xref: /openbmc/u-boot/drivers/video/pxa_lcd.c (revision e8f80a5a)
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * PXA LCD Controller
4  *
5  * (C) Copyright 2001-2002
6  * Wolfgang Denk, DENX Software Engineering -- wd@denx.de
7  */
8 
9 /************************************************************************/
10 /* ** HEADER FILES							*/
11 /************************************************************************/
12 
13 #include <common.h>
14 #include <asm/arch/pxa-regs.h>
15 #include <asm/io.h>
16 #include <lcd.h>
17 #include <linux/types.h>
18 #include <stdarg.h>
19 #include <stdio_dev.h>
20 
21 /* #define DEBUG */
22 
23 #ifdef CONFIG_LCD
24 
25 /*----------------------------------------------------------------------*/
26 /*
27  * Define panel bpp, LCCR0, LCCR3 and panel_info video struct for
28  * your display.
29  */
30 
31 #ifdef CONFIG_PXA_VGA
32 /* LCD outputs connected to a video DAC  */
33 # define LCD_BPP	LCD_COLOR8
34 
35 /* you have to set lccr0 and lccr3 (including pcd) */
36 # define REG_LCCR0	0x003008f8
37 # define REG_LCCR3	0x0300FF01
38 
39 /* 640x480x16 @ 61 Hz */
40 vidinfo_t panel_info = {
41 	.vl_col		= 640,
42 	.vl_row		= 480,
43 	.vl_width	= 640,
44 	.vl_height	= 480,
45 	.vl_clkp	= CONFIG_SYS_HIGH,
46 	.vl_oep		= CONFIG_SYS_HIGH,
47 	.vl_hsp		= CONFIG_SYS_HIGH,
48 	.vl_vsp		= CONFIG_SYS_HIGH,
49 	.vl_dp		= CONFIG_SYS_HIGH,
50 	.vl_bpix	= LCD_BPP,
51 	.vl_lbw		= 0,
52 	.vl_splt	= 0,
53 	.vl_clor	= 0,
54 	.vl_tft		= 1,
55 	.vl_hpw		= 40,
56 	.vl_blw		= 56,
57 	.vl_elw		= 56,
58 	.vl_vpw		= 20,
59 	.vl_bfw		= 8,
60 	.vl_efw		= 8,
61 };
62 #endif /* CONFIG_PXA_VIDEO */
63 
64 /*----------------------------------------------------------------------*/
65 #ifdef CONFIG_SHARP_LM8V31
66 
67 # define LCD_BPP	LCD_COLOR8
68 # define LCD_INVERT_COLORS	/* Needed for colors to be correct, but why?	*/
69 
70 /* you have to set lccr0 and lccr3 (including pcd) */
71 # define REG_LCCR0	0x0030087C
72 # define REG_LCCR3	0x0340FF08
73 
74 vidinfo_t panel_info = {
75 	.vl_col		= 640,
76 	.vl_row		= 480,
77 	.vl_width	= 157,
78 	.vl_height	= 118,
79 	.vl_clkp	= CONFIG_SYS_HIGH,
80 	.vl_oep		= CONFIG_SYS_HIGH,
81 	.vl_hsp		= CONFIG_SYS_HIGH,
82 	.vl_vsp		= CONFIG_SYS_HIGH,
83 	.vl_dp		= CONFIG_SYS_HIGH,
84 	.vl_bpix	= LCD_BPP,
85 	.vl_lbw		= 0,
86 	.vl_splt	= 1,
87 	.vl_clor	= 1,
88 	.vl_tft		= 0,
89 	.vl_hpw		= 1,
90 	.vl_blw		= 3,
91 	.vl_elw		= 3,
92 	.vl_vpw		= 1,
93 	.vl_bfw		= 0,
94 	.vl_efw		= 0,
95 };
96 #endif /* CONFIG_SHARP_LM8V31 */
97 /*----------------------------------------------------------------------*/
98 #ifdef CONFIG_VOIPAC_LCD
99 
100 # define LCD_BPP	LCD_COLOR8
101 # define LCD_INVERT_COLORS
