1 /*
2  * Copyright (C) 2012 Samsung Electronics
3  *
4  * Author: InKi Dae <inki.dae@samsung.com>
5  * Author: Donghwa Lee <dh09.lee@samsung.com>
6  *
7  * SPDX-License-Identifier:	GPL-2.0+
8  */
9 
10 #include <config.h>
11 #include <common.h>
12 #include <display.h>
13 #include <div64.h>
14 #include <dm.h>
15 #include <fdtdec.h>
16 #include <libfdt.h>
17 #include <panel.h>
18 #include <video.h>
19 #include <video_bridge.h>
20 #include <asm/io.h>
21 #include <asm/arch/cpu.h>
22 #include <asm/arch/clock.h>
23 #include <asm/arch/clk.h>
24 #include <asm/arch/mipi_dsim.h>
25 #include <asm/arch/dp_info.h>
26 #include <asm/arch/fb.h>
27 #include <asm/arch/pinmux.h>
28 #include <asm/arch/system.h>
29 #include <asm/gpio.h>
30 #include <linux/errno.h>
31 
32 DECLARE_GLOBAL_DATA_PTR;
33 
34 enum {
35 	FIMD_RGB_INTERFACE = 1,
36 	FIMD_CPU_INTERFACE = 2,
37 };
38 
39 enum exynos_fb_rgb_mode_t {
40 	MODE_RGB_P = 0,
41 	MODE_BGR_P = 1,
42 	MODE_RGB_S = 2,
43 	MODE_BGR_S = 3,
44 };
45 
46 struct exynos_fb_priv {
47 	ushort vl_col;		/* Number of columns (i.e. 640) */
48 	ushort vl_row;		/* Number of rows (i.e. 480) */
49 	ushort vl_rot;		/* Rotation of Display (0, 1, 2, 3) */
50 	ushort vl_width;	/* Width of display area in millimeters */
51 	ushort vl_height;	/* Height of display area in millimeters */
52 
53 	/* LCD configuration register */
54 	u_char vl_freq;		/* Frequency */
55 	u_char vl_clkp;		/* Clock polarity */
56 	u_char vl_oep;		/* Output Enable polarity */
57 	u_char vl_hsp;		/* Horizontal Sync polarity */
58 	u_char vl_vsp;		/* Vertical Sync polarity */
59 	u_char vl_dp;		/* Data polarity */
60 	u_char vl_bpix;		/* Bits per pixel */
61 
62 	/* Horizontal control register. Timing from data sheet */
63 	u_char vl_hspw;		/* Horz sync pulse width */
64 	u_char vl_hfpd;		/* Wait before of line */
65 	u_char vl_hbpd;		/* Wait end of line */
66 
67 	/* Vertical control register. */
68 	u_char	vl_vspw;	/* Vertical sync pulse width */
69 	u_char	vl_vfpd;	/* Wait before of frame */
70 	u_char	vl_vbpd;	/* Wait end of frame */
71 	u_char  vl_cmd_allow_len; /* Wait end of frame */
72 
73 	unsigned int win_id;
74 	unsigned int init_delay;
75 	unsigned int power_on_delay;
76 	unsigned int reset_delay;
77 	unsigned int interface_mode;
78 	unsigned int mipi_enabled;
79 	unsigned int dp_enabled;
80 	unsigned int cs_setup;
81 	unsigned int wr_setup;
82 	unsigned int wr_act;
83 	unsigned int wr_hold;
84 	unsigned int logo_on;
85 	unsigned int logo_width;
86 	unsigned int logo_height;
87 	int logo_x_offset;
88 	int logo_y_offset;
89 	unsigned long logo_addr;
90 	unsigned int rgb_mode;
91 	unsigned int resolution;
