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 /* #define DEBUG */
  15 #include <common.h>
  16 #include <asm/errno.h>
  17 #include <linux/string.h>
  18 #include <linux/list.h>
  19 #include <linux/fb.h>
  20 #include <asm/io.h>
  21 #include <malloc.h>
  22 #include <lcd.h>
  23 #include <ipu.h>
  24 #include <video_fb.h>
  25 #include <mxcfb.h>
  26
  27 #include "ipu_regs.h"
  28 #include "videomodes.h"
  29
  30 DECLARE_GLOBAL_DATA_PTR;
  31
  32 static int mxcfb_map_video_memory(struct fb_info *fbi);
  33 static int mxcfb_unmap_video_memory(struct fb_info *fbi);
  34
  35 void lcd_initcolregs(void)
  36 {
  37 }
  38
  39 void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue)
  40 {
  41 }
  42
  43 static void fb_videomode_to_var(struct fb_var_screeninfo *var,
  44                          const struct fb_videomode *mode)
  45 {
  46         var->xres = mode->xres;
  47         var->yres = mode->yres;
  48         var->xres_virtual = mode->xres;
  49         var->yres_virtual = mode->yres;
  50         var->xoffset = 0;
  51         var->yoffset = 0;
  52         var->pixclock = mode->pixclock;
  53         var->left_margin = mode->left_margin;
  54         var->right_margin = mode->right_margin;
  55         var->upper_margin = mode->upper_margin;
  56         var->lower_margin = mode->lower_margin;
  57         var->hsync_len = mode->hsync_len;
  58         var->vsync_len = mode->vsync_len;
  59         var->sync = mode->sync;
  60         var->vmode = mode->vmode & FB_VMODE_MASK;
  61 }
  62
  63 /*
  64  * Structure containing the MXC specific framebuffer information.
  65  */
  66 struct mxcfb_info {
  67         int blank;
  68         ipu_channel_t ipu_ch;
  69         int ipu_di;
  70         u32 ipu_di_pix_fmt;
  71         unsigned char overlay;
  72         unsigned char alpha_chan_en;
  73         dma_addr_t alpha_phy_addr0;
  74         dma_addr_t alpha_phy_addr1;
  75         void *alpha_virt_addr0;
  76         void *alpha_virt_addr1;
  77         uint32_t alpha_mem_len;
  78         uint32_t cur_ipu_buf;
  79         uint32_t cur_ipu_alpha_buf;
  80
  81         u32 pseudo_palette[16];
  82 };
  83
  84 enum {
  85         BOTH_ON,
  86         SRC_ON,
  87         TGT_ON,
  88         BOTH_OFF
  89 };
  90
  91 static unsigned long default_bpp = 16;
  92 static unsigned char g_dp_in_use;
  93 static struct fb_info *mxcfb_info[3];
  94 static int ext_clk_used;
  95
  96 static uint32_t bpp_to_pixfmt(struct fb_info *fbi)
  97 {
  98         uint32_t pixfmt = 0;
  99
 100         debug("bpp_to_pixfmt: %d\n", fbi->var.bits_per_pixel);
 101
 102         if (fbi->var.nonstd)
 103                 return fbi->var.nonstd;
 104
 105         switch (fbi->var.bits_per_pixel) {
 106         case 24:
 107                 pixfmt = IPU_PIX_FMT_BGR24;
 108                 break;
 109         case 32:
 110                 pixfmt = IPU_PIX_FMT_BGR32;
 111                 break;
 112         case 16:
 113                 pixfmt = IPU_PIX_FMT_RGB565;
 114                 break;
 115         case 8:
 116                 pixfmt = IPU_PIX_FMT_GENERIC;
 117         }
 118         return pixfmt;
 119 }
 120
 121 /*
 122  * Set fixed framebuffer parameters based on variable settings.
 123  *
 124  * @param       info     framebuffer information pointer
 125  */
 126 static int mxcfb_set_fix(struct fb_info *info)
 127 {
 128         struct fb_fix_screeninfo *fix = &info->fix;
 129         struct fb_var_screeninfo *var = &info->var;
 130
 131         fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
 132
 133         fix->type = FB_TYPE_PACKED_PIXELS;
 134         fix->accel = FB_ACCEL_NONE;
 135         fix->visual = FB_VISUAL_TRUECOLOR;
 136         fix->xpanstep = 1;
 137         fix->ypanstep = 1;
 138
 139         return 0;
 140 }
 141
 142 static int setup_disp_channel1(struct fb_info *fbi)
 143 {
 144         ipu_channel_params_t params;
 145         struct mxcfb_info *mxc_fbi = fbi->par;
 146
 147         memset(&params, 0, sizeof(params));
 148         params.mem_dp_bg_sync.di = mxc_fbi->ipu_di;
 149
 150         debug("%s called\n", __func__);
 151         /*
 152          * Assuming interlaced means yuv output, below setting also
 153          * valid for mem_dc_sync. FG should have the same vmode as BG.
