xref: /openbmc/u-boot/drivers/video/pxa_lcd.c (revision b46694df)
1 /*
2  * PXA LCD Controller
3  *
4  * (C) Copyright 2001-2002
5  * Wolfgang Denk, DENX Software Engineering -- wd@denx.de
6  *
7  * See file CREDITS for list of people who contributed to this
8  * project.
9  *
10  * This program is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU General Public License as
12  * published by the Free Software Foundation; either version 2 of
13  * the License, or (at your option) any later version.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
18  * GNU General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program; if not, write to the Free Software
22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
23  * MA 02111-1307 USA
24  */
25 
26 /************************************************************************/
27 /* ** HEADER FILES							*/
28 /************************************************************************/
29 
30 #include <config.h>
31 #include <common.h>
32 #include <version.h>
33 #include <stdarg.h>
34 #include <linux/types.h>
35 #include <stdio_dev.h>
36 #include <lcd.h>
37 #include <asm/arch/pxa-regs.h>
38 #include <asm/io.h>
39 
40 /* #define DEBUG */
41 
42 #ifdef CONFIG_LCD
43 
44 /*----------------------------------------------------------------------*/
45 /*
46  * Define panel bpp, LCCR0, LCCR3 and panel_info video struct for
47  * your display.
48  */
49 
50 #ifdef CONFIG_PXA_VGA
51 /* LCD outputs connected to a video DAC  */
52 # define LCD_BPP	LCD_COLOR8
53 
54 /* you have to set lccr0 and lccr3 (including pcd) */
55 # define REG_LCCR0	0x003008f8
56 # define REG_LCCR3	0x0300FF01
57 
58 /* 640x480x16 @ 61 Hz */
59 vidinfo_t panel_info = {
60 	.vl_col		= 640,
61 	.vl_row		= 480,
62 	.vl_width	= 640,
63 	.vl_height	= 480,
64 	.vl_clkp	= CONFIG_SYS_HIGH,
65 	.vl_oep		= CONFIG_SYS_HIGH,
66 	.vl_hsp		= CONFIG_SYS_HIGH,
67 	.vl_vsp		= CONFIG_SYS_HIGH,
68 	.vl_dp		= CONFIG_SYS_HIGH,
69 	.vl_bpix	= LCD_BPP,
70 	.vl_lbw		= 0,
71 	.vl_splt	= 0,
72 	.vl_clor	= 0,
73 	.vl_tft		= 1,
74 	.vl_hpw		= 40,
75 	.vl_blw		= 56,
76 	.vl_elw		= 56,
77 	.vl_vpw		= 20,
78 	.vl_bfw		= 8,
79 	.vl_efw		= 8,
80 };
81 #endif /* CONFIG_PXA_VIDEO */
82 
83 /*----------------------------------------------------------------------*/
84 #ifdef CONFIG_SHARP_LM8V31
85 
86 # define LCD_BPP	LCD_COLOR8
87 # define LCD_INVERT_COLORS	/* Needed for colors to be correct, but why?	*/
88 
89 /* you have to set lccr0 and lccr3 (including pcd) */
90 # define REG_LCCR0	0x0030087C
91 # define REG_LCCR3	0x0340FF08
92 
93 vidinfo_t panel_info = {
94 	.vl_col		= 640,
95 	.vl_row		= 480,
96 	.vl_width	= 157,
97 	.vl_height	= 118,
98 	.vl_clkp	= CONFIG_SYS_HIGH,
99 	.vl_oep		= CONFIG_SYS_HIGH,
100 	.vl_hsp		= CONFIG_SYS_HIGH,
101 	.vl_vsp		= CONFIG_SYS_HIGH,
102 	.vl_dp		= CONFIG_SYS_HIGH,
