drivers/video/mxc_ipuv3_fb.c

   1 /*
   2  * Porting to u-boot:
   3  *
   4  * (C) Copyright 2010
   5  * Stefano Babic, DENX Software Engineering, sbabic@denx.de
   6  *
   7  * IPUv3 Linux framebuffer:
   8  *
   9  * (C) Copyright 2004-2011 Freescale Semiconductor, Inc.
  10  *
  11  * SPDX-License-Identifier:     GPL-2.0+
  12  */
  13
  14 #include <common.h>
  15 #include <asm/errno.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 <lcd.h>
  22 #include <ipu.h>
  23 #include <video_fb.h>
  24 #include <mxcfb.h>
  25 #include "videomodes.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 void lcd_initcolregs(void)
  33 {
  34 }
  35
  36 void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue)
  37 {
  38 }
  39
  40 static void fb_videomode_to_var(struct fb_var_screeninfo *var,
  41                          const struct fb_videomode *mode)
  42 {
  43         var->xres = mode->xres;
  44         var->yres = mode->yres;
  45         var->xres_virtual = mode->xres;
  46         var->yres_virtual = mode->yres;
  47         var->xoffset = 0;
  48         var->yoffset = 0;
  49         var->pixclock = mode->pixclock;
  50         var->left_margin = mode->left_margin;
  51         var->right_margin = mode->right_margin;
  52         var->upper_margin = mode->upper_margin;
  53         var->lower_margin = mode->lower_margin;
  54         var->hsync_len = mode->hsync_len;
  55         var->vsync_len = mode->vsync_len;
  56         var->sync = mode->sync;
  57         var->vmode = mode->vmode & FB_VMODE_MASK;
  58 }
  59
  60 /*
  61  * Structure containing the MXC specific framebuffer information.
  62  */
  63 struct mxcfb_info {
  64         int blank;
  65         ipu_channel_t ipu_ch;
  66         int ipu_di;
  67         u32 ipu_di_pix_fmt;
  68         unsigned char overlay;
  69         unsigned char alpha_chan_en;
  70         dma_addr_t alpha_phy_addr0;
  71         dma_addr_t alpha_phy_addr1;
  72         void *alpha_virt_addr0;
  73         void *alpha_virt_addr1;
  74         uint32_t alpha_mem_len;
  75         uint32_t cur_ipu_buf;
  76         uint32_t cur_ipu_alpha_buf;
  77
  78         u32 pseudo_palette[16];
  79 };
  80
  81 enum {
  82         BOTH_ON,
  83         SRC_ON,
  84         TGT_ON,
  85         BOTH_OFF
  86 };
  87
  88 static unsigned long default_bpp = 16;
  89 static unsigned char g_dp_in_use;
  90 static struct fb_info *mxcfb_info[3];
  91 static int ext_clk_used;
  92
  93 static uint32_t bpp_to_pixfmt(struct fb_info *fbi)
  94 {
  95         uint32_t pixfmt = 0;
  96
  97         debug("bpp_to_pixfmt: %d\n", fbi->var.bits_per_pixel);
  98
  99         if (fbi->var.nonstd)
 100                 return fbi->var.nonstd;
 101
 102         switch (fbi->var.bits_per_pixel) {
 103         case 24:
 104                 pixfmt = IPU_PIX_FMT_BGR24;
 105                 break;
 106         case 32:
 107                 pixfmt = IPU_PIX_FMT_BGR32;
 108                 break;
 109         case 16:
 110                 pixfmt = IPU_PIX_FMT_RGB565;
 111                 break;
 112         case 8:
 113                 pixfmt = IPU_PIX_FMT_GENERIC;
 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 = 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 = 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: ch: %08x xres: %d yres: %d line_length: %d mem: %08lx .. %08lx\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) - 1);
 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 = 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.%03lu MHz\n",
 265                 PICOS2KHZ(fbi->var.pixclock) / 1000,
 266                 PICOS2KHZ(fbi->var.pixclock) % 1000);
 267
 268         retval = 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);
 279         if (retval != 0) {
 280                 printf("mxc_ipuv3_fb: Error %d initializing panel\n", retval);
 281                 return retval;
 282         }
 283
 284         retval = setup_disp_channel2(fbi);
 285         if (retval)
 286                 return retval;
 287
 288         if (mxc_fbi->blank == FB_BLANK_UNBLANK)
 289                 ipu_enable_channel(mxc_fbi->ipu_ch);
 290
 291         return retval;
 292 }
 293
 294 /*
 295  * Check framebuffer variable parameters and adjust to valid values.
