1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * linux/drivers/video/omap2/dss/dispc.c
4  *
5  * Copyright (C) 2009 Nokia Corporation
6  * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
7  *
8  * Some code and ideas taken from drivers/video/omap/ driver
9  * by Imre Deak.
10  */
11 
12 #define DSS_SUBSYS_NAME "DISPC"
13 
14 #include <linux/kernel.h>
15 #include <linux/dma-mapping.h>
16 #include <linux/vmalloc.h>
17 #include <linux/export.h>
18 #include <linux/clk.h>
19 #include <linux/io.h>
20 #include <linux/jiffies.h>
21 #include <linux/seq_file.h>
22 #include <linux/delay.h>
23 #include <linux/workqueue.h>
24 #include <linux/hardirq.h>
25 #include <linux/platform_device.h>
26 #include <linux/pm_runtime.h>
27 #include <linux/sizes.h>
28 #include <linux/mfd/syscon.h>
29 #include <linux/regmap.h>
30 #include <linux/of.h>
31 #include <linux/component.h>
32 
33 #include <video/omapfb_dss.h>
34 
35 #include "dss.h"
36 #include "dss_features.h"
37 #include "dispc.h"
38 
39 /* DISPC */
40 #define DISPC_SZ_REGS			SZ_4K
41 
42 enum omap_burst_size {
43 	BURST_SIZE_X2 = 0,
44 	BURST_SIZE_X4 = 1,
45 	BURST_SIZE_X8 = 2,
46 };
47 
48 #define REG_GET(idx, start, end) \
49 	FLD_GET(dispc_read_reg(idx), start, end)
50 
51 #define REG_FLD_MOD(idx, val, start, end)				\
52 	dispc_write_reg(idx, FLD_MOD(dispc_read_reg(idx), val, start, end))
53 
54 struct dispc_features {
55 	u8 sw_start;
56 	u8 fp_start;
57 	u8 bp_start;
58 	u16 sw_max;
59 	u16 vp_max;
60 	u16 hp_max;
61 	u8 mgr_width_start;
62 	u8 mgr_height_start;
63 	u16 mgr_width_max;
64 	u16 mgr_height_max;
65 	unsigned long max_lcd_pclk;
66 	unsigned long max_tv_pclk;
67 	int (*calc_scaling) (unsigned long pclk, unsigned long lclk,
68 		const struct omap_video_timings *mgr_timings,
69 		u16 width, u16 height, u16 out_width, u16 out_height,
70 		enum omap_color_mode color_mode, bool *five_taps,
71 		int *x_predecim, int *y_predecim, int *decim_x, int *decim_y,
72 		u16 pos_x, unsigned long *core_clk, bool mem_to_mem);
73 	unsigned long (*calc_core_clk) (unsigned long pclk,
74 		u16 width, u16 height, u16 out_width, u16 out_height,
75 		bool mem_to_mem);
76 	u8 num_fifos;
77 
78 	/* swap GFX & WB fifos */
79 	bool gfx_fifo_workaround:1;
80 
81 	/* no DISPC_IRQ_FRAMEDONETV on this SoC */
82 	bool no_framedone_tv:1;
83 
84 	/* revert to the OMAP4 mechanism of DISPC Smart Standby operation */
85 	bool mstandby_workaround:1;
86 
87 	bool set_max_preload:1;
88 
89 	/* PIXEL_INC is not added to the last pixel of a line */
90 	bool last_pixel_inc_missing:1;
91 
92 	/* POL_FREQ has ALIGN bit */
93 	bool supports_sync_align:1;
94 
95 	bool has_writeback:1;
96 };
97 
98 #define DISPC_MAX_NR_FIFOS 5
99 
100 static struct {
101 	struct platform_device *pdev;
102 	void __iomem    *base;
103 
104 	int irq;
105 	irq_handler_t user_handler;
106 	void *user_data;
107 
108 	unsigned long core_clk_rate;
109 	unsigned long tv_pclk_rate;
110 
111 	u32 fifo_size[DISPC_MAX_NR_FIFOS];
112 	/* maps which plane is using a fifo. fifo-id -> plane-id */
113 	int fifo_assignment[DISPC_MAX_NR_FIFOS];
114 
115 	bool		ctx_valid;
116 	u32		ctx[DISPC_SZ_REGS / sizeof(u32)];
117 
118 	const struct dispc_features *feat;
119 
120 	bool is_enabled;
121 
122 	struct regmap *syscon_pol;
123 	u32 syscon_pol_offset;
124 
125 	/* DISPC_CONTROL & DISPC_CONFIG lock*/
126 	spinlock_t control_lock;
127 } dispc;
128 
129 enum omap_color_component {
130 	/* used for all color formats for OMAP3 and earlier
131 	 * and for RGB and Y color component on OMAP4
132 	 */
133 	DISPC_COLOR_COMPONENT_RGB_Y		= 1 << 0,
134 	/* used for UV component for
135 	 * OMAP_DSS_COLOR_YUV2, OMAP_DSS_COLOR_UYVY, OMAP_DSS_COLOR_NV12
136 	 * color formats on OMAP4
137 	 */
138 	DISPC_COLOR_COMPONENT_UV		= 1 << 1,
139 };
140 
141 enum mgr_reg_fields {
142 	DISPC_MGR_FLD_ENABLE,
143 	DISPC_MGR_FLD_STNTFT,
144 	DISPC_MGR_FLD_GO,
145 	DISPC_MGR_FLD_TFTDATALINES,
146 	DISPC_MGR_FLD_STALLMODE,
147 	DISPC_MGR_FLD_TCKENABLE,
148 	DISPC_MGR_FLD_TCKSELECTION,
149 	DISPC_MGR_FLD_CPR,
150 	DISPC_MGR_FLD_FIFOHANDCHECK,
151 	/* used to maintain a count of the above fields */
152 	DISPC_MGR_FLD_NUM,
153 };
154 
155 struct dispc_reg_field {
156 	u16 reg;
157 	u8 high;
158 	u8 low;
159 };
160 
161 static const struct {
162 	const char *name;
163 	u32 vsync_irq;
164 	u32 framedone_irq;
165 	u32 sync_lost_irq;
166 	struct dispc_reg_field reg_desc[DISPC_MGR_FLD_NUM];
167 } mgr_desc[] = {
168 	[OMAP_DSS_CHANNEL_LCD] = {
169 		.name		= "LCD",
170 		.vsync_irq	= DISPC_IRQ_VSYNC,
171 		.framedone_irq	= DISPC_IRQ_FRAMEDONE,
172 		.sync_lost_irq	= DISPC_IRQ_SYNC_LOST,
173 		.reg_desc	= {
174 			[DISPC_MGR_FLD_ENABLE]		= { DISPC_CONTROL,  0,  0 },
175 			[DISPC_MGR_FLD_STNTFT]		= { DISPC_CONTROL,  3,  3 },
176 			[DISPC_MGR_FLD_GO]		= { DISPC_CONTROL,  5,  5 },
177 			[DISPC_MGR_FLD_TFTDATALINES]	= { DISPC_CONTROL,  9,  8 },
178 			[DISPC_MGR_FLD_STALLMODE]	= { DISPC_CONTROL, 11, 11 },
179 			[DISPC_MGR_FLD_TCKENABLE]	= { DISPC_CONFIG,  10, 10 },
180 			[DISPC_MGR_FLD_TCKSELECTION]	= { DISPC_CONFIG,  11, 11 },
181 			[DISPC_MGR_FLD_CPR]		= { DISPC_CONFIG,  15, 15 },
182 			[DISPC_MGR_FLD_FIFOHANDCHECK]	= { DISPC_CONFIG,  16, 16 },
183 		},
184 	},
185 	[OMAP_DSS_CHANNEL_DIGIT] = {
186 		.name		= "DIGIT",
187 		.vsync_irq	= DISPC_IRQ_EVSYNC_ODD | DISPC_IRQ_EVSYNC_EVEN,
188 		.framedone_irq	= DISPC_IRQ_FRAMEDONETV,
189 		.sync_lost_irq	= DISPC_IRQ_SYNC_LOST_DIGIT,
190 		.reg_desc	= {
191 			[DISPC_MGR_FLD_ENABLE]		= { DISPC_CONTROL,  1,  1 },
192 			[DISPC_MGR_FLD_STNTFT]		= { },
193 			[DISPC_MGR_FLD_GO]		= { DISPC_CONTROL,  6,  6 },
194 			[DISPC_MGR_FLD_TFTDATALINES]	= { },
195 			[DISPC_MGR_FLD_STALLMODE]	= { },
196 			[DISPC_MGR_FLD_TCKENABLE]	= { DISPC_CONFIG,  12, 12 },
197 			[DISPC_MGR_FLD_TCKSELECTION]	= { DISPC_CONFIG,  13, 13 },
198 			[DISPC_MGR_FLD_CPR]		= { },
199 			[DISPC_MGR_FLD_FIFOHANDCHECK]	= { DISPC_CONFIG,  16, 16 },
200 		},
201 	},
202 	[OMAP_DSS_CHANNEL_LCD2] = {
203 		.name		= "LCD2",
204 		.vsync_irq	= DISPC_IRQ_VSYNC2,
205 		.framedone_irq	= DISPC_IRQ_FRAMEDONE2,
206 		.sync_lost_irq	= DISPC_IRQ_SYNC_LOST2,
207 		.reg_desc	= {
208 			[DISPC_MGR_FLD_ENABLE]		= { DISPC_CONTROL2,  0,  0 },
209 			[DISPC_MGR_FLD_STNTFT]		= { DISPC_CONTROL2,  3,  3 },
210 			[DISPC_MGR_FLD_GO]		= { DISPC_CONTROL2,  5,  5 },
211 			[DISPC_MGR_FLD_TFTDATALINES]	= { DISPC_CONTROL2,  9,  8 },
212 			[DISPC_MGR_FLD_STALLMODE]	= { DISPC_CONTROL2, 11, 11 },
213 			[DISPC_MGR_FLD_TCKENABLE]	= { DISPC_CONFIG2,  10, 10 },
214 			[DISPC_MGR_FLD_TCKSELECTION]	= { DISPC_CONFIG2,  11, 11 },
215 			[DISPC_MGR_FLD_CPR]		= { DISPC_CONFIG2,  15, 15 },
216 			[DISPC_MGR_FLD_FIFOHANDCHECK]	= { DISPC_CONFIG2,  16, 16 },
217 		},
218 	},
219 	[OMAP_DSS_CHANNEL_LCD3] = {
220 		.name		= "LCD3",
221 		.vsync_irq	= DISPC_IRQ_VSYNC3,
222 		.framedone_irq	= DISPC_IRQ_FRAMEDONE3,
223 		.sync_lost_irq	= DISPC_IRQ_SYNC_LOST3,
224 		.reg_desc	= {
225 			[DISPC_MGR_FLD_ENABLE]		= { DISPC_CONTROL3,  0,  0 },
226 			[DISPC_MGR_FLD_STNTFT]		= { DISPC_CONTROL3,  3,  3 },
227 			[DISPC_MGR_FLD_GO]		= { DISPC_CONTROL3,  5,  5 },
228 			[DISPC_MGR_FLD_TFTDATALINES]	= { DISPC_CONTROL3,  9,  8 },
229 			[DISPC_MGR_FLD_STALLMODE]	= { DISPC_CONTROL3, 11, 11 },
230 			[DISPC_MGR_FLD_TCKENABLE]	= { DISPC_CONFIG3,  10, 10 },
231 			[DISPC_MGR_FLD_TCKSELECTION]	= { DISPC_CONFIG3,  11, 11 },
232 			[DISPC_MGR_FLD_CPR]		= { DISPC_CONFIG3,  15, 15 },
233 			[DISPC_MGR_FLD_FIFOHANDCHECK]	= { DISPC_CONFIG3,  16, 16 },
234 		},
235 	},
236 };
237 
238 struct color_conv_coef {
239 	int ry, rcr, rcb, gy, gcr, gcb, by, bcr, bcb;
240 	int full_range;
241 };
242 
243 static unsigned long dispc_fclk_rate(void);
244 static unsigned long dispc_core_clk_rate(void);
245 static unsigned long dispc_mgr_lclk_rate(enum omap_channel channel);
246 static unsigned long dispc_mgr_pclk_rate(enum omap_channel channel);
247 
248 static unsigned long dispc_plane_pclk_rate(enum omap_plane plane);
249 static unsigned long dispc_plane_lclk_rate(enum omap_plane plane);
250 
251 static inline void dispc_write_reg(const u16 idx, u32 val)
252 {
253 	__raw_writel(val, dispc.base + idx);
254 }
255 
256 static inline u32 dispc_read_reg(const u16 idx)
257 {
258 	return __raw_readl(dispc.base + idx);
259 }
260 
261 static u32 mgr_fld_read(enum omap_channel channel, enum mgr_reg_fields regfld)
262 {
263 	const struct dispc_reg_field rfld = mgr_desc[channel].reg_desc[regfld];
264 	return REG_GET(rfld.reg, rfld.high, rfld.low);
265 }
266 
267 static void mgr_fld_write(enum omap_channel channel,
268 					enum mgr_reg_fields regfld, int val) {
269 	const struct dispc_reg_field rfld = mgr_desc[channel].reg_desc[regfld];
270 	const bool need_lock = rfld.reg == DISPC_CONTROL || rfld.reg == DISPC_CONFIG;
271 	unsigned long flags;
272 
273 	if (need_lock)
274 		spin_lock_irqsave(&dispc.control_lock, flags);
275 
276 	REG_FLD_MOD(rfld.reg, val, rfld.high, rfld.low);
277 
278 	if (need_lock)
279 		spin_unlock_irqrestore(&dispc.control_lock, flags);
280 }
281 
282 #define SR(reg) \
283 	dispc.ctx[DISPC_##reg / sizeof(u32)] = dispc_read_reg(DISPC_##reg)
284 #define RR(reg) \
285 	dispc_write_reg(DISPC_##reg, dispc.ctx[DISPC_##reg / sizeof(u32)])
286 
287 static void dispc_save_context(void)
288 {
289 	int i, j;
290 
291 	DSSDBG("dispc_save_context\n");
292 
293 	SR(IRQENABLE);
294 	SR(CONTROL);
295 	SR(CONFIG);
296 	SR(LINE_NUMBER);
297 	if (dss_has_feature(FEAT_ALPHA_FIXED_ZORDER) ||
298 			dss_has_feature(FEAT_ALPHA_FREE_ZORDER))
299 		SR(GLOBAL_ALPHA);
300 	if (dss_has_feature(FEAT_MGR_LCD2)) {
301 		SR(CONTROL2);
302 		SR(CONFIG2);
303 	}
304 	if (dss_has_feature(FEAT_MGR_LCD3)) {
305 		SR(CONTROL3);
306 		SR(CONFIG3);
307 	}
308 
309 	for (i = 0; i < dss_feat_get_num_mgrs(); i++) {
310 		SR(DEFAULT_COLOR(i));
311 		SR(TRANS_COLOR(i));
312 		SR(SIZE_MGR(i));
313 		if (i == OMAP_DSS_CHANNEL_DIGIT)
314 			continue;
315 		SR(TIMING_H(i));
316 		SR(TIMING_V(i));
317 		SR(POL_FREQ(i));
318 		SR(DIVISORo(i));
319 
320 		SR(DATA_CYCLE1(i));
321 		SR(DATA_CYCLE2(i));
322 		SR(DATA_CYCLE3(i));
323 
324 		if (dss_has_feature(FEAT_CPR)) {
325 			SR(CPR_COEF_R(i));
326 			SR(CPR_COEF_G(i));
327 			SR(CPR_COEF_B(i));
328 		}
329 	}
330 
331 	for (i = 0; i < dss_feat_get_num_ovls(); i++) {
332 		SR(OVL_BA0(i));
333 		SR(OVL_BA1(i));
334 		SR(OVL_POSITION(i));
335 		SR(OVL_SIZE(i));
336 		SR(OVL_ATTRIBUTES(i));
337 		SR(OVL_FIFO_THRESHOLD(i));
338 		SR(OVL_ROW_INC(i));
339 		SR(OVL_PIXEL_INC(i));
340 		if (dss_has_feature(FEAT_PRELOAD))
341 			SR(OVL_PRELOAD(i));
342 		if (i == OMAP_DSS_GFX) {
343 			SR(OVL_WINDOW_SKIP(i));
344 			SR(OVL_TABLE_BA(i));
345 			continue;
346 		}
347 		SR(OVL_FIR(i));
348 		SR(OVL_PICTURE_SIZE(i));
349 		SR(OVL_ACCU0(i));
350 		SR(OVL_ACCU1(i));
351 
352 		for (j = 0; j < 8; j++)
353 			SR(OVL_FIR_COEF_H(i, j));
354 
355 		for (j = 0; j < 8; j++)
356 			SR(OVL_FIR_COEF_HV(i, j));
357 
358 		for (j = 0; j < 5; j++)
359 			SR(OVL_CONV_COEF(i, j));
360 
361 		if (dss_has_feature(FEAT_FIR_COEF_V)) {
362 			for (j = 0; j < 8; j++)
363 				SR(OVL_FIR_COEF_V(i, j));
364 		}
365 
366 		if (dss_has_feature(FEAT_HANDLE_UV_SEPARATE)) {
367 			SR(OVL_BA0_UV(i));
368 			SR(OVL_BA1_UV(i));
369 			SR(OVL_FIR2(i));
370 			SR(OVL_ACCU2_0(i));
371 			SR(OVL_ACCU2_1(i));
372 
373 			for (j = 0; j < 8; j++)
374 				SR(OVL_FIR_COEF_H2(i, j));
375 
376 			for (j = 0; j < 8; j++)
377 				SR(OVL_FIR_COEF_HV2(i, j));
378 
379 			for (j = 0; j < 8; j++)
380 				SR(OVL_FIR_COEF_V2(i, j));
381 		}
382 		if (dss_has_feature(FEAT_ATTR2))
383 			SR(OVL_ATTRIBUTES2(i));
384 	}
385 
386 	if (dss_has_feature(FEAT_CORE_CLK_DIV))
387 		SR(DIVISOR);
388 
389 	dispc.ctx_valid = true;
390 
391 	DSSDBG("context saved\n");
392 }
393 
394 static void dispc_restore_context(void)
395 {
396 	int i, j;
397 
398 	DSSDBG("dispc_restore_context\n");
399 
400 	if (!dispc.ctx_valid)
401 		return;
402 
403 	/*RR(IRQENABLE);*/
404 	/*RR(CONTROL);*/
405 	RR(CONFIG);
406 	RR(LINE_NUMBER);
407 	if (dss_has_feature(FEAT_ALPHA_FIXED_ZORDER) ||
408 			dss_has_feature(FEAT_ALPHA_FREE_ZORDER))
409 		RR(GLOBAL_ALPHA);
410 	if (dss_has_feature(FEAT_MGR_LCD2))
411 		RR(CONFIG2);
412 	if (dss_has_feature(FEAT_MGR_LCD3))
413 		RR(CONFIG3);
414 
415 	for (i = 0; i < dss_feat_get_num_mgrs(); i++) {
416 		RR(DEFAULT_COLOR(i));
417 		RR(TRANS_COLOR(i));
418 		RR(SIZE_MGR(i));
419 		if (i == OMAP_DSS_CHANNEL_DIGIT)
420 			continue;
421 		RR(TIMING_H(i));
422 		RR(TIMING_V(i));
423 		RR(POL_FREQ(i));
424 		RR(DIVISORo(i));
425 
426 		RR(DATA_CYCLE1(i));
427 		RR(DATA_CYCLE2(i));
428 		RR(DATA_CYCLE3(i));
429 
430 		if (dss_has_feature(FEAT_CPR)) {
431 			RR(CPR_COEF_R(i));
432 			RR(CPR_COEF_G(i));
433 			RR(CPR_COEF_B(i));
434 		}
435 	}
436 
437 	for (i = 0; i < dss_feat_get_num_ovls(); i++) {
438 		RR(OVL_BA0(i));
439 		RR(OVL_BA1(i));
440 		RR(OVL_POSITION(i));
441 		RR(OVL_SIZE(i));
442 		RR(OVL_ATTRIBUTES(i));
443 		RR(OVL_FIFO_THRESHOLD(i));
444 		RR(OVL_ROW_INC(i));
445 		RR(OVL_PIXEL_INC(i));
446 		if (dss_has_feature(FEAT_PRELOAD))
447 			RR(OVL_PRELOAD(i));
448 		if (i == OMAP_DSS_GFX) {
449 			RR(OVL_WINDOW_SKIP(i));
450 			RR(OVL_TABLE_BA(i));
451 			continue;
452 		}
453 		RR(OVL_FIR(i));
454 		RR(OVL_PICTURE_SIZE(i));
455 		RR(OVL_ACCU0(i));
456 		RR(OVL_ACCU1(i));
457 
458 		for (j = 0; j < 8; j++)
459 			RR(OVL_FIR_COEF_H(i, j));
460 
461 		for (j = 0; j < 8; j++)
462 			RR(OVL_FIR_COEF_HV(i, j));
463 
464 		for (j = 0; j < 5; j++)
465 			RR(OVL_CONV_COEF(i, j));
466 
467 		if (dss_has_feature(FEAT_FIR_COEF_V)) {
468 			for (j = 0; j < 8; j++)
469 				RR(OVL_FIR_COEF_V(i, j));
470 		}
471 
472 		if (dss_has_feature(FEAT_HANDLE_UV_SEPARATE)) {
473 			RR(OVL_BA0_UV(i));
474 			RR(OVL_BA1_UV(i));
475 			RR(OVL_FIR2(i));
476 			RR(OVL_ACCU2_0(i));
477 			RR(OVL_ACCU2_1(i));
478 
479 			for (j = 0; j < 8; j++)
480 				RR(OVL_FIR_COEF_H2(i, j));
481 
482 			for (j = 0; j < 8; j++)
483 				RR(OVL_FIR_COEF_HV2(i, j));
484 
485 			for (j = 0; j < 8; j++)
486 				RR(OVL_FIR_COEF_V2(i, j));
487 		}
488 		if (dss_has_feature(FEAT_ATTR2))
489 			RR(OVL_ATTRIBUTES2(i));
490 	}
491 
492 	if (dss_has_feature(FEAT_CORE_CLK_DIV))
493 		RR(DIVISOR);
494 
495 	/* enable last, because LCD & DIGIT enable are here */
496 	RR(CONTROL);
497 	if (dss_has_feature(FEAT_MGR_LCD2))
498 		RR(CONTROL2);
499 	if (dss_has_feature(FEAT_MGR_LCD3))
500 		RR(CONTROL3);
501 	/* clear spurious SYNC_LOST_DIGIT interrupts */
502 	dispc_clear_irqstatus(DISPC_IRQ_SYNC_LOST_DIGIT);
503 
504 	/*
505 	 * enable last so IRQs won't trigger before
