drivers/video/imx/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 <asm/mach-imx/video.h>
  21 #include <malloc.h>
  22 #include <video_fb.h>
  23 #include "../videomodes.h"
  24 #include "ipu.h"
  25 #include "mxcfb.h"
  26 #include "ipu_regs.h"
  27
  28 #include <dm.h>
  29 #include <video.h>
  30
  31 DECLARE_GLOBAL_DATA_PTR;
  32
  33 static int mxcfb_map_video_memory(struct fb_info *fbi);
  34 static int mxcfb_unmap_video_memory(struct fb_info *fbi);
  35
  36 /* graphics setup */
  37 static GraphicDevice panel;
  38 static struct fb_videomode const *gmode;
  39 static uint8_t gdisp;
  40 static uint32_t gpixfmt;
  41
  42 static void fb_videomode_to_var(struct fb_var_screeninfo *var,
  43                          const struct fb_videomode *mode)
  44 {
  45         var->xres = mode->xres;
  46         var->yres = mode->yres;
  47         var->xres_virtual = mode->xres;
  48         var->yres_virtual = mode->yres;
  49         var->xoffset = 0;
  50         var->yoffset = 0;
  51         var->pixclock = mode->pixclock;
  52         var->left_margin = mode->left_margin;
  53         var->right_margin = mode->right_margin;
  54         var->upper_margin = mode->upper_margin;
  55         var->lower_margin = mode->lower_margin;
  56         var->hsync_len = mode->hsync_len;
  57         var->vsync_len = mode->vsync_len;
  58         var->sync = mode->sync;
  59         var->vmode = mode->vmode & FB_VMODE_MASK;
  60 }
  61
  62 /*
  63  * Structure containing the MXC specific framebuffer information.
  64  */
  65 struct mxcfb_info {
  66         int blank;
  67         ipu_channel_t ipu_ch;
  68         int ipu_di;
  69         u32 ipu_di_pix_fmt;
  70         unsigned char overlay;
  71         unsigned char alpha_chan_en;
  72         dma_addr_t alpha_phy_addr0;
  73         dma_addr_t alpha_phy_addr1;
  74         void *alpha_virt_addr0;
  75         void *alpha_virt_addr1;
  76         uint32_t alpha_mem_len;
  77         uint32_t cur_ipu_buf;
  78         uint32_t cur_ipu_alpha_buf;
  79
  80         u32 pseudo_palette[16];
  81 };
  82
  83 enum {
  84         BOTH_ON,
  85         SRC_ON,
  86         TGT_ON,
  87         BOTH_OFF
  88 };
  89
  90 static unsigned long default_bpp = 16;
  91 static unsigned char g_dp_in_use;
  92 static struct fb_info *mxcfb_info[3];
  93 static int ext_clk_used;
  94
  95 static uint32_t bpp_to_pixfmt(struct fb_info *fbi)
  96 {
  97         uint32_t pixfmt = 0;
  98
  99         debug("bpp_to_pixfmt: %d\n", fbi->var.bits_per_pixel);
 100
 101         if (fbi->var.nonstd)
 102                 return fbi->var.nonstd;
 103
 104         switch (fbi->var.bits_per_pixel) {
 105         case 24:
 106                 pixfmt = IPU_PIX_FMT_BGR24;
 107                 break;
 108         case 32:
 109                 pixfmt = IPU_PIX_FMT_BGR32;
 110                 break;
 111         case 16:
 112                 pixfmt = IPU_PIX_FMT_RGB565;
 113                 break;
 114         }
 115         return pixfmt;
 116 }
 117
 118 /*
 119  * Set fixed framebuffer parameters based on variable settings.
 120  *
 121  * @param       info     framebuffer information pointer
 122  */
 123 static int mxcfb_set_fix(struct fb_info *info)
 124 {
 125         struct fb_fix_screeninfo *fix = &info->fix;
 126         struct fb_var_screeninfo *var = &info->var;
 127
 128         fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
 129
 130         fix->type = FB_TYPE_PACKED_PIXELS;
 131         fix->accel = FB_ACCEL_NONE;
 132         fix->visual = FB_VISUAL_TRUECOLOR;
 133         fix->xpanstep = 1;
 134         fix->ypanstep = 1;
 135
 136         return 0;
 137 }
 138
 139 static int setup_disp_channel1(struct fb_info *fbi)
 140 {
 141         ipu_channel_params_t params;
 142         struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
 143
 144         memset(&params, 0, sizeof(params));
 145         params.mem_dp_bg_sync.di = mxc_fbi->ipu_di;
 146
 147         debug("%s called\n", __func__);
 148         /*
 149          * Assuming interlaced means yuv output, below setting also
 150          * valid for mem_dc_sync. FG should have the same vmode as BG.
