drivers/video/mxc_ipuv3_fb.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Porting to u-boot:
   4  *
   5  * (C) Copyright 2010
   6  * Stefano Babic, DENX Software Engineering, sbabic@denx.de
   7  *
   8  * MX51 Linux framebuffer:
   9  *
  10  * (C) Copyright 2004-2010 Freescale Semiconductor, Inc.
  11  */
  12
  13 #include <common.h>
  14 #include <linux/errno.h>
  15 #include <asm/global_data.h>
  16 #include <linux/string.h>
  17 #include <linux/list.h>
  18 #include <linux/fb.h>
  19 #include <asm/io.h>
  20 #include <malloc.h>
  21 #include <video_fb.h>
  22 #include "videomodes.h"
  23 #include "ipu.h"
  24 #include "mxcfb.h"
  25 #include "ipu_regs.h"
  26
  27 DECLARE_GLOBAL_DATA_PTR;
  28
  29 static int mxcfb_map_video_memory(struct fb_info *fbi);
  30 static int mxcfb_unmap_video_memory(struct fb_info *fbi);
  31
  32 /* graphics setup */
  33 static GraphicDevice panel;
  34 static struct fb_videomode const *gmode;
  35 static uint8_t gdisp;
  36 static uint32_t gpixfmt;
  37
  38 static void fb_videomode_to_var(struct fb_var_screeninfo *var,
  39                          const struct fb_videomode *mode)
  40 {
  41         var->xres = mode->xres;
  42         var->yres = mode->yres;
  43         var->xres_virtual = mode->xres;
  44         var->yres_virtual = mode->yres;
  45         var->xoffset = 0;
  46         var->yoffset = 0;
  47         var->pixclock = mode->pixclock;
  48         var->left_margin = mode->left_margin;
  49         var->right_margin = mode->right_margin;
  50         var->upper_margin = mode->upper_margin;
  51         var->lower_margin = mode->lower_margin;
  52         var->hsync_len = mode->hsync_len;
  53         var->vsync_len = mode->vsync_len;
  54         var->sync = mode->sync;
  55         var->vmode = mode->vmode & FB_VMODE_MASK;
  56 }
  57
  58 /*
  59  * Structure containing the MXC specific framebuffer information.
  60  */
  61 struct mxcfb_info {
  62         int blank;
  63         ipu_channel_t ipu_ch;
  64         int ipu_di;
  65         u32 ipu_di_pix_fmt;
  66         unsigned char overlay;
  67         unsigned char alpha_chan_en;
  68         dma_addr_t alpha_phy_addr0;
  69         dma_addr_t alpha_phy_addr1;
  70         void *alpha_virt_addr0;
  71         void *alpha_virt_addr1;
  72         uint32_t alpha_mem_len;
  73         uint32_t cur_ipu_buf;
  74         uint32_t cur_ipu_alpha_buf;
  75
  76         u32 pseudo_palette[16];
  77 };
  78
  79 enum {
  80         BOTH_ON,
  81         SRC_ON,
  82         TGT_ON,
  83         BOTH_OFF
  84 };
  85
  86 static unsigned long default_bpp = 16;
  87 static unsigned char g_dp_in_use;
  88 static struct fb_info *mxcfb_info[3];
  89 static int ext_clk_used;
  90
  91 static uint32_t bpp_to_pixfmt(struct fb_info *fbi)
  92 {
  93         uint32_t pixfmt = 0;
  94
  95         debug("bpp_to_pixfmt: %d\n", fbi->var.bits_per_pixel);
  96
  97         if (fbi->var.nonstd)
  98                 return fbi->var.nonstd;
  99
 100         switch (fbi->var.bits_per_pixel) {
 101         case 24:
 102                 pixfmt = IPU_PIX_FMT_BGR24;
 103                 break;
 104         case 32:
 105                 pixfmt = IPU_PIX_FMT_BGR32;
 106                 break;
 107         case 16:
 108                 pixfmt = IPU_PIX_FMT_RGB565;
 109                 break;
 110         }
 111         return pixfmt;
 112 }
 113
 114 /*
 115  * Set fixed framebuffer parameters based on variable settings.
