSYNC,
261 .cnt_clr_src = DI_SYNC_HSYNC,
266 ipu_di_sync_config(di, cfg, 0, ARRAY_SIZE(cfg));
268 /* set gentime select and tag sel */
269 reg = ipu_di_read(di, DI_SW_GEN1(9));
271 reg |= (3 - 1) << 29 | 0x00008000;
272 ipu_di_write(di, reg, DI_SW_GEN1(9));
274 ipu_di_write(di, v_total / 2 - 1, DI_SCR_CONF);
277 static void ipu_di_sync_config_noninterlaced(struct ipu_di *di,
278 struct ipu_di_signal_cfg *sig, int div)
280 u32 h_total = sig->width + sig->h_sync_width + sig->h_start_width +
282 u32 v_total = sig->height + sig->v_sync_width + sig->v_start_width +
284 struct di_sync_config cfg[] = {
287 .run_count = h_total - 1,
288 .run_src = DI_SYNC_CLK,
291 .run_count = h_total - 1,
292 .run_src = DI_SYNC_CLK,
293 .offset_count = div * sig->v_to_h_sync,
294 .offset_src = DI_SYNC_CLK,
295 .cnt_polarity_gen_en = 1,
296 .cnt_polarity_trigger_src = DI_SYNC_CLK,
297 .cnt_down = sig->h_sync_width * 2,
300 .run_count = v_total - 1,
301 .run_src = DI_SYNC_INT_HSYNC,
302 .cnt_polarity_gen_en = 1,
303 .cnt_polarity_trigger_src = DI_SYNC_INT_HSYNC,
304 .cnt_down = sig->v_sync_width * 2,
307 .run_src = DI_SYNC_HSYNC,
308 .offset_count = sig->v_sync_width + sig->v_start_width,
309 .offset_src = DI_SYNC_HSYNC,
310 .repeat_count = sig->height,
311 .cnt_clr_src = DI_SYNC_VSYNC,
313 /* 5: Pixel Active, referenced by DC */
314 .run_src = DI_SYNC_CLK,
315 .offset_count = sig->h_sync_width + sig->h_start_width,
316 .offset_src = DI_SYNC_CLK,
317 .repeat_count = sig->width,
318 .cnt_clr_src = 5, /* Line Active */
329 /* can't use #7 and #8 for line active and pixel active counters */
330 struct di_sync_config cfg_vga[] = {
333 .run_count = h_total - 1,
334 .run_src = DI_SYNC_CLK,
337 .run_count = v_total - 1,
338 .run_src = DI_SYNC_INT_HSYNC,
341 .run_src = DI_SYNC_INT_HSYNC,
342 .offset_count = sig->v_sync_width + sig->v_start_width,
343 .offset_src = DI_SYNC_INT_HSYNC,
344 .repeat_count = sig->height,
345 .cnt_clr_src = 3 /* VSYNC */,
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->h_sync_width * 2,
356 /* 5: Pixel Active signal to DC */
357 .run_src = DI_SYNC_CLK,
358 .offset_count = sig->h_sync_width + sig->h_start_width,
359 .offset_src = DI_SYNC_CLK,
360 .repeat_count = sig->width,
361 .cnt_clr_src = 4, /* Line Active */
363 /* PIN6: VSYNC for VGA via TVEv2 on TQ MBa53 */
364 .run_count = v_total - 1,
365 .run_src = DI_SYNC_INT_HSYNC,
366 .offset_count = 1, /* magic value from Freescale TVE driver */
367 .offset_src = DI_SYNC_INT_HSYNC,
368 .cnt_polarity_gen_en = 1,
369 .cnt_polarity_trigger_src = DI_SYNC_INT_HSYNC,
370 .cnt_down = sig->v_sync_width * 2,
372 /* PIN4: HSYNC for VGA via TVEv2 on i.MX53-QSB */
373 .run_count = h_total - 1,
374 .run_src = DI_SYNC_CLK,
375 .offset_count = div * sig->v_to_h_sync + 18, /* magic value from Freescale TVE driver */
376 .offset_src = DI_SYNC_CLK,
377 .cnt_polarity_gen_en = 1,
378 .cnt_polarity_trigger_src = DI_SYNC_CLK,
379 .cnt_down = sig->h_sync_width * 2,
381 /* PIN6: VSYNC for VGA via TVEv2 on i.MX53-QSB */
382 .run_count = v_total - 1,
383 .run_src = DI_SYNC_INT_HSYNC,
384 .offset_count = 1, /* magic value from Freescale TVE driver */
385 .offset_src = DI_SYNC_INT_HSYNC,
386 .cnt_polarity_gen_en = 1,
387 .cnt_polarity_trigger_src = DI_SYNC_INT_HSYNC,
388 .cnt_down = sig->v_sync_width * 2,
394 ipu_di_write(di, v_total - 1, DI_SCR_CONF);
395 if (sig->hsync_pin == 2 && sig->vsync_pin == 3)
396 ipu_di_sync_config(di, cfg, 0, ARRAY_SIZE(cfg));
398 ipu_di_sync_config(di, cfg_vga, 0, ARRAY_SIZE(cfg_vga));
401 static void ipu_di_config_clock(struct ipu_di *di,
402 const struct ipu_di_signal_cfg *sig)
408 if (sig->clkflags & IPU_DI_CLKMODE_EXT) {
410 * CLKMODE_EXT means we must use the DI clock: this is
411 * needed for things like LVDS which needs to feed the
412 * DI and LDB with the same pixel clock.