 151          */
 152         if (fbi->var.vmode & FB_VMODE_INTERLACED) {
 153                 params.mem_dp_bg_sync.interlaced = 1;
 154                 params.mem_dp_bg_sync.out_pixel_fmt =
 155                         IPU_PIX_FMT_YUV444;
 156         } else {
 157                 if (mxc_fbi->ipu_di_pix_fmt) {
 158                         params.mem_dp_bg_sync.out_pixel_fmt =
 159                                 mxc_fbi->ipu_di_pix_fmt;
 160                 } else {
 161                         params.mem_dp_bg_sync.out_pixel_fmt =
 162                                 IPU_PIX_FMT_RGB666;
 163                 }
 164         }
 165         params.mem_dp_bg_sync.in_pixel_fmt = bpp_to_pixfmt(fbi);
 166         if (mxc_fbi->alpha_chan_en)
 167                 params.mem_dp_bg_sync.alpha_chan_en = 1;
 168
 169         ipu_init_channel(mxc_fbi->ipu_ch, &params);
 170
 171         return 0;
 172 }
 173
 174 static int setup_disp_channel2(struct fb_info *fbi)
 175 {
 176         int retval = 0;
 177         struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
 178
 179         mxc_fbi->cur_ipu_buf = 1;
 180         if (mxc_fbi->alpha_chan_en)
 181                 mxc_fbi->cur_ipu_alpha_buf = 1;
 182
 183         fbi->var.xoffset = fbi->var.yoffset = 0;
 184
 185         debug("%s: %x %d %d %d %lx %lx\n",
 186                 __func__,
 187                 mxc_fbi->ipu_ch,
 188                 fbi->var.xres,
 189                 fbi->var.yres,
 190                 fbi->fix.line_length,
 191                 fbi->fix.smem_start,
 192                 fbi->fix.smem_start +
 193                 (fbi->fix.line_length * fbi->var.yres));
 194
 195         retval = ipu_init_channel_buffer(mxc_fbi->ipu_ch, IPU_INPUT_BUFFER,
 196                                          bpp_to_pixfmt(fbi),
 197                                          fbi->var.xres, fbi->var.yres,
 198                                          fbi->fix.line_length,
 199                                          fbi->fix.smem_start +
 200                                          (fbi->fix.line_length * fbi->var.yres),
 201                                          fbi->fix.smem_start,
 202                                          0, 0);
 203         if (retval)
 204                 printf("ipu_init_channel_buffer error %d\n", retval);
 205
 206         return retval;
 207 }
 208
 209 /*
 210  * Set framebuffer parameters and change the operating mode.
 211  *
 212  * @param       info     framebuffer information pointer
 213  */
 214 static int mxcfb_set_par(struct fb_info *fbi)
 215 {
 216         int retval = 0;
 217         u32 mem_len;
 218         ipu_di_signal_cfg_t sig_cfg;
 219         struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
 220         uint32_t out_pixel_fmt;
 221
 222         ipu_disable_channel(mxc_fbi->ipu_ch);
 223         ipu_uninit_channel(mxc_fbi->ipu_ch);
 224         mxcfb_set_fix(fbi);
 225
 226         mem_len = fbi->var.yres_virtual * fbi->fix.line_length;
 227         if (!fbi->fix.smem_start || (mem_len > fbi->fix.smem_len)) {
 228                 if (fbi->fix.smem_start)
 229                         mxcfb_unmap_video_memory(fbi);
 230
 231                 if (mxcfb_map_video_memory(fbi) < 0)
 232                         return -ENOMEM;
 233         }
 234
 235         setup_disp_channel1(fbi);
 236
 237         memset(&sig_cfg, 0, sizeof(sig_cfg));
 238         if (fbi->var.vmode & FB_VMODE_INTERLACED) {
 239                 sig_cfg.interlaced = 1;
 240                 out_pixel_fmt = IPU_PIX_FMT_YUV444;
 241         } else {
 242                 if (mxc_fbi->ipu_di_pix_fmt)
 243                         out_pixel_fmt = mxc_fbi->ipu_di_pix_fmt;
 244                 else
 245                         out_pixel_fmt = IPU_PIX_FMT_RGB666;
 246         }
 247         if (fbi->var.vmode & FB_VMODE_ODD_FLD_FIRST) /* PAL */