 116  *
 117  * @param       info     framebuffer information pointer
 118  */
 119 static int mxcfb_set_fix(struct fb_info *info)
 120 {
 121         struct fb_fix_screeninfo *fix = &info->fix;
 122         struct fb_var_screeninfo *var = &info->var;
 123
 124         fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
 125
 126         fix->type = FB_TYPE_PACKED_PIXELS;
 127         fix->accel = FB_ACCEL_NONE;
 128         fix->visual = FB_VISUAL_TRUECOLOR;
 129         fix->xpanstep = 1;
 130         fix->ypanstep = 1;
 131
 132         return 0;
 133 }
 134
 135 static int setup_disp_channel1(struct fb_info *fbi)
 136 {
 137         ipu_channel_params_t params;
 138         struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
 139
 140         memset(&params, 0, sizeof(params));
 141         params.mem_dp_bg_sync.di = mxc_fbi->ipu_di;
 142
 143         debug("%s called\n", __func__);
 144         /*
 145          * Assuming interlaced means yuv output, below setting also
 146          * valid for mem_dc_sync. FG should have the same vmode as BG.
 147          */
 148         if (fbi->var.vmode & FB_VMODE_INTERLACED) {
 149                 params.mem_dp_bg_sync.interlaced = 1;
 150                 params.mem_dp_bg_sync.out_pixel_fmt =
 151                         IPU_PIX_FMT_YUV444;
 152         } else {
 153                 if (mxc_fbi->ipu_di_pix_fmt) {
 154                         params.mem_dp_bg_sync.out_pixel_fmt =
 155                                 mxc_fbi->ipu_di_pix_fmt;
 156                 } else {
 157                         params.mem_dp_bg_sync.out_pixel_fmt =
 158                                 IPU_PIX_FMT_RGB666;
 159                 }
 160         }
 161         params.mem_dp_bg_sync.in_pixel_fmt = bpp_to_pixfmt(fbi);
 162         if (mxc_fbi->alpha_chan_en)
 163                 params.mem_dp_bg_sync.alpha_chan_en = 1;
 164
 165         ipu_init_channel(mxc_fbi->ipu_ch, &params);
 166
 167         return 0;
 168 }
 169
 170 static int setup_disp_channel2(struct fb_info *fbi)
 171 {
 172         int retval = 0;
 173         struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
 174
 175         mxc_fbi->cur_ipu_buf = 1;
 176         if (mxc_fbi->alpha_chan_en)
 177                 mxc_fbi->cur_ipu_alpha_buf = 1;
 178
 179         fbi->var.xoffset = fbi->var.yoffset = 0;
 180
 181         debug("%s: %x %d %d %d %lx %lx\n",
 182                 __func__,
 183                 mxc_fbi->ipu_ch,
 184                 fbi->var.xres,
 185                 fbi->var.yres,
 186                 fbi->fix.line_length,
 187                 fbi->fix.smem_start,
 188                 fbi->fix.smem_start +
 189                 (fbi->fix.line_length * fbi->var.yres));
 190
 191         retval = ipu_init_channel_buffer(mxc_fbi->ipu_ch, IPU_INPUT_BUFFER,
 192                                          bpp_to_pixfmt(fbi),
 193                                          fbi->var.xres, fbi->var.yres,
 194                                          fbi->fix.line_length,
 195                                          fbi->fix.smem_start +
 196                                          (fbi->fix.line_length * fbi->var.yres),
 197                                          fbi->fix.smem_start,
 198                                          0, 0);
 199         if (retval)
 200                 printf("ipu_init_channel_buffer error %d\n", retval);
 201
 202         return retval;
 203 }
 204
 205 /*
 206  * Set framebuffer parameters and change the operating mode.
