drivers/video/fbdev/omap2/omapfb/omapfb-main.c

   1 /*
   2  * linux/drivers/video/omap2/omapfb-main.c
   3  *
   4  * Copyright (C) 2008 Nokia Corporation
   5  * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
   6  *
   7  * Some code and ideas taken from drivers/video/omap/ driver
   8  * by Imre Deak.
   9  *
  10  * This program is free software; you can redistribute it and/or modify it
  11  * under the terms of the GNU General Public License version 2 as published by
  12  * the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but WITHOUT
  15  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  17  * more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along with
  20  * this program.  If not, see <http://www.gnu.org/licenses/>.
  21  */
  22
  23 #include <linux/module.h>
  24 #include <linux/delay.h>
  25 #include <linux/slab.h>
  26 #include <linux/fb.h>
  27 #include <linux/dma-mapping.h>
  28 #include <linux/vmalloc.h>
  29 #include <linux/device.h>
  30 #include <linux/platform_device.h>
  31 #include <linux/omapfb.h>
  32
  33 #include <video/omapfb_dss.h>
  34 #include <video/omapvrfb.h>
  35
  36 #include "omapfb.h"
  37
  38 #define MODULE_NAME     "omapfb"
  39
  40 #define OMAPFB_PLANE_XRES_MIN           8
  41 #define OMAPFB_PLANE_YRES_MIN           8
  42
  43 static char *def_mode;
  44 static char *def_vram;
  45 static bool def_vrfb;
  46 static int def_rotate;
  47 static bool def_mirror;
  48 static bool auto_update;
  49 static unsigned int auto_update_freq;
  50 module_param(auto_update, bool, 0);
  51 module_param(auto_update_freq, uint, 0644);
  52
  53 #ifdef DEBUG
  54 bool omapfb_debug;
  55 module_param_named(debug, omapfb_debug, bool, 0644);
  56 static bool omapfb_test_pattern;
  57 module_param_named(test, omapfb_test_pattern, bool, 0644);
  58 #endif
  59
  60 static int omapfb_fb_init(struct omapfb2_device *fbdev, struct fb_info *fbi);
  61 static int omapfb_get_recommended_bpp(struct omapfb2_device *fbdev,
  62                 struct omap_dss_device *dssdev);
  63
  64 #ifdef DEBUG
  65 static void draw_pixel(struct fb_info *fbi, int x, int y, unsigned color)
  66 {
  67         struct fb_var_screeninfo *var = &fbi->var;
  68         struct fb_fix_screeninfo *fix = &fbi->fix;
  69         void __iomem *addr = fbi->screen_base;
  70         const unsigned bytespp = var->bits_per_pixel >> 3;
  71         const unsigned line_len = fix->line_length / bytespp;
  72
  73         int r = (color >> 16) & 0xff;
  74         int g = (color >> 8) & 0xff;
  75         int b = (color >> 0) & 0xff;
  76
  77         if (var->bits_per_pixel == 16) {
  78                 u16 __iomem *p = (u16 __iomem *)addr;
  79                 p += y * line_len + x;
  80
  81                 r = r * 32 / 256;
  82                 g = g * 64 / 256;
  83                 b = b * 32 / 256;
  84
  85                 __raw_writew((r << 11) | (g << 5) | (b << 0), p);
  86         } else if (var->bits_per_pixel == 24) {
  87                 u8 __iomem *p = (u8 __iomem *)addr;
  88                 p += (y * line_len + x) * 3;
  89
  90                 __raw_writeb(b, p + 0);
  91                 __raw_writeb(g, p + 1);
  92                 __raw_writeb(r, p + 2);
  93         } else if (var->bits_per_pixel == 32) {
  94                 u32 __iomem *p = (u32 __iomem *)addr;
  95                 p += y * line_len + x;
  96                 __raw_writel(color, p);
  97         }
  98 }
  99
 100 static void fill_fb(struct fb_info *fbi)
 101 {
 102         struct fb_var_screeninfo *var = &fbi->var;
 103         const short w = var->xres_virtual;
 104         const short h = var->yres_virtual;
 105         void __iomem *addr = fbi->screen_base;
 106         int y, x;
 107
 108         if (!addr)
 109                 return;
 110
 111         DBG("fill_fb %dx%d, line_len %d bytes\n", w, h, fbi->fix.line_length);
 112
 113         for (y = 0; y < h; y++) {
 114                 for (x = 0; x < w; x++) {
 115                         if (x < 20 && y < 20)
 116                                 draw_pixel(fbi, x, y, 0xffffff);
 117                         else if (x < 20 && (y > 20 && y < h - 20))
 118                                 draw_pixel(fbi, x, y, 0xff);
 119                         else if (y < 20 && (x > 20 && x < w - 20))
 120                                 draw_pixel(fbi, x, y, 0xff00);
 121                         else if (x > w - 20 && (y > 20 && y < h - 20))
 122                                 draw_pixel(fbi, x, y, 0xff0000);
 123                         else if (y > h - 20 && (x > 20 && x < w - 20))
 124                                 draw_pixel(fbi, x, y, 0xffff00);
 125                         else if (x == 20 || x == w - 20 ||
 126                                         y == 20 || y == h - 20)
 127                                 draw_pixel(fbi, x, y, 0xffffff);
 128                         else if (x == y || w - x == h - y)
 129                                 draw_pixel(fbi, x, y, 0xff00ff);
 130                         else if (w - x == y || x == h - y)
 131                                 draw_pixel(fbi, x, y, 0x00ffff);
 132                         else if (x > 20 && y > 20 && x < w - 20 && y < h - 20) {
 133                                 int t = x * 3 / w;
 134                                 unsigned r = 0, g = 0, b = 0;
 135                                 unsigned c;
 136                                 if (var->bits_per_pixel == 16) {
 137                                         if (t == 0)
 138                                                 b = (y % 32) * 256 / 32;
 139                                         else if (t == 1)
 140                                                 g = (y % 64) * 256 / 64;
 141                                         else if (t == 2)
 142                                                 r = (y % 32) * 256 / 32;
 143                                 } else {
 144                                         if (t == 0)
 145                                                 b = (y % 256);
 146                                         else if (t == 1)
 147                                                 g = (y % 256);
 148                                         else if (t == 2)
 149                                                 r = (y % 256);
 150                                 }
 151                                 c = (r << 16) | (g << 8) | (b << 0);
 152                                 draw_pixel(fbi, x, y, c);
 153                         } else {
 154                                 draw_pixel(fbi, x, y, 0);
 155                         }
 156                 }
 157         }
 158 }
 159 #endif
 160
 161 static unsigned omapfb_get_vrfb_offset(const struct omapfb_info *ofbi, int rot)
 162 {
 163         const struct vrfb *vrfb = &ofbi->region->vrfb;
 164         unsigned offset;
 165
 166         switch (rot) {
 167         case FB_ROTATE_UR:
 168                 offset = 0;
 169                 break;
 170         case FB_ROTATE_CW:
 171                 offset = vrfb->yoffset;
 172                 break;
 173         case FB_ROTATE_UD:
 174                 offset = vrfb->yoffset * OMAP_VRFB_LINE_LEN + vrfb->xoffset;
 175                 break;
 176         case FB_ROTATE_CCW:
 177                 offset = vrfb->xoffset * OMAP_VRFB_LINE_LEN;
 178                 break;
 179         default:
 180                 BUG();
 181                 return 0;
 182         }
 183
 184         offset *= vrfb->bytespp;
 185
 186         return offset;
 187 }
 188
 189 static u32 omapfb_get_region_rot_paddr(const struct omapfb_info *ofbi, int rot)
 190 {
 191         if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
 192                 return ofbi->region->vrfb.paddr[rot]
 193                         + omapfb_get_vrfb_offset(ofbi, rot);
 194         } else {
 195                 return ofbi->region->paddr;
 196         }
 197 }
 198
 199 static u32 omapfb_get_region_paddr(const struct omapfb_info *ofbi)
 200 {
 201         if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB)
 202                 return ofbi->region->vrfb.paddr[0];
 203         else
 204                 return ofbi->region->paddr;
 205 }
 206
 207 static void __iomem *omapfb_get_region_vaddr(const struct omapfb_info *ofbi)
 208 {
 209         if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB)
 210                 return ofbi->region->vrfb.vaddr[0];
 211         else
 212                 return ofbi->region->vaddr;
 213 }
 214
 215 static struct omapfb_colormode omapfb_colormodes[] = {
 216         {
 217                 .dssmode = OMAP_DSS_COLOR_UYVY,
 218                 .bits_per_pixel = 16,
 219                 .nonstd = OMAPFB_COLOR_YUV422,
 220         }, {
 221                 .dssmode = OMAP_DSS_COLOR_YUV2,
 222                 .bits_per_pixel = 16,
 223                 .nonstd = OMAPFB_COLOR_YUY422,
 224         }, {
 225                 .dssmode = OMAP_DSS_COLOR_ARGB16,
 226                 .bits_per_pixel = 16,
 227                 .red    = { .length = 4, .offset = 8, .msb_right = 0 },
 228                 .green  = { .length = 4, .offset = 4, .msb_right = 0 },
 229                 .blue   = { .length = 4, .offset = 0, .msb_right = 0 },
 230                 .transp = { .length = 4, .offset = 12, .msb_right = 0 },
 231         }, {
 232                 .dssmode = OMAP_DSS_COLOR_RGB16,
 233                 .bits_per_pixel = 16,
 234                 .red    = { .length = 5, .offset = 11, .msb_right = 0 },
 235                 .green  = { .length = 6, .offset = 5, .msb_right = 0 },
 236                 .blue   = { .length = 5, .offset = 0, .msb_right = 0 },
 237                 .transp = { .length = 0, .offset = 0, .msb_right = 0 },
 238         }, {
 239                 .dssmode = OMAP_DSS_COLOR_RGB24P,
 240                 .bits_per_pixel = 24,
 241                 .red    = { .length = 8, .offset = 16, .msb_right = 0 },
 242                 .green  = { .length = 8, .offset = 8, .msb_right = 0 },
 243                 .blue   = { .length = 8, .offset = 0, .msb_right = 0 },
 244                 .transp = { .length = 0, .offset = 0, .msb_right = 0 },
 245         }, {
 246                 .dssmode = OMAP_DSS_COLOR_RGB24U,
 247                 .bits_per_pixel = 32,