506 	 * the context is fully restored
507 	 */
508 	RR(IRQENABLE);
509 
510 	DSSDBG("context restored\n");
511 }
512 
513 #undef SR
514 #undef RR
515 
516 int dispc_runtime_get(void)
517 {
518 	int r;
519 
520 	DSSDBG("dispc_runtime_get\n");
521 
522 	r = pm_runtime_resume_and_get(&dispc.pdev->dev);
523 	if (WARN_ON(r < 0))
524 		return r;
525 	return 0;
526 }
527 EXPORT_SYMBOL(dispc_runtime_get);
528 
529 void dispc_runtime_put(void)
530 {
531 	int r;
532 
533 	DSSDBG("dispc_runtime_put\n");
534 
535 	r = pm_runtime_put_sync(&dispc.pdev->dev);
536 	WARN_ON(r < 0 && r != -ENOSYS);
537 }
538 EXPORT_SYMBOL(dispc_runtime_put);
539 
540 u32 dispc_mgr_get_vsync_irq(enum omap_channel channel)
541 {
542 	return mgr_desc[channel].vsync_irq;
543 }
544 EXPORT_SYMBOL(dispc_mgr_get_vsync_irq);
545 
546 u32 dispc_mgr_get_framedone_irq(enum omap_channel channel)
547 {
548 	if (channel == OMAP_DSS_CHANNEL_DIGIT && dispc.feat->no_framedone_tv)
549 		return 0;
550 
551 	return mgr_desc[channel].framedone_irq;
552 }
553 EXPORT_SYMBOL(dispc_mgr_get_framedone_irq);
554 
555 u32 dispc_mgr_get_sync_lost_irq(enum omap_channel channel)
556 {
557 	return mgr_desc[channel].sync_lost_irq;
558 }
559 EXPORT_SYMBOL(dispc_mgr_get_sync_lost_irq);
560 
561 bool dispc_mgr_go_busy(enum omap_channel channel)
562 {
563 	return mgr_fld_read(channel, DISPC_MGR_FLD_GO) == 1;
564 }
565 EXPORT_SYMBOL(dispc_mgr_go_busy);
566 
567 void dispc_mgr_go(enum omap_channel channel)
568 {
569 	WARN_ON(!dispc_mgr_is_enabled(channel));
570 	WARN_ON(dispc_mgr_go_busy(channel));
571 
572 	DSSDBG("GO %s\n", mgr_desc[channel].name);
573 
574 	mgr_fld_write(channel, DISPC_MGR_FLD_GO, 1);
575 }
576 EXPORT_SYMBOL(dispc_mgr_go);
577 
578 static void dispc_ovl_write_firh_reg(enum omap_plane plane, int reg, u32 value)
579 {
580 	dispc_write_reg(DISPC_OVL_FIR_COEF_H(plane, reg), value);
581 }
582 
583 static void dispc_ovl_write_firhv_reg(enum omap_plane plane, int reg, u32 value)
584 {
585 	dispc_write_reg(DISPC_OVL_FIR_COEF_HV(plane, reg), value);
586 }
587 
588 static void dispc_ovl_write_firv_reg(enum omap_plane plane, int reg, u32 value)
589 {
590 	dispc_write_reg(DISPC_OVL_FIR_COEF_V(plane, reg), value);
591 }
592 
593 static void dispc_ovl_write_firh2_reg(enum omap_plane plane, int reg, u32 value)
594 {
595 	BUG_ON(plane == OMAP_DSS_GFX);
596 
597 	dispc_write_reg(DISPC_OVL_FIR_COEF_H2(plane, reg), value);
598 }
599 
600 static void dispc_ovl_write_firhv2_reg(enum omap_plane plane, int reg,
601 		u32 value)
602 {
603 	BUG_ON(plane == OMAP_DSS_GFX);
604 
605 	dispc_write_reg(DISPC_OVL_FIR_COEF_HV2(plane, reg), value);
606 }
607 
608 static void dispc_ovl_write_firv2_reg(enum omap_plane plane, int reg, u32 value)
609 {
610 	BUG_ON(plane == OMAP_DSS_GFX);
611 
612 	dispc_write_reg(DISPC_OVL_FIR_COEF_V2(plane, reg), value);
613 }
614 
615 static void dispc_ovl_set_scale_coef(enum omap_plane plane, int fir_hinc,
616 				int fir_vinc, int five_taps,
617 				enum omap_color_component color_comp)
618 {
619 	const struct dispc_coef *h_coef, *v_coef;
620 	int i;
621 
622 	h_coef = dispc_ovl_get_scale_coef(fir_hinc, true);
623 	v_coef = dispc_ovl_get_scale_coef(fir_vinc, five_taps);
624 
625 	for (i = 0; i < 8; i++) {
626 		u32 h, hv;
627 
628 		h = FLD_VAL(h_coef[i].hc0_vc00, 7, 0)
629 			| FLD_VAL(h_coef[i].hc1_vc0, 15, 8)
630 			| FLD_VAL(h_coef[i].hc2_vc1, 23, 16)
631 			| FLD_VAL(h_coef[i].hc3_vc2, 31, 24);
632 		hv = FLD_VAL(h_coef[i].hc4_vc22, 7, 0)
633 			| FLD_VAL(v_coef[i].hc1_vc0, 15, 8)
634 			| FLD_VAL(v_coef[i].hc2_vc1, 23, 16)
635 			| FLD_VAL(v_coef[i].hc3_vc2, 31, 24);
636 
637 		if (color_comp == DISPC_COLOR_COMPONENT_RGB_Y) {
638 			dispc_ovl_write_firh_reg(plane, i, h);
639 			dispc_ovl_write_firhv_reg(plane, i, hv);
640 		} else {
641 			dispc_ovl_write_firh2_reg(plane, i, h);
642 			dispc_ovl_write_firhv2_reg(plane, i, hv);
643 		}
644 
645 	}
646 
647 	if (five_taps) {
648 		for (i = 0; i < 8; i++) {
649 			u32 v;
650 			v = FLD_VAL(v_coef[i].hc0_vc00, 7, 0)
651 				| FLD_VAL(v_coef[i].hc4_vc22, 15, 8);
652 			if (color_comp == DISPC_COLOR_COMPONENT_RGB_Y)
653 				dispc_ovl_write_firv_reg(plane, i, v);
654 			else
655 				dispc_ovl_write_firv2_reg(plane, i, v);
656 		}
657 	}
658 }
659 
660 
661 static void dispc_ovl_write_color_conv_coef(enum omap_plane plane,
662 		const struct color_conv_coef *ct)
663 {
664 #define CVAL(x, y) (FLD_VAL(x, 26, 16) | FLD_VAL(y, 10, 0))
665 
666 	dispc_write_reg(DISPC_OVL_CONV_COEF(plane, 0), CVAL(ct->rcr, ct->ry));
667 	dispc_write_reg(DISPC_OVL_CONV_COEF(plane, 1), CVAL(ct->gy,  ct->rcb));
668 	dispc_write_reg(DISPC_OVL_CONV_COEF(plane, 2), CVAL(ct->gcb, ct->gcr));
669 	dispc_write_reg(DISPC_OVL_CONV_COEF(plane, 3), CVAL(ct->bcr, ct->by));
670 	dispc_write_reg(DISPC_OVL_CONV_COEF(plane, 4), CVAL(0, ct->bcb));
671 
672 	REG_FLD_MOD(DISPC_OVL_ATTRIBUTES(plane), ct->full_range, 11, 11);
673 
674 #undef CVAL
675 }
676 
677 static void dispc_setup_color_conv_coef(void)
678 {
679 	int i;
680 	int num_ovl = dss_feat_get_num_ovls();
681 	const struct color_conv_coef ctbl_bt601_5_ovl = {
682 		/* YUV -> RGB */
683 		298, 409, 0, 298, -208, -100, 298, 0, 517, 0,
684 	};
685 	const struct color_conv_coef ctbl_bt601_5_wb = {
686 		/* RGB -> YUV */
687 		66, 129, 25, 112, -94, -18, -38, -74, 112, 0,
688 	};
689 
690 	for (i = 1; i < num_ovl; i++)
691 		dispc_ovl_write_color_conv_coef(i, &ctbl_bt601_5_ovl);
692 
693 	if (dispc.feat->has_writeback)
694 		dispc_ovl_write_color_conv_coef(OMAP_DSS_WB, &ctbl_bt601_5_wb);
695 }
696 
697 static void dispc_ovl_set_ba0(enum omap_plane plane, u32 paddr)
698 {
699 	dispc_write_reg(DISPC_OVL_BA0(plane), paddr);
700 }
701 
702 static void dispc_ovl_set_ba1(enum omap_plane plane, u32 paddr)
703 {
704 	dispc_write_reg(DISPC_OVL_BA1(plane), paddr);
705 }
706 
707 static void dispc_ovl_set_ba0_uv(enum omap_plane plane, u32 paddr)
708 {
709 	dispc_write_reg(DISPC_OVL_BA0_UV(plane), paddr);
710 }
711 
712 static void dispc_ovl_set_ba1_uv(enum omap_plane plane, u32 paddr)
713 {
714 	dispc_write_reg(DISPC_OVL_BA1_UV(plane), paddr);
715 }
716 
717 static void dispc_ovl_set_pos(enum omap_plane plane,
718 		enum omap_overlay_caps caps, int x, int y)
719 {
720 	u32 val;
721 
722 	if ((caps & OMAP_DSS_OVL_CAP_POS) == 0)
723 		return;
724 
725 	val = FLD_VAL(y, 26, 16) | FLD_VAL(x, 10, 0);
726 
727 	dispc_write_reg(DISPC_OVL_POSITION(plane), val);
728 }
729 
730 static void dispc_ovl_set_input_size(enum omap_plane plane, int width,
731 		int height)
732 {
733 	u32 val = FLD_VAL(height - 1, 26, 16) | FLD_VAL(width - 1, 10, 0);
734 
735 	if (plane == OMAP_DSS_GFX || plane == OMAP_DSS_WB)
736 		dispc_write_reg(DISPC_OVL_SIZE(plane), val);
737 	else
738 		dispc_write_reg(DISPC_OVL_PICTURE_SIZE(plane), val);
739 }
740 
741 static void dispc_ovl_set_output_size(enum omap_plane plane, int width,
742 		int height)
743 {
744 	u32 val;
745 
746 	BUG_ON(plane == OMAP_DSS_GFX);
747 
748 	val = FLD_VAL(height - 1, 26, 16) | FLD_VAL(width - 1, 10, 0);
749 
750 	if (plane == OMAP_DSS_WB)
751 		dispc_write_reg(DISPC_OVL_PICTURE_SIZE(plane), val);
752 	else
753 		dispc_write_reg(DISPC_OVL_SIZE(plane), val);
754 }
755 
756 static void dispc_ovl_set_zorder(enum omap_plane plane,
757 		enum omap_overlay_caps caps, u8 zorder)
758 {
759 	if ((caps & OMAP_DSS_OVL_CAP_ZORDER) == 0)
760 		return;
761 
762 	REG_FLD_MOD(DISPC_OVL_ATTRIBUTES(plane), zorder, 27, 26);
763 }
764 
765 static void dispc_ovl_enable_zorder_planes(void)
766 {
767 	int i;
768 
769 	if (!dss_has_feature(FEAT_ALPHA_FREE_ZORDER))
770 		return;
771 
772 	for (i = 0; i < dss_feat_get_num_ovls(); i++)
773 		REG_FLD_MOD(DISPC_OVL_ATTRIBUTES(i), 1, 25, 25);
774 }
775 
776 static void dispc_ovl_set_pre_mult_alpha(enum omap_plane plane,
777 		enum omap_overlay_caps caps, bool enable)
778 {
779 	if ((caps & OMAP_DSS_OVL_CAP_PRE_MULT_ALPHA) == 0)
780 		return;
781 
782 	REG_FLD_MOD(DISPC_OVL_ATTRIBUTES(plane), enable ? 1 : 0, 28, 28);
783 }
784 
785 static void dispc_ovl_setup_global_alpha(enum omap_plane plane,
786 		enum omap_overlay_caps caps, u8 global_alpha)
787 {
788 	static const unsigned shifts[] = { 0, 8, 16, 24, };
789 	int shift;
790 
791 	if ((caps & OMAP_DSS_OVL_CAP_GLOBAL_ALPHA) == 0)
792 		return;
793 
794 	shift = shifts[plane];
795 	REG_FLD_MOD(DISPC_GLOBAL_ALPHA, global_alpha, shift + 7, shift);
796 }
797 
798 static void dispc_ovl_set_pix_inc(enum omap_plane plane, s32 inc)
799 {
800 	dispc_write_reg(DISPC_OVL_PIXEL_INC(plane), inc);
801 }
802 
803 static void dispc_ovl_set_row_inc(enum omap_plane plane, s32 inc)
804 {
805 	dispc_write_reg(DISPC_OVL_ROW_INC(plane), inc);
806 }
807 
808 static void dispc_ovl_set_color_mode(enum omap_plane plane,
809 		enum omap_color_mode color_mode)
810 {
811 	u32 m = 0;
812 	if (plane != OMAP_DSS_GFX) {
813 		switch (color_mode) {
814 		case OMAP_DSS_COLOR_NV12:
815 			m = 0x0; break;
816 		case OMAP_DSS_COLOR_RGBX16:
817 			m = 0x1; break;
818 		case OMAP_DSS_COLOR_RGBA16:
819 			m = 0x2; break;
820 		case OMAP_DSS_COLOR_RGB12U:
821 			m = 0x4; break;
822 		case OMAP_DSS_COLOR_ARGB16:
823 			m = 0x5; break;
824 		case OMAP_DSS_COLOR_RGB16:
825 			m = 0x6; break;
826 		case OMAP_DSS_COLOR_ARGB16_1555:
827 			m = 0x7; break;
828 		case OMAP_DSS_COLOR_RGB24U:
829 			m = 0x8; break;
830 		case OMAP_DSS_COLOR_RGB24P:
831 			m = 0x9; break;
832 		case OMAP_DSS_COLOR_YUV2:
833 			m = 0xa; break;
834 		case OMAP_DSS_COLOR_UYVY:
835 			m = 0xb; break;
836 		case OMAP_DSS_COLOR_ARGB32:
837 			m = 0xc; break;
838 		case OMAP_DSS_COLOR_RGBA32:
839 			m = 0xd; break;
840 		case OMAP_DSS_COLOR_RGBX32:
841 			m = 0xe; break;
842 		case OMAP_DSS_COLOR_XRGB16_1555:
843 			m = 0xf; break;
844 		default:
845 			BUG(); return;
846 		}
847 	} else {
848 		switch (color_mode) {
849 		case OMAP_DSS_COLOR_CLUT1:
850 			m = 0x0; break;
851 		case OMAP_DSS_COLOR_CLUT2:
852 			m = 0x1; break;
853 		case OMAP_DSS_COLOR_CLUT4:
854 			m = 0x2; break;
855 		case OMAP_DSS_COLOR_CLUT8:
856 			m = 0x3; break;
857 		case OMAP_DSS_COLOR_RGB12U:
858 			m = 0x4; break;
859 		case OMAP_DSS_COLOR_ARGB16:
860 			m = 0x5; break;
861 		case OMAP_DSS_COLOR_RGB16:
862 			m = 0x6; break;
863 		case OMAP_DSS_COLOR_ARGB16_1555:
864 			m = 0x7; break;
865 		case OMAP_DSS_COLOR_RGB24U:
866 			m = 0x8; break;
867 		case OMAP_DSS_COLOR_RGB24P:
868 			m = 0x9; break;
869 		case OMAP_DSS_COLOR_RGBX16:
870 			m = 0xa; break;
871 		case OMAP_DSS_COLOR_RGBA16:
872 			m = 0xb; break;
873 		case OMAP_DSS_COLOR_ARGB32:
874 			m = 0xc; break;
875 		case OMAP_DSS_COLOR_RGBA32:
876 			m = 0xd; break;
877 		case OMAP_DSS_COLOR_RGBX32:
878 			m = 0xe; break;
879 		case OMAP_DSS_COLOR_XRGB16_1555:
880 			m = 0xf; break;
881 		default:
882 			BUG(); return;
883 		}
884 	}
885 
886 	REG_FLD_MOD(DISPC_OVL_ATTRIBUTES(plane), m, 4, 1);
887 }
888 
889 static void dispc_ovl_configure_burst_type(enum omap_plane plane,
890 		enum omap_dss_rotation_type rotation_type)
891 {
892 	if (!dss_has_feature(FEAT_BURST_2D))
893 		return;
894 
895 	if (rotation_type == OMAP_DSS_ROT_TILER)
896 		REG_FLD_MOD(DISPC_OVL_ATTRIBUTES(plane), 1, 29, 29);
897 	else
898 		REG_FLD_MOD(DISPC_OVL_ATTRIBUTES(plane), 0, 29, 29);
899 }
900 
901 void dispc_ovl_set_channel_out(enum omap_plane plane, enum omap_channel channel)
902 {
903 	int shift;
904 	u32 val;
905 	int chan = 0, chan2 = 0;
906 
907 	switch (plane) {
908 	case OMAP_DSS_GFX:
909 		shift = 8;
910 		break;
911 	case OMAP_DSS_VIDEO1:
912 	case OMAP_DSS_VIDEO2:
913 	case OMAP_DSS_VIDEO3:
914 		shift = 16;
915 		break;
916 	default:
917 		BUG();
918 		return;
919 	}
920 
921 	val = dispc_read_reg(DISPC_OVL_ATTRIBUTES(plane));
922 	if (dss_has_feature(FEAT_MGR_LCD2)) {
923 		switch (channel) {
924 		case OMAP_DSS_CHANNEL_LCD:
925 			chan = 0;
926 			chan2 = 0;
927 			break;
928 		case OMAP_DSS_CHANNEL_DIGIT:
929 			chan = 1;
930 			chan2 = 0;
931 			break;
932 		case OMAP_DSS_CHANNEL_LCD2:
933 			chan = 0;
934 			chan2 = 1;
935 			break;
936 		case OMAP_DSS_CHANNEL_LCD3:
937 			if (dss_has_feature(FEAT_MGR_LCD3)) {
938 				chan = 0;
939 				chan2 = 2;
940 			} else {
941 				BUG();
942 				return;
943 			}
944 			break;
945 		case OMAP_DSS_CHANNEL_WB:
946 			chan = 0;
947 			chan2 = 3;
948 			break;
949 		default:
950 			BUG();
951 			return;
952 		}
953 
954 		val = FLD_MOD(val, chan, shift, shift);
955 		val = FLD_MOD(val, chan2, 31, 30);
956 	} else {
957 		val = FLD_MOD(val, channel, shift, shift);
958 	}
959 	dispc_write_reg(DISPC_OVL_ATTRIBUTES(plane), val);
960 }
961 EXPORT_SYMBOL(dispc_ovl_set_channel_out);
962 
963 static enum omap_channel dispc_ovl_get_channel_out(enum omap_plane plane)
964 {
965 	int shift;
966 	u32 val;
967 
968 	switch (plane) {
969 	case OMAP_DSS_GFX:
970 		shift = 8;
971 		break;
972 	case OMAP_DSS_VIDEO1:
973 	case OMAP_DSS_VIDEO2:
974 	case OMAP_DSS_VIDEO3:
975 		shift = 16;
976 		break;
977 	default:
978 		BUG();
979 		return 0;
980 	}
981 
982 	val = dispc_read_reg(DISPC_OVL_ATTRIBUTES(plane));
983 
984 	if (FLD_GET(val, shift, shift) == 1)
985 		return OMAP_DSS_CHANNEL_DIGIT;
986 
987 	if (!dss_has_feature(FEAT_MGR_LCD2))
988 		return OMAP_DSS_CHANNEL_LCD;
989 
990 	switch (FLD_GET(val, 31, 30)) {
991 	case 0:
992 	default:
993 		return OMAP_DSS_CHANNEL_LCD;
994 	case 1:
995 		return OMAP_DSS_CHANNEL_LCD2;
996 	case 2:
997 		return OMAP_DSS_CHANNEL_LCD3;
998 	case 3:
999 		return OMAP_DSS_CHANNEL_WB;
1000 	}
1001 }
1002 
1003 static void dispc_ovl_set_burst_size(enum omap_plane plane,
1004 		enum omap_burst_size burst_size)
1005 {
1006 	static const unsigned shifts[] = { 6, 14, 14, 14, 14, };
1007 	int shift;
1008 
1009 	shift = shifts[plane];
1010 	REG_FLD_MOD(DISPC_OVL_ATTRIBUTES(plane), burst_size, shift + 1, shift);
1011 }
1012 
1013 static void dispc_configure_burst_sizes(void)
1014 {
1015 	int i;
1016 	const int burst_size = BURST_SIZE_X8;
1017 
1018 	/* Configure burst size always to maximum size */
1019 	for (i = 0; i < dss_feat_get_num_ovls(); ++i)
1020 		dispc_ovl_set_burst_size(i, burst_size);
1021 	if (dispc.feat->has_writeback)
1022 		dispc_ovl_set_burst_size(OMAP_DSS_WB, burst_size);
1023 }
1024 
1025 static u32 dispc_ovl_get_burst_size(enum omap_plane plane)
1026 {
1027 	unsigned unit = dss_feat_get_burst_size_unit();
1028 	/* burst multiplier is always x8 (see dispc_configure_burst_sizes()) */
1029 	return unit * 8;
1030 }
1031 
1032 void dispc_enable_gamma_table(bool enable)
1033 {
1034 	/*
1035 	 * This is partially implemented to support only disabling of
1036 	 * the gamma table.
