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 #include "videomodes.h"
  27
  28 DECLARE_GLOBAL_DATA_PTR;
  29
  30 static int mxcfb_map_video_memory(struct fb_info *fbi);
  31 static int mxcfb_unmap_video_memory(struct fb_info *fbi);
  32
  33 void lcd_initcolregs(void)
  34 {
  35 }
  36
  37 void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue)
  38 {
  39 }
  40
  41 static void fb_videomode_to_var(struct fb_var_screeninfo *var,
  42                          const struct fb_videomode *mode)
  43 {
  44         var->xres = mode->xres;
  45         var->yres = mode->yres;
  46         var->xres_virtual = mode->xres;
  47         var->yres_virtual = mode->yres;
  48         var->xoffset = 0;
  49         var->yoffset = 0;
  50         var->pixclock = mode->pixclock;
  51         var->left_margin = mode->left_margin;
  52         var->right_margin = mode->right_margin;
  53         var->upper_margin = mode->upper_margin;
  54         var->lower_margin = mode->lower_margin;
  55         var->hsync_len = mode->hsync_len;
  56         var->vsync_len = mode->vsync_len;
  57         var->sync = mode->sync;
  58         var->vmode = mode->vmode & FB_VMODE_MASK;
  59 }
  60
  61 /*
  62  * Structure containing the MXC specific framebuffer information.
  63  */
  64 struct mxcfb_info {
  65         int blank;
  66         ipu_channel_t ipu_ch;
  67         int ipu_di;
  68         u32 ipu_di_pix_fmt;
  69         unsigned char overlay;
  70         unsigned char alpha_chan_en;
  71         dma_addr_t alpha_phy_addr0;
  72         dma_addr_t alpha_phy_addr1;
  73         void *alpha_virt_addr0;
  74         void *alpha_virt_addr1;
  75         uint32_t alpha_mem_len;
  76         uint32_t cur_ipu_buf;
  77         uint32_t cur_ipu_alpha_buf;
  78
  79         u32 pseudo_palette[16];
  80 };
  81
  82 enum {
  83         BOTH_ON,
  84         SRC_ON,
  85         TGT_ON,
  86         BOTH_OFF
  87 };
  88
  89 static unsigned long default_bpp = 16;
  90 static unsigned char g_dp_in_use;
  91 static struct fb_info *mxcfb_info[3];
  92 static int ext_clk_used;
  93
  94 static uint32_t bpp_to_pixfmt(struct fb_info *fbi)
  95 {
  96         uint32_t pixfmt = 0;
  97
  98         debug("bpp_to_pixfmt: %d\n", fbi->var.bits_per_pixel);
  99
 100         if (fbi->var.nonstd)
 101                 return fbi->var.nonstd;
 102
 103         switch (fbi->var.bits_per_pixel) {
 104         case 24:
 105                 pixfmt = IPU_PIX_FMT_BGR24;
 106                 break;
 107         case 32:
 108                 pixfmt = IPU_PIX_FMT_BGR32;
 109                 break;
 110         case 16:
 111                 pixfmt = IPU_PIX_FMT_RGB565;
 112                 break;
 113         case 8:
 114                 pixfmt = IPU_PIX_FMT_GENERIC;
 115         }
 116         return pixfmt;
 117 }
 118
 119 /*
 120  * Set fixed framebuffer parameters based on variable settings.
 121  *
 122  * @param       info     framebuffer information pointer
 123  */
 124 static int mxcfb_set_fix(struct fb_info *info)
 125 {
 126         struct fb_fix_screeninfo *fix = &info->fix;
 127         struct fb_var_screeninfo *var = &info->var;
 128
 129         fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
 130
 131         fix->type = FB_TYPE_PACKED_PIXELS;
 132         fix->accel = FB_ACCEL_NONE;
 133         fix->visual = FB_VISUAL_TRUECOLOR;
 134         fix->xpanstep = 1;
 135         fix->ypanstep = 1;
 136
 137         return 0;
 138 }
 139
 140 static int setup_disp_channel1(struct fb_info *fbi)
 141 {
 142         ipu_channel_params_t params;
 143         struct mxcfb_info *mxc_fbi = fbi->par;
 144
 145         memset(&params, 0, sizeof(params));
 146         params.mem_dp_bg_sync.di = mxc_fbi->ipu_di;
 147
 148         debug("%s called\n", __func__);
 149         /*
 150          * Assuming interlaced means yuv output, below setting also
 151          * valid for mem_dc_sync. FG should have the same vmode as BG.