 248                 .red    = { .length = 8, .offset = 16, .msb_right = 0 },
 249                 .green  = { .length = 8, .offset = 8, .msb_right = 0 },
 250                 .blue   = { .length = 8, .offset = 0, .msb_right = 0 },
 251                 .transp = { .length = 0, .offset = 0, .msb_right = 0 },
 252         }, {
 253                 .dssmode = OMAP_DSS_COLOR_ARGB32,
 254                 .bits_per_pixel = 32,
 255                 .red    = { .length = 8, .offset = 16, .msb_right = 0 },
 256                 .green  = { .length = 8, .offset = 8, .msb_right = 0 },
 257                 .blue   = { .length = 8, .offset = 0, .msb_right = 0 },
 258                 .transp = { .length = 8, .offset = 24, .msb_right = 0 },
 259         }, {
 260                 .dssmode = OMAP_DSS_COLOR_RGBA32,
 261                 .bits_per_pixel = 32,
 262                 .red    = { .length = 8, .offset = 24, .msb_right = 0 },
 263                 .green  = { .length = 8, .offset = 16, .msb_right = 0 },
 264                 .blue   = { .length = 8, .offset = 8, .msb_right = 0 },
 265                 .transp = { .length = 8, .offset = 0, .msb_right = 0 },
 266         }, {
 267                 .dssmode = OMAP_DSS_COLOR_RGBX32,
 268                 .bits_per_pixel = 32,
 269                 .red    = { .length = 8, .offset = 24, .msb_right = 0 },
 270                 .green  = { .length = 8, .offset = 16, .msb_right = 0 },
 271                 .blue   = { .length = 8, .offset = 8, .msb_right = 0 },
 272                 .transp = { .length = 0, .offset = 0, .msb_right = 0 },
 273         },
 274 };
 275
 276 static bool cmp_component(struct fb_bitfield *f1, struct fb_bitfield *f2)
 277 {
 278         return f1->length == f2->length &&
 279                 f1->offset == f2->offset &&
 280                 f1->msb_right == f2->msb_right;
 281 }
 282
 283 static bool cmp_var_to_colormode(struct fb_var_screeninfo *var,
 284                 struct omapfb_colormode *color)
 285 {
 286         if (var->bits_per_pixel == 0 ||
 287                         var->red.length == 0 ||
 288                         var->blue.length == 0 ||
 289                         var->green.length == 0)
 290                 return false;
 291
 292         return var->bits_per_pixel == color->bits_per_pixel &&
 293                 cmp_component(&var->red, &color->red) &&
 294                 cmp_component(&var->green, &color->green) &&
 295                 cmp_component(&var->blue, &color->blue) &&
 296                 cmp_component(&var->transp, &color->transp);
 297 }
 298
 299 static void assign_colormode_to_var(struct fb_var_screeninfo *var,
 300                 struct omapfb_colormode *color)
 301 {
 302         var->bits_per_pixel = color->bits_per_pixel;
 303         var->nonstd = color->nonstd;
 304         var->red = color->red;
 305         var->green = color->green;
 306         var->blue = color->blue;
 307         var->transp = color->transp;
 308 }
 309
 310 static int fb_mode_to_dss_mode(struct fb_var_screeninfo *var,
 311                 enum omap_color_mode *mode)
 312 {
 313         enum omap_color_mode dssmode;
 314         int i;
 315
 316         /* first match with nonstd field */
 317         if (var->nonstd) {
 318                 for (i = 0; i < ARRAY_SIZE(omapfb_colormodes); ++i) {
 319                         struct omapfb_colormode *m = &omapfb_colormodes[i];
 320                         if (var->nonstd == m->nonstd) {
 321                                 assign_colormode_to_var(var, m);
 322                                 *mode = m->dssmode;
 323                                 return 0;
 324                         }
 325                 }
 326
 327                 return -EINVAL;
 328         }
 329
 330         /* then try exact match of bpp and colors */
 331         for (i = 0; i < ARRAY_SIZE(omapfb_colormodes); ++i) {
 332                 struct omapfb_colormode *m = &omapfb_colormodes[i];
 333                 if (cmp_var_to_colormode(var, m)) {
 334                         assign_colormode_to_var(var, m);
 335                         *mode = m->dssmode;
 336                         return 0;
 337                 }
 338         }
 339
 340         /* match with bpp if user has not filled color fields
 341          * properly */
 342         switch (var->bits_per_pixel) {
 343         case 1:
 344                 dssmode = OMAP_DSS_COLOR_CLUT1;
 345                 break;
 346         case 2:
 347                 dssmode = OMAP_DSS_COLOR_CLUT2;
 348                 break;
 349         case 4:
 350                 dssmode = OMAP_DSS_COLOR_CLUT4;
 351                 break;
 352         case 8:
 353                 dssmode = OMAP_DSS_COLOR_CLUT8;
 354                 break;
 355         case 12:
 356                 dssmode = OMAP_DSS_COLOR_RGB12U;
 357                 break;
 358         case 16:
 359                 dssmode = OMAP_DSS_COLOR_RGB16;
 360                 break;
 361         case 24:
 362                 dssmode = OMAP_DSS_COLOR_RGB24P;
 363                 break;
 364         case 32:
 365                 dssmode = OMAP_DSS_COLOR_RGB24U;
 366                 break;
 367         default:
 368                 return -EINVAL;
 369         }
 370
 371         for (i = 0; i < ARRAY_SIZE(omapfb_colormodes); ++i) {
 372                 struct omapfb_colormode *m = &omapfb_colormodes[i];
 373                 if (dssmode == m->dssmode) {
 374                         assign_colormode_to_var(var, m);
 375                         *mode = m->dssmode;
 376                         return 0;
 377                 }
 378         }
 379
 380         return -EINVAL;
 381 }
 382
 383 static int check_fb_res_bounds(struct fb_var_screeninfo *var)
 384 {
 385         int xres_min = OMAPFB_PLANE_XRES_MIN;
 386         int xres_max = 2048;
 387         int yres_min = OMAPFB_PLANE_YRES_MIN;
 388         int yres_max = 2048;
 389
 390         /* XXX: some applications seem to set virtual res to 0. */
 391         if (var->xres_virtual == 0)
 392                 var->xres_virtual = var->xres;
 393
 394         if (var->yres_virtual == 0)
 395                 var->yres_virtual = var->yres;
 396
 397         if (var->xres_virtual < xres_min || var->yres_virtual < yres_min)
 398                 return -EINVAL;
 399
 400         if (var->xres < xres_min)
 401                 var->xres = xres_min;
 402         if (var->yres < yres_min)
 403                 var->yres = yres_min;
 404         if (var->xres > xres_max)
 405                 var->xres = xres_max;
 406         if (var->yres > yres_max)
 407                 var->yres = yres_max;
 408
 409         if (var->xres > var->xres_virtual)
 410                 var->xres = var->xres_virtual;
 411         if (var->yres > var->yres_virtual)
 412                 var->yres = var->yres_virtual;
 413
 414         return 0;
 415 }
 416
 417 static void shrink_height(unsigned long max_frame_size,
 418                 struct fb_var_screeninfo *var)
 419 {
 420         DBG("can't fit FB into memory, reducing y\n");
 421         var->yres_virtual = max_frame_size /
 422                 (var->xres_virtual * var->bits_per_pixel >> 3);
 423
 424         if (var->yres_virtual < OMAPFB_PLANE_YRES_MIN)
 425                 var->yres_virtual = OMAPFB_PLANE_YRES_MIN;
 426
 427         if (var->yres > var->yres_virtual)
 428                 var->yres = var->yres_virtual;
 429 }
 430
 431 static void shrink_width(unsigned long max_frame_size,
 432                 struct fb_var_screeninfo *var)
 433 {
 434         DBG("can't fit FB into memory, reducing x\n");
 435         var->xres_virtual = max_frame_size / var->yres_virtual /
 436                 (var->bits_per_pixel >> 3);
 437
 438         if (var->xres_virtual < OMAPFB_PLANE_XRES_MIN)
 439                 var->xres_virtual = OMAPFB_PLANE_XRES_MIN;
 440
 441         if (var->xres > var->xres_virtual)
 442                 var->xres = var->xres_virtual;
 443 }
 444
 445 static int check_vrfb_fb_size(unsigned long region_size,
 446                 const struct fb_var_screeninfo *var)
 447 {
 448         unsigned long min_phys_size = omap_vrfb_min_phys_size(var->xres_virtual,
 449                 var->yres_virtual, var->bits_per_pixel >> 3);
 450
 451         return min_phys_size > region_size ? -EINVAL : 0;
 452 }
 453
 454 static int check_fb_size(const struct omapfb_info *ofbi,
 455                 struct fb_var_screeninfo *var)
 456 {
 457         unsigned long max_frame_size = ofbi->region->size;
 458         int bytespp = var->bits_per_pixel >> 3;
 459         unsigned long line_size = var->xres_virtual * bytespp;
 460
 461         if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
 462                 /* One needs to check for both VRFB and OMAPFB limitations. */
 463                 if (check_vrfb_fb_size(max_frame_size, var))
 464                         shrink_height(omap_vrfb_max_height(
 465                                 max_frame_size, var->xres_virtual, bytespp) *
 466                                 line_size, var);
 467
 468                 if (check_vrfb_fb_size(max_frame_size, var)) {
 469                         DBG("cannot fit FB to memory\n");
 470                         return -EINVAL;
 471                 }
 472
 473                 return 0;
 474         }
 475
 476         DBG("max frame size %lu, line size %lu\n", max_frame_size, line_size);
 477
 478         if (line_size * var->yres_virtual > max_frame_size)
 479                 shrink_height(max_frame_size, var);
 480
 481         if (line_size * var->yres_virtual > max_frame_size) {
 482                 shrink_width(max_frame_size, var);
 483                 line_size = var->xres_virtual * bytespp;
 484         }
 485
 486         if (line_size * var->yres_virtual > max_frame_size) {
 487                 DBG("cannot fit FB to memory\n");
 488                 return -EINVAL;
 489         }
 490
 491         return 0;
 492 }
 493
 494 /*
 495  * Consider if VRFB assisted rotation is in use and if the virtual space for
 496  * the zero degree view needs to be mapped. The need for mapping also acts as
 497  * the trigger for setting up the hardware on the context in question. This
 498  * ensures that one does not attempt to access the virtual view before the
 499  * hardware is serving the address translations.
