1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Framebuffer driver for TI OMAP boards
4  *
5  * Copyright (C) 2004 Nokia Corporation
6  * Author: Imre Deak <imre.deak@nokia.com>
7  *
8  * Acknowledgements:
9  *   Alex McMains <aam@ridgerun.com>       - Original driver
10  *   Juha Yrjola <juha.yrjola@nokia.com>   - Original driver and improvements
11  *   Dirk Behme <dirk.behme@de.bosch.com>  - changes for 2.6 kernel API
12  *   Texas Instruments                     - H3 support
13  */
14 #include <linux/platform_device.h>
15 #include <linux/mm.h>
16 #include <linux/slab.h>
17 #include <linux/uaccess.h>
18 #include <linux/module.h>
19 #include <linux/sysfs.h>
20 
21 #include <linux/omap-dma.h>
22 
23 #include <linux/soc/ti/omap1-soc.h>
24 #include "omapfb.h"
25 #include "lcdc.h"
26 
27 #define MODULE_NAME	"omapfb"
28 
29 static unsigned int	def_accel;
30 static unsigned long	def_vram[OMAPFB_PLANE_NUM];
31 static unsigned int	def_vram_cnt;
32 static unsigned long	def_vxres;
33 static unsigned long	def_vyres;
34 static unsigned int	def_rotate;
35 static unsigned int	def_mirror;
36 
37 static bool	manual_update = IS_BUILTIN(CONFIG_FB_OMAP_MANUAL_UPDATE);
38 
39 static struct platform_device	*fbdev_pdev;
40 static struct lcd_panel		*fbdev_panel;
41 static struct omapfb_device	*omapfb_dev;
42 
43 struct caps_table_struct {
44 	unsigned long flag;
45 	const char *name;
46 };
47 
48 static const struct caps_table_struct ctrl_caps[] = {
49 	{ OMAPFB_CAPS_MANUAL_UPDATE,  "manual update" },
50 	{ OMAPFB_CAPS_TEARSYNC,       "tearing synchronization" },
51 	{ OMAPFB_CAPS_PLANE_RELOCATE_MEM, "relocate plane memory" },
52 	{ OMAPFB_CAPS_PLANE_SCALE,    "scale plane" },
53 	{ OMAPFB_CAPS_WINDOW_PIXEL_DOUBLE, "pixel double window" },
54 	{ OMAPFB_CAPS_WINDOW_SCALE,   "scale window" },
55 	{ OMAPFB_CAPS_WINDOW_OVERLAY, "overlay window" },
56 	{ OMAPFB_CAPS_WINDOW_ROTATE,  "rotate window" },
57 	{ OMAPFB_CAPS_SET_BACKLIGHT,  "backlight setting" },
58 };
59 
60 static const struct caps_table_struct color_caps[] = {
61 	{ 1 << OMAPFB_COLOR_RGB565,	"RGB565", },
62 	{ 1 << OMAPFB_COLOR_YUV422,	"YUV422", },
63 	{ 1 << OMAPFB_COLOR_YUV420,	"YUV420", },
64 	{ 1 << OMAPFB_COLOR_CLUT_8BPP,	"CLUT8", },
65 	{ 1 << OMAPFB_COLOR_CLUT_4BPP,	"CLUT4", },
66 	{ 1 << OMAPFB_COLOR_CLUT_2BPP,	"CLUT2", },
67 	{ 1 << OMAPFB_COLOR_CLUT_1BPP,	"CLUT1", },
68 	{ 1 << OMAPFB_COLOR_RGB444,	"RGB444", },
69 	{ 1 << OMAPFB_COLOR_YUY422,	"YUY422", },
70 };
71 
72 static void omapdss_release(struct device *dev)
73 {
74 }
75 
76 /* dummy device for clocks */
77 static struct platform_device omapdss_device = {
78 	.name		= "omapdss_dss",
79 	.id		= -1,
80 	.dev            = {
81 		.release = omapdss_release,
82 	},
83 };
84 
85 /*
86  * ---------------------------------------------------------------------------
87  * LCD panel
88  * ---------------------------------------------------------------------------
89  */
90 extern struct lcd_ctrl hwa742_ctrl;
91 
92 static const struct lcd_ctrl *ctrls[] = {
93 	&omap1_int_ctrl,
94 
95 #ifdef CONFIG_FB_OMAP_LCDC_HWA742
96 	&hwa742_ctrl,
97 #endif
98 };
99 
100 #ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL
101 extern struct lcd_ctrl_extif omap1_ext_if;
102 #endif
103 
104 static void omapfb_rqueue_lock(struct omapfb_device *fbdev)
105 {
106 	mutex_lock(&fbdev->rqueue_mutex);
107 }
108 
109 static void omapfb_rqueue_unlock(struct omapfb_device *fbdev)
110 {
111 	mutex_unlock(&fbdev->rqueue_mutex);
112 }
113 
114 /*
115  * ---------------------------------------------------------------------------
116  * LCD controller and LCD DMA
117  * ---------------------------------------------------------------------------
118  */
119 /*
120  * Allocate resources needed for LCD controller and LCD DMA operations. Video
121  * memory is allocated from system memory according to the virtual display
122  * size, except if a bigger memory size is specified explicitly as a kernel
123  * parameter.
124  */
125 static int ctrl_init(struct omapfb_device *fbdev)
126 {
127 	int r;
128 	int i;
129 
130 	/* kernel/module vram parameters override boot tags/board config */
131 	if (def_vram_cnt) {
132 		for (i = 0; i < def_vram_cnt; i++)
133 			fbdev->mem_desc.region[i].size =
134 				PAGE_ALIGN(def_vram[i]);
135 		fbdev->mem_desc.region_cnt = i;
136 	}
137 
138 	if (!fbdev->mem_desc.region_cnt) {
139 		struct lcd_panel *panel = fbdev->panel;
140 		int def_size;
141 		int bpp = panel->bpp;
142 
143 		/* 12 bpp is packed in 16 bits */
144 		if (bpp == 12)
145 			bpp = 16;
146 		def_size = def_vxres * def_vyres * bpp / 8;
147 		fbdev->mem_desc.region_cnt = 1;
148 		fbdev->mem_desc.region[0].size = PAGE_ALIGN(def_size);
149 	}
150 	r = fbdev->ctrl->init(fbdev, 0, &fbdev->mem_desc);
151 	if (r < 0) {
152 		dev_err(fbdev->dev, "controller initialization failed (%d)\n",
153 			r);
154 		return r;
155 	}
156 
157 #ifdef DEBUG
158 	for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
159 		dev_dbg(fbdev->dev, "region%d phys %08x virt %p size=%lu\n",
160 			 i,
161 			 fbdev->mem_desc.region[i].paddr,
162 			 fbdev->mem_desc.region[i].vaddr,
163 			 fbdev->mem_desc.region[i].size);
164 	}
165 #endif
166 	return 0;
167 }
168 
169 static void ctrl_cleanup(struct omapfb_device *fbdev)
170 {
171 	fbdev->ctrl->cleanup();
172 }
173 
174 /* Must be called with fbdev->rqueue_mutex held. */
175 static int ctrl_change_mode(struct fb_info *fbi)
176 {
177 	int r;
178 	unsigned long offset;
179 	struct omapfb_plane_struct *plane = fbi->par;
180 	struct omapfb_device *fbdev = plane->fbdev;
181 	struct fb_var_screeninfo *var = &fbi->var;
182 
183 	offset = var->yoffset * fbi->fix.line_length +
184 		 var->xoffset * var->bits_per_pixel / 8;
185 
186 	if (fbdev->ctrl->sync)
187 		fbdev->ctrl->sync();
188 	r = fbdev->ctrl->setup_plane(plane->idx, plane->info.channel_out,
189 				 offset, var->xres_virtual,
190 				 plane->info.pos_x, plane->info.pos_y,
191 				 var->xres, var->yres, plane->color_mode);
192 	if (r < 0)
193 		return r;
194 
195 	if (fbdev->ctrl->set_rotate != NULL) {
196 		r = fbdev->ctrl->set_rotate(var->rotate);
197 		if (r < 0)
198 			return r;
199 	}
200 
201 	if (fbdev->ctrl->set_scale != NULL)
202 		r = fbdev->ctrl->set_scale(plane->idx,
203 				   var->xres, var->yres,
204 				   plane->info.out_width,
205 				   plane->info.out_height);
206 
207 	return r;
208 }
209 
210 /*
211  * ---------------------------------------------------------------------------
212  * fbdev framework callbacks and the ioctl interface
213  * ---------------------------------------------------------------------------
214  */
215 /* Called each time the omapfb device is opened */
216 static int omapfb_open(struct fb_info *info, int user)
217 {
218 	return 0;
219 }
220 
221 static void omapfb_sync(struct fb_info *info);
222 
223 /* Called when the omapfb device is closed. We make sure that any pending
224  * gfx DMA operations are ended, before we return. */
225 static int omapfb_release(struct fb_info *info, int user)
226 {
227 	omapfb_sync(info);
228 	return 0;
229 }
230 
231 /* Store a single color palette entry into a pseudo palette or the hardware
232  * palette if one is available. For now we support only 16bpp and thus store
233  * the entry only to the pseudo palette.