 152          */
 153         if (fbi->var.vmode & FB_VMODE_INTERLACED) {
 154                 params.mem_dp_bg_sync.interlaced = 1;
 155                 params.mem_dp_bg_sync.out_pixel_fmt =
 156                         IPU_PIX_FMT_YUV444;
 157         } else {
 158                 if (mxc_fbi->ipu_di_pix_fmt) {
 159                         params.mem_dp_bg_sync.out_pixel_fmt =
 160                                 mxc_fbi->ipu_di_pix_fmt;
 161                 } else {
 162                         params.mem_dp_bg_sync.out_pixel_fmt =
 163                                 IPU_PIX_FMT_RGB666;
 164                 }
 165         }
 166         params.mem_dp_bg_sync.in_pixel_fmt = bpp_to_pixfmt(fbi);
 167         if (mxc_fbi->alpha_chan_en)
 168                 params.mem_dp_bg_sync.alpha_chan_en = 1;
 169
 170         ipu_init_channel(mxc_fbi->ipu_ch, &params);
 171
 172         return 0;
 173 }
 174
 175 static int setup_disp_channel2(struct fb_info *fbi)
 176 {
 177         int retval = 0;
 178         struct mxcfb_info *mxc_fbi = fbi->par;
 179
 180         mxc_fbi->cur_ipu_buf = 1;
 181         if (mxc_fbi->alpha_chan_en)
 182                 mxc_fbi->cur_ipu_alpha_buf = 1;
 183
 184         fbi->var.xoffset = fbi->var.yoffset = 0;
 185
 186         debug("%s: ch: %08x xres: %d yres: %d line_length: %d mem: %08lx .. %08lx\n",
 187                 __func__,
 188                 mxc_fbi->ipu_ch,
 189                 fbi->var.xres,
 190                 fbi->var.yres,
 191                 fbi->fix.line_length,
 192                 fbi->fix.smem_start,
 193                 fbi->fix.smem_start +
 194                 (fbi->fix.line_length * fbi->var.yres) - 1);
 195
 196         retval = ipu_init_channel_buffer(mxc_fbi->ipu_ch, IPU_INPUT_BUFFER,
 197                                          bpp_to_pixfmt(fbi),
 198                                          fbi->var.xres, fbi->var.yres,
 199                                          fbi->fix.line_length,
 200                                          fbi->fix.smem_start +
 201                                          (fbi->fix.line_length * fbi->var.yres),
 202                                          fbi->fix.smem_start,
 203                                          0, 0);
 204         if (retval)
 205                 printf("ipu_init_channel_buffer error %d\n", retval);
 206
 207         return retval;
 208 }
 209
 210 /*
 211  * Set framebuffer parameters and change the operating mode.