 500  */
 501 static int setup_vrfb_rotation(struct fb_info *fbi)
 502 {
 503         struct omapfb_info *ofbi = FB2OFB(fbi);
 504         struct omapfb2_mem_region *rg = ofbi->region;
 505         struct vrfb *vrfb = &rg->vrfb;
 506         struct fb_var_screeninfo *var = &fbi->var;
 507         struct fb_fix_screeninfo *fix = &fbi->fix;
 508         unsigned bytespp;
 509         bool yuv_mode;
 510         enum omap_color_mode mode;
 511         int r;
 512         bool reconf;
 513
 514         if (!rg->size || ofbi->rotation_type != OMAP_DSS_ROT_VRFB)
 515                 return 0;
 516
 517         DBG("setup_vrfb_rotation\n");
 518
 519         r = fb_mode_to_dss_mode(var, &mode);
 520         if (r)
 521                 return r;
 522
 523         bytespp = var->bits_per_pixel >> 3;
 524
 525         yuv_mode = mode == OMAP_DSS_COLOR_YUV2 || mode == OMAP_DSS_COLOR_UYVY;
 526
 527         /* We need to reconfigure VRFB if the resolution changes, if yuv mode
 528          * is enabled/disabled, or if bytes per pixel changes */
 529
 530         /* XXX we shouldn't allow this when framebuffer is mmapped */
 531
 532         reconf = false;
 533
 534         if (yuv_mode != vrfb->yuv_mode)
 535                 reconf = true;
 536         else if (bytespp != vrfb->bytespp)
 537                 reconf = true;
 538         else if (vrfb->xres != var->xres_virtual ||
 539                         vrfb->yres != var->yres_virtual)
 540                 reconf = true;
 541
 542         if (vrfb->vaddr[0] && reconf) {
 543                 fbi->screen_base = NULL;
 544                 fix->smem_start = 0;
 545                 fix->smem_len = 0;
 546                 iounmap(vrfb->vaddr[0]);
 547                 vrfb->vaddr[0] = NULL;
 548                 DBG("setup_vrfb_rotation: reset fb\n");
 549         }
 550
 551         if (vrfb->vaddr[0])
 552                 return 0;
 553
 554         omap_vrfb_setup(&rg->vrfb, rg->paddr,
 555                         var->xres_virtual,
 556                         var->yres_virtual,
 557                         bytespp, yuv_mode);
 558
 559         /* Now one can ioremap the 0 angle view */
 560         r = omap_vrfb_map_angle(vrfb, var->yres_virtual, 0);
 561         if (r)
 562                 return r;
 563
 564         /* used by open/write in fbmem.c */
 565         fbi->screen_base = ofbi->region->vrfb.vaddr[0];
 566
 567         fix->smem_start = ofbi->region->vrfb.paddr[0];
 568
 569         switch (var->nonstd) {
 570         case OMAPFB_COLOR_YUV422:
 571         case OMAPFB_COLOR_YUY422:
 572                 fix->line_length =
 573                         (OMAP_VRFB_LINE_LEN * var->bits_per_pixel) >> 2;
 574                 break;
 575         default:
 576                 fix->line_length =
 577                         (OMAP_VRFB_LINE_LEN * var->bits_per_pixel) >> 3;
 578                 break;
 579         }
 580
 581         fix->smem_len = var->yres_virtual * fix->line_length;
 582
 583         return 0;
 584 }
 585
 586 int dss_mode_to_fb_mode(enum omap_color_mode dssmode,
 587                         struct fb_var_screeninfo *var)
 588 {
 589         int i;
 590
 591         for (i = 0; i < ARRAY_SIZE(omapfb_colormodes); ++i) {
 592                 struct omapfb_colormode *mode = &omapfb_colormodes[i];
 593                 if (dssmode == mode->dssmode) {
 594                         assign_colormode_to_var(var, mode);
 595                         return 0;
 596                 }
 597         }
 598         return -ENOENT;
 599 }
 600
 601 void set_fb_fix(struct fb_info *fbi)
 602 {
 603         struct fb_fix_screeninfo *fix = &fbi->fix;
 604         struct fb_var_screeninfo *var = &fbi->var;
 605         struct omapfb_info *ofbi = FB2OFB(fbi);
 606         struct omapfb2_mem_region *rg = ofbi->region;
 607
 608         DBG("set_fb_fix\n");
 609
 610         /* used by open/write in fbmem.c */
 611         fbi->screen_base = (char __iomem *)omapfb_get_region_vaddr(ofbi);
 612
 613         /* used by mmap in fbmem.c */
 614         if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
 615                 switch (var->nonstd) {
 616                 case OMAPFB_COLOR_YUV422:
 617                 case OMAPFB_COLOR_YUY422:
 618                         fix->line_length =
 619                                 (OMAP_VRFB_LINE_LEN * var->bits_per_pixel) >> 2;
 620                         break;
 621                 default:
 622                         fix->line_length =
 623                                 (OMAP_VRFB_LINE_LEN * var->bits_per_pixel) >> 3;
 624                         break;
 625                 }
 626
 627                 fix->smem_len = var->yres_virtual * fix->line_length;
 628         } else {
 629                 fix->line_length =
 630                         (var->xres_virtual * var->bits_per_pixel) >> 3;
 631                 fix->smem_len = rg->size;
 632         }
 633
 634         fix->smem_start = omapfb_get_region_paddr(ofbi);
 635
 636         fix->type = FB_TYPE_PACKED_PIXELS;
 637
 638         if (var->nonstd)
 639                 fix->visual = FB_VISUAL_PSEUDOCOLOR;
 640         else {
 641                 switch (var->bits_per_pixel) {
 642                 case 32:
 643                 case 24:
 644                 case 16:
 645                 case 12:
 646                         fix->visual = FB_VISUAL_TRUECOLOR;
 647                         /* 12bpp is stored in 16 bits */
 648                         break;
 649                 case 1:
 650                 case 2:
 651                 case 4:
 652                 case 8:
 653                         fix->visual = FB_VISUAL_PSEUDOCOLOR;
 654                         break;
 655                 }
 656         }
 657
 658         fix->accel = FB_ACCEL_NONE;
 659
 660         fix->xpanstep = 1;
 661         fix->ypanstep = 1;
 662 }
 663
 664 /* check new var and possibly modify it to be ok */
 665 int check_fb_var(struct fb_info *fbi, struct fb_var_screeninfo *var)
 666 {
 667         struct omapfb_info *ofbi = FB2OFB(fbi);
 668         struct omap_dss_device *display = fb2display(fbi);
 669         enum omap_color_mode mode = 0;
 670         int i;
 671         int r;
 672
 673         DBG("check_fb_var %d\n", ofbi->id);
 674
 675         WARN_ON(!atomic_read(&ofbi->region->lock_count));
 676
 677         r = fb_mode_to_dss_mode(var, &mode);
 678         if (r) {
 679                 DBG("cannot convert var to omap dss mode\n");
 680                 return r;
 681         }
 682
 683         for (i = 0; i < ofbi->num_overlays; ++i) {
 684                 if ((ofbi->overlays[i]->supported_modes & mode) == 0) {
 685                         DBG("invalid mode\n");
 686                         return -EINVAL;
 687                 }
 688         }
 689
 690         if (var->rotate > 3)
 691                 return -EINVAL;
 692
 693         if (check_fb_res_bounds(var))
 694                 return -EINVAL;
 695
 696         /* When no memory is allocated ignore the size check */
 697         if (ofbi->region->size != 0 && check_fb_size(ofbi, var))
 698                 return -EINVAL;
 699
 700         if (var->xres + var->xoffset > var->xres_virtual)
 701                 var->xoffset = var->xres_virtual - var->xres;
 702         if (var->yres + var->yoffset > var->yres_virtual)
 703                 var->yoffset = var->yres_virtual - var->yres;
 704
 705         DBG("xres = %d, yres = %d, vxres = %d, vyres = %d\n",
 706                         var->xres, var->yres,
 707                         var->xres_virtual, var->yres_virtual);
 708
 709         if (display && display->driver->get_dimensions) {
 710                 u32 w, h;
 711                 display->driver->get_dimensions(display, &w, &h);
 712                 var->width = DIV_ROUND_CLOSEST(w, 1000);
 713                 var->height = DIV_ROUND_CLOSEST(h, 1000);
 714         } else {
 715                 var->height = -1;
 716                 var->width = -1;
 717         }
 718
 719         var->grayscale          = 0;
 720
 721         if (display && display->driver->get_timings) {
 722                 struct omap_video_timings timings;
 723                 display->driver->get_timings(display, &timings);
 724
 725                 /* pixclock in ps, the rest in pixclock */
 726                 var->pixclock = timings.pixelclock != 0 ?
 727                         KHZ2PICOS(timings.pixelclock / 1000) :
 728                         0;
 729                 var->left_margin = timings.hbp;
 730                 var->right_margin = timings.hfp;
 731                 var->upper_margin = timings.vbp;
 732                 var->lower_margin = timings.vfp;
 733                 var->hsync_len = timings.hsw;
 734                 var->vsync_len = timings.vsw;
 735                 var->sync |= timings.hsync_level == OMAPDSS_SIG_ACTIVE_HIGH ?
 736                                 FB_SYNC_HOR_HIGH_ACT : 0;
 737                 var->sync |= timings.vsync_level == OMAPDSS_SIG_ACTIVE_HIGH ?
 738                                 FB_SYNC_VERT_HIGH_ACT : 0;
 739                 var->vmode = timings.interlace ?
 740                                 FB_VMODE_INTERLACED : FB_VMODE_NONINTERLACED;
 741         } else {
 742                 var->pixclock = 0;
 743                 var->left_margin = 0;
 744                 var->right_margin = 0;
 745                 var->upper_margin = 0;
 746                 var->lower_margin = 0;
 747                 var->hsync_len = 0;
 748                 var->vsync_len = 0;
 749                 var->sync = 0;
 750                 var->vmode = FB_VMODE_NONINTERLACED;
 751         }
 752
 753         return 0;
 754 }
 755
 756 /*
 757  * ---------------------------------------------------------------------------
 758  * fbdev framework callbacks
 759  * ---------------------------------------------------------------------------
 760  */
 761 static int omapfb_open(struct fb_info *fbi, int user)
 762 {
 763         return 0;
 764 }
 765
 766 static int omapfb_release(struct fb_info *fbi, int user)
 767 {
 768         return 0;
 769 }
 770
 771 static unsigned calc_rotation_offset_dma(const struct fb_var_screeninfo *var,
 772                 const struct fb_fix_screeninfo *fix, int rotation)
 773 {
 774         unsigned offset;
 775
 776         offset = var->yoffset * fix->line_length +
 777                 var->xoffset * (var->bits_per_pixel >> 3);
 778
 779         return offset;
 780 }
 781
 782 static unsigned calc_rotation_offset_vrfb(const struct fb_var_screeninfo *var,
 783                 const struct fb_fix_screeninfo *fix, int rotation)
 784 {
 785         unsigned offset;
 786
 787         if (rotation == FB_ROTATE_UD)
 788                 offset = (var->yres_virtual - var->yres) *
 789                         fix->line_length;
 790         else if (rotation == FB_ROTATE_CW)
 791                 offset = (var->yres_virtual - var->yres) *
 792                         (var->bits_per_pixel >> 3);
 793         else
 794                 offset = 0;
 795
 796         if (rotation == FB_ROTATE_UR)
 797                 offset += var->yoffset * fix->line_length +
 798                         var->xoffset * (var->bits_per_pixel >> 3);
 799         else if (rotation == FB_ROTATE_UD)
 800                 offset -= var->yoffset * fix->line_length +
 801                         var->xoffset * (var->bits_per_pixel >> 3);
 802         else if (rotation == FB_ROTATE_CW)
 803                 offset -= var->xoffset * fix->line_length +
 804                         var->yoffset * (var->bits_per_pixel >> 3);
 805         else if (rotation == FB_ROTATE_CCW)
 806                 offset += var->xoffset * fix->line_length +
 807                         var->yoffset * (var->bits_per_pixel >> 3);
 808
 809         return offset;
 810 }
 811
 812 static void omapfb_calc_addr(const struct omapfb_info *ofbi,
 813                              const struct fb_var_screeninfo *var,
 814                              const struct fb_fix_screeninfo *fix,
 815                              int rotation, u32 *paddr)
 816 {
 817         u32 data_start_p;
 818         int offset;
 819
 820         if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB)
 821                 data_start_p = omapfb_get_region_rot_paddr(ofbi, rotation);
 822         else
 823                 data_start_p = omapfb_get_region_paddr(ofbi);
 824
 825         if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB)
 826                 offset = calc_rotation_offset_vrfb(var, fix, rotation);
 827         else
 828                 offset = calc_rotation_offset_dma(var, fix, rotation);
 829
 830         data_start_p += offset;
 831
 832         if (offset)
 833                 DBG("offset %d, %d = %d\n",
 834                     var->xoffset, var->yoffset, offset);
 835
 836         DBG("paddr %x\n", data_start_p);
 837
 838         *paddr = data_start_p;
 839 }
 840
 841 /* setup overlay according to the fb */
 842 int omapfb_setup_overlay(struct fb_info *fbi, struct omap_overlay *ovl,
 843                 u16 posx, u16 posy, u16 outw, u16 outh)
 844 {
 845         int r = 0;
 846         struct omapfb_info *ofbi = FB2OFB(fbi);
 847         struct fb_var_screeninfo *var = &fbi->var;
 848         struct fb_fix_screeninfo *fix = &fbi->fix;
 849         enum omap_color_mode mode = 0;
 850         u32 data_start_p = 0;
 851         struct omap_overlay_info info;
 852         int xres, yres;
 853         int screen_width;
 854         int mirror;
 855         int rotation = var->rotate;
 856         int i;
 857
 858         WARN_ON(!atomic_read(&ofbi->region->lock_count));
