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, [email protected]
   7  *
   8  * MX51 Linux framebuffer:
   9  *
  10  * (C) Copyright 2004-2010 Freescale Semiconductor, Inc.
  11  */
  12
  13 #include <common.h>
  14 #include <log.h>
  15 #include <part.h>
  16 #include <asm/cache.h>
  17 #include <linux/errno.h>
  18 #include <asm/global_data.h>
  19 #include <linux/string.h>
  20 #include <linux/list.h>
  21 #include <linux/fb.h>
  22 #include <asm/io.h>
  23 #include <asm/mach-imx/video.h>
  24 #include <malloc.h>
  25 #include <video_fb.h>
  26 #include "../videomodes.h"
  27 #include "ipu.h"
  28 #include "mxcfb.h"
  29 #include "ipu_regs.h"
  30 #include "display.h"
  31 #include <panel.h>
  32
  33 #include <dm.h>
  34 #include <video.h>
  35
  36 DECLARE_GLOBAL_DATA_PTR;
  37
  38 static int mxcfb_map_video_memory(struct fb_info *fbi);
  39 static int mxcfb_unmap_video_memory(struct fb_info *fbi);
  40
  41 /* graphics setup */
  42 static GraphicDevice panel;
  43 static struct fb_videomode const *gmode;
  44 static uint8_t gdisp;
  45 static uint32_t gpixfmt;
  46
  47 static void fb_videomode_to_var(struct fb_var_screeninfo *var,
  48                          const struct fb_videomode *mode)
  49 {
  50         var->xres = mode->xres;
  51         var->yres = mode->yres;
  52         var->xres_virtual = mode->xres;
  53         var->yres_virtual = mode->yres;
  54         var->xoffset = 0;
  55         var->yoffset = 0;
  56         var->pixclock = mode->pixclock;
  57         var->left_margin = mode->left_margin;
  58         var->right_margin = mode->right_margin;
  59         var->upper_margin = mode->upper_margin;
  60         var->lower_margin = mode->lower_margin;
  61         var->hsync_len = mode->hsync_len;
  62         var->vsync_len = mode->vsync_len;
  63         var->sync = mode->sync;
  64         var->vmode = mode->vmode & FB_VMODE_MASK;
  65 }
  66
  67 /*
  68  * Structure containing the MXC specific framebuffer information.
  69  */
  70 struct mxcfb_info {
  71         int blank;
  72         ipu_channel_t ipu_ch;
  73         int ipu_di;
  74         u32 ipu_di_pix_fmt;
  75         unsigned char overlay;
  76         unsigned char alpha_chan_en;
  77         dma_addr_t alpha_phy_addr0;
  78         dma_addr_t alpha_phy_addr1;
  79         void *alpha_virt_addr0;
  80         void *alpha_virt_addr1;
  81         uint32_t alpha_mem_len;
  82         uint32_t cur_ipu_buf;
  83         uint32_t cur_ipu_alpha_buf;
  84
  85         u32 pseudo_palette[16];
  86 };
  87
  88 enum {
  89         BOTH_ON,
  90         SRC_ON,
  91         TGT_ON,
  92         BOTH_OFF
  93 };
  94
  95 static unsigned long default_bpp = 16;
  96 static unsigned char g_dp_in_use;
  97 static struct fb_info *mxcfb_info[3];
  98 static int ext_clk_used;
  99
 100 static uint32_t bpp_to_pixfmt(struct fb_info *fbi)
 101 {
 102         uint32_t pixfmt = 0;
 103
 104         debug("bpp_to_pixfmt: %d\n", fbi->var.bits_per_pixel);
 105
 106         if (fbi->var.nonstd)
 107                 return fbi->var.nonstd;
 108
 109         switch (fbi->var.bits_per_pixel) {
 110         case 24:
 111                 pixfmt = IPU_PIX_FMT_BGR24;
 112                 break;
 113         case 32:
 114                 pixfmt = IPU_PIX_FMT_BGR32;
 115                 break;
 116         case 16:
 117                 pixfmt = IPU_PIX_FMT_RGB565;
 118                 break;
 119         }
 120         return pixfmt;
 121 }
 122
 123 /*
 124  * Set fixed framebuffer parameters based on variable settings.
