xref: /openbmc/linux/drivers/gpu/drm/omapdrm/dss/dss.c (revision c2807ecb)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (C) 2009 Nokia Corporation
4  * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
5  *
6  * Some code and ideas taken from drivers/video/omap/ driver
7  * by Imre Deak.
8  */
9 
10 #define DSS_SUBSYS_NAME "DSS"
11 
12 #include <linux/debugfs.h>
13 #include <linux/dma-mapping.h>
14 #include <linux/kernel.h>
15 #include <linux/module.h>
16 #include <linux/io.h>
17 #include <linux/export.h>
18 #include <linux/err.h>
19 #include <linux/delay.h>
20 #include <linux/seq_file.h>
21 #include <linux/clk.h>
22 #include <linux/pinctrl/consumer.h>
23 #include <linux/platform_device.h>
24 #include <linux/pm_runtime.h>
25 #include <linux/gfp.h>
26 #include <linux/sizes.h>
27 #include <linux/mfd/syscon.h>
28 #include <linux/regmap.h>
29 #include <linux/of.h>
30 #include <linux/of_device.h>
31 #include <linux/of_graph.h>
32 #include <linux/regulator/consumer.h>
33 #include <linux/suspend.h>
34 #include <linux/component.h>
35 #include <linux/sys_soc.h>
36 
37 #include "omapdss.h"
38 #include "dss.h"
39 
40 struct dss_reg {
41 	u16 idx;
42 };
43 
44 #define DSS_REG(idx)			((const struct dss_reg) { idx })
45 
46 #define DSS_REVISION			DSS_REG(0x0000)
47 #define DSS_SYSCONFIG			DSS_REG(0x0010)
48 #define DSS_SYSSTATUS			DSS_REG(0x0014)
49 #define DSS_CONTROL			DSS_REG(0x0040)
50 #define DSS_SDI_CONTROL			DSS_REG(0x0044)
51 #define DSS_PLL_CONTROL			DSS_REG(0x0048)
52 #define DSS_SDI_STATUS			DSS_REG(0x005C)
53 
54 #define REG_GET(dss, idx, start, end) \
55 	FLD_GET(dss_read_reg(dss, idx), start, end)
56 
57 #define REG_FLD_MOD(dss, idx, val, start, end) \
58 	dss_write_reg(dss, idx, \
59 		      FLD_MOD(dss_read_reg(dss, idx), val, start, end))
60 
61 struct dss_ops {
62 	int (*dpi_select_source)(struct dss_device *dss, int port,
63 				 enum omap_channel channel);
64 	int (*select_lcd_source)(struct dss_device *dss,
65 				 enum omap_channel channel,
66 				 enum dss_clk_source clk_src);
67 };
68 
69 struct dss_features {
70 	enum dss_model model;
71 	u8 fck_div_max;
72 	unsigned int fck_freq_max;
73 	u8 dss_fck_multiplier;
74 	const char *parent_clk_name;
75 	const enum omap_display_type *ports;
76 	int num_ports;
77 	const enum omap_dss_output_id *outputs;
78 	const struct dss_ops *ops;
79 	struct dss_reg_field dispc_clk_switch;
80 	bool has_lcd_clk_src;
81 };
82 
83 static const char * const dss_generic_clk_source_names[] = {
84 	[DSS_CLK_SRC_FCK]	= "FCK",
85 	[DSS_CLK_SRC_PLL1_1]	= "PLL1:1",
86 	[DSS_CLK_SRC_PLL1_2]	= "PLL1:2",
87 	[DSS_CLK_SRC_PLL1_3]	= "PLL1:3",
88 	[DSS_CLK_SRC_PLL2_1]	= "PLL2:1",
89 	[DSS_CLK_SRC_PLL2_2]	= "PLL2:2",
90 	[DSS_CLK_SRC_PLL2_3]	= "PLL2:3",
91 	[DSS_CLK_SRC_HDMI_PLL]	= "HDMI PLL",
92 };
93 
dss_write_reg(struct dss_device * dss,const struct dss_reg idx,u32 val)94 static inline void dss_write_reg(struct dss_device *dss,
95 				 const struct dss_reg idx, u32 val)
96 {
97 	__raw_writel(val, dss->base + idx.idx);
98 }
99 
dss_read_reg(struct dss_device * dss,const struct dss_reg idx)100 static inline u32 dss_read_reg(struct dss_device *dss, const struct dss_reg idx)
101 {
102 	return __raw_readl(dss->base + idx.idx);
103 }
104 
105 #define SR(dss, reg) \
106 	dss->ctx[(DSS_##reg).idx / sizeof(u32)] = dss_read_reg(dss, DSS_##reg)
107 #define RR(dss, reg) \
108 	dss_write_reg(dss, DSS_##reg, dss->ctx[(DSS_##reg).idx / sizeof(u32)])
109 
dss_save_context(struct dss_device * dss)110 static void dss_save_context(struct dss_device *dss)
111 {
112 	DSSDBG("dss_save_context\n");
113 
114 	SR(dss, CONTROL);
115 
116 	if (dss->feat->outputs[OMAP_DSS_CHANNEL_LCD] & OMAP_DSS_OUTPUT_SDI) {
117 		SR(dss, SDI_CONTROL);
118 		SR(dss, PLL_CONTROL);
119 	}
120 
121 	dss->ctx_valid = true;
122 
123 	DSSDBG("context saved\n");
124 }
125 
dss_restore_context(struct dss_device * dss)126 static void dss_restore_context(struct dss_device *dss)
127 {
128 	DSSDBG("dss_restore_context\n");
129 
130 	if (!dss->ctx_valid)
131 		return;
132 
133 	RR(dss, CONTROL);
134 
135 	if (dss->feat->outputs[OMAP_DSS_CHANNEL_LCD] & OMAP_DSS_OUTPUT_SDI) {
136 		RR(dss, SDI_CONTROL);
137 		RR(dss, PLL_CONTROL);
138 	}
139 
140 	DSSDBG("context restored\n");
141 }
142 
143 #undef SR
144 #undef RR
145 
dss_ctrl_pll_enable(struct dss_pll * pll,bool enable)146 void dss_ctrl_pll_enable(struct dss_pll *pll, bool enable)
147 {
148 	unsigned int shift;
149 	unsigned int val;
150 
151 	if (!pll->dss->syscon_pll_ctrl)
152 		return;
153 
154 	val = !enable;
155 
156 	switch (pll->id) {
157 	case DSS_PLL_VIDEO1:
158 		shift = 0;
159 		break;
160 	case DSS_PLL_VIDEO2:
161 		shift = 1;
162 		break;
163 	case DSS_PLL_HDMI:
164 		shift = 2;
165 		break;
166 	default:
167 		DSSERR("illegal DSS PLL ID %d\n", pll->id);
168 		return;
169 	}
170 
171 	regmap_update_bits(pll->dss->syscon_pll_ctrl,
172 			   pll->dss->syscon_pll_ctrl_offset,
173 			   1 << shift, val << shift);
174 }
175 
dss_ctrl_pll_set_control_mux(struct dss_device * dss,enum dss_clk_source clk_src,enum omap_channel channel)176 static int dss_ctrl_pll_set_control_mux(struct dss_device *dss,
177 					enum dss_clk_source clk_src,
178 					enum omap_channel channel)
179 {
180 	unsigned int shift, val;
181 
182 	if (!dss->syscon_pll_ctrl)
183 		return -EINVAL;
184 
185 	switch (channel) {
186 	case OMAP_DSS_CHANNEL_LCD:
187 		shift = 3;
188 
189 		switch (clk_src) {
190 		case DSS_CLK_SRC_PLL1_1:
191 			val = 0; break;
192 		case DSS_CLK_SRC_HDMI_PLL:
193 			val = 1; break;
194 		default:
195 			DSSERR("error in PLL mux config for LCD\n");
196 			return -EINVAL;
197 		}
198 
199 		break;
200 	case OMAP_DSS_CHANNEL_LCD2:
201 		shift = 5;
202 
203 		switch (clk_src) {
204 		case DSS_CLK_SRC_PLL1_3:
205 			val = 0; break;
206 		case DSS_CLK_SRC_PLL2_3:
207 			val = 1; break;