 859
 860         for (i = 0; i < ofbi->num_overlays; i++) {
 861                 if (ovl != ofbi->overlays[i])
 862                         continue;
 863
 864                 rotation = (rotation + ofbi->rotation[i]) % 4;
 865                 break;
 866         }
 867
 868         DBG("setup_overlay %d, posx %d, posy %d, outw %d, outh %d\n", ofbi->id,
 869                         posx, posy, outw, outh);
 870
 871         if (rotation == FB_ROTATE_CW || rotation == FB_ROTATE_CCW) {
 872                 xres = var->yres;
 873                 yres = var->xres;
 874         } else {
 875                 xres = var->xres;
 876                 yres = var->yres;
 877         }
 878
 879         if (ofbi->region->size)
 880                 omapfb_calc_addr(ofbi, var, fix, rotation, &data_start_p);
 881
 882         r = fb_mode_to_dss_mode(var, &mode);
 883         if (r) {
 884                 DBG("fb_mode_to_dss_mode failed");
 885                 goto err;
 886         }
 887
 888         switch (var->nonstd) {
 889         case OMAPFB_COLOR_YUV422:
 890         case OMAPFB_COLOR_YUY422:
 891                 if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
 892                         screen_width = fix->line_length
 893                                 / (var->bits_per_pixel >> 2);
 894                         break;
 895                 }
 896                 /* fall through */
 897         default:
 898                 screen_width = fix->line_length / (var->bits_per_pixel >> 3);
 899                 break;
 900         }
 901
 902         ovl->get_overlay_info(ovl, &info);
 903
 904         if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB)
 905                 mirror = 0;
 906         else
 907                 mirror = ofbi->mirror;
 908
 909         info.paddr = data_start_p;
 910         info.screen_width = screen_width;
 911         info.width = xres;
 912         info.height = yres;
 913         info.color_mode = mode;
 914         info.rotation_type = ofbi->rotation_type;
 915         info.rotation = rotation;
 916         info.mirror = mirror;
 917
 918         info.pos_x = posx;
 919         info.pos_y = posy;
 920         info.out_width = outw;
 921         info.out_height = outh;
 922
 923         r = ovl->set_overlay_info(ovl, &info);
 924         if (r) {
 925                 DBG("ovl->setup_overlay_info failed\n");
 926                 goto err;
 927         }
 928
 929         return 0;
 930
 931 err:
 932         DBG("setup_overlay failed\n");
 933         return r;
 934 }
 935
 936 /* apply var to the overlay */
 937 int omapfb_apply_changes(struct fb_info *fbi, int init)
 938 {
 939         int r = 0;
 940         struct omapfb_info *ofbi = FB2OFB(fbi);
 941         struct fb_var_screeninfo *var = &fbi->var;
 942         struct omap_overlay *ovl;
 943         u16 posx, posy;
 944         u16 outw, outh;
 945         int i;
 946
 947 #ifdef DEBUG
 948         if (omapfb_test_pattern)
 949                 fill_fb(fbi);
 950 #endif
 951
 952         WARN_ON(!atomic_read(&ofbi->region->lock_count));
 953
 954         for (i = 0; i < ofbi->num_overlays; i++) {
 955                 ovl = ofbi->overlays[i];
 956
 957                 DBG("apply_changes, fb %d, ovl %d\n", ofbi->id, ovl->id);
 958
 959                 if (ofbi->region->size == 0) {
 960                         /* the fb is not available. disable the overlay */
 961                         omapfb_overlay_enable(ovl, 0);
 962                         if (!init && ovl->manager)
 963                                 ovl->manager->apply(ovl->manager);
 964                         continue;
 965                 }
 966
 967                 if (init || (ovl->caps & OMAP_DSS_OVL_CAP_SCALE) == 0) {
 968                         int rotation = (var->rotate + ofbi->rotation[i]) % 4;
 969                         if (rotation == FB_ROTATE_CW ||
 970                                         rotation == FB_ROTATE_CCW) {
 971                                 outw = var->yres;
 972                                 outh = var->xres;
 973                         } else {
 974                                 outw = var->xres;
 975                                 outh = var->yres;
 976                         }
 977                 } else {
 978                         struct omap_overlay_info info;
 979                         ovl->get_overlay_info(ovl, &info);
 980                         outw = info.out_width;
 981                         outh = info.out_height;
 982                 }
 983
 984                 if (init) {
 985                         posx = 0;
 986                         posy = 0;
 987                 } else {
 988                         struct omap_overlay_info info;
 989                         ovl->get_overlay_info(ovl, &info);
 990                         posx = info.pos_x;
 991                         posy = info.pos_y;
 992                 }
 993
 994                 r = omapfb_setup_overlay(fbi, ovl, posx, posy, outw, outh);
 995                 if (r)
 996                         goto err;
 997
 998                 if (!init && ovl->manager)
 999                         ovl->manager->apply(ovl->manager);
1000         }
1001         return 0;
1002 err:
1003         DBG("apply_changes failed\n");
1004         return r;
1005 }
1006
1007 /* checks var and eventually tweaks it to something supported,
1008  * DO NOT MODIFY PAR */
1009 static int omapfb_check_var(struct fb_var_screeninfo *var, struct fb_info *fbi)
1010 {
1011         struct omapfb_info *ofbi = FB2OFB(fbi);
1012         int r;
1013
1014         DBG("check_var(%d)\n", FB2OFB(fbi)->id);
1015
1016         omapfb_get_mem_region(ofbi->region);
1017
1018         r = check_fb_var(fbi, var);
1019
1020         omapfb_put_mem_region(ofbi->region);
1021
1022         return r;
1023 }
1024
1025 /* set the video mode according to info->var */
1026 static int omapfb_set_par(struct fb_info *fbi)
1027 {
1028         struct omapfb_info *ofbi = FB2OFB(fbi);
1029         int r;
1030
1031         DBG("set_par(%d)\n", FB2OFB(fbi)->id);
1032
1033         omapfb_get_mem_region(ofbi->region);
1034
1035         set_fb_fix(fbi);
1036
1037         r = setup_vrfb_rotation(fbi);
1038         if (r)
1039                 goto out;
1040
1041         r = omapfb_apply_changes(fbi, 0);
1042
1043  out:
1044         omapfb_put_mem_region(ofbi->region);
1045
1046         return r;
1047 }
1048
1049 static int omapfb_pan_display(struct fb_var_screeninfo *var,
1050                 struct fb_info *fbi)
1051 {
1052         struct omapfb_info *ofbi = FB2OFB(fbi);
1053         struct fb_var_screeninfo new_var;
1054         int r;
1055
1056         DBG("pan_display(%d)\n", FB2OFB(fbi)->id);
1057
1058         if (var->xoffset == fbi->var.xoffset &&
1059             var->yoffset == fbi->var.yoffset)
1060                 return 0;
1061
1062         new_var = fbi->var;
1063         new_var.xoffset = var->xoffset;
1064         new_var.yoffset = var->yoffset;
1065
1066         fbi->var = new_var;
1067
1068         omapfb_get_mem_region(ofbi->region);
1069
1070         r = omapfb_apply_changes(fbi, 0);
1071
1072         omapfb_put_mem_region(ofbi->region);
1073
1074         return r;
1075 }
1076
1077 static void mmap_user_open(struct vm_area_struct *vma)
1078 {
1079         struct omapfb2_mem_region *rg = vma->vm_private_data;
1080
1081         omapfb_get_mem_region(rg);
1082         atomic_inc(&rg->map_count);
1083         omapfb_put_mem_region(rg);
1084 }
1085
1086 static void mmap_user_close(struct vm_area_struct *vma)
1087 {
1088         struct omapfb2_mem_region *rg = vma->vm_private_data;
1089
1090         omapfb_get_mem_region(rg);
1091         atomic_dec(&rg->map_count);
1092         omapfb_put_mem_region(rg);
1093 }
1094
1095 static const struct vm_operations_struct mmap_user_ops = {
1096         .open = mmap_user_open,
1097         .close = mmap_user_close,
1098 };
1099
1100 static int omapfb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
1101 {
1102         struct omapfb_info *ofbi = FB2OFB(fbi);
1103         struct fb_fix_screeninfo *fix = &fbi->fix;
1104         struct omapfb2_mem_region *rg;
1105         unsigned long start;
1106         u32 len;
1107         int r;
1108
1109         rg = omapfb_get_mem_region(ofbi->region);
1110
1111         start = omapfb_get_region_paddr(ofbi);
1112         len = fix->smem_len;
1113
1114         DBG("user mmap region start %lx, len %d, off %lx\n", start, len,
1115                         vma->vm_pgoff << PAGE_SHIFT);
1116
1117         vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
1118         vma->vm_ops = &mmap_user_ops;
1119         vma->vm_private_data = rg;
1120
1121         r = vm_iomap_memory(vma, start, len);
1122         if (r)
1123                 goto error;
1124
1125         /* vm_ops.open won't be called for mmap itself. */
1126         atomic_inc(&rg->map_count);
1127
1128         omapfb_put_mem_region(rg);
1129
1130         return 0;
1131
1132 error:
1133         omapfb_put_mem_region(ofbi->region);
1134
1135         return r;
1136 }
1137
1138 /* Store a single color palette entry into a pseudo palette or the hardware
1139  * palette if one is available. For now we support only 16bpp and thus store
1140  * the entry only to the pseudo palette.
1141  */
1142 static int _setcolreg(struct fb_info *fbi, u_int regno, u_int red, u_int green,
1143                 u_int blue, u_int transp, int update_hw_pal)
1144 {
1145         /*struct omapfb_info *ofbi = FB2OFB(fbi);*/
1146         /*struct omapfb2_device *fbdev = ofbi->fbdev;*/
1147         struct fb_var_screeninfo *var = &fbi->var;
1148         int r = 0;
1149
1150         enum omapfb_color_format mode = OMAPFB_COLOR_RGB24U; /* XXX */
1151
1152         /*switch (plane->color_mode) {*/
1153         switch (mode) {
1154         case OMAPFB_COLOR_YUV422:
1155         case OMAPFB_COLOR_YUV420:
1156         case OMAPFB_COLOR_YUY422:
1157                 r = -EINVAL;
1158                 break;
1159         case OMAPFB_COLOR_CLUT_8BPP:
1160         case OMAPFB_COLOR_CLUT_4BPP:
1161         case OMAPFB_COLOR_CLUT_2BPP:
1162         case OMAPFB_COLOR_CLUT_1BPP:
1163                 /*
1164                    if (fbdev->ctrl->setcolreg)
1165                    r = fbdev->ctrl->setcolreg(regno, red, green, blue,
1166                    transp, update_hw_pal);
1167                    */
1168                 /* Fallthrough */
1169                 r = -EINVAL;
1170                 break;
1171         case OMAPFB_COLOR_RGB565:
1172         case OMAPFB_COLOR_RGB444:
1173         case OMAPFB_COLOR_RGB24P:
1174         case OMAPFB_COLOR_RGB24U:
1175                 if (r != 0)
1176                         break;
1177
1178                 if (regno < 16) {
1179                         u32 pal;
1180                         pal = ((red >> (16 - var->red.length)) <<
1181                                         var->red.offset) |
1182                                 ((green >> (16 - var->green.length)) <<
1183                                  var->green.offset) |
1184                                 (blue >> (16 - var->blue.length));
1185                         ((u32 *)(fbi->pseudo_palette))[regno] = pal;
1186                 }
1187                 break;
1188         default:
1189                 BUG();
1190         }
1191         return r;
1192 }
1193
1194 static int omapfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
1195                 u_int transp, struct fb_info *info)
1196 {
1197         DBG("setcolreg\n");
1198
1199         return _setcolreg(info, regno, red, green, blue, transp, 1);
1200 }
1201
1202 static int omapfb_setcmap(struct fb_cmap *cmap, struct fb_info *info)
1203 {
1204         int count, index, r;
1205         u16 *red, *green, *blue, *transp;
1206         u16 trans = 0xffff;
1207
1208         DBG("setcmap\n");
1209
1210         red     = cmap->red;
1211         green   = cmap->green;
1212         blue    = cmap->blue;
1213         transp  = cmap->transp;
1214         index   = cmap->start;
1215
1216         for (count = 0; count < cmap->len; count++) {
1217                 if (transp)
1218                         trans = *transp++;
1219                 r = _setcolreg(info, index++, *red++, *green++, *blue++, trans,
1220                                 count == cmap->len - 1);
1221                 if (r != 0)
1222                         return r;
1223         }
1224
1225         return 0;
1226 }
1227
1228 static int omapfb_blank(int blank, struct fb_info *fbi)
1229 {
1230         struct omapfb_info *ofbi = FB2OFB(fbi);
1231         struct omapfb2_device *fbdev = ofbi->fbdev;
1232         struct omap_dss_device *display = fb2display(fbi);
1233         struct omapfb_display_data *d;
1234         int r = 0;
1235
1236         if (!display)
1237                 return -EINVAL;
1238
1239         omapfb_lock(fbdev);
1240
1241         d = get_display_data(fbdev, display);
1242
1243         switch (blank) {
1244         case FB_BLANK_UNBLANK:
1245                 if (display->state == OMAP_DSS_DISPLAY_ACTIVE)
1246                         goto exit;
1247
1248                 r = display->driver->enable(display);
1249
1250                 if ((display->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE) &&
1251                                 d->update_mode == OMAPFB_AUTO_UPDATE &&
1252                                 !d->auto_update_work_enabled)
1253                         omapfb_start_auto_update(fbdev, display);
1254
1255                 break;
1256
1257         case FB_BLANK_NORMAL:
1258                 /* FB_BLANK_NORMAL could be implemented.