103 	.vl_bpix	= LCD_BPP,
104 	.vl_lbw		= 0,
105 	.vl_splt	= 1,
106 	.vl_clor	= 1,
107 	.vl_tft		= 0,
108 	.vl_hpw		= 1,
109 	.vl_blw		= 3,
110 	.vl_elw		= 3,
111 	.vl_vpw		= 1,
112 	.vl_bfw		= 0,
113 	.vl_efw		= 0,
114 };
115 #endif /* CONFIG_SHARP_LM8V31 */
116 /*----------------------------------------------------------------------*/
117 #ifdef CONFIG_VOIPAC_LCD
118 
119 # define LCD_BPP	LCD_COLOR8
120 # define LCD_INVERT_COLORS
121 
122 /* you have to set lccr0 and lccr3 (including pcd) */
123 # define REG_LCCR0	0x043008f8
124 # define REG_LCCR3	0x0340FF08
125 
126 vidinfo_t panel_info = {
127 	.vl_col		= 640,
128 	.vl_row		= 480,
129 	.vl_width	= 157,
130 	.vl_height	= 118,
131 	.vl_clkp	= CONFIG_SYS_HIGH,
132 	.vl_oep		= CONFIG_SYS_HIGH,
133 	.vl_hsp		= CONFIG_SYS_HIGH,
134 	.vl_vsp		= CONFIG_SYS_HIGH,
135 	.vl_dp		= CONFIG_SYS_HIGH,
136 	.vl_bpix	= LCD_BPP,
137 	.vl_lbw		= 0,
138 	.vl_splt	= 1,
139 	.vl_clor	= 1,
140 	.vl_tft		= 1,
141 	.vl_hpw		= 32,
142 	.vl_blw		= 144,
143 	.vl_elw		= 32,
144 	.vl_vpw		= 2,
145 	.vl_bfw		= 13,
146 	.vl_efw		= 30,
147 };
148 #endif /* CONFIG_VOIPAC_LCD */
149 
150 /*----------------------------------------------------------------------*/
151 #ifdef CONFIG_HITACHI_SX14
152 /* Hitachi SX14Q004-ZZA color STN LCD */
153 #define LCD_BPP		LCD_COLOR8
154 
155 /* you have to set lccr0 and lccr3 (including pcd) */
156 #define REG_LCCR0	0x00301079
157 #define REG_LCCR3	0x0340FF20
158 
159 vidinfo_t panel_info = {
160 	.vl_col		= 320,
161 	.vl_row		= 240,
162 	.vl_width	= 167,
163 	.vl_height	= 109,
164 	.vl_clkp	= CONFIG_SYS_HIGH,
165 	.vl_oep		= CONFIG_SYS_HIGH,
166 	.vl_hsp		= CONFIG_SYS_HIGH,
167 	.vl_vsp		= CONFIG_SYS_HIGH,
168 	.vl_dp		= CONFIG_SYS_HIGH,
169 	.vl_bpix	= LCD_BPP,
170 	.vl_lbw		= 1,
171 	.vl_splt	= 0,
172 	.vl_clor	= 1,
173 	.vl_tft		= 0,
174 	.vl_hpw		= 1,
175 	.vl_blw		= 1,
176 	.vl_elw		= 1,
177 	.vl_vpw		= 7,
178 	.vl_bfw		= 0,
179 	.vl_efw		= 0,
180 };
181 #endif /* CONFIG_HITACHI_SX14 */
182 
183 /*----------------------------------------------------------------------*/
184 #ifdef CONFIG_LMS283GF05
185 
186 # define LCD_BPP	LCD_COLOR8
187 /*# define LCD_INVERT_COLORS*/
188 
189 /* you have to set lccr0 and lccr3 (including pcd) */
190 # define REG_LCCR0	0x043008f8
191 # define REG_LCCR3	0x03b00009
192 
193 vidinfo_t panel_info = {
194 	.vl_col		= 240,
195 	.vl_row		= 320,
196 	.vl_width	= 240,
197 	.vl_height	= 320,
198 	.vl_clkp	= CONFIG_SYS_HIGH,
199 	.vl_oep		= CONFIG_SYS_LOW,
200 	.vl_hsp		= CONFIG_SYS_LOW,
201 	.vl_vsp		= CONFIG_SYS_LOW,
202 	.vl_dp		= CONFIG_SYS_HIGH,
203 	.vl_bpix	= LCD_BPP,
204 	.vl_lbw		= 0,
205 	.vl_splt	= 1,
206 	.vl_clor	= 1,
207 	.vl_tft		= 1,
208 	.vl_hpw		= 4,
209 	.vl_blw		= 4,
210 	.vl_elw		= 8,
211 	.vl_vpw		= 4,
212 	.vl_bfw		= 4,
213 	.vl_efw		= 8,
214 };
215 #endif /* CONFIG_LMS283GF05 */
216 