102 
103 /* you have to set lccr0 and lccr3 (including pcd) */
104 # define REG_LCCR0	0x043008f8
105 # define REG_LCCR3	0x0340FF08
106 
107 vidinfo_t panel_info = {
108 	.vl_col		= 640,
109 	.vl_row		= 480,
110 	.vl_width	= 157,
111 	.vl_height	= 118,
112 	.vl_clkp	= CONFIG_SYS_HIGH,
113 	.vl_oep		= CONFIG_SYS_HIGH,
114 	.vl_hsp		= CONFIG_SYS_HIGH,
115 	.vl_vsp		= CONFIG_SYS_HIGH,
116 	.vl_dp		= CONFIG_SYS_HIGH,
117 	.vl_bpix	= LCD_BPP,
118 	.vl_lbw		= 0,
119 	.vl_splt	= 1,
120 	.vl_clor	= 1,
121 	.vl_tft		= 1,
122 	.vl_hpw		= 32,
123 	.vl_blw		= 144,
124 	.vl_elw		= 32,
125 	.vl_vpw		= 2,
126 	.vl_bfw		= 13,
127 	.vl_efw		= 30,
128 };
129 #endif /* CONFIG_VOIPAC_LCD */
130 
131 /*----------------------------------------------------------------------*/
132 #ifdef CONFIG_HITACHI_SX14
133 /* Hitachi SX14Q004-ZZA color STN LCD */
134 #define LCD_BPP		LCD_COLOR8
135 
136 /* you have to set lccr0 and lccr3 (including pcd) */
137 #define REG_LCCR0	0x00301079
138 #define REG_LCCR3	0x0340FF20
139 
140 vidinfo_t panel_info = {
141 	.vl_col		= 320,
142 	.vl_row		= 240,
143 	.vl_width	= 167,
144 	.vl_height	= 109,
145 	.vl_clkp	= CONFIG_SYS_HIGH,
146 	.vl_oep		= CONFIG_SYS_HIGH,
147 	.vl_hsp		= CONFIG_SYS_HIGH,
148 	.vl_vsp		= CONFIG_SYS_HIGH,
149 	.vl_dp		= CONFIG_SYS_HIGH,
150 	.vl_bpix	= LCD_BPP,
151 	.vl_lbw		= 1,
152 	.vl_splt	= 0,
153 	.vl_clor	= 1,
154 	.vl_tft		= 0,
155 	.vl_hpw		= 1,
156 	.vl_blw		= 1,
157 	.vl_elw		= 1,
158 	.vl_vpw		= 7,
159 	.vl_bfw		= 0,
160 	.vl_efw		= 0,
161 };
162 #endif /* CONFIG_HITACHI_SX14 */
163 
164 /*----------------------------------------------------------------------*/
165 #ifdef CONFIG_LMS283GF05
166 
167 # define LCD_BPP	LCD_COLOR8
168 /*# define LCD_INVERT_COLORS*/
169 
170 /* you have to set lccr0 and lccr3 (including pcd) */
171 # define REG_LCCR0	0x043008f8
172 # define REG_LCCR3	0x03b00009
173 
174 vidinfo_t panel_info = {
175 	.vl_col		= 240,
176 	.vl_row		= 320,
177 	.vl_rot		= 3,
178 	.vl_width	= 240,
179 	.vl_height	= 320,
180 	.vl_clkp	= CONFIG_SYS_HIGH,
181 	.vl_oep		= CONFIG_SYS_LOW,
182 	.vl_hsp		= CONFIG_SYS_LOW,
183 	.vl_vsp		= CONFIG_SYS_LOW,
184 	.vl_dp		= CONFIG_SYS_HIGH,
185 	.vl_bpix	= LCD_BPP,
186 	.vl_lbw		= 0,
187 	.vl_splt	= 1,
188 	.vl_clor	= 1,
189 	.vl_tft		= 1,
190 	.vl_hpw		= 4,
191 	.vl_blw		= 4,
192 	.vl_elw		= 8,
193 	.vl_vpw		= 4,
194 	.vl_bfw		= 4,
195 	.vl_efw		= 8,
196 };
197 #endif /* CONFIG_LMS283GF05 */
198 
199 /*----------------------------------------------------------------------*/
200 
201 #ifdef CONFIG_ACX517AKN
202 
203 # define LCD_BPP	LCD_COLOR8
204 
205 /* you have to set lccr0 and lccr3 (including pcd) */