1037 	 */
1038 	if (enable) {
1039 		DSSWARN("Gamma table enabling for TV not yet supported");
1040 		return;
1041 	}
1042 
1043 	REG_FLD_MOD(DISPC_CONFIG, enable, 9, 9);
1044 }
1045 
1046 static void dispc_mgr_enable_cpr(enum omap_channel channel, bool enable)
1047 {
1048 	if (channel == OMAP_DSS_CHANNEL_DIGIT)
1049 		return;
1050 
1051 	mgr_fld_write(channel, DISPC_MGR_FLD_CPR, enable);
1052 }
1053 
1054 static void dispc_mgr_set_cpr_coef(enum omap_channel channel,
1055 		const struct omap_dss_cpr_coefs *coefs)
1056 {
1057 	u32 coef_r, coef_g, coef_b;
1058 
1059 	if (!dss_mgr_is_lcd(channel))
1060 		return;
1061 
1062 	coef_r = FLD_VAL(coefs->rr, 31, 22) | FLD_VAL(coefs->rg, 20, 11) |
1063 		FLD_VAL(coefs->rb, 9, 0);
1064 	coef_g = FLD_VAL(coefs->gr, 31, 22) | FLD_VAL(coefs->gg, 20, 11) |
1065 		FLD_VAL(coefs->gb, 9, 0);
1066 	coef_b = FLD_VAL(coefs->br, 31, 22) | FLD_VAL(coefs->bg, 20, 11) |
1067 		FLD_VAL(coefs->bb, 9, 0);
1068 
1069 	dispc_write_reg(DISPC_CPR_COEF_R(channel), coef_r);
1070 	dispc_write_reg(DISPC_CPR_COEF_G(channel), coef_g);
1071 	dispc_write_reg(DISPC_CPR_COEF_B(channel), coef_b);
1072 }
1073 
1074 static void dispc_ovl_set_vid_color_conv(enum omap_plane plane, bool enable)
1075 {
1076 	u32 val;
1077 
1078 	BUG_ON(plane == OMAP_DSS_GFX);
1079 
1080 	val = dispc_read_reg(DISPC_OVL_ATTRIBUTES(plane));
1081 	val = FLD_MOD(val, enable, 9, 9);
1082 	dispc_write_reg(DISPC_OVL_ATTRIBUTES(plane), val);
1083 }
1084 
1085 static void dispc_ovl_enable_replication(enum omap_plane plane,
1086 		enum omap_overlay_caps caps, bool enable)
1087 {
1088 	static const unsigned shifts[] = { 5, 10, 10, 10 };
1089 	int shift;
1090 
1091 	if ((caps & OMAP_DSS_OVL_CAP_REPLICATION) == 0)
1092 		return;
1093 
1094 	shift = shifts[plane];
1095 	REG_FLD_MOD(DISPC_OVL_ATTRIBUTES(plane), enable, shift, shift);
1096 }
1097 
1098 static void dispc_mgr_set_size(enum omap_channel channel, u16 width,
1099 		u16 height)
1100 {
1101 	u32 val;
1102 
1103 	val = FLD_VAL(height - 1, dispc.feat->mgr_height_start, 16) |
1104 		FLD_VAL(width - 1, dispc.feat->mgr_width_start, 0);
1105 
1106 	dispc_write_reg(DISPC_SIZE_MGR(channel), val);
1107 }
1108 
1109 static void dispc_init_fifos(void)
1110 {
1111 	u32 size;
1112 	int fifo;
1113 	u8 start, end;
1114 	u32 unit;
1115 	int i;
1116 
1117 	unit = dss_feat_get_buffer_size_unit();
1118 
1119 	dss_feat_get_reg_field(FEAT_REG_FIFOSIZE, &start, &end);
1120 
1121 	for (fifo = 0; fifo < dispc.feat->num_fifos; ++fifo) {
1122 		size = REG_GET(DISPC_OVL_FIFO_SIZE_STATUS(fifo), start, end);
1123 		size *= unit;
1124 		dispc.fifo_size[fifo] = size;
1125 
1126 		/*
1127 		 * By default fifos are mapped directly to overlays, fifo 0 to
1128 		 * ovl 0, fifo 1 to ovl 1, etc.
1129 		 */
1130 		dispc.fifo_assignment[fifo] = fifo;
1131 	}
1132 
1133 	/*
1134 	 * The GFX fifo on OMAP4 is smaller than the other fifos. The small fifo
1135 	 * causes problems with certain use cases, like using the tiler in 2D
1136 	 * mode. The below hack swaps the fifos of GFX and WB planes, thus
1137 	 * giving GFX plane a larger fifo. WB but should work fine with a
1138 	 * smaller fifo.
1139 	 */
1140 	if (dispc.feat->gfx_fifo_workaround) {
1141 		u32 v;
1142 
1143 		v = dispc_read_reg(DISPC_GLOBAL_BUFFER);
1144 
1145 		v = FLD_MOD(v, 4, 2, 0); /* GFX BUF top to WB */
1146 		v = FLD_MOD(v, 4, 5, 3); /* GFX BUF bottom to WB */
1147 		v = FLD_MOD(v, 0, 26, 24); /* WB BUF top to GFX */
1148 		v = FLD_MOD(v, 0, 29, 27); /* WB BUF bottom to GFX */
1149 
1150 		dispc_write_reg(DISPC_GLOBAL_BUFFER, v);
1151 
1152 		dispc.fifo_assignment[OMAP_DSS_GFX] = OMAP_DSS_WB;
1153 		dispc.fifo_assignment[OMAP_DSS_WB] = OMAP_DSS_GFX;
1154 	}
1155 
1156 	/*
1157 	 * Setup default fifo thresholds.
1158 	 */
1159 	for (i = 0; i < dss_feat_get_num_ovls(); ++i) {
1160 		u32 low, high;
1161 		const bool use_fifomerge = false;
1162 		const bool manual_update = false;
1163 
1164 		dispc_ovl_compute_fifo_thresholds(i, &low, &high,
1165 			use_fifomerge, manual_update);
1166 
1167 		dispc_ovl_set_fifo_threshold(i, low, high);
1168 	}
1169 
1170 	if (dispc.feat->has_writeback) {
1171 		u32 low, high;
1172 		const bool use_fifomerge = false;
1173 		const bool manual_update = false;
1174 
1175 		dispc_ovl_compute_fifo_thresholds(OMAP_DSS_WB, &low, &high,
1176 			use_fifomerge, manual_update);
1177 
1178 		dispc_ovl_set_fifo_threshold(OMAP_DSS_WB, low, high);
1179 	}
1180 }
1181 
1182 static u32 dispc_ovl_get_fifo_size(enum omap_plane plane)
1183 {
1184 	int fifo;
1185 	u32 size = 0;
1186 
1187 	for (fifo = 0; fifo < dispc.feat->num_fifos; ++fifo) {
1188 		if (dispc.fifo_assignment[fifo] == plane)
1189 			size += dispc.fifo_size[fifo];
1190 	}
1191 
1192 	return size;
1193 }
1194 
1195 void dispc_ovl_set_fifo_threshold(enum omap_plane plane, u32 low, u32 high)
1196 {
1197 	u8 hi_start, hi_end, lo_start, lo_end;
1198 	u32 unit;
1199 
1200 	unit = dss_feat_get_buffer_size_unit();
1201 
1202 	WARN_ON(low % unit != 0);
1203 	WARN_ON(high % unit != 0);
1204 
1205 	low /= unit;
1206 	high /= unit;
1207 
1208 	dss_feat_get_reg_field(FEAT_REG_FIFOHIGHTHRESHOLD, &hi_start, &hi_end);
1209 	dss_feat_get_reg_field(FEAT_REG_FIFOLOWTHRESHOLD, &lo_start, &lo_end);
1210 
1211 	DSSDBG("fifo(%d) threshold (bytes), old %u/%u, new %u/%u\n",
1212 			plane,
1213 			REG_GET(DISPC_OVL_FIFO_THRESHOLD(plane),
1214 				lo_start, lo_end) * unit,
1215 			REG_GET(DISPC_OVL_FIFO_THRESHOLD(plane),
1216 				hi_start, hi_end) * unit,
1217 			low * unit, high * unit);
1218 
1219 	dispc_write_reg(DISPC_OVL_FIFO_THRESHOLD(plane),
1220 			FLD_VAL(high, hi_start, hi_end) |
1221 			FLD_VAL(low, lo_start, lo_end));
1222 
1223 	/*
1224 	 * configure the preload to the pipeline's high threhold, if HT it's too
1225 	 * large for the preload field, set the threshold to the maximum value
1226 	 * that can be held by the preload register
1227 	 */
1228 	if (dss_has_feature(FEAT_PRELOAD) && dispc.feat->set_max_preload &&
1229 			plane != OMAP_DSS_WB)
1230 		dispc_write_reg(DISPC_OVL_PRELOAD(plane), min(high, 0xfffu));
1231 }
1232 
1233 void dispc_enable_fifomerge(bool enable)
1234 {
1235 	if (!dss_has_feature(FEAT_FIFO_MERGE)) {
1236 		WARN_ON(enable);
1237 		return;
1238 	}
1239 
1240 	DSSDBG("FIFO merge %s\n", enable ? "enabled" : "disabled");
1241 	REG_FLD_MOD(DISPC_CONFIG, enable ? 1 : 0, 14, 14);
1242 }
1243 
1244 void dispc_ovl_compute_fifo_thresholds(enum omap_plane plane,
1245 		u32 *fifo_low, u32 *fifo_high, bool use_fifomerge,
1246 		bool manual_update)
1247 {
1248 	/*
1249 	 * All sizes are in bytes. Both the buffer and burst are made of
1250 	 * buffer_units, and the fifo thresholds must be buffer_unit aligned.
1251 	 */
1252 
1253 	unsigned buf_unit = dss_feat_get_buffer_size_unit();
1254 	unsigned ovl_fifo_size, total_fifo_size, burst_size;
1255 	int i;
1256 
1257 	burst_size = dispc_ovl_get_burst_size(plane);
1258 	ovl_fifo_size = dispc_ovl_get_fifo_size(plane);
1259 
1260 	if (use_fifomerge) {
1261 		total_fifo_size = 0;
1262 		for (i = 0; i < dss_feat_get_num_ovls(); ++i)
1263 			total_fifo_size += dispc_ovl_get_fifo_size(i);
1264 	} else {
1265 		total_fifo_size = ovl_fifo_size;
1266 	}
1267 
1268 	/*
1269 	 * We use the same low threshold for both fifomerge and non-fifomerge
1270 	 * cases, but for fifomerge we calculate the high threshold using the
1271 	 * combined fifo size
1272 	 */
1273 
1274 	if (manual_update && dss_has_feature(FEAT_OMAP3_DSI_FIFO_BUG)) {
1275 		*fifo_low = ovl_fifo_size - burst_size * 2;
1276 		*fifo_high = total_fifo_size - burst_size;
1277 	} else if (plane == OMAP_DSS_WB) {
1278 		/*
1279 		 * Most optimal configuration for writeback is to push out data
1280 		 * to the interconnect the moment writeback pushes enough pixels
1281 		 * in the FIFO to form a burst
1282 		 */
1283 		*fifo_low = 0;
1284 		*fifo_high = burst_size;
1285 	} else {
1286 		*fifo_low = ovl_fifo_size - burst_size;
1287 		*fifo_high = total_fifo_size - buf_unit;
1288 	}
1289 }
1290 
1291 static void dispc_ovl_set_mflag(enum omap_plane plane, bool enable)
1292 {
1293 	int bit;
1294 
1295 	if (plane == OMAP_DSS_GFX)
1296 		bit = 14;
1297 	else
1298 		bit = 23;
1299 
1300 	REG_FLD_MOD(DISPC_OVL_ATTRIBUTES(plane), enable, bit, bit);
1301 }
1302 
1303 static void dispc_ovl_set_mflag_threshold(enum omap_plane plane,
1304 	int low, int high)
1305 {
1306 	dispc_write_reg(DISPC_OVL_MFLAG_THRESHOLD(plane),
1307 		FLD_VAL(high, 31, 16) |	FLD_VAL(low, 15, 0));
1308 }
1309 
1310 static void dispc_init_mflag(void)
1311 {
1312 	int i;
1313 
1314 	/*
1315 	 * HACK: NV12 color format and MFLAG seem to have problems working
1316 	 * together: using two displays, and having an NV12 overlay on one of
1317 	 * the displays will cause underflows/synclosts when MFLAG_CTRL=2.
1318 	 * Changing MFLAG thresholds and PRELOAD to certain values seem to
1319 	 * remove the errors, but there doesn't seem to be a clear logic on
1320 	 * which values work and which not.
1321 	 *
1322 	 * As a work-around, set force MFLAG to always on.
1323 	 */
1324 	dispc_write_reg(DISPC_GLOBAL_MFLAG_ATTRIBUTE,
1325 		(1 << 0) |	/* MFLAG_CTRL = force always on */
1326 		(0 << 2));	/* MFLAG_START = disable */
1327 
1328 	for (i = 0; i < dss_feat_get_num_ovls(); ++i) {
1329 		u32 size = dispc_ovl_get_fifo_size(i);
1330 		u32 unit = dss_feat_get_buffer_size_unit();
1331 		u32 low, high;
1332 
1333 		dispc_ovl_set_mflag(i, true);
1334 
1335 		/*
1336 		 * Simulation team suggests below thesholds:
1337 		 * HT = fifosize * 5 / 8;
1338 		 * LT = fifosize * 4 / 8;
1339 		 */
1340 
1341 		low = size * 4 / 8 / unit;
1342 		high = size * 5 / 8 / unit;
1343 
1344 		dispc_ovl_set_mflag_threshold(i, low, high);
1345 	}
1346 
1347 	if (dispc.feat->has_writeback) {
1348 		u32 size = dispc_ovl_get_fifo_size(OMAP_DSS_WB);
1349 		u32 unit = dss_feat_get_buffer_size_unit();
1350 		u32 low, high;
1351 
1352 		dispc_ovl_set_mflag(OMAP_DSS_WB, true);
1353 
1354 		/*
1355 		 * Simulation team suggests below thesholds:
1356 		 * HT = fifosize * 5 / 8;
1357 		 * LT = fifosize * 4 / 8;
1358 		 */
1359 
1360 		low = size * 4 / 8 / unit;
1361 		high = size * 5 / 8 / unit;
1362 
1363 		dispc_ovl_set_mflag_threshold(OMAP_DSS_WB, low, high);
1364 	}
1365 }
1366 
1367 static void dispc_ovl_set_fir(enum omap_plane plane,
1368 				int hinc, int vinc,
1369 				enum omap_color_component color_comp)
1370 {
1371 	u32 val;
1372 
1373 	if (color_comp == DISPC_COLOR_COMPONENT_RGB_Y) {
1374 		u8 hinc_start, hinc_end, vinc_start, vinc_end;
1375 
1376 		dss_feat_get_reg_field(FEAT_REG_FIRHINC,
1377 					&hinc_start, &hinc_end);
1378 		dss_feat_get_reg_field(FEAT_REG_FIRVINC,
1379 					&vinc_start, &vinc_end);
1380 		val = FLD_VAL(vinc, vinc_start, vinc_end) |
1381 				FLD_VAL(hinc, hinc_start, hinc_end);
1382 
1383 		dispc_write_reg(DISPC_OVL_FIR(plane), val);
1384 	} else {
1385 		val = FLD_VAL(vinc, 28, 16) | FLD_VAL(hinc, 12, 0);
1386 		dispc_write_reg(DISPC_OVL_FIR2(plane), val);
1387 	}
1388 }
1389 
1390 static void dispc_ovl_set_vid_accu0(enum omap_plane plane, int haccu, int vaccu)
1391 {
1392 	u32 val;
1393 	u8 hor_start, hor_end, vert_start, vert_end;
1394 
1395 	dss_feat_get_reg_field(FEAT_REG_HORIZONTALACCU, &hor_start, &hor_end);
1396 	dss_feat_get_reg_field(FEAT_REG_VERTICALACCU, &vert_start, &vert_end);
1397 
1398 	val = FLD_VAL(vaccu, vert_start, vert_end) |
1399 			FLD_VAL(haccu, hor_start, hor_end);
1400 
1401 	dispc_write_reg(DISPC_OVL_ACCU0(plane), val);
1402 }
1403 
1404 static void dispc_ovl_set_vid_accu1(enum omap_plane plane, int haccu, int vaccu)
1405 {
1406 	u32 val;
1407 	u8 hor_start, hor_end, vert_start, vert_end;
1408 
1409 	dss_feat_get_reg_field(FEAT_REG_HORIZONTALACCU, &hor_start, &hor_end);
1410 	dss_feat_get_reg_field(FEAT_REG_VERTICALACCU, &vert_start, &vert_end);
1411 
1412 	val = FLD_VAL(vaccu, vert_start, vert_end) |
1413 			FLD_VAL(haccu, hor_start, hor_end);
1414 
1415 	dispc_write_reg(DISPC_OVL_ACCU1(plane), val);
1416 }
1417 
1418 static void dispc_ovl_set_vid_accu2_0(enum omap_plane plane, int haccu,
1419 		int vaccu)
1420 {
1421 	u32 val;
1422 
1423 	val = FLD_VAL(vaccu, 26, 16) | FLD_VAL(haccu, 10, 0);
1424 	dispc_write_reg(DISPC_OVL_ACCU2_0(plane), val);
1425 }
1426 
1427 static void dispc_ovl_set_vid_accu2_1(enum omap_plane plane, int haccu,
1428 		int vaccu)
1429 {
1430 	u32 val;
1431 
1432 	val = FLD_VAL(vaccu, 26, 16) | FLD_VAL(haccu, 10, 0);
1433 	dispc_write_reg(DISPC_OVL_ACCU2_1(plane), val);
1434 }
1435 
1436 static void dispc_ovl_set_scale_param(enum omap_plane plane,
1437 		u16 orig_width, u16 orig_height,
1438 		u16 out_width, u16 out_height,
1439 		bool five_taps, u8 rotation,
1440 		enum omap_color_component color_comp)
1441 {
1442 	int fir_hinc, fir_vinc;
1443 
1444 	fir_hinc = 1024 * orig_width / out_width;
1445 	fir_vinc = 1024 * orig_height / out_height;
1446 
1447 	dispc_ovl_set_scale_coef(plane, fir_hinc, fir_vinc, five_taps,
1448 				color_comp);
1449 	dispc_ovl_set_fir(plane, fir_hinc, fir_vinc, color_comp);
1450 }
1451 
1452 static void dispc_ovl_set_accu_uv(enum omap_plane plane,
1453 		u16 orig_width,	u16 orig_height, u16 out_width, u16 out_height,
1454 		bool ilace, enum omap_color_mode color_mode, u8 rotation)
1455 {
1456 	int h_accu2_0, h_accu2_1;
1457 	int v_accu2_0, v_accu2_1;
1458 	int chroma_hinc, chroma_vinc;
1459 	int idx;
1460 
1461 	struct accu {
1462 		s8 h0_m, h0_n;
1463 		s8 h1_m, h1_n;
1464 		s8 v0_m, v0_n;
1465 		s8 v1_m, v1_n;
1466 	};
1467 
1468 	const struct accu *accu_table;
1469 	const struct accu *accu_val;
1470 
1471 	static const struct accu accu_nv12[4] = {
1472 		{  0, 1,  0, 1 , -1, 2, 0, 1 },
1473 		{  1, 2, -3, 4 ,  0, 1, 0, 1 },
1474 		{ -1, 1,  0, 1 , -1, 2, 0, 1 },
1475 		{ -1, 2, -1, 2 , -1, 1, 0, 1 },
1476 	};
1477 
1478 	static const struct accu accu_nv12_ilace[4] = {
1479 		{  0, 1,  0, 1 , -3, 4, -1, 4 },
1480 		{ -1, 4, -3, 4 ,  0, 1,  0, 1 },
1481 		{ -1, 1,  0, 1 , -1, 4, -3, 4 },
1482 		{ -3, 4, -3, 4 , -1, 1,  0, 1 },
1483 	};
1484 
1485 	static const struct accu accu_yuv[4] = {
1486 		{  0, 1, 0, 1,  0, 1, 0, 1 },
1487 		{  0, 1, 0, 1,  0, 1, 0, 1 },
1488 		{ -1, 1, 0, 1,  0, 1, 0, 1 },
1489 		{  0, 1, 0, 1, -1, 1, 0, 1 },
1490 	};
1491 
1492 	switch (rotation) {
1493 	case OMAP_DSS_ROT_0:
1494 		idx = 0;
1495 		break;
1496 	case OMAP_DSS_ROT_90:
1497 		idx = 1;
1498 		break;
1499 	case OMAP_DSS_ROT_180:
1500 		idx = 2;
1501 		break;
1502 	case OMAP_DSS_ROT_270:
1503 		idx = 3;
1504 		break;
1505 	default:
1506 		BUG();
1507 		return;
1508 	}
1509 
1510 	switch (color_mode) {
1511 	case OMAP_DSS_COLOR_NV12:
1512 		if (ilace)
1513 			accu_table = accu_nv12_ilace;
1514 		else
1515 			accu_table = accu_nv12;
1516 		break;
1517 	case OMAP_DSS_COLOR_YUV2:
1518 	case OMAP_DSS_COLOR_UYVY:
1519 		accu_table = accu_yuv;
1520 		break;
1521 	default:
1522 		BUG();
1523 		return;
1524 	}
1525 
1526 	accu_val = &accu_table[idx];
1527 
1528 	chroma_hinc = 1024 * orig_width / out_width;
1529 	chroma_vinc = 1024 * orig_height / out_height;
1530 
1531 	h_accu2_0 = (accu_val->h0_m * chroma_hinc / accu_val->h0_n) % 1024;
1532 	h_accu2_1 = (accu_val->h1_m * chroma_hinc / accu_val->h1_n) % 1024;
1533 	v_accu2_0 = (accu_val->v0_m * chroma_vinc / accu_val->v0_n) % 1024;
1534 	v_accu2_1 = (accu_val->v1_m * chroma_vinc / accu_val->v1_n) % 1024;
1535 
1536 	dispc_ovl_set_vid_accu2_0(plane, h_accu2_0, v_accu2_0);
1537 	dispc_ovl_set_vid_accu2_1(plane, h_accu2_1, v_accu2_1);
1538 }
1539 
1540 static void dispc_ovl_set_scaling_common(enum omap_plane plane,
1541 		u16 orig_width, u16 orig_height,
1542 		u16 out_width, u16 out_height,
1543 		bool ilace, bool five_taps,
1544 		bool fieldmode, enum omap_color_mode color_mode,
1545 		u8 rotation)
1546 {
1547 	int accu0 = 0;
1548 	int accu1 = 0;
1549 	u32 l;
1550 
1551 	dispc_ovl_set_scale_param(plane, orig_width, orig_height,
1552 				out_width, out_height, five_taps,
1553 				rotation, DISPC_COLOR_COMPONENT_RGB_Y);
1554 	l = dispc_read_reg(DISPC_OVL_ATTRIBUTES(plane));
1555 
1556 	/* RESIZEENABLE and VERTICALTAPS */
1557 	l &= ~((0x3 << 5) | (0x1 << 21));
1558 	l |= (orig_width != out_width) ? (1 << 5) : 0;
1559 	l |= (orig_height != out_height) ? (1 << 6) : 0;