 248                 sig_cfg.odd_field_first = 1;
 249         if ((fbi->var.sync & FB_SYNC_EXT) || ext_clk_used)
 250                 sig_cfg.ext_clk = 1;
 251         if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT)
 252                 sig_cfg.Hsync_pol = 1;
 253         if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT)
 254                 sig_cfg.Vsync_pol = 1;
 255         if (!(fbi->var.sync & FB_SYNC_CLK_LAT_FALL))
 256                 sig_cfg.clk_pol = 1;
 257         if (fbi->var.sync & FB_SYNC_DATA_INVERT)
 258                 sig_cfg.data_pol = 1;
 259         if (!(fbi->var.sync & FB_SYNC_OE_LOW_ACT))
 260                 sig_cfg.enable_pol = 1;
 261         if (fbi->var.sync & FB_SYNC_CLK_IDLE_EN)
 262                 sig_cfg.clkidle_en = 1;
 263
 264         debug("pixclock = %lu Hz\n", PICOS2KHZ(fbi->var.pixclock) * 1000UL);
 265
 266         if (ipu_init_sync_panel(mxc_fbi->ipu_di,
 267                                 (PICOS2KHZ(fbi->var.pixclock)) * 1000UL,
 268                                 fbi->var.xres, fbi->var.yres,
 269                                 out_pixel_fmt,
 270                                 fbi->var.left_margin,
 271                                 fbi->var.hsync_len,
 272                                 fbi->var.right_margin,
 273                                 fbi->var.upper_margin,
 274                                 fbi->var.vsync_len,
 275                                 fbi->var.lower_margin,
 276                                 0, sig_cfg) != 0) {
 277                 puts("mxcfb: Error initializing panel.\n");
 278                 return -EINVAL;
 279         }
 280
 281         retval = setup_disp_channel2(fbi);
 282         if (retval)
 283                 return retval;
 284
 285         if (mxc_fbi->blank == FB_BLANK_UNBLANK)
 286                 ipu_enable_channel(mxc_fbi->ipu_ch);
 287
 288         return retval;
 289 }
 290
 291 /*
 292  * Check framebuffer variable parameters and adjust to valid values.
 293  *
 294  * @param       var      framebuffer variable parameters
 295  *
 296  * @param       info     framebuffer information pointer
 297  */
 298 static int mxcfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 299 {
 300         u32 vtotal;
 301         u32 htotal;
 302
 303         if (var->xres_virtual < var->xres)
 304                 var->xres_virtual = var->xres;
 305         if (var->yres_virtual < var->yres)
 306                 var->yres_virtual = var->yres;
 307
 308         if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
 309             (var->bits_per_pixel != 16) && (var->bits_per_pixel != 8))
 310                 var->bits_per_pixel = default_bpp;
 311
 312         switch (var->bits_per_pixel) {
 313         case 8:
 314                 var->red.length = 3;
 315                 var->red.offset = 5;
 316                 var->red.msb_right = 0;
 317
 318                 var->green.length = 3;
 319                 var->green.offset = 2;
 320                 var->green.msb_right = 0;
 321
 322                 var->blue.length = 2;
 323                 var->blue.offset = 0;
 324                 var->blue.msb_right = 0;
 325
 326                 var->transp.length = 0;
 327                 var->transp.offset = 0;
 328                 var->transp.msb_right = 0;
 329                 break;
 330         case 16:
 331                 var->red.length = 5;
 332                 var->red.offset = 11;
 333                 var->red.msb_right = 0;
 334
 335                 var->green.length = 6;
 336                 var->green.offset = 5;
 337                 var->green.msb_right = 0;
 338
 339                 var->blue.length = 5;
 340                 var->blue.offset = 0;
 341                 var->blue.msb_right = 0;
 342
 343                 var->transp.length = 0;
 344                 var->transp.offset = 0;
 345                 var->transp.msb_right = 0;