217 /*----------------------------------------------------------------------*/
218 
219 #ifdef CONFIG_ACX517AKN
220 
221 # define LCD_BPP	LCD_COLOR8
222 
223 /* you have to set lccr0 and lccr3 (including pcd) */
224 # define REG_LCCR0	0x003008f9
225 # define REG_LCCR3	0x03700006
226 
227 vidinfo_t panel_info = {
228 	.vl_col		= 320,
229 	.vl_row		= 320,
230 	.vl_width	= 320,
231 	.vl_height	= 320,
232 	.vl_clkp	= CONFIG_SYS_HIGH,
233 	.vl_oep		= CONFIG_SYS_LOW,
234 	.vl_hsp		= CONFIG_SYS_LOW,
235 	.vl_vsp		= CONFIG_SYS_LOW,
236 	.vl_dp		= CONFIG_SYS_HIGH,
237 	.vl_bpix	= LCD_BPP,
238 	.vl_lbw		= 0,
239 	.vl_splt	= 1,
240 	.vl_clor	= 1,
241 	.vl_tft		= 1,
242 	.vl_hpw		= 0x04,
243 	.vl_blw		= 0x1c,
244 	.vl_elw		= 0x08,
245 	.vl_vpw		= 0x01,
246 	.vl_bfw		= 0x07,
247 	.vl_efw		= 0x08,
248 };
249 #endif /* CONFIG_ACX517AKN */
250 
251 #ifdef CONFIG_ACX544AKN
252 
253 # define LCD_BPP	LCD_COLOR16
254 
255 /* you have to set lccr0 and lccr3 (including pcd) */
256 # define REG_LCCR0	0x003008f9
257 # define REG_LCCR3	0x04700007 /* 16bpp */
258 
259 vidinfo_t panel_info = {
260 	.vl_col		= 320,
261 	.vl_row		= 320,
262 	.vl_width	= 320,
263 	.vl_height	= 320,
264 	.vl_clkp	= CONFIG_SYS_LOW,
265 	.vl_oep		= CONFIG_SYS_LOW,
266 	.vl_hsp		= CONFIG_SYS_LOW,
267 	.vl_vsp		= CONFIG_SYS_LOW,
268 	.vl_dp		= CONFIG_SYS_LOW,
269 	.vl_bpix	= LCD_BPP,
270 	.vl_lbw		= 0,
271 	.vl_splt	= 0,
272 	.vl_clor	= 1,
273 	.vl_tft		= 1,
274 	.vl_hpw		= 0x05,
275 	.vl_blw		= 0x13,
276 	.vl_elw		= 0x08,
277 	.vl_vpw		= 0x02,
278 	.vl_bfw		= 0x07,
279 	.vl_efw		= 0x05,
280 };
281 #endif /* CONFIG_ACX544AKN */
282 
283 /*----------------------------------------------------------------------*/
284 
285 #ifdef CONFIG_LQ038J7DH53
286 
287 # define LCD_BPP	LCD_COLOR8
288 
289 /* you have to set lccr0 and lccr3 (including pcd) */
290 # define REG_LCCR0	0x003008f9
291 # define REG_LCCR3	0x03700004
292 
293 vidinfo_t panel_info = {
294 	.vl_col		= 320,
295 	.vl_row		= 480,
296 	.vl_width	= 320,
297 	.vl_height	= 480,
298 	.vl_clkp	= CONFIG_SYS_HIGH,
299 	.vl_oep		= CONFIG_SYS_LOW,
300 	.vl_hsp		= CONFIG_SYS_LOW,
301 	.vl_vsp		= CONFIG_SYS_LOW,
302 	.vl_dp		= CONFIG_SYS_HIGH,
303 	.vl_bpix	= LCD_BPP,
304 	.vl_lbw		= 0,
305 	.vl_splt	= 1,
306 	.vl_clor	= 1,
307 	.vl_tft		= 1,
308 	.vl_hpw		= 0x04,
309 	.vl_blw		= 0x20,
310 	.vl_elw		= 0x01,
311 	.vl_vpw		= 0x01,
312 	.vl_bfw		= 0x04,
313 	.vl_efw		= 0x01,
314 };
315 #endif /* CONFIG_ACX517AKN */
316 
317 /*----------------------------------------------------------------------*/
318 
319 #ifdef CONFIG_LITTLETON_LCD
320 # define LCD_BPP	LCD_COLOR8
321 
322 /* you have to set lccr0 and lccr3 (including pcd) */
323 # define REG_LCCR0	0x003008f8
324 # define REG_LCCR3	0x0300FF04
325 
326 vidinfo_t panel_info = {
327 	.vl_col		= 480,
328 	.vl_row		= 640,
329 	.vl_width	= 480,
330 	.vl_height	= 640,