1259                  * Needs DSS additions. */
1260         case FB_BLANK_VSYNC_SUSPEND:
1261         case FB_BLANK_HSYNC_SUSPEND:
1262         case FB_BLANK_POWERDOWN:
1263                 if (display->state != OMAP_DSS_DISPLAY_ACTIVE)
1264                         goto exit;
1265
1266                 if (d->auto_update_work_enabled)
1267                         omapfb_stop_auto_update(fbdev, display);
1268
1269                 display->driver->disable(display);
1270
1271                 break;
1272
1273         default:
1274                 r = -EINVAL;
1275         }
1276
1277 exit:
1278         omapfb_unlock(fbdev);
1279
1280         return r;
1281 }
1282
1283 #if 0
1284 /* XXX fb_read and fb_write are needed for VRFB */
1285 ssize_t omapfb_write(struct fb_info *info, const char __user *buf,
1286                 size_t count, loff_t *ppos)
1287 {
1288         DBG("omapfb_write %d, %lu\n", count, (unsigned long)*ppos);
1289         /* XXX needed for VRFB */
1290         return count;
1291 }
1292 #endif
1293
1294 static struct fb_ops omapfb_ops = {
1295         .owner          = THIS_MODULE,
1296         .fb_open        = omapfb_open,
1297         .fb_release     = omapfb_release,
1298         .fb_fillrect    = cfb_fillrect,
1299         .fb_copyarea    = cfb_copyarea,
1300         .fb_imageblit   = cfb_imageblit,
1301         .fb_blank       = omapfb_blank,
1302         .fb_ioctl       = omapfb_ioctl,
1303         .fb_check_var   = omapfb_check_var,
1304         .fb_set_par     = omapfb_set_par,
1305         .fb_pan_display = omapfb_pan_display,
1306         .fb_mmap        = omapfb_mmap,
1307         .fb_setcolreg   = omapfb_setcolreg,
1308         .fb_setcmap     = omapfb_setcmap,
1309         /*.fb_write     = omapfb_write,*/
1310 };
1311
1312 static void omapfb_free_fbmem(struct fb_info *fbi)
1313 {
1314         struct omapfb_info *ofbi = FB2OFB(fbi);
1315         struct omapfb2_device *fbdev = ofbi->fbdev;
1316         struct omapfb2_mem_region *rg;
1317
1318         rg = ofbi->region;
1319
1320         if (rg->token == NULL)
1321                 return;
1322
1323         WARN_ON(atomic_read(&rg->map_count));
1324
1325         if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
1326                 /* unmap the 0 angle rotation */
1327                 if (rg->vrfb.vaddr[0]) {
1328                         iounmap(rg->vrfb.vaddr[0]);
1329                         rg->vrfb.vaddr[0] = NULL;
1330                 }
1331
1332                 omap_vrfb_release_ctx(&rg->vrfb);
1333         }
1334
1335         dma_free_attrs(fbdev->dev, rg->size, rg->token, rg->dma_handle,
1336                         rg->attrs);
1337
1338         rg->token = NULL;
1339         rg->vaddr = NULL;
1340         rg->paddr = 0;
1341         rg->alloc = 0;
1342         rg->size = 0;
1343 }
1344
1345 static void clear_fb_info(struct fb_info *fbi)
1346 {
1347         memset(&fbi->var, 0, sizeof(fbi->var));
1348         memset(&fbi->fix, 0, sizeof(fbi->fix));
1349         strlcpy(fbi->fix.id, MODULE_NAME, sizeof(fbi->fix.id));
1350 }
1351
1352 static int omapfb_free_all_fbmem(struct omapfb2_device *fbdev)
1353 {
1354         int i;
1355
1356         DBG("free all fbmem\n");
1357
1358         for (i = 0; i < fbdev->num_fbs; i++) {
1359                 struct fb_info *fbi = fbdev->fbs[i];
1360                 omapfb_free_fbmem(fbi);
1361                 clear_fb_info(fbi);
1362         }
1363
1364         return 0;
1365 }
1366
1367 static int omapfb_alloc_fbmem(struct fb_info *fbi, unsigned long size,
1368                 unsigned long paddr)
1369 {
1370         struct omapfb_info *ofbi = FB2OFB(fbi);
1371         struct omapfb2_device *fbdev = ofbi->fbdev;
1372         struct omapfb2_mem_region *rg;
1373         void *token;
1374         unsigned long attrs;
1375         dma_addr_t dma_handle;
1376         int r;
1377
1378         rg = ofbi->region;
1379
1380         rg->paddr = 0;
1381         rg->vaddr = NULL;
1382         memset(&rg->vrfb, 0, sizeof rg->vrfb);
1383         rg->size = 0;
1384         rg->type = 0;
1385         rg->alloc = false;
1386         rg->map = false;
1387
1388         size = PAGE_ALIGN(size);
1389
1390         attrs = DMA_ATTR_WRITE_COMBINE;
1391
1392         if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB)
1393                 attrs |= DMA_ATTR_NO_KERNEL_MAPPING;
1394
1395         DBG("allocating %lu bytes for fb %d\n", size, ofbi->id);
1396
1397         token = dma_alloc_attrs(fbdev->dev, size, &dma_handle,
1398                         GFP_KERNEL, attrs);
1399
1400         if (token == NULL) {
1401                 dev_err(fbdev->dev, "failed to allocate framebuffer\n");
1402                 return -ENOMEM;
1403         }
1404
1405         DBG("allocated VRAM paddr %lx, vaddr %p\n",
1406                         (unsigned long)dma_handle, token);
1407
1408         if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
1409                 r = omap_vrfb_request_ctx(&rg->vrfb);
1410                 if (r) {
1411                         dma_free_attrs(fbdev->dev, size, token, dma_handle,
1412                                         attrs);
1413                         dev_err(fbdev->dev, "vrfb create ctx failed\n");
1414                         return r;
1415                 }
1416         }
1417
1418         rg->attrs = attrs;
1419         rg->token = token;
1420         rg->dma_handle = dma_handle;
1421
1422         rg->paddr = (unsigned long)dma_handle;
1423         rg->vaddr = (void __iomem *)token;
1424         rg->size = size;
1425         rg->alloc = 1;
1426
1427         return 0;
1428 }
1429
1430 /* allocate fbmem using display resolution as reference */
1431 static int omapfb_alloc_fbmem_display(struct fb_info *fbi, unsigned long size,
1432                 unsigned long paddr)
1433 {
1434         struct omapfb_info *ofbi = FB2OFB(fbi);
1435         struct omapfb2_device *fbdev = ofbi->fbdev;
1436         struct omap_dss_device *display;
1437         int bytespp;
1438
1439         display =  fb2display(fbi);
1440
1441         if (!display)
1442                 return 0;
1443
1444         switch (omapfb_get_recommended_bpp(fbdev, display)) {
1445         case 16:
1446                 bytespp = 2;
1447                 break;
1448         case 24:
1449                 bytespp = 4;
1450                 break;
1451         default:
1452                 bytespp = 4;
1453                 break;
1454         }
1455
1456         if (!size) {
1457                 u16 w, h;
1458
1459                 display->driver->get_resolution(display, &w, &h);
1460
1461                 if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
1462                         size = max(omap_vrfb_min_phys_size(w, h, bytespp),
1463                                         omap_vrfb_min_phys_size(h, w, bytespp));
1464
1465                         DBG("adjusting fb mem size for VRFB, %u -> %lu\n",
1466                                         w * h * bytespp, size);
1467                 } else {
1468                         size = w * h * bytespp;
1469                 }
1470         }
1471
1472         if (!size)
1473                 return 0;
1474
1475         return omapfb_alloc_fbmem(fbi, size, paddr);
1476 }
1477
1478 static int omapfb_parse_vram_param(const char *param, int max_entries,
1479                 unsigned long *sizes, unsigned long *paddrs)
1480 {
1481         unsigned int fbnum;
1482         unsigned long size;
1483         unsigned long paddr = 0;
1484         char *p, *start;
1485
1486         start = (char *)param;
1487
1488         while (1) {
1489                 p = start;
1490
1491                 fbnum = simple_strtoul(p, &p, 10);
1492
1493                 if (p == start)
1494                         return -EINVAL;
1495
1496                 if (*p != ':')
1497                         return -EINVAL;
1498
1499                 if (fbnum >= max_entries)
1500                         return -EINVAL;
1501
1502                 size = memparse(p + 1, &p);
1503
1504                 if (!size)
1505                         return -EINVAL;
1506
1507                 paddr = 0;
1508
1509                 if (*p == '@') {
1510                         paddr = simple_strtoul(p + 1, &p, 16);
1511
1512                         if (!paddr)
1513                                 return -EINVAL;
1514
1515                 }
1516
1517                 WARN_ONCE(paddr,
1518                         "reserving memory at predefined address not supported\n");
1519
1520                 paddrs[fbnum] = paddr;
1521                 sizes[fbnum] = size;
1522
1523                 if (*p == 0)
1524                         break;
1525
1526                 if (*p != ',')
1527                         return -EINVAL;
1528
1529                 ++p;
1530
1531                 start = p;
1532         }
1533
1534         return 0;
1535 }
1536
1537 static int omapfb_allocate_all_fbs(struct omapfb2_device *fbdev)
1538 {
1539         int i, r;
1540         unsigned long vram_sizes[10];
1541         unsigned long vram_paddrs[10];
1542
1543         memset(&vram_sizes, 0, sizeof(vram_sizes));
1544         memset(&vram_paddrs, 0, sizeof(vram_paddrs));
1545
1546         if (def_vram && omapfb_parse_vram_param(def_vram, 10,
1547                                 vram_sizes, vram_paddrs)) {
1548                 dev_err(fbdev->dev, "failed to parse vram parameter\n");
1549
1550                 memset(&vram_sizes, 0, sizeof(vram_sizes));
1551                 memset(&vram_paddrs, 0, sizeof(vram_paddrs));
1552         }
1553
1554         for (i = 0; i < fbdev->num_fbs; i++) {
1555                 /* allocate memory automatically only for fb0, or if
1556                  * excplicitly defined with vram or plat data option */
1557                 if (i == 0 || vram_sizes[i] != 0) {
1558                         r = omapfb_alloc_fbmem_display(fbdev->fbs[i],
1559                                         vram_sizes[i], vram_paddrs[i]);
1560
1561                         if (r)
1562                                 return r;
1563                 }
1564         }
1565
1566         for (i = 0; i < fbdev->num_fbs; i++) {
1567                 struct omapfb_info *ofbi = FB2OFB(fbdev->fbs[i]);
1568                 struct omapfb2_mem_region *rg;
1569                 rg = ofbi->region;
1570
1571                 DBG("region%d phys %08x virt %p size=%lu\n",
1572                                 i,
1573                                 rg->paddr,
1574                                 rg->vaddr,
1575                                 rg->size);
1576         }
1577
1578         return 0;
1579 }
1580
1581 static void omapfb_clear_fb(struct fb_info *fbi)
1582 {
1583         const struct fb_fillrect rect = {
1584                 .dx = 0,
1585                 .dy = 0,
1586                 .width = fbi->var.xres_virtual,
1587                 .height = fbi->var.yres_virtual,
1588                 .color = 0,
1589                 .rop = ROP_COPY,
1590         };
1591
1592         cfb_fillrect(fbi, &rect);
1593 }
1594
1595 int omapfb_realloc_fbmem(struct fb_info *fbi, unsigned long size, int type)
1596 {
1597         struct omapfb_info *ofbi = FB2OFB(fbi);