234  */
235 static int _setcolreg(struct fb_info *info, u_int regno, u_int red, u_int green,
236 			u_int blue, u_int transp, int update_hw_pal)
237 {
238 	struct omapfb_plane_struct *plane = info->par;
239 	struct omapfb_device *fbdev = plane->fbdev;
240 	struct fb_var_screeninfo *var = &info->var;
241 	int r = 0;
242 
243 	switch (plane->color_mode) {
244 	case OMAPFB_COLOR_YUV422:
245 	case OMAPFB_COLOR_YUV420:
246 	case OMAPFB_COLOR_YUY422:
247 		r = -EINVAL;
248 		break;
249 	case OMAPFB_COLOR_CLUT_8BPP:
250 	case OMAPFB_COLOR_CLUT_4BPP:
251 	case OMAPFB_COLOR_CLUT_2BPP:
252 	case OMAPFB_COLOR_CLUT_1BPP:
253 		if (fbdev->ctrl->setcolreg)
254 			r = fbdev->ctrl->setcolreg(regno, red, green, blue,
255 							transp, update_hw_pal);
256 		fallthrough;
257 	case OMAPFB_COLOR_RGB565:
258 	case OMAPFB_COLOR_RGB444:
259 		if (r != 0)
260 			break;
261 
262 		if (regno < 16) {
263 			u16 pal;
264 			pal = ((red >> (16 - var->red.length)) <<
265 					var->red.offset) |
266 			      ((green >> (16 - var->green.length)) <<
267 					var->green.offset) |
268 			      (blue >> (16 - var->blue.length));
269 			((u32 *)(info->pseudo_palette))[regno] = pal;
270 		}
271 		break;
272 	default:
273 		BUG();
274 	}
275 	return r;
276 }
277 
278 static int omapfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
279 			    u_int transp, struct fb_info *info)
280 {
281 	return _setcolreg(info, regno, red, green, blue, transp, 1);
282 }
283 
284 static int omapfb_setcmap(struct fb_cmap *cmap, struct fb_info *info)
285 {
286 	int count, index, r;
287 	u16 *red, *green, *blue, *transp;
288 	u16 trans = 0xffff;
289 
290 	red     = cmap->red;
291 	green   = cmap->green;
292 	blue    = cmap->blue;
293 	transp  = cmap->transp;
294 	index   = cmap->start;
295 
296 	for (count = 0; count < cmap->len; count++) {
297 		if (transp)
298 			trans = *transp++;
299 		r = _setcolreg(info, index++, *red++, *green++, *blue++, trans,
300 				count == cmap->len - 1);
301 		if (r != 0)
302 			return r;
303 	}
304 
305 	return 0;
306 }
307 
308 static int omapfb_update_full_screen(struct fb_info *fbi);
309 
310 static int omapfb_blank(int blank, struct fb_info *fbi)
311 {
312 	struct omapfb_plane_struct *plane = fbi->par;
313 	struct omapfb_device *fbdev = plane->fbdev;
314 	int do_update = 0;
315 	int r = 0;
316 
317 	omapfb_rqueue_lock(fbdev);
318 	switch (blank) {
319 	case FB_BLANK_UNBLANK:
320 		if (fbdev->state == OMAPFB_SUSPENDED) {
321 			if (fbdev->ctrl->resume)
322 				fbdev->ctrl->resume();
323 			if (fbdev->panel->enable)
324 				fbdev->panel->enable(fbdev->panel);
325 			fbdev->state = OMAPFB_ACTIVE;
326 			if (fbdev->ctrl->get_update_mode() ==
327 					OMAPFB_MANUAL_UPDATE)
328 				do_update = 1;
329 		}
330 		break;
331 	case FB_BLANK_POWERDOWN:
332 		if (fbdev->state == OMAPFB_ACTIVE) {
333 			if (fbdev->panel->disable)
334 				fbdev->panel->disable(fbdev->panel);
335 			if (fbdev->ctrl->suspend)
336 				fbdev->ctrl->suspend();
337 			fbdev->state = OMAPFB_SUSPENDED;
338 		}
339 		break;
340 	default:
341 		r = -EINVAL;
342 	}
343 	omapfb_rqueue_unlock(fbdev);
344 
345 	if (r == 0 && do_update)
346 		r = omapfb_update_full_screen(fbi);
347 
348 	return r;
349 }
350 
351 static void omapfb_sync(struct fb_info *fbi)
352 {
353 	struct omapfb_plane_struct *plane = fbi->par;
354 	struct omapfb_device *fbdev = plane->fbdev;
355 
356 	omapfb_rqueue_lock(fbdev);
357 	if (fbdev->ctrl->sync)
358 		fbdev->ctrl->sync();
359 	omapfb_rqueue_unlock(fbdev);
360 }
361 
362 /*
363  * Set fb_info.fix fields and also updates fbdev.
364  * When calling this fb_info.var must be set up already.
365  */
366 static void set_fb_fix(struct fb_info *fbi, int from_init)
367 {
368 	struct fb_fix_screeninfo *fix = &fbi->fix;
369 	struct fb_var_screeninfo *var = &fbi->var;
370 	struct omapfb_plane_struct *plane = fbi->par;
371 	struct omapfb_mem_region *rg;
372 	int bpp;
373 
374 	rg = &plane->fbdev->mem_desc.region[plane->idx];
375 	fbi->screen_base	= rg->vaddr;
376 
377 	if (!from_init) {
378 		mutex_lock(&fbi->mm_lock);
379 		fix->smem_start		= rg->paddr;
380 		fix->smem_len		= rg->size;
381 		mutex_unlock(&fbi->mm_lock);
382 	} else {
383 		fix->smem_start		= rg->paddr;
384 		fix->smem_len		= rg->size;
385 	}
386 
387 	fix->type = FB_TYPE_PACKED_PIXELS;
388 	bpp = var->bits_per_pixel;
389 	if (var->nonstd)
390 		fix->visual = FB_VISUAL_PSEUDOCOLOR;
391 	else switch (var->bits_per_pixel) {
392 	case 16:
393 	case 12:
394 		fix->visual = FB_VISUAL_TRUECOLOR;
395 		/* 12bpp is stored in 16 bits */
396 		bpp = 16;
397 		break;
398 	case 1:
399 	case 2:
400 	case 4:
401 	case 8:
402 		fix->visual = FB_VISUAL_PSEUDOCOLOR;
403 		break;
404 	}
405 	fix->accel		= FB_ACCEL_OMAP1610;
406 	fix->line_length	= var->xres_virtual * bpp / 8;
407 }
408 
409 static int set_color_mode(struct omapfb_plane_struct *plane,
410 			  struct fb_var_screeninfo *var)
411 {
412 	switch (var->nonstd) {
413 	case 0:
414 		break;
415 	case OMAPFB_COLOR_YUV422:
416 		var->bits_per_pixel = 16;
417 		plane->color_mode = var->nonstd;
418 		return 0;
419 	case OMAPFB_COLOR_YUV420:
420 		var->bits_per_pixel = 12;
421 		plane->color_mode = var->nonstd;
422 		return 0;
423 	case OMAPFB_COLOR_YUY422:
424 		var->bits_per_pixel = 16;
425 		plane->color_mode = var->nonstd;
426 		return 0;
427 	default:
428 		return -EINVAL;
429 	}
430 
431 	switch (var->bits_per_pixel) {
432 	case 1:
433 		plane->color_mode = OMAPFB_COLOR_CLUT_1BPP;
434 		return 0;
435 	case 2:
436 		plane->color_mode = OMAPFB_COLOR_CLUT_2BPP;
437 		return 0;
438 	case 4:
439 		plane->color_mode = OMAPFB_COLOR_CLUT_4BPP;
440 		return 0;
441 	case 8:
442 		plane->color_mode = OMAPFB_COLOR_CLUT_8BPP;
443 		return 0;
444 	case 12:
445 		var->bits_per_pixel = 16;
446 		fallthrough;
447 	case 16:
448 		if (plane->fbdev->panel->bpp == 12)
449 			plane->color_mode = OMAPFB_COLOR_RGB444;
450 		else
451 			plane->color_mode = OMAPFB_COLOR_RGB565;
452 		return 0;
453 	default:
454 		return -EINVAL;
455 	}
456 }
457 
458 /*
459  * Check the values in var against our capabilities and in case of out of
460  * bound values try to adjust them.