331 	.vl_clkp	= CONFIG_SYS_HIGH,
332 	.vl_oep		= CONFIG_SYS_HIGH,
333 	.vl_hsp		= CONFIG_SYS_HIGH,
334 	.vl_vsp		= CONFIG_SYS_HIGH,
335 	.vl_dp		= CONFIG_SYS_HIGH,
336 	.vl_bpix	= LCD_BPP,
337 	.vl_lbw		= 0,
338 	.vl_splt	= 0,
339 	.vl_clor	= 0,
340 	.vl_tft		= 1,
341 	.vl_hpw		= 9,
342 	.vl_blw		= 8,
343 	.vl_elw		= 24,
344 	.vl_vpw		= 2,
345 	.vl_bfw		= 2,
346 	.vl_efw		= 4,
347 };
348 #endif /* CONFIG_LITTLETON_LCD */
349 
350 /*----------------------------------------------------------------------*/
351 
352 static int pxafb_init_mem (void *lcdbase, vidinfo_t *vid);
353 static void pxafb_setup_gpio (vidinfo_t *vid);
354 static void pxafb_enable_controller (vidinfo_t *vid);
355 static int pxafb_init (vidinfo_t *vid);
356 
357 /************************************************************************/
358 /* ---------------  PXA chipset specific functions  ------------------- */
359 /************************************************************************/
360 
361 void lcd_ctrl_init (void *lcdbase)
362 {
363 	pxafb_init_mem(lcdbase, &panel_info);
364 	pxafb_init(&panel_info);
365 	pxafb_setup_gpio(&panel_info);
366 	pxafb_enable_controller(&panel_info);
367 }
368 
369 /*----------------------------------------------------------------------*/
370 #if LCD_BPP == LCD_COLOR8
371 void
372 lcd_setcolreg (ushort regno, ushort red, ushort green, ushort blue)
373 {
374 	struct pxafb_info *fbi = &panel_info.pxa;
375 	unsigned short *palette = (unsigned short *)fbi->palette;
376 	u_int val;
377 
378 	if (regno < fbi->palette_size) {
379 		val = ((red << 8) & 0xf800);
380 		val |= ((green << 4) & 0x07e0);
381 		val |= (blue & 0x001f);
382 
383 #ifdef LCD_INVERT_COLORS
384 		palette[regno] = ~val;
385 #else
386 		palette[regno] = val;
387 #endif
388 	}
389 
390 	debug ("setcolreg: reg %2d @ %p: R=%02X G=%02X B=%02X => %04X\n",
391 		regno, &palette[regno],
392 		red, green, blue,
393 		palette[regno]);
394 }
395 #endif /* LCD_COLOR8 */
396 
397 /*----------------------------------------------------------------------*/
398 #if LCD_BPP == LCD_MONOCHROME
399 void lcd_initcolregs (void)
400 {
401 	struct pxafb_info *fbi = &panel_info.pxa;
402 	cmap = (ushort *)fbi->palette;
403 	ushort regno;
404 
405 	for (regno = 0; regno < 16; regno++) {
406 		cmap[regno * 2] = 0;
407 		cmap[(regno * 2) + 1] = regno & 0x0f;
408 	}
409 }
410 #endif /* LCD_MONOCHROME */
411 
412 /*----------------------------------------------------------------------*/
413 __weak void lcd_enable(void)
414 {
415 }
416 
417 /************************************************************************/
418 /* ** PXA255 specific routines						*/
419 /************************************************************************/
420 
421 /*
422  * Calculate fb size for VIDEOLFB_ATAG. Size returned contains fb,
423  * descriptors and palette areas.