 154          */
 155         if (fbi->var.vmode & FB_VMODE_INTERLACED) {
 156                 params.mem_dp_bg_sync.interlaced = 1;
 157                 params.mem_dp_bg_sync.out_pixel_fmt =
 158                         IPU_PIX_FMT_YUV444;
 159         } else {
 160                 if (mxc_fbi->ipu_di_pix_fmt) {
 161                         params.mem_dp_bg_sync.out_pixel_fmt =
 162                                 mxc_fbi->ipu_di_pix_fmt;
 163                 } else {
 164                         params.mem_dp_bg_sync.out_pixel_fmt =
 165                                 IPU_PIX_FMT_RGB666;
 166                 }
 167         }
 168         params.mem_dp_bg_sync.in_pixel_fmt = bpp_to_pixfmt(fbi);
 169         if (mxc_fbi->alpha_chan_en)
 170                 params.mem_dp_bg_sync.alpha_chan_en = 1;
 171
 172         ipu_init_channel(mxc_fbi->ipu_ch, &params);
 173
 174         return 0;
 175 }
 176
 177 static int setup_disp_channel2(struct fb_info *fbi)
 178 {
 179         int retval = 0;
 180         struct mxcfb_info *mxc_fbi = fbi->par;
 181
 182         mxc_fbi->cur_ipu_buf = 1;
 183         if (mxc_fbi->alpha_chan_en)
 184                 mxc_fbi->cur_ipu_alpha_buf = 1;
 185
 186         fbi->var.xoffset = fbi->var.yoffset = 0;
 187
 188         debug("%s: ch: %08x xres: %d yres: %d line_length: %d mem: %08lx .. %08lx\n",
 189                 __func__,
 190                 mxc_fbi->ipu_ch,
 191                 fbi->var.xres,
 192                 fbi->var.yres,
 193                 fbi->fix.line_length,
 194                 fbi->fix.smem_start,
 195                 fbi->fix.smem_start +
 196                 (fbi->fix.line_length * fbi->var.yres) - 1);
 197
 198         retval = ipu_init_channel_buffer(mxc_fbi->ipu_ch, IPU_INPUT_BUFFER,
 199                                          bpp_to_pixfmt(fbi),
 200                                          fbi->var.xres, fbi->var.yres,
 201                                          fbi->fix.line_length,
 202                                          fbi->fix.smem_start +
 203                                          (fbi->fix.line_length * fbi->var.yres),
 204                                          fbi->fix.smem_start,
 205                                          0, 0);
 206         if (retval)
 207                 printf("ipu_init_channel_buffer error %d\n", retval);
 208
 209         return retval;
 210 }
 211
 212 /*
 213  * Set framebuffer parameters and change the operating mode.