 125  *
 126  * @param       info     framebuffer information pointer
 127  */
 128 static int mxcfb_set_fix(struct fb_info *info)
 129 {
 130         struct fb_fix_screeninfo *fix = &info->fix;
 131         struct fb_var_screeninfo *var = &info->var;
 132
 133         fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
 134
 135         fix->type = FB_TYPE_PACKED_PIXELS;
 136         fix->accel = FB_ACCEL_NONE;
 137         fix->visual = FB_VISUAL_TRUECOLOR;
 138         fix->xpanstep = 1;
 139         fix->ypanstep = 1;
 140
 141         return 0;
 142 }
 143
 144 static int setup_disp_channel1(struct fb_info *fbi)
 145 {
 146         ipu_channel_params_t params;
 147         struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
 148
 149         memset(&params, 0, sizeof(params));
 150         params.mem_dp_bg_sync.di = mxc_fbi->ipu_di;
 151
 152         debug("%s called\n", __func__);
 153         /*
 154          * Assuming interlaced means yuv output, below setting also
 155          * valid for mem_dc_sync. FG should have the same vmode as BG.
 156          */
 157         if (fbi->var.vmode & FB_VMODE_INTERLACED) {
 158                 params.mem_dp_bg_sync.interlaced = 1;
 159                 params.mem_dp_bg_sync.out_pixel_fmt =
 160                         IPU_PIX_FMT_YUV444;
 161         } else {
 162                 if (mxc_fbi->ipu_di_pix_fmt) {
 163                         params.mem_dp_bg_sync.out_pixel_fmt =
 164                                 mxc_fbi->ipu_di_pix_fmt;
 165                 } else {
 166                         params.mem_dp_bg_sync.out_pixel_fmt =
 167                                 IPU_PIX_FMT_RGB666;
 168                 }
 169         }
 170         params.mem_dp_bg_sync.in_pixel_fmt = bpp_to_pixfmt(fbi);
 171         if (mxc_fbi->alpha_chan_en)
 172                 params.mem_dp_bg_sync.alpha_chan_en = 1;
 173
 174         ipu_init_channel(mxc_fbi->ipu_ch, &params);
 175
 176         return 0;
 177 }
 178
 179 static int setup_disp_channel2(struct fb_info *fbi)
 180 {
 181         int retval = 0;
 182         struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
 183
 184         mxc_fbi->cur_ipu_buf = 1;
 185         if (mxc_fbi->alpha_chan_en)
 186                 mxc_fbi->cur_ipu_alpha_buf = 1;
 187
 188         fbi->var.xoffset = fbi->var.yoffset = 0;
 189
 190         debug("%s: %x %d %d %d %lx %lx\n",
 191                 __func__,
 192                 mxc_fbi->ipu_ch,
 193                 fbi->var.xres,
 194                 fbi->var.yres,
 195                 fbi->fix.line_length,
 196                 fbi->fix.smem_start,
 197                 fbi->fix.smem_start +
 198                 (fbi->fix.line_length * fbi->var.yres));
 199
 200         retval = ipu_init_channel_buffer(mxc_fbi->ipu_ch, IPU_INPUT_BUFFER,
 201                                          bpp_to_pixfmt(fbi),
 202                                          fbi->var.xres, fbi->var.yres,
 203                                          fbi->fix.line_length,
 204                                          fbi->fix.smem_start +
 205                                          (fbi->fix.line_length * fbi->var.yres),
 206                                          fbi->fix.smem_start,
 207                                          0, 0);
 208         if (retval)
 209                 printf("ipu_init_channel_buffer error %d\n", retval);
 210
 211         return retval;
 212 }
 213
 214 /*
 215  * Set framebuffer parameters and change the operating mode.