461  */
462 static int set_fb_var(struct fb_info *fbi,
463 		      struct fb_var_screeninfo *var)
464 {
465 	int		bpp;
466 	unsigned long	max_frame_size;
467 	unsigned long	line_size;
468 	int		xres_min, xres_max;
469 	int		yres_min, yres_max;
470 	struct omapfb_plane_struct *plane = fbi->par;
471 	struct omapfb_device *fbdev = plane->fbdev;
472 	struct lcd_panel *panel = fbdev->panel;
473 
474 	if (set_color_mode(plane, var) < 0)
475 		return -EINVAL;
476 
477 	bpp = var->bits_per_pixel;
478 	if (plane->color_mode == OMAPFB_COLOR_RGB444)
479 		bpp = 16;
480 
481 	switch (var->rotate) {
482 	case 0:
483 	case 180:
484 		xres_min = OMAPFB_PLANE_XRES_MIN;
485 		xres_max = panel->x_res;
486 		yres_min = OMAPFB_PLANE_YRES_MIN;
487 		yres_max = panel->y_res;
488 		if (cpu_is_omap15xx()) {
489 			var->xres = panel->x_res;
490 			var->yres = panel->y_res;
491 		}
492 		break;
493 	case 90:
494 	case 270:
495 		xres_min = OMAPFB_PLANE_YRES_MIN;
496 		xres_max = panel->y_res;
497 		yres_min = OMAPFB_PLANE_XRES_MIN;
498 		yres_max = panel->x_res;
499 		if (cpu_is_omap15xx()) {
500 			var->xres = panel->y_res;
501 			var->yres = panel->x_res;
502 		}
503 		break;
504 	default:
505 		return -EINVAL;
506 	}
507 
508 	if (var->xres < xres_min)
509 		var->xres = xres_min;
510 	if (var->yres < yres_min)
511 		var->yres = yres_min;
512 	if (var->xres > xres_max)
513 		var->xres = xres_max;
514 	if (var->yres > yres_max)
515 		var->yres = yres_max;
516 
517 	if (var->xres_virtual < var->xres)
518 		var->xres_virtual = var->xres;
519 	if (var->yres_virtual < var->yres)
520 		var->yres_virtual = var->yres;
521 	max_frame_size = fbdev->mem_desc.region[plane->idx].size;
522 	line_size = var->xres_virtual * bpp / 8;
523 	if (line_size * var->yres_virtual > max_frame_size) {
524 		/* Try to keep yres_virtual first */
525 		line_size = max_frame_size / var->yres_virtual;
526 		var->xres_virtual = line_size * 8 / bpp;
527 		if (var->xres_virtual < var->xres) {
528 			/* Still doesn't fit. Shrink yres_virtual too */
529 			var->xres_virtual = var->xres;
530 			line_size = var->xres * bpp / 8;
531 			var->yres_virtual = max_frame_size / line_size;
532 		}
533 		/* Recheck this, as the virtual size changed. */
534 		if (var->xres_virtual < var->xres)
535 			var->xres = var->xres_virtual;
536 		if (var->yres_virtual < var->yres)
537 			var->yres = var->yres_virtual;
538 		if (var->xres < xres_min || var->yres < yres_min)
539 			return -EINVAL;
540 	}
541 	if (var->xres + var->xoffset > var->xres_virtual)
542 		var->xoffset = var->xres_virtual - var->xres;
543 	if (var->yres + var->yoffset > var->yres_virtual)
544 		var->yoffset = var->yres_virtual - var->yres;
545 
546 	if (plane->color_mode == OMAPFB_COLOR_RGB444) {
547 		var->red.offset		= 8;
548 		var->red.length		= 4;
549 		var->red.msb_right	= 0;
550 		var->green.offset	= 4;
551 		var->green.length	= 4;
552 		var->green.msb_right	= 0;
553 		var->blue.offset	= 0;
554 		var->blue.length	= 4;
555 		var->blue.msb_right	= 0;
556 	} else {
557 		var->red.offset		= 11;
558 		var->red.length		= 5;
559 		var->red.msb_right	= 0;
560 		var->green.offset	= 5;
561 		var->green.length	= 6;
562 		var->green.msb_right	= 0;
563 		var->blue.offset	= 0;
564 		var->blue.length	= 5;
565 		var->blue.msb_right	= 0;
566 	}
567 
568 	var->height		= -1;
569 	var->width		= -1;
570 	var->grayscale		= 0;
571 
572 	/* pixclock in ps, the rest in pixclock */
573 	var->pixclock		= 10000000 / (panel->pixel_clock / 100);
574 	var->left_margin	= panel->hfp;
575 	var->right_margin	= panel->hbp;
576 	var->upper_margin	= panel->vfp;
577 	var->lower_margin	= panel->vbp;
578 	var->hsync_len		= panel->hsw;
579 	var->vsync_len		= panel->vsw;
580 
581 	/* TODO: get these from panel->config */
582 	var->vmode		= FB_VMODE_NONINTERLACED;
583 	var->sync		= 0;
584 
585 	return 0;
586 }
587 
588 
589 /*
590  * Set new x,y offsets in the virtual display for the visible area and switch
591  * to the new mode.
592  */
593 static int omapfb_pan_display(struct fb_var_screeninfo *var,
594 			       struct fb_info *fbi)
595 {
596 	struct omapfb_plane_struct *plane = fbi->par;
597 	struct omapfb_device *fbdev = plane->fbdev;
598 	int r = 0;
599 
600 	omapfb_rqueue_lock(fbdev);
601 	if (var->xoffset != fbi->var.xoffset ||
602 	    var->yoffset != fbi->var.yoffset) {
603 		struct fb_var_screeninfo *new_var = &fbdev->new_var;
604 
605 		memcpy(new_var, &fbi->var, sizeof(*new_var));
606 		new_var->xoffset = var->xoffset;
607 		new_var->yoffset = var->yoffset;
608 		if (set_fb_var(fbi, new_var))
609 			r = -EINVAL;
610 		else {
611 			memcpy(&fbi->var, new_var, sizeof(*new_var));
612 			ctrl_change_mode(fbi);
613 		}
614 	}
615 	omapfb_rqueue_unlock(fbdev);
616 
617 	return r;
618 }
619 
620 /* Set mirror to vertical axis and switch to the new mode. */
621 static int omapfb_mirror(struct fb_info *fbi, int mirror)
622 {
623 	struct omapfb_plane_struct *plane = fbi->par;
624 	struct omapfb_device *fbdev = plane->fbdev;
625 	int r = 0;
626 
627 	omapfb_rqueue_lock(fbdev);
628 	mirror = mirror ? 1 : 0;
629 	if (cpu_is_omap15xx())
630 		r = -EINVAL;
631 	else if (mirror != plane->info.mirror) {
632 		plane->info.mirror = mirror;
633 		r = ctrl_change_mode(fbi);
634 	}
635 	omapfb_rqueue_unlock(fbdev);
636 
637 	return r;
638 }
639 
640 /*
641  * Check values in var, try to adjust them in case of out of bound values if
642  * possible, or return error.
643  */
644 static int omapfb_check_var(struct fb_var_screeninfo *var, struct fb_info *fbi)
645 {
646 	struct omapfb_plane_struct *plane = fbi->par;
647 	struct omapfb_device *fbdev = plane->fbdev;
648 	int r;
649 
650 	omapfb_rqueue_lock(fbdev);
651 	if (fbdev->ctrl->sync != NULL)
652 		fbdev->ctrl->sync();
653 	r = set_fb_var(fbi, var);
654 	omapfb_rqueue_unlock(fbdev);
655 
656 	return r;
657 }
658 
659 /*
660  * Switch to a new mode. The parameters for it has been check already by
661  * omapfb_check_var.
662  */
663 static int omapfb_set_par(struct fb_info *fbi)
664 {
665 	struct omapfb_plane_struct *plane = fbi->par;
666 	struct omapfb_device *fbdev = plane->fbdev;
667 	int r = 0;
668 
669 	omapfb_rqueue_lock(fbdev);
670 	set_fb_fix(fbi, 0);
671 	r = ctrl_change_mode(fbi);
672 	omapfb_rqueue_unlock(fbdev);
673 
674 	return r;
675 }
676 
677 static int omapfb_update_window_async(struct fb_info *fbi,
678 				struct omapfb_update_window *win,
679 				void (*callback)(void *),
680 				void *callback_data)
681 {
682 	int xres, yres;
683 	struct omapfb_plane_struct *plane = fbi->par;
684 	struct omapfb_device *fbdev = plane->fbdev;
685 	struct fb_var_screeninfo *var = &fbi->var;
686 
687 	switch (var->rotate) {
688 	case 0:
689 	case 180:
690 		xres = fbdev->panel->x_res;
691 		yres = fbdev->panel->y_res;
692 		break;
693 	case 90:
694 	case 270:
695 		xres = fbdev->panel->y_res;
696 		yres = fbdev->panel->x_res;
697 		break;
698 	default:
699 		return -EINVAL;
700 	}
701 
702 	if (win->x >= xres || win->y >= yres ||
703 	    win->out_x > xres || win->out_y > yres)
704 		return -EINVAL;
705 
706 	if (!fbdev->ctrl->update_window ||
707 	    fbdev->ctrl->get_update_mode() != OMAPFB_MANUAL_UPDATE)
708 		return -ENODEV;
709 
710 	if (win->x + win->width > xres)
711 		win->width = xres - win->x;
712 	if (win->y + win->height > yres)
713 		win->height = yres - win->y;
714 	if (win->out_x + win->out_width > xres)
715 		win->out_width = xres - win->out_x;
716 	if (win->out_y + win->out_height > yres)
717 		win->out_height = yres - win->out_y;
718 	if (!win->width || !win->height || !win->out_width || !win->out_height)
719 		return 0;
720 
721 	return fbdev->ctrl->update_window(fbi, win, callback, callback_data);
722 }
723 
724 static int omapfb_update_win(struct fb_info *fbi,
725 				struct omapfb_update_window *win)
726 {
727 	struct omapfb_plane_struct *plane = fbi->par;
728 	int ret;
729 
730 	omapfb_rqueue_lock(plane->fbdev);
731 	ret = omapfb_update_window_async(fbi, win, NULL, NULL);
732 	omapfb_rqueue_unlock(plane->fbdev);
733 
734 	return ret;
735 }
736 
737 static int omapfb_update_full_screen(struct fb_info *fbi)
738 {
739 	struct omapfb_plane_struct *plane = fbi->par;
740 	struct omapfb_device *fbdev = plane->fbdev;
741 	struct omapfb_update_window win;
742 	int r;
743 
744 	if (!fbdev->ctrl->update_window ||
745 	    fbdev->ctrl->get_update_mode() != OMAPFB_MANUAL_UPDATE)
746 		return -ENODEV;
747 
748 	win.x = 0;
749 	win.y = 0;
750 	win.width = fbi->var.xres;
751 	win.height = fbi->var.yres;
752 	win.out_x = 0;
753 	win.out_y = 0;
754 	win.out_width = fbi->var.xres;
755 	win.out_height = fbi->var.yres;
756 	win.format = 0;
757 
758 	omapfb_rqueue_lock(fbdev);
759 	r = fbdev->ctrl->update_window(fbi, &win, NULL, NULL);
760 	omapfb_rqueue_unlock(fbdev);
761 
762 	return r;
763 }
764 
765 static int omapfb_setup_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
766 {
767 	struct omapfb_plane_struct *plane = fbi->par;
768 	struct omapfb_device *fbdev = plane->fbdev;
769 	struct lcd_panel *panel = fbdev->panel;
770 	struct omapfb_plane_info old_info;
771 	int r = 0;
772 
773 	if (pi->pos_x + pi->out_width > panel->x_res ||
774 	    pi->pos_y + pi->out_height > panel->y_res)
775 		return -EINVAL;
776 
777 	omapfb_rqueue_lock(fbdev);
778 	if (pi->enabled && !fbdev->mem_desc.region[plane->idx].size) {
779 		/*
780 		 * This plane's memory was freed, can't enable it
781 		 * until it's reallocated.