 296  *
 297  * @param       var      framebuffer variable parameters
 298  *
 299  * @param       info     framebuffer information pointer
 300  */
 301 static int mxcfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 302 {
 303         u32 vtotal;
 304         u32 htotal;
 305
 306         if (var->xres_virtual < var->xres)
 307                 var->xres_virtual = var->xres;
 308         if (var->yres_virtual < var->yres)
 309                 var->yres_virtual = var->yres;
 310
 311         if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
 312             (var->bits_per_pixel != 16) && (var->bits_per_pixel != 8))
 313                 var->bits_per_pixel = default_bpp;
 314
 315         switch (var->bits_per_pixel) {
 316         case 8:
 317                 var->red.length = 3;
 318                 var->red.offset = 5;
 319                 var->red.msb_right = 0;
 320
 321                 var->green.length = 3;
 322                 var->green.offset = 2;
 323                 var->green.msb_right = 0;
 324
 325                 var->blue.length = 2;
 326                 var->blue.offset = 0;
 327                 var->blue.msb_right = 0;
 328
 329                 var->transp.length = 0;
 330                 var->transp.offset = 0;
 331                 var->transp.msb_right = 0;
 332                 break;
 333         case 16:
 334                 var->red.length = 5;
 335                 var->red.offset = 11;
 336                 var->red.msb_right = 0;
 337
 338                 var->green.length = 6;
 339                 var->green.offset = 5;
 340                 var->green.msb_right = 0;
 341
 342                 var->blue.length = 5;
 343                 var->blue.offset = 0;
 344                 var->blue.msb_right = 0;
 345
 346                 var->transp.length = 0;
 347                 var->transp.offset = 0;
 348                 var->transp.msb_right = 0;
 349                 break;
 350         case 24:
 351                 var->red.length = 8;
 352                 var->red.offset = 16;
 353                 var->red.msb_right = 0;
 354
 355                 var->green.length = 8;
 356                 var->green.offset = 8;
 357                 var->green.msb_right = 0;
 358
 359                 var->blue.length = 8;
 360                 var->blue.offset = 0;
 361                 var->blue.msb_right = 0;
 362
 363                 var->transp.length = 0;
 364                 var->transp.offset = 0;
 365                 var->transp.msb_right = 0;
 366                 break;
 367         case 32:
 368                 var->red.length = 8;
 369                 var->red.offset = 16;
 370                 var->red.msb_right = 0;
 371
 372                 var->green.length = 8;
 373                 var->green.offset = 8;
 374                 var->green.msb_right = 0;
 375
 376                 var->blue.length = 8;
 377                 var->blue.offset = 0;
 378                 var->blue.msb_right = 0;
 379
 380                 var->transp.length = 8;
 381                 var->transp.offset = 24;
 382                 var->transp.msb_right = 0;
 383                 break;
 384         }
 385
 386         if (var->pixclock < 1000) {
 387                 htotal = var->xres + var->right_margin + var->hsync_len +
 388                     var->left_margin;
 389                 vtotal = var->yres + var->lower_margin + var->vsync_len +
 390                     var->upper_margin;
 391                 var->pixclock = (vtotal * htotal * 6UL) / 100UL;
 392                 var->pixclock = KHZ2PICOS(var->pixclock);
 393                 printf("pixclock set for 60Hz refresh = %u ps\n",
 394                         var->pixclock);
 395         }
 396
 397         var->height = -1;
 398         var->width = -1;
 399         var->grayscale = 0;
 400
 401         return 0;
 402 }
 403
 404 static int mxcfb_map_video_memory(struct fb_info *fbi)
 405 {
 406         if (fbi->fix.smem_len < fbi->var.yres_virtual * fbi->fix.line_length) {
 407                 fbi->fix.smem_len = fbi->var.yres_virtual *
 408                                     fbi->fix.line_length;
 409         }
 410         if (gd->fb_base)
 411                 fbi->screen_base = (void *)gd->fb_base;
 412         else
 413                 fbi->screen_base = malloc(fbi->fix.smem_len);
 414         if (fbi->screen_base == NULL) {
 415                 puts("Unable to allocate framebuffer memory\n");
 416                 fbi->fix.smem_len = 0;
 417                 return -EBUSY;
 418         }
 419         fbi->fix.smem_start = (unsigned long)fbi->screen_base;
 420
 421         debug("allocated fb @ paddr=0x%08X, size=%d.\n",
 422                 (uint32_t) fbi->fix.smem_start, fbi->fix.smem_len);
 423
 424         fbi->screen_size = fbi->fix.smem_len;
 425
 426         return 0;
 427 }
 428
 429 static int mxcfb_unmap_video_memory(struct fb_info *fbi)
 430 {
 431         fbi->screen_base = 0;
 432         fbi->fix.smem_start = 0;
 433         fbi->fix.smem_len = 0;
 434         return 0;
 435 }
 436
 437 /*
 438  * Initializes the framebuffer information pointer. After allocating
 439  * sufficient memory for the framebuffer structure, the fields are
 440  * filled with custom information passed in from the configurable
 441  * structures.  This includes information such as bits per pixel,
 442  * color maps, screen width/height and RGBA offsets.