416 if (sig->clkflags & IPU_DI_CLKMODE_SYNC) {
418 * CLKMODE_SYNC means that we want the DI to be
419 * clocked at the same rate as the parent clock.
420 * This is needed (eg) for LDB which needs to be
421 * fed with the same pixel clock. We assume that
422 * the LDB clock has already been set correctly.
427 * We can use the divider. We should really have
428 * a flag here indicating whether the bridge can
429 * cope with a fractional divider or not. For the
430 * time being, let's go for simplicitly and
433 unsigned long in_rate;
436 clk_set_rate(clk, sig->pixelclock);
438 in_rate = clk_get_rate(clk);
439 div = (in_rate + sig->pixelclock / 2) / sig->pixelclock;
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.
453 unsigned long rate, clkrate;
456 clkrate = clk_get_rate(di->clk_ipu);
457 div = (clkrate + sig->pixelclock / 2) / sig->pixelclock;
458 rate = clkrate / div;
460 error = rate / (sig->pixelclock / 1000);
462 dev_dbg(di->ipu->dev, " IPU clock can give %lu with divider %u, error %d.%u%%\n",
463 rate, div, (signed)(error - 1000) / 10, error % 10);
465 /* Allow a 1% error */
466 if (error < 1010 && error >= 990) {
471 unsigned long in_rate;
476 clk_set_rate(clk, sig->pixelclock);
478 in_rate = clk_get_rate(clk);
479 div = (in_rate + sig->pixelclock / 2) / sig->pixelclock;
487 di->clk_di_pixel = clk;
489 /* Set the divider */
490 ipu_di_write(di, clkgen0, DI_BS_CLKGEN0);
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.
498 ipu_di_write(di, (clkgen0 >> 4) << 16, DI_BS_CLKGEN1);
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);
506 dev_dbg(di->ipu->dev, "Want %luHz IPU %luHz DI %luHz using %s, %luHz\n",
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));
514 int ipu_di_init_sync_panel(struct ipu_di *di, struct ipu_di_signal_cfg *sig)
517 u32 di_gen, vsync_cnt;
519 u32 h_total, v_total;
521 dev_dbg(di->ipu->dev, "disp %d: panel size = %d x %d\n",
522 di->id, sig->width, sig->height);
524 if ((sig->v_sync_width == 0) || (sig->h_sync_width == 0))
527 h_total = sig->width + sig->h_sync_width + sig->h_start_width +
529 v_total = sig->height + sig->v_sync_width + sig->v_start_width +
532 dev_dbg(di->ipu->dev, "Clocks: IPU %luHz DI %luHz Needed %luHz\n",
533 clk_get_rate(di->clk_ipu),
534 clk_get_rate(di->clk_di),
537 mutex_lock(&di_mutex);
539 ipu_di_config_clock(di, sig);
541 div = ipu_di_read(di, DI_BS_CLKGEN0) & 0xfff;
542 div = div / 16; /* Now divider is integer portion */
544 /* Setup pixel clock timing */
545 /* Down time is half of period */
546 ipu_di_write(di, (div << 16), DI_BS_CLKGEN1);
548 ipu_di_data_wave_config(di, SYNC_WAVE, div - 1, div - 1);
549 ipu_di_data_pin_config(di, SYNC_WAVE, DI_PIN15, 3, 0, div * 2);
551 di_gen = ipu_di_read(di, DI_GENERAL) & DI_GEN_DI_CLK_EXT;