782 		 */
783 		r = -EINVAL;
784 		goto out;
785 	}
786 	old_info = plane->info;
787 	plane->info = *pi;
788 	if (pi->enabled) {
789 		r = ctrl_change_mode(fbi);
790 		if (r < 0) {
791 			plane->info = old_info;
792 			goto out;
793 		}
794 	}
795 	r = fbdev->ctrl->enable_plane(plane->idx, pi->enabled);
796 	if (r < 0) {
797 		plane->info = old_info;
798 		goto out;
799 	}
800 out:
801 	omapfb_rqueue_unlock(fbdev);
802 	return r;
803 }
804 
805 static int omapfb_query_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
806 {
807 	struct omapfb_plane_struct *plane = fbi->par;
808 
809 	*pi = plane->info;
810 	return 0;
811 }
812 
813 static int omapfb_setup_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
814 {
815 	struct omapfb_plane_struct *plane = fbi->par;
816 	struct omapfb_device *fbdev = plane->fbdev;
817 	struct omapfb_mem_region *rg = &fbdev->mem_desc.region[plane->idx];
818 	size_t size;
819 	int r = 0;
820 
821 	if (fbdev->ctrl->setup_mem == NULL)
822 		return -ENODEV;
823 	if (mi->type != OMAPFB_MEMTYPE_SDRAM)
824 		return -EINVAL;
825 
826 	size = PAGE_ALIGN(mi->size);
827 	omapfb_rqueue_lock(fbdev);
828 	if (plane->info.enabled) {
829 		r = -EBUSY;
830 		goto out;
831 	}
832 	if (rg->size != size || rg->type != mi->type) {
833 		struct fb_var_screeninfo *new_var = &fbdev->new_var;
834 		unsigned long old_size = rg->size;
835 		u8	      old_type = rg->type;
836 		unsigned long paddr;
837 
838 		rg->size = size;
839 		rg->type = mi->type;
840 		/*
841 		 * size == 0 is a special case, for which we
842 		 * don't check / adjust the screen parameters.
843 		 * This isn't a problem since the plane can't
844 		 * be reenabled unless its size is > 0.
845 		 */
846 		if (old_size != size && size) {
847 			if (size) {
848 				memcpy(new_var, &fbi->var, sizeof(*new_var));
849 				r = set_fb_var(fbi, new_var);
850 				if (r < 0)
851 					goto out;
852 			}
853 		}
854 
855 		if (fbdev->ctrl->sync)
856 			fbdev->ctrl->sync();
857 		r = fbdev->ctrl->setup_mem(plane->idx, size, mi->type, &paddr);
858 		if (r < 0) {
859 			/* Revert changes. */
860 			rg->size = old_size;
861 			rg->type = old_type;
862 			goto out;
863 		}
864 		rg->paddr = paddr;
865 
866 		if (old_size != size) {
867 			if (size) {
868 				memcpy(&fbi->var, new_var, sizeof(fbi->var));
869 				set_fb_fix(fbi, 0);
870 			} else {
871 				/*
872 				 * Set these explicitly to indicate that the
873 				 * plane memory is dealloce'd, the other
874 				 * screen parameters in var / fix are invalid.
875 				 */
876 				mutex_lock(&fbi->mm_lock);
877 				fbi->fix.smem_start = 0;
878 				fbi->fix.smem_len = 0;
879 				mutex_unlock(&fbi->mm_lock);
880 			}
881 		}
882 	}
883 out:
884 	omapfb_rqueue_unlock(fbdev);
885 
886 	return r;
887 }
888 
889 static int omapfb_query_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
890 {
891 	struct omapfb_plane_struct *plane = fbi->par;
892 	struct omapfb_device *fbdev = plane->fbdev;
893 	struct omapfb_mem_region *rg;
894 
895 	rg = &fbdev->mem_desc.region[plane->idx];
896 	memset(mi, 0, sizeof(*mi));
897 	mi->size = rg->size;
898 	mi->type = rg->type;
899 
900 	return 0;
901 }
902 
903 static int omapfb_set_color_key(struct omapfb_device *fbdev,
904 				struct omapfb_color_key *ck)
905 {
906 	int r;
907 
908 	if (!fbdev->ctrl->set_color_key)
909 		return -ENODEV;
910 
911 	omapfb_rqueue_lock(fbdev);
912 	r = fbdev->ctrl->set_color_key(ck);
913 	omapfb_rqueue_unlock(fbdev);
914 
915 	return r;
916 }
917 
918 static int omapfb_get_color_key(struct omapfb_device *fbdev,
919 				struct omapfb_color_key *ck)
920 {
921 	int r;
922 
923 	if (!fbdev->ctrl->get_color_key)
924 		return -ENODEV;
925 
926 	omapfb_rqueue_lock(fbdev);
927 	r = fbdev->ctrl->get_color_key(ck);
928 	omapfb_rqueue_unlock(fbdev);
929 
930 	return r;
931 }
932 
933 static struct blocking_notifier_head omapfb_client_list[OMAPFB_PLANE_NUM];
934 static int notifier_inited;
935 
936 static void omapfb_init_notifier(void)
937 {
938 	int i;
939 
940 	for (i = 0; i < OMAPFB_PLANE_NUM; i++)
941 		BLOCKING_INIT_NOTIFIER_HEAD(&omapfb_client_list[i]);
942 }
943 
944 int omapfb_register_client(struct omapfb_notifier_block *omapfb_nb,
945 				omapfb_notifier_callback_t callback,
946 				void *callback_data)
947 {
948 	int r;
949 
950 	if ((unsigned)omapfb_nb->plane_idx >= OMAPFB_PLANE_NUM)
951 		return -EINVAL;
952 
953 	if (!notifier_inited) {
954 		omapfb_init_notifier();
955 		notifier_inited = 1;
956 	}
957 
958 	omapfb_nb->nb.notifier_call = (int (*)(struct notifier_block *,
959 					unsigned long, void *))callback;
960 	omapfb_nb->data = callback_data;
961 	r = blocking_notifier_chain_register(
962 				&omapfb_client_list[omapfb_nb->plane_idx],
963 				&omapfb_nb->nb);
964 	if (r)
965 		return r;
966 	if (omapfb_dev != NULL &&
967 	    omapfb_dev->ctrl && omapfb_dev->ctrl->bind_client) {
968 		omapfb_dev->ctrl->bind_client(omapfb_nb);
969 	}
970 
971 	return 0;
972 }
973 EXPORT_SYMBOL(omapfb_register_client);
974 
975 int omapfb_unregister_client(struct omapfb_notifier_block *omapfb_nb)
976 {
977 	return blocking_notifier_chain_unregister(
978 		&omapfb_client_list[omapfb_nb->plane_idx], &omapfb_nb->nb);
979 }
980 EXPORT_SYMBOL(omapfb_unregister_client);
981 
982 void omapfb_notify_clients(struct omapfb_device *fbdev, unsigned long event)
983 {
984 	int i;
985 
986 	if (!notifier_inited)
987 		/* no client registered yet */
988 		return;
989 
990 	for (i = 0; i < OMAPFB_PLANE_NUM; i++)
991 		blocking_notifier_call_chain(&omapfb_client_list[i], event,
992 				    fbdev->fb_info[i]);
993 }
994 EXPORT_SYMBOL(omapfb_notify_clients);
995 
996 static int omapfb_set_update_mode(struct omapfb_device *fbdev,
997 				   enum omapfb_update_mode mode)
998 {
999 	int r;
1000 
1001 	omapfb_rqueue_lock(fbdev);
1002 	r = fbdev->ctrl->set_update_mode(mode);
1003 	omapfb_rqueue_unlock(fbdev);
1004 
1005 	return r;
1006 }
1007 
1008 static enum omapfb_update_mode omapfb_get_update_mode(struct omapfb_device *fbdev)
1009 {
1010 	int r;
1011 
1012 	omapfb_rqueue_lock(fbdev);
1013 	r = fbdev->ctrl->get_update_mode();
1014 	omapfb_rqueue_unlock(fbdev);
1015 
1016 	return r;
1017 }
1018 
1019 static void omapfb_get_caps(struct omapfb_device *fbdev, int plane,
1020 				     struct omapfb_caps *caps)
1021 {
1022 	memset(caps, 0, sizeof(*caps));
1023 	fbdev->ctrl->get_caps(plane, caps);
1024 	if (fbdev->panel->get_caps)
1025 		caps->ctrl |= fbdev->panel->get_caps(fbdev->panel);
1026 }
1027 
1028 /* For lcd testing */
1029 void omapfb_write_first_pixel(struct omapfb_device *fbdev, u16 pixval)
1030 {
1031 	omapfb_rqueue_lock(fbdev);
1032 	*(u16 *)fbdev->mem_desc.region[0].vaddr = pixval;
1033 	if (fbdev->ctrl->get_update_mode() == OMAPFB_MANUAL_UPDATE) {
1034 		struct omapfb_update_window win;
1035 
1036 		memset(&win, 0, sizeof(win));
1037 		win.width = 2;
1038 		win.height = 2;
1039 		win.out_width = 2;
1040 		win.out_height = 2;
1041 		fbdev->ctrl->update_window(fbdev->fb_info[0], &win, NULL, NULL);
1042 	}
1043 	omapfb_rqueue_unlock(fbdev);
1044 }
1045 EXPORT_SYMBOL(omapfb_write_first_pixel);
1046 
1047 /*
1048  * Ioctl interface. Part of the kernel mode frame buffer API is duplicated
1049  * here to be accessible by user mode code.