206 # define REG_LCCR0	0x003008f9
207 # define REG_LCCR3	0x03700006
208 
209 vidinfo_t panel_info = {
210 	.vl_col		= 320,
211 	.vl_row		= 320,
212 	.vl_width	= 320,
213 	.vl_height	= 320,
214 	.vl_clkp	= CONFIG_SYS_HIGH,
215 	.vl_oep		= CONFIG_SYS_LOW,
216 	.vl_hsp		= CONFIG_SYS_LOW,
217 	.vl_vsp		= CONFIG_SYS_LOW,
218 	.vl_dp		= CONFIG_SYS_HIGH,
219 	.vl_bpix	= LCD_BPP,
220 	.vl_lbw		= 0,
221 	.vl_splt	= 1,
222 	.vl_clor	= 1,
223 	.vl_tft		= 1,
224 	.vl_hpw		= 0x04,
225 	.vl_blw		= 0x1c,
226 	.vl_elw		= 0x08,
227 	.vl_vpw		= 0x01,
228 	.vl_bfw		= 0x07,
229 	.vl_efw		= 0x08,
230 };
231 #endif /* CONFIG_ACX517AKN */
232 
233 #ifdef CONFIG_ACX544AKN
234 
235 # define LCD_BPP	LCD_COLOR16
236 
237 /* you have to set lccr0 and lccr3 (including pcd) */
238 # define REG_LCCR0	0x003008f9
239 # define REG_LCCR3	0x04700007 /* 16bpp */
240 
241 vidinfo_t panel_info = {
242 	.vl_col		= 320,
243 	.vl_row		= 320,
244 	.vl_width	= 320,
245 	.vl_height	= 320,
246 	.vl_clkp	= CONFIG_SYS_LOW,
247 	.vl_oep		= CONFIG_SYS_LOW,
248 	.vl_hsp		= CONFIG_SYS_LOW,
249 	.vl_vsp		= CONFIG_SYS_LOW,
250 	.vl_dp		= CONFIG_SYS_LOW,
251 	.vl_bpix	= LCD_BPP,
252 	.vl_lbw		= 0,
253 	.vl_splt	= 0,
254 	.vl_clor	= 1,
255 	.vl_tft		= 1,
256 	.vl_hpw		= 0x05,
257 	.vl_blw		= 0x13,
258 	.vl_elw		= 0x08,
259 	.vl_vpw		= 0x02,
260 	.vl_bfw		= 0x07,
261 	.vl_efw		= 0x05,
262 };
263 #endif /* CONFIG_ACX544AKN */
264 
265 /*----------------------------------------------------------------------*/
266 
267 #ifdef CONFIG_LQ038J7DH53
268 
269 # define LCD_BPP	LCD_COLOR8
270 
271 /* you have to set lccr0 and lccr3 (including pcd) */
272 # define REG_LCCR0	0x003008f9
273 # define REG_LCCR3	0x03700004
274 
275 vidinfo_t panel_info = {
276 	.vl_col		= 320,
277 	.vl_row		= 480,
278 	.vl_width	= 320,
279 	.vl_height	= 480,
280 	.vl_clkp	= CONFIG_SYS_HIGH,
281 	.vl_oep		= CONFIG_SYS_LOW,
282 	.vl_hsp		= CONFIG_SYS_LOW,
283 	.vl_vsp		= CONFIG_SYS_LOW,
284 	.vl_dp		= CONFIG_SYS_HIGH,
285 	.vl_bpix	= LCD_BPP,
286 	.vl_lbw		= 0,
287 	.vl_splt	= 1,
288 	.vl_clor	= 1,
289 	.vl_tft		= 1,
290 	.vl_hpw		= 0x04,
291 	.vl_blw		= 0x20,
292 	.vl_elw		= 0x01,
293 	.vl_vpw		= 0x01,
294 	.vl_bfw		= 0x04,
295 	.vl_efw		= 0x01,
296 };
297 #endif /* CONFIG_ACX517AKN */
298 
299 /*----------------------------------------------------------------------*/
300 
301 #ifdef CONFIG_LITTLETON_LCD
302 # define LCD_BPP	LCD_COLOR8
303 
304 /* you have to set lccr0 and lccr3 (including pcd) */
305 # define REG_LCCR0	0x003008f8
306 # define REG_LCCR3	0x0300FF04
307 
308 vidinfo_t panel_info = {
309 	.vl_col		= 480,
310 	.vl_row		= 640,
311 	.vl_width	= 480,
312 	.vl_height	= 640,
313 	.vl_clkp	= CONFIG_SYS_HIGH,