92 
93 	/* parent clock name(MPLL, EPLL or VPLL) */
94 	unsigned int pclk_name;
95 	/* ratio value for source clock from parent clock. */
96 	unsigned int sclk_div;
97 
98 	unsigned int dual_lcd_enabled;
99 	struct exynos_fb *reg;
100 	struct exynos_platform_mipi_dsim *dsim_platform_data_dt;
101 };
102 
103 static void exynos_fimd_set_dualrgb(struct exynos_fb_priv *priv, bool enabled)
104 {
105 	struct exynos_fb *reg = priv->reg;
106 	unsigned int cfg = 0;
107 
108 	if (enabled) {
109 		cfg = EXYNOS_DUALRGB_BYPASS_DUAL | EXYNOS_DUALRGB_LINESPLIT |
110 			EXYNOS_DUALRGB_VDEN_EN_ENABLE;
111 
112 		/* in case of Line Split mode, MAIN_CNT doesn't neet to set. */
113 		cfg |= EXYNOS_DUALRGB_SUB_CNT(priv->vl_col / 2) |
114 			EXYNOS_DUALRGB_MAIN_CNT(0);
115 	}
116 
117 	writel(cfg, &reg->dualrgb);
118 }
119 
120 static void exynos_fimd_set_dp_clkcon(struct exynos_fb_priv *priv,
121 				      unsigned int enabled)
122 {
123 	struct exynos_fb *reg = priv->reg;
124 	unsigned int cfg = 0;
125 
126 	if (enabled)
127 		cfg = EXYNOS_DP_CLK_ENABLE;
128 
129 	writel(cfg, &reg->dp_mie_clkcon);
130 }
131 
132 static void exynos_fimd_set_par(struct exynos_fb_priv *priv,
133 				unsigned int win_id)
134 {
135 	struct exynos_fb *reg = priv->reg;
136 	unsigned int cfg = 0;
137 
138 	/* set window control */
139 	cfg = readl((unsigned int)&reg->wincon0 +
140 			EXYNOS_WINCON(win_id));
141 
142 	cfg &= ~(EXYNOS_WINCON_BITSWP_ENABLE | EXYNOS_WINCON_BYTESWP_ENABLE |
143 		EXYNOS_WINCON_HAWSWP_ENABLE | EXYNOS_WINCON_WSWP_ENABLE |
144 		EXYNOS_WINCON_BURSTLEN_MASK | EXYNOS_WINCON_BPPMODE_MASK |
145 		EXYNOS_WINCON_INRGB_MASK | EXYNOS_WINCON_DATAPATH_MASK);
146 
147 	/* DATAPATH is DMA */
148 	cfg |= EXYNOS_WINCON_DATAPATH_DMA;
149 
150 	cfg |= EXYNOS_WINCON_HAWSWP_ENABLE;
151 
152 	/* dma burst is 16 */
153 	cfg |= EXYNOS_WINCON_BURSTLEN_16WORD;
154 
155 	switch (priv->vl_bpix) {
156 	case 4:
157 		cfg |= EXYNOS_WINCON_BPPMODE_16BPP_565;
158 		break;
159 	default:
160 		cfg |= EXYNOS_WINCON_BPPMODE_24BPP_888;
161 		break;
162 	}
163 
164 	writel(cfg, (unsigned int)&reg->wincon0 +
165 			EXYNOS_WINCON(win_id));
166 
167 	/* set window position to x=0, y=0*/
168 	cfg = EXYNOS_VIDOSD_LEFT_X(0) | EXYNOS_VIDOSD_TOP_Y(0);
169 	writel(cfg, (unsigned int)&reg->vidosd0a +
170 			EXYNOS_VIDOSD(win_id));
171 
172 	cfg = EXYNOS_VIDOSD_RIGHT_X(priv->vl_col - 1) |
173 		EXYNOS_VIDOSD_BOTTOM_Y(priv->vl_row - 1) |
174 		EXYNOS_VIDOSD_RIGHT_X_E(1) |
175 		EXYNOS_VIDOSD_BOTTOM_Y_E(0);
176 
177 	writel(cfg, (unsigned int)&reg->vidosd0b +
178 			EXYNOS_VIDOSD(win_id));
179 
180 	/* set window size for window0*/