1050  */
1051 static int omapfb_ioctl(struct fb_info *fbi, unsigned int cmd,
1052 			unsigned long arg)
1053 {
1054 	struct omapfb_plane_struct *plane = fbi->par;
1055 	struct omapfb_device	*fbdev = plane->fbdev;
1056 	const struct fb_ops *ops = fbi->fbops;
1057 	union {
1058 		struct omapfb_update_window	update_window;
1059 		struct omapfb_plane_info	plane_info;
1060 		struct omapfb_mem_info		mem_info;
1061 		struct omapfb_color_key		color_key;
1062 		enum omapfb_update_mode		update_mode;
1063 		struct omapfb_caps		caps;
1064 		unsigned int		mirror;
1065 		int			plane_out;
1066 		int			enable_plane;
1067 	} p;
1068 	int r = 0;
1069 
1070 	BUG_ON(!ops);
1071 	switch (cmd) {
1072 	case OMAPFB_MIRROR:
1073 		if (get_user(p.mirror, (int __user *)arg))
1074 			r = -EFAULT;
1075 		else
1076 			omapfb_mirror(fbi, p.mirror);
1077 		break;
1078 	case OMAPFB_SYNC_GFX:
1079 		omapfb_sync(fbi);
1080 		break;
1081 	case OMAPFB_VSYNC:
1082 		break;
1083 	case OMAPFB_SET_UPDATE_MODE:
1084 		if (get_user(p.update_mode, (int __user *)arg))
1085 			r = -EFAULT;
1086 		else
1087 			r = omapfb_set_update_mode(fbdev, p.update_mode);
1088 		break;
1089 	case OMAPFB_GET_UPDATE_MODE:
1090 		p.update_mode = omapfb_get_update_mode(fbdev);
1091 		if (put_user(p.update_mode,
1092 					(enum omapfb_update_mode __user *)arg))
1093 			r = -EFAULT;
1094 		break;
1095 	case OMAPFB_UPDATE_WINDOW_OLD:
1096 		if (copy_from_user(&p.update_window, (void __user *)arg,
1097 				   sizeof(struct omapfb_update_window_old)))
1098 			r = -EFAULT;
1099 		else {
1100 			struct omapfb_update_window *u = &p.update_window;
1101 			u->out_x = u->x;
1102 			u->out_y = u->y;
1103 			u->out_width = u->width;
1104 			u->out_height = u->height;
1105 			memset(u->reserved, 0, sizeof(u->reserved));
1106 			r = omapfb_update_win(fbi, u);
1107 		}
1108 		break;
1109 	case OMAPFB_UPDATE_WINDOW:
1110 		if (copy_from_user(&p.update_window, (void __user *)arg,
1111 				   sizeof(p.update_window)))
1112 			r = -EFAULT;
1113 		else
1114 			r = omapfb_update_win(fbi, &p.update_window);
1115 		break;
1116 	case OMAPFB_SETUP_PLANE:
1117 		if (copy_from_user(&p.plane_info, (void __user *)arg,
1118 				   sizeof(p.plane_info)))
1119 			r = -EFAULT;
1120 		else
1121 			r = omapfb_setup_plane(fbi, &p.plane_info);
1122 		break;
1123 	case OMAPFB_QUERY_PLANE:
1124 		if ((r = omapfb_query_plane(fbi, &p.plane_info)) < 0)
1125 			break;
1126 		if (copy_to_user((void __user *)arg, &p.plane_info,
1127 				   sizeof(p.plane_info)))
1128 			r = -EFAULT;
1129 		break;
1130 	case OMAPFB_SETUP_MEM:
1131 		if (copy_from_user(&p.mem_info, (void __user *)arg,
1132 				   sizeof(p.mem_info)))
1133 			r = -EFAULT;
1134 		else
1135 			r = omapfb_setup_mem(fbi, &p.mem_info);
1136 		break;
1137 	case OMAPFB_QUERY_MEM:
1138 		if ((r = omapfb_query_mem(fbi, &p.mem_info)) < 0)
1139 			break;
1140 		if (copy_to_user((void __user *)arg, &p.mem_info,
1141 				   sizeof(p.mem_info)))
1142 			r = -EFAULT;
1143 		break;
1144 	case OMAPFB_SET_COLOR_KEY:
1145 		if (copy_from_user(&p.color_key, (void __user *)arg,
1146 				   sizeof(p.color_key)))
1147 			r = -EFAULT;
1148 		else
1149 			r = omapfb_set_color_key(fbdev, &p.color_key);
1150 		break;
1151 	case OMAPFB_GET_COLOR_KEY:
1152 		if ((r = omapfb_get_color_key(fbdev, &p.color_key)) < 0)
1153 			break;
1154 		if (copy_to_user((void __user *)arg, &p.color_key,
1155 				 sizeof(p.color_key)))
1156 			r = -EFAULT;
1157 		break;
1158 	case OMAPFB_GET_CAPS:
1159 		omapfb_get_caps(fbdev, plane->idx, &p.caps);
1160 		if (copy_to_user((void __user *)arg, &p.caps, sizeof(p.caps)))
1161 			r = -EFAULT;
1162 		break;
1163 	case OMAPFB_LCD_TEST:
1164 		{
1165 			int test_num;
1166 
1167 			if (get_user(test_num, (int __user *)arg)) {
1168 				r = -EFAULT;
1169 				break;
1170 			}
1171 			if (!fbdev->panel->run_test) {
1172 				r = -EINVAL;
1173 				break;
1174 			}
1175 			r = fbdev->panel->run_test(fbdev->panel, test_num);
1176 			break;
1177 		}
1178 	case OMAPFB_CTRL_TEST:
1179 		{
1180 			int test_num;
1181 
1182 			if (get_user(test_num, (int __user *)arg)) {
1183 				r = -EFAULT;
1184 				break;
1185 			}
1186 			if (!fbdev->ctrl->run_test) {
1187 				r = -EINVAL;
1188 				break;
1189 			}
1190 			r = fbdev->ctrl->run_test(test_num);
1191 			break;
1192 		}
1193 	default:
1194 		r = -EINVAL;
1195 	}
1196 
1197 	return r;
1198 }
1199 
1200 static int omapfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
1201 {
1202 	struct omapfb_plane_struct *plane = info->par;
1203 	struct omapfb_device *fbdev = plane->fbdev;
1204 	int r;
1205 
1206 	omapfb_rqueue_lock(fbdev);
1207 	r = fbdev->ctrl->mmap(info, vma);
1208 	omapfb_rqueue_unlock(fbdev);
1209 
1210 	return r;
1211 }
1212 
1213 /*
1214  * Callback table for the frame buffer framework. Some of these pointers
1215  * will be changed according to the current setting of fb_info->accel_flags.