 214  *
 215  * @param       info     framebuffer information pointer
 216  */
 217 static int mxcfb_set_par(struct fb_info *fbi)
 218 {
 219         int retval = 0;
 220         u32 mem_len;
 221         ipu_di_signal_cfg_t sig_cfg;
 222         struct mxcfb_info *mxc_fbi = fbi->par;
 223         uint32_t out_pixel_fmt;
 224
 225         ipu_disable_channel(mxc_fbi->ipu_ch);
 226         ipu_uninit_channel(mxc_fbi->ipu_ch);
 227         mxcfb_set_fix(fbi);
 228
 229         mem_len = fbi->var.yres_virtual * fbi->fix.line_length;
 230         if (!fbi->fix.smem_start || (mem_len > fbi->fix.smem_len)) {
 231                 if (fbi->fix.smem_start)
 232                         mxcfb_unmap_video_memory(fbi);
 233
 234                 if (mxcfb_map_video_memory(fbi) < 0)
 235                         return -ENOMEM;
 236         }
 237
 238         setup_disp_channel1(fbi);
 239
 240         memset(&sig_cfg, 0, sizeof(sig_cfg));
 241         if (fbi->var.vmode & FB_VMODE_INTERLACED) {
 242                 sig_cfg.interlaced = 1;
 243                 out_pixel_fmt = IPU_PIX_FMT_YUV444;
 244         } else {
 245                 if (mxc_fbi->ipu_di_pix_fmt)
 246                         out_pixel_fmt = mxc_fbi->ipu_di_pix_fmt;
 247                 else
 248                         out_pixel_fmt = IPU_PIX_FMT_RGB666;
 249         }
 250         if (fbi->var.vmode & FB_VMODE_ODD_FLD_FIRST) /* PAL */
 251                 sig_cfg.odd_field_first = 1;
 252         if ((fbi->var.sync & FB_SYNC_EXT) || ext_clk_used)
 253                 sig_cfg.ext_clk = 1;
 254         if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT)
 255                 sig_cfg.Hsync_pol = 1;
 256         if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT)
 257                 sig_cfg.Vsync_pol = 1;
 258         if (!(fbi->var.sync & FB_SYNC_CLK_LAT_FALL))
 259                 sig_cfg.clk_pol = 1;
 260         if (fbi->var.sync & FB_SYNC_DATA_INVERT)
 261                 sig_cfg.data_pol = 1;
 262         if (!(fbi->var.sync & FB_SYNC_OE_LOW_ACT))
 263                 sig_cfg.enable_pol = 1;
 264         if (fbi->var.sync & FB_SYNC_CLK_IDLE_EN)
 265                 sig_cfg.clkidle_en = 1;
 266
 267         debug("pixclock = %lu.%03lu MHz\n",
 268                 PICOS2KHZ(fbi->var.pixclock) / 1000,
 269                 PICOS2KHZ(fbi->var.pixclock) % 1000);
 270
 271         retval = 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);
 282         if (retval != 0) {
 283                 printf("mxc_ipuv3_fb: Error %d initializing panel\n", retval);
 284                 return retval;
 285         }
 286
 287         retval = setup_disp_channel2(fbi);
 288         if (retval)
 289                 return retval;
 290
 291         if (mxc_fbi->blank == FB_BLANK_UNBLANK)
 292                 ipu_enable_channel(mxc_fbi->ipu_ch);
 293
 294         return retval;
 295 }
 296
 297 /*
 298  * Check framebuffer variable parameters and adjust to valid values.
 299  *
 300  * @param       var      framebuffer variable parameters
 301  *
 302  * @param       info     framebuffer information pointer
 303  */
 304 static int mxcfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 305 {
 306         u32 vtotal;
 307         u32 htotal;
 308
 309         if (var->xres_virtual < var->xres)
 310                 var->xres_virtual = var->xres;
 311         if (var->yres_virtual < var->yres)
 312                 var->yres_virtual = var->yres;
 313
 314         if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
 315             (var->bits_per_pixel != 16) && (var->bits_per_pixel != 8))
 316                 var->bits_per_pixel = default_bpp;
 317
 318         switch (var->bits_per_pixel) {
 319         case 8:
 320                 var->red.length = 3;
 321                 var->red.offset = 5;
 322                 var->red.msb_right = 0;
 323
 324                 var->green.length = 3;
 325                 var->green.offset = 2;
 326                 var->green.msb_right = 0;
 327
 328                 var->blue.length = 2;
 329                 var->blue.offset = 0;
 330                 var->blue.msb_right = 0;
 331
 332                 var->transp.length = 0;
 333                 var->transp.offset = 0;
 334                 var->transp.msb_right = 0;
 335                 break;
 336         case 16:
 337                 var->red.length = 5;
 338                 var->red.offset = 11;
 339                 var->red.msb_right = 0;
 340
 341                 var->green.length = 6;
 342                 var->green.offset = 5;
 343                 var->green.msb_right = 0;
 344
 345                 var->blue.length = 5;
 346                 var->blue.offset = 0;
 347                 var->blue.msb_right = 0;
 348
 349                 var->transp.length = 0;
 350                 var->transp.offset = 0;
 351                 var->transp.msb_right = 0;
 352                 break;
 353         case 24:
 354                 var->red.length = 8;
 355                 var->red.offset = 16;
 356                 var->red.msb_right = 0;
 357
 358                 var->green.length = 8;
 359                 var->green.offset = 8;
 360                 var->green.msb_right = 0;
 361
 362                 var->blue.length = 8;
 363                 var->blue.offset = 0;