181 	cfg = EXYNOS_VIDOSD_SIZE(priv->vl_col * priv->vl_row);
182 	writel(cfg, (unsigned int)&reg->vidosd0c +
183 			EXYNOS_VIDOSD(win_id));
184 }
185 
186 static void exynos_fimd_set_buffer_address(struct exynos_fb_priv *priv,
187 					   unsigned int win_id,
188 					   ulong lcd_base_addr)
189 {
190 	struct exynos_fb *reg = priv->reg;
191 	unsigned long start_addr, end_addr;
192 
193 	start_addr = lcd_base_addr;
194 	end_addr = start_addr + ((priv->vl_col * (VNBITS(priv->vl_bpix) / 8)) *
195 				priv->vl_row);
196 
197 	writel(start_addr, (unsigned int)&reg->vidw00add0b0 +
198 			EXYNOS_BUFFER_OFFSET(win_id));
199 	writel(end_addr, (unsigned int)&reg->vidw00add1b0 +
200 			EXYNOS_BUFFER_OFFSET(win_id));
201 }
202 
203 static void exynos_fimd_set_clock(struct exynos_fb_priv *priv)
204 {
205 	struct exynos_fb *reg = priv->reg;
206 	unsigned int cfg = 0, div = 0, remainder, remainder_div;
207 	unsigned long pixel_clock;
208 	unsigned long long src_clock;
209 
210 	if (priv->dual_lcd_enabled) {
211 		pixel_clock = priv->vl_freq *
212 				(priv->vl_hspw + priv->vl_hfpd +
213 				 priv->vl_hbpd + priv->vl_col / 2) *
214 				(priv->vl_vspw + priv->vl_vfpd +
215 				 priv->vl_vbpd + priv->vl_row);
216 	} else if (priv->interface_mode == FIMD_CPU_INTERFACE) {
217 		pixel_clock = priv->vl_freq *
218 				priv->vl_width * priv->vl_height *
219 				(priv->cs_setup + priv->wr_setup +
220 				 priv->wr_act + priv->wr_hold + 1);
221 	} else {
222 		pixel_clock = priv->vl_freq *
223 				(priv->vl_hspw + priv->vl_hfpd +
224 				 priv->vl_hbpd + priv->vl_col) *
225 				(priv->vl_vspw + priv->vl_vfpd +
226 				 priv->vl_vbpd + priv->vl_row);
227 	}
228 
229 	cfg = readl(&reg->vidcon0);
230 	cfg &= ~(EXYNOS_VIDCON0_CLKSEL_MASK | EXYNOS_VIDCON0_CLKVALUP_MASK |
231 		EXYNOS_VIDCON0_CLKVAL_F(0xFF) | EXYNOS_VIDCON0_VCLKEN_MASK |
232 		EXYNOS_VIDCON0_CLKDIR_MASK);
233 	cfg |= (EXYNOS_VIDCON0_CLKSEL_SCLK | EXYNOS_VIDCON0_CLKVALUP_ALWAYS |
234 		EXYNOS_VIDCON0_VCLKEN_NORMAL | EXYNOS_VIDCON0_CLKDIR_DIVIDED);
235 
236 	src_clock = (unsigned long long) get_lcd_clk();
237 
238 	/* get quotient and remainder. */
239 	remainder = do_div(src_clock, pixel_clock);
240 	div = src_clock;
241 
242 	remainder *= 10;
243 	remainder_div = remainder / pixel_clock;
244 
245 	/* round about one places of decimals. */
246 	if (remainder_div >= 5)
247 		div++;
248 
249 	/* in case of dual lcd mode. */
250 	if (priv->dual_lcd_enabled)
251 		div--;
252 
253 	cfg |= EXYNOS_VIDCON0_CLKVAL_F(div - 1);
254 	writel(cfg, &reg->vidcon0);
255 }
256 
257 void exynos_set_trigger(struct exynos_fb_priv *priv)
258 {
259 	struct exynos_fb *reg = priv->reg;