 207  *
 208  * @param       info     framebuffer information pointer
 209  */
 210 static int mxcfb_set_par(struct fb_info *fbi)
 211 {
 212         int retval = 0;
 213         u32 mem_len;
 214         ipu_di_signal_cfg_t sig_cfg;
 215         struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
 216         uint32_t out_pixel_fmt;
 217
 218         ipu_disable_channel(mxc_fbi->ipu_ch);
 219         ipu_uninit_channel(mxc_fbi->ipu_ch);
 220         mxcfb_set_fix(fbi);
 221
 222         mem_len = fbi->var.yres_virtual * fbi->fix.line_length;
 223         if (!fbi->fix.smem_start || (mem_len > fbi->fix.smem_len)) {
 224                 if (fbi->fix.smem_start)
 225                         mxcfb_unmap_video_memory(fbi);
 226
 227                 if (mxcfb_map_video_memory(fbi) < 0)
 228                         return -ENOMEM;
 229         }
 230
 231         setup_disp_channel1(fbi);
 232
 233         memset(&sig_cfg, 0, sizeof(sig_cfg));
 234         if (fbi->var.vmode & FB_VMODE_INTERLACED) {
 235                 sig_cfg.interlaced = 1;
 236                 out_pixel_fmt = IPU_PIX_FMT_YUV444;
 237         } else {
 238                 if (mxc_fbi->ipu_di_pix_fmt)
 239                         out_pixel_fmt = mxc_fbi->ipu_di_pix_fmt;
 240                 else
 241                         out_pixel_fmt = IPU_PIX_FMT_RGB666;
 242         }
 243         if (fbi->var.vmode & FB_VMODE_ODD_FLD_FIRST) /* PAL */
 244                 sig_cfg.odd_field_first = 1;
 245         if ((fbi->var.sync & FB_SYNC_EXT) || ext_clk_used)
 246                 sig_cfg.ext_clk = 1;
 247         if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT)
 248                 sig_cfg.Hsync_pol = 1;
 249         if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT)
 250                 sig_cfg.Vsync_pol = 1;
 251         if (!(fbi->var.sync & FB_SYNC_CLK_LAT_FALL))
 252                 sig_cfg.clk_pol = 1;
 253         if (fbi->var.sync & FB_SYNC_DATA_INVERT)
 254                 sig_cfg.data_pol = 1;
 255         if (!(fbi->var.sync & FB_SYNC_OE_LOW_ACT))
 256                 sig_cfg.enable_pol = 1;
 257         if (fbi->var.sync & FB_SYNC_CLK_IDLE_EN)
 258                 sig_cfg.clkidle_en = 1;
 259
 260         debug("pixclock = %lu Hz\n", PICOS2KHZ(fbi->var.pixclock) * 1000UL);
 261
 262         if (ipu_init_sync_panel(mxc_fbi->ipu_di,
 263                                 (PICOS2KHZ(fbi->var.pixclock)) * 1000UL,
 264                                 fbi->var.xres, fbi->var.yres,
 265                                 out_pixel_fmt,
 266                                 fbi->var.left_margin,
 267                                 fbi->var.hsync_len,
 268                                 fbi->var.right_margin,
 269                                 fbi->var.upper_margin,
 270                                 fbi->var.vsync_len,
 271                                 fbi->var.lower_margin,
 272                                 0, sig_cfg) != 0) {
 273                 puts("mxcfb: Error initializing panel.\n");
 274                 return -EINVAL;
 275         }
 276
 277         retval = setup_disp_channel2(fbi);
 278         if (retval)
 279                 return retval;
 280
 281         if (mxc_fbi->blank == FB_BLANK_UNBLANK)
 282                 ipu_enable_channel(mxc_fbi->ipu_ch);
 283
 284         return retval;
 285 }
 286
 287 /*
 288  * Check framebuffer variable parameters and adjust to valid values.