 364                 var->blue.msb_right = 0;
 365
 366                 var->transp.length = 0;
 367                 var->transp.offset = 0;
 368                 var->transp.msb_right = 0;
 369                 break;
 370         case 32:
 371                 var->red.length = 8;
 372                 var->red.offset = 16;
 373                 var->red.msb_right = 0;
 374
 375                 var->green.length = 8;
 376                 var->green.offset = 8;
 377                 var->green.msb_right = 0;
 378
 379                 var->blue.length = 8;
 380                 var->blue.offset = 0;
 381                 var->blue.msb_right = 0;
 382
 383                 var->transp.length = 8;
 384                 var->transp.offset = 24;
 385                 var->transp.msb_right = 0;
 386                 break;
 387         }
 388
 389         if (var->pixclock < 1000) {
 390                 htotal = var->xres + var->right_margin + var->hsync_len +
 391                     var->left_margin;
 392                 vtotal = var->yres + var->lower_margin + var->vsync_len +
 393                     var->upper_margin;
 394                 var->pixclock = (vtotal * htotal * 6UL) / 100UL;
 395                 var->pixclock = KHZ2PICOS(var->pixclock);
 396                 printf("pixclock set for 60Hz refresh = %u ps\n",
 397                         var->pixclock);
 398         }
 399
 400         var->height = -1;
 401         var->width = -1;
 402         var->grayscale = 0;
 403
 404         return 0;
 405 }
 406
 407 static int mxcfb_map_video_memory(struct fb_info *fbi)
 408 {
 409         if (fbi->fix.smem_len < fbi->var.yres_virtual * fbi->fix.line_length) {
 410                 fbi->fix.smem_len = fbi->var.yres_virtual *
 411                                     fbi->fix.line_length;
 412         }
 413         if (gd->fb_base)
 414                 fbi->screen_base = (void *)gd->fb_base;
 415         else
 416                 fbi->screen_base = malloc(fbi->fix.smem_len);
 417         if (fbi->screen_base == NULL) {
 418                 puts("Unable to allocate framebuffer memory\n");
 419                 fbi->fix.smem_len = 0;
 420                 return -EBUSY;
 421         }
 422         fbi->fix.smem_start = (unsigned long)fbi->screen_base;
 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         return 0;
 430 }
 431
 432 static int mxcfb_unmap_video_memory(struct fb_info *fbi)
 433 {
 434         fbi->screen_base = 0;
 435         fbi->fix.smem_start = 0;
 436         fbi->fix.smem_len = 0;
 437         return 0;
 438 }
 439
 440 void ipuv3_fb_shutdown(void)
 441 {
 442         int i;
 443         struct ipu_stat *stat = (struct ipu_stat *)IPU_STAT;
 444
 445         for (i = 0; i < ARRAY_SIZE(mxcfb_info); i++) {
 446                 struct fb_info *fbi = mxcfb_info[i];
 447
 448                 if (fbi) {
 449                         struct mxcfb_info *mxc_fbi = fbi->par;
 450
 451                         ipu_disable_channel(mxc_fbi->ipu_ch);
 452                         ipu_uninit_channel(mxc_fbi->ipu_ch);
 453                 }
 454         }
 455
 456         clk_enable(g_ipu_clk);
 457         for (i = 0; i < ARRAY_SIZE(stat->int_stat); i++) {
 458                 __raw_writel(__raw_readl(&stat->int_stat[i]),
 459                         &stat->int_stat[i]);
 460         }
 461         clk_disable(g_ipu_clk);
 462 }
 463
 464 /*
 465  * Initializes the framebuffer information pointer. After allocating
 466  * sufficient memory for the framebuffer structure, the fields are
 467  * filled with custom information passed in from the configurable
 468  * structures.  This includes information such as bits per pixel,
 469  * color maps, screen width/height and RGBA offsets.
 470  *
 471  * @return      Framebuffer structure initialized with our information
 472  */
 473 static struct fb_info *mxcfb_init_fbinfo(void)
 474 {
 475         struct fb_info *fbi;
 476         struct mxcfb_info *mxcfbi;
 477         void *p;
 478         int size = ALIGN(sizeof(struct mxcfb_info), sizeof(long)) +
 479                 sizeof(struct fb_info);
 480
 481         debug("%s: %d %d %d\n",
 482                 __func__,
 483                 size,
 484                 sizeof(struct mxcfb_info),
 485                 sizeof(struct fb_info));
 486         /*
 487          * Allocate sufficient memory for the fb structure
 488          */
 489
 490         p = malloc(size);
 491         if (!p)
 492                 return NULL;
 493
 494         memset(p, 0, size);
 495
 496         fbi = p;
 497         fbi->par = p + ALIGN(sizeof(struct fb_info), sizeof(long));
 498
 499         mxcfbi = fbi->par;
 500         debug("Framebuffer structures at: fbi=%p mxcfbi=%p\n",
 501                 fbi, mxcfbi);
 502
 503         fbi->var.activate = FB_ACTIVATE_NOW;
 504
 505         fbi->flags = FBINFO_FLAG_DEFAULT;
 506         fbi->pseudo_palette = mxcfbi->pseudo_palette;
 507
 508         return fbi;
 509 }
 510
 511 /*
 512  * Probe routine for the framebuffer driver. It is called during the
 513  * driver binding process.      The following functions are performed in
 514  * this routine: Framebuffer initialization, Memory allocation and
 515  * mapping, Framebuffer registration, IPU initialization.