260 	unsigned int cfg = 0;
261 
262 	cfg = readl(&reg->trigcon);
263 
264 	cfg |= (EXYNOS_I80SOFT_TRIG_EN | EXYNOS_I80START_TRIG);
265 
266 	writel(cfg, &reg->trigcon);
267 }
268 
269 int exynos_is_i80_frame_done(struct exynos_fb_priv *priv)
270 {
271 	struct exynos_fb *reg = priv->reg;
272 	unsigned int cfg = 0;
273 	int status;
274 
275 	cfg = readl(&reg->trigcon);
276 
277 	/* frame done func is valid only when TRIMODE[0] is set to 1. */
278 	status = (cfg & EXYNOS_I80STATUS_TRIG_DONE) ==
279 			EXYNOS_I80STATUS_TRIG_DONE;
280 
281 	return status;
282 }
283 
284 static void exynos_fimd_lcd_on(struct exynos_fb_priv *priv)
285 {
286 	struct exynos_fb *reg = priv->reg;
287 	unsigned int cfg = 0;
288 
289 	/* display on */
290 	cfg = readl(&reg->vidcon0);
291 	cfg |= (EXYNOS_VIDCON0_ENVID_ENABLE | EXYNOS_VIDCON0_ENVID_F_ENABLE);
292 	writel(cfg, &reg->vidcon0);
293 }
294 
295 static void exynos_fimd_window_on(struct exynos_fb_priv *priv,
296 				  unsigned int win_id)
297 {
298 	struct exynos_fb *reg = priv->reg;
299 	unsigned int cfg = 0;
300 
301 	/* enable window */
302 	cfg = readl((unsigned int)&reg->wincon0 +
303 			EXYNOS_WINCON(win_id));
304 	cfg |= EXYNOS_WINCON_ENWIN_ENABLE;
305 	writel(cfg, (unsigned int)&reg->wincon0 +
306 			EXYNOS_WINCON(win_id));
307 
308 	cfg = readl(&reg->winshmap);
309 	cfg |= EXYNOS_WINSHMAP_CH_ENABLE(win_id);
310 	writel(cfg, &reg->winshmap);
311 }
312 
313 void exynos_fimd_lcd_off(struct exynos_fb_priv *priv)
314 {
315 	struct exynos_fb *reg = priv->reg;
316 	unsigned int cfg = 0;
317 
318 	cfg = readl(&reg->vidcon0);
319 	cfg &= (EXYNOS_VIDCON0_ENVID_DISABLE | EXYNOS_VIDCON0_ENVID_F_DISABLE);
320 	writel(cfg, &reg->vidcon0);
321 }
322 
323 void exynos_fimd_window_off(struct exynos_fb_priv *priv, unsigned int win_id)
324 {
325 	struct exynos_fb *reg = priv->reg;
326 	unsigned int cfg = 0;
327 
328 	cfg = readl((unsigned int)&reg->wincon0 +
329 			EXYNOS_WINCON(win_id));
330 	cfg &= EXYNOS_WINCON_ENWIN_DISABLE;
331 	writel(cfg, (unsigned int)&reg->wincon0 +
332 			EXYNOS_WINCON(win_id));
333 
334 	cfg = readl(&reg->winshmap);
335 	cfg &= ~EXYNOS_WINSHMAP_CH_DISABLE(win_id);
336 	writel(cfg, &reg->winshmap);
337 }
338 
339 /*
340 * The reset value for FIMD SYSMMU register MMU_CTRL is 3
341 * on Exynos5420 and newer versions.
342 * This means FIMD SYSMMU is on by default on Exynos5420
343 * and newer versions.
344 * Since in u-boot we don't use SYSMMU, we should disable
345 * those FIMD SYSMMU.
346 * Note that there are 2 SYSMMU for FIMD: m0 and m1.
347 * m0 handles windows 0 and 4, and m1 handles windows 1, 2 and 3.
348 * We disable both of them here.