424  */
425 ulong calc_fbsize (void)
426 {
427 	ulong size;
428 	int line_length = (panel_info.vl_col * NBITS (panel_info.vl_bpix)) / 8;
429 
430 	size = line_length * panel_info.vl_row;
431 	size += PAGE_SIZE;
432 
433 	return size;
434 }
435 
436 static int pxafb_init_mem (void *lcdbase, vidinfo_t *vid)
437 {
438 	u_long palette_mem_size;
439 	struct pxafb_info *fbi = &vid->pxa;
440 	int fb_size = vid->vl_row * (vid->vl_col * NBITS (vid->vl_bpix)) / 8;
441 
442 	fbi->screen = (u_long)lcdbase;
443 
444 	fbi->palette_size = NBITS(vid->vl_bpix) == 8 ? 256 : 16;
445 	palette_mem_size = fbi->palette_size * sizeof(u16);
446 
447 	debug("palette_mem_size = 0x%08lx\n", (u_long) palette_mem_size);
448 	/* locate palette and descs at end of page following fb */
449 	fbi->palette = (u_long)lcdbase + fb_size + PAGE_SIZE - palette_mem_size;
450 
451 	return 0;
452 }
453 #ifdef	CONFIG_CPU_MONAHANS
454 static inline void pxafb_setup_gpio (vidinfo_t *vid) {}
455 #else
456 static void pxafb_setup_gpio (vidinfo_t *vid)
457 {
458 	u_long lccr0;
459 
460 	/*
461 	 * setup is based on type of panel supported
462 	 */
463 
464 	lccr0 = vid->pxa.reg_lccr0;
465 
466 	/* 4 bit interface */
467 	if ((lccr0 & LCCR0_CMS) && (lccr0 & LCCR0_SDS) && !(lccr0 & LCCR0_DPD))
468 	{
469 		debug("Setting GPIO for 4 bit data\n");
470 		/* bits 58-61 */
471 		writel(readl(GPDR1) | (0xf << 26), GPDR1);
472 		writel((readl(GAFR1_U) & ~(0xff << 20)) | (0xaa << 20),
473 			GAFR1_U);
474 
475 		/* bits 74-77 */
476 		writel(readl(GPDR2) | (0xf << 10), GPDR2);
477 		writel((readl(GAFR2_L) & ~(0xff << 20)) | (0xaa << 20),
478 			GAFR2_L);
479 	}
480 
481 	/* 8 bit interface */
482 	else if (((lccr0 & LCCR0_CMS) && ((lccr0 & LCCR0_SDS) || (lccr0 & LCCR0_DPD))) ||
483 		(!(lccr0 & LCCR0_CMS) && !(lccr0 & LCCR0_PAS) && !(lccr0 & LCCR0_SDS)))
484 	{
485 		debug("Setting GPIO for 8 bit data\n");
486 		/* bits 58-65 */
487 		writel(readl(GPDR1) | (0x3f << 26), GPDR1);
488 		writel(readl(GPDR2) | (0x3), GPDR2);
489 
490 		writel((readl(GAFR1_U) & ~(0xfff << 20)) | (0xaaa << 20),
491 			GAFR1_U);
492 		writel((readl(GAFR2_L) & ~0xf) | (0xa), GAFR2_L);
493 
494 		/* bits 74-77 */
495 		writel(readl(GPDR2) | (0xf << 10), GPDR2);
496 		writel((readl(GAFR2_L) & ~(0xff << 20)) | (0xaa << 20),
497 			GAFR2_L);
498 	}
499 
500 	/* 16 bit interface */
501 	else if (!(lccr0 & LCCR0_CMS) && ((lccr0 & LCCR0_SDS) || (lccr0 & LCCR0_PAS)))
502 	{
503 		debug("Setting GPIO for 16 bit data\n");
504 		/* bits 58-77 */
505 		writel(readl(GPDR1) | (0x3f << 26), GPDR1);
