omapfb_main.c

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