208 		case DSS_CLK_SRC_HDMI_PLL:
209 			val = 2; break;
210 		default:
211 			DSSERR("error in PLL mux config for LCD2\n");
212 			return -EINVAL;
213 		}
214 
215 		break;
216 	case OMAP_DSS_CHANNEL_LCD3:
217 		shift = 7;
218 
219 		switch (clk_src) {
220 		case DSS_CLK_SRC_PLL2_1:
221 			val = 0; break;
222 		case DSS_CLK_SRC_PLL1_3:
223 			val = 1; break;
224 		case DSS_CLK_SRC_HDMI_PLL:
225 			val = 2; break;
226 		default:
227 			DSSERR("error in PLL mux config for LCD3\n");
228 			return -EINVAL;
229 		}
230 
231 		break;
232 	default:
233 		DSSERR("error in PLL mux config\n");
234 		return -EINVAL;
235 	}
236 
237 	regmap_update_bits(dss->syscon_pll_ctrl, dss->syscon_pll_ctrl_offset,
238 		0x3 << shift, val << shift);
239 
240 	return 0;
241 }
242 
dss_sdi_init(struct dss_device * dss,int datapairs)243 void dss_sdi_init(struct dss_device *dss, int datapairs)
244 {
245 	u32 l;
246 
247 	BUG_ON(datapairs > 3 || datapairs < 1);
248 
249 	l = dss_read_reg(dss, DSS_SDI_CONTROL);
250 	l = FLD_MOD(l, 0xf, 19, 15);		/* SDI_PDIV */
251 	l = FLD_MOD(l, datapairs-1, 3, 2);	/* SDI_PRSEL */
252 	l = FLD_MOD(l, 2, 1, 0);		/* SDI_BWSEL */
253 	dss_write_reg(dss, DSS_SDI_CONTROL, l);
254 
255 	l = dss_read_reg(dss, DSS_PLL_CONTROL);
256 	l = FLD_MOD(l, 0x7, 25, 22);	/* SDI_PLL_FREQSEL */
257 	l = FLD_MOD(l, 0xb, 16, 11);	/* SDI_PLL_REGN */
258 	l = FLD_MOD(l, 0xb4, 10, 1);	/* SDI_PLL_REGM */
259 	dss_write_reg(dss, DSS_PLL_CONTROL, l);
260 }
261 
dss_sdi_enable(struct dss_device * dss)262 int dss_sdi_enable(struct dss_device *dss)
263 {
264 	unsigned long timeout;
265 
266 	dispc_pck_free_enable(dss->dispc, 1);
267 
268 	/* Reset SDI PLL */
269 	REG_FLD_MOD(dss, DSS_PLL_CONTROL, 1, 18, 18); /* SDI_PLL_SYSRESET */
270 	udelay(1);	/* wait 2x PCLK */
271 
272 	/* Lock SDI PLL */
273 	REG_FLD_MOD(dss, DSS_PLL_CONTROL, 1, 28, 28); /* SDI_PLL_GOBIT */
274 
275 	/* Waiting for PLL lock request to complete */
276 	timeout = jiffies + msecs_to_jiffies(500);
277 	while (dss_read_reg(dss, DSS_SDI_STATUS) & (1 << 6)) {
278 		if (time_after_eq(jiffies, timeout)) {
279 			DSSERR("PLL lock request timed out\n");
280 			goto err1;
281 		}
282 	}
283 
284 	/* Clearing PLL_GO bit */
285 	REG_FLD_MOD(dss, DSS_PLL_CONTROL, 0, 28, 28);
286 
287 	/* Waiting for PLL to lock */
288 	timeout = jiffies + msecs_to_jiffies(500);
289 	while (!(dss_read_reg(dss, DSS_SDI_STATUS) & (1 << 5))) {
290 		if (time_after_eq(jiffies, timeout)) {
291 			DSSERR("PLL lock timed out\n");
292 			goto err1;
293 		}
294 	}
295 
296 	dispc_lcd_enable_signal(dss->dispc, 1);
297 
298 	/* Waiting for SDI reset to complete */
299 	timeout = jiffies + msecs_to_jiffies(500);
300 	while (!(dss_read_reg(dss, DSS_SDI_STATUS) & (1 << 2))) {
301 		if (time_after_eq(jiffies, timeout)) {
302 			DSSERR("SDI reset timed out\n");
303 			goto err2;
304 		}
305 	}
306 
307 	return 0;
308 
309  err2:
310 	dispc_lcd_enable_signal(dss->dispc, 0);
311  err1:
312 	/* Reset SDI PLL */
313 	REG_FLD_MOD(dss, DSS_PLL_CONTROL, 0, 18, 18); /* SDI_PLL_SYSRESET */
314 
315 	dispc_pck_free_enable(dss->dispc, 0);
316 
317 	return -ETIMEDOUT;
318 }
319 
dss_sdi_disable(struct dss_device * dss)320 void dss_sdi_disable(struct dss_device *dss)
321 {
322 	dispc_lcd_enable_signal(dss->dispc, 0);
323 
324 	dispc_pck_free_enable(dss->dispc, 0);
325 
326 	/* Reset SDI PLL */
327 	REG_FLD_MOD(dss, DSS_PLL_CONTROL, 0, 18, 18); /* SDI_PLL_SYSRESET */
328 }
329 
dss_get_clk_source_name(enum dss_clk_source clk_src)330 const char *dss_get_clk_source_name(enum dss_clk_source clk_src)
331 {
332 	return dss_generic_clk_source_names[clk_src];
333 }
334 
dss_dump_clocks(struct dss_device * dss,struct seq_file * s)335 static void dss_dump_clocks(struct dss_device *dss, struct seq_file *s)
336 {
337 	const char *fclk_name;
338 	unsigned long fclk_rate;
339 
340 	if (dss_runtime_get(dss))
341 		return;
342 
343 	seq_printf(s, "- DSS -\n");
344 
345 	fclk_name = dss_get_clk_source_name(DSS_CLK_SRC_FCK);
346 	fclk_rate = clk_get_rate(dss->dss_clk);
347 
348 	seq_printf(s, "%s = %lu\n",
349 			fclk_name,
350 			fclk_rate);
351 
352 	dss_runtime_put(dss);
353 }
354 
dss_dump_regs(struct seq_file * s,void * p)355 static int dss_dump_regs(struct seq_file *s, void *p)
356 {
357 	struct dss_device *dss = s->private;
358 
359 #define DUMPREG(dss, r) seq_printf(s, "%-35s %08x\n", #r, dss_read_reg(dss, r))
360 
361 	if (dss_runtime_get(dss))
362 		return 0;
363 
364 	DUMPREG(dss, DSS_REVISION);
365 	DUMPREG(dss, DSS_SYSCONFIG);
366 	DUMPREG(dss, DSS_SYSSTATUS);
367 	DUMPREG(dss, DSS_CONTROL);
368 
369 	if (dss->feat->outputs[OMAP_DSS_CHANNEL_LCD] & OMAP_DSS_OUTPUT_SDI) {
370 		DUMPREG(dss, DSS_SDI_CONTROL);
371 		DUMPREG(dss, DSS_PLL_CONTROL);
372 		DUMPREG(dss, DSS_SDI_STATUS);
373 	}
374 
375 	dss_runtime_put(dss);
376 #undef DUMPREG
377 	return 0;
378 }
379 
dss_debug_dump_clocks(struct seq_file * s,void * p)380 static int dss_debug_dump_clocks(struct seq_file *s, void *p)
381 {
382 	struct dss_device *dss = s->private;
383 
384 	dss_dump_clocks(dss, s);
385 	dispc_dump_clocks(dss->dispc, s);
386 	return 0;
387 }
388 
dss_get_channel_index(enum omap_channel channel)389 static int dss_get_channel_index(enum omap_channel channel)
390 {
391 	switch (channel) {
392 	case OMAP_DSS_CHANNEL_LCD:
393 		return 0;
394 	case OMAP_DSS_CHANNEL_LCD2:
395 		return 1;
396 	case OMAP_DSS_CHANNEL_LCD3:
397 		return 2;
398 	default:
399 		WARN_ON(1);
400 		return 0;
401 	}
402 }
403 
dss_select_dispc_clk_source(struct dss_device * dss,enum dss_clk_source clk_src)404 static void dss_select_dispc_clk_source(struct dss_device *dss,
405 					enum dss_clk_source clk_src)
406 {
407 	int b;
408 
409 	/*
410 	 * We always use PRCM clock as the DISPC func clock, except on DSS3,
411 	 * where we don't have separate DISPC and LCD clock sources.