349 */
350 void exynos_fimd_disable_sysmmu(void)
351 {
352 	u32 *sysmmufimd;
353 	unsigned int node;
354 	int node_list[2];
355 	int count;
356 	int i;
357 
358 	count = fdtdec_find_aliases_for_id(gd->fdt_blob, "fimd",
359 				COMPAT_SAMSUNG_EXYNOS_SYSMMU, node_list, 2);
360 	for (i = 0; i < count; i++) {
361 		node = node_list[i];
362 		if (node <= 0) {
363 			debug("Can't get device node for fimd sysmmu\n");
364 			return;
365 		}
366 
367 		sysmmufimd = (u32 *)fdtdec_get_addr(gd->fdt_blob, node, "reg");
368 		if (!sysmmufimd) {
369 			debug("Can't get base address for sysmmu fimdm0");
370 			return;
371 		}
372 
373 		writel(0x0, sysmmufimd);
374 	}
375 }
376 
377 void exynos_fimd_lcd_init(struct udevice *dev)
378 {
379 	struct exynos_fb_priv *priv = dev_get_priv(dev);
380 	struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);
381 	struct exynos_fb *reg = priv->reg;
382 	unsigned int cfg = 0, rgb_mode;
383 	unsigned int offset;
384 	unsigned int node;
385 
386 	node = dev_of_offset(dev);
387 	if (fdtdec_get_bool(gd->fdt_blob, node, "samsung,disable-sysmmu"))
388 		exynos_fimd_disable_sysmmu();
389 
390 	offset = exynos_fimd_get_base_offset();
391 
392 	rgb_mode = priv->rgb_mode;
393 
394 	if (priv->interface_mode == FIMD_RGB_INTERFACE) {
395 		cfg |= EXYNOS_VIDCON0_VIDOUT_RGB;
396 		writel(cfg, &reg->vidcon0);
397 
398 		cfg = readl(&reg->vidcon2);
399 		cfg &= ~(EXYNOS_VIDCON2_WB_MASK |
400 			EXYNOS_VIDCON2_TVFORMATSEL_MASK |
401 			EXYNOS_VIDCON2_TVFORMATSEL_YUV_MASK);
402 		cfg |= EXYNOS_VIDCON2_WB_DISABLE;
403 		writel(cfg, &reg->vidcon2);
404 
405 		/* set polarity */
406 		cfg = 0;
407 		if (!priv->vl_clkp)
408 			cfg |= EXYNOS_VIDCON1_IVCLK_RISING_EDGE;
409 		if (!priv->vl_hsp)
410 			cfg |= EXYNOS_VIDCON1_IHSYNC_INVERT;
411 		if (!priv->vl_vsp)
412 			cfg |= EXYNOS_VIDCON1_IVSYNC_INVERT;
413 		if (!priv->vl_dp)
414 			cfg |= EXYNOS_VIDCON1_IVDEN_INVERT;
415 
416 		writel(cfg, (unsigned int)&reg->vidcon1 + offset);
417 
418 		/* set timing */
419 		cfg = EXYNOS_VIDTCON0_VFPD(priv->vl_vfpd - 1);
420 		cfg |= EXYNOS_VIDTCON0_VBPD(priv->vl_vbpd - 1);
421 		cfg |= EXYNOS_VIDTCON0_VSPW(priv->vl_vspw - 1);
422 		writel(cfg, (unsigned int)&reg->vidtcon0 + offset);
423 
424 		cfg = EXYNOS_VIDTCON1_HFPD(priv->vl_hfpd - 1);
425 		cfg |= EXYNOS_VIDTCON1_HBPD(priv->vl_hbpd - 1);
426 		cfg |= EXYNOS_VIDTCON1_HSPW(priv->vl_hspw - 1);
427 
428 		writel(cfg, (unsigned int)&reg->vidtcon1 + offset);
429 
430 		/* set lcd size */
431 		cfg = EXYNOS_VIDTCON2_HOZVAL(priv->vl_col - 1) |
432 			EXYNOS_VIDTCON2_LINEVAL(priv->vl_row - 1) |
433 			EXYNOS_VIDTCON2_HOZVAL_E(priv->vl_col - 1) |
434 			EXYNOS_VIDTCON2_LINEVAL_E(priv->vl_row - 1);
435 
436 		writel(cfg, (unsigned int)&reg->vidtcon2 + offset);
437 	}
438 
439 	/* set display mode */
440 	cfg = readl(&reg->vidcon0);