1216  */
1217 static struct fb_ops omapfb_ops = {
1218 	.owner		= THIS_MODULE,
1219 	FB_DEFAULT_IOMEM_OPS,
1220 	.fb_open        = omapfb_open,
1221 	.fb_release     = omapfb_release,
1222 	.fb_setcolreg	= omapfb_setcolreg,
1223 	.fb_setcmap	= omapfb_setcmap,
1224 	.fb_blank       = omapfb_blank,
1225 	.fb_ioctl	= omapfb_ioctl,
1226 	.fb_check_var	= omapfb_check_var,
1227 	.fb_set_par	= omapfb_set_par,
1228 	.fb_pan_display = omapfb_pan_display,
1229 };
1230 
1231 /*
1232  * ---------------------------------------------------------------------------
1233  * Sysfs interface
1234  * ---------------------------------------------------------------------------
1235  */
1236 /* omapfbX sysfs entries */
1237 static ssize_t omapfb_show_caps_num(struct device *dev,
1238 				    struct device_attribute *attr, char *buf)
1239 {
1240 	struct omapfb_device *fbdev = dev_get_drvdata(dev);
1241 	int plane;
1242 	size_t size;
1243 	struct omapfb_caps caps;
1244 
1245 	plane = 0;
1246 	size = 0;
1247 	while (size < PAGE_SIZE && plane < OMAPFB_PLANE_NUM) {
1248 		omapfb_get_caps(fbdev, plane, &caps);
1249 		size += scnprintf(&buf[size], PAGE_SIZE - size,
1250 			"plane#%d %#010x %#010x %#010x\n",
1251 			plane, caps.ctrl, caps.plane_color, caps.wnd_color);
1252 		plane++;
1253 	}
1254 	return size;
1255 }
1256 
1257 static ssize_t omapfb_show_caps_text(struct device *dev,
1258 				     struct device_attribute *attr, char *buf)
1259 {
1260 	struct omapfb_device *fbdev = dev_get_drvdata(dev);
1261 	int i;
1262 	struct omapfb_caps caps;
1263 	int plane;
1264 	size_t size;
1265 
1266 	plane = 0;
1267 	size = 0;
1268 	while (size < PAGE_SIZE && plane < OMAPFB_PLANE_NUM) {
1269 		omapfb_get_caps(fbdev, plane, &caps);
1270 		size += scnprintf(&buf[size], PAGE_SIZE - size,
1271 				 "plane#%d:\n", plane);
1272 		for (i = 0; i < ARRAY_SIZE(ctrl_caps) &&
1273 		     size < PAGE_SIZE; i++) {
1274 			if (ctrl_caps[i].flag & caps.ctrl)
1275 				size += scnprintf(&buf[size], PAGE_SIZE - size,
1276 					" %s\n", ctrl_caps[i].name);
1277 		}
1278 		size += scnprintf(&buf[size], PAGE_SIZE - size,
1279 				 " plane colors:\n");
1280 		for (i = 0; i < ARRAY_SIZE(color_caps) &&
1281 		     size < PAGE_SIZE; i++) {
1282 			if (color_caps[i].flag & caps.plane_color)
1283 				size += scnprintf(&buf[size], PAGE_SIZE - size,
1284 					"  %s\n", color_caps[i].name);
1285 		}
1286 		size += scnprintf(&buf[size], PAGE_SIZE - size,
1287 				 " window colors:\n");
1288 		for (i = 0; i < ARRAY_SIZE(color_caps) &&
1289 		     size < PAGE_SIZE; i++) {
1290 			if (color_caps[i].flag & caps.wnd_color)
1291 				size += scnprintf(&buf[size], PAGE_SIZE - size,
1292 					"  %s\n", color_caps[i].name);
1293 		}
1294 
1295 		plane++;
1296 	}
1297 	return size;
1298 }
1299 
1300 static DEVICE_ATTR(caps_num, 0444, omapfb_show_caps_num, NULL);
1301 static DEVICE_ATTR(caps_text, 0444, omapfb_show_caps_text, NULL);
1302 
1303 /* panel sysfs entries */
1304 static ssize_t omapfb_show_panel_name(struct device *dev,
1305 				      struct device_attribute *attr, char *buf)
1306 {
1307 	struct omapfb_device *fbdev = dev_get_drvdata(dev);
1308 
1309 	return sysfs_emit(buf, "%s\n", fbdev->panel->name);
1310 }
1311 
1312 static ssize_t omapfb_show_bklight_level(struct device *dev,
1313 					 struct device_attribute *attr,
1314 					 char *buf)
1315 {
1316 	struct omapfb_device *fbdev = dev_get_drvdata(dev);
1317 	int r;
1318 
1319 	if (fbdev->panel->get_bklight_level) {
1320 		r = sysfs_emit(buf, "%d\n",
1321 			       fbdev->panel->get_bklight_level(fbdev->panel));
1322 	} else
1323 		r = -ENODEV;
1324 	return r;
1325 }
1326 
1327 static ssize_t omapfb_store_bklight_level(struct device *dev,
1328 					  struct device_attribute *attr,
1329 					  const char *buf, size_t size)
1330 {
1331 	struct omapfb_device *fbdev = dev_get_drvdata(dev);
1332 	int r;
1333 
1334 	if (fbdev->panel->set_bklight_level) {
1335 		unsigned int level;
1336 
1337 		if (sscanf(buf, "%10d", &level) == 1) {
1338 			r = fbdev->panel->set_bklight_level(fbdev->panel,
1339 							    level);
1340 		} else
1341 			r = -EINVAL;
1342 	} else
1343 		r = -ENODEV;
1344 	return r ? r : size;
1345 }
1346 
1347 static ssize_t omapfb_show_bklight_max(struct device *dev,
1348 				       struct device_attribute *attr, char *buf)
1349 {
1350 	struct omapfb_device *fbdev = dev_get_drvdata(dev);
1351 	int r;
1352 
1353 	if (fbdev->panel->get_bklight_level) {
1354 		r = sysfs_emit(buf, "%d\n",
1355 			       fbdev->panel->get_bklight_max(fbdev->panel));
1356 	} else
1357 		r = -ENODEV;
1358 	return r;
1359 }
1360 
1361 static struct device_attribute dev_attr_panel_name =
1362 	__ATTR(name, 0444, omapfb_show_panel_name, NULL);
1363 static DEVICE_ATTR(backlight_level, 0664,
1364 		   omapfb_show_bklight_level, omapfb_store_bklight_level);
1365 static DEVICE_ATTR(backlight_max, 0444, omapfb_show_bklight_max, NULL);
1366 
1367 static struct attribute *panel_attrs[] = {
1368 	&dev_attr_panel_name.attr,
1369 	&dev_attr_backlight_level.attr,
1370 	&dev_attr_backlight_max.attr,
1371 	NULL,
1372 };
1373 
1374 static const struct attribute_group panel_attr_grp = {
1375 	.name  = "panel",
1376 	.attrs = panel_attrs,
1377 };
1378 
1379 /* ctrl sysfs entries */
1380 static ssize_t omapfb_show_ctrl_name(struct device *dev,
1381 				     struct device_attribute *attr, char *buf)
1382 {
1383 	struct omapfb_device *fbdev = dev_get_drvdata(dev);
1384 
1385 	return sysfs_emit(buf, "%s\n", fbdev->ctrl->name);
1386 }
1387 
1388 static struct device_attribute dev_attr_ctrl_name =
1389 	__ATTR(name, 0444, omapfb_show_ctrl_name, NULL);
1390 
1391 static struct attribute *ctrl_attrs[] = {
1392 	&dev_attr_ctrl_name.attr,
1393 	NULL,
1394 };
1395 
1396 static const struct attribute_group ctrl_attr_grp = {
1397 	.name  = "ctrl",
1398 	.attrs = ctrl_attrs,
1399 };
1400 
1401 static int omapfb_register_sysfs(struct omapfb_device *fbdev)
1402 {
1403 	int r;
1404 
1405 	if ((r = device_create_file(fbdev->dev, &dev_attr_caps_num)))
1406 		goto fail0;
1407 
1408 	if ((r = device_create_file(fbdev->dev, &dev_attr_caps_text)))
1409 		goto fail1;
1410 
1411 	if ((r = sysfs_create_group(&fbdev->dev->kobj, &panel_attr_grp)))
1412 		goto fail2;
1413 
1414 	if ((r = sysfs_create_group(&fbdev->dev->kobj, &ctrl_attr_grp)))
1415 		goto fail3;
1416 
1417 	return 0;
1418 fail3:
1419 	sysfs_remove_group(&fbdev->dev->kobj, &panel_attr_grp);
1420 fail2:
1421 	device_remove_file(fbdev->dev, &dev_attr_caps_text);
1422 fail1:
1423 	device_remove_file(fbdev->dev, &dev_attr_caps_num);
1424 fail0:
1425 	dev_err(fbdev->dev, "unable to register sysfs interface\n");
1426 	return r;
1427 }
1428 
1429 static void omapfb_unregister_sysfs(struct omapfb_device *fbdev)
1430 {
1431 	sysfs_remove_group(&fbdev->dev->kobj, &ctrl_attr_grp);
1432 	sysfs_remove_group(&fbdev->dev->kobj, &panel_attr_grp);
1433 	device_remove_file(fbdev->dev, &dev_attr_caps_num);
1434 	device_remove_file(fbdev->dev, &dev_attr_caps_text);
1435 }
1436 
1437 /*
1438  * ---------------------------------------------------------------------------
1439  * LDM callbacks
1440  * ---------------------------------------------------------------------------
1441  */
1442 /* Initialize system fb_info object and set the default video mode.