412 	 */
413 	if (WARN_ON(dss->feat->has_lcd_clk_src && clk_src != DSS_CLK_SRC_FCK))
414 		return;
415 
416 	switch (clk_src) {
417 	case DSS_CLK_SRC_FCK:
418 		b = 0;
419 		break;
420 	case DSS_CLK_SRC_PLL1_1:
421 		b = 1;
422 		break;
423 	case DSS_CLK_SRC_PLL2_1:
424 		b = 2;
425 		break;
426 	default:
427 		BUG();
428 		return;
429 	}
430 
431 	REG_FLD_MOD(dss, DSS_CONTROL, b,		/* DISPC_CLK_SWITCH */
432 		    dss->feat->dispc_clk_switch.start,
433 		    dss->feat->dispc_clk_switch.end);
434 
435 	dss->dispc_clk_source = clk_src;
436 }
437 
dss_select_dsi_clk_source(struct dss_device * dss,int dsi_module,enum dss_clk_source clk_src)438 void dss_select_dsi_clk_source(struct dss_device *dss, int dsi_module,
439 			       enum dss_clk_source clk_src)
440 {
441 	int b, pos;
442 
443 	switch (clk_src) {
444 	case DSS_CLK_SRC_FCK:
445 		b = 0;
446 		break;
447 	case DSS_CLK_SRC_PLL1_2:
448 		BUG_ON(dsi_module != 0);
449 		b = 1;
450 		break;
451 	case DSS_CLK_SRC_PLL2_2:
452 		BUG_ON(dsi_module != 1);
453 		b = 1;
454 		break;
455 	default:
456 		BUG();
457 		return;
458 	}
459 
460 	pos = dsi_module == 0 ? 1 : 10;
461 	REG_FLD_MOD(dss, DSS_CONTROL, b, pos, pos);	/* DSIx_CLK_SWITCH */
462 
463 	dss->dsi_clk_source[dsi_module] = clk_src;
464 }
465 
dss_lcd_clk_mux_dra7(struct dss_device * dss,enum omap_channel channel,enum dss_clk_source clk_src)466 static int dss_lcd_clk_mux_dra7(struct dss_device *dss,
467 				enum omap_channel channel,
468 				enum dss_clk_source clk_src)
469 {
470 	const u8 ctrl_bits[] = {
471 		[OMAP_DSS_CHANNEL_LCD] = 0,
472 		[OMAP_DSS_CHANNEL_LCD2] = 12,
473 		[OMAP_DSS_CHANNEL_LCD3] = 19,
474 	};
475 
476 	u8 ctrl_bit = ctrl_bits[channel];
477 	int r;
478 
479 	if (clk_src == DSS_CLK_SRC_FCK) {
480 		/* LCDx_CLK_SWITCH */
481 		REG_FLD_MOD(dss, DSS_CONTROL, 0, ctrl_bit, ctrl_bit);
482 		return -EINVAL;
483 	}
484 
485 	r = dss_ctrl_pll_set_control_mux(dss, clk_src, channel);
486 	if (r)
487 		return r;
488 
489 	REG_FLD_MOD(dss, DSS_CONTROL, 1, ctrl_bit, ctrl_bit);
490 
491 	return 0;
492 }
493 
dss_lcd_clk_mux_omap5(struct dss_device * dss,enum omap_channel channel,enum dss_clk_source clk_src)494 static int dss_lcd_clk_mux_omap5(struct dss_device *dss,
495 				 enum omap_channel channel,
496 				 enum dss_clk_source clk_src)
497 {
498 	const u8 ctrl_bits[] = {
499 		[OMAP_DSS_CHANNEL_LCD] = 0,
500 		[OMAP_DSS_CHANNEL_LCD2] = 12,
501 		[OMAP_DSS_CHANNEL_LCD3] = 19,
502 	};
503 	const enum dss_clk_source allowed_plls[] = {
504 		[OMAP_DSS_CHANNEL_LCD] = DSS_CLK_SRC_PLL1_1,
505 		[OMAP_DSS_CHANNEL_LCD2] = DSS_CLK_SRC_FCK,
506 		[OMAP_DSS_CHANNEL_LCD3] = DSS_CLK_SRC_PLL2_1,
507 	};
508 
509 	u8 ctrl_bit = ctrl_bits[channel];
510 
511 	if (clk_src == DSS_CLK_SRC_FCK) {
512 		/* LCDx_CLK_SWITCH */
513 		REG_FLD_MOD(dss, DSS_CONTROL, 0, ctrl_bit, ctrl_bit);
514 		return -EINVAL;
515 	}
516 
517 	if (WARN_ON(allowed_plls[channel] != clk_src))
518 		return -EINVAL;
519 
520 	REG_FLD_MOD(dss, DSS_CONTROL, 1, ctrl_bit, ctrl_bit);
521 
522 	return 0;
523 }
524 
dss_lcd_clk_mux_omap4(struct dss_device * dss,enum omap_channel channel,enum dss_clk_source clk_src)525 static int dss_lcd_clk_mux_omap4(struct dss_device *dss,
526 				 enum omap_channel channel,
527 				 enum dss_clk_source clk_src)
528 {
529 	const u8 ctrl_bits[] = {
530 		[OMAP_DSS_CHANNEL_LCD] = 0,
531 		[OMAP_DSS_CHANNEL_LCD2] = 12,
532 	};
533 	const enum dss_clk_source allowed_plls[] = {
534 		[OMAP_DSS_CHANNEL_LCD] = DSS_CLK_SRC_PLL1_1,
535 		[OMAP_DSS_CHANNEL_LCD2] = DSS_CLK_SRC_PLL2_1,
536 	};
537 
538 	u8 ctrl_bit = ctrl_bits[channel];
539 
540 	if (clk_src == DSS_CLK_SRC_FCK) {
541 		/* LCDx_CLK_SWITCH */
542 		REG_FLD_MOD(dss, DSS_CONTROL, 0, ctrl_bit, ctrl_bit);
543 		return 0;
544 	}
545 
546 	if (WARN_ON(allowed_plls[channel] != clk_src))
547 		return -EINVAL;
548 
549 	REG_FLD_MOD(dss, DSS_CONTROL, 1, ctrl_bit, ctrl_bit);
550 
551 	return 0;
552 }
553 
dss_select_lcd_clk_source(struct dss_device * dss,enum omap_channel channel,enum dss_clk_source clk_src)554 void dss_select_lcd_clk_source(struct dss_device *dss,
555 			       enum omap_channel channel,
556 			       enum dss_clk_source clk_src)
557 {
558 	int idx = dss_get_channel_index(channel);
559 	int r;
560 
561 	if (!dss->feat->has_lcd_clk_src) {
562 		dss_select_dispc_clk_source(dss, clk_src);
563 		dss->lcd_clk_source[idx] = clk_src;
564 		return;
565 	}
566 
567 	r = dss->feat->ops->select_lcd_source(dss, channel, clk_src);
568 	if (r)
569 		return;
570 
571 	dss->lcd_clk_source[idx] = clk_src;
572 }
573 
dss_get_dispc_clk_source(struct dss_device * dss)574 enum dss_clk_source dss_get_dispc_clk_source(struct dss_device *dss)
575 {
576 	return dss->dispc_clk_source;
577 }
578 
dss_get_dsi_clk_source(struct dss_device * dss,int dsi_module)579 enum dss_clk_source dss_get_dsi_clk_source(struct dss_device *dss,
580 					   int dsi_module)
581 {
582 	return dss->dsi_clk_source[dsi_module];
583 }
584 
dss_get_lcd_clk_source(struct dss_device * dss,enum omap_channel channel)585 enum dss_clk_source dss_get_lcd_clk_source(struct dss_device *dss,
586 					   enum omap_channel channel)
587 {
588 	if (dss->feat->has_lcd_clk_src) {
589 		int idx = dss_get_channel_index(channel);
590 		return dss->lcd_clk_source[idx];
591 	} else {
592 		/* LCD_CLK source is the same as DISPC_FCLK source for
593 		 * OMAP2 and OMAP3 */
594 		return dss->dispc_clk_source;
595 	}
596 }
597 
dss_div_calc(struct dss_device * dss,unsigned long pck,unsigned long fck_min,dss_div_calc_func func,void * data)598 bool dss_div_calc(struct dss_device *dss, unsigned long pck,
599 		  unsigned long fck_min, dss_div_calc_func func, void *data)
600 {
601 	int fckd, fckd_start, fckd_stop;
602 	unsigned long fck;
603 	unsigned long fck_hw_max;
604 	unsigned long fckd_hw_max;
605 	unsigned long prate;
606 	unsigned int m;
607 
608 	fck_hw_max = dss->feat->fck_freq_max;
609 
610 	if (dss->parent_clk == NULL) {
611 		unsigned int pckd;
612 
613 		pckd = fck_hw_max / pck;
614 
615 		fck = pck * pckd;
616 
617 		fck = clk_round_rate(dss->dss_clk, fck);
618 
619 		return func(fck, data);
620 	}
621 
622 	fckd_hw_max = dss->feat->fck_div_max;
623 
624 	m = dss->feat->dss_fck_multiplier;
625 	prate = clk_get_rate(dss->parent_clk);
626 
627 	fck_min = fck_min ? fck_min : 1;
628 
629 	fckd_start = min(prate * m / fck_min, fckd_hw_max);