 346                 break;
 347         case 24:
 348                 var->red.length = 8;
 349                 var->red.offset = 16;
 350                 var->red.msb_right = 0;
 351
 352                 var->green.length = 8;
 353                 var->green.offset = 8;
 354                 var->green.msb_right = 0;
 355
 356                 var->blue.length = 8;
 357                 var->blue.offset = 0;
 358                 var->blue.msb_right = 0;
 359
 360                 var->transp.length = 0;
 361                 var->transp.offset = 0;
 362                 var->transp.msb_right = 0;
 363                 break;
 364         case 32:
 365                 var->red.length = 8;
 366                 var->red.offset = 16;
 367                 var->red.msb_right = 0;
 368
 369                 var->green.length = 8;
 370                 var->green.offset = 8;
 371                 var->green.msb_right = 0;
 372
 373                 var->blue.length = 8;
 374                 var->blue.offset = 0;
 375                 var->blue.msb_right = 0;
 376
 377                 var->transp.length = 8;
 378                 var->transp.offset = 24;
 379                 var->transp.msb_right = 0;
 380                 break;
 381         }
 382
 383         if (var->pixclock < 1000) {
 384                 htotal = var->xres + var->right_margin + var->hsync_len +
 385                     var->left_margin;
 386                 vtotal = var->yres + var->lower_margin + var->vsync_len +
 387                     var->upper_margin;
 388                 var->pixclock = (vtotal * htotal * 6UL) / 100UL;
 389                 var->pixclock = KHZ2PICOS(var->pixclock);
 390                 printf("pixclock set for 60Hz refresh = %u ps\n",
 391                         var->pixclock);
 392         }
 393
 394         var->height = -1;
 395         var->width = -1;
 396         var->grayscale = 0;
 397
 398         return 0;
 399 }
 400
 401 static int mxcfb_map_video_memory(struct fb_info *fbi)
 402 {
 403         if (fbi->fix.smem_len < fbi->var.yres_virtual * fbi->fix.line_length) {
 404                 fbi->fix.smem_len = fbi->var.yres_virtual *
 405                                     fbi->fix.line_length;
 406         }
 407         fbi->fix.smem_len = roundup(fbi->fix.smem_len, ARCH_DMA_MINALIGN);
 408
 409 #if CONFIG_IS_ENABLED(DM_VIDEO)
 410         fbi->screen_base = (char *)gd->video_bottom;
 411 #else
 412         fbi->screen_base = (char *)memalign(ARCH_DMA_MINALIGN,
 413                                             fbi->fix.smem_len);
 414 #endif
 415
 416         fbi->fix.smem_start = (unsigned long)fbi->screen_base;
 417         if (fbi->screen_base == 0) {
 418                 puts("Unable to allocate framebuffer memory\n");
 419                 fbi->fix.smem_len = 0;
 420                 fbi->fix.smem_start = 0;
 421                 return -EBUSY;
 422         }
 423
 424         debug("allocated fb @ paddr=0x%08X, size=%d.\n",
 425                 (uint32_t) fbi->fix.smem_start, fbi->fix.smem_len);
 426
 427         fbi->screen_size = fbi->fix.smem_len;
 428
 429 #if CONFIG_IS_ENABLED(VIDEO)
 430         gd->fb_base = fbi->fix.smem_start;
 431 #endif
 432
 433         /* Clear the screen */
 434         memset((char *)fbi->screen_base, 0, fbi->fix.smem_len);
 435
 436         return 0;
 437 }
 438
 439 static int mxcfb_unmap_video_memory(struct fb_info *fbi)
 440 {
 441         fbi->screen_base = 0;
 442         fbi->fix.smem_start = 0;
 443         fbi->fix.smem_len = 0;
 444         return 0;
 445 }
 446
 447 /*
 448  * Initializes the framebuffer information pointer. After allocating
 449  * sufficient memory for the framebuffer structure, the fields are
 450  * filled with custom information passed in from the configurable
 451  * structures.  This includes information such as bits per pixel,
 452  * color maps, screen width/height and RGBA offsets.