1598         struct omapfb2_device *fbdev = ofbi->fbdev;
1599         struct omapfb2_mem_region *rg = ofbi->region;
1600         unsigned long old_size = rg->size;
1601         unsigned long old_paddr = rg->paddr;
1602         int old_type = rg->type;
1603         int r;
1604
1605         if (type != OMAPFB_MEMTYPE_SDRAM)
1606                 return -EINVAL;
1607
1608         size = PAGE_ALIGN(size);
1609
1610         if (old_size == size && old_type == type)
1611                 return 0;
1612
1613         omapfb_free_fbmem(fbi);
1614
1615         if (size == 0) {
1616                 clear_fb_info(fbi);
1617                 return 0;
1618         }
1619
1620         r = omapfb_alloc_fbmem(fbi, size, 0);
1621
1622         if (r) {
1623                 if (old_size)
1624                         omapfb_alloc_fbmem(fbi, old_size, old_paddr);
1625
1626                 if (rg->size == 0)
1627                         clear_fb_info(fbi);
1628
1629                 return r;
1630         }
1631
1632         if (old_size == size)
1633                 return 0;
1634
1635         if (old_size == 0) {
1636                 DBG("initializing fb %d\n", ofbi->id);
1637                 r = omapfb_fb_init(fbdev, fbi);
1638                 if (r) {
1639                         DBG("omapfb_fb_init failed\n");
1640                         goto err;
1641                 }
1642                 r = omapfb_apply_changes(fbi, 1);
1643                 if (r) {
1644                         DBG("omapfb_apply_changes failed\n");
1645                         goto err;
1646                 }
1647         } else {
1648                 struct fb_var_screeninfo new_var;
1649                 memcpy(&new_var, &fbi->var, sizeof(new_var));
1650                 r = check_fb_var(fbi, &new_var);
1651                 if (r)
1652                         goto err;
1653                 memcpy(&fbi->var, &new_var, sizeof(fbi->var));
1654                 set_fb_fix(fbi);
1655                 r = setup_vrfb_rotation(fbi);
1656                 if (r)
1657                         goto err;
1658         }
1659
1660         omapfb_clear_fb(fbi);
1661
1662         return 0;
1663 err:
1664         omapfb_free_fbmem(fbi);
1665         clear_fb_info(fbi);
1666         return r;
1667 }
1668
1669 static void omapfb_auto_update_work(struct work_struct *work)
1670 {
1671         struct omap_dss_device *dssdev;
1672         struct omap_dss_driver *dssdrv;
1673         struct omapfb_display_data *d;
1674         u16 w, h;
1675         unsigned int freq;
1676         struct omapfb2_device *fbdev;
1677
1678         d = container_of(work, struct omapfb_display_data,
1679                         auto_update_work.work);
1680
1681         dssdev = d->dssdev;
1682         dssdrv = dssdev->driver;
1683         fbdev = d->fbdev;
1684
1685         if (!dssdrv || !dssdrv->update)
1686                 return;
1687
1688         if (dssdrv->sync)
1689                 dssdrv->sync(dssdev);
1690
1691         dssdrv->get_resolution(dssdev, &w, &h);
1692         dssdrv->update(dssdev, 0, 0, w, h);
1693
1694         freq = auto_update_freq;
1695         if (freq == 0)
1696                 freq = 20;
1697         queue_delayed_work(fbdev->auto_update_wq,
1698                         &d->auto_update_work, HZ / freq);
1699 }
1700
1701 void omapfb_start_auto_update(struct omapfb2_device *fbdev,
1702                 struct omap_dss_device *display)
1703 {
1704         struct omapfb_display_data *d;
1705
1706         if (fbdev->auto_update_wq == NULL) {
1707                 struct workqueue_struct *wq;
1708
1709                 wq = create_singlethread_workqueue("omapfb_auto_update");
1710
1711                 if (wq == NULL) {
1712                         dev_err(fbdev->dev, "Failed to create workqueue for "
1713                                         "auto-update\n");
1714                         return;
1715                 }
1716
1717                 fbdev->auto_update_wq = wq;
1718         }
1719
1720         d = get_display_data(fbdev, display);
1721
1722         INIT_DELAYED_WORK(&d->auto_update_work, omapfb_auto_update_work);
1723
1724         d->auto_update_work_enabled = true;
1725
1726         omapfb_auto_update_work(&d->auto_update_work.work);
1727 }
1728
1729 void omapfb_stop_auto_update(struct omapfb2_device *fbdev,
1730                 struct omap_dss_device *display)
1731 {
1732         struct omapfb_display_data *d;
1733
1734         d = get_display_data(fbdev, display);
1735
1736         cancel_delayed_work_sync(&d->auto_update_work);
1737
1738         d->auto_update_work_enabled = false;
1739 }
1740
1741 /* initialize fb_info, var, fix to something sane based on the display */
1742 static int omapfb_fb_init(struct omapfb2_device *fbdev, struct fb_info *fbi)
1743 {
1744         struct fb_var_screeninfo *var = &fbi->var;
1745         struct omap_dss_device *display = fb2display(fbi);
1746         struct omapfb_info *ofbi = FB2OFB(fbi);
1747         int r = 0;
1748
1749         fbi->fbops = &omapfb_ops;
1750         fbi->flags = FBINFO_FLAG_DEFAULT;
1751         fbi->pseudo_palette = fbdev->pseudo_palette;
1752
1753         if (ofbi->region->size == 0) {
1754                 clear_fb_info(fbi);
1755                 return 0;
1756         }
1757
1758         var->nonstd = 0;
1759         var->bits_per_pixel = 0;
1760
1761         var->rotate = def_rotate;
1762
1763         if (display) {
1764                 u16 w, h;
1765                 int rotation = (var->rotate + ofbi->rotation[0]) % 4;
1766
1767                 display->driver->get_resolution(display, &w, &h);
1768
1769                 if (rotation == FB_ROTATE_CW ||
1770                                 rotation == FB_ROTATE_CCW) {
1771                         var->xres = h;
1772                         var->yres = w;
1773                 } else {
1774                         var->xres = w;
1775                         var->yres = h;
1776                 }
1777
1778                 var->xres_virtual = var->xres;
1779                 var->yres_virtual = var->yres;
1780
1781                 if (!var->bits_per_pixel) {
1782                         switch (omapfb_get_recommended_bpp(fbdev, display)) {
1783                         case 16:
1784                                 var->bits_per_pixel = 16;
1785                                 break;
1786                         case 24:
1787                                 var->bits_per_pixel = 32;
1788                                 break;
1789                         default:
1790                                 dev_err(fbdev->dev, "illegal display "
1791                                                 "bpp\n");
1792                                 return -EINVAL;
1793                         }
1794                 }
1795         } else {
1796                 /* if there's no display, let's just guess some basic values */
1797                 var->xres = 320;
1798                 var->yres = 240;
1799                 var->xres_virtual = var->xres;
1800                 var->yres_virtual = var->yres;
1801                 if (!var->bits_per_pixel)
1802                         var->bits_per_pixel = 16;
1803         }
1804
1805         r = check_fb_var(fbi, var);
1806         if (r)
1807                 goto err;
1808
1809         set_fb_fix(fbi);
1810         r = setup_vrfb_rotation(fbi);
1811         if (r)
1812                 goto err;
1813
1814         r = fb_alloc_cmap(&fbi->cmap, 256, 0);
1815         if (r)
1816                 dev_err(fbdev->dev, "unable to allocate color map memory\n");
1817
1818 err:
1819         return r;
1820 }
1821
1822 static void fbinfo_cleanup(struct omapfb2_device *fbdev, struct fb_info *fbi)
1823 {
1824         fb_dealloc_cmap(&fbi->cmap);
1825 }
1826
1827
1828 static void omapfb_free_resources(struct omapfb2_device *fbdev)
1829 {
1830         int i;
1831
1832         DBG("free_resources\n");
1833
1834         if (fbdev == NULL)
1835                 return;
1836
1837         for (i = 0; i < fbdev->num_overlays; i++) {
1838                 struct omap_overlay *ovl = fbdev->overlays[i];
1839
1840                 ovl->disable(ovl);
1841
1842                 if (ovl->manager)
1843                         ovl->unset_manager(ovl);
1844         }
1845
1846         for (i = 0; i < fbdev->num_fbs; i++)
1847                 unregister_framebuffer(fbdev->fbs[i]);
1848
1849         /* free the reserved fbmem */
1850         omapfb_free_all_fbmem(fbdev);
1851
1852         for (i = 0; i < fbdev->num_fbs; i++) {
1853                 fbinfo_cleanup(fbdev, fbdev->fbs[i]);
1854                 framebuffer_release(fbdev->fbs[i]);
1855         }
1856
1857         for (i = 0; i < fbdev->num_displays; i++) {
1858                 struct omap_dss_device *dssdev = fbdev->displays[i].dssdev;
1859
1860                 if (fbdev->displays[i].auto_update_work_enabled)
1861                         omapfb_stop_auto_update(fbdev, dssdev);
1862
1863                 if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED)
1864                         dssdev->driver->disable(dssdev);
1865
1866                 dssdev->driver->disconnect(dssdev);
1867
1868                 omap_dss_put_device(dssdev);
1869         }
1870
1871         if (fbdev->auto_update_wq != NULL) {
1872                 flush_workqueue(fbdev->auto_update_wq);
1873                 destroy_workqueue(fbdev->auto_update_wq);
1874                 fbdev->auto_update_wq = NULL;
1875         }
1876
1877         dev_set_drvdata(fbdev->dev, NULL);
1878 }
1879
1880 static int omapfb_create_framebuffers(struct omapfb2_device *fbdev)
1881 {
1882         int r, i;
1883
1884         fbdev->num_fbs = 0;
1885
1886         DBG("create %d framebuffers\n", CONFIG_FB_OMAP2_NUM_FBS);
1887
1888         /* allocate fb_infos */
1889         for (i = 0; i < CONFIG_FB_OMAP2_NUM_FBS; i++) {
1890                 struct fb_info *fbi;
1891                 struct omapfb_info *ofbi;
1892
1893                 fbi = framebuffer_alloc(sizeof(struct omapfb_info),
1894                                 fbdev->dev);
1895
1896                 if (fbi == NULL) {
1897                         dev_err(fbdev->dev,
1898                                 "unable to allocate memory for plane info\n");
1899                         return -ENOMEM;
1900                 }
1901
1902                 clear_fb_info(fbi);
1903
1904                 fbdev->fbs[i] = fbi;
1905
1906                 ofbi = FB2OFB(fbi);
1907                 ofbi->fbdev = fbdev;
1908                 ofbi->id = i;
1909
1910                 ofbi->region = &fbdev->regions[i];
1911                 ofbi->region->id = i;
1912                 init_rwsem(&ofbi->region->lock);
1913
1914                 /* assign these early, so that fb alloc can use them */
1915                 ofbi->rotation_type = def_vrfb ? OMAP_DSS_ROT_VRFB :
1916                         OMAP_DSS_ROT_DMA;
1917                 ofbi->mirror = def_mirror;
1918
1919                 fbdev->num_fbs++;
1920         }
1921
1922         DBG("fb_infos allocated\n");
1923
1924         /* assign overlays for the fbs */
1925         for (i = 0; i < min(fbdev->num_fbs, fbdev->num_overlays); i++) {
1926                 struct omapfb_info *ofbi = FB2OFB(fbdev->fbs[i]);