314 	.vl_oep		= CONFIG_SYS_HIGH,
315 	.vl_hsp		= CONFIG_SYS_HIGH,
316 	.vl_vsp		= CONFIG_SYS_HIGH,
317 	.vl_dp		= CONFIG_SYS_HIGH,
318 	.vl_bpix	= LCD_BPP,
319 	.vl_lbw		= 0,
320 	.vl_splt	= 0,
321 	.vl_clor	= 0,
322 	.vl_tft		= 1,
323 	.vl_hpw		= 9,
324 	.vl_blw		= 8,
325 	.vl_elw		= 24,
326 	.vl_vpw		= 2,
327 	.vl_bfw		= 2,
328 	.vl_efw		= 4,
329 };
330 #endif /* CONFIG_LITTLETON_LCD */
331 
332 /*----------------------------------------------------------------------*/
333 
334 static int pxafb_init_mem (void *lcdbase, vidinfo_t *vid);
335 static void pxafb_setup_gpio (vidinfo_t *vid);
336 static void pxafb_enable_controller (vidinfo_t *vid);
337 static int pxafb_init (vidinfo_t *vid);
338 
339 /************************************************************************/
340 /* ---------------  PXA chipset specific functions  ------------------- */
341 /************************************************************************/
342 
configuration_get_cmap(void)343 ushort *configuration_get_cmap(void)
344 {
345 	struct pxafb_info *fbi = &panel_info.pxa;
346 	return (ushort *)fbi->palette;
347 }
348 
lcd_ctrl_init(void * lcdbase)349 void lcd_ctrl_init (void *lcdbase)
350 {
351 	pxafb_init_mem(lcdbase, &panel_info);
352 	pxafb_init(&panel_info);
353 	pxafb_setup_gpio(&panel_info);
354 	pxafb_enable_controller(&panel_info);
355 }
356 
357 /*----------------------------------------------------------------------*/
358 #if LCD_BPP == LCD_COLOR8
359 void
lcd_setcolreg(ushort regno,ushort red,ushort green,ushort blue)360 lcd_setcolreg (ushort regno, ushort red, ushort green, ushort blue)
361 {
362 	struct pxafb_info *fbi = &panel_info.pxa;
363 	unsigned short *palette = (unsigned short *)fbi->palette;
364 	u_int val;
365 
366 	if (regno < fbi->palette_size) {
367 		val = ((red << 8) & 0xf800);
368 		val |= ((green << 4) & 0x07e0);
369 		val |= (blue & 0x001f);
370 
371 #ifdef LCD_INVERT_COLORS
372 		palette[regno] = ~val;
373 #else
374 		palette[regno] = val;
375 #endif
376 	}
377 
378 	debug ("setcolreg: reg %2d @ %p: R=%02X G=%02X B=%02X => %04X\n",
379 		regno, &palette[regno],
380 		red, green, blue,
381 		palette[regno]);
382 }
383 #endif /* LCD_COLOR8 */
384 
385 /*----------------------------------------------------------------------*/
lcd_enable(void)386 __weak void lcd_enable(void)
387 {
388 }
389 
390 /************************************************************************/
391 /* ** PXA255 specific routines						*/
392 /************************************************************************/
393 
394 /*
395  * Calculate fb size for VIDEOLFB_ATAG. Size returned contains fb,
396  * descriptors and palette areas.