 289  *
 290  * @param       var      framebuffer variable parameters
 291  *
 292  * @param       info     framebuffer information pointer
 293  */
 294 static int mxcfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 295 {
 296         u32 vtotal;
 297         u32 htotal;
 298
 299         if (var->xres_virtual < var->xres)
 300                 var->xres_virtual = var->xres;
 301         if (var->yres_virtual < var->yres)
 302                 var->yres_virtual = var->yres;
 303
 304         if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
 305             (var->bits_per_pixel != 16) && (var->bits_per_pixel != 8))
 306                 var->bits_per_pixel = default_bpp;
 307
 308         switch (var->bits_per_pixel) {
 309         case 8:
 310                 var->red.length = 3;
 311                 var->red.offset = 5;
 312                 var->red.msb_right = 0;
 313
 314                 var->green.length = 3;
 315                 var->green.offset = 2;
 316                 var->green.msb_right = 0;
 317
 318                 var->blue.length = 2;
 319                 var->blue.offset = 0;
 320                 var->blue.msb_right = 0;
 321
 322                 var->transp.length = 0;
 323                 var->transp.offset = 0;
 324                 var->transp.msb_right = 0;
 325                 break;
 326         case 16:
 327                 var->red.length = 5;
 328                 var->red.offset = 11;
 329                 var->red.msb_right = 0;
 330
 331                 var->green.length = 6;
 332                 var->green.offset = 5;
 333                 var->green.msb_right = 0;
 334
 335                 var->blue.length = 5;
 336                 var->blue.offset = 0;
 337                 var->blue.msb_right = 0;
 338
 339                 var->transp.length = 0;
 340                 var->transp.offset = 0;
 341                 var->transp.msb_right = 0;
 342                 break;
 343         case 24:
 344                 var->red.length = 8;
 345                 var->red.offset = 16;
 346                 var->red.msb_right = 0;
 347
 348                 var->green.length = 8;
 349                 var->green.offset = 8;
 350                 var->green.msb_right = 0;
 351
 352                 var->blue.length = 8;
 353                 var->blue.offset = 0;
 354                 var->blue.msb_right = 0;
 355
 356                 var->transp.length = 0;
 357                 var->transp.offset = 0;
 358                 var->transp.msb_right = 0;
 359                 break;
 360         case 32:
 361                 var->red.length = 8;
 362                 var->red.offset = 16;
 363                 var->red.msb_right = 0;
 364
 365                 var->green.length = 8;
 366                 var->green.offset = 8;
 367                 var->green.msb_right = 0;
 368
 369                 var->blue.length = 8;
 370                 var->blue.offset = 0;
 371                 var->blue.msb_right = 0;
 372
 373                 var->transp.length = 8;
 374                 var->transp.offset = 24;
 375                 var->transp.msb_right = 0;
 376                 break;
 377         }
 378
 379         if (var->pixclock < 1000) {
 380                 htotal = var->xres + var->right_margin + var->hsync_len +
 381                     var->left_margin;
 382                 vtotal = var->yres + var->lower_margin + var->vsync_len +
 383                     var->upper_margin;
 384                 var->pixclock = (vtotal * htotal * 6UL) / 100UL;
 385                 var->pixclock = KHZ2PICOS(var->pixclock);
 386                 printf("pixclock set for 60Hz refresh = %u ps\n",
 387                         var->pixclock);