506 		writel(readl(GPDR2) | 0x00003fff, GPDR2);
507 
508 		writel((readl(GAFR1_U) & ~(0xfff << 20)) | (0xaaa << 20),
509 			GAFR1_U);
510 		writel((readl(GAFR2_L) & 0xf0000000) | 0x0aaaaaaa, GAFR2_L);
511 	}
512 	else
513 	{
514 		printf("pxafb_setup_gpio: unable to determine bits per pixel\n");
515 	}
516 }
517 #endif
518 
519 static void pxafb_enable_controller (vidinfo_t *vid)
520 {
521 	debug("Enabling LCD controller\n");
522 
523 	/* Sequence from 11.7.10 */
524 	writel(vid->pxa.reg_lccr3, LCCR3);
525 	writel(vid->pxa.reg_lccr2, LCCR2);
526 	writel(vid->pxa.reg_lccr1, LCCR1);
527 	writel(vid->pxa.reg_lccr0 & ~LCCR0_ENB, LCCR0);
528 	writel(vid->pxa.fdadr0, FDADR0);
529 	writel(vid->pxa.fdadr1, FDADR1);
530 	writel(readl(LCCR0) | LCCR0_ENB, LCCR0);
531 
532 #ifdef	CONFIG_CPU_MONAHANS
533 	writel(readl(CKENA) | CKENA_1_LCD, CKENA);
534 #else
535 	writel(readl(CKEN) | CKEN16_LCD, CKEN);
536 #endif
537 
538 	debug("FDADR0 = 0x%08x\n", readl(FDADR0));
539 	debug("FDADR1 = 0x%08x\n", readl(FDADR1));
540 	debug("LCCR0 = 0x%08x\n", readl(LCCR0));
541 	debug("LCCR1 = 0x%08x\n", readl(LCCR1));
542 	debug("LCCR2 = 0x%08x\n", readl(LCCR2));
543 	debug("LCCR3 = 0x%08x\n", readl(LCCR3));
544 }
545 
546 static int pxafb_init (vidinfo_t *vid)
547 {
548 	struct pxafb_info *fbi = &vid->pxa;
549 
550 	debug("Configuring PXA LCD\n");
551 
552 	fbi->reg_lccr0 = REG_LCCR0;
553 	fbi->reg_lccr3 = REG_LCCR3;
554 
555 	debug("vid: vl_col=%d hslen=%d lm=%d rm=%d\n",
556 		vid->vl_col, vid->vl_hpw,
557 		vid->vl_blw, vid->vl_elw);
558 	debug("vid: vl_row=%d vslen=%d um=%d bm=%d\n",
559 		vid->vl_row, vid->vl_vpw,
560 		vid->vl_bfw, vid->vl_efw);
561 
562 	fbi->reg_lccr1 =
563 		LCCR1_DisWdth(vid->vl_col) +
564 		LCCR1_HorSnchWdth(vid->vl_hpw) +
565 		LCCR1_BegLnDel(vid->vl_blw) +
566 		LCCR1_EndLnDel(vid->vl_elw);
567 
568 	fbi->reg_lccr2 =
569 		LCCR2_DisHght(vid->vl_row) +
570 		LCCR2_VrtSnchWdth(vid->vl_vpw) +
571 		LCCR2_BegFrmDel(vid->vl_bfw) +
572 		LCCR2_EndFrmDel(vid->vl_efw);
573 
574 	fbi->reg_lccr3 = REG_LCCR3 & ~(LCCR3_HSP | LCCR3_VSP);
575 	fbi->reg_lccr3 |= (vid->vl_hsp ? LCCR3_HorSnchL : LCCR3_HorSnchH)
576 			| (vid->vl_vsp ? LCCR3_VrtSnchL : LCCR3_VrtSnchH);
577 
578 
579 	/* setup dma descriptors */
580 	fbi->dmadesc_fblow = (struct pxafb_dma_descriptor *)((unsigned int)fbi->palette - 3*16);
581 	fbi->dmadesc_fbhigh = (struct pxafb_dma_descriptor *)((unsigned int)fbi->palette - 2*16);
582 	fbi->dmadesc_palette = (struct pxafb_dma_descriptor *)((unsigned int)fbi->palette - 1*16);
583 
584 	#define BYTES_PER_PANEL	((fbi->reg_lccr0 & LCCR0_SDS) ? \