397  */
calc_fbsize(void)398 ulong calc_fbsize (void)
399 {
400 	ulong size;
401 	int line_length = (panel_info.vl_col * NBITS (panel_info.vl_bpix)) / 8;
402 
403 	size = line_length * panel_info.vl_row;
404 	size += PAGE_SIZE;
405 
406 	return size;
407 }
408 
pxafb_init_mem(void * lcdbase,vidinfo_t * vid)409 static int pxafb_init_mem (void *lcdbase, vidinfo_t *vid)
410 {
411 	u_long palette_mem_size;
412 	struct pxafb_info *fbi = &vid->pxa;
413 	int fb_size = vid->vl_row * (vid->vl_col * NBITS (vid->vl_bpix)) / 8;
414 
415 	fbi->screen = (u_long)lcdbase;
416 
417 	fbi->palette_size = NBITS(vid->vl_bpix) == 8 ? 256 : 16;
418 	palette_mem_size = fbi->palette_size * sizeof(u16);
419 
420 	debug("palette_mem_size = 0x%08lx\n", (u_long) palette_mem_size);
421 	/* locate palette and descs at end of page following fb */
422 	fbi->palette = (u_long)lcdbase + fb_size + PAGE_SIZE - palette_mem_size;
423 
424 	return 0;
425 }
426 #ifdef	CONFIG_CPU_MONAHANS
pxafb_setup_gpio(vidinfo_t * vid)427 static inline void pxafb_setup_gpio (vidinfo_t *vid) {}
428 #else
pxafb_setup_gpio(vidinfo_t * vid)429 static void pxafb_setup_gpio (vidinfo_t *vid)
430 {
431 	u_long lccr0;
432 
433 	/*
434 	 * setup is based on type of panel supported
435 	 */
436 
437 	lccr0 = vid->pxa.reg_lccr0;
438 
439 	/* 4 bit interface */
440 	if ((lccr0 & LCCR0_CMS) && (lccr0 & LCCR0_SDS) && !(lccr0 & LCCR0_DPD))
441 	{
442 		debug("Setting GPIO for 4 bit data\n");
443 		/* bits 58-61 */
444 		writel(readl(GPDR1) | (0xf << 26), GPDR1);
445 		writel((readl(GAFR1_U) & ~(0xff << 20)) | (0xaa << 20),
446 			GAFR1_U);
447 
448 		/* bits 74-77 */
449 		writel(readl(GPDR2) | (0xf << 10), GPDR2);
450 		writel((readl(GAFR2_L) & ~(0xff << 20)) | (0xaa << 20),
451 			GAFR2_L);
452 	}
453 
454 	/* 8 bit interface */
455 	else if (((lccr0 & LCCR0_CMS) && ((lccr0 & LCCR0_SDS) || (lccr0 & LCCR0_DPD))) ||
456 		(!(lccr0 & LCCR0_CMS) && !(lccr0 & LCCR0_PAS) && !(lccr0 & LCCR0_SDS)))
457 	{
458 		debug("Setting GPIO for 8 bit data\n");
459 		/* bits 58-65 */
460 		writel(readl(GPDR1) | (0x3f << 26), GPDR1);
461 		writel(readl(GPDR2) | (0x3), GPDR2);
462 
463 		writel((readl(GAFR1_U) & ~(0xfff << 20)) | (0xaaa << 20),
464 			GAFR1_U);
465 		writel((readl(GAFR2_L) & ~0xf) | (0xa), GAFR2_L);
466 
467 		/* bits 74-77 */
468 		writel(readl(GPDR2) | (0xf << 10), GPDR2);
469 		writel((readl(GAFR2_L) & ~(0xff << 20)) | (0xaa << 20),
470 			GAFR2_L);
471 	}
472 
473 	/* 16 bit interface */
474 	else if (!(lccr0 & LCCR0_CMS) && ((lccr0 & LCCR0_SDS) || (lccr0 & LCCR0_PAS)))
475 	{
476 		debug("Setting GPIO for 16 bit data\n");
477 		/* bits 58-77 */