1927
1928                 ofbi->overlays[0] = fbdev->overlays[i];
1929                 ofbi->num_overlays = 1;
1930         }
1931
1932         /* allocate fb memories */
1933         r = omapfb_allocate_all_fbs(fbdev);
1934         if (r) {
1935                 dev_err(fbdev->dev, "failed to allocate fbmem\n");
1936                 return r;
1937         }
1938
1939         DBG("fbmems allocated\n");
1940
1941         /* setup fb_infos */
1942         for (i = 0; i < fbdev->num_fbs; i++) {
1943                 struct fb_info *fbi = fbdev->fbs[i];
1944                 struct omapfb_info *ofbi = FB2OFB(fbi);
1945
1946                 omapfb_get_mem_region(ofbi->region);
1947                 r = omapfb_fb_init(fbdev, fbi);
1948                 omapfb_put_mem_region(ofbi->region);
1949
1950                 if (r) {
1951                         dev_err(fbdev->dev, "failed to setup fb_info\n");
1952                         return r;
1953                 }
1954         }
1955
1956         for (i = 0; i < fbdev->num_fbs; i++) {
1957                 struct fb_info *fbi = fbdev->fbs[i];
1958                 struct omapfb_info *ofbi = FB2OFB(fbi);
1959
1960                 if (ofbi->region->size == 0)
1961                         continue;
1962
1963                 omapfb_clear_fb(fbi);
1964         }
1965
1966         DBG("fb_infos initialized\n");
1967
1968         for (i = 0; i < fbdev->num_fbs; i++) {
1969                 r = register_framebuffer(fbdev->fbs[i]);
1970                 if (r != 0) {
1971                         dev_err(fbdev->dev,
1972                                 "registering framebuffer %d failed\n", i);
1973                         return r;
1974                 }
1975         }
1976
1977         DBG("framebuffers registered\n");
1978
1979         for (i = 0; i < fbdev->num_fbs; i++) {
1980                 struct fb_info *fbi = fbdev->fbs[i];
1981                 struct omapfb_info *ofbi = FB2OFB(fbi);
1982
1983                 omapfb_get_mem_region(ofbi->region);
1984                 r = omapfb_apply_changes(fbi, 1);
1985                 omapfb_put_mem_region(ofbi->region);
1986
1987                 if (r) {
1988                         dev_err(fbdev->dev, "failed to change mode\n");
1989                         return r;
1990                 }
1991         }
1992
1993         /* Enable fb0 */
1994         if (fbdev->num_fbs > 0) {
1995                 struct omapfb_info *ofbi = FB2OFB(fbdev->fbs[0]);
1996
1997                 if (ofbi->num_overlays > 0) {
1998                         struct omap_overlay *ovl = ofbi->overlays[0];
1999
2000                         ovl->manager->apply(ovl->manager);
2001
2002                         r = omapfb_overlay_enable(ovl, 1);
2003
2004                         if (r) {
2005                                 dev_err(fbdev->dev,
2006                                                 "failed to enable overlay\n");
2007                                 return r;
2008                         }
2009                 }
2010         }
2011
2012         DBG("create_framebuffers done\n");
2013
2014         return 0;
2015 }
2016
2017 static int omapfb_mode_to_timings(const char *mode_str,
2018                 struct omap_dss_device *display,
2019                 struct omap_video_timings *timings, u8 *bpp)
2020 {
2021         struct fb_info *fbi;
2022         struct fb_var_screeninfo *var;
2023         struct fb_ops *fbops;
2024         int r;
2025
2026 #ifdef CONFIG_OMAP2_DSS_VENC
2027         if (strcmp(mode_str, "pal") == 0) {
2028                 *timings = omap_dss_pal_timings;
2029                 *bpp = 24;
2030                 return 0;
2031         } else if (strcmp(mode_str, "ntsc") == 0) {
2032                 *timings = omap_dss_ntsc_timings;
2033                 *bpp = 24;
2034                 return 0;
2035         }
2036 #endif
2037
2038         /* this is quite a hack, but I wanted to use the modedb and for
2039          * that we need fb_info and var, so we create dummy ones */
2040
2041         *bpp = 0;
2042         fbi = NULL;
2043         var = NULL;
2044         fbops = NULL;
2045
2046         fbi = kzalloc(sizeof(*fbi), GFP_KERNEL);
2047         if (fbi == NULL) {
2048                 r = -ENOMEM;
2049                 goto err;
2050         }
2051
2052         var = kzalloc(sizeof(*var), GFP_KERNEL);
2053         if (var == NULL) {
2054                 r = -ENOMEM;
2055                 goto err;
2056         }
2057
2058         fbops = kzalloc(sizeof(*fbops), GFP_KERNEL);
2059         if (fbops == NULL) {
2060                 r = -ENOMEM;
2061                 goto err;
2062         }
2063
2064         fbi->fbops = fbops;
2065
2066         r = fb_find_mode(var, fbi, mode_str, NULL, 0, NULL, 24);
2067         if (r == 0) {
2068                 r = -EINVAL;
2069                 goto err;
2070         }
2071
2072         if (display->driver->get_timings) {
2073                 display->driver->get_timings(display, timings);
2074         } else {
2075                 timings->data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
2076                 timings->de_level = OMAPDSS_SIG_ACTIVE_HIGH;
2077                 timings->sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE;
2078         }
2079
2080         timings->pixelclock = PICOS2KHZ(var->pixclock) * 1000;
2081         timings->hbp = var->left_margin;
2082         timings->hfp = var->right_margin;
2083         timings->vbp = var->upper_margin;
2084         timings->vfp = var->lower_margin;
2085         timings->hsw = var->hsync_len;
2086         timings->vsw = var->vsync_len;
2087         timings->x_res = var->xres;
2088         timings->y_res = var->yres;
2089         timings->hsync_level = var->sync & FB_SYNC_HOR_HIGH_ACT ?
2090                                 OMAPDSS_SIG_ACTIVE_HIGH :
2091                                 OMAPDSS_SIG_ACTIVE_LOW;
2092         timings->vsync_level = var->sync & FB_SYNC_VERT_HIGH_ACT ?
2093                                 OMAPDSS_SIG_ACTIVE_HIGH :
2094                                 OMAPDSS_SIG_ACTIVE_LOW;
2095         timings->interlace = var->vmode & FB_VMODE_INTERLACED;
2096
2097         switch (var->bits_per_pixel) {
2098         case 16:
2099                 *bpp = 16;
2100                 break;
2101         case 24:
2102         case 32:
2103         default:
2104                 *bpp = 24;
2105                 break;
2106         }
2107
2108         r = 0;
2109
2110 err:
2111         kfree(fbi);
2112         kfree(var);
2113         kfree(fbops);
2114
2115         return r;
2116 }
2117
2118 static int omapfb_set_def_mode(struct omapfb2_device *fbdev,
2119                 struct omap_dss_device *display, char *mode_str)
2120 {
2121         int r;
2122         u8 bpp;
2123         struct omap_video_timings timings, temp_timings;
2124         struct omapfb_display_data *d;
2125
2126         r = omapfb_mode_to_timings(mode_str, display, &timings, &bpp);
2127         if (r)
2128                 return r;
2129
2130         d = get_display_data(fbdev, display);
2131         d->bpp_override = bpp;
2132
2133         if (display->driver->check_timings) {
2134                 r = display->driver->check_timings(display, &timings);
2135                 if (r)
2136                         return r;
2137         } else {
2138                 /* If check_timings is not present compare xres and yres */
2139                 if (display->driver->get_timings) {
2140                         display->driver->get_timings(display, &temp_timings);
2141
2142                         if (temp_timings.x_res != timings.x_res ||
2143                                 temp_timings.y_res != timings.y_res)
2144                                 return -EINVAL;
2145                 }
2146         }
2147
2148         if (display->driver->set_timings)
2149                         display->driver->set_timings(display, &timings);
2150
2151         return 0;
2152 }
2153
2154 static int omapfb_get_recommended_bpp(struct omapfb2_device *fbdev,
2155                 struct omap_dss_device *dssdev)
2156 {
2157         struct omapfb_display_data *d;
2158
2159         BUG_ON(dssdev->driver->get_recommended_bpp == NULL);
2160
2161         d = get_display_data(fbdev, dssdev);
2162
2163         if (d->bpp_override != 0)
2164                 return d->bpp_override;
2165
2166         return dssdev->driver->get_recommended_bpp(dssdev);
2167 }
2168
2169 static int omapfb_parse_def_modes(struct omapfb2_device *fbdev)
2170 {
2171         char *str, *options, *this_opt;
2172         int r = 0;
2173
2174         str = kstrdup(def_mode, GFP_KERNEL);
2175         if (!str)
2176                 return -ENOMEM;
2177         options = str;
2178
2179         while (!r && (this_opt = strsep(&options, ",")) != NULL) {
2180                 char *p, *display_str, *mode_str;
2181                 struct omap_dss_device *display;
2182                 int i;
2183
2184                 p = strchr(this_opt, ':');
2185                 if (!p) {
2186                         r = -EINVAL;
2187                         break;
2188                 }
2189
2190                 *p = 0;
2191                 display_str = this_opt;
2192                 mode_str = p + 1;
2193
2194                 display = NULL;
2195                 for (i = 0; i < fbdev->num_displays; ++i) {
2196                         if (strcmp(fbdev->displays[i].dssdev->name,
2197                                                 display_str) == 0) {
2198                                 display = fbdev->displays[i].dssdev;
2199                                 break;
2200                         }
2201                 }
2202
2203                 if (!display) {
2204                         r = -EINVAL;
2205                         break;
2206                 }
2207
2208                 r = omapfb_set_def_mode(fbdev, display, mode_str);
2209                 if (r)
2210                         break;
2211         }
2212
2213         kfree(str);
2214
2215         return r;
2216 }
2217
2218 static void fb_videomode_to_omap_timings(struct fb_videomode *m,
2219                 struct omap_dss_device *display,
2220                 struct omap_video_timings *t)
2221 {
2222         if (display->driver->get_timings) {
2223                 display->driver->get_timings(display, t);
2224         } else {
2225                 t->data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
2226                 t->de_level = OMAPDSS_SIG_ACTIVE_HIGH;
2227                 t->sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE;
2228         }
2229
2230         t->x_res = m->xres;
2231         t->y_res = m->yres;
2232         t->pixelclock = PICOS2KHZ(m->pixclock) * 1000;
2233         t->hsw = m->hsync_len;
2234         t->hfp = m->right_margin;
2235         t->hbp = m->left_margin;
2236         t->vsw = m->vsync_len;
2237         t->vfp = m->lower_margin;
2238         t->vbp = m->upper_margin;
2239         t->hsync_level = m->sync & FB_SYNC_HOR_HIGH_ACT ?
2240                                 OMAPDSS_SIG_ACTIVE_HIGH :
2241                                 OMAPDSS_SIG_ACTIVE_LOW;
2242         t->vsync_level = m->sync & FB_SYNC_VERT_HIGH_ACT ?