441 	cfg &= ~EXYNOS_VIDCON0_PNRMODE_MASK;
442 	cfg |= (rgb_mode << EXYNOS_VIDCON0_PNRMODE_SHIFT);
443 	writel(cfg, &reg->vidcon0);
444 
445 	/* set par */
446 	exynos_fimd_set_par(priv, priv->win_id);
447 
448 	/* set memory address */
449 	exynos_fimd_set_buffer_address(priv, priv->win_id, plat->base);
450 
451 	/* set buffer size */
452 	cfg = EXYNOS_VIDADDR_PAGEWIDTH(priv->vl_col *
453 			VNBITS(priv->vl_bpix) / 8) |
454 		EXYNOS_VIDADDR_PAGEWIDTH_E(priv->vl_col *
455 			VNBITS(priv->vl_bpix) / 8) |
456 		EXYNOS_VIDADDR_OFFSIZE(0) |
457 		EXYNOS_VIDADDR_OFFSIZE_E(0);
458 
459 	writel(cfg, (unsigned int)&reg->vidw00add2 +
460 					EXYNOS_BUFFER_SIZE(priv->win_id));
461 
462 	/* set clock */
463 	exynos_fimd_set_clock(priv);
464 
465 	/* set rgb mode to dual lcd. */
466 	exynos_fimd_set_dualrgb(priv, priv->dual_lcd_enabled);
467 
468 	/* display on */
469 	exynos_fimd_lcd_on(priv);
470 
471 	/* window on */
472 	exynos_fimd_window_on(priv, priv->win_id);
473 
474 	exynos_fimd_set_dp_clkcon(priv, priv->dp_enabled);
475 }
476 
477 unsigned long exynos_fimd_calc_fbsize(struct exynos_fb_priv *priv)
478 {
479 	return priv->vl_col * priv->vl_row * (VNBITS(priv->vl_bpix) / 8);
480 }
481 
482 int exynos_fb_ofdata_to_platdata(struct udevice *dev)
483 {
484 	struct exynos_fb_priv *priv = dev_get_priv(dev);
485 	unsigned int node = dev_of_offset(dev);
486 	const void *blob = gd->fdt_blob;
487 	fdt_addr_t addr;
488 
489 	addr = dev_get_addr(dev);
490 	if (addr == FDT_ADDR_T_NONE) {
491 		debug("Can't get the FIMD base address\n");
492 		return -EINVAL;
493 	}
494 	priv->reg = (struct exynos_fb *)addr;
495 
496 	priv->vl_col = fdtdec_get_int(blob, node, "samsung,vl-col", 0);
497 	if (priv->vl_col == 0) {
498 		debug("Can't get XRES\n");
499 		return -ENXIO;
500 	}
501 
502 	priv->vl_row = fdtdec_get_int(blob, node, "samsung,vl-row", 0);
503 	if (priv->vl_row == 0) {
504 		debug("Can't get YRES\n");
505 		return -ENXIO;
506 	}
507 
508 	priv->vl_width = fdtdec_get_int(blob, node,
509 						"samsung,vl-width", 0);
510 
511 	priv->vl_height = fdtdec_get_int(blob, node,
512 						"samsung,vl-height", 0);
513 
514 	priv->vl_freq = fdtdec_get_int(blob, node, "samsung,vl-freq", 0);
515 	if (priv->vl_freq == 0) {
516 		debug("Can't get refresh rate\n");
517 		return -ENXIO;
518 	}
519 
520 	if (fdtdec_get_bool(blob, node, "samsung,vl-clkp"))
521 		priv->vl_clkp = VIDEO_ACTIVE_LOW;
522 
523 	if (fdtdec_get_bool(blob, node, "samsung,vl-oep"))
524 		priv->vl_oep = VIDEO_ACTIVE_LOW;
525 
526 	if (fdtdec_get_bool(blob, node, "samsung,vl-hsp"))
527 		priv->vl_hsp = VIDEO_ACTIVE_LOW;
528 
529 	if (fdtdec_get_bool(blob, node, "samsung,vl-vsp"))
530 		priv->vl_vsp = VIDEO_ACTIVE_LOW;
531 
532 	if (fdtdec_get_bool(blob, node, "samsung,vl-dp"))
533 		priv->vl_dp = VIDEO_ACTIVE_LOW;
534 