478 		writel(readl(GPDR1) | (0x3f << 26), GPDR1);
479 		writel(readl(GPDR2) | 0x00003fff, GPDR2);
480 
481 		writel((readl(GAFR1_U) & ~(0xfff << 20)) | (0xaaa << 20),
482 			GAFR1_U);
483 		writel((readl(GAFR2_L) & 0xf0000000) | 0x0aaaaaaa, GAFR2_L);
484 	}
485 	else
486 	{
487 		printf("pxafb_setup_gpio: unable to determine bits per pixel\n");
488 	}
489 }
490 #endif
491 
pxafb_enable_controller(vidinfo_t * vid)492 static void pxafb_enable_controller (vidinfo_t *vid)
493 {
494 	debug("Enabling LCD controller\n");
495 
496 	/* Sequence from 11.7.10 */
497 	writel(vid->pxa.reg_lccr3, LCCR3);
498 	writel(vid->pxa.reg_lccr2, LCCR2);
499 	writel(vid->pxa.reg_lccr1, LCCR1);
500 	writel(vid->pxa.reg_lccr0 & ~LCCR0_ENB, LCCR0);
501 	writel(vid->pxa.fdadr0, FDADR0);
502 	writel(vid->pxa.fdadr1, FDADR1);
503 	writel(readl(LCCR0) | LCCR0_ENB, LCCR0);
504 
505 #ifdef	CONFIG_CPU_MONAHANS
506 	writel(readl(CKENA) | CKENA_1_LCD, CKENA);
507 #else
508 	writel(readl(CKEN) | CKEN16_LCD, CKEN);
509 #endif
510 
511 	debug("FDADR0 = 0x%08x\n", readl(FDADR0));
512 	debug("FDADR1 = 0x%08x\n", readl(FDADR1));
513 	debug("LCCR0 = 0x%08x\n", readl(LCCR0));
514 	debug("LCCR1 = 0x%08x\n", readl(LCCR1));
515 	debug("LCCR2 = 0x%08x\n", readl(LCCR2));
516 	debug("LCCR3 = 0x%08x\n", readl(LCCR3));
517 }
518 
pxafb_init(vidinfo_t * vid)519 static int pxafb_init (vidinfo_t *vid)
520 {
521 	struct pxafb_info *fbi = &vid->pxa;
522 
523 	debug("Configuring PXA LCD\n");
524 
525 	fbi->reg_lccr0 = REG_LCCR0;
526 	fbi->reg_lccr3 = REG_LCCR3;
527 
528 	debug("vid: vl_col=%d hslen=%d lm=%d rm=%d\n",
529 		vid->vl_col, vid->vl_hpw,
530 		vid->vl_blw, vid->vl_elw);
531 	debug("vid: vl_row=%d vslen=%d um=%d bm=%d\n",
532 		vid->vl_row, vid->vl_vpw,
533 		vid->vl_bfw, vid->vl_efw);
534 
535 	fbi->reg_lccr1 =
536 		LCCR1_DisWdth(vid->vl_col) +
537 		LCCR1_HorSnchWdth(vid->vl_hpw) +
538 		LCCR1_BegLnDel(vid->vl_blw) +
539 		LCCR1_EndLnDel(vid->vl_elw);
540 
541 	fbi->reg_lccr2 =
542 		LCCR2_DisHght(vid->vl_row) +
543 		LCCR2_VrtSnchWdth(vid->vl_vpw) +
544 		LCCR2_BegFrmDel(vid->vl_bfw) +
545 		LCCR2_EndFrmDel(vid->vl_efw);
546 
547 	fbi->reg_lccr3 = REG_LCCR3 & ~(LCCR3_HSP | LCCR3_VSP);
548 	fbi->reg_lccr3 |= (vid->vl_hsp ? LCCR3_HorSnchL : LCCR3_HorSnchH)
549 			| (vid->vl_vsp ? LCCR3_VrtSnchL : LCCR3_VrtSnchH);
550 
551 
552 	/* setup dma descriptors */
553 	fbi->dmadesc_fblow = (struct pxafb_dma_descriptor *)((unsigned int)fbi->palette - 3*16);
554 	fbi->dmadesc_fbhigh = (struct pxafb_dma_descriptor *)((unsigned int)fbi->palette - 2*16);
555 	fbi->dmadesc_palette = (struct pxafb_dma_descriptor *)((unsigned int)fbi->palette - 1*16);