630 	fckd_stop = max(DIV_ROUND_UP(prate * m, fck_hw_max), 1ul);
631 
632 	for (fckd = fckd_start; fckd >= fckd_stop; --fckd) {
633 		fck = DIV_ROUND_UP(prate, fckd) * m;
634 
635 		if (func(fck, data))
636 			return true;
637 	}
638 
639 	return false;
640 }
641 
dss_set_fck_rate(struct dss_device * dss,unsigned long rate)642 int dss_set_fck_rate(struct dss_device *dss, unsigned long rate)
643 {
644 	int r;
645 
646 	DSSDBG("set fck to %lu\n", rate);
647 
648 	r = clk_set_rate(dss->dss_clk, rate);
649 	if (r)
650 		return r;
651 
652 	dss->dss_clk_rate = clk_get_rate(dss->dss_clk);
653 
654 	WARN_ONCE(dss->dss_clk_rate != rate, "clk rate mismatch: %lu != %lu",
655 		  dss->dss_clk_rate, rate);
656 
657 	return 0;
658 }
659 
dss_get_dispc_clk_rate(struct dss_device * dss)660 unsigned long dss_get_dispc_clk_rate(struct dss_device *dss)
661 {
662 	return dss->dss_clk_rate;
663 }
664 
dss_get_max_fck_rate(struct dss_device * dss)665 unsigned long dss_get_max_fck_rate(struct dss_device *dss)
666 {
667 	return dss->feat->fck_freq_max;
668 }
669 
dss_setup_default_clock(struct dss_device * dss)670 static int dss_setup_default_clock(struct dss_device *dss)
671 {
672 	unsigned long max_dss_fck, prate;
673 	unsigned long fck;
674 	unsigned int fck_div;
675 	int r;
676 
677 	max_dss_fck = dss->feat->fck_freq_max;
678 
679 	if (dss->parent_clk == NULL) {
680 		fck = clk_round_rate(dss->dss_clk, max_dss_fck);
681 	} else {
682 		prate = clk_get_rate(dss->parent_clk);
683 
684 		fck_div = DIV_ROUND_UP(prate * dss->feat->dss_fck_multiplier,
685 				max_dss_fck);
686 		fck = DIV_ROUND_UP(prate, fck_div)
687 		    * dss->feat->dss_fck_multiplier;
688 	}
689 
690 	r = dss_set_fck_rate(dss, fck);
691 	if (r)
692 		return r;
693 
694 	return 0;
695 }
696 
dss_set_venc_output(struct dss_device * dss,enum omap_dss_venc_type type)697 void dss_set_venc_output(struct dss_device *dss, enum omap_dss_venc_type type)
698 {
699 	int l = 0;
700 
701 	if (type == OMAP_DSS_VENC_TYPE_COMPOSITE)
702 		l = 0;
703 	else if (type == OMAP_DSS_VENC_TYPE_SVIDEO)
704 		l = 1;
705 	else
706 		BUG();
707 
708 	/* venc out selection. 0 = comp, 1 = svideo */
709 	REG_FLD_MOD(dss, DSS_CONTROL, l, 6, 6);
710 }
711 
dss_set_dac_pwrdn_bgz(struct dss_device * dss,bool enable)712 void dss_set_dac_pwrdn_bgz(struct dss_device *dss, bool enable)
713 {
714 	/* DAC Power-Down Control */
715 	REG_FLD_MOD(dss, DSS_CONTROL, enable, 5, 5);
716 }
717 
dss_select_hdmi_venc_clk_source(struct dss_device * dss,enum dss_hdmi_venc_clk_source_select src)718 void dss_select_hdmi_venc_clk_source(struct dss_device *dss,
719 				     enum dss_hdmi_venc_clk_source_select src)
720 {
721 	enum omap_dss_output_id outputs;
722 
723 	outputs = dss->feat->outputs[OMAP_DSS_CHANNEL_DIGIT];
724 
725 	/* Complain about invalid selections */
726 	WARN_ON((src == DSS_VENC_TV_CLK) && !(outputs & OMAP_DSS_OUTPUT_VENC));
727 	WARN_ON((src == DSS_HDMI_M_PCLK) && !(outputs & OMAP_DSS_OUTPUT_HDMI));
728 
729 	/* Select only if we have options */
730 	if ((outputs & OMAP_DSS_OUTPUT_VENC) &&
731 	    (outputs & OMAP_DSS_OUTPUT_HDMI))
732 		/* VENC_HDMI_SWITCH */
733 		REG_FLD_MOD(dss, DSS_CONTROL, src, 15, 15);
734 }
735 
dss_dpi_select_source_omap2_omap3(struct dss_device * dss,int port,enum omap_channel channel)736 static int dss_dpi_select_source_omap2_omap3(struct dss_device *dss, int port,
737 					     enum omap_channel channel)
738 {
739 	if (channel != OMAP_DSS_CHANNEL_LCD)
740 		return -EINVAL;
741 
742 	return 0;
743 }
744 
dss_dpi_select_source_omap4(struct dss_device * dss,int port,enum omap_channel channel)745 static int dss_dpi_select_source_omap4(struct dss_device *dss, int port,
746 				       enum omap_channel channel)
747 {
748 	int val;
749 
750 	switch (channel) {
751 	case OMAP_DSS_CHANNEL_LCD2:
752 		val = 0;
753 		break;
754 	case OMAP_DSS_CHANNEL_DIGIT:
755 		val = 1;
756 		break;
757 	default:
758 		return -EINVAL;
759 	}
760 
761 	REG_FLD_MOD(dss, DSS_CONTROL, val, 17, 17);
762 
763 	return 0;
764 }
765 
dss_dpi_select_source_omap5(struct dss_device * dss,int port,enum omap_channel channel)766 static int dss_dpi_select_source_omap5(struct dss_device *dss, int port,
767 				       enum omap_channel channel)
768 {
769 	int val;
770 
771 	switch (channel) {
772 	case OMAP_DSS_CHANNEL_LCD:
773 		val = 1;
774 		break;
775 	case OMAP_DSS_CHANNEL_LCD2:
776 		val = 2;
777 		break;
778 	case OMAP_DSS_CHANNEL_LCD3:
779 		val = 3;
780 		break;
781 	case OMAP_DSS_CHANNEL_DIGIT:
782 		val = 0;
783 		break;
784 	default:
785 		return -EINVAL;
786 	}
787 
788 	REG_FLD_MOD(dss, DSS_CONTROL, val, 17, 16);
789 
790 	return 0;
791 }
792 
dss_dpi_select_source_dra7xx(struct dss_device * dss,int port,enum omap_channel channel)793 static int dss_dpi_select_source_dra7xx(struct dss_device *dss, int port,
794 					enum omap_channel channel)
795 {
796 	switch (port) {
797 	case 0:
798 		return dss_dpi_select_source_omap5(dss, port, channel);
799 	case 1:
800 		if (channel != OMAP_DSS_CHANNEL_LCD2)
801 			return -EINVAL;
802 		break;
803 	case 2:
804 		if (channel != OMAP_DSS_CHANNEL_LCD3)
805 			return -EINVAL;
806 		break;
807 	default:
808 		return -EINVAL;
809 	}
810 
811 	return 0;
812 }
813 
dss_dpi_select_source(struct dss_device * dss,int port,enum omap_channel channel)814 int dss_dpi_select_source(struct dss_device *dss, int port,
815 			  enum omap_channel channel)
816 {
817 	return dss->feat->ops->dpi_select_source(dss, port, channel);
818 }
819 
dss_get_clocks(struct dss_device * dss)820 static int dss_get_clocks(struct dss_device *dss)
821 {
822 	struct clk *clk;
823 
824 	clk = devm_clk_get(&dss->pdev->dev, "fck");
825 	if (IS_ERR(clk)) {
826 		DSSERR("can't get clock fck\n");
827 		return PTR_ERR(clk);
828 	}
829 
830 	dss->dss_clk = clk;
831 
832 	if (dss->feat->parent_clk_name) {
833 		clk = clk_get(NULL, dss->feat->parent_clk_name);
834 		if (IS_ERR(clk)) {
835 			DSSERR("Failed to get %s\n",
836 			       dss->feat->parent_clk_name);
837 			return PTR_ERR(clk);
838 		}
839 	} else {
840 		clk = NULL;
841 	}
842 
843 	dss->parent_clk = clk;
844 
845 	return 0;
846 }
847 
dss_put_clocks(struct dss_device * dss)848 static void dss_put_clocks(struct dss_device *dss)
849 {
850 	if (dss->parent_clk)
851 		clk_put(dss->parent_clk);
852 }
853 