 216  *
 217  * @param       info     framebuffer information pointer
 218  */
 219 static int mxcfb_set_par(struct fb_info *fbi)
 220 {
 221         int retval = 0;
 222         u32 mem_len;
 223         ipu_di_signal_cfg_t sig_cfg;
 224         struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
 225         uint32_t out_pixel_fmt;
 226
 227         ipu_disable_channel(mxc_fbi->ipu_ch);
 228         ipu_uninit_channel(mxc_fbi->ipu_ch);
 229         mxcfb_set_fix(fbi);
 230
 231         mem_len = fbi->var.yres_virtual * fbi->fix.line_length;
 232         if (!fbi->fix.smem_start || (mem_len > fbi->fix.smem_len)) {
 233                 if (fbi->fix.smem_start)
 234                         mxcfb_unmap_video_memory(fbi);
 235
 236                 if (mxcfb_map_video_memory(fbi) < 0)
 237                         return -ENOMEM;
 238         }
 239
 240         setup_disp_channel1(fbi);
 241
 242         memset(&sig_cfg, 0, sizeof(sig_cfg));
 243         if (fbi->var.vmode & FB_VMODE_INTERLACED) {
 244                 sig_cfg.interlaced = 1;
 245                 out_pixel_fmt = IPU_PIX_FMT_YUV444;
 246         } else {
 247                 if (mxc_fbi->ipu_di_pix_fmt)
 248                         out_pixel_fmt = mxc_fbi->ipu_di_pix_fmt;
 249                 else
 250                         out_pixel_fmt = IPU_PIX_FMT_RGB666;
 251         }
 252         if (fbi->var.vmode & FB_VMODE_ODD_FLD_FIRST) /* PAL */
 253                 sig_cfg.odd_field_first = 1;
 254         if ((fbi->var.sync & FB_SYNC_EXT) || ext_clk_used)
 255                 sig_cfg.ext_clk = 1;
 256         if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT)
 257                 sig_cfg.Hsync_pol = 1;
 258         if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT)
 259                 sig_cfg.Vsync_pol = 1;
 260         if (!(fbi->var.sync & FB_SYNC_CLK_LAT_FALL))
 261                 sig_cfg.clk_pol = 1;
 262         if (fbi->var.sync & FB_SYNC_DATA_INVERT)
 263                 sig_cfg.data_pol = 1;
 264         if (!(fbi->var.sync & FB_SYNC_OE_LOW_ACT))
 265                 sig_cfg.enable_pol = 1;
 266         if (fbi->var.sync & FB_SYNC_CLK_IDLE_EN)
 267                 sig_cfg.clkidle_en = 1;
 268
 269         debug("pixclock = %lu Hz\n", PICOS2KHZ(fbi->var.pixclock) * 1000UL);
 270
 271         if (ipu_init_sync_panel(mxc_fbi->ipu_di,
 272                                 (PICOS2KHZ(fbi->var.pixclock)) * 1000UL,
 273                                 fbi->var.xres, fbi->var.yres,
 274                                 out_pixel_fmt,
 275                                 fbi->var.left_margin,
 276                                 fbi->var.hsync_len,
 277                                 fbi->var.right_margin,
 278                                 fbi->var.upper_margin,
 279                                 fbi->var.vsync_len,
 280                                 fbi->var.lower_margin,
 281                                 0, sig_cfg) != 0) {
 282                 puts("mxcfb: Error initializing panel.\n");
 283                 return -EINVAL;
 284         }
 285
 286         retval = setup_disp_channel2(fbi);
 287         if (retval)
 288                 return retval;
 289
 290         if (mxc_fbi->blank == FB_BLANK_UNBLANK)
 291                 ipu_enable_channel(mxc_fbi->ipu_ch);
 292
 293         return retval;
 294 }
 295
 296 /*
 297  * Check framebuffer variable parameters and adjust to valid values.