 443  *
 444  * @return      Framebuffer structure initialized with our information
 445  */
 446 static struct fb_info *mxcfb_init_fbinfo(void)
 447 {
 448         struct fb_info *fbi;
 449         struct mxcfb_info *mxcfbi;
 450         void *p;
 451         int size = ALIGN(sizeof(struct mxcfb_info), sizeof(long)) +
 452                 sizeof(struct fb_info);
 453
 454         debug("%s: %d %d %d\n",
 455                 __func__,
 456                 size,
 457                 sizeof(struct mxcfb_info),
 458                 sizeof(struct fb_info));
 459         /*
 460          * Allocate sufficient memory for the fb structure
 461          */
 462
 463         p = malloc(size);
 464         if (!p)
 465                 return NULL;
 466
 467         memset(p, 0, size);
 468
 469         fbi = p;
 470         fbi->par = p + ALIGN(sizeof(struct fb_info), sizeof(long));
 471
 472         mxcfbi = fbi->par;
 473         debug("Framebuffer structures at: fbi=%p mxcfbi=%p\n",
 474                 fbi, mxcfbi);
 475
 476         fbi->var.activate = FB_ACTIVATE_NOW;
 477
 478         fbi->flags = FBINFO_FLAG_DEFAULT;
 479         fbi->pseudo_palette = mxcfbi->pseudo_palette;
 480
 481         return fbi;
 482 }
 483
 484 /*
 485  * Probe routine for the framebuffer driver. It is called during the
 486  * driver binding process.      The following functions are performed in
 487  * this routine: Framebuffer initialization, Memory allocation and
 488  * mapping, Framebuffer registration, IPU initialization.
 489  *
 490  * @return      Appropriate error code to the kernel common code
 491  */
 492 static int mxcfb_probe(u32 interface_pix_fmt, struct fb_videomode *mode, int di)
 493 {
 494         struct fb_info *fbi;
 495         struct mxcfb_info *mxcfbi;
 496
 497         /*
 498          * Initialize FB structures
 499          */
 500         fbi = mxcfb_init_fbinfo();
 501         if (!fbi)
 502                 return -ENOMEM;
 503
 504         mxcfbi = fbi->par;
 505
 506         if (!g_dp_in_use) {
 507                 mxcfbi->ipu_ch = MEM_BG_SYNC;
 508                 mxcfbi->blank = FB_BLANK_UNBLANK;
 509         } else {
 510                 mxcfbi->ipu_ch = MEM_DC_SYNC;
 511                 mxcfbi->blank = FB_BLANK_POWERDOWN;
 512         }
 513
 514         mxcfbi->ipu_di = di;
 515
 516         ipu_disp_set_global_alpha(mxcfbi->ipu_ch, 1, 0x80);
 517         ipu_disp_set_color_key(mxcfbi->ipu_ch, 0, 0);
 518         strcpy(fbi->fix.id, "DISP3 BG");
 519
 520         g_dp_in_use = 1;
 521
 522         mxcfb_info[mxcfbi->ipu_di] = fbi;
 523
 524         /* Need dummy values until real panel is configured */
 525         fbi->var.xres = panel_info.vl_col;
 526         fbi->var.yres = panel_info.vl_row;
 527
 528         mxcfbi->ipu_di_pix_fmt = interface_pix_fmt;
 529         fb_videomode_to_var(&fbi->var, mode);
 530         fbi->var.bits_per_pixel = NBITS(panel_info.vl_bpix);
 531         fbi->fix.line_length = fbi->var.xres * (fbi->var.bits_per_pixel / 8);
 532         fbi->fix.smem_len = fbi->var.yres_virtual * fbi->fix.line_length;
 533
 534         mxcfb_check_var(&fbi->var, fbi);
 535
 536         /* Default Y virtual size is 2x panel size */
 537         fbi->var.yres_virtual = fbi->var.yres * 2;
 538
 539         mxcfb_set_fix(fbi);
 540
 541         /* allocate fb first */
 542         if (mxcfb_map_video_memory(fbi) < 0)
 543                 return -ENOMEM;
 544
 545         mxcfb_set_par(fbi);
 546
 547         lcd_line_length = (panel_info.vl_col * NBITS(panel_info.vl_bpix)) / 8;
 548
 549         debug("MXC IPUV3 configured\n"
 550                 "XRES = %d YRES = %d BitsXpixel = %d\n",
 551                 panel_info.vl_col,
 552                 panel_info.vl_row,
 553                 panel_info.vl_bpix);
 554
 555         ipu_dump_registers();
 556
 557         return 0;
 558 }
 559
 560 ulong calc_fbsize(void)
 561 {
 562         return (panel_info.vl_col * panel_info.vl_row *
 563                 NBITS(panel_info.vl_bpix)) / 8;
 564 }
 565
 566 int ipuv3_fb_init(struct fb_videomode *mode, int di, unsigned int interface_pix_fmt,
 567                 ipu_di_clk_parent_t di_clk_parent, unsigned long di_clk_val, int bpp)
 568 {
 569         int ret;
 570
 571         default_bpp = bpp;
 572
 573         ret = ipu_probe(di, di_clk_parent, di_clk_val);
 574         if (ret) {
 575                 printf("Error initializing IPU\n");
 576                 return ret;
 577         }
 578
 579         return mxcfb_probe(interface_pix_fmt, mode, di);
 580 }