dss_runtime_get(struct dss_device * dss)854 int dss_runtime_get(struct dss_device *dss)
855 {
856 	int r;
857 
858 	DSSDBG("dss_runtime_get\n");
859 
860 	r = pm_runtime_get_sync(&dss->pdev->dev);
861 	if (WARN_ON(r < 0)) {
862 		pm_runtime_put_noidle(&dss->pdev->dev);
863 		return r;
864 	}
865 	return 0;
866 }
867 
dss_runtime_put(struct dss_device * dss)868 void dss_runtime_put(struct dss_device *dss)
869 {
870 	int r;
871 
872 	DSSDBG("dss_runtime_put\n");
873 
874 	r = pm_runtime_put_sync(&dss->pdev->dev);
875 	WARN_ON(r < 0 && r != -ENOSYS && r != -EBUSY);
876 }
877 
dss_get_device(struct device * dev)878 struct dss_device *dss_get_device(struct device *dev)
879 {
880 	return dev_get_drvdata(dev);
881 }
882 
883 /* DEBUGFS */
884 #if defined(CONFIG_OMAP2_DSS_DEBUGFS)
dss_initialize_debugfs(struct dss_device * dss)885 static int dss_initialize_debugfs(struct dss_device *dss)
886 {
887 	struct dentry *dir;
888 
889 	dir = debugfs_create_dir("omapdss", NULL);
890 	if (IS_ERR(dir))
891 		return PTR_ERR(dir);
892 
893 	dss->debugfs.root = dir;
894 
895 	return 0;
896 }
897 
dss_uninitialize_debugfs(struct dss_device * dss)898 static void dss_uninitialize_debugfs(struct dss_device *dss)
899 {
900 	debugfs_remove_recursive(dss->debugfs.root);
901 }
902 
903 struct dss_debugfs_entry {
904 	struct dentry *dentry;
905 	int (*show_fn)(struct seq_file *s, void *data);
906 	void *data;
907 };
908 
dss_debug_open(struct inode * inode,struct file * file)909 static int dss_debug_open(struct inode *inode, struct file *file)
910 {
911 	struct dss_debugfs_entry *entry = inode->i_private;
912 
913 	return single_open(file, entry->show_fn, entry->data);
914 }
915 
916 static const struct file_operations dss_debug_fops = {
917 	.open		= dss_debug_open,
918 	.read		= seq_read,
919 	.llseek		= seq_lseek,
920 	.release	= single_release,
921 };
922 
923 struct dss_debugfs_entry *
dss_debugfs_create_file(struct dss_device * dss,const char * name,int (* show_fn)(struct seq_file * s,void * data),void * data)924 dss_debugfs_create_file(struct dss_device *dss, const char *name,
925 			int (*show_fn)(struct seq_file *s, void *data),
926 			void *data)
927 {
928 	struct dss_debugfs_entry *entry;
929 
930 	entry = kzalloc(sizeof(*entry), GFP_KERNEL);
931 	if (!entry)
932 		return ERR_PTR(-ENOMEM);
933 
934 	entry->show_fn = show_fn;
935 	entry->data = data;
936 	entry->dentry = debugfs_create_file(name, 0444, dss->debugfs.root,
937 					    entry, &dss_debug_fops);
938 
939 	return entry;
940 }
941 
dss_debugfs_remove_file(struct dss_debugfs_entry * entry)942 void dss_debugfs_remove_file(struct dss_debugfs_entry *entry)
943 {
944 	if (IS_ERR_OR_NULL(entry))
945 		return;
946 
947 	debugfs_remove(entry->dentry);
948 	kfree(entry);
949 }
950 
951 #else /* CONFIG_OMAP2_DSS_DEBUGFS */
dss_initialize_debugfs(struct dss_device * dss)952 static inline int dss_initialize_debugfs(struct dss_device *dss)
953 {
954 	return 0;
955 }
dss_uninitialize_debugfs(struct dss_device * dss)956 static inline void dss_uninitialize_debugfs(struct dss_device *dss)
957 {
958 }
959 #endif /* CONFIG_OMAP2_DSS_DEBUGFS */
960 
961 static const struct dss_ops dss_ops_omap2_omap3 = {
962 	.dpi_select_source = &dss_dpi_select_source_omap2_omap3,
963 };
964 
965 static const struct dss_ops dss_ops_omap4 = {
966 	.dpi_select_source = &dss_dpi_select_source_omap4,
967 	.select_lcd_source = &dss_lcd_clk_mux_omap4,
968 };
969 
970 static const struct dss_ops dss_ops_omap5 = {
971 	.dpi_select_source = &dss_dpi_select_source_omap5,
972 	.select_lcd_source = &dss_lcd_clk_mux_omap5,
973 };
974 
975 static const struct dss_ops dss_ops_dra7 = {
976 	.dpi_select_source = &dss_dpi_select_source_dra7xx,
977 	.select_lcd_source = &dss_lcd_clk_mux_dra7,
978 };
979 
980 static const enum omap_display_type omap2plus_ports[] = {
981 	OMAP_DISPLAY_TYPE_DPI,
982 };
983 
984 static const enum omap_display_type omap34xx_ports[] = {
985 	OMAP_DISPLAY_TYPE_DPI,
986 	OMAP_DISPLAY_TYPE_SDI,
987 };
988 
989 static const enum omap_display_type dra7xx_ports[] = {
990 	OMAP_DISPLAY_TYPE_DPI,
991 	OMAP_DISPLAY_TYPE_DPI,
992 	OMAP_DISPLAY_TYPE_DPI,
993 };
994 
995 static const enum omap_dss_output_id omap2_dss_supported_outputs[] = {
996 	/* OMAP_DSS_CHANNEL_LCD */
997 	OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI,
998 
999 	/* OMAP_DSS_CHANNEL_DIGIT */
1000 	OMAP_DSS_OUTPUT_VENC,
1001 };
1002 
1003 static const enum omap_dss_output_id omap3430_dss_supported_outputs[] = {
1004 	/* OMAP_DSS_CHANNEL_LCD */
1005 	OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
1006 	OMAP_DSS_OUTPUT_SDI | OMAP_DSS_OUTPUT_DSI1,
1007 
1008 	/* OMAP_DSS_CHANNEL_DIGIT */
1009 	OMAP_DSS_OUTPUT_VENC,
1010 };
1011 
1012 static const enum omap_dss_output_id omap3630_dss_supported_outputs[] = {
1013 	/* OMAP_DSS_CHANNEL_LCD */
1014 	OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
1015 	OMAP_DSS_OUTPUT_DSI1,
1016 
1017 	/* OMAP_DSS_CHANNEL_DIGIT */
1018 	OMAP_DSS_OUTPUT_VENC,
1019 };
1020 
1021 static const enum omap_dss_output_id am43xx_dss_supported_outputs[] = {
1022 	/* OMAP_DSS_CHANNEL_LCD */
1023 	OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI,
1024 };
1025 
1026 static const enum omap_dss_output_id omap4_dss_supported_outputs[] = {
1027 	/* OMAP_DSS_CHANNEL_LCD */
1028 	OMAP_DSS_OUTPUT_DBI | OMAP_DSS_OUTPUT_DSI1,
1029 
1030 	/* OMAP_DSS_CHANNEL_DIGIT */
1031 	OMAP_DSS_OUTPUT_VENC | OMAP_DSS_OUTPUT_HDMI,
1032 
1033 	/* OMAP_DSS_CHANNEL_LCD2 */
1034 	OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
1035 	OMAP_DSS_OUTPUT_DSI2,
1036 };
1037 
1038 static const enum omap_dss_output_id omap5_dss_supported_outputs[] = {
1039 	/* OMAP_DSS_CHANNEL_LCD */
1040 	OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
1041 	OMAP_DSS_OUTPUT_DSI1 | OMAP_DSS_OUTPUT_DSI2,
1042 
1043 	/* OMAP_DSS_CHANNEL_DIGIT */
1044 	OMAP_DSS_OUTPUT_HDMI,
1045 
1046 	/* OMAP_DSS_CHANNEL_LCD2 */
1047 	OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
1048 	OMAP_DSS_OUTPUT_DSI1,
1049 
1050 	/* OMAP_DSS_CHANNEL_LCD3 */
1051 	OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
1052 	OMAP_DSS_OUTPUT_DSI2,
1053 };
1054 
1055 static const struct dss_features omap24xx_dss_feats = {
1056 	.model			=	DSS_MODEL_OMAP2,
1057 	/*
1058 	 * fck div max is really 16, but the divider range has gaps. The range
1059 	 * from 1 to 6 has no gaps, so let's use that as a max.