535 	priv->vl_bpix = fdtdec_get_int(blob, node, "samsung,vl-bpix", 0);
536 	if (priv->vl_bpix == 0) {
537 		debug("Can't get bits per pixel\n");
538 		return -ENXIO;
539 	}
540 
541 	priv->vl_hspw = fdtdec_get_int(blob, node, "samsung,vl-hspw", 0);
542 	if (priv->vl_hspw == 0) {
543 		debug("Can't get hsync width\n");
544 		return -ENXIO;
545 	}
546 
547 	priv->vl_hfpd = fdtdec_get_int(blob, node, "samsung,vl-hfpd", 0);
548 	if (priv->vl_hfpd == 0) {
549 		debug("Can't get right margin\n");
550 		return -ENXIO;
551 	}
552 
553 	priv->vl_hbpd = (u_char)fdtdec_get_int(blob, node,
554 							"samsung,vl-hbpd", 0);
555 	if (priv->vl_hbpd == 0) {
556 		debug("Can't get left margin\n");
557 		return -ENXIO;
558 	}
559 
560 	priv->vl_vspw = (u_char)fdtdec_get_int(blob, node,
561 							"samsung,vl-vspw", 0);
562 	if (priv->vl_vspw == 0) {
563 		debug("Can't get vsync width\n");
564 		return -ENXIO;
565 	}
566 
567 	priv->vl_vfpd = fdtdec_get_int(blob, node,
568 							"samsung,vl-vfpd", 0);
569 	if (priv->vl_vfpd == 0) {
570 		debug("Can't get lower margin\n");
571 		return -ENXIO;
572 	}
573 
574 	priv->vl_vbpd = fdtdec_get_int(blob, node, "samsung,vl-vbpd", 0);
575 	if (priv->vl_vbpd == 0) {
576 		debug("Can't get upper margin\n");
577 		return -ENXIO;
578 	}
579 
580 	priv->vl_cmd_allow_len = fdtdec_get_int(blob, node,
581 						"samsung,vl-cmd-allow-len", 0);
582 
583 	priv->win_id = fdtdec_get_int(blob, node, "samsung,winid", 0);
584 	priv->init_delay = fdtdec_get_int(blob, node,
585 						"samsung,init-delay", 0);
586 	priv->power_on_delay = fdtdec_get_int(blob, node,
587 						"samsung,power-on-delay", 0);
588 	priv->reset_delay = fdtdec_get_int(blob, node,
589 						"samsung,reset-delay", 0);
590 	priv->interface_mode = fdtdec_get_int(blob, node,
591 						"samsung,interface-mode", 0);
592 	priv->mipi_enabled = fdtdec_get_int(blob, node,
593 						"samsung,mipi-enabled", 0);
594 	priv->dp_enabled = fdtdec_get_int(blob, node,
595 						"samsung,dp-enabled", 0);
596 	priv->cs_setup = fdtdec_get_int(blob, node,
597 						"samsung,cs-setup", 0);
598 	priv->wr_setup = fdtdec_get_int(blob, node,
599 						"samsung,wr-setup", 0);
600 	priv->wr_act = fdtdec_get_int(blob, node, "samsung,wr-act", 0);
601 	priv->wr_hold = fdtdec_get_int(blob, node, "samsung,wr-hold", 0);
602 
603 	priv->logo_on = fdtdec_get_int(blob, node, "samsung,logo-on", 0);
604 	if (priv->logo_on) {
605 		priv->logo_width = fdtdec_get_int(blob, node,
606 						"samsung,logo-width", 0);
607 		priv->logo_height = fdtdec_get_int(blob, node,
608 						"samsung,logo-height", 0);
609 		priv->logo_addr = fdtdec_get_int(blob, node,
610 						"samsung,logo-addr", 0);
611 	}
612 
613 	priv->rgb_mode = fdtdec_get_int(blob, node,
614 						"samsung,rgb-mode", 0);
615 	priv->pclk_name = fdtdec_get_int(blob, node,
616 						"samsung,pclk-name", 0);