585 		(vid->vl_col * vid->vl_row * NBITS(vid->vl_bpix) / 8 / 2) : \
586 		(vid->vl_col * vid->vl_row * NBITS(vid->vl_bpix) / 8))
587 
588 	/* populate descriptors */
589 	fbi->dmadesc_fblow->fdadr = (u_long)fbi->dmadesc_fblow;
590 	fbi->dmadesc_fblow->fsadr = fbi->screen + BYTES_PER_PANEL;
591 	fbi->dmadesc_fblow->fidr  = 0;
592 	fbi->dmadesc_fblow->ldcmd = BYTES_PER_PANEL;
593 
594 	fbi->fdadr1 = (u_long)fbi->dmadesc_fblow; /* only used in dual-panel mode */
595 
596 	fbi->dmadesc_fbhigh->fsadr = fbi->screen;
597 	fbi->dmadesc_fbhigh->fidr = 0;
598 	fbi->dmadesc_fbhigh->ldcmd = BYTES_PER_PANEL;
599 
600 	fbi->dmadesc_palette->fsadr = fbi->palette;
601 	fbi->dmadesc_palette->fidr  = 0;
602 	fbi->dmadesc_palette->ldcmd = (fbi->palette_size * 2) | LDCMD_PAL;
603 
604 	if( NBITS(vid->vl_bpix) < 12)
605 	{
606 		/* assume any mode with <12 bpp is palette driven */
607 		fbi->dmadesc_palette->fdadr = (u_long)fbi->dmadesc_fbhigh;
608 		fbi->dmadesc_fbhigh->fdadr = (u_long)fbi->dmadesc_palette;
609 		/* flips back and forth between pal and fbhigh */
610 		fbi->fdadr0 = (u_long)fbi->dmadesc_palette;
611 	}
612 	else
613 	{
614 		/* palette shouldn't be loaded in true-color mode */
615 		fbi->dmadesc_fbhigh->fdadr = (u_long)fbi->dmadesc_fbhigh;
616 		fbi->fdadr0 = (u_long)fbi->dmadesc_fbhigh; /* no pal just fbhigh */
617 	}
618 
619 	debug("fbi->dmadesc_fblow = 0x%lx\n", (u_long)fbi->dmadesc_fblow);
620 	debug("fbi->dmadesc_fbhigh = 0x%lx\n", (u_long)fbi->dmadesc_fbhigh);
621 	debug("fbi->dmadesc_palette = 0x%lx\n", (u_long)fbi->dmadesc_palette);
622 
623 	debug("fbi->dmadesc_fblow->fdadr = 0x%lx\n", fbi->dmadesc_fblow->fdadr);
624 	debug("fbi->dmadesc_fbhigh->fdadr = 0x%lx\n", fbi->dmadesc_fbhigh->fdadr);
625 	debug("fbi->dmadesc_palette->fdadr = 0x%lx\n", fbi->dmadesc_palette->fdadr);
626 
627 	debug("fbi->dmadesc_fblow->fsadr = 0x%lx\n", fbi->dmadesc_fblow->fsadr);
628 	debug("fbi->dmadesc_fbhigh->fsadr = 0x%lx\n", fbi->dmadesc_fbhigh->fsadr);
629 	debug("fbi->dmadesc_palette->fsadr = 0x%lx\n", fbi->dmadesc_palette->fsadr);
630 
631 	debug("fbi->dmadesc_fblow->ldcmd = 0x%lx\n", fbi->dmadesc_fblow->ldcmd);
632 	debug("fbi->dmadesc_fbhigh->ldcmd = 0x%lx\n", fbi->dmadesc_fbhigh->ldcmd);
633 	debug("fbi->dmadesc_palette->ldcmd = 0x%lx\n", fbi->dmadesc_palette->ldcmd);
634 
635 	return 0;
636 }
637 
638 /************************************************************************/
639 /************************************************************************/
640 
641 #endif /* CONFIG_LCD */
642