1060 	 */
1061 	.fck_div_max		=	6,
1062 	.fck_freq_max		=	133000000,
1063 	.dss_fck_multiplier	=	2,
1064 	.parent_clk_name	=	"core_ck",
1065 	.ports			=	omap2plus_ports,
1066 	.num_ports		=	ARRAY_SIZE(omap2plus_ports),
1067 	.outputs		=	omap2_dss_supported_outputs,
1068 	.ops			=	&dss_ops_omap2_omap3,
1069 	.dispc_clk_switch	=	{ 0, 0 },
1070 	.has_lcd_clk_src	=	false,
1071 };
1072 
1073 static const struct dss_features omap34xx_dss_feats = {
1074 	.model			=	DSS_MODEL_OMAP3,
1075 	.fck_div_max		=	16,
1076 	.fck_freq_max		=	173000000,
1077 	.dss_fck_multiplier	=	2,
1078 	.parent_clk_name	=	"dpll4_ck",
1079 	.ports			=	omap34xx_ports,
1080 	.outputs		=	omap3430_dss_supported_outputs,
1081 	.num_ports		=	ARRAY_SIZE(omap34xx_ports),
1082 	.ops			=	&dss_ops_omap2_omap3,
1083 	.dispc_clk_switch	=	{ 0, 0 },
1084 	.has_lcd_clk_src	=	false,
1085 };
1086 
1087 static const struct dss_features omap3630_dss_feats = {
1088 	.model			=	DSS_MODEL_OMAP3,
1089 	.fck_div_max		=	31,
1090 	.fck_freq_max		=	173000000,
1091 	.dss_fck_multiplier	=	1,
1092 	.parent_clk_name	=	"dpll4_ck",
1093 	.ports			=	omap2plus_ports,
1094 	.num_ports		=	ARRAY_SIZE(omap2plus_ports),
1095 	.outputs		=	omap3630_dss_supported_outputs,
1096 	.ops			=	&dss_ops_omap2_omap3,
1097 	.dispc_clk_switch	=	{ 0, 0 },
1098 	.has_lcd_clk_src	=	false,
1099 };
1100 
1101 static const struct dss_features omap44xx_dss_feats = {
1102 	.model			=	DSS_MODEL_OMAP4,
1103 	.fck_div_max		=	32,
1104 	.fck_freq_max		=	186000000,
1105 	.dss_fck_multiplier	=	1,
1106 	.parent_clk_name	=	"dpll_per_x2_ck",
1107 	.ports			=	omap2plus_ports,
1108 	.num_ports		=	ARRAY_SIZE(omap2plus_ports),
1109 	.outputs		=	omap4_dss_supported_outputs,
1110 	.ops			=	&dss_ops_omap4,
1111 	.dispc_clk_switch	=	{ 9, 8 },
1112 	.has_lcd_clk_src	=	true,
1113 };
1114 
1115 static const struct dss_features omap54xx_dss_feats = {
1116 	.model			=	DSS_MODEL_OMAP5,
1117 	.fck_div_max		=	64,
1118 	.fck_freq_max		=	209250000,
1119 	.dss_fck_multiplier	=	1,
1120 	.parent_clk_name	=	"dpll_per_x2_ck",
1121 	.ports			=	omap2plus_ports,
1122 	.num_ports		=	ARRAY_SIZE(omap2plus_ports),
1123 	.outputs		=	omap5_dss_supported_outputs,
1124 	.ops			=	&dss_ops_omap5,
1125 	.dispc_clk_switch	=	{ 9, 7 },
1126 	.has_lcd_clk_src	=	true,
1127 };
1128 
1129 static const struct dss_features am43xx_dss_feats = {
1130 	.model			=	DSS_MODEL_OMAP3,
1131 	.fck_div_max		=	0,
1132 	.fck_freq_max		=	200000000,
1133 	.dss_fck_multiplier	=	0,
1134 	.parent_clk_name	=	NULL,
1135 	.ports			=	omap2plus_ports,
1136 	.num_ports		=	ARRAY_SIZE(omap2plus_ports),
1137 	.outputs		=	am43xx_dss_supported_outputs,
1138 	.ops			=	&dss_ops_omap2_omap3,
1139 	.dispc_clk_switch	=	{ 0, 0 },
1140 	.has_lcd_clk_src	=	true,
1141 };
1142 
1143 static const struct dss_features dra7xx_dss_feats = {
1144 	.model			=	DSS_MODEL_DRA7,
1145 	.fck_div_max		=	64,
1146 	.fck_freq_max		=	209250000,
1147 	.dss_fck_multiplier	=	1,
1148 	.parent_clk_name	=	"dpll_per_x2_ck",
1149 	.ports			=	dra7xx_ports,
1150 	.num_ports		=	ARRAY_SIZE(dra7xx_ports),
1151 	.outputs		=	omap5_dss_supported_outputs,
1152 	.ops			=	&dss_ops_dra7,
1153 	.dispc_clk_switch	=	{ 9, 7 },
1154 	.has_lcd_clk_src	=	true,
1155 };
1156 
__dss_uninit_ports(struct dss_device * dss,unsigned int num_ports)1157 static void __dss_uninit_ports(struct dss_device *dss, unsigned int num_ports)
1158 {
1159 	struct platform_device *pdev = dss->pdev;
1160 	struct device_node *parent = pdev->dev.of_node;
1161 	struct device_node *port;
1162 	unsigned int i;
1163 
1164 	for (i = 0; i < num_ports; i++) {
1165 		port = of_graph_get_port_by_id(parent, i);
1166 		if (!port)
1167 			continue;
1168 
1169 		switch (dss->feat->ports[i]) {
1170 		case OMAP_DISPLAY_TYPE_DPI:
1171 			dpi_uninit_port(port);
1172 			break;
1173 		case OMAP_DISPLAY_TYPE_SDI:
1174 			sdi_uninit_port(port);
1175 			break;
1176 		default:
1177 			break;
1178 		}
1179 		of_node_put(port);
1180 	}
1181 }
1182 
dss_init_ports(struct dss_device * dss)1183 static int dss_init_ports(struct dss_device *dss)
1184 {
1185 	struct platform_device *pdev = dss->pdev;
1186 	struct device_node *parent = pdev->dev.of_node;
1187 	struct device_node *port;
1188 	unsigned int i;
1189 	int r;
1190 
1191 	for (i = 0; i < dss->feat->num_ports; i++) {
1192 		port = of_graph_get_port_by_id(parent, i);
1193 		if (!port)
1194 			continue;
1195 
1196 		switch (dss->feat->ports[i]) {
1197 		case OMAP_DISPLAY_TYPE_DPI:
1198 			r = dpi_init_port(dss, pdev, port, dss->feat->model);
1199 			if (r)
1200 				goto error;
1201 			break;
1202 
1203 		case OMAP_DISPLAY_TYPE_SDI:
1204 			r = sdi_init_port(dss, pdev, port);
1205 			if (r)
1206 				goto error;
1207 			break;
1208 
1209 		default:
1210 			break;
1211 		}
1212 		of_node_put(port);
1213 	}
1214 
1215 	return 0;
1216 
1217 error:
1218 	of_node_put(port);
1219 	__dss_uninit_ports(dss, i);
1220 	return r;
1221 }
1222 
dss_uninit_ports(struct dss_device * dss)1223 static void dss_uninit_ports(struct dss_device *dss)
1224 {
1225 	__dss_uninit_ports(dss, dss->feat->num_ports);
1226 }
1227 
dss_video_pll_probe(struct dss_device * dss)1228 static int dss_video_pll_probe(struct dss_device *dss)
1229 {
1230 	struct platform_device *pdev = dss->pdev;
1231 	struct device_node *np = pdev->dev.of_node;
1232 	struct regulator *pll_regulator;
1233 	int r;
1234 
1235 	if (!np)
1236 		return 0;
1237 
1238 	if (of_property_read_bool(np, "syscon-pll-ctrl")) {
1239 		dss->syscon_pll_ctrl = syscon_regmap_lookup_by_phandle(np,
1240 			"syscon-pll-ctrl");
1241 		if (IS_ERR(dss->syscon_pll_ctrl)) {
1242 			dev_err(&pdev->dev,
1243 				"failed to get syscon-pll-ctrl regmap\n");
1244 			return PTR_ERR(dss->syscon_pll_ctrl);
1245 		}
1246 
1247 		if (of_property_read_u32_index(np, "syscon-pll-ctrl", 1,
1248 				&dss->syscon_pll_ctrl_offset)) {
1249 			dev_err(&pdev->dev,
1250 				"failed to get syscon-pll-ctrl offset\n");
1251 			return -EINVAL;
1252 		}
1253 	}