1560 	l |= five_taps ? (1 << 21) : 0;
1561 
1562 	/* VRESIZECONF and HRESIZECONF */
1563 	if (dss_has_feature(FEAT_RESIZECONF)) {
1564 		l &= ~(0x3 << 7);
1565 		l |= (orig_width <= out_width) ? 0 : (1 << 7);
1566 		l |= (orig_height <= out_height) ? 0 : (1 << 8);
1567 	}
1568 
1569 	/* LINEBUFFERSPLIT */
1570 	if (dss_has_feature(FEAT_LINEBUFFERSPLIT)) {
1571 		l &= ~(0x1 << 22);
1572 		l |= five_taps ? (1 << 22) : 0;
1573 	}
1574 
1575 	dispc_write_reg(DISPC_OVL_ATTRIBUTES(plane), l);
1576 
1577 	/*
1578 	 * field 0 = even field = bottom field
1579 	 * field 1 = odd field = top field
1580 	 */
1581 	if (ilace && !fieldmode) {
1582 		accu1 = 0;
1583 		accu0 = ((1024 * orig_height / out_height) / 2) & 0x3ff;
1584 		if (accu0 >= 1024/2) {
1585 			accu1 = 1024/2;
1586 			accu0 -= accu1;
1587 		}
1588 	}
1589 
1590 	dispc_ovl_set_vid_accu0(plane, 0, accu0);
1591 	dispc_ovl_set_vid_accu1(plane, 0, accu1);
1592 }
1593 
1594 static void dispc_ovl_set_scaling_uv(enum omap_plane plane,
1595 		u16 orig_width, u16 orig_height,
1596 		u16 out_width, u16 out_height,
1597 		bool ilace, bool five_taps,
1598 		bool fieldmode, enum omap_color_mode color_mode,
1599 		u8 rotation)
1600 {
1601 	int scale_x = out_width != orig_width;
1602 	int scale_y = out_height != orig_height;
1603 	bool chroma_upscale = plane != OMAP_DSS_WB;
1604 
1605 	if (!dss_has_feature(FEAT_HANDLE_UV_SEPARATE))
1606 		return;
1607 	if ((color_mode != OMAP_DSS_COLOR_YUV2 &&
1608 			color_mode != OMAP_DSS_COLOR_UYVY &&
1609 			color_mode != OMAP_DSS_COLOR_NV12)) {
1610 		/* reset chroma resampling for RGB formats  */
1611 		if (plane != OMAP_DSS_WB)
1612 			REG_FLD_MOD(DISPC_OVL_ATTRIBUTES2(plane), 0, 8, 8);
1613 		return;
1614 	}
1615 
1616 	dispc_ovl_set_accu_uv(plane, orig_width, orig_height, out_width,
1617 			out_height, ilace, color_mode, rotation);
1618 
1619 	switch (color_mode) {
1620 	case OMAP_DSS_COLOR_NV12:
1621 		if (chroma_upscale) {
1622 			/* UV is subsampled by 2 horizontally and vertically */
1623 			orig_height >>= 1;
1624 			orig_width >>= 1;
1625 		} else {
1626 			/* UV is downsampled by 2 horizontally and vertically */
1627 			orig_height <<= 1;
1628 			orig_width <<= 1;
1629 		}
1630 
1631 		break;
1632 	case OMAP_DSS_COLOR_YUV2:
1633 	case OMAP_DSS_COLOR_UYVY:
1634 		/* For YUV422 with 90/270 rotation, we don't upsample chroma */
1635 		if (rotation == OMAP_DSS_ROT_0 ||
1636 				rotation == OMAP_DSS_ROT_180) {
1637 			if (chroma_upscale)
1638 				/* UV is subsampled by 2 horizontally */
1639 				orig_width >>= 1;
1640 			else
1641 				/* UV is downsampled by 2 horizontally */
1642 				orig_width <<= 1;
1643 		}
1644 
1645 		/* must use FIR for YUV422 if rotated */
1646 		if (rotation != OMAP_DSS_ROT_0)
1647 			scale_x = scale_y = true;
1648 
1649 		break;
1650 	default:
1651 		BUG();
1652 		return;
1653 	}
1654 
1655 	if (out_width != orig_width)
1656 		scale_x = true;
1657 	if (out_height != orig_height)
1658 		scale_y = true;
1659 
1660 	dispc_ovl_set_scale_param(plane, orig_width, orig_height,
1661 			out_width, out_height, five_taps,
1662 				rotation, DISPC_COLOR_COMPONENT_UV);
1663 
1664 	if (plane != OMAP_DSS_WB)
1665 		REG_FLD_MOD(DISPC_OVL_ATTRIBUTES2(plane),
1666 			(scale_x || scale_y) ? 1 : 0, 8, 8);
1667 
1668 	/* set H scaling */
1669 	REG_FLD_MOD(DISPC_OVL_ATTRIBUTES(plane), scale_x ? 1 : 0, 5, 5);
1670 	/* set V scaling */
1671 	REG_FLD_MOD(DISPC_OVL_ATTRIBUTES(plane), scale_y ? 1 : 0, 6, 6);
1672 }
1673 
1674 static void dispc_ovl_set_scaling(enum omap_plane plane,
1675 		u16 orig_width, u16 orig_height,
1676 		u16 out_width, u16 out_height,
1677 		bool ilace, bool five_taps,
1678 		bool fieldmode, enum omap_color_mode color_mode,
1679 		u8 rotation)
1680 {
1681 	BUG_ON(plane == OMAP_DSS_GFX);
1682 
1683 	dispc_ovl_set_scaling_common(plane,
1684 			orig_width, orig_height,
1685 			out_width, out_height,
1686 			ilace, five_taps,
1687 			fieldmode, color_mode,
1688 			rotation);
1689 
1690 	dispc_ovl_set_scaling_uv(plane,
1691 		orig_width, orig_height,
1692 		out_width, out_height,
1693 		ilace, five_taps,
1694 		fieldmode, color_mode,
1695 		rotation);
1696 }
1697 
1698 static void dispc_ovl_set_rotation_attrs(enum omap_plane plane, u8 rotation,
1699 		enum omap_dss_rotation_type rotation_type,
1700 		bool mirroring, enum omap_color_mode color_mode)
1701 {
1702 	bool row_repeat = false;
1703 	int vidrot = 0;
1704 
1705 	if (color_mode == OMAP_DSS_COLOR_YUV2 ||
1706 			color_mode == OMAP_DSS_COLOR_UYVY) {
1707 
1708 		if (mirroring) {
1709 			switch (rotation) {
1710 			case OMAP_DSS_ROT_0:
1711 				vidrot = 2;
1712 				break;
1713 			case OMAP_DSS_ROT_90:
1714 				vidrot = 1;
1715 				break;
1716 			case OMAP_DSS_ROT_180:
1717 				vidrot = 0;
1718 				break;
1719 			case OMAP_DSS_ROT_270:
1720 				vidrot = 3;
1721 				break;
1722 			}
1723 		} else {
1724 			switch (rotation) {
1725 			case OMAP_DSS_ROT_0:
1726 				vidrot = 0;
1727 				break;
1728 			case OMAP_DSS_ROT_90:
1729 				vidrot = 1;
1730 				break;
1731 			case OMAP_DSS_ROT_180:
1732 				vidrot = 2;
1733 				break;
1734 			case OMAP_DSS_ROT_270:
1735 				vidrot = 3;
1736 				break;
1737 			}
1738 		}
1739 
1740 		if (rotation == OMAP_DSS_ROT_90 || rotation == OMAP_DSS_ROT_270)
1741 			row_repeat = true;
1742 		else
1743 			row_repeat = false;
1744 	}
1745 
1746 	/*
1747 	 * OMAP4/5 Errata i631:
1748 	 * NV12 in 1D mode must use ROTATION=1. Otherwise DSS will fetch extra
1749 	 * rows beyond the framebuffer, which may cause OCP error.
1750 	 */
1751 	if (color_mode == OMAP_DSS_COLOR_NV12 &&
1752 			rotation_type != OMAP_DSS_ROT_TILER)
1753 		vidrot = 1;
1754 
1755 	REG_FLD_MOD(DISPC_OVL_ATTRIBUTES(plane), vidrot, 13, 12);
1756 	if (dss_has_feature(FEAT_ROWREPEATENABLE))
1757 		REG_FLD_MOD(DISPC_OVL_ATTRIBUTES(plane),
1758 			row_repeat ? 1 : 0, 18, 18);
1759 
1760 	if (color_mode == OMAP_DSS_COLOR_NV12) {
1761 		bool doublestride = (rotation_type == OMAP_DSS_ROT_TILER) &&
1762 					(rotation == OMAP_DSS_ROT_0 ||
1763 					rotation == OMAP_DSS_ROT_180);
1764 		/* DOUBLESTRIDE */
1765 		REG_FLD_MOD(DISPC_OVL_ATTRIBUTES(plane), doublestride, 22, 22);
1766 	}
1767 
1768 }
1769 
1770 static int color_mode_to_bpp(enum omap_color_mode color_mode)
1771 {
1772 	switch (color_mode) {
1773 	case OMAP_DSS_COLOR_CLUT1:
1774 		return 1;
1775 	case OMAP_DSS_COLOR_CLUT2:
1776 		return 2;
1777 	case OMAP_DSS_COLOR_CLUT4:
1778 		return 4;
1779 	case OMAP_DSS_COLOR_CLUT8:
1780 	case OMAP_DSS_COLOR_NV12:
1781 		return 8;
1782 	case OMAP_DSS_COLOR_RGB12U:
1783 	case OMAP_DSS_COLOR_RGB16:
1784 	case OMAP_DSS_COLOR_ARGB16:
1785 	case OMAP_DSS_COLOR_YUV2:
1786 	case OMAP_DSS_COLOR_UYVY:
1787 	case OMAP_DSS_COLOR_RGBA16:
1788 	case OMAP_DSS_COLOR_RGBX16:
1789 	case OMAP_DSS_COLOR_ARGB16_1555:
1790 	case OMAP_DSS_COLOR_XRGB16_1555:
1791 		return 16;
1792 	case OMAP_DSS_COLOR_RGB24P:
1793 		return 24;
1794 	case OMAP_DSS_COLOR_RGB24U:
1795 	case OMAP_DSS_COLOR_ARGB32:
1796 	case OMAP_DSS_COLOR_RGBA32:
1797 	case OMAP_DSS_COLOR_RGBX32:
1798 		return 32;
1799 	default:
1800 		BUG();
1801 		return 0;
1802 	}
1803 }
1804 
1805 static s32 pixinc(int pixels, u8 ps)
1806 {
1807 	if (pixels == 1)
1808 		return 1;
1809 	else if (pixels > 1)
1810 		return 1 + (pixels - 1) * ps;
1811 	else if (pixels < 0)
1812 		return 1 - (-pixels + 1) * ps;
1813 	else
1814 		BUG();
1815 	return 0;
1816 }
1817 
1818 static void calc_vrfb_rotation_offset(u8 rotation, bool mirror,
1819 		u16 screen_width,
1820 		u16 width, u16 height,
1821 		enum omap_color_mode color_mode, bool fieldmode,
1822 		unsigned int field_offset,
1823 		unsigned *offset0, unsigned *offset1,
1824 		s32 *row_inc, s32 *pix_inc, int x_predecim, int y_predecim)
1825 {
1826 	u8 ps;
1827 
1828 	/* FIXME CLUT formats */
1829 	switch (color_mode) {
1830 	case OMAP_DSS_COLOR_CLUT1:
1831 	case OMAP_DSS_COLOR_CLUT2:
1832 	case OMAP_DSS_COLOR_CLUT4:
1833 	case OMAP_DSS_COLOR_CLUT8:
1834 		BUG();
1835 		return;
1836 	case OMAP_DSS_COLOR_YUV2:
1837 	case OMAP_DSS_COLOR_UYVY:
1838 		ps = 4;
1839 		break;
1840 	default:
1841 		ps = color_mode_to_bpp(color_mode) / 8;
1842 		break;
1843 	}
1844 
1845 	DSSDBG("calc_rot(%d): scrw %d, %dx%d\n", rotation, screen_width,
1846 			width, height);
1847 
1848 	/*
1849 	 * field 0 = even field = bottom field
1850 	 * field 1 = odd field = top field
1851 	 */
1852 	switch (rotation + mirror * 4) {
1853 	case OMAP_DSS_ROT_0:
1854 	case OMAP_DSS_ROT_180:
1855 		/*
1856 		 * If the pixel format is YUV or UYVY divide the width
1857 		 * of the image by 2 for 0 and 180 degree rotation.
1858 		 */
1859 		if (color_mode == OMAP_DSS_COLOR_YUV2 ||
1860 			color_mode == OMAP_DSS_COLOR_UYVY)
1861 			width = width >> 1;
1862 		fallthrough;
1863 	case OMAP_DSS_ROT_90:
1864 	case OMAP_DSS_ROT_270:
1865 		*offset1 = 0;
1866 		if (field_offset)
1867 			*offset0 = field_offset * screen_width * ps;
1868 		else
1869 			*offset0 = 0;
1870 
1871 		*row_inc = pixinc(1 +
1872 			(y_predecim * screen_width - x_predecim * width) +
1873 			(fieldmode ? screen_width : 0), ps);
1874 		*pix_inc = pixinc(x_predecim, ps);
1875 		break;
1876 
1877 	case OMAP_DSS_ROT_0 + 4:
1878 	case OMAP_DSS_ROT_180 + 4:
1879 		/* If the pixel format is YUV or UYVY divide the width
1880 		 * of the image by 2  for 0 degree and 180 degree
1881 		 */
1882 		if (color_mode == OMAP_DSS_COLOR_YUV2 ||
1883 			color_mode == OMAP_DSS_COLOR_UYVY)
1884 			width = width >> 1;
1885 		fallthrough;
1886 	case OMAP_DSS_ROT_90 + 4:
1887 	case OMAP_DSS_ROT_270 + 4:
1888 		*offset1 = 0;
1889 		if (field_offset)
1890 			*offset0 = field_offset * screen_width * ps;
1891 		else
1892 			*offset0 = 0;
1893 		*row_inc = pixinc(1 -
1894 			(y_predecim * screen_width + x_predecim * width) -
1895 			(fieldmode ? screen_width : 0), ps);
1896 		*pix_inc = pixinc(x_predecim, ps);
1897 		break;
1898 
1899 	default:
1900 		BUG();
1901 		return;
1902 	}
1903 }
1904 
1905 static void calc_dma_rotation_offset(u8 rotation, bool mirror,
1906 		u16 screen_width,
1907 		u16 width, u16 height,
1908 		enum omap_color_mode color_mode, bool fieldmode,
1909 		unsigned int field_offset,
1910 		unsigned *offset0, unsigned *offset1,
1911 		s32 *row_inc, s32 *pix_inc, int x_predecim, int y_predecim)
1912 {
1913 	u8 ps;
1914 	u16 fbw, fbh;
1915 
1916 	/* FIXME CLUT formats */
1917 	switch (color_mode) {
1918 	case OMAP_DSS_COLOR_CLUT1:
1919 	case OMAP_DSS_COLOR_CLUT2:
1920 	case OMAP_DSS_COLOR_CLUT4:
1921 	case OMAP_DSS_COLOR_CLUT8:
1922 		BUG();
1923 		return;
1924 	default:
1925 		ps = color_mode_to_bpp(color_mode) / 8;
1926 		break;
1927 	}
1928 
1929 	DSSDBG("calc_rot(%d): scrw %d, %dx%d\n", rotation, screen_width,
1930 			width, height);
1931 
1932 	/* width & height are overlay sizes, convert to fb sizes */
1933 
1934 	if (rotation == OMAP_DSS_ROT_0 || rotation == OMAP_DSS_ROT_180) {
1935 		fbw = width;
1936 		fbh = height;
1937 	} else {
1938 		fbw = height;
1939 		fbh = width;
1940 	}
1941 
1942 	/*
1943 	 * field 0 = even field = bottom field
1944 	 * field 1 = odd field = top field
1945 	 */
1946 	switch (rotation + mirror * 4) {
1947 	case OMAP_DSS_ROT_0:
1948 		*offset1 = 0;
1949 		if (field_offset)
1950 			*offset0 = *offset1 + field_offset * screen_width * ps;
1951 		else
1952 			*offset0 = *offset1;
1953 		*row_inc = pixinc(1 +
1954 			(y_predecim * screen_width - fbw * x_predecim) +
1955 			(fieldmode ? screen_width : 0),	ps);
1956 		if (color_mode == OMAP_DSS_COLOR_YUV2 ||
1957 			color_mode == OMAP_DSS_COLOR_UYVY)
1958 			*pix_inc = pixinc(x_predecim, 2 * ps);
1959 		else
1960 			*pix_inc = pixinc(x_predecim, ps);
1961 		break;
1962 	case OMAP_DSS_ROT_90:
1963 		*offset1 = screen_width * (fbh - 1) * ps;
1964 		if (field_offset)
1965 			*offset0 = *offset1 + field_offset * ps;
1966 		else
1967 			*offset0 = *offset1;
1968 		*row_inc = pixinc(screen_width * (fbh * x_predecim - 1) +
1969 				y_predecim + (fieldmode ? 1 : 0), ps);
1970 		*pix_inc = pixinc(-x_predecim * screen_width, ps);
1971 		break;
1972 	case OMAP_DSS_ROT_180:
1973 		*offset1 = (screen_width * (fbh - 1) + fbw - 1) * ps;
1974 		if (field_offset)
1975 			*offset0 = *offset1 - field_offset * screen_width * ps;
1976 		else
1977 			*offset0 = *offset1;
1978 		*row_inc = pixinc(-1 -
1979 			(y_predecim * screen_width - fbw * x_predecim) -
1980 			(fieldmode ? screen_width : 0),	ps);
1981 		if (color_mode == OMAP_DSS_COLOR_YUV2 ||
1982 			color_mode == OMAP_DSS_COLOR_UYVY)
1983 			*pix_inc = pixinc(-x_predecim, 2 * ps);
1984 		else
1985 			*pix_inc = pixinc(-x_predecim, ps);
1986 		break;
1987 	case OMAP_DSS_ROT_270:
1988 		*offset1 = (fbw - 1) * ps;
1989 		if (field_offset)
1990 			*offset0 = *offset1 - field_offset * ps;
1991 		else
1992 			*offset0 = *offset1;
1993 		*row_inc = pixinc(-screen_width * (fbh * x_predecim - 1) -
1994 				y_predecim - (fieldmode ? 1 : 0), ps);
1995 		*pix_inc = pixinc(x_predecim * screen_width, ps);
1996 		break;
1997 
1998 	/* mirroring */
1999 	case OMAP_DSS_ROT_0 + 4:
2000 		*offset1 = (fbw - 1) * ps;
2001 		if (field_offset)
2002 			*offset0 = *offset1 + field_offset * screen_width * ps;
2003 		else
2004 			*offset0 = *offset1;
2005 		*row_inc = pixinc(y_predecim * screen_width * 2 - 1 +
2006 				(fieldmode ? screen_width : 0),
2007 				ps);
2008 		if (color_mode == OMAP_DSS_COLOR_YUV2 ||
2009 			color_mode == OMAP_DSS_COLOR_UYVY)
2010 			*pix_inc = pixinc(-x_predecim, 2 * ps);
2011 		else
2012 			*pix_inc = pixinc(-x_predecim, ps);
2013 		break;
2014 
2015 	case OMAP_DSS_ROT_90 + 4:
2016 		*offset1 = 0;
2017 		if (field_offset)
2018 			*offset0 = *offset1 + field_offset * ps;
2019 		else
2020 			*offset0 = *offset1;
2021 		*row_inc = pixinc(-screen_width * (fbh * x_predecim - 1) +
2022 				y_predecim + (fieldmode ? 1 : 0),
2023 				ps);
2024 		*pix_inc = pixinc(x_predecim * screen_width, ps);
2025 		break;
2026 
2027 	case OMAP_DSS_ROT_180 + 4:
2028 		*offset1 = screen_width * (fbh - 1) * ps;
2029 		if (field_offset)
2030 			*offset0 = *offset1 - field_offset * screen_width * ps;
2031 		else
2032 			*offset0 = *offset1;
2033 		*row_inc = pixinc(1 - y_predecim * screen_width * 2 -
2034 				(fieldmode ? screen_width : 0),
2035 				ps);
2036 		if (color_mode == OMAP_DSS_COLOR_YUV2 ||
2037 			color_mode == OMAP_DSS_COLOR_UYVY)
2038 			*pix_inc = pixinc(x_predecim, 2 * ps);
2039 		else
2040 			*pix_inc = pixinc(x_predecim, ps);
2041 		break;
2042 
2043 	case OMAP_DSS_ROT_270 + 4:
2044 		*offset1 = (screen_width * (fbh - 1) + fbw - 1) * ps;
2045 		if (field_offset)
2046 			*offset0 = *offset1 - field_offset * ps;
2047 		else
2048 			*offset0 = *offset1;
2049 		*row_inc = pixinc(screen_width * (fbh * x_predecim - 1) -
2050 				y_predecim - (fieldmode ? 1 : 0),
2051 				ps);
2052 		*pix_inc = pixinc(-x_predecim * screen_width, ps);
2053 		break;
2054 
2055 	default:
2056 		BUG();
2057 		return;
2058 	}
2059 }
2060 
2061 static void calc_tiler_rotation_offset(u16 screen_width, u16 width,
2062 		enum omap_color_mode color_mode, bool fieldmode,
2063 		unsigned int field_offset, unsigned *offset0, unsigned *offset1,
2064 		s32 *row_inc, s32 *pix_inc, int x_predecim, int y_predecim)
2065 {
2066 	u8 ps;
2067 
2068 	switch (color_mode) {
2069 	case OMAP_DSS_COLOR_CLUT1:
2070 	case OMAP_DSS_COLOR_CLUT2:
2071 	case OMAP_DSS_COLOR_CLUT4:
2072 	case OMAP_DSS_COLOR_CLUT8:
2073 		BUG();
2074 		return;
2075 	default:
2076 		ps = color_mode_to_bpp(color_mode) / 8;
2077 		break;
2078 	}
2079 
2080 	DSSDBG("scrw %d, width %d\n", screen_width, width);
2081 
2082 	/*
2083 	 * field 0 = even field = bottom field
2084 	 * field 1 = odd field = top field
2085 	 */
2086 	*offset1 = 0;
2087 	if (field_offset)
2088 		*offset0 = *offset1 + field_offset * screen_width * ps;
2089 	else
2090 		*offset0 = *offset1;
2091 	*row_inc = pixinc(1 + (y_predecim * screen_width - width * x_predecim) +
2092 			(fieldmode ? screen_width : 0), ps);
2093 	if (color_mode == OMAP_DSS_COLOR_YUV2 ||
2094 		color_mode == OMAP_DSS_COLOR_UYVY)
2095 		*pix_inc = pixinc(x_predecim, 2 * ps);
2096 	else
2097 		*pix_inc = pixinc(x_predecim, ps);
2098 }
2099 
2100 /*
2101  * This function is used to avoid synclosts in OMAP3, because of some
2102  * undocumented horizontal position and timing related limitations.