556 
557 	#define BYTES_PER_PANEL	((fbi->reg_lccr0 & LCCR0_SDS) ? \
558 		(vid->vl_col * vid->vl_row * NBITS(vid->vl_bpix) / 8 / 2) : \
559 		(vid->vl_col * vid->vl_row * NBITS(vid->vl_bpix) / 8))
560 
561 	/* populate descriptors */
562 	fbi->dmadesc_fblow->fdadr = (u_long)fbi->dmadesc_fblow;
563 	fbi->dmadesc_fblow->fsadr = fbi->screen + BYTES_PER_PANEL;
564 	fbi->dmadesc_fblow->fidr  = 0;
565 	fbi->dmadesc_fblow->ldcmd = BYTES_PER_PANEL;
566 
567 	fbi->fdadr1 = (u_long)fbi->dmadesc_fblow; /* only used in dual-panel mode */
568 
569 	fbi->dmadesc_fbhigh->fsadr = fbi->screen;
570 	fbi->dmadesc_fbhigh->fidr = 0;
571 	fbi->dmadesc_fbhigh->ldcmd = BYTES_PER_PANEL;
572 
573 	fbi->dmadesc_palette->fsadr = fbi->palette;
574 	fbi->dmadesc_palette->fidr  = 0;
575 	fbi->dmadesc_palette->ldcmd = (fbi->palette_size * 2) | LDCMD_PAL;
576 
577 	if( NBITS(vid->vl_bpix) < 12)
578 	{
579 		/* assume any mode with <12 bpp is palette driven */
580 		fbi->dmadesc_palette->fdadr = (u_long)fbi->dmadesc_fbhigh;
581 		fbi->dmadesc_fbhigh->fdadr = (u_long)fbi->dmadesc_palette;
582 		/* flips back and forth between pal and fbhigh */
583 		fbi->fdadr0 = (u_long)fbi->dmadesc_palette;
584 	}
585 	else
586 	{
587 		/* palette shouldn't be loaded in true-color mode */
588 		fbi->dmadesc_fbhigh->fdadr = (u_long)fbi->dmadesc_fbhigh;
589 		fbi->fdadr0 = (u_long)fbi->dmadesc_fbhigh; /* no pal just fbhigh */
590 	}
591 
592 	debug("fbi->dmadesc_fblow = 0x%lx\n", (u_long)fbi->dmadesc_fblow);
593 	debug("fbi->dmadesc_fbhigh = 0x%lx\n", (u_long)fbi->dmadesc_fbhigh);
594 	debug("fbi->dmadesc_palette = 0x%lx\n", (u_long)fbi->dmadesc_palette);
595 
596 	debug("fbi->dmadesc_fblow->fdadr = 0x%lx\n", fbi->dmadesc_fblow->fdadr);
597 	debug("fbi->dmadesc_fbhigh->fdadr = 0x%lx\n", fbi->dmadesc_fbhigh->fdadr);
598 	debug("fbi->dmadesc_palette->fdadr = 0x%lx\n", fbi->dmadesc_palette->fdadr);
599 
600 	debug("fbi->dmadesc_fblow->fsadr = 0x%lx\n", fbi->dmadesc_fblow->fsadr);
601 	debug("fbi->dmadesc_fbhigh->fsadr = 0x%lx\n", fbi->dmadesc_fbhigh->fsadr);
602 	debug("fbi->dmadesc_palette->fsadr = 0x%lx\n", fbi->dmadesc_palette->fsadr);
603 
604 	debug("fbi->dmadesc_fblow->ldcmd = 0x%lx\n", fbi->dmadesc_fblow->ldcmd);
605 	debug("fbi->dmadesc_fbhigh->ldcmd = 0x%lx\n", fbi->dmadesc_fbhigh->ldcmd);
606 	debug("fbi->dmadesc_palette->ldcmd = 0x%lx\n", fbi->dmadesc_palette->ldcmd);
607 
608 	return 0;
609 }
610 
611 /************************************************************************/
612 /************************************************************************/
613 
614 #endif /* CONFIG_LCD */
615