 212  *
 213  * @param       info     framebuffer information pointer
 214  */
 215 static int mxcfb_set_par(struct fb_info *fbi)
 216 {
 217         int retval = 0;
 218         u32 mem_len;
 219         ipu_di_signal_cfg_t sig_cfg;
 220         struct mxcfb_info *mxc_fbi = fbi->par;
 221         uint32_t out_pixel_fmt;
 222
 223         ipu_disable_channel(mxc_fbi->ipu_ch);
 224         ipu_uninit_channel(mxc_fbi->ipu_ch);
 225         mxcfb_set_fix(fbi);
 226
 227         mem_len = fbi->var.yres_virtual * fbi->fix.line_length;
 228         if (!fbi->fix.smem_start || (mem_len > fbi->fix.smem_len)) {
 229                 if (fbi->fix.smem_start)
 230                         mxcfb_unmap_video_memory(fbi);
 231
 232                 if (mxcfb_map_video_memory(fbi) < 0)
 233                         return -ENOMEM;
 234         }
 235
 236         setup_disp_channel1(fbi);
 237
 238         memset(&sig_cfg, 0, sizeof(sig_cfg));
 239         if (fbi->var.vmode & FB_VMODE_INTERLACED) {
 240                 sig_cfg.interlaced = 1;
 241                 out_pixel_fmt = IPU_PIX_FMT_YUV444;
 242         } else {
 243                 if (mxc_fbi->ipu_di_pix_fmt)
 244                         out_pixel_fmt = mxc_fbi->ipu_di_pix_fmt;
 245                 else
 246                         out_pixel_fmt = IPU_PIX_FMT_RGB666;
 247         }
 248         if (fbi->var.vmode & FB_VMODE_ODD_FLD_FIRST) /* PAL */
 249                 sig_cfg.odd_field_first = 1;
 250         if ((fbi->var.sync & FB_SYNC_EXT) || ext_clk_used)
 251                 sig_cfg.ext_clk = 1;
 252         if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT)
 253                 sig_cfg.Hsync_pol = 1;
 254         if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT)
 255                 sig_cfg.Vsync_pol = 1;
 256         if (!(fbi->var.sync & FB_SYNC_CLK_LAT_FALL))
 257                 sig_cfg.clk_pol = 1;
 258         if (fbi->var.sync & FB_SYNC_DATA_INVERT)
 259                 sig_cfg.data_pol = 1;
 260         if (!(fbi->var.sync & FB_SYNC_OE_LOW_ACT))
 261                 sig_cfg.enable_pol = 1;
 262         if (fbi->var.sync & FB_SYNC_CLK_IDLE_EN)
 263                 sig_cfg.clkidle_en = 1;
 264
 265         debug("pixclock = %lu.%03lu MHz\n",
 266                 PICOS2KHZ(fbi->var.pixclock) / 1000,
 267                 PICOS2KHZ(fbi->var.pixclock) % 1000);
 268
 269         retval = ipu_init_sync_panel(mxc_fbi->ipu_di,
 270                                 (PICOS2KHZ(fbi->var.pixclock)) * 1000UL,
 271                                 fbi->var.xres, fbi->var.yres,
 272                                 out_pixel_fmt,
 273                                 fbi->var.left_margin,
 274                                 fbi->var.hsync_len,
 275                                 fbi->var.right_margin,
 276                                 fbi->var.upper_margin,
 277                                 fbi->var.vsync_len,
 278                                 fbi->var.lower_margin,
 279                                 0, sig_cfg);
 280         if (retval != 0) {
 281                 printf("mxc_ipuv3_fb: Error %d initializing panel\n", retval);
 282                 return retval;
 283         }
 284
 285         retval = setup_disp_channel2(fbi);
 286         if (retval)
 287                 return retval;
 288
 289         if (mxc_fbi->blank == FB_BLANK_UNBLANK)
 290                 ipu_enable_channel(mxc_fbi->ipu_ch);
 291
 292         return retval;
 293 }
 294
 295 /*
 296  * Check framebuffer variable parameters and adjust to valid values.
 297  *
 298  * @param       var      framebuffer variable parameters
 299  *
 300  * @param       info     framebuffer information pointer
 301  */
 302 static int mxcfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 303 {
 304         u32 vtotal;
 305         u32 htotal;
 306
 307         if (var->xres_virtual < var->xres)
 308                 var->xres_virtual = var->xres;
 309         if (var->yres_virtual < var->yres)
 310                 var->yres_virtual = var->yres;
 311
 312         if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
 313             (var->bits_per_pixel != 16) && (var->bits_per_pixel != 8))
 314                 var->bits_per_pixel = default_bpp;
 315
 316         switch (var->bits_per_pixel) {
 317         case 8:
 318                 var->red.length = 3;
 319                 var->red.offset = 5;
 320                 var->red.msb_right = 0;
 321
 322                 var->green.length = 3;
 323                 var->green.offset = 2;
 324                 var->green.msb_right = 0;
 325
 326                 var->blue.length = 2;
 327                 var->blue.offset = 0;