 298  *
 299  * @param       var      framebuffer variable parameters
 300  *
 301  * @param       info     framebuffer information pointer
 302  */
 303 static int mxcfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 304 {
 305         u32 vtotal;
 306         u32 htotal;
 307
 308         if (var->xres_virtual < var->xres)
 309                 var->xres_virtual = var->xres;
 310         if (var->yres_virtual < var->yres)
 311                 var->yres_virtual = var->yres;
 312
 313         if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
 314             (var->bits_per_pixel != 16) && (var->bits_per_pixel != 8))
 315                 var->bits_per_pixel = default_bpp;
 316
 317         switch (var->bits_per_pixel) {
 318         case 8:
 319                 var->red.length = 3;
 320                 var->red.offset = 5;
 321                 var->red.msb_right = 0;
 322
 323                 var->green.length = 3;
 324                 var->green.offset = 2;
 325                 var->green.msb_right = 0;
 326
 327                 var->blue.length = 2;
 328                 var->blue.offset = 0;
 329                 var->blue.msb_right = 0;
 330
 331                 var->transp.length = 0;
 332                 var->transp.offset = 0;
 333                 var->transp.msb_right = 0;
 334                 break;
 335         case 16:
 336                 var->red.length = 5;
 337                 var->red.offset = 11;
 338                 var->red.msb_right = 0;
 339
 340                 var->green.length = 6;
 341                 var->green.offset = 5;
 342                 var->green.msb_right = 0;
 343
 344                 var->blue.length = 5;
 345                 var->blue.offset = 0;
 346                 var->blue.msb_right = 0;
 347
 348                 var->transp.length = 0;
 349                 var->transp.offset = 0;
 350                 var->transp.msb_right = 0;
 351                 break;
 352         case 24:
 353                 var->red.length = 8;
 354                 var->red.offset = 16;
 355                 var->red.msb_right = 0;
 356
 357                 var->green.length = 8;
 358                 var->green.offset = 8;
 359                 var->green.msb_right = 0;
 360
 361                 var->blue.length = 8;
 362                 var->blue.offset = 0;
 363                 var->blue.msb_right = 0;
 364
 365                 var->transp.length = 0;
 366                 var->transp.offset = 0;
 367                 var->transp.msb_right = 0;
 368                 break;
 369         case 32:
 370                 var->red.length = 8;
 371                 var->red.offset = 16;
 372                 var->red.msb_right = 0;
 373
 374                 var->green.length = 8;
 375                 var->green.offset = 8;
 376                 var->green.msb_right = 0;
 377
 378                 var->blue.length = 8;
 379                 var->blue.offset = 0;
 380                 var->blue.msb_right = 0;
 381
 382                 var->transp.length = 8;
 383                 var->transp.offset = 24;
 384                 var->transp.msb_right = 0;
 385                 break;
 386         }
 387
 388         if (var->pixclock < 1000) {
 389                 htotal = var->xres + var->right_margin + var->hsync_len +
 390                     var->left_margin;
 391                 vtotal = var->yres + var->lower_margin + var->vsync_len +
 392                     var->upper_margin;
 393                 var->pixclock = (vtotal * htotal * 6UL) / 100UL;
 394                 var->pixclock = KHZ2PICOS(var->pixclock);
 395                 printf("pixclock set for 60Hz refresh = %u ps\n",
 396                         var->pixclock);
 397         }
 398
 399         var->height = -1;
 400         var->width = -1;