1443  * The frame buffer memory already allocated by lcddma_init
1444  */
1445 static int fbinfo_init(struct omapfb_device *fbdev, struct fb_info *info)
1446 {
1447 	struct fb_var_screeninfo	*var = &info->var;
1448 	struct fb_fix_screeninfo	*fix = &info->fix;
1449 	int				r = 0;
1450 
1451 	info->fbops = &omapfb_ops;
1452 
1453 	strscpy(fix->id, MODULE_NAME, sizeof(fix->id));
1454 
1455 	info->pseudo_palette = fbdev->pseudo_palette;
1456 
1457 	var->accel_flags  = def_accel ? FB_ACCELF_TEXT : 0;
1458 	var->xres = def_vxres;
1459 	var->yres = def_vyres;
1460 	var->xres_virtual = def_vxres;
1461 	var->yres_virtual = def_vyres;
1462 	var->rotate	  = def_rotate;
1463 	var->bits_per_pixel = fbdev->panel->bpp;
1464 
1465 	set_fb_var(info, var);
1466 	set_fb_fix(info, 1);
1467 
1468 	r = fb_alloc_cmap(&info->cmap, 16, 0);
1469 	if (r != 0)
1470 		dev_err(fbdev->dev, "unable to allocate color map memory\n");
1471 
1472 	return r;
1473 }
1474 
1475 /* Release the fb_info object */
1476 static void fbinfo_cleanup(struct omapfb_device *fbdev, struct fb_info *fbi)
1477 {
1478 	fb_dealloc_cmap(&fbi->cmap);
1479 }
1480 
1481 static void planes_cleanup(struct omapfb_device *fbdev)
1482 {
1483 	int i;
1484 
1485 	for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1486 		if (fbdev->fb_info[i] == NULL)
1487 			break;
1488 		fbinfo_cleanup(fbdev, fbdev->fb_info[i]);
1489 		framebuffer_release(fbdev->fb_info[i]);
1490 	}
1491 }
1492 
1493 static int planes_init(struct omapfb_device *fbdev)
1494 {
1495 	struct fb_info *fbi;
1496 	int i;
1497 	int r;
1498 
1499 	for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1500 		struct omapfb_plane_struct *plane;
1501 		fbi = framebuffer_alloc(sizeof(struct omapfb_plane_struct),
1502 					fbdev->dev);
1503 		if (fbi == NULL) {
1504 			planes_cleanup(fbdev);
1505 			return -ENOMEM;
1506 		}
1507 		plane = fbi->par;
1508 		plane->idx = i;
1509 		plane->fbdev = fbdev;
1510 		plane->info.mirror = def_mirror;
1511 		fbdev->fb_info[i] = fbi;
1512 
1513 		if ((r = fbinfo_init(fbdev, fbi)) < 0) {
1514 			framebuffer_release(fbi);
1515 			planes_cleanup(fbdev);
1516 			return r;
1517 		}
1518 		plane->info.out_width = fbi->var.xres;
1519 		plane->info.out_height = fbi->var.yres;
1520 	}
1521 	return 0;
1522 }
1523 
1524 /*
1525  * Free driver resources. Can be called to rollback an aborted initialization
1526  * sequence.
1527  */
1528 static void omapfb_free_resources(struct omapfb_device *fbdev, int state)
1529 {
1530 	int i;
1531 
1532 	switch (state) {
1533 	case OMAPFB_ACTIVE:
1534 		for (i = 0; i < fbdev->mem_desc.region_cnt; i++)
1535 			unregister_framebuffer(fbdev->fb_info[i]);
1536 		fallthrough;
1537 	case 7:
1538 		omapfb_unregister_sysfs(fbdev);
1539 		fallthrough;
1540 	case 6:
1541 		if (fbdev->panel->disable)
1542 			fbdev->panel->disable(fbdev->panel);
1543 		fallthrough;
1544 	case 5:
1545 		omapfb_set_update_mode(fbdev, OMAPFB_UPDATE_DISABLED);
1546 		fallthrough;
1547 	case 4:
1548 		planes_cleanup(fbdev);
1549 		fallthrough;
1550 	case 3:
1551 		ctrl_cleanup(fbdev);
1552 		fallthrough;
1553 	case 2:
1554 		if (fbdev->panel->cleanup)
1555 			fbdev->panel->cleanup(fbdev->panel);
1556 		fallthrough;
1557 	case 1:
1558 		dev_set_drvdata(fbdev->dev, NULL);
1559 		kfree(fbdev);
1560 		break;
1561 	case 0:
1562 		/* nothing to free */
1563 		break;
1564 	default:
1565 		BUG();
1566 	}
1567 }
1568 
1569 static int omapfb_find_ctrl(struct omapfb_device *fbdev)
1570 {
1571 	struct omapfb_platform_data *conf;
1572 	char name[17];
1573 	int i;
1574 
1575 	conf = dev_get_platdata(fbdev->dev);
1576 
1577 	fbdev->ctrl = NULL;
1578 
1579 	strscpy(name, conf->lcd.ctrl_name, sizeof(name));
1580 
1581 	if (strcmp(name, "internal") == 0) {
1582 		fbdev->ctrl = fbdev->int_ctrl;
1583 		return 0;
1584 	}
1585 
1586 	for (i = 0; i < ARRAY_SIZE(ctrls); i++) {
1587 		dev_dbg(fbdev->dev, "ctrl %s\n", ctrls[i]->name);
1588 		if (strcmp(ctrls[i]->name, name) == 0) {
1589 			fbdev->ctrl = ctrls[i];
1590 			break;
1591 		}
1592 	}
1593 
1594 	if (fbdev->ctrl == NULL) {
1595 		dev_dbg(fbdev->dev, "ctrl %s not supported\n", name);
1596 		return -1;
1597 	}
1598 
1599 	return 0;
1600 }
1601 
1602 /*
1603  * Called by LDM binding to probe and attach a new device.
1604  * Initialization sequence:
1605  *   1. allocate system omapfb_device structure
1606  *   2. select controller type according to platform configuration
1607  *      init LCD panel
1608  *   3. init LCD controller and LCD DMA
1609  *   4. init system fb_info structure for all planes
1610  *   5. setup video mode for first plane and enable it
1611  *   6. enable LCD panel
1612  *   7. register sysfs attributes
1613  *   OMAPFB_ACTIVE: register system fb_info structure for all planes
1614  */
1615 static int omapfb_do_probe(struct platform_device *pdev,
1616 				struct lcd_panel *panel)
1617 {
1618 	struct omapfb_device	*fbdev = NULL;
1619 	int			init_state;
1620 	unsigned long		phz, hhz, vhz;
1621 	unsigned long		vram;
1622 	int			i;
1623 	int			r = 0;
1624 
1625 	init_state = 0;
1626 
1627 	if (pdev->num_resources != 2) {
1628 		dev_err(&pdev->dev, "probed for an unknown device\n");
1629 		r = -ENODEV;
1630 		goto cleanup;
1631 	}
1632 
1633 	if (dev_get_platdata(&pdev->dev) == NULL) {
1634 		dev_err(&pdev->dev, "missing platform data\n");
1635 		r = -ENOENT;
1636 		goto cleanup;
1637 	}
1638 
1639 	fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
1640 	if (fbdev == NULL) {
1641 		dev_err(&pdev->dev,
1642 			"unable to allocate memory for device info\n");
1643 		r = -ENOMEM;
1644 		goto cleanup;
1645 	}
1646 	fbdev->int_irq = platform_get_irq(pdev, 0);
1647 	if (fbdev->int_irq < 0) {
1648 		r = -ENXIO;
1649 		goto cleanup;
1650 	}
1651 
1652 	fbdev->ext_irq = platform_get_irq(pdev, 1);
1653 	if (fbdev->ext_irq < 0) {
1654 		r = -ENXIO;
1655 		goto cleanup;
1656 	}
1657 
1658 	init_state++;
1659 
1660 	fbdev->dev = &pdev->dev;
1661 	fbdev->panel = panel;
1662 	fbdev->dssdev = &omapdss_device;
1663 	platform_set_drvdata(pdev, fbdev);
1664 
1665 	mutex_init(&fbdev->rqueue_mutex);
1666 
1667 	fbdev->int_ctrl = &omap1_int_ctrl;
1668 #ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL
1669 	fbdev->ext_if = &omap1_ext_if;
1670 #endif
1671 	if (omapfb_find_ctrl(fbdev) < 0) {
1672 		dev_err(fbdev->dev,
1673 			"LCD controller not found, board not supported\n");
1674 		r = -ENODEV;
1675 		goto cleanup;
1676 	}
1677 
1678 	if (fbdev->panel->init) {
1679 		r = fbdev->panel->init(fbdev->panel, fbdev);
1680 		if (r)
1681 			goto cleanup;
1682 	}
1683 
1684 	pr_info("omapfb: configured for panel %s\n", fbdev->panel->name);
1685 
1686 	def_vxres = def_vxres ? def_vxres : fbdev->panel->x_res;
1687 	def_vyres = def_vyres ? def_vyres : fbdev->panel->y_res;
1688 
1689 	init_state++;
1690 
1691 	r = ctrl_init(fbdev);
1692 	if (r)
1693 		goto cleanup;
1694 	if (fbdev->ctrl->mmap != NULL)
1695 		omapfb_ops.fb_mmap = omapfb_mmap;
1696 	init_state++;
1697 
1698 	r = planes_init(fbdev);
1699 	if (r)
1700 		goto cleanup;
1701 	init_state++;
1702 
1703 #ifdef CONFIG_FB_OMAP_DMA_TUNE
1704 	/* Set DMA priority for EMIFF access to highest */
1705 	omap_set_dma_priority(0, OMAP_DMA_PORT_EMIFF, 15);
1706 #endif
1707 
1708 	r = ctrl_change_mode(fbdev->fb_info[0]);
1709 	if (r) {
1710 		dev_err(fbdev->dev, "mode setting failed\n");
1711 		goto cleanup;
1712 	}
1713 
1714 	/* GFX plane is enabled by default */
1715 	r = fbdev->ctrl->enable_plane(OMAPFB_PLANE_GFX, 1);
1716 	if (r)
1717 		goto cleanup;
1718 
1719 	omapfb_set_update_mode(fbdev, manual_update ?