 516  *
 517  * @return      Appropriate error code to the kernel common code
 518  */
 519 static int mxcfb_probe(u32 interface_pix_fmt, struct fb_videomode *mode, int di)
 520 {
 521         struct fb_info *fbi;
 522         struct mxcfb_info *mxcfbi;
 523
 524         /*
 525          * Initialize FB structures
 526          */
 527         fbi = mxcfb_init_fbinfo();
 528         if (!fbi)
 529                 return -ENOMEM;
 530
 531         mxcfbi = fbi->par;
 532
 533         if (!g_dp_in_use) {
 534                 mxcfbi->ipu_ch = MEM_BG_SYNC;
 535                 mxcfbi->blank = FB_BLANK_UNBLANK;
 536         } else {
 537                 mxcfbi->ipu_ch = MEM_DC_SYNC;
 538                 mxcfbi->blank = FB_BLANK_POWERDOWN;
 539         }
 540
 541         mxcfbi->ipu_di = di;
 542
 543         ipu_disp_set_global_alpha(mxcfbi->ipu_ch, 1, 0x80);
 544         ipu_disp_set_color_key(mxcfbi->ipu_ch, 0, 0);
 545         strcpy(fbi->fix.id, "DISP3 BG");
 546
 547         g_dp_in_use = 1;
 548
 549         mxcfb_info[mxcfbi->ipu_di] = fbi;
 550
 551         /* Need dummy values until real panel is configured */
 552         fbi->var.xres = panel_info.vl_col;
 553         fbi->var.yres = panel_info.vl_row;
 554
 555         mxcfbi->ipu_di_pix_fmt = interface_pix_fmt;
 556         fb_videomode_to_var(&fbi->var, mode);
 557         fbi->var.bits_per_pixel = NBITS(panel_info.vl_bpix);
 558         fbi->fix.line_length = fbi->var.xres * (fbi->var.bits_per_pixel / 8);
 559         fbi->fix.smem_len = fbi->var.yres_virtual * fbi->fix.line_length;
 560
 561         mxcfb_check_var(&fbi->var, fbi);
 562
 563         /* Default Y virtual size is 2x panel size */
 564         fbi->var.yres_virtual = fbi->var.yres * 2;
 565
 566         mxcfb_set_fix(fbi);
 567
 568         /* allocate fb first */
 569         if (mxcfb_map_video_memory(fbi) < 0)
 570                 return -ENOMEM;
 571
 572         mxcfb_set_par(fbi);
 573
 574         lcd_line_length = (panel_info.vl_col * NBITS(panel_info.vl_bpix)) / 8;
 575
 576         debug("MXC IPUV3 configured\n"
 577                 "XRES = %d YRES = %d BitsXpixel = %d\n",
 578                 panel_info.vl_col,
 579                 panel_info.vl_row,
 580                 panel_info.vl_bpix);
 581
 582         ipu_dump_registers();
 583
 584         return 0;
 585 }
 586
 587 ulong calc_fbsize(void)
 588 {
 589         return (panel_info.vl_col * panel_info.vl_row *
 590                 NBITS(panel_info.vl_bpix)) / 8;
 591 }
 592
 593 int ipuv3_fb_init(struct fb_videomode *mode, int di, unsigned int interface_pix_fmt,
 594                 ipu_di_clk_parent_t di_clk_parent, unsigned long di_clk_val, int bpp)
 595 {
 596         int ret;
 597
 598         default_bpp = bpp;
 599
 600         ret = ipu_probe(di, di_clk_parent, di_clk_val);
 601         if (ret) {
 602                 printf("Error initializing IPU\n");
 603                 return ret;
 604         }
 605
 606         return mxcfb_probe(interface_pix_fmt, mode, di);
 607 }