2103  */
2104 static int check_horiz_timing_omap3(unsigned long pclk, unsigned long lclk,
2105 		const struct omap_video_timings *t, u16 pos_x,
2106 		u16 width, u16 height, u16 out_width, u16 out_height,
2107 		bool five_taps)
2108 {
2109 	const int ds = DIV_ROUND_UP(height, out_height);
2110 	unsigned long nonactive;
2111 	static const u8 limits[3] = { 8, 10, 20 };
2112 	u64 val, blank;
2113 	int i;
2114 
2115 	nonactive = t->x_res + t->hfp + t->hsw + t->hbp - out_width;
2116 
2117 	i = 0;
2118 	if (out_height < height)
2119 		i++;
2120 	if (out_width < width)
2121 		i++;
2122 	blank = div_u64((u64)(t->hbp + t->hsw + t->hfp) * lclk, pclk);
2123 	DSSDBG("blanking period + ppl = %llu (limit = %u)\n", blank, limits[i]);
2124 	if (blank <= limits[i])
2125 		return -EINVAL;
2126 
2127 	/* FIXME add checks for 3-tap filter once the limitations are known */
2128 	if (!five_taps)
2129 		return 0;
2130 
2131 	/*
2132 	 * Pixel data should be prepared before visible display point starts.
2133 	 * So, atleast DS-2 lines must have already been fetched by DISPC
2134 	 * during nonactive - pos_x period.
2135 	 */
2136 	val = div_u64((u64)(nonactive - pos_x) * lclk, pclk);
2137 	DSSDBG("(nonactive - pos_x) * pcd = %llu max(0, DS - 2) * width = %d\n",
2138 		val, max(0, ds - 2) * width);
2139 	if (val < max(0, ds - 2) * width)
2140 		return -EINVAL;
2141 
2142 	/*
2143 	 * All lines need to be refilled during the nonactive period of which
2144 	 * only one line can be loaded during the active period. So, atleast
2145 	 * DS - 1 lines should be loaded during nonactive period.
2146 	 */
2147 	val =  div_u64((u64)nonactive * lclk, pclk);
2148 	DSSDBG("nonactive * pcd  = %llu, max(0, DS - 1) * width = %d\n",
2149 		val, max(0, ds - 1) * width);
2150 	if (val < max(0, ds - 1) * width)
2151 		return -EINVAL;
2152 
2153 	return 0;
2154 }
2155 
2156 static unsigned long calc_core_clk_five_taps(unsigned long pclk,
2157 		const struct omap_video_timings *mgr_timings, u16 width,
2158 		u16 height, u16 out_width, u16 out_height,
2159 		enum omap_color_mode color_mode)
2160 {
2161 	u32 core_clk = 0;
2162 	u64 tmp;
2163 
2164 	if (height <= out_height && width <= out_width)
2165 		return (unsigned long) pclk;
2166 
2167 	if (height > out_height) {
2168 		unsigned int ppl = mgr_timings->x_res;
2169 
2170 		tmp = (u64)pclk * height * out_width;
2171 		do_div(tmp, 2 * out_height * ppl);
2172 		core_clk = tmp;
2173 
2174 		if (height > 2 * out_height) {
2175 			if (ppl == out_width)
2176 				return 0;
2177 
2178 			tmp = (u64)pclk * (height - 2 * out_height) * out_width;
2179 			do_div(tmp, 2 * out_height * (ppl - out_width));
2180 			core_clk = max_t(u32, core_clk, tmp);
2181 		}
2182 	}
2183 
2184 	if (width > out_width) {
2185 		tmp = (u64)pclk * width;
2186 		do_div(tmp, out_width);
2187 		core_clk = max_t(u32, core_clk, tmp);
2188 
2189 		if (color_mode == OMAP_DSS_COLOR_RGB24U)
2190 			core_clk <<= 1;
2191 	}
2192 
2193 	return core_clk;
2194 }
2195 
2196 static unsigned long calc_core_clk_24xx(unsigned long pclk, u16 width,
2197 		u16 height, u16 out_width, u16 out_height, bool mem_to_mem)
2198 {
2199 	if (height > out_height && width > out_width)
2200 		return pclk * 4;
2201 	else
2202 		return pclk * 2;
2203 }
2204 
2205 static unsigned long calc_core_clk_34xx(unsigned long pclk, u16 width,
2206 		u16 height, u16 out_width, u16 out_height, bool mem_to_mem)
2207 {
2208 	unsigned int hf, vf;
2209 
2210 	/*
2211 	 * FIXME how to determine the 'A' factor
2212 	 * for the no downscaling case ?
2213 	 */
2214 
2215 	if (width > 3 * out_width)
2216 		hf = 4;
2217 	else if (width > 2 * out_width)
2218 		hf = 3;
2219 	else if (width > out_width)
2220 		hf = 2;
2221 	else
2222 		hf = 1;
2223 	if (height > out_height)
2224 		vf = 2;
2225 	else
2226 		vf = 1;
2227 
2228 	return pclk * vf * hf;
2229 }
2230 
2231 static unsigned long calc_core_clk_44xx(unsigned long pclk, u16 width,
2232 		u16 height, u16 out_width, u16 out_height, bool mem_to_mem)
2233 {
2234 	/*
2235 	 * If the overlay/writeback is in mem to mem mode, there are no
2236 	 * downscaling limitations with respect to pixel clock, return 1 as
2237 	 * required core clock to represent that we have sufficient enough
2238 	 * core clock to do maximum downscaling
2239 	 */
2240 	if (mem_to_mem)
2241 		return 1;
2242 
2243 	if (width > out_width)
2244 		return DIV_ROUND_UP(pclk, out_width) * width;
2245 	else
2246 		return pclk;
2247 }
2248 
2249 static int dispc_ovl_calc_scaling_24xx(unsigned long pclk, unsigned long lclk,
2250 		const struct omap_video_timings *mgr_timings,
2251 		u16 width, u16 height, u16 out_width, u16 out_height,
2252 		enum omap_color_mode color_mode, bool *five_taps,
2253 		int *x_predecim, int *y_predecim, int *decim_x, int *decim_y,
2254 		u16 pos_x, unsigned long *core_clk, bool mem_to_mem)
2255 {
2256 	int error;
2257 	u16 in_width, in_height;
2258 	int min_factor = min(*decim_x, *decim_y);
2259 	const int maxsinglelinewidth =
2260 			dss_feat_get_param_max(FEAT_PARAM_LINEWIDTH);
2261 
2262 	*five_taps = false;
2263 
2264 	do {
2265 		in_height = height / *decim_y;
2266 		in_width = width / *decim_x;
2267 		*core_clk = dispc.feat->calc_core_clk(pclk, in_width,
2268 				in_height, out_width, out_height, mem_to_mem);
2269 		error = (in_width > maxsinglelinewidth || !*core_clk ||
2270 			*core_clk > dispc_core_clk_rate());
2271 		if (error) {
2272 			if (*decim_x == *decim_y) {
2273 				*decim_x = min_factor;
2274 				++*decim_y;
2275 			} else {
2276 				swap(*decim_x, *decim_y);
2277 				if (*decim_x < *decim_y)
2278 					++*decim_x;
2279 			}
2280 		}
2281 	} while (*decim_x <= *x_predecim && *decim_y <= *y_predecim && error);
2282 
2283 	if (error) {
2284 		DSSERR("failed to find scaling settings\n");
2285 		return -EINVAL;
2286 	}
2287 
2288 	if (in_width > maxsinglelinewidth) {
2289 		DSSERR("Cannot scale max input width exceeded");
2290 		return -EINVAL;
2291 	}
2292 	return 0;
2293 }
2294 
2295 static int dispc_ovl_calc_scaling_34xx(unsigned long pclk, unsigned long lclk,
2296 		const struct omap_video_timings *mgr_timings,
2297 		u16 width, u16 height, u16 out_width, u16 out_height,
2298 		enum omap_color_mode color_mode, bool *five_taps,
2299 		int *x_predecim, int *y_predecim, int *decim_x, int *decim_y,
2300 		u16 pos_x, unsigned long *core_clk, bool mem_to_mem)
2301 {
2302 	int error;
2303 	u16 in_width, in_height;
2304 	const int maxsinglelinewidth =
2305 			dss_feat_get_param_max(FEAT_PARAM_LINEWIDTH);
2306 
2307 	do {
2308 		in_height = height / *decim_y;
2309 		in_width = width / *decim_x;
2310 		*five_taps = in_height > out_height;
2311 
2312 		if (in_width > maxsinglelinewidth)
2313 			if (in_height > out_height &&
2314 						in_height < out_height * 2)
2315 				*five_taps = false;
2316 again:
2317 		if (*five_taps)
2318 			*core_clk = calc_core_clk_five_taps(pclk, mgr_timings,
2319 						in_width, in_height, out_width,
2320 						out_height, color_mode);
2321 		else
2322 			*core_clk = dispc.feat->calc_core_clk(pclk, in_width,
2323 					in_height, out_width, out_height,
2324 					mem_to_mem);
2325 
2326 		error = check_horiz_timing_omap3(pclk, lclk, mgr_timings,
2327 				pos_x, in_width, in_height, out_width,
2328 				out_height, *five_taps);
2329 		if (error && *five_taps) {
2330 			*five_taps = false;
2331 			goto again;
2332 		}
2333 
2334 		error = (error || in_width > maxsinglelinewidth * 2 ||
2335 			(in_width > maxsinglelinewidth && *five_taps) ||
2336 			!*core_clk || *core_clk > dispc_core_clk_rate());
2337 
2338 		if (!error) {
2339 			/* verify that we're inside the limits of scaler */
2340 			if (in_width / 4 > out_width)
2341 					error = 1;
2342 
2343 			if (*five_taps) {
2344 				if (in_height / 4 > out_height)
2345 					error = 1;
2346 			} else {
2347 				if (in_height / 2 > out_height)
2348 					error = 1;
2349 			}
2350 		}
2351 
2352 		if (error)
2353 			++*decim_y;
2354 	} while (*decim_x <= *x_predecim && *decim_y <= *y_predecim && error);
2355 
2356 	if (error) {
2357 		DSSERR("failed to find scaling settings\n");
2358 		return -EINVAL;
2359 	}
2360 
2361 	if (check_horiz_timing_omap3(pclk, lclk, mgr_timings, pos_x, in_width,
2362 				in_height, out_width, out_height, *five_taps)) {
2363 			DSSERR("horizontal timing too tight\n");
2364 			return -EINVAL;
2365 	}
2366 
2367 	if (in_width > (maxsinglelinewidth * 2)) {
2368 		DSSERR("Cannot setup scaling");
2369 		DSSERR("width exceeds maximum width possible");
2370 		return -EINVAL;
2371 	}
2372 
2373 	if (in_width > maxsinglelinewidth && *five_taps) {
2374 		DSSERR("cannot setup scaling with five taps");
2375 		return -EINVAL;
2376 	}
2377 	return 0;
2378 }
2379 
2380 static int dispc_ovl_calc_scaling_44xx(unsigned long pclk, unsigned long lclk,
2381 		const struct omap_video_timings *mgr_timings,
2382 		u16 width, u16 height, u16 out_width, u16 out_height,
2383 		enum omap_color_mode color_mode, bool *five_taps,
2384 		int *x_predecim, int *y_predecim, int *decim_x, int *decim_y,
2385 		u16 pos_x, unsigned long *core_clk, bool mem_to_mem)
2386 {
2387 	u16 in_width, in_width_max;
2388 	int decim_x_min = *decim_x;
2389 	u16 in_height = height / *decim_y;
2390 	const int maxsinglelinewidth =
2391 				dss_feat_get_param_max(FEAT_PARAM_LINEWIDTH);
2392 	const int maxdownscale = dss_feat_get_param_max(FEAT_PARAM_DOWNSCALE);
2393 
2394 	if (mem_to_mem) {
2395 		in_width_max = out_width * maxdownscale;
2396 	} else {
2397 		in_width_max = dispc_core_clk_rate() /
2398 					DIV_ROUND_UP(pclk, out_width);
2399 	}
2400 
2401 	*decim_x = DIV_ROUND_UP(width, in_width_max);
2402 
2403 	*decim_x = *decim_x > decim_x_min ? *decim_x : decim_x_min;
2404 	if (*decim_x > *x_predecim)
2405 		return -EINVAL;
2406 
2407 	do {
2408 		in_width = width / *decim_x;
2409 	} while (*decim_x <= *x_predecim &&
2410 			in_width > maxsinglelinewidth && ++*decim_x);
2411 
2412 	if (in_width > maxsinglelinewidth) {
2413 		DSSERR("Cannot scale width exceeds max line width");
2414 		return -EINVAL;
2415 	}
2416 
2417 	*core_clk = dispc.feat->calc_core_clk(pclk, in_width, in_height,
2418 				out_width, out_height, mem_to_mem);
2419 	return 0;
2420 }
2421 
2422 #define DIV_FRAC(dividend, divisor) \
2423 	((dividend) * 100 / (divisor) - ((dividend) / (divisor) * 100))
2424 
2425 static int dispc_ovl_calc_scaling(unsigned long pclk, unsigned long lclk,
2426 		enum omap_overlay_caps caps,
2427 		const struct omap_video_timings *mgr_timings,
2428 		u16 width, u16 height, u16 out_width, u16 out_height,
2429 		enum omap_color_mode color_mode, bool *five_taps,
2430 		int *x_predecim, int *y_predecim, u16 pos_x,
2431 		enum omap_dss_rotation_type rotation_type, bool mem_to_mem)
2432 {
2433 	const int maxdownscale = dss_feat_get_param_max(FEAT_PARAM_DOWNSCALE);
2434 	const int max_decim_limit = 16;
2435 	unsigned long core_clk = 0;
2436 	int decim_x, decim_y, ret;
2437 
2438 	if (width == out_width && height == out_height)
2439 		return 0;
2440 
2441 	if (!mem_to_mem && (pclk == 0 || mgr_timings->pixelclock == 0)) {
2442 		DSSERR("cannot calculate scaling settings: pclk is zero\n");
2443 		return -EINVAL;
2444 	}
2445 
2446 	if ((caps & OMAP_DSS_OVL_CAP_SCALE) == 0)
2447 		return -EINVAL;
2448 
2449 	if (mem_to_mem) {
2450 		*x_predecim = *y_predecim = 1;
2451 	} else {
2452 		*x_predecim = max_decim_limit;
2453 		*y_predecim = (rotation_type == OMAP_DSS_ROT_TILER &&
2454 				dss_has_feature(FEAT_BURST_2D)) ?
2455 				2 : max_decim_limit;
2456 	}
2457 
2458 	if (color_mode == OMAP_DSS_COLOR_CLUT1 ||
2459 	    color_mode == OMAP_DSS_COLOR_CLUT2 ||
2460 	    color_mode == OMAP_DSS_COLOR_CLUT4 ||
2461 	    color_mode == OMAP_DSS_COLOR_CLUT8) {
2462 		*x_predecim = 1;
2463 		*y_predecim = 1;
2464 		*five_taps = false;
2465 		return 0;
2466 	}
2467 
2468 	decim_x = DIV_ROUND_UP(DIV_ROUND_UP(width, out_width), maxdownscale);
2469 	decim_y = DIV_ROUND_UP(DIV_ROUND_UP(height, out_height), maxdownscale);
2470 
2471 	if (decim_x > *x_predecim || out_width > width * 8)
2472 		return -EINVAL;
2473 
2474 	if (decim_y > *y_predecim || out_height > height * 8)
2475 		return -EINVAL;
2476 
2477 	ret = dispc.feat->calc_scaling(pclk, lclk, mgr_timings, width, height,
2478 		out_width, out_height, color_mode, five_taps,
2479 		x_predecim, y_predecim, &decim_x, &decim_y, pos_x, &core_clk,
2480 		mem_to_mem);
2481 	if (ret)
2482 		return ret;
2483 
2484 	DSSDBG("%dx%d -> %dx%d (%d.%02d x %d.%02d), decim %dx%d %dx%d (%d.%02d x %d.%02d), taps %d, req clk %lu, cur clk %lu\n",
2485 		width, height,
2486 		out_width, out_height,
2487 		out_width / width, DIV_FRAC(out_width, width),
2488 		out_height / height, DIV_FRAC(out_height, height),
2489 
2490 		decim_x, decim_y,
2491 		width / decim_x, height / decim_y,
2492 		out_width / (width / decim_x), DIV_FRAC(out_width, width / decim_x),
2493 		out_height / (height / decim_y), DIV_FRAC(out_height, height / decim_y),
2494 
2495 		*five_taps ? 5 : 3,
2496 		core_clk, dispc_core_clk_rate());
2497 
2498 	if (!core_clk || core_clk > dispc_core_clk_rate()) {
2499 		DSSERR("failed to set up scaling, "
2500 			"required core clk rate = %lu Hz, "
2501 			"current core clk rate = %lu Hz\n",
2502 			core_clk, dispc_core_clk_rate());
2503 		return -EINVAL;
2504 	}
2505 
2506 	*x_predecim = decim_x;
2507 	*y_predecim = decim_y;
2508 	return 0;
2509 }
2510 
2511 int dispc_ovl_check(enum omap_plane plane, enum omap_channel channel,
2512 		const struct omap_overlay_info *oi,
2513 		const struct omap_video_timings *timings,
2514 		int *x_predecim, int *y_predecim)
2515 {
2516 	enum omap_overlay_caps caps = dss_feat_get_overlay_caps(plane);
2517 	bool five_taps = true;
2518 	bool fieldmode = false;
2519 	u16 in_height = oi->height;
2520 	u16 in_width = oi->width;
2521 	bool ilace = timings->interlace;
2522 	u16 out_width, out_height;
2523 	int pos_x = oi->pos_x;
2524 	unsigned long pclk = dispc_mgr_pclk_rate(channel);
2525 	unsigned long lclk = dispc_mgr_lclk_rate(channel);
2526 
2527 	out_width = oi->out_width == 0 ? oi->width : oi->out_width;
2528 	out_height = oi->out_height == 0 ? oi->height : oi->out_height;
2529 
2530 	if (ilace && oi->height == out_height)
2531 		fieldmode = true;
2532 
2533 	if (ilace) {
2534 		if (fieldmode)
2535 			in_height /= 2;
2536 		out_height /= 2;
2537 
2538 		DSSDBG("adjusting for ilace: height %d, out_height %d\n",
2539 				in_height, out_height);
2540 	}
2541 
2542 	if (!dss_feat_color_mode_supported(plane, oi->color_mode))
2543 		return -EINVAL;
2544 
2545 	return dispc_ovl_calc_scaling(pclk, lclk, caps, timings, in_width,
2546 			in_height, out_width, out_height, oi->color_mode,
2547 			&five_taps, x_predecim, y_predecim, pos_x,
2548 			oi->rotation_type, false);
2549 }
2550 EXPORT_SYMBOL(dispc_ovl_check);
2551 
2552 static int dispc_ovl_setup_common(enum omap_plane plane,
2553 		enum omap_overlay_caps caps, u32 paddr, u32 p_uv_addr,
2554 		u16 screen_width, int pos_x, int pos_y, u16 width, u16 height,
2555 		u16 out_width, u16 out_height, enum omap_color_mode color_mode,
2556 		u8 rotation, bool mirror, u8 zorder, u8 pre_mult_alpha,
2557 		u8 global_alpha, enum omap_dss_rotation_type rotation_type,
2558 		bool replication, const struct omap_video_timings *mgr_timings,
2559 		bool mem_to_mem)
2560 {
2561 	bool five_taps = true;
2562 	bool fieldmode = false;
2563 	int r, cconv = 0;
2564 	unsigned offset0, offset1;
2565 	s32 row_inc;
2566 	s32 pix_inc;
2567 	u16 frame_width, frame_height;
2568 	unsigned int field_offset = 0;
2569 	u16 in_height = height;
2570 	u16 in_width = width;
2571 	int x_predecim = 1, y_predecim = 1;
2572 	bool ilace = mgr_timings->interlace;
2573 	unsigned long pclk = dispc_plane_pclk_rate(plane);
2574 	unsigned long lclk = dispc_plane_lclk_rate(plane);
2575 
2576 	if (paddr == 0 && rotation_type != OMAP_DSS_ROT_TILER)
2577 		return -EINVAL;
2578 
2579 	switch (color_mode) {
2580 	case OMAP_DSS_COLOR_YUV2:
2581 	case OMAP_DSS_COLOR_UYVY:
2582 	case OMAP_DSS_COLOR_NV12:
2583 		if (in_width & 1) {
2584 			DSSERR("input width %d is not even for YUV format\n",
2585 				in_width);
2586 			return -EINVAL;
2587 		}
2588 		break;
2589 
2590 	default:
2591 		break;
2592 	}
2593 
2594 	out_width = out_width == 0 ? width : out_width;
2595 	out_height = out_height == 0 ? height : out_height;
2596 
2597 	if (ilace && height == out_height)
2598 		fieldmode = true;
2599 
2600 	if (ilace) {
2601 		if (fieldmode)
2602 			in_height /= 2;
2603 		pos_y /= 2;
2604 		out_height /= 2;
2605 
2606 		DSSDBG("adjusting for ilace: height %d, pos_y %d, "
2607 			"out_height %d\n", in_height, pos_y,
2608 			out_height);
2609 	}
2610 
2611 	if (!dss_feat_color_mode_supported(plane, color_mode))
2612 		return -EINVAL;
2613 
2614 	r = dispc_ovl_calc_scaling(pclk, lclk, caps, mgr_timings, in_width,
2615 			in_height, out_width, out_height, color_mode,
2616 			&five_taps, &x_predecim, &y_predecim, pos_x,
2617 			rotation_type, mem_to_mem);
2618 	if (r)
2619 		return r;
2620 
2621 	in_width = in_width / x_predecim;
2622 	in_height = in_height / y_predecim;
2623 
2624 	if (x_predecim > 1 || y_predecim > 1)
2625 		DSSDBG("predecimation %d x %x, new input size %d x %d\n",
2626 			x_predecim, y_predecim, in_width, in_height);
2627 
2628 	switch (color_mode) {
2629 	case OMAP_DSS_COLOR_YUV2:
2630 	case OMAP_DSS_COLOR_UYVY:
2631 	case OMAP_DSS_COLOR_NV12:
2632 		if (in_width & 1) {
2633 			DSSDBG("predecimated input width is not even for YUV format\n");
2634 			DSSDBG("adjusting input width %d -> %d\n",
2635 				in_width, in_width & ~1);
2636 
2637 			in_width &= ~1;
2638 		}
2639 		break;
2640 
2641 	default:
2642 		break;
2643 	}
2644 
2645 	if (color_mode == OMAP_DSS_COLOR_YUV2 ||
2646 			color_mode == OMAP_DSS_COLOR_UYVY ||
2647 			color_mode == OMAP_DSS_COLOR_NV12)
2648 		cconv = 1;
2649 
2650 	if (ilace && !fieldmode) {
2651 		/*
2652 		 * when downscaling the bottom field may have to start several
2653 		 * source lines below the top field. Unfortunately ACCUI
2654 		 * registers will only hold the fractional part of the offset
2655 		 * so the integer part must be added to the base address of the
2656 		 * bottom field.
