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