 401         var->grayscale = 0;
 402
 403         return 0;
 404 }
 405
 406 static int mxcfb_map_video_memory(struct fb_info *fbi)
 407 {
 408         if (fbi->fix.smem_len < fbi->var.yres_virtual * fbi->fix.line_length) {
 409                 fbi->fix.smem_len = fbi->var.yres_virtual *
 410                                     fbi->fix.line_length;
 411         }
 412         fbi->fix.smem_len = roundup(fbi->fix.smem_len, ARCH_DMA_MINALIGN);
 413
 414 #if CONFIG_IS_ENABLED(DM_VIDEO)
 415         fbi->screen_base = (char *)gd->video_bottom;
 416 #else
 417         fbi->screen_base = (char *)memalign(ARCH_DMA_MINALIGN,
 418                                             fbi->fix.smem_len);
 419 #endif
 420
 421         fbi->fix.smem_start = (unsigned long)fbi->screen_base;
 422         if (fbi->screen_base == 0) {
 423                 puts("Unable to allocate framebuffer memory\n");
 424                 fbi->fix.smem_len = 0;
 425                 fbi->fix.smem_start = 0;
 426                 return -EBUSY;
 427         }
 428
 429         debug("allocated fb @ paddr=0x%08X, size=%d.\n",
 430                 (uint32_t) fbi->fix.smem_start, fbi->fix.smem_len);
 431
 432         fbi->screen_size = fbi->fix.smem_len;
 433
 434 #if CONFIG_IS_ENABLED(VIDEO)
 435         gd->fb_base = fbi->fix.smem_start;
 436 #endif
 437
 438         /* Clear the screen */
 439         memset((char *)fbi->screen_base, 0, fbi->fix.smem_len);
 440
 441         return 0;
 442 }
 443
 444 static int mxcfb_unmap_video_memory(struct fb_info *fbi)
 445 {
 446         fbi->screen_base = 0;
 447         fbi->fix.smem_start = 0;
 448         fbi->fix.smem_len = 0;
 449         return 0;
 450 }
 451
 452 /*
 453  * Initializes the framebuffer information pointer. After allocating
 454  * sufficient memory for the framebuffer structure, the fields are
 455  * filled with custom information passed in from the configurable
 456  * structures.  This includes information such as bits per pixel,
 457  * color maps, screen width/height and RGBA offsets.
 458  *
 459  * @return      Framebuffer structure initialized with our information
 460  */
 461 static struct fb_info *mxcfb_init_fbinfo(void)
 462 {
 463 #define BYTES_PER_LONG 4
 464 #define PADDING (BYTES_PER_LONG - (sizeof(struct fb_info) % BYTES_PER_LONG))
 465         struct fb_info *fbi;
 466         struct mxcfb_info *mxcfbi;
 467         char *p;
 468         int size = sizeof(struct mxcfb_info) + PADDING +
 469                 sizeof(struct fb_info);
 470
 471         debug("%s: %d %d %d %d\n",
 472                 __func__,
 473                 PADDING,
 474                 size,
 475                 sizeof(struct mxcfb_info),
 476                 sizeof(struct fb_info));
 477         /*
 478          * Allocate sufficient memory for the fb structure
 479          */
 480
 481         p = malloc(size);
 482         if (!p)
 483                 return NULL;
 484
 485         memset(p, 0, size);
 486
 487         fbi = (struct fb_info *)p;
 488         fbi->par = p + sizeof(struct fb_info) + PADDING;
 489
 490         mxcfbi = (struct mxcfb_info *)fbi->par;
 491         debug("Framebuffer structures at: fbi=0x%x mxcfbi=0x%x\n",
 492                 (unsigned int)fbi, (unsigned int)mxcfbi);
 493
 494         fbi->var.activate = FB_ACTIVATE_NOW;
 495
 496         fbi->flags = FBINFO_FLAG_DEFAULT;
 497         fbi->pseudo_palette = mxcfbi->pseudo_palette;
 498
 499         return fbi;
 500 }
 501
 502 /*
 503  * Probe routine for the framebuffer driver. It is called during the
 504  * driver binding process. The following functions are performed in
 505  * this routine: Framebuffer initialization, Memory allocation and
 506  * mapping, Framebuffer registration, IPU initialization.