 453  *
 454  * @return      Framebuffer structure initialized with our information
 455  */
 456 static struct fb_info *mxcfb_init_fbinfo(void)
 457 {
 458 #define BYTES_PER_LONG 4
 459 #define PADDING (BYTES_PER_LONG - (sizeof(struct fb_info) % BYTES_PER_LONG))
 460         struct fb_info *fbi;
 461         struct mxcfb_info *mxcfbi;
 462         char *p;
 463         int size = sizeof(struct mxcfb_info) + PADDING +
 464                 sizeof(struct fb_info);
 465
 466         debug("%s: %d %d %d %d\n",
 467                 __func__,
 468                 PADDING,
 469                 size,
 470                 sizeof(struct mxcfb_info),
 471                 sizeof(struct fb_info));
 472         /*
 473          * Allocate sufficient memory for the fb structure
 474          */
 475
 476         p = malloc(size);
 477         if (!p)
 478                 return NULL;
 479
 480         memset(p, 0, size);
 481
 482         fbi = (struct fb_info *)p;
 483         fbi->par = p + sizeof(struct fb_info) + PADDING;
 484
 485         mxcfbi = (struct mxcfb_info *)fbi->par;
 486         debug("Framebuffer structures at: fbi=0x%x mxcfbi=0x%x\n",
 487                 (unsigned int)fbi, (unsigned int)mxcfbi);
 488
 489         fbi->var.activate = FB_ACTIVATE_NOW;
 490
 491         fbi->flags = FBINFO_FLAG_DEFAULT;
 492         fbi->pseudo_palette = mxcfbi->pseudo_palette;
 493
 494         return fbi;
 495 }
 496
 497 /*
 498  * Probe routine for the framebuffer driver. It is called during the
 499  * driver binding process. The following functions are performed in
 500  * this routine: Framebuffer initialization, Memory allocation and
 501  * mapping, Framebuffer registration, IPU initialization.
 502  *
 503  * @return      Appropriate error code to the kernel common code
 504  */
 505 static int mxcfb_probe(u32 interface_pix_fmt, uint8_t disp,
 506                         struct fb_videomode const *mode)
 507 {
 508         struct fb_info *fbi;
 509         struct mxcfb_info *mxcfbi;
 510         int ret = 0;
 511
 512         /*
 513          * Initialize FB structures
 514          */
 515         fbi = mxcfb_init_fbinfo();
 516         if (!fbi) {
 517                 ret = -ENOMEM;
 518                 goto err0;
 519         }
 520         mxcfbi = (struct mxcfb_info *)fbi->par;
 521
 522         if (!g_dp_in_use) {
 523                 mxcfbi->ipu_ch = MEM_BG_SYNC;
 524                 mxcfbi->blank = FB_BLANK_UNBLANK;
 525         } else {
 526                 mxcfbi->ipu_ch = MEM_DC_SYNC;
 527                 mxcfbi->blank = FB_BLANK_POWERDOWN;
 528         }
 529
 530         mxcfbi->ipu_di = disp;
 531
 532         ipu_disp_set_global_alpha(mxcfbi->ipu_ch, 1, 0x80);
 533         ipu_disp_set_color_key(mxcfbi->ipu_ch, 0, 0);
 534         strcpy(fbi->fix.id, "DISP3 BG");
 535
 536         g_dp_in_use = 1;
 537
 538         mxcfb_info[mxcfbi->ipu_di] = fbi;
 539
 540         /* Need dummy values until real panel is configured */
 541
 542         mxcfbi->ipu_di_pix_fmt = interface_pix_fmt;
 543         fb_videomode_to_var(&fbi->var, mode);
 544         fbi->var.bits_per_pixel = 16;
 545         fbi->fix.line_length = fbi->var.xres * (fbi->var.bits_per_pixel / 8);
 546         fbi->fix.smem_len = fbi->var.yres_virtual * fbi->fix.line_length;
 547
 548         mxcfb_check_var(&fbi->var, fbi);
 549
 550         /* Default Y virtual size is 2x panel size */
 551         fbi->var.yres_virtual = fbi->var.yres * 2;
 552
 553         mxcfb_set_fix(fbi);
 554
 555         /* allocate fb first */
 556         if (mxcfb_map_video_memory(fbi) < 0)
 557                 return -ENOMEM;
 558
 559         mxcfb_set_par(fbi);
 560
 561         panel.winSizeX = mode->xres;
 562         panel.winSizeY = mode->yres;
 563         panel.plnSizeX = mode->xres;
 564         panel.plnSizeY = mode->yres;
 565
 566         panel.frameAdrs = (u32)fbi->screen_base;
 567         panel.memSize = fbi->screen_size;
 568
 569         panel.gdfBytesPP = 2;