617 	priv->sclk_div = fdtdec_get_int(blob, node,
618 						"samsung,sclk-div", 0);
619 	priv->dual_lcd_enabled = fdtdec_get_int(blob, node,
620 						"samsung,dual-lcd-enabled", 0);
621 
622 	return 0;
623 }
624 
625 static int exynos_fb_probe(struct udevice *dev)
626 {
627 	struct video_priv *uc_priv = dev_get_uclass_priv(dev);
628 	struct exynos_fb_priv *priv = dev_get_priv(dev);
629 	struct udevice *panel, *bridge;
630 	struct udevice *dp;
631 	int ret;
632 
633 	debug("%s: start\n", __func__);
634 	set_system_display_ctrl();
635 	set_lcd_clk();
636 
637 #ifdef CONFIG_EXYNOS_MIPI_DSIM
638 	exynos_init_dsim_platform_data(&panel_info);
639 #endif
640 	exynos_fimd_lcd_init(dev);
641 
642 	ret = uclass_first_device(UCLASS_PANEL, &panel);
643 	if (ret) {
644 		printf("LCD panel failed to probe\n");
645 		return ret;
646 	}
647 	if (!panel) {
648 		printf("LCD panel not found\n");
649 		return -ENODEV;
650 	}
651 
652 	ret = uclass_first_device(UCLASS_DISPLAY, &dp);
653 	if (ret) {
654 		debug("%s: Display device error %d\n", __func__, ret);
655 		return ret;
656 	}
657 	if (!dev) {
658 		debug("%s: Display device missing\n", __func__);
659 		return -ENODEV;
660 	}
661 	ret = display_enable(dp, 18, NULL);
662 	if (ret) {
663 		debug("%s: Display enable error %d\n", __func__, ret);
664 		return ret;
665 	}
666 
667 	/* backlight / pwm */
668 	ret = panel_enable_backlight(panel);
669 	if (ret) {
670 		debug("%s: backlight error: %d\n", __func__, ret);
671 		return ret;
672 	}
673 
674 	ret = uclass_get_device(UCLASS_VIDEO_BRIDGE, 0, &bridge);
675 	if (!ret)
676 		ret = video_bridge_set_backlight(bridge, 80);
677 	if (ret) {
678 		debug("%s: No video bridge, or no backlight on bridge\n",
679 		      __func__);
680 		exynos_pinmux_config(PERIPH_ID_PWM0, 0);
681 	}
682 
683 	uc_priv->xsize = priv->vl_col;
684 	uc_priv->ysize = priv->vl_row;
685 	uc_priv->bpix = priv->vl_bpix;
686 
687 	/* Enable flushing after LCD writes if requested */
688 	video_set_flush_dcache(dev, true);
689 
690 	return 0;
691 }
692 
693 static int exynos_fb_bind(struct udevice *dev)
694 {
695 	struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);
696 
697 	/* This is the maximum panel size we expect to see */
698 	plat->size = 1920 * 1080 * 2;
699 
700 	return 0;
701 }
702 
703 static const struct video_ops exynos_fb_ops = {
704 };
705 
706 static const struct udevice_id exynos_fb_ids[] = {
707 	{ .compatible = "samsung,exynos-fimd" },
708 	{ }
709 };
710 
711 U_BOOT_DRIVER(exynos_fb) = {
712 	.name	= "exynos_fb",
713 	.id	= UCLASS_VIDEO,
714 	.of_match = exynos_fb_ids,
715 	.ops	= &exynos_fb_ops,
716 	.bind	= exynos_fb_bind,
717 	.probe	= exynos_fb_probe,
718 	.ofdata_to_platdata	= exynos_fb_ofdata_to_platdata,
719 	.priv_auto_alloc_size	= sizeof(struct exynos_fb_priv),
720 };
721