2243                                 OMAPDSS_SIG_ACTIVE_HIGH :
2244                                 OMAPDSS_SIG_ACTIVE_LOW;
2245         t->interlace = m->vmode & FB_VMODE_INTERLACED;
2246 }
2247
2248 static int omapfb_find_best_mode(struct omap_dss_device *display,
2249                 struct omap_video_timings *timings)
2250 {
2251         struct fb_monspecs *specs;
2252         u8 *edid;
2253         int r, i, best_idx, len;
2254
2255         if (!display->driver->read_edid)
2256                 return -ENODEV;
2257
2258         len = 0x80 * 2;
2259         edid = kmalloc(len, GFP_KERNEL);
2260         if (edid == NULL)
2261                 return -ENOMEM;
2262
2263         r = display->driver->read_edid(display, edid, len);
2264         if (r < 0)
2265                 goto err1;
2266
2267         specs = kzalloc(sizeof(*specs), GFP_KERNEL);
2268         if (specs == NULL) {
2269                 r = -ENOMEM;
2270                 goto err1;
2271         }
2272
2273         fb_edid_to_monspecs(edid, specs);
2274
2275         best_idx = -1;
2276
2277         for (i = 0; i < specs->modedb_len; ++i) {
2278                 struct fb_videomode *m;
2279                 struct omap_video_timings t;
2280
2281                 m = &specs->modedb[i];
2282
2283                 if (m->pixclock == 0)
2284                         continue;
2285
2286                 /* skip repeated pixel modes */
2287                 if (m->xres == 2880 || m->xres == 1440)
2288                         continue;
2289
2290                 if (m->vmode & FB_VMODE_INTERLACED ||
2291                                 m->vmode & FB_VMODE_DOUBLE)
2292                         continue;
2293
2294                 fb_videomode_to_omap_timings(m, display, &t);
2295
2296                 r = display->driver->check_timings(display, &t);
2297                 if (r == 0) {
2298                         best_idx = i;
2299                         break;
2300                 }
2301         }
2302
2303         if (best_idx == -1) {
2304                 r = -ENOENT;
2305                 goto err2;
2306         }
2307
2308         fb_videomode_to_omap_timings(&specs->modedb[best_idx], display,
2309                 timings);
2310
2311         r = 0;
2312
2313 err2:
2314         fb_destroy_modedb(specs->modedb);
2315         kfree(specs);
2316 err1:
2317         kfree(edid);
2318
2319         return r;
2320 }
2321
2322 static int omapfb_init_display(struct omapfb2_device *fbdev,
2323                 struct omap_dss_device *dssdev)
2324 {
2325         struct omap_dss_driver *dssdrv = dssdev->driver;
2326         struct omapfb_display_data *d;
2327         int r;
2328
2329         r = dssdrv->enable(dssdev);
2330         if (r) {
2331                 dev_warn(fbdev->dev, "Failed to enable display '%s'\n",
2332                                 dssdev->name);
2333                 return r;
2334         }
2335
2336         d = get_display_data(fbdev, dssdev);
2337
2338         d->fbdev = fbdev;
2339
2340         if (dssdev->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE) {
2341                 u16 w, h;
2342
2343                 if (auto_update) {
2344                         omapfb_start_auto_update(fbdev, dssdev);
2345                         d->update_mode = OMAPFB_AUTO_UPDATE;
2346                 } else {
2347                         d->update_mode = OMAPFB_MANUAL_UPDATE;
2348                 }
2349
2350                 if (dssdrv->enable_te) {
2351                         r = dssdrv->enable_te(dssdev, 1);
2352                         if (r) {
2353                                 dev_err(fbdev->dev, "Failed to set TE\n");
2354                                 return r;
2355                         }
2356                 }
2357
2358                 dssdrv->get_resolution(dssdev, &w, &h);
2359                 r = dssdrv->update(dssdev, 0, 0, w, h);
2360                 if (r) {
2361                         dev_err(fbdev->dev,
2362                                         "Failed to update display\n");
2363                         return r;
2364                 }
2365         } else {
2366                 d->update_mode = OMAPFB_AUTO_UPDATE;
2367         }
2368
2369         return 0;
2370 }
2371
2372 static int omapfb_init_connections(struct omapfb2_device *fbdev,
2373                 struct omap_dss_device *def_dssdev)
2374 {
2375         int i, r;
2376         struct omap_overlay_manager *mgr;
2377
2378         r = def_dssdev->driver->connect(def_dssdev);
2379         if (r) {
2380                 dev_err(fbdev->dev, "failed to connect default display\n");
2381                 return r;
2382         }
2383
2384         for (i = 0; i < fbdev->num_displays; ++i) {
2385                 struct omap_dss_device *dssdev = fbdev->displays[i].dssdev;
2386
2387                 if (dssdev == def_dssdev)
2388                         continue;
2389
2390                 /*
2391                  * We don't care if the connect succeeds or not. We just want to
2392                  * connect as many displays as possible.
2393                  */
2394                 dssdev->driver->connect(dssdev);
2395         }
2396
2397         mgr = omapdss_find_mgr_from_display(def_dssdev);
2398
2399         if (!mgr) {
2400                 dev_err(fbdev->dev, "no ovl manager for the default display\n");
2401                 return -EINVAL;
2402         }
2403
2404         for (i = 0; i < fbdev->num_overlays; i++) {
2405                 struct omap_overlay *ovl = fbdev->overlays[i];
2406
2407                 if (ovl->manager)
2408                         ovl->unset_manager(ovl);
2409
2410                 r = ovl->set_manager(ovl, mgr);
2411                 if (r)
2412                         dev_warn(fbdev->dev,
2413                                         "failed to connect overlay %s to manager %s\n",
2414                                         ovl->name, mgr->name);
2415         }
2416
2417         return 0;
2418 }
2419
2420 static struct omap_dss_device *
2421 omapfb_find_default_display(struct omapfb2_device *fbdev)
2422 {
2423         const char *def_name;
2424         int i;
2425
2426         /*
2427          * Search with the display name from the user or the board file,
2428          * comparing to display names and aliases
2429          */
2430
2431         def_name = omapdss_get_default_display_name();
2432
2433         if (def_name) {
2434                 for (i = 0; i < fbdev->num_displays; ++i) {
2435                         struct omap_dss_device *dssdev;
2436
2437                         dssdev = fbdev->displays[i].dssdev;
2438
2439                         if (dssdev->name && strcmp(def_name, dssdev->name) == 0)
2440                                 return dssdev;
2441
2442                         if (strcmp(def_name, dssdev->alias) == 0)
2443                                 return dssdev;
2444                 }
2445
2446                 /* def_name given but not found */
2447                 return NULL;
2448         }
2449
2450         /* then look for DT alias display0 */
2451         for (i = 0; i < fbdev->num_displays; ++i) {
2452                 struct omap_dss_device *dssdev;
2453                 int id;
2454
2455                 dssdev = fbdev->displays[i].dssdev;
2456
2457                 if (dssdev->dev->of_node == NULL)
2458                         continue;
2459
2460                 id = of_alias_get_id(dssdev->dev->of_node, "display");
2461                 if (id == 0)
2462                         return dssdev;
2463         }
2464
2465         /* return the first display we have in the list */
2466         return fbdev->displays[0].dssdev;
2467 }
2468
2469 static int omapfb_probe(struct platform_device *pdev)
2470 {
2471         struct omapfb2_device *fbdev = NULL;
2472         int r = 0;
2473         int i;
2474         struct omap_dss_device *def_display;
2475         struct omap_dss_device *dssdev;
2476
2477         DBG("omapfb_probe\n");
2478
2479         if (omapdss_is_initialized() == false)
2480                 return -EPROBE_DEFER;
2481
2482         if (pdev->num_resources != 0) {
2483                 dev_err(&pdev->dev, "probed for an unknown device\n");
2484                 r = -ENODEV;
2485                 goto err0;
2486         }
2487
2488         fbdev = devm_kzalloc(&pdev->dev, sizeof(struct omapfb2_device),
2489                         GFP_KERNEL);
2490         if (fbdev == NULL) {
2491                 r = -ENOMEM;
2492                 goto err0;
2493         }
2494
2495         if (def_vrfb && !omap_vrfb_supported()) {
2496                 def_vrfb = 0;
2497                 dev_warn(&pdev->dev, "VRFB is not supported on this hardware, "
2498                                 "ignoring the module parameter vrfb=y\n");
2499         }
2500
2501         r = omapdss_compat_init();
2502         if (r)
2503                 goto err0;
2504
2505         mutex_init(&fbdev->mtx);
2506
2507         fbdev->dev = &pdev->dev;
2508         platform_set_drvdata(pdev, fbdev);
2509
2510         fbdev->num_displays = 0;
2511         dssdev = NULL;
2512         for_each_dss_dev(dssdev) {
2513                 struct omapfb_display_data *d;
2514
2515                 omap_dss_get_device(dssdev);
2516
2517                 if (!dssdev->driver) {
2518                         dev_warn(&pdev->dev, "no driver for display: %s\n",
2519                                 dssdev->name);
2520                         omap_dss_put_device(dssdev);
2521                         continue;
2522                 }
2523
2524                 d = &fbdev->displays[fbdev->num_displays++];
2525                 d->dssdev = dssdev;
2526                 if (dssdev->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE)
2527                         d->update_mode = OMAPFB_MANUAL_UPDATE;
2528                 else
2529                         d->update_mode = OMAPFB_AUTO_UPDATE;
2530         }
2531
2532         if (fbdev->num_displays == 0) {
2533                 dev_err(&pdev->dev, "no displays\n");
2534                 r = -EPROBE_DEFER;
2535                 goto cleanup;
2536         }
2537
2538         fbdev->num_overlays = omap_dss_get_num_overlays();
2539         for (i = 0; i < fbdev->num_overlays; i++)
2540                 fbdev->overlays[i] = omap_dss_get_overlay(i);
2541
2542         fbdev->num_managers = omap_dss_get_num_overlay_managers();
2543         for (i = 0; i < fbdev->num_managers; i++)
2544                 fbdev->managers[i] = omap_dss_get_overlay_manager(i);
2545
2546         def_display = omapfb_find_default_display(fbdev);
2547         if (def_display == NULL) {
2548                 dev_err(fbdev->dev, "failed to find default display\n");
2549                 r = -EPROBE_DEFER;
2550                 goto cleanup;
2551         }
2552
2553         r = omapfb_init_connections(fbdev, def_display);
2554         if (r) {
2555                 dev_err(fbdev->dev, "failed to init overlay connections\n");
2556                 goto cleanup;
2557         }
2558
2559         if (def_mode && strlen(def_mode) > 0) {
2560                 if (omapfb_parse_def_modes(fbdev))
2561                         dev_warn(&pdev->dev, "cannot parse default modes\n");
2562         } else if (def_display && def_display->driver->set_timings &&
2563                         def_display->driver->check_timings) {
2564                 struct omap_video_timings t;
2565
2566                 r = omapfb_find_best_mode(def_display, &t);
2567
2568                 if (r == 0)
2569                         def_display->driver->set_timings(def_display, &t);
2570         }
2571
2572         r = omapfb_create_framebuffers(fbdev);
2573         if (r)
2574                 goto cleanup;
2575
2576         for (i = 0; i < fbdev->num_managers; i++) {
2577                 struct omap_overlay_manager *mgr;
2578                 mgr = fbdev->managers[i];
2579                 r = mgr->apply(mgr);
2580                 if (r)
2581                         dev_warn(fbdev->dev, "failed to apply dispc config\n");
2582         }
2583
2584         DBG("mgr->apply'ed\n");
2585
2586         if (def_display) {
2587                 r = omapfb_init_display(fbdev, def_display);
2588                 if (r) {
2589                         dev_err(fbdev->dev,
2590                                         "failed to initialize default "
2591                                         "display\n");
2592                         goto cleanup;
2593                 }
2594         }
2595
2596         DBG("create sysfs for fbs\n");
2597         r = omapfb_create_sysfs(fbdev);
2598         if (r) {
2599                 dev_err(fbdev->dev, "failed to create sysfs entries\n");
2600                 goto cleanup;
2601         }
2602
2603         if (def_display) {
2604                 u16 w, h;
2605
2606                 def_display->driver->get_resolution(def_display, &w, &h);
2607
2608                 dev_info(fbdev->dev, "using display '%s' mode %dx%d\n",
2609                         def_display->name, w, h);
2610         }
2611
2612         return 0;
2613
2614 cleanup:
2615         omapfb_free_resources(fbdev);
2616         omapdss_compat_uninit();
2617 err0:
2618         dev_err(&pdev->dev, "failed to setup omapfb\n");
2619         return r;
2620 }
2621
2622 static int omapfb_remove(struct platform_device *pdev)
2623 {
2624         struct omapfb2_device *fbdev = platform_get_drvdata(pdev);
2625
2626         /* FIXME: wait till completion of pending events */
2627
2628         omapfb_remove_sysfs(fbdev);
2629
2630         omapfb_free_resources(fbdev);
2631
2632         omapdss_compat_uninit();
2633
2634         return 0;
2635 }
2636
2637 static struct platform_driver omapfb_driver = {
2638         .probe          = omapfb_probe,
2639         .remove         = omapfb_remove,
2640         .driver         = {
2641                 .name   = "omapfb",
2642         },
2643 };
2644
2645 module_param_named(mode, def_mode, charp, 0);
2646 module_param_named(vram, def_vram, charp, 0);
2647 module_param_named(rotate, def_rotate, int, 0);
2648 module_param_named(vrfb, def_vrfb, bool, 0);
2649 module_param_named(mirror, def_mirror, bool, 0);
2650
2651 module_platform_driver(omapfb_driver);
2652
2653 MODULE_ALIAS("platform:omapfb");
2654 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@nokia.com>");
2655 MODULE_DESCRIPTION("OMAP2/3 Framebuffer");
2656 MODULE_LICENSE("GPL v2");