2657 		 */
2658 		if (!in_height || in_height == out_height)
2659 			field_offset = 0;
2660 		else
2661 			field_offset = in_height / out_height / 2;
2662 	}
2663 
2664 	/* Fields are independent but interleaved in memory. */
2665 	if (fieldmode)
2666 		field_offset = 1;
2667 
2668 	offset0 = 0;
2669 	offset1 = 0;
2670 	row_inc = 0;
2671 	pix_inc = 0;
2672 
2673 	if (plane == OMAP_DSS_WB) {
2674 		frame_width = out_width;
2675 		frame_height = out_height;
2676 	} else {
2677 		frame_width = in_width;
2678 		frame_height = height;
2679 	}
2680 
2681 	if (rotation_type == OMAP_DSS_ROT_TILER)
2682 		calc_tiler_rotation_offset(screen_width, frame_width,
2683 				color_mode, fieldmode, field_offset,
2684 				&offset0, &offset1, &row_inc, &pix_inc,
2685 				x_predecim, y_predecim);
2686 	else if (rotation_type == OMAP_DSS_ROT_DMA)
2687 		calc_dma_rotation_offset(rotation, mirror, screen_width,
2688 				frame_width, frame_height,
2689 				color_mode, fieldmode, field_offset,
2690 				&offset0, &offset1, &row_inc, &pix_inc,
2691 				x_predecim, y_predecim);
2692 	else
2693 		calc_vrfb_rotation_offset(rotation, mirror,
2694 				screen_width, frame_width, frame_height,
2695 				color_mode, fieldmode, field_offset,
2696 				&offset0, &offset1, &row_inc, &pix_inc,
2697 				x_predecim, y_predecim);
2698 
2699 	DSSDBG("offset0 %u, offset1 %u, row_inc %d, pix_inc %d\n",
2700 			offset0, offset1, row_inc, pix_inc);
2701 
2702 	dispc_ovl_set_color_mode(plane, color_mode);
2703 
2704 	dispc_ovl_configure_burst_type(plane, rotation_type);
2705 
2706 	dispc_ovl_set_ba0(plane, paddr + offset0);
2707 	dispc_ovl_set_ba1(plane, paddr + offset1);
2708 
2709 	if (OMAP_DSS_COLOR_NV12 == color_mode) {
2710 		dispc_ovl_set_ba0_uv(plane, p_uv_addr + offset0);
2711 		dispc_ovl_set_ba1_uv(plane, p_uv_addr + offset1);
2712 	}
2713 
2714 	if (dispc.feat->last_pixel_inc_missing)
2715 		row_inc += pix_inc - 1;
2716 
2717 	dispc_ovl_set_row_inc(plane, row_inc);
2718 	dispc_ovl_set_pix_inc(plane, pix_inc);
2719 
2720 	DSSDBG("%d,%d %dx%d -> %dx%d\n", pos_x, pos_y, in_width,
2721 			in_height, out_width, out_height);
2722 
2723 	dispc_ovl_set_pos(plane, caps, pos_x, pos_y);
2724 
2725 	dispc_ovl_set_input_size(plane, in_width, in_height);
2726 
2727 	if (caps & OMAP_DSS_OVL_CAP_SCALE) {
2728 		dispc_ovl_set_scaling(plane, in_width, in_height, out_width,
2729 				   out_height, ilace, five_taps, fieldmode,
2730 				   color_mode, rotation);
2731 		dispc_ovl_set_output_size(plane, out_width, out_height);
2732 		dispc_ovl_set_vid_color_conv(plane, cconv);
2733 	}
2734 
2735 	dispc_ovl_set_rotation_attrs(plane, rotation, rotation_type, mirror,
2736 			color_mode);
2737 
2738 	dispc_ovl_set_zorder(plane, caps, zorder);
2739 	dispc_ovl_set_pre_mult_alpha(plane, caps, pre_mult_alpha);
2740 	dispc_ovl_setup_global_alpha(plane, caps, global_alpha);
2741 
2742 	dispc_ovl_enable_replication(plane, caps, replication);
2743 
2744 	return 0;
2745 }
2746 
2747 int dispc_ovl_setup(enum omap_plane plane, const struct omap_overlay_info *oi,
2748 		bool replication, const struct omap_video_timings *mgr_timings,
2749 		bool mem_to_mem)
2750 {
2751 	int r;
2752 	enum omap_overlay_caps caps = dss_feat_get_overlay_caps(plane);
2753 	enum omap_channel channel;
2754 
2755 	channel = dispc_ovl_get_channel_out(plane);
2756 
2757 	DSSDBG("dispc_ovl_setup %d, pa %pad, pa_uv %pad, sw %d, %d,%d, %dx%d ->"
2758 		" %dx%d, cmode %x, rot %d, mir %d, chan %d repl %d\n",
2759 		plane, &oi->paddr, &oi->p_uv_addr, oi->screen_width, oi->pos_x,
2760 		oi->pos_y, oi->width, oi->height, oi->out_width, oi->out_height,
2761 		oi->color_mode, oi->rotation, oi->mirror, channel, replication);
2762 
2763 	r = dispc_ovl_setup_common(plane, caps, oi->paddr, oi->p_uv_addr,
2764 		oi->screen_width, oi->pos_x, oi->pos_y, oi->width, oi->height,
2765 		oi->out_width, oi->out_height, oi->color_mode, oi->rotation,
2766 		oi->mirror, oi->zorder, oi->pre_mult_alpha, oi->global_alpha,
2767 		oi->rotation_type, replication, mgr_timings, mem_to_mem);
2768 
2769 	return r;
2770 }
2771 EXPORT_SYMBOL(dispc_ovl_setup);
2772 
2773 int dispc_ovl_enable(enum omap_plane plane, bool enable)
2774 {
2775 	DSSDBG("dispc_enable_plane %d, %d\n", plane, enable);
2776 
2777 	REG_FLD_MOD(DISPC_OVL_ATTRIBUTES(plane), enable ? 1 : 0, 0, 0);
2778 
2779 	return 0;
2780 }
2781 EXPORT_SYMBOL(dispc_ovl_enable);
2782 
2783 bool dispc_ovl_enabled(enum omap_plane plane)
2784 {
2785 	return REG_GET(DISPC_OVL_ATTRIBUTES(plane), 0, 0);
2786 }
2787 EXPORT_SYMBOL(dispc_ovl_enabled);
2788 
2789 void dispc_mgr_enable(enum omap_channel channel, bool enable)
2790 {
2791 	mgr_fld_write(channel, DISPC_MGR_FLD_ENABLE, enable);
2792 	/* flush posted write */
2793 	mgr_fld_read(channel, DISPC_MGR_FLD_ENABLE);
2794 }
2795 EXPORT_SYMBOL(dispc_mgr_enable);
2796 
2797 bool dispc_mgr_is_enabled(enum omap_channel channel)
2798 {
2799 	return !!mgr_fld_read(channel, DISPC_MGR_FLD_ENABLE);
2800 }
2801 EXPORT_SYMBOL(dispc_mgr_is_enabled);
2802 
2803 static void dispc_lcd_enable_signal_polarity(bool act_high)
2804 {
2805 	if (!dss_has_feature(FEAT_LCDENABLEPOL))
2806 		return;
2807 
2808 	REG_FLD_MOD(DISPC_CONTROL, act_high ? 1 : 0, 29, 29);
2809 }
2810 
2811 void dispc_lcd_enable_signal(bool enable)
2812 {
2813 	if (!dss_has_feature(FEAT_LCDENABLESIGNAL))
2814 		return;
2815 
2816 	REG_FLD_MOD(DISPC_CONTROL, enable ? 1 : 0, 28, 28);
2817 }
2818 
2819 void dispc_pck_free_enable(bool enable)
2820 {
2821 	if (!dss_has_feature(FEAT_PCKFREEENABLE))
2822 		return;
2823 
2824 	REG_FLD_MOD(DISPC_CONTROL, enable ? 1 : 0, 27, 27);
2825 }
2826 
2827 static void dispc_mgr_enable_fifohandcheck(enum omap_channel channel, bool enable)
2828 {
2829 	mgr_fld_write(channel, DISPC_MGR_FLD_FIFOHANDCHECK, enable);
2830 }
2831 
2832 
2833 static void dispc_mgr_set_lcd_type_tft(enum omap_channel channel)
2834 {
2835 	mgr_fld_write(channel, DISPC_MGR_FLD_STNTFT, 1);
2836 }
2837 
2838 static void dispc_set_loadmode(enum omap_dss_load_mode mode)
2839 {
2840 	REG_FLD_MOD(DISPC_CONFIG, mode, 2, 1);
2841 }
2842 
2843 
2844 static void dispc_mgr_set_default_color(enum omap_channel channel, u32 color)
2845 {
2846 	dispc_write_reg(DISPC_DEFAULT_COLOR(channel), color);
2847 }
2848 
2849 static void dispc_mgr_set_trans_key(enum omap_channel ch,
2850 		enum omap_dss_trans_key_type type,
2851 		u32 trans_key)
2852 {
2853 	mgr_fld_write(ch, DISPC_MGR_FLD_TCKSELECTION, type);
2854 
2855 	dispc_write_reg(DISPC_TRANS_COLOR(ch), trans_key);
2856 }
2857 
2858 static void dispc_mgr_enable_trans_key(enum omap_channel ch, bool enable)
2859 {
2860 	mgr_fld_write(ch, DISPC_MGR_FLD_TCKENABLE, enable);
2861 }
2862 
2863 static void dispc_mgr_enable_alpha_fixed_zorder(enum omap_channel ch,
2864 		bool enable)
2865 {
2866 	if (!dss_has_feature(FEAT_ALPHA_FIXED_ZORDER))
2867 		return;
2868 
2869 	if (ch == OMAP_DSS_CHANNEL_LCD)
2870 		REG_FLD_MOD(DISPC_CONFIG, enable, 18, 18);
2871 	else if (ch == OMAP_DSS_CHANNEL_DIGIT)
2872 		REG_FLD_MOD(DISPC_CONFIG, enable, 19, 19);
2873 }
2874 
2875 void dispc_mgr_setup(enum omap_channel channel,
2876 		const struct omap_overlay_manager_info *info)
2877 {
2878 	dispc_mgr_set_default_color(channel, info->default_color);
2879 	dispc_mgr_set_trans_key(channel, info->trans_key_type, info->trans_key);
2880 	dispc_mgr_enable_trans_key(channel, info->trans_enabled);
2881 	dispc_mgr_enable_alpha_fixed_zorder(channel,
2882 			info->partial_alpha_enabled);
2883 	if (dss_has_feature(FEAT_CPR)) {
2884 		dispc_mgr_enable_cpr(channel, info->cpr_enable);
2885 		dispc_mgr_set_cpr_coef(channel, &info->cpr_coefs);
2886 	}
2887 }
2888 EXPORT_SYMBOL(dispc_mgr_setup);
2889 
2890 static void dispc_mgr_set_tft_data_lines(enum omap_channel channel, u8 data_lines)
2891 {
2892 	int code;
2893 
2894 	switch (data_lines) {
2895 	case 12:
2896 		code = 0;
2897 		break;
2898 	case 16:
2899 		code = 1;
2900 		break;
2901 	case 18:
2902 		code = 2;
2903 		break;
2904 	case 24:
2905 		code = 3;
2906 		break;
2907 	default:
2908 		BUG();
2909 		return;
2910 	}
2911 
2912 	mgr_fld_write(channel, DISPC_MGR_FLD_TFTDATALINES, code);
2913 }
2914 
2915 static void dispc_mgr_set_io_pad_mode(enum dss_io_pad_mode mode)
2916 {
2917 	u32 l;
2918 	int gpout0, gpout1;
2919 
2920 	switch (mode) {
2921 	case DSS_IO_PAD_MODE_RESET:
2922 		gpout0 = 0;
2923 		gpout1 = 0;
2924 		break;
2925 	case DSS_IO_PAD_MODE_RFBI:
2926 		gpout0 = 1;
2927 		gpout1 = 0;
2928 		break;
2929 	case DSS_IO_PAD_MODE_BYPASS:
2930 		gpout0 = 1;
2931 		gpout1 = 1;
2932 		break;
2933 	default:
2934 		BUG();
2935 		return;
2936 	}
2937 
2938 	l = dispc_read_reg(DISPC_CONTROL);
2939 	l = FLD_MOD(l, gpout0, 15, 15);
2940 	l = FLD_MOD(l, gpout1, 16, 16);
2941 	dispc_write_reg(DISPC_CONTROL, l);
2942 }
2943 
2944 static void dispc_mgr_enable_stallmode(enum omap_channel channel, bool enable)
2945 {
2946 	mgr_fld_write(channel, DISPC_MGR_FLD_STALLMODE, enable);
2947 }
2948 
2949 void dispc_mgr_set_lcd_config(enum omap_channel channel,
2950 		const struct dss_lcd_mgr_config *config)
2951 {
2952 	dispc_mgr_set_io_pad_mode(config->io_pad_mode);
2953 
2954 	dispc_mgr_enable_stallmode(channel, config->stallmode);
2955 	dispc_mgr_enable_fifohandcheck(channel, config->fifohandcheck);
2956 
2957 	dispc_mgr_set_clock_div(channel, &config->clock_info);
2958 
2959 	dispc_mgr_set_tft_data_lines(channel, config->video_port_width);
2960 
2961 	dispc_lcd_enable_signal_polarity(config->lcden_sig_polarity);
2962 
2963 	dispc_mgr_set_lcd_type_tft(channel);
2964 }
2965 EXPORT_SYMBOL(dispc_mgr_set_lcd_config);
2966 
2967 static bool _dispc_mgr_size_ok(u16 width, u16 height)
2968 {
2969 	return width <= dispc.feat->mgr_width_max &&
2970 		height <= dispc.feat->mgr_height_max;
2971 }
2972 
2973 static bool _dispc_lcd_timings_ok(int hsw, int hfp, int hbp,
2974 		int vsw, int vfp, int vbp)
2975 {
2976 	if (hsw < 1 || hsw > dispc.feat->sw_max ||
2977 			hfp < 1 || hfp > dispc.feat->hp_max ||
2978 			hbp < 1 || hbp > dispc.feat->hp_max ||
2979 			vsw < 1 || vsw > dispc.feat->sw_max ||
2980 			vfp < 0 || vfp > dispc.feat->vp_max ||
2981 			vbp < 0 || vbp > dispc.feat->vp_max)
2982 		return false;
2983 	return true;
2984 }
2985 
2986 static bool _dispc_mgr_pclk_ok(enum omap_channel channel,
2987 		unsigned long pclk)
2988 {
2989 	if (dss_mgr_is_lcd(channel))
2990 		return pclk <= dispc.feat->max_lcd_pclk;
2991 	else
2992 		return pclk <= dispc.feat->max_tv_pclk;
2993 }
2994 
2995 bool dispc_mgr_timings_ok(enum omap_channel channel,
2996 		const struct omap_video_timings *timings)
2997 {
2998 	if (!_dispc_mgr_size_ok(timings->x_res, timings->y_res))
2999 		return false;
3000 
3001 	if (!_dispc_mgr_pclk_ok(channel, timings->pixelclock))
3002 		return false;
3003 
3004 	if (dss_mgr_is_lcd(channel)) {
3005 		/* TODO: OMAP4+ supports interlace for LCD outputs */
3006 		if (timings->interlace)
3007 			return false;
3008 
3009 		if (!_dispc_lcd_timings_ok(timings->hsw, timings->hfp,
3010 				timings->hbp, timings->vsw, timings->vfp,
3011 				timings->vbp))
3012 			return false;
3013 	}
3014 
3015 	return true;
3016 }
3017 
3018 static void _dispc_mgr_set_lcd_timings(enum omap_channel channel, int hsw,
3019 		int hfp, int hbp, int vsw, int vfp, int vbp,
3020 		enum omap_dss_signal_level vsync_level,
3021 		enum omap_dss_signal_level hsync_level,
3022 		enum omap_dss_signal_edge data_pclk_edge,
3023 		enum omap_dss_signal_level de_level,
3024 		enum omap_dss_signal_edge sync_pclk_edge)
3025 
3026 {
3027 	u32 timing_h, timing_v, l;
3028 	bool onoff, rf, ipc, vs, hs, de;
3029 
3030 	timing_h = FLD_VAL(hsw-1, dispc.feat->sw_start, 0) |
3031 			FLD_VAL(hfp-1, dispc.feat->fp_start, 8) |
3032 			FLD_VAL(hbp-1, dispc.feat->bp_start, 20);
3033 	timing_v = FLD_VAL(vsw-1, dispc.feat->sw_start, 0) |
3034 			FLD_VAL(vfp, dispc.feat->fp_start, 8) |
3035 			FLD_VAL(vbp, dispc.feat->bp_start, 20);
3036 
3037 	dispc_write_reg(DISPC_TIMING_H(channel), timing_h);
3038 	dispc_write_reg(DISPC_TIMING_V(channel), timing_v);
3039 
3040 	switch (vsync_level) {
3041 	case OMAPDSS_SIG_ACTIVE_LOW:
3042 		vs = true;
3043 		break;
3044 	case OMAPDSS_SIG_ACTIVE_HIGH:
3045 		vs = false;
3046 		break;
3047 	default:
3048 		BUG();
3049 	}
3050 
3051 	switch (hsync_level) {
3052 	case OMAPDSS_SIG_ACTIVE_LOW:
3053 		hs = true;
3054 		break;
3055 	case OMAPDSS_SIG_ACTIVE_HIGH:
3056 		hs = false;
3057 		break;
3058 	default:
3059 		BUG();
3060 	}
3061 
3062 	switch (de_level) {
3063 	case OMAPDSS_SIG_ACTIVE_LOW:
3064 		de = true;
3065 		break;
3066 	case OMAPDSS_SIG_ACTIVE_HIGH:
3067 		de = false;
3068 		break;
3069 	default:
3070 		BUG();
3071 	}
3072 
3073 	switch (data_pclk_edge) {
3074 	case OMAPDSS_DRIVE_SIG_RISING_EDGE:
3075 		ipc = false;
3076 		break;
3077 	case OMAPDSS_DRIVE_SIG_FALLING_EDGE:
3078 		ipc = true;
3079 		break;
3080 	default:
3081 		BUG();
3082 	}
3083 
3084 	/* always use the 'rf' setting */
3085 	onoff = true;
3086 
3087 	switch (sync_pclk_edge) {
3088 	case OMAPDSS_DRIVE_SIG_FALLING_EDGE:
3089 		rf = false;
3090 		break;
3091 	case OMAPDSS_DRIVE_SIG_RISING_EDGE:
3092 		rf = true;
3093 		break;
3094 	default:
3095 		BUG();
3096 	}
3097 
3098 	l = FLD_VAL(onoff, 17, 17) |
3099 		FLD_VAL(rf, 16, 16) |
3100 		FLD_VAL(de, 15, 15) |
3101 		FLD_VAL(ipc, 14, 14) |
3102 		FLD_VAL(hs, 13, 13) |
3103 		FLD_VAL(vs, 12, 12);
3104 
3105 	/* always set ALIGN bit when available */
3106 	if (dispc.feat->supports_sync_align)
3107 		l |= (1 << 18);
3108 
3109 	dispc_write_reg(DISPC_POL_FREQ(channel), l);
3110 
3111 	if (dispc.syscon_pol) {
3112 		const int shifts[] = {
3113 			[OMAP_DSS_CHANNEL_LCD] = 0,
3114 			[OMAP_DSS_CHANNEL_LCD2] = 1,
3115 			[OMAP_DSS_CHANNEL_LCD3] = 2,
3116 		};
3117 
3118 		u32 mask, val;
3119 
3120 		mask = (1 << 0) | (1 << 3) | (1 << 6);
3121 		val = (rf << 0) | (ipc << 3) | (onoff << 6);
3122 
3123 		mask <<= 16 + shifts[channel];
3124 		val <<= 16 + shifts[channel];
3125 
3126 		regmap_update_bits(dispc.syscon_pol, dispc.syscon_pol_offset,
3127 			mask, val);
3128 	}
3129 }
3130 
3131 /* change name to mode? */
3132 void dispc_mgr_set_timings(enum omap_channel channel,
3133 		const struct omap_video_timings *timings)
3134 {
3135 	unsigned xtot, ytot;
3136 	unsigned long ht, vt;
3137 	struct omap_video_timings t = *timings;
3138 
3139 	DSSDBG("channel %d xres %u yres %u\n", channel, t.x_res, t.y_res);
3140 
3141 	if (!dispc_mgr_timings_ok(channel, &t)) {
3142 		BUG();
3143 		return;
3144 	}
3145 
3146 	if (dss_mgr_is_lcd(channel)) {