552 di_gen |= DI_GEN_DI_VSYNC_EXT;
554 if (sig->interlaced) {
555 ipu_di_sync_config_interlaced(di, sig);
558 di_gen |= 0x10000000;
559 di_gen |= DI_GEN_POLARITY_5;
560 di_gen |= DI_GEN_POLARITY_8;
565 di_gen |= DI_GEN_POLARITY_3;
567 di_gen |= DI_GEN_POLARITY_2;
569 ipu_di_sync_config_noninterlaced(di, sig, div);
574 * TODO: change only for TVEv2, parallel display
577 if (!(sig->hsync_pin == 2 && sig->vsync_pin == 3))
580 if (sig->Hsync_pol) {
581 if (sig->hsync_pin == 2)
582 di_gen |= DI_GEN_POLARITY_2;
583 else if (sig->hsync_pin == 4)
584 di_gen |= DI_GEN_POLARITY_4;
585 else if (sig->hsync_pin == 7)
586 di_gen |= DI_GEN_POLARITY_7;
588 if (sig->Vsync_pol) {
589 if (sig->vsync_pin == 3)
590 di_gen |= DI_GEN_POLARITY_3;
591 else if (sig->vsync_pin == 6)
592 di_gen |= DI_GEN_POLARITY_6;
593 else if (sig->vsync_pin == 8)
594 di_gen |= DI_GEN_POLARITY_8;
599 di_gen |= DI_GEN_POLARITY_DISP_CLK;
601 ipu_di_write(di, di_gen, DI_GENERAL);
603 ipu_di_write(di, (--vsync_cnt << DI_VSYNC_SEL_OFFSET) | 0x00000002,
606 reg = ipu_di_read(di, DI_POL);
607 reg &= ~(DI_POL_DRDY_DATA_POLARITY | DI_POL_DRDY_POLARITY_15);
610 reg |= DI_POL_DRDY_POLARITY_15;
612 reg |= DI_POL_DRDY_DATA_POLARITY;
614 ipu_di_write(di, reg, DI_POL);
616 mutex_unlock(&di_mutex);
620 EXPORT_SYMBOL_GPL(ipu_di_init_sync_panel);
622 int ipu_di_enable(struct ipu_di *di)
626 WARN_ON(IS_ERR(di->clk_di_pixel));
628 ret = clk_prepare_enable(di->clk_di_pixel);
632 ipu_module_enable(di->ipu, di->module);
636 EXPORT_SYMBOL_GPL(ipu_di_enable);
638 int ipu_di_disable(struct ipu_di *di)
640 WARN_ON(IS_ERR(di->clk_di_pixel));
642 ipu_module_disable(di->ipu, di->module);
644 clk_disable_unprepare(di->clk_di_pixel);
648 EXPORT_SYMBOL_GPL(ipu_di_disable);
650 int ipu_di_get_num(struct ipu_di *di)
654 EXPORT_SYMBOL_GPL(ipu_di_get_num);
656 static DEFINE_MUTEX(ipu_di_lock);
658 struct ipu_di *ipu_di_get(struct ipu_soc *ipu, int disp)
663 return ERR_PTR(-EINVAL);
665 di = ipu->di_priv[disp];
667 mutex_lock(&ipu_di_lock);
670 di = ERR_PTR(-EBUSY);
676 mutex_unlock(&ipu_di_lock);
680 EXPORT_SYMBOL_GPL(ipu_di_get);
682 void ipu_di_put(struct ipu_di *di)
684 mutex_lock(&ipu_di_lock);
688 mutex_unlock(&ipu_di_lock);
690 EXPORT_SYMBOL_GPL(ipu_di_put);
692 int ipu_di_init(struct ipu_soc *ipu, struct device *dev, int id,
694 u32 module, struct clk *clk_ipu)
701 di = devm_kzalloc(dev, sizeof(*di), GFP_KERNEL);
705 ipu->di_priv[id] = di;
707 di->clk_di = devm_clk_get(dev, id ? "di1" : "di0");
708 if (IS_ERR(di->clk_di))
709 return PTR_ERR(di->clk_di);
713 di->clk_ipu = clk_ipu;
714 di->base = devm_ioremap(dev, base, PAGE_SIZE);
718 ipu_di_write(di, 0x10, DI_BS_CLKGEN0);
720 dev_dbg(dev, "DI%d base: 0x%08lx remapped to %p\n",
728 void ipu_di_exit(struct ipu_soc *ipu, int id)