 507  *
 508  * @return      Appropriate error code to the kernel common code
 509  */
 510 static int mxcfb_probe(u32 interface_pix_fmt, uint8_t disp,
 511                         struct fb_videomode const *mode)
 512 {
 513         struct fb_info *fbi;
 514         struct mxcfb_info *mxcfbi;
 515         int ret = 0;
 516
 517         /*
 518          * Initialize FB structures
 519          */
 520         fbi = mxcfb_init_fbinfo();
 521         if (!fbi) {
 522                 ret = -ENOMEM;
 523                 goto err0;
 524         }
 525         mxcfbi = (struct mxcfb_info *)fbi->par;
 526
 527         if (!g_dp_in_use) {
 528                 mxcfbi->ipu_ch = MEM_BG_SYNC;
 529                 mxcfbi->blank = FB_BLANK_UNBLANK;
 530         } else {
 531                 mxcfbi->ipu_ch = MEM_DC_SYNC;
 532                 mxcfbi->blank = FB_BLANK_POWERDOWN;
 533         }
 534
 535         mxcfbi->ipu_di = disp;
 536
 537         ipu_disp_set_global_alpha(mxcfbi->ipu_ch, 1, 0x80);
 538         ipu_disp_set_color_key(mxcfbi->ipu_ch, 0, 0);
 539         strcpy(fbi->fix.id, "DISP3 BG");
 540
 541         g_dp_in_use = 1;
 542
 543         mxcfb_info[mxcfbi->ipu_di] = fbi;
 544
 545         /* Need dummy values until real panel is configured */
 546
 547         mxcfbi->ipu_di_pix_fmt = interface_pix_fmt;
 548         fb_videomode_to_var(&fbi->var, mode);
 549         fbi->var.bits_per_pixel = 16;
 550         fbi->fix.line_length = fbi->var.xres * (fbi->var.bits_per_pixel / 8);
 551         fbi->fix.smem_len = fbi->var.yres_virtual * fbi->fix.line_length;
 552
 553         mxcfb_check_var(&fbi->var, fbi);
 554
 555         /* Default Y virtual size is 2x panel size */
 556         fbi->var.yres_virtual = fbi->var.yres * 2;
 557
 558         mxcfb_set_fix(fbi);
 559
 560         /* allocate fb first */
 561         if (mxcfb_map_video_memory(fbi) < 0)
 562                 return -ENOMEM;
 563
 564         mxcfb_set_par(fbi);
 565
 566         panel.winSizeX = mode->xres;
 567         panel.winSizeY = mode->yres;
 568         panel.plnSizeX = mode->xres;
 569         panel.plnSizeY = mode->yres;
 570
 571         panel.frameAdrs = (u32)fbi->screen_base;
 572         panel.memSize = fbi->screen_size;
 573
 574         panel.gdfBytesPP = 2;
 575         panel.gdfIndex = GDF_16BIT_565RGB;
 576
 577         ipu_dump_registers();
 578
 579         return 0;
 580
 581 err0:
 582         return ret;
 583 }
 584
 585 void ipuv3_fb_shutdown(void)
 586 {
 587         int i;
 588         struct ipu_stat *stat = (struct ipu_stat *)IPU_STAT;
 589
 590         if (!ipu_clk_enabled())
 591                 return;
 592
 593         for (i = 0; i < ARRAY_SIZE(mxcfb_info); i++) {
 594                 struct fb_info *fbi = mxcfb_info[i];
 595                 if (fbi) {
 596                         struct mxcfb_info *mxc_fbi = fbi->par;
 597                         ipu_disable_channel(mxc_fbi->ipu_ch);
 598                         ipu_uninit_channel(mxc_fbi->ipu_ch);
 599                 }
 600         }
 601         for (i = 0; i < ARRAY_SIZE(stat->int_stat); i++) {
 602                 __raw_writel(__raw_readl(&stat->int_stat[i]),
 603                              &stat->int_stat[i]);
 604         }
 605 }
 606
 607 void *video_hw_init(void)
 608 {
 609         int ret;
 610
 611         ret = ipu_probe();
 612         if (ret)
 613                 puts("Error initializing IPU\n");
 614
 615         ret = mxcfb_probe(gpixfmt, gdisp, gmode);
 616         debug("Framebuffer at 0x%x\n", (unsigned int)panel.frameAdrs);