 570         panel.gdfIndex = GDF_16BIT_565RGB;
 571
 572         ipu_dump_registers();
 573
 574         return 0;
 575
 576 err0:
 577         return ret;
 578 }
 579
 580 void ipuv3_fb_shutdown(void)
 581 {
 582         int i;
 583         struct ipu_stat *stat = (struct ipu_stat *)IPU_STAT;
 584
 585         if (!ipu_clk_enabled())
 586                 return;
 587
 588         for (i = 0; i < ARRAY_SIZE(mxcfb_info); i++) {
 589                 struct fb_info *fbi = mxcfb_info[i];
 590                 if (fbi) {
 591                         struct mxcfb_info *mxc_fbi = fbi->par;
 592                         ipu_disable_channel(mxc_fbi->ipu_ch);
 593                         ipu_uninit_channel(mxc_fbi->ipu_ch);
 594                 }
 595         }
 596         for (i = 0; i < ARRAY_SIZE(stat->int_stat); i++) {
 597                 __raw_writel(__raw_readl(&stat->int_stat[i]),
 598                              &stat->int_stat[i]);
 599         }
 600 }
 601
 602 void *video_hw_init(void)
 603 {
 604         int ret;
 605
 606         ret = ipu_probe();
 607         if (ret)
 608                 puts("Error initializing IPU\n");
 609
 610         ret = mxcfb_probe(gpixfmt, gdisp, gmode);
 611         debug("Framebuffer at 0x%x\n", (unsigned int)panel.frameAdrs);
 612
 613         return (void *)&panel;
 614 }
 615
 616 int ipuv3_fb_init(struct fb_videomode const *mode,
 617                   uint8_t disp,
 618                   uint32_t pixfmt)
 619 {
 620         gmode = mode;
 621         gdisp = disp;
 622         gpixfmt = pixfmt;
 623
 624         return 0;
 625 }
 626
 627 #if CONFIG_IS_ENABLED(DM_VIDEO)
 628 enum {
 629         /* Maximum display size we support */
 630         LCD_MAX_WIDTH           = 1920,
 631         LCD_MAX_HEIGHT          = 1080,
 632         LCD_MAX_LOG2_BPP        = VIDEO_BPP16,
 633 };
 634
 635 static int ipuv3_video_probe(struct udevice *dev)
 636 {
 637         struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);
 638         struct video_priv *uc_priv = dev_get_uclass_priv(dev);
 639         u32 fb_start, fb_end;
 640         int ret;
 641
 642         debug("%s() plat: base 0x%lx, size 0x%x\n",
 643               __func__, plat->base, plat->size);
 644
 645         ret = ipu_probe();
 646         if (ret)
 647                 return ret;
 648
 649         ret = ipu_displays_init();
 650         if (ret < 0)
 651                 return ret;
 652
 653         ret = mxcfb_probe(gpixfmt, gdisp, gmode);
 654         if (ret < 0)
 655                 return ret;
 656
 657         uc_priv->xsize = gmode->xres;
 658         uc_priv->ysize = gmode->yres;
 659         uc_priv->bpix = LCD_MAX_LOG2_BPP;
 660
 661         /* Enable dcache for the frame buffer */
 662         fb_start = plat->base & ~(MMU_SECTION_SIZE - 1);
 663         fb_end = plat->base + plat->size;
 664         fb_end = ALIGN(fb_end, 1 << MMU_SECTION_SHIFT);
 665         mmu_set_region_dcache_behaviour(fb_start, fb_end - fb_start,
 666                                         DCACHE_WRITEBACK);
 667         video_set_flush_dcache(dev, true);
 668
 669         return 0;
 670 }
 671
 672 struct ipuv3_video_priv {
 673         ulong regs;
 674 };
 675
 676 static int ipuv3_video_bind(struct udevice *dev)
 677 {
 678         struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);
 679
 680         plat->size = LCD_MAX_WIDTH * LCD_MAX_HEIGHT *
 681                      (1 << LCD_MAX_LOG2_BPP) / 8;
 682
 683         return 0;
 684 }
 685
 686 static const struct udevice_id ipuv3_video_ids[] = {
 687         { .compatible = "fsl,imx6q-ipu" },
 688         { }
 689 };
 690
 691 U_BOOT_DRIVER(ipuv3_video) = {
 692         .name   = "ipuv3_video",
 693         .id     = UCLASS_VIDEO,
 694         .of_match = ipuv3_video_ids,
 695         .bind   = ipuv3_video_bind,
 696         .probe  = ipuv3_video_probe,
 697         .priv_auto_alloc_size = sizeof(struct ipuv3_video_priv),
 698         .flags  = DM_FLAG_PRE_RELOC,
 699 };
 700 #endif /* CONFIG_DM_VIDEO */