1720 				   OMAPFB_MANUAL_UPDATE : OMAPFB_AUTO_UPDATE);
1721 	init_state++;
1722 
1723 	if (fbdev->panel->enable) {
1724 		r = fbdev->panel->enable(fbdev->panel);
1725 		if (r)
1726 			goto cleanup;
1727 	}
1728 	init_state++;
1729 
1730 	r = omapfb_register_sysfs(fbdev);
1731 	if (r)
1732 		goto cleanup;
1733 	init_state++;
1734 
1735 	vram = 0;
1736 	for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1737 		r = register_framebuffer(fbdev->fb_info[i]);
1738 		if (r != 0) {
1739 			dev_err(fbdev->dev,
1740 				"registering framebuffer %d failed\n", i);
1741 			goto cleanup;
1742 		}
1743 		vram += fbdev->mem_desc.region[i].size;
1744 	}
1745 
1746 	fbdev->state = OMAPFB_ACTIVE;
1747 
1748 	panel = fbdev->panel;
1749 	phz = panel->pixel_clock * 1000;
1750 	hhz = phz * 10 / (panel->hfp + panel->x_res + panel->hbp + panel->hsw);
1751 	vhz = hhz / (panel->vfp + panel->y_res + panel->vbp + panel->vsw);
1752 
1753 	omapfb_dev = fbdev;
1754 
1755 	pr_info("omapfb: Framebuffer initialized. Total vram %lu planes %d\n",
1756 			vram, fbdev->mem_desc.region_cnt);
1757 	pr_info("omapfb: Pixclock %lu kHz hfreq %lu.%lu kHz "
1758 			"vfreq %lu.%lu Hz\n",
1759 			phz / 1000, hhz / 10000, hhz % 10, vhz / 10, vhz % 10);
1760 
1761 	return 0;
1762 
1763 cleanup:
1764 	omapfb_free_resources(fbdev, init_state);
1765 
1766 	return r;
1767 }
1768 
1769 static int omapfb_probe(struct platform_device *pdev)
1770 {
1771 	int r;
1772 
1773 	BUG_ON(fbdev_pdev != NULL);
1774 
1775 	r = platform_device_register(&omapdss_device);
1776 	if (r) {
1777 		dev_err(&pdev->dev, "can't register omapdss device\n");
1778 		return r;
1779 	}
1780 
1781 	/* Delay actual initialization until the LCD is registered */
1782 	fbdev_pdev = pdev;
1783 	if (fbdev_panel != NULL)
1784 		omapfb_do_probe(fbdev_pdev, fbdev_panel);
1785 	return 0;
1786 }
1787 
1788 void omapfb_register_panel(struct lcd_panel *panel)
1789 {
1790 	BUG_ON(fbdev_panel != NULL);
1791 
1792 	fbdev_panel = panel;
1793 	if (fbdev_pdev != NULL)
1794 		omapfb_do_probe(fbdev_pdev, fbdev_panel);
1795 }
1796 EXPORT_SYMBOL_GPL(omapfb_register_panel);
1797 
1798 /* Called when the device is being detached from the driver */
1799 static void omapfb_remove(struct platform_device *pdev)
1800 {
1801 	struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1802 	enum omapfb_state saved_state = fbdev->state;
1803 
1804 	/* FIXME: wait till completion of pending events */
1805 
1806 	fbdev->state = OMAPFB_DISABLED;
1807 	omapfb_free_resources(fbdev, saved_state);
1808 
1809 	platform_device_unregister(&omapdss_device);
1810 	fbdev->dssdev = NULL;
1811 }
1812 
1813 /* PM suspend */
1814 static int omapfb_suspend(struct platform_device *pdev, pm_message_t mesg)
1815 {
1816 	struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1817 
1818 	if (fbdev != NULL)
1819 		omapfb_blank(FB_BLANK_POWERDOWN, fbdev->fb_info[0]);
1820 	return 0;
1821 }
1822 
1823 /* PM resume */
1824 static int omapfb_resume(struct platform_device *pdev)
1825 {
1826 	struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1827 
1828 	if (fbdev != NULL)
1829 		omapfb_blank(FB_BLANK_UNBLANK, fbdev->fb_info[0]);
1830 	return 0;
1831 }
1832 
1833 static struct platform_driver omapfb_driver = {
1834 	.probe		= omapfb_probe,
1835 	.remove_new	= omapfb_remove,
1836 	.suspend	= omapfb_suspend,
1837 	.resume		= omapfb_resume,
1838 	.driver		= {
1839 		.name	= MODULE_NAME,
1840 	},
1841 };
1842 
1843 #ifndef MODULE
1844 
1845 /* Process kernel command line parameters */
1846 static int __init omapfb_setup(char *options)
1847 {
1848 	char *this_opt = NULL;
1849 	int r = 0;
1850 
1851 	pr_debug("omapfb: options %s\n", options);
1852 
1853 	if (!options || !*options)
1854 		return 0;
1855 
1856 	while (!r && (this_opt = strsep(&options, ",")) != NULL) {
1857 		if (!strncmp(this_opt, "accel", 5))
1858 			def_accel = 1;
1859 		else if (!strncmp(this_opt, "vram:", 5)) {
1860 			char *suffix;
1861 			unsigned long vram;
1862 			vram = (simple_strtoul(this_opt + 5, &suffix, 0));
1863 			switch (suffix[0]) {
1864 			case '\0':
1865 				break;
1866 			case 'm':
1867 			case 'M':
1868 				vram *= 1024;
1869 				fallthrough;
1870 			case 'k':
1871 			case 'K':
1872 				vram *= 1024;
1873 				break;
1874 			default:
1875 				pr_debug("omapfb: invalid vram suffix %c\n",
1876 					 suffix[0]);
1877 				r = -1;
1878 			}
1879 			def_vram[def_vram_cnt++] = vram;
1880 		}
1881 		else if (!strncmp(this_opt, "vxres:", 6))
1882 			def_vxres = simple_strtoul(this_opt + 6, NULL, 0);
1883 		else if (!strncmp(this_opt, "vyres:", 6))
1884 			def_vyres = simple_strtoul(this_opt + 6, NULL, 0);
1885 		else if (!strncmp(this_opt, "rotate:", 7))
1886 			def_rotate = (simple_strtoul(this_opt + 7, NULL, 0));
1887 		else if (!strncmp(this_opt, "mirror:", 7))
1888 			def_mirror = (simple_strtoul(this_opt + 7, NULL, 0));
1889 		else if (!strncmp(this_opt, "manual_update", 13))
1890 			manual_update = 1;
1891 		else {
1892 			pr_debug("omapfb: invalid option\n");
1893 			r = -1;
1894 		}
1895 	}
1896 
1897 	return r;
1898 }
1899 
1900 #endif
1901 
1902 /* Register both the driver and the device */
1903 static int __init omapfb_init(void)
1904 {
1905 #ifndef MODULE
1906 	char *option;
1907 
1908 	if (fb_get_options("omapfb", &option))
1909 		return -ENODEV;
1910 	omapfb_setup(option);
1911 #endif
1912 	/* Register the driver with LDM */
1913 	if (platform_driver_register(&omapfb_driver)) {
1914 		pr_debug("failed to register omapfb driver\n");
1915 		return -ENODEV;
1916 	}
1917 
1918 	return 0;
1919 }
1920 
1921 static void __exit omapfb_cleanup(void)
1922 {
1923 	platform_driver_unregister(&omapfb_driver);
1924 }
1925 
1926 module_param_named(accel, def_accel, uint, 0664);
1927 module_param_array_named(vram, def_vram, ulong, &def_vram_cnt, 0664);
1928 module_param_named(vxres, def_vxres, long, 0664);
1929 module_param_named(vyres, def_vyres, long, 0664);
1930 module_param_named(rotate, def_rotate, uint, 0664);
1931 module_param_named(mirror, def_mirror, uint, 0664);
1932 module_param_named(manual_update, manual_update, bool, 0664);
1933 
1934 module_init(omapfb_init);
1935 module_exit(omapfb_cleanup);
1936 
1937 MODULE_DESCRIPTION("TI OMAP framebuffer driver");
1938 MODULE_AUTHOR("Imre Deak <imre.deak@nokia.com>");
1939 MODULE_LICENSE("GPL");
1940