1254 
1255 	pll_regulator = devm_regulator_get(&pdev->dev, "vdda_video");
1256 	if (IS_ERR(pll_regulator)) {
1257 		r = PTR_ERR(pll_regulator);
1258 
1259 		switch (r) {
1260 		case -ENOENT:
1261 			pll_regulator = NULL;
1262 			break;
1263 
1264 		case -EPROBE_DEFER:
1265 			return -EPROBE_DEFER;
1266 
1267 		default:
1268 			DSSERR("can't get DPLL VDDA regulator\n");
1269 			return r;
1270 		}
1271 	}
1272 
1273 	if (of_property_match_string(np, "reg-names", "pll1") >= 0) {
1274 		dss->video1_pll = dss_video_pll_init(dss, pdev, 0,
1275 						     pll_regulator);
1276 		if (IS_ERR(dss->video1_pll))
1277 			return PTR_ERR(dss->video1_pll);
1278 	}
1279 
1280 	if (of_property_match_string(np, "reg-names", "pll2") >= 0) {
1281 		dss->video2_pll = dss_video_pll_init(dss, pdev, 1,
1282 						     pll_regulator);
1283 		if (IS_ERR(dss->video2_pll)) {
1284 			dss_video_pll_uninit(dss->video1_pll);
1285 			return PTR_ERR(dss->video2_pll);
1286 		}
1287 	}
1288 
1289 	return 0;
1290 }
1291 
1292 /* DSS HW IP initialisation */
1293 static const struct of_device_id dss_of_match[] = {
1294 	{ .compatible = "ti,omap2-dss", .data = &omap24xx_dss_feats },
1295 	{ .compatible = "ti,omap3-dss", .data = &omap3630_dss_feats },
1296 	{ .compatible = "ti,omap4-dss", .data = &omap44xx_dss_feats },
1297 	{ .compatible = "ti,omap5-dss", .data = &omap54xx_dss_feats },
1298 	{ .compatible = "ti,dra7-dss",  .data = &dra7xx_dss_feats },
1299 	{},
1300 };
1301 MODULE_DEVICE_TABLE(of, dss_of_match);
1302 
1303 static const struct soc_device_attribute dss_soc_devices[] = {
1304 	{ .machine = "OMAP3430/3530", .data = &omap34xx_dss_feats },
1305 	{ .machine = "AM35??",        .data = &omap34xx_dss_feats },
1306 	{ .family  = "AM43xx",        .data = &am43xx_dss_feats },
1307 	{ /* sentinel */ }
1308 };
1309 
dss_bind(struct device * dev)1310 static int dss_bind(struct device *dev)
1311 {
1312 	struct dss_device *dss = dev_get_drvdata(dev);
1313 	struct platform_device *drm_pdev;
1314 	struct dss_pdata pdata;
1315 	int r;
1316 
1317 	r = component_bind_all(dev, NULL);
1318 	if (r)
1319 		return r;
1320 
1321 	pm_set_vt_switch(0);
1322 
1323 	pdata.dss = dss;
1324 	drm_pdev = platform_device_register_data(NULL, "omapdrm", 0,
1325 						 &pdata, sizeof(pdata));
1326 	if (IS_ERR(drm_pdev)) {
1327 		component_unbind_all(dev, NULL);
1328 		return PTR_ERR(drm_pdev);
1329 	}
1330 
1331 	dss->drm_pdev = drm_pdev;
1332 
1333 	return 0;
1334 }
1335 
dss_unbind(struct device * dev)1336 static void dss_unbind(struct device *dev)
1337 {
1338 	struct dss_device *dss = dev_get_drvdata(dev);
1339 
1340 	platform_device_unregister(dss->drm_pdev);
1341 
1342 	component_unbind_all(dev, NULL);
1343 }
1344 
1345 static const struct component_master_ops dss_component_ops = {
1346 	.bind = dss_bind,
1347 	.unbind = dss_unbind,
1348 };
1349 
1350 struct dss_component_match_data {
1351 	struct device *dev;
1352 	struct component_match **match;
1353 };
1354 
dss_add_child_component(struct device * dev,void * data)1355 static int dss_add_child_component(struct device *dev, void *data)
1356 {
1357 	struct dss_component_match_data *cmatch = data;
1358 	struct component_match **match = cmatch->match;
1359 
1360 	/*
1361 	 * HACK
1362 	 * We don't have a working driver for rfbi, so skip it here always.
1363 	 * Otherwise dss will never get probed successfully, as it will wait
1364 	 * for rfbi to get probed.
1365 	 */
1366 	if (strstr(dev_name(dev), "rfbi"))
1367 		return 0;
1368 
1369 	/*
1370 	 * Handle possible interconnect target modules defined within the DSS.
1371 	 * The DSS components can be children of an interconnect target module
1372 	 * after the device tree has been updated for the module data.
1373 	 * See also omapdss_boot_init() for compatible fixup.
1374 	 */
1375 	if (strstr(dev_name(dev), "target-module"))
1376 		return device_for_each_child(dev, cmatch,
1377 					     dss_add_child_component);
1378 
1379 	component_match_add(cmatch->dev, match, component_compare_dev, dev);
1380 
1381 	return 0;
1382 }
1383 
dss_probe_hardware(struct dss_device * dss)1384 static int dss_probe_hardware(struct dss_device *dss)
1385 {
1386 	u32 rev;
1387 	int r;
1388 
1389 	r = dss_runtime_get(dss);
1390 	if (r)
1391 		return r;
1392 
1393 	dss->dss_clk_rate = clk_get_rate(dss->dss_clk);
1394 
1395 	/* Select DPLL */
1396 	REG_FLD_MOD(dss, DSS_CONTROL, 0, 0, 0);
1397 
1398 	dss_select_dispc_clk_source(dss, DSS_CLK_SRC_FCK);
1399 
1400 #ifdef CONFIG_OMAP2_DSS_VENC
1401 	REG_FLD_MOD(dss, DSS_CONTROL, 1, 4, 4);	/* venc dac demen */
1402 	REG_FLD_MOD(dss, DSS_CONTROL, 1, 3, 3);	/* venc clock 4x enable */
1403 	REG_FLD_MOD(dss, DSS_CONTROL, 0, 2, 2);	/* venc clock mode = normal */
1404 #endif
1405 	dss->dsi_clk_source[0] = DSS_CLK_SRC_FCK;
1406 	dss->dsi_clk_source[1] = DSS_CLK_SRC_FCK;
1407 	dss->dispc_clk_source = DSS_CLK_SRC_FCK;
1408 	dss->lcd_clk_source[0] = DSS_CLK_SRC_FCK;
1409 	dss->lcd_clk_source[1] = DSS_CLK_SRC_FCK;
1410 
1411 	rev = dss_read_reg(dss, DSS_REVISION);
1412 	pr_info("OMAP DSS rev %d.%d\n", FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
1413 
1414 	dss_runtime_put(dss);
1415 
1416 	return 0;
1417 }
1418 
dss_probe(struct platform_device * pdev)1419 static int dss_probe(struct platform_device *pdev)
1420 {
1421 	const struct soc_device_attribute *soc;
1422 	struct dss_component_match_data cmatch;
1423 	struct component_match *match = NULL;
1424 	struct dss_device *dss;
1425 	int r;
1426 
1427 	dss = kzalloc(sizeof(*dss), GFP_KERNEL);
1428 	if (!dss)
1429 		return -ENOMEM;
1430 
1431 	dss->pdev = pdev;
1432 	platform_set_drvdata(pdev, dss);
1433 
1434 	r = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
1435 	if (r) {
1436 		dev_err(&pdev->dev, "Failed to set the DMA mask\n");
1437 		goto err_free_dss;
1438 	}
1439 
1440 	/*
1441 	 * The various OMAP3-based SoCs can't be told apart using the compatible
1442 	 * string, use SoC device matching.