3147 		_dispc_mgr_set_lcd_timings(channel, t.hsw, t.hfp, t.hbp, t.vsw,
3148 				t.vfp, t.vbp, t.vsync_level, t.hsync_level,
3149 				t.data_pclk_edge, t.de_level, t.sync_pclk_edge);
3150 
3151 		xtot = t.x_res + t.hfp + t.hsw + t.hbp;
3152 		ytot = t.y_res + t.vfp + t.vsw + t.vbp;
3153 
3154 		ht = timings->pixelclock / xtot;
3155 		vt = timings->pixelclock / xtot / ytot;
3156 
3157 		DSSDBG("pck %u\n", timings->pixelclock);
3158 		DSSDBG("hsw %d hfp %d hbp %d vsw %d vfp %d vbp %d\n",
3159 			t.hsw, t.hfp, t.hbp, t.vsw, t.vfp, t.vbp);
3160 		DSSDBG("vsync_level %d hsync_level %d data_pclk_edge %d de_level %d sync_pclk_edge %d\n",
3161 			t.vsync_level, t.hsync_level, t.data_pclk_edge,
3162 			t.de_level, t.sync_pclk_edge);
3163 
3164 		DSSDBG("hsync %luHz, vsync %luHz\n", ht, vt);
3165 	} else {
3166 		if (t.interlace)
3167 			t.y_res /= 2;
3168 	}
3169 
3170 	dispc_mgr_set_size(channel, t.x_res, t.y_res);
3171 }
3172 EXPORT_SYMBOL(dispc_mgr_set_timings);
3173 
3174 static void dispc_mgr_set_lcd_divisor(enum omap_channel channel, u16 lck_div,
3175 		u16 pck_div)
3176 {
3177 	BUG_ON(lck_div < 1);
3178 	BUG_ON(pck_div < 1);
3179 
3180 	dispc_write_reg(DISPC_DIVISORo(channel),
3181 			FLD_VAL(lck_div, 23, 16) | FLD_VAL(pck_div, 7, 0));
3182 
3183 	if (!dss_has_feature(FEAT_CORE_CLK_DIV) &&
3184 			channel == OMAP_DSS_CHANNEL_LCD)
3185 		dispc.core_clk_rate = dispc_fclk_rate() / lck_div;
3186 }
3187 
3188 static void dispc_mgr_get_lcd_divisor(enum omap_channel channel, int *lck_div,
3189 		int *pck_div)
3190 {
3191 	u32 l;
3192 	l = dispc_read_reg(DISPC_DIVISORo(channel));
3193 	*lck_div = FLD_GET(l, 23, 16);
3194 	*pck_div = FLD_GET(l, 7, 0);
3195 }
3196 
3197 static unsigned long dispc_fclk_rate(void)
3198 {
3199 	struct dss_pll *pll;
3200 	unsigned long r = 0;
3201 
3202 	switch (dss_get_dispc_clk_source()) {
3203 	case OMAP_DSS_CLK_SRC_FCK:
3204 		r = dss_get_dispc_clk_rate();
3205 		break;
3206 	case OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC:
3207 		pll = dss_pll_find("dsi0");
3208 		if (!pll)
3209 			pll = dss_pll_find("video0");
3210 
3211 		r = pll->cinfo.clkout[0];
3212 		break;
3213 	case OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC:
3214 		pll = dss_pll_find("dsi1");
3215 		if (!pll)
3216 			pll = dss_pll_find("video1");
3217 
3218 		r = pll->cinfo.clkout[0];
3219 		break;
3220 	default:
3221 		BUG();
3222 		return 0;
3223 	}
3224 
3225 	return r;
3226 }
3227 
3228 static unsigned long dispc_mgr_lclk_rate(enum omap_channel channel)
3229 {
3230 	struct dss_pll *pll;
3231 	int lcd;
3232 	unsigned long r;
3233 	u32 l;
3234 
3235 	if (dss_mgr_is_lcd(channel)) {
3236 		l = dispc_read_reg(DISPC_DIVISORo(channel));
3237 
3238 		lcd = FLD_GET(l, 23, 16);
3239 
3240 		switch (dss_get_lcd_clk_source(channel)) {
3241 		case OMAP_DSS_CLK_SRC_FCK:
3242 			r = dss_get_dispc_clk_rate();
3243 			break;
3244 		case OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC:
3245 			pll = dss_pll_find("dsi0");
3246 			if (!pll)
3247 				pll = dss_pll_find("video0");
3248 
3249 			r = pll->cinfo.clkout[0];
3250 			break;
3251 		case OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC:
3252 			pll = dss_pll_find("dsi1");
3253 			if (!pll)
3254 				pll = dss_pll_find("video1");
3255 
3256 			r = pll->cinfo.clkout[0];
3257 			break;
3258 		default:
3259 			BUG();
3260 			return 0;
3261 		}
3262 
3263 		return r / lcd;
3264 	} else {
3265 		return dispc_fclk_rate();
3266 	}
3267 }
3268 
3269 static unsigned long dispc_mgr_pclk_rate(enum omap_channel channel)
3270 {
3271 	unsigned long r;
3272 
3273 	if (dss_mgr_is_lcd(channel)) {
3274 		int pcd;
3275 		u32 l;
3276 
3277 		l = dispc_read_reg(DISPC_DIVISORo(channel));
3278 
3279 		pcd = FLD_GET(l, 7, 0);
3280 
3281 		r = dispc_mgr_lclk_rate(channel);
3282 
3283 		return r / pcd;
3284 	} else {
3285 		return dispc.tv_pclk_rate;
3286 	}
3287 }
3288 
3289 void dispc_set_tv_pclk(unsigned long pclk)
3290 {
3291 	dispc.tv_pclk_rate = pclk;
3292 }
3293 
3294 static unsigned long dispc_core_clk_rate(void)
3295 {
3296 	return dispc.core_clk_rate;
3297 }
3298 
3299 static unsigned long dispc_plane_pclk_rate(enum omap_plane plane)
3300 {
3301 	enum omap_channel channel;
3302 
3303 	if (plane == OMAP_DSS_WB)
3304 		return 0;
3305 
3306 	channel = dispc_ovl_get_channel_out(plane);
3307 
3308 	return dispc_mgr_pclk_rate(channel);
3309 }
3310 
3311 static unsigned long dispc_plane_lclk_rate(enum omap_plane plane)
3312 {
3313 	enum omap_channel channel;
3314 
3315 	if (plane == OMAP_DSS_WB)
3316 		return 0;
3317 
3318 	channel	= dispc_ovl_get_channel_out(plane);
3319 
3320 	return dispc_mgr_lclk_rate(channel);
3321 }
3322 
3323 static void dispc_dump_clocks_channel(struct seq_file *s, enum omap_channel channel)
3324 {
3325 	int lcd, pcd;
3326 	enum omap_dss_clk_source lcd_clk_src;
3327 
3328 	seq_printf(s, "- %s -\n", mgr_desc[channel].name);
3329 
3330 	lcd_clk_src = dss_get_lcd_clk_source(channel);
3331 
3332 	seq_printf(s, "%s clk source = %s (%s)\n", mgr_desc[channel].name,
3333 		dss_get_generic_clk_source_name(lcd_clk_src),
3334 		dss_feat_get_clk_source_name(lcd_clk_src));
3335 
3336 	dispc_mgr_get_lcd_divisor(channel, &lcd, &pcd);
3337 
3338 	seq_printf(s, "lck\t\t%-16lulck div\t%u\n",
3339 		dispc_mgr_lclk_rate(channel), lcd);
3340 	seq_printf(s, "pck\t\t%-16lupck div\t%u\n",
3341 		dispc_mgr_pclk_rate(channel), pcd);
3342 }
3343 
3344 void dispc_dump_clocks(struct seq_file *s)
3345 {
3346 	int lcd;
3347 	u32 l;
3348 	enum omap_dss_clk_source dispc_clk_src = dss_get_dispc_clk_source();
3349 
3350 	if (dispc_runtime_get())
3351 		return;
3352 
3353 	seq_printf(s, "- DISPC -\n");
3354 
3355 	seq_printf(s, "dispc fclk source = %s (%s)\n",
3356 			dss_get_generic_clk_source_name(dispc_clk_src),
3357 			dss_feat_get_clk_source_name(dispc_clk_src));
3358 
3359 	seq_printf(s, "fck\t\t%-16lu\n", dispc_fclk_rate());
3360 
3361 	if (dss_has_feature(FEAT_CORE_CLK_DIV)) {
3362 		seq_printf(s, "- DISPC-CORE-CLK -\n");
3363 		l = dispc_read_reg(DISPC_DIVISOR);
3364 		lcd = FLD_GET(l, 23, 16);
3365 
3366 		seq_printf(s, "lck\t\t%-16lulck div\t%u\n",
3367 				(dispc_fclk_rate()/lcd), lcd);
3368 	}
3369 
3370 	dispc_dump_clocks_channel(s, OMAP_DSS_CHANNEL_LCD);
3371 
3372 	if (dss_has_feature(FEAT_MGR_LCD2))
3373 		dispc_dump_clocks_channel(s, OMAP_DSS_CHANNEL_LCD2);
3374 	if (dss_has_feature(FEAT_MGR_LCD3))
3375 		dispc_dump_clocks_channel(s, OMAP_DSS_CHANNEL_LCD3);
3376 
3377 	dispc_runtime_put();
3378 }
3379 
3380 static void dispc_dump_regs(struct seq_file *s)
3381 {
3382 	int i, j;
3383 	const char *mgr_names[] = {
3384 		[OMAP_DSS_CHANNEL_LCD]		= "LCD",
3385 		[OMAP_DSS_CHANNEL_DIGIT]	= "TV",
3386 		[OMAP_DSS_CHANNEL_LCD2]		= "LCD2",
3387 		[OMAP_DSS_CHANNEL_LCD3]		= "LCD3",
3388 	};
3389 	const char *ovl_names[] = {
3390 		[OMAP_DSS_GFX]		= "GFX",
3391 		[OMAP_DSS_VIDEO1]	= "VID1",
3392 		[OMAP_DSS_VIDEO2]	= "VID2",
3393 		[OMAP_DSS_VIDEO3]	= "VID3",
3394 		[OMAP_DSS_WB]		= "WB",
3395 	};
3396 	const char **p_names;
3397 
3398 #define DUMPREG(r) seq_printf(s, "%-50s %08x\n", #r, dispc_read_reg(r))
3399 
3400 	if (dispc_runtime_get())
3401 		return;
3402 
3403 	/* DISPC common registers */
3404 	DUMPREG(DISPC_REVISION);
3405 	DUMPREG(DISPC_SYSCONFIG);
3406 	DUMPREG(DISPC_SYSSTATUS);
3407 	DUMPREG(DISPC_IRQSTATUS);
3408 	DUMPREG(DISPC_IRQENABLE);
3409 	DUMPREG(DISPC_CONTROL);
3410 	DUMPREG(DISPC_CONFIG);
3411 	DUMPREG(DISPC_CAPABLE);
3412 	DUMPREG(DISPC_LINE_STATUS);
3413 	DUMPREG(DISPC_LINE_NUMBER);
3414 	if (dss_has_feature(FEAT_ALPHA_FIXED_ZORDER) ||
3415 			dss_has_feature(FEAT_ALPHA_FREE_ZORDER))
3416 		DUMPREG(DISPC_GLOBAL_ALPHA);
3417 	if (dss_has_feature(FEAT_MGR_LCD2)) {
3418 		DUMPREG(DISPC_CONTROL2);
3419 		DUMPREG(DISPC_CONFIG2);
3420 	}
3421 	if (dss_has_feature(FEAT_MGR_LCD3)) {
3422 		DUMPREG(DISPC_CONTROL3);
3423 		DUMPREG(DISPC_CONFIG3);
3424 	}
3425 	if (dss_has_feature(FEAT_MFLAG))
3426 		DUMPREG(DISPC_GLOBAL_MFLAG_ATTRIBUTE);
3427 
3428 #undef DUMPREG
3429 
3430 #define DISPC_REG(i, name) name(i)
3431 #define DUMPREG(i, r) seq_printf(s, "%s(%s)%*s %08x\n", #r, p_names[i], \
3432 	(int)(48 - strlen(#r) - strlen(p_names[i])), " ", \
3433 	dispc_read_reg(DISPC_REG(i, r)))
3434 
3435 	p_names = mgr_names;
3436 
3437 	/* DISPC channel specific registers */
3438 	for (i = 0; i < dss_feat_get_num_mgrs(); i++) {
3439 		DUMPREG(i, DISPC_DEFAULT_COLOR);
3440 		DUMPREG(i, DISPC_TRANS_COLOR);
3441 		DUMPREG(i, DISPC_SIZE_MGR);
3442 
3443 		if (i == OMAP_DSS_CHANNEL_DIGIT)
3444 			continue;
3445 
3446 		DUMPREG(i, DISPC_TIMING_H);
3447 		DUMPREG(i, DISPC_TIMING_V);
3448 		DUMPREG(i, DISPC_POL_FREQ);
3449 		DUMPREG(i, DISPC_DIVISORo);
3450 
3451 		DUMPREG(i, DISPC_DATA_CYCLE1);
3452 		DUMPREG(i, DISPC_DATA_CYCLE2);
3453 		DUMPREG(i, DISPC_DATA_CYCLE3);
3454 
3455 		if (dss_has_feature(FEAT_CPR)) {
3456 			DUMPREG(i, DISPC_CPR_COEF_R);
3457 			DUMPREG(i, DISPC_CPR_COEF_G);
3458 			DUMPREG(i, DISPC_CPR_COEF_B);
3459 		}
3460 	}
3461 
3462 	p_names = ovl_names;
3463 
3464 	for (i = 0; i < dss_feat_get_num_ovls(); i++) {
3465 		DUMPREG(i, DISPC_OVL_BA0);
3466 		DUMPREG(i, DISPC_OVL_BA1);
3467 		DUMPREG(i, DISPC_OVL_POSITION);
3468 		DUMPREG(i, DISPC_OVL_SIZE);
3469 		DUMPREG(i, DISPC_OVL_ATTRIBUTES);
3470 		DUMPREG(i, DISPC_OVL_FIFO_THRESHOLD);
3471 		DUMPREG(i, DISPC_OVL_FIFO_SIZE_STATUS);
3472 		DUMPREG(i, DISPC_OVL_ROW_INC);
3473 		DUMPREG(i, DISPC_OVL_PIXEL_INC);
3474 
3475 		if (dss_has_feature(FEAT_PRELOAD))
3476 			DUMPREG(i, DISPC_OVL_PRELOAD);
3477 		if (dss_has_feature(FEAT_MFLAG))
3478 			DUMPREG(i, DISPC_OVL_MFLAG_THRESHOLD);
3479 
3480 		if (i == OMAP_DSS_GFX) {
3481 			DUMPREG(i, DISPC_OVL_WINDOW_SKIP);
3482 			DUMPREG(i, DISPC_OVL_TABLE_BA);
3483 			continue;
3484 		}
3485 
3486 		DUMPREG(i, DISPC_OVL_FIR);
3487 		DUMPREG(i, DISPC_OVL_PICTURE_SIZE);
3488 		DUMPREG(i, DISPC_OVL_ACCU0);
3489 		DUMPREG(i, DISPC_OVL_ACCU1);
3490 		if (dss_has_feature(FEAT_HANDLE_UV_SEPARATE)) {
3491 			DUMPREG(i, DISPC_OVL_BA0_UV);
3492 			DUMPREG(i, DISPC_OVL_BA1_UV);
3493 			DUMPREG(i, DISPC_OVL_FIR2);
3494 			DUMPREG(i, DISPC_OVL_ACCU2_0);
3495 			DUMPREG(i, DISPC_OVL_ACCU2_1);
3496 		}
3497 		if (dss_has_feature(FEAT_ATTR2))
3498 			DUMPREG(i, DISPC_OVL_ATTRIBUTES2);
3499 	}
3500 
3501 	if (dispc.feat->has_writeback) {
3502 		i = OMAP_DSS_WB;
3503 		DUMPREG(i, DISPC_OVL_BA0);
3504 		DUMPREG(i, DISPC_OVL_BA1);
3505 		DUMPREG(i, DISPC_OVL_SIZE);
3506 		DUMPREG(i, DISPC_OVL_ATTRIBUTES);
3507 		DUMPREG(i, DISPC_OVL_FIFO_THRESHOLD);
3508 		DUMPREG(i, DISPC_OVL_FIFO_SIZE_STATUS);
3509 		DUMPREG(i, DISPC_OVL_ROW_INC);
3510 		DUMPREG(i, DISPC_OVL_PIXEL_INC);
3511 
3512 		if (dss_has_feature(FEAT_MFLAG))
3513 			DUMPREG(i, DISPC_OVL_MFLAG_THRESHOLD);
3514 
3515 		DUMPREG(i, DISPC_OVL_FIR);
3516 		DUMPREG(i, DISPC_OVL_PICTURE_SIZE);
3517 		DUMPREG(i, DISPC_OVL_ACCU0);
3518 		DUMPREG(i, DISPC_OVL_ACCU1);
3519 		if (dss_has_feature(FEAT_HANDLE_UV_SEPARATE)) {
3520 			DUMPREG(i, DISPC_OVL_BA0_UV);
3521 			DUMPREG(i, DISPC_OVL_BA1_UV);
3522 			DUMPREG(i, DISPC_OVL_FIR2);
3523 			DUMPREG(i, DISPC_OVL_ACCU2_0);
3524 			DUMPREG(i, DISPC_OVL_ACCU2_1);
3525 		}
3526 		if (dss_has_feature(FEAT_ATTR2))
3527 			DUMPREG(i, DISPC_OVL_ATTRIBUTES2);
3528 	}
3529 
3530 #undef DISPC_REG
3531 #undef DUMPREG
3532 
3533 #define DISPC_REG(plane, name, i) name(plane, i)
3534 #define DUMPREG(plane, name, i) \
3535 	seq_printf(s, "%s_%d(%s)%*s %08x\n", #name, i, p_names[plane], \
3536 	(int)(46 - strlen(#name) - strlen(p_names[plane])), " ", \
3537 	dispc_read_reg(DISPC_REG(plane, name, i)))
3538 
3539 	/* Video pipeline coefficient registers */
3540 
3541 	/* start from OMAP_DSS_VIDEO1 */
3542 	for (i = 1; i < dss_feat_get_num_ovls(); i++) {
3543 		for (j = 0; j < 8; j++)
3544 			DUMPREG(i, DISPC_OVL_FIR_COEF_H, j);
3545 
3546 		for (j = 0; j < 8; j++)
3547 			DUMPREG(i, DISPC_OVL_FIR_COEF_HV, j);
3548 
3549 		for (j = 0; j < 5; j++)
3550 			DUMPREG(i, DISPC_OVL_CONV_COEF, j);
3551 
3552 		if (dss_has_feature(FEAT_FIR_COEF_V)) {
3553 			for (j = 0; j < 8; j++)
3554 				DUMPREG(i, DISPC_OVL_FIR_COEF_V, j);
3555 		}
3556 
3557 		if (dss_has_feature(FEAT_HANDLE_UV_SEPARATE)) {
3558 			for (j = 0; j < 8; j++)
3559 				DUMPREG(i, DISPC_OVL_FIR_COEF_H2, j);
3560 
3561 			for (j = 0; j < 8; j++)
3562 				DUMPREG(i, DISPC_OVL_FIR_COEF_HV2, j);
3563 
3564 			for (j = 0; j < 8; j++)
3565 				DUMPREG(i, DISPC_OVL_FIR_COEF_V2, j);
3566 		}
3567 	}
3568 
3569 	dispc_runtime_put();
3570 
3571 #undef DISPC_REG
3572 #undef DUMPREG
3573 }
3574 
3575 /* calculate clock rates using dividers in cinfo */
3576 int dispc_calc_clock_rates(unsigned long dispc_fclk_rate,
3577 		struct dispc_clock_info *cinfo)
3578 {
3579 	if (cinfo->lck_div > 255 || cinfo->lck_div == 0)
3580 		return -EINVAL;
3581 	if (cinfo->pck_div < 1 || cinfo->pck_div > 255)
3582 		return -EINVAL;
3583 
3584 	cinfo->lck = dispc_fclk_rate / cinfo->lck_div;
3585 	cinfo->pck = cinfo->lck / cinfo->pck_div;
3586 
3587 	return 0;
3588 }
3589 
3590 bool dispc_div_calc(unsigned long dispc,
3591 		unsigned long pck_min, unsigned long pck_max,
3592 		dispc_div_calc_func func, void *data)
3593 {
3594 	int lckd, lckd_start, lckd_stop;
3595 	int pckd, pckd_start, pckd_stop;
3596 	unsigned long pck, lck;
3597 	unsigned long lck_max;
3598 	unsigned long pckd_hw_min, pckd_hw_max;
3599 	unsigned min_fck_per_pck;
3600 	unsigned long fck;
3601 
3602 #ifdef CONFIG_FB_OMAP2_DSS_MIN_FCK_PER_PCK
3603 	min_fck_per_pck = CONFIG_FB_OMAP2_DSS_MIN_FCK_PER_PCK;
3604 #else
3605 	min_fck_per_pck = 0;
3606 #endif
3607 
3608 	pckd_hw_min = dss_feat_get_param_min(FEAT_PARAM_DSS_PCD);
3609 	pckd_hw_max = dss_feat_get_param_max(FEAT_PARAM_DSS_PCD);
3610 
3611 	lck_max = dss_feat_get_param_max(FEAT_PARAM_DSS_FCK);
3612 
3613 	pck_min = pck_min ? pck_min : 1;
3614 	pck_max = pck_max ? pck_max : ULONG_MAX;
3615 
3616 	lckd_start = max(DIV_ROUND_UP(dispc, lck_max), 1ul);
3617 	lckd_stop = min(dispc / pck_min, 255ul);
3618 
3619 	for (lckd = lckd_start; lckd <= lckd_stop; ++lckd) {
3620 		lck = dispc / lckd;
3621 
3622 		pckd_start = max(DIV_ROUND_UP(lck, pck_max), pckd_hw_min);
3623 		pckd_stop = min(lck / pck_min, pckd_hw_max);
3624 
3625 		for (pckd = pckd_start; pckd <= pckd_stop; ++pckd) {
3626 			pck = lck / pckd;
3627 
3628 			/*
3629 			 * For OMAP2/3 the DISPC fclk is the same as LCD's logic
3630 			 * clock, which means we're configuring DISPC fclk here
3631 			 * also. Thus we need to use the calculated lck. For
3632 			 * OMAP4+ the DISPC fclk is a separate clock.