 388         }
 389
 390         var->height = -1;
 391         var->width = -1;
 392         var->grayscale = 0;
 393
 394         return 0;
 395 }
 396
 397 static int mxcfb_map_video_memory(struct fb_info *fbi)
 398 {
 399         if (fbi->fix.smem_len < fbi->var.yres_virtual * fbi->fix.line_length) {
 400                 fbi->fix.smem_len = fbi->var.yres_virtual *
 401                                     fbi->fix.line_length;
 402         }
 403         fbi->fix.smem_len = roundup(fbi->fix.smem_len, ARCH_DMA_MINALIGN);
 404         fbi->screen_base = (char *)memalign(ARCH_DMA_MINALIGN,
 405                                             fbi->fix.smem_len);
 406         fbi->fix.smem_start = (unsigned long)fbi->screen_base;
 407         if (fbi->screen_base == 0) {
 408                 puts("Unable to allocate framebuffer memory\n");
 409                 fbi->fix.smem_len = 0;
 410                 fbi->fix.smem_start = 0;
 411                 return -EBUSY;
 412         }
 413
 414         debug("allocated fb @ paddr=0x%08X, size=%d.\n",
 415                 (uint32_t) fbi->fix.smem_start, fbi->fix.smem_len);
 416
 417         fbi->screen_size = fbi->fix.smem_len;
 418
 419         gd->fb_base = fbi->fix.smem_start;
 420
 421         /* Clear the screen */
 422         memset((char *)fbi->screen_base, 0, fbi->fix.smem_len);
 423
 424         return 0;
 425 }
 426
 427 static int mxcfb_unmap_video_memory(struct fb_info *fbi)
 428 {
 429         fbi->screen_base = 0;
 430         fbi->fix.smem_start = 0;
 431         fbi->fix.smem_len = 0;
 432         return 0;
 433 }
 434
 435 /*
 436  * Initializes the framebuffer information pointer. After allocating
 437  * sufficient memory for the framebuffer structure, the fields are
 438  * filled with custom information passed in from the configurable
 439  * structures.  This includes information such as bits per pixel,
 440  * color maps, screen width/height and RGBA offsets.
 441  *
 442  * @return      Framebuffer structure initialized with our information
 443  */
 444 static struct fb_info *mxcfb_init_fbinfo(void)
 445 {
 446 #define BYTES_PER_LONG 4
 447 #define PADDING (BYTES_PER_LONG - (sizeof(struct fb_info) % BYTES_PER_LONG))
 448         struct fb_info *fbi;
 449         struct mxcfb_info *mxcfbi;
 450         char *p;
 451         int size = sizeof(struct mxcfb_info) + PADDING +
 452                 sizeof(struct fb_info);
 453
 454         debug("%s: %d %d %d %d\n",
 455                 __func__,
 456                 PADDING,
 457                 size,
 458                 sizeof(struct mxcfb_info),
 459                 sizeof(struct fb_info));
 460         /*
 461          * Allocate sufficient memory for the fb structure
 462          */
 463
 464         p = malloc(size);
 465         if (!p)
 466                 return NULL;
 467
 468         memset(p, 0, size);
 469
 470         fbi = (struct fb_info *)p;
 471         fbi->par = p + sizeof(struct fb_info) + PADDING;
 472
 473         mxcfbi = (struct mxcfb_info *)fbi->par;
 474         debug("Framebuffer structures at: fbi=0x%x mxcfbi=0x%x\n",
 475                 (unsigned int)fbi, (unsigned int)mxcfbi);
 476
 477         fbi->var.activate = FB_ACTIVATE_NOW;
 478
 479         fbi->flags = FBINFO_FLAG_DEFAULT;
 480         fbi->pseudo_palette = mxcfbi->pseudo_palette;
 481
 482         return fbi;
 483 }
 484
 485 /*
 486  * Probe routine for the framebuffer driver. It is called during the
 487  * driver binding process. The following functions are performed in
 488  * this routine: Framebuffer initialization, Memory allocation and
 489  * mapping, Framebuffer registration, IPU initialization.