1443 	 */
1444 	soc = soc_device_match(dss_soc_devices);
1445 	if (soc)
1446 		dss->feat = soc->data;
1447 	else
1448 		dss->feat = of_match_device(dss_of_match, &pdev->dev)->data;
1449 
1450 	/* Map I/O registers, get and setup clocks. */
1451 	dss->base = devm_platform_ioremap_resource(pdev, 0);
1452 	if (IS_ERR(dss->base)) {
1453 		r = PTR_ERR(dss->base);
1454 		goto err_free_dss;
1455 	}
1456 
1457 	r = dss_get_clocks(dss);
1458 	if (r)
1459 		goto err_free_dss;
1460 
1461 	r = dss_setup_default_clock(dss);
1462 	if (r)
1463 		goto err_put_clocks;
1464 
1465 	/* Setup the video PLLs and the DPI and SDI ports. */
1466 	r = dss_video_pll_probe(dss);
1467 	if (r)
1468 		goto err_put_clocks;
1469 
1470 	r = dss_init_ports(dss);
1471 	if (r)
1472 		goto err_uninit_plls;
1473 
1474 	/* Enable runtime PM and probe the hardware. */
1475 	pm_runtime_enable(&pdev->dev);
1476 
1477 	r = dss_probe_hardware(dss);
1478 	if (r)
1479 		goto err_pm_runtime_disable;
1480 
1481 	/* Initialize debugfs. */
1482 	r = dss_initialize_debugfs(dss);
1483 	if (r)
1484 		goto err_pm_runtime_disable;
1485 
1486 	dss->debugfs.clk = dss_debugfs_create_file(dss, "clk",
1487 						   dss_debug_dump_clocks, dss);
1488 	dss->debugfs.dss = dss_debugfs_create_file(dss, "dss", dss_dump_regs,
1489 						   dss);
1490 
1491 	/* Add all the child devices as components. */
1492 	r = of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
1493 	if (r)
1494 		goto err_uninit_debugfs;
1495 
1496 	omapdss_gather_components(&pdev->dev);
1497 
1498 	cmatch.dev = &pdev->dev;
1499 	cmatch.match = &match;
1500 	device_for_each_child(&pdev->dev, &cmatch, dss_add_child_component);
1501 
1502 	r = component_master_add_with_match(&pdev->dev, &dss_component_ops, match);
1503 	if (r)
1504 		goto err_of_depopulate;
1505 
1506 	return 0;
1507 
1508 err_of_depopulate:
1509 	of_platform_depopulate(&pdev->dev);
1510 
1511 err_uninit_debugfs:
1512 	dss_debugfs_remove_file(dss->debugfs.clk);
1513 	dss_debugfs_remove_file(dss->debugfs.dss);
1514 	dss_uninitialize_debugfs(dss);
1515 
1516 err_pm_runtime_disable:
1517 	pm_runtime_disable(&pdev->dev);
1518 	dss_uninit_ports(dss);
1519 
1520 err_uninit_plls:
1521 	if (dss->video1_pll)
1522 		dss_video_pll_uninit(dss->video1_pll);
1523 	if (dss->video2_pll)
1524 		dss_video_pll_uninit(dss->video2_pll);
1525 
1526 err_put_clocks:
1527 	dss_put_clocks(dss);
1528 
1529 err_free_dss:
1530 	kfree(dss);
1531 
1532 	return r;
1533 }
1534 
dss_remove(struct platform_device * pdev)1535 static void dss_remove(struct platform_device *pdev)
1536 {
1537 	struct dss_device *dss = platform_get_drvdata(pdev);
1538 
1539 	of_platform_depopulate(&pdev->dev);
1540 
1541 	component_master_del(&pdev->dev, &dss_component_ops);
1542 
1543 	dss_debugfs_remove_file(dss->debugfs.clk);
1544 	dss_debugfs_remove_file(dss->debugfs.dss);
1545 	dss_uninitialize_debugfs(dss);
1546 
1547 	pm_runtime_disable(&pdev->dev);
1548 
1549 	dss_uninit_ports(dss);
1550 
1551 	if (dss->video1_pll)
1552 		dss_video_pll_uninit(dss->video1_pll);
1553 
1554 	if (dss->video2_pll)
1555 		dss_video_pll_uninit(dss->video2_pll);
1556 
1557 	dss_put_clocks(dss);
1558 
1559 	kfree(dss);
1560 }
1561 
dss_shutdown(struct platform_device * pdev)1562 static void dss_shutdown(struct platform_device *pdev)
1563 {
1564 	DSSDBG("shutdown\n");
1565 }
1566 
dss_runtime_suspend(struct device * dev)1567 static __maybe_unused int dss_runtime_suspend(struct device *dev)
1568 {
1569 	struct dss_device *dss = dev_get_drvdata(dev);
1570 
1571 	dss_save_context(dss);
1572 	dss_set_min_bus_tput(dev, 0);
1573 
1574 	pinctrl_pm_select_sleep_state(dev);
1575 
1576 	return 0;
1577 }
1578 
dss_runtime_resume(struct device * dev)1579 static __maybe_unused int dss_runtime_resume(struct device *dev)
1580 {
1581 	struct dss_device *dss = dev_get_drvdata(dev);
1582 	int r;
1583 
1584 	pinctrl_pm_select_default_state(dev);
1585 
1586 	/*
1587 	 * Set an arbitrarily high tput request to ensure OPP100.
1588 	 * What we should really do is to make a request to stay in OPP100,
1589 	 * without any tput requirements, but that is not currently possible
1590 	 * via the PM layer.
1591 	 */
1592 
1593 	r = dss_set_min_bus_tput(dev, 1000000000);
1594 	if (r)
1595 		return r;
1596 
1597 	dss_restore_context(dss);
1598 	return 0;
1599 }
1600 
1601 static const struct dev_pm_ops dss_pm_ops = {
1602 	SET_RUNTIME_PM_OPS(dss_runtime_suspend, dss_runtime_resume, NULL)
1603 	SET_LATE_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
1604 };
1605 
1606 struct platform_driver omap_dsshw_driver = {
1607 	.probe		= dss_probe,
1608 	.remove_new	= dss_remove,
1609 	.shutdown	= dss_shutdown,
1610 	.driver         = {
1611 		.name   = "omapdss_dss",
1612 		.pm	= &dss_pm_ops,
1613 		.of_match_table = dss_of_match,
1614 		.suppress_bind_attrs = true,
1615 	},
1616 };
1617 
1618 /* INIT */
1619 static struct platform_driver * const omap_dss_drivers[] = {
1620 	&omap_dsshw_driver,
1621 	&omap_dispchw_driver,
1622 #ifdef CONFIG_OMAP2_DSS_DSI
1623 	&omap_dsihw_driver,
1624 #endif
1625 #ifdef CONFIG_OMAP2_DSS_VENC
1626 	&omap_venchw_driver,
1627 #endif
1628 #ifdef CONFIG_OMAP4_DSS_HDMI
1629 	&omapdss_hdmi4hw_driver,
1630 #endif
1631 #ifdef CONFIG_OMAP5_DSS_HDMI
1632 	&omapdss_hdmi5hw_driver,
1633 #endif
1634 };
1635 
omap_dss_init(void)1636 int __init omap_dss_init(void)
1637 {
1638 	return platform_register_drivers(omap_dss_drivers,
1639 					 ARRAY_SIZE(omap_dss_drivers));
1640 }
1641 
omap_dss_exit(void)1642 void omap_dss_exit(void)
1643 {
1644 	platform_unregister_drivers(omap_dss_drivers,
1645 				    ARRAY_SIZE(omap_dss_drivers));
1646 }
1647