3633 			 */
3634 			if (dss_has_feature(FEAT_CORE_CLK_DIV))
3635 				fck = dispc_core_clk_rate();
3636 			else
3637 				fck = lck;
3638 
3639 			if (fck < pck * min_fck_per_pck)
3640 				continue;
3641 
3642 			if (func(lckd, pckd, lck, pck, data))
3643 				return true;
3644 		}
3645 	}
3646 
3647 	return false;
3648 }
3649 
3650 void dispc_mgr_set_clock_div(enum omap_channel channel,
3651 		const struct dispc_clock_info *cinfo)
3652 {
3653 	DSSDBG("lck = %lu (%u)\n", cinfo->lck, cinfo->lck_div);
3654 	DSSDBG("pck = %lu (%u)\n", cinfo->pck, cinfo->pck_div);
3655 
3656 	dispc_mgr_set_lcd_divisor(channel, cinfo->lck_div, cinfo->pck_div);
3657 }
3658 
3659 int dispc_mgr_get_clock_div(enum omap_channel channel,
3660 		struct dispc_clock_info *cinfo)
3661 {
3662 	unsigned long fck;
3663 
3664 	fck = dispc_fclk_rate();
3665 
3666 	cinfo->lck_div = REG_GET(DISPC_DIVISORo(channel), 23, 16);
3667 	cinfo->pck_div = REG_GET(DISPC_DIVISORo(channel), 7, 0);
3668 
3669 	cinfo->lck = fck / cinfo->lck_div;
3670 	cinfo->pck = cinfo->lck / cinfo->pck_div;
3671 
3672 	return 0;
3673 }
3674 
3675 u32 dispc_read_irqstatus(void)
3676 {
3677 	return dispc_read_reg(DISPC_IRQSTATUS);
3678 }
3679 EXPORT_SYMBOL(dispc_read_irqstatus);
3680 
3681 void dispc_clear_irqstatus(u32 mask)
3682 {
3683 	dispc_write_reg(DISPC_IRQSTATUS, mask);
3684 }
3685 EXPORT_SYMBOL(dispc_clear_irqstatus);
3686 
3687 u32 dispc_read_irqenable(void)
3688 {
3689 	return dispc_read_reg(DISPC_IRQENABLE);
3690 }
3691 EXPORT_SYMBOL(dispc_read_irqenable);
3692 
3693 void dispc_write_irqenable(u32 mask)
3694 {
3695 	u32 old_mask = dispc_read_reg(DISPC_IRQENABLE);
3696 
3697 	/* clear the irqstatus for newly enabled irqs */
3698 	dispc_clear_irqstatus((mask ^ old_mask) & mask);
3699 
3700 	dispc_write_reg(DISPC_IRQENABLE, mask);
3701 }
3702 EXPORT_SYMBOL(dispc_write_irqenable);
3703 
3704 void dispc_enable_sidle(void)
3705 {
3706 	REG_FLD_MOD(DISPC_SYSCONFIG, 2, 4, 3);	/* SIDLEMODE: smart idle */
3707 }
3708 
3709 void dispc_disable_sidle(void)
3710 {
3711 	REG_FLD_MOD(DISPC_SYSCONFIG, 1, 4, 3);	/* SIDLEMODE: no idle */
3712 }
3713 
3714 static void _omap_dispc_initial_config(void)
3715 {
3716 	u32 l;
3717 
3718 	/* Exclusively enable DISPC_CORE_CLK and set divider to 1 */
3719 	if (dss_has_feature(FEAT_CORE_CLK_DIV)) {
3720 		l = dispc_read_reg(DISPC_DIVISOR);
3721 		/* Use DISPC_DIVISOR.LCD, instead of DISPC_DIVISOR1.LCD */
3722 		l = FLD_MOD(l, 1, 0, 0);
3723 		l = FLD_MOD(l, 1, 23, 16);
3724 		dispc_write_reg(DISPC_DIVISOR, l);
3725 
3726 		dispc.core_clk_rate = dispc_fclk_rate();
3727 	}
3728 
3729 	/* FUNCGATED */
3730 	if (dss_has_feature(FEAT_FUNCGATED))
3731 		REG_FLD_MOD(DISPC_CONFIG, 1, 9, 9);
3732 
3733 	dispc_setup_color_conv_coef();
3734 
3735 	dispc_set_loadmode(OMAP_DSS_LOAD_FRAME_ONLY);
3736 
3737 	dispc_init_fifos();
3738 
3739 	dispc_configure_burst_sizes();
3740 
3741 	dispc_ovl_enable_zorder_planes();
3742 
3743 	if (dispc.feat->mstandby_workaround)
3744 		REG_FLD_MOD(DISPC_MSTANDBY_CTRL, 1, 0, 0);
3745 
3746 	if (dss_has_feature(FEAT_MFLAG))
3747 		dispc_init_mflag();
3748 }
3749 
3750 static const struct dispc_features omap24xx_dispc_feats = {
3751 	.sw_start		=	5,
3752 	.fp_start		=	15,
3753 	.bp_start		=	27,
3754 	.sw_max			=	64,
3755 	.vp_max			=	255,
3756 	.hp_max			=	256,
3757 	.mgr_width_start	=	10,
3758 	.mgr_height_start	=	26,
3759 	.mgr_width_max		=	2048,
3760 	.mgr_height_max		=	2048,
3761 	.max_lcd_pclk		=	66500000,
3762 	.calc_scaling		=	dispc_ovl_calc_scaling_24xx,
3763 	.calc_core_clk		=	calc_core_clk_24xx,
3764 	.num_fifos		=	3,
3765 	.no_framedone_tv	=	true,
3766 	.set_max_preload	=	false,
3767 	.last_pixel_inc_missing	=	true,
3768 };
3769 
3770 static const struct dispc_features omap34xx_rev1_0_dispc_feats = {
3771 	.sw_start		=	5,
3772 	.fp_start		=	15,
3773 	.bp_start		=	27,
3774 	.sw_max			=	64,
3775 	.vp_max			=	255,
3776 	.hp_max			=	256,
3777 	.mgr_width_start	=	10,
3778 	.mgr_height_start	=	26,
3779 	.mgr_width_max		=	2048,
3780 	.mgr_height_max		=	2048,
3781 	.max_lcd_pclk		=	173000000,
3782 	.max_tv_pclk		=	59000000,
3783 	.calc_scaling		=	dispc_ovl_calc_scaling_34xx,
3784 	.calc_core_clk		=	calc_core_clk_34xx,
3785 	.num_fifos		=	3,
3786 	.no_framedone_tv	=	true,
3787 	.set_max_preload	=	false,
3788 	.last_pixel_inc_missing	=	true,
3789 };
3790 
3791 static const struct dispc_features omap34xx_rev3_0_dispc_feats = {
3792 	.sw_start		=	7,
3793 	.fp_start		=	19,
3794 	.bp_start		=	31,
3795 	.sw_max			=	256,
3796 	.vp_max			=	4095,
3797 	.hp_max			=	4096,
3798 	.mgr_width_start	=	10,
3799 	.mgr_height_start	=	26,
3800 	.mgr_width_max		=	2048,
3801 	.mgr_height_max		=	2048,
3802 	.max_lcd_pclk		=	173000000,
3803 	.max_tv_pclk		=	59000000,
3804 	.calc_scaling		=	dispc_ovl_calc_scaling_34xx,
3805 	.calc_core_clk		=	calc_core_clk_34xx,
3806 	.num_fifos		=	3,
3807 	.no_framedone_tv	=	true,
3808 	.set_max_preload	=	false,
3809 	.last_pixel_inc_missing	=	true,
3810 };
3811 
3812 static const struct dispc_features omap44xx_dispc_feats = {
3813 	.sw_start		=	7,
3814 	.fp_start		=	19,
3815 	.bp_start		=	31,
3816 	.sw_max			=	256,
3817 	.vp_max			=	4095,
3818 	.hp_max			=	4096,
3819 	.mgr_width_start	=	10,
3820 	.mgr_height_start	=	26,
3821 	.mgr_width_max		=	2048,
3822 	.mgr_height_max		=	2048,
3823 	.max_lcd_pclk		=	170000000,
3824 	.max_tv_pclk		=	185625000,
3825 	.calc_scaling		=	dispc_ovl_calc_scaling_44xx,
3826 	.calc_core_clk		=	calc_core_clk_44xx,
3827 	.num_fifos		=	5,
3828 	.gfx_fifo_workaround	=	true,
3829 	.set_max_preload	=	true,
3830 	.supports_sync_align	=	true,
3831 	.has_writeback		=	true,
3832 };
3833 
3834 static const struct dispc_features omap54xx_dispc_feats = {
3835 	.sw_start		=	7,
3836 	.fp_start		=	19,
3837 	.bp_start		=	31,
3838 	.sw_max			=	256,
3839 	.vp_max			=	4095,
3840 	.hp_max			=	4096,
3841 	.mgr_width_start	=	11,
3842 	.mgr_height_start	=	27,
3843 	.mgr_width_max		=	4096,
3844 	.mgr_height_max		=	4096,
3845 	.max_lcd_pclk		=	170000000,
3846 	.max_tv_pclk		=	186000000,
3847 	.calc_scaling		=	dispc_ovl_calc_scaling_44xx,
3848 	.calc_core_clk		=	calc_core_clk_44xx,
3849 	.num_fifos		=	5,
3850 	.gfx_fifo_workaround	=	true,
3851 	.mstandby_workaround	=	true,
3852 	.set_max_preload	=	true,
3853 	.supports_sync_align	=	true,
3854 	.has_writeback		=	true,
3855 };
3856 
3857 static const struct dispc_features *dispc_get_features(void)
3858 {
3859 	switch (omapdss_get_version()) {
3860 	case OMAPDSS_VER_OMAP24xx:
3861 		return &omap24xx_dispc_feats;
3862 
3863 	case OMAPDSS_VER_OMAP34xx_ES1:
3864 		return &omap34xx_rev1_0_dispc_feats;
3865 
3866 	case OMAPDSS_VER_OMAP34xx_ES3:
3867 	case OMAPDSS_VER_OMAP3630:
3868 	case OMAPDSS_VER_AM35xx:
3869 	case OMAPDSS_VER_AM43xx:
3870 		return &omap34xx_rev3_0_dispc_feats;
3871 
3872 	case OMAPDSS_VER_OMAP4430_ES1:
3873 	case OMAPDSS_VER_OMAP4430_ES2:
3874 	case OMAPDSS_VER_OMAP4:
3875 		return &omap44xx_dispc_feats;
3876 
3877 	case OMAPDSS_VER_OMAP5:
3878 	case OMAPDSS_VER_DRA7xx:
3879 		return &omap54xx_dispc_feats;
3880 
3881 	default:
3882 		return NULL;
3883 	}
3884 }
3885 
3886 static irqreturn_t dispc_irq_handler(int irq, void *arg)
3887 {
3888 	if (!dispc.is_enabled)
3889 		return IRQ_NONE;
3890 
3891 	return dispc.user_handler(irq, dispc.user_data);
3892 }
3893 
3894 int dispc_request_irq(irq_handler_t handler, void *dev_id)
3895 {
3896 	int r;
3897 
3898 	if (dispc.user_handler != NULL)
3899 		return -EBUSY;
3900 
3901 	dispc.user_handler = handler;
3902 	dispc.user_data = dev_id;
3903 
3904 	/* ensure the dispc_irq_handler sees the values above */
3905 	smp_wmb();
3906 
3907 	r = devm_request_irq(&dispc.pdev->dev, dispc.irq, dispc_irq_handler,
3908 			     IRQF_SHARED, "OMAP DISPC", &dispc);
3909 	if (r) {
3910 		dispc.user_handler = NULL;
3911 		dispc.user_data = NULL;
3912 	}
3913 
3914 	return r;
3915 }
3916 EXPORT_SYMBOL(dispc_request_irq);
3917 
3918 void dispc_free_irq(void *dev_id)
3919 {
3920 	devm_free_irq(&dispc.pdev->dev, dispc.irq, &dispc);
3921 
3922 	dispc.user_handler = NULL;
3923 	dispc.user_data = NULL;
3924 }
3925 EXPORT_SYMBOL(dispc_free_irq);
3926 
3927 /* DISPC HW IP initialisation */
3928 static int dispc_bind(struct device *dev, struct device *master, void *data)
3929 {
3930 	struct platform_device *pdev = to_platform_device(dev);
3931 	u32 rev;
3932 	int r = 0;
3933 	struct resource *dispc_mem;
3934 	struct device_node *np = pdev->dev.of_node;
3935 
3936 	dispc.pdev = pdev;
3937 
3938 	spin_lock_init(&dispc.control_lock);
3939 
3940 	dispc.feat = dispc_get_features();
3941 	if (!dispc.feat)
3942 		return -ENODEV;
3943 
3944 	dispc_mem = platform_get_resource(dispc.pdev, IORESOURCE_MEM, 0);
3945 	if (!dispc_mem) {
3946 		DSSERR("can't get IORESOURCE_MEM DISPC\n");
3947 		return -EINVAL;
3948 	}
3949 
3950 	dispc.base = devm_ioremap(&pdev->dev, dispc_mem->start,
3951 				  resource_size(dispc_mem));
3952 	if (!dispc.base) {
3953 		DSSERR("can't ioremap DISPC\n");
3954 		return -ENOMEM;
3955 	}
3956 
3957 	dispc.irq = platform_get_irq(dispc.pdev, 0);
3958 	if (dispc.irq < 0) {
3959 		DSSERR("platform_get_irq failed\n");
3960 		return -ENODEV;
3961 	}
3962 
3963 	if (np && of_property_read_bool(np, "syscon-pol")) {
3964 		dispc.syscon_pol = syscon_regmap_lookup_by_phandle(np, "syscon-pol");
3965 		if (IS_ERR(dispc.syscon_pol)) {
3966 			dev_err(&pdev->dev, "failed to get syscon-pol regmap\n");
3967 			return PTR_ERR(dispc.syscon_pol);
3968 		}
3969 
3970 		if (of_property_read_u32_index(np, "syscon-pol", 1,
3971 				&dispc.syscon_pol_offset)) {
3972 			dev_err(&pdev->dev, "failed to get syscon-pol offset\n");
3973 			return -EINVAL;
3974 		}
3975 	}
3976 
3977 	pm_runtime_enable(&pdev->dev);
3978 
3979 	r = dispc_runtime_get();
3980 	if (r)
3981 		goto err_runtime_get;
3982 
3983 	_omap_dispc_initial_config();
3984 
3985 	rev = dispc_read_reg(DISPC_REVISION);
3986 	dev_dbg(&pdev->dev, "OMAP DISPC rev %d.%d\n",
3987 	       FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
3988 
3989 	dispc_runtime_put();
3990 
3991 	dss_init_overlay_managers();
3992 
3993 	dss_debugfs_create_file("dispc", dispc_dump_regs);
3994 
3995 	return 0;
3996 
3997 err_runtime_get:
3998 	pm_runtime_disable(&pdev->dev);
3999 	return r;
4000 }
4001 
4002 static void dispc_unbind(struct device *dev, struct device *master,
4003 			       void *data)
4004 {
4005 	pm_runtime_disable(dev);
4006 
4007 	dss_uninit_overlay_managers();
4008 }
4009 
4010 static const struct component_ops dispc_component_ops = {
4011 	.bind	= dispc_bind,
4012 	.unbind	= dispc_unbind,
4013 };
4014 
4015 static int dispc_probe(struct platform_device *pdev)
4016 {
4017 	return component_add(&pdev->dev, &dispc_component_ops);
4018 }
4019 
4020 static int dispc_remove(struct platform_device *pdev)
4021 {
4022 	component_del(&pdev->dev, &dispc_component_ops);
4023 	return 0;
4024 }
4025 
4026 static int dispc_runtime_suspend(struct device *dev)
4027 {
4028 	dispc.is_enabled = false;
4029 	/* ensure the dispc_irq_handler sees the is_enabled value */
4030 	smp_wmb();
4031 	/* wait for current handler to finish before turning the DISPC off */
4032 	synchronize_irq(dispc.irq);
4033 
4034 	dispc_save_context();
4035 
4036 	return 0;
4037 }
4038 
4039 static int dispc_runtime_resume(struct device *dev)
4040 {
4041 	/*
4042 	 * The reset value for load mode is 0 (OMAP_DSS_LOAD_CLUT_AND_FRAME)
4043 	 * but we always initialize it to 2 (OMAP_DSS_LOAD_FRAME_ONLY) in
4044 	 * _omap_dispc_initial_config(). We can thus use it to detect if
4045 	 * we have lost register context.
4046 	 */
4047 	if (REG_GET(DISPC_CONFIG, 2, 1) != OMAP_DSS_LOAD_FRAME_ONLY) {
4048 		_omap_dispc_initial_config();
4049 
4050 		dispc_restore_context();
4051 	}
4052 
4053 	dispc.is_enabled = true;
4054 	/* ensure the dispc_irq_handler sees the is_enabled value */
4055 	smp_wmb();
4056 
4057 	return 0;
4058 }
4059 
4060 static const struct dev_pm_ops dispc_pm_ops = {
4061 	.runtime_suspend = dispc_runtime_suspend,
4062 	.runtime_resume = dispc_runtime_resume,
4063 };
4064 
4065 static const struct of_device_id dispc_of_match[] = {
4066 	{ .compatible = "ti,omap2-dispc", },
4067 	{ .compatible = "ti,omap3-dispc", },
4068 	{ .compatible = "ti,omap4-dispc", },
4069 	{ .compatible = "ti,omap5-dispc", },
4070 	{ .compatible = "ti,dra7-dispc", },
4071 	{},
4072 };
4073 
4074 static struct platform_driver omap_dispchw_driver = {
4075 	.probe		= dispc_probe,
4076 	.remove         = dispc_remove,
4077 	.driver         = {
4078 		.name   = "omapdss_dispc",
4079 		.pm	= &dispc_pm_ops,
4080 		.of_match_table = dispc_of_match,
4081 		.suppress_bind_attrs = true,
4082 	},
4083 };
4084 
4085 int __init dispc_init_platform_driver(void)
4086 {
4087 	return platform_driver_register(&omap_dispchw_driver);
4088 }
4089 
4090 void dispc_uninit_platform_driver(void)
4091 {
4092 	platform_driver_unregister(&omap_dispchw_driver);
4093 }
4094