 490  *
 491  * @return      Appropriate error code to the kernel common code
 492  */
 493 static int mxcfb_probe(u32 interface_pix_fmt, uint8_t disp,
 494                         struct fb_videomode const *mode)
 495 {
 496         struct fb_info *fbi;
 497         struct mxcfb_info *mxcfbi;
 498         int ret = 0;
 499
 500         /*
 501          * Initialize FB structures
 502          */
 503         fbi = mxcfb_init_fbinfo();
 504         if (!fbi) {
 505                 ret = -ENOMEM;
 506                 goto err0;
 507         }
 508         mxcfbi = (struct mxcfb_info *)fbi->par;
 509
 510         if (!g_dp_in_use) {
 511                 mxcfbi->ipu_ch = MEM_BG_SYNC;
 512                 mxcfbi->blank = FB_BLANK_UNBLANK;
 513         } else {
 514                 mxcfbi->ipu_ch = MEM_DC_SYNC;
 515                 mxcfbi->blank = FB_BLANK_POWERDOWN;
 516         }
 517
 518         mxcfbi->ipu_di = disp;
 519
 520         ipu_disp_set_global_alpha(mxcfbi->ipu_ch, 1, 0x80);
 521         ipu_disp_set_color_key(mxcfbi->ipu_ch, 0, 0);
 522         strcpy(fbi->fix.id, "DISP3 BG");
 523
 524         g_dp_in_use = 1;
 525
 526         mxcfb_info[mxcfbi->ipu_di] = fbi;
 527
 528         /* Need dummy values until real panel is configured */
 529
 530         mxcfbi->ipu_di_pix_fmt = interface_pix_fmt;
 531         fb_videomode_to_var(&fbi->var, mode);
 532         fbi->var.bits_per_pixel = 16;
 533         fbi->fix.line_length = fbi->var.xres * (fbi->var.bits_per_pixel / 8);
 534         fbi->fix.smem_len = fbi->var.yres_virtual * fbi->fix.line_length;
 535
 536         mxcfb_check_var(&fbi->var, fbi);
 537
 538         /* Default Y virtual size is 2x panel size */
 539         fbi->var.yres_virtual = fbi->var.yres * 2;
 540
 541         mxcfb_set_fix(fbi);
 542
 543         /* allocate fb first */
 544         if (mxcfb_map_video_memory(fbi) < 0)
 545                 return -ENOMEM;
 546
 547         mxcfb_set_par(fbi);
 548
 549         panel.winSizeX = mode->xres;
 550         panel.winSizeY = mode->yres;
 551         panel.plnSizeX = mode->xres;
 552         panel.plnSizeY = mode->yres;
 553
 554         panel.frameAdrs = (u32)fbi->screen_base;
 555         panel.memSize = fbi->screen_size;
 556
 557         panel.gdfBytesPP = 2;
 558         panel.gdfIndex = GDF_16BIT_565RGB;
 559
 560         ipu_dump_registers();
 561
 562         return 0;
 563
 564 err0:
 565         return ret;
 566 }
 567
 568 void ipuv3_fb_shutdown(void)
 569 {
 570         int i;
 571         struct ipu_stat *stat = (struct ipu_stat *)IPU_STAT;
 572
 573         if (!ipu_clk_enabled())
 574                 return;
 575
 576         for (i = 0; i < ARRAY_SIZE(mxcfb_info); i++) {
 577                 struct fb_info *fbi = mxcfb_info[i];
 578                 if (fbi) {
 579                         struct mxcfb_info *mxc_fbi = fbi->par;
 580                         ipu_disable_channel(mxc_fbi->ipu_ch);
 581                         ipu_uninit_channel(mxc_fbi->ipu_ch);
 582                 }
 583         }
 584         for (i = 0; i < ARRAY_SIZE(stat->int_stat); i++) {
 585                 __raw_writel(__raw_readl(&stat->int_stat[i]),
 586                              &stat->int_stat[i]);
 587         }
 588 }
 589
 590 void *video_hw_init(void)
 591 {
 592         int ret;
 593
 594         ret = ipu_probe();
 595         if (ret)
 596                 puts("Error initializing IPU\n");
 597
 598         ret = mxcfb_probe(gpixfmt, gdisp, gmode);
 599         debug("Framebuffer at 0x%x\n", (unsigned int)panel.frameAdrs);
 600
 601         return (void *)&panel;
 602 }
 603
 604 int ipuv3_fb_init(struct fb_videomode const *mode,
 605                   uint8_t disp,
 606                   uint32_t pixfmt)
 607 {
 608         gmode = mode;
 609         gdisp = disp;
 610         gpixfmt = pixfmt;
 611
 612         return 0;
 613 }