 617         gd->fb_base = panel.frameAdrs;
 618
 619         return (void *)&panel;
 620 }
 621
 622 int ipuv3_fb_init(struct fb_videomode const *mode,
 623                   uint8_t disp,
 624                   uint32_t pixfmt)
 625 {
 626         gmode = mode;
 627         gdisp = disp;
 628         gpixfmt = pixfmt;
 629
 630         return 0;
 631 }
 632
 633 #if CONFIG_IS_ENABLED(DM_VIDEO)
 634 enum {
 635         /* Maximum display size we support */
 636         LCD_MAX_WIDTH           = 1920,
 637         LCD_MAX_HEIGHT          = 1080,
 638         LCD_MAX_LOG2_BPP        = VIDEO_BPP16,
 639 };
 640
 641 static int ipuv3_video_probe(struct udevice *dev)
 642 {
 643         struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);
 644         struct video_priv *uc_priv = dev_get_uclass_priv(dev);
 645 #if defined(CONFIG_DISPLAY)
 646         struct udevice *disp_dev;
 647 #endif
 648         u32 fb_start, fb_end;
 649         int ret;
 650
 651         debug("%s() plat: base 0x%lx, size 0x%x\n",
 652               __func__, plat->base, plat->size);
 653
 654         ret = ipu_probe();
 655         if (ret)
 656                 return ret;
 657
 658         ret = ipu_displays_init();
 659         if (ret < 0)
 660                 return ret;
 661
 662         ret = mxcfb_probe(gpixfmt, gdisp, gmode);
 663         if (ret < 0)
 664                 return ret;
 665
 666 #if defined(CONFIG_DISPLAY)
 667         ret = uclass_first_device(UCLASS_DISPLAY, &disp_dev);
 668         if (disp_dev) {
 669                 ret = display_enable(disp_dev, 16, NULL);
 670                 if (ret < 0)
 671                         return ret;
 672         }
 673 #endif
 674         if (CONFIG_IS_ENABLED(PANEL)) {
 675                 struct udevice *panel_dev;
 676
 677                 ret = uclass_get_device(UCLASS_PANEL, 0, &panel_dev);
 678                 if (panel_dev)
 679                         panel_enable_backlight(panel_dev);
 680         }
 681
 682         uc_priv->xsize = gmode->xres;
 683         uc_priv->ysize = gmode->yres;
 684         uc_priv->bpix = LCD_MAX_LOG2_BPP;
 685
 686         /* Enable dcache for the frame buffer */
 687         fb_start = plat->base & ~(MMU_SECTION_SIZE - 1);
 688         fb_end = plat->base + plat->size;
 689         fb_end = ALIGN(fb_end, 1 << MMU_SECTION_SHIFT);
 690         mmu_set_region_dcache_behaviour(fb_start, fb_end - fb_start,
 691                                         DCACHE_WRITEBACK);
 692         video_set_flush_dcache(dev, true);
 693         gd->fb_base = fb_start;
 694
 695         return 0;
 696 }
 697
 698 struct ipuv3_video_priv {
 699         ulong regs;
 700 };
 701
 702 static int ipuv3_video_bind(struct udevice *dev)
 703 {
 704         struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);
 705
 706         plat->size = LCD_MAX_WIDTH * LCD_MAX_HEIGHT *
 707                      (1 << VIDEO_BPP32) / 8;
 708
 709         return 0;
 710 }
 711
 712 static const struct udevice_id ipuv3_video_ids[] = {
 713         { .compatible = "fsl,imx6q-ipu" },
 714         { .compatible = "fsl,imx53-ipu" },
 715         { }
 716 };
 717
 718 U_BOOT_DRIVER(ipuv3_video) = {
 719         .name   = "ipuv3_video",
 720         .id     = UCLASS_VIDEO,
 721         .of_match = ipuv3_video_ids,
 722         .bind   = ipuv3_video_bind,
 723         .probe  = ipuv3_video_probe,
 724         .priv_auto_alloc_size = sizeof(struct ipuv3_video_priv),
 725         .flags  = DM_FLAG_PRE_RELOC,
 726 };
 727 #endif /* CONFIG_DM_VIDEO */