 328                 var->blue.msb_right = 0;
 329
 330                 var->transp.length = 0;
 331                 var->transp.offset = 0;
 332                 var->transp.msb_right = 0;
 333                 break;
 334         case 16:
 335                 var->red.length = 5;
 336                 var->red.offset = 11;
 337                 var->red.msb_right = 0;
 338
 339                 var->green.length = 6;
 340                 var->green.offset = 5;
 341                 var->green.msb_right = 0;
 342
 343                 var->blue.length = 5;
 344                 var->blue.offset = 0;
 345                 var->blue.msb_right = 0;
 346
 347                 var->transp.length = 0;
 348                 var->transp.offset = 0;
 349                 var->transp.msb_right = 0;
 350                 break;
 351         case 24:
 352                 var->red.length = 8;
 353                 var->red.offset = 16;
 354                 var->red.msb_right = 0;
 355
 356                 var->green.length = 8;
 357                 var->green.offset = 8;
 358                 var->green.msb_right = 0;
 359
 360                 var->blue.length = 8;
 361                 var->blue.offset = 0;
 362                 var->blue.msb_right = 0;
 363
 364                 var->transp.length = 0;
 365                 var->transp.offset = 0;
 366                 var->transp.msb_right = 0;
 367                 break;
 368         case 32:
 369                 var->red.length = 8;
 370                 var->red.offset = 16;
 371                 var->red.msb_right = 0;
 372
 373                 var->green.length = 8;
 374                 var->green.offset = 8;
 375                 var->green.msb_right = 0;
 376
 377                 var->blue.length = 8;
 378                 var->blue.offset = 0;
 379                 var->blue.msb_right = 0;
 380
 381                 var->transp.length = 8;
 382                 var->transp.offset = 24;
 383                 var->transp.msb_right = 0;
 384                 break;
 385         }
 386
 387         if (var->pixclock < 1000) {
 388                 htotal = var->xres + var->right_margin + var->hsync_len +
 389                     var->left_margin;
 390                 vtotal = var->yres + var->lower_margin + var->vsync_len +
 391                     var->upper_margin;
 392                 var->pixclock = (vtotal * htotal * 6UL) / 100UL;
 393                 var->pixclock = KHZ2PICOS(var->pixclock);
 394                 printf("pixclock set for 60Hz refresh = %u ps\n",
 395                         var->pixclock);
 396         }
 397
 398         var->height = -1;
 399         var->width = -1;
 400         var->grayscale = 0;
 401
 402         return 0;
 403 }
 404
 405 static int mxcfb_map_video_memory(struct fb_info *fbi)
 406 {
 407         if (fbi->fix.smem_len < fbi->var.yres_virtual * fbi->fix.line_length) {
 408                 fbi->fix.smem_len = fbi->var.yres_virtual *
 409                                     fbi->fix.line_length;
 410         }
 411         if (gd->fb_base)
 412                 fbi->screen_base = (void *)gd->fb_base;
 413         else
 414                 fbi->screen_base = malloc(fbi->fix.smem_len);
 415         if (fbi->screen_base == NULL) {
 416                 puts("Unable to allocate framebuffer memory\n");
 417                 fbi->fix.smem_len = 0;
 418                 return -EBUSY;
 419         }
 420         fbi->fix.smem_start = (unsigned long)fbi->screen_base;
 421
 422         debug("allocated fb @ paddr=0x%08X, size=%d.\n",
 423                 (uint32_t) fbi->fix.smem_start, fbi->fix.smem_len);
 424
 425         fbi->screen_size = fbi->fix.smem_len;
 426
 427         return 0;
 428 }
 429
 430 static int mxcfb_unmap_video_memory(struct fb_info *fbi)
 431 {
 432         fbi->screen_base = 0;
 433         fbi->fix.smem_start = 0;
 434         fbi->fix.smem_len = 0;
 435         return 0;
 436 }
 437
 438 /*
 439  * Initializes the framebuffer information pointer. After allocating
 440  * sufficient memory for the framebuffer structure, the fields are
 441  * filled with custom information passed in from the configurable
 442  * structures.  This includes information such as bits per pixel,
 443  * color maps, screen width/height and RGBA offsets.
 444  *
 445  * @return      Framebuffer structure initialized with our information
 446  */
 447 static struct fb_info *mxcfb_init_fbinfo(void)
 448 {
 449         struct fb_info *fbi;
 450         struct mxcfb_info *mxcfbi;
 451         void *p;
 452         int size = ALIGN(sizeof(struct mxcfb_info), sizeof(long)) +
 453                 sizeof(struct fb_info);
 454
 455         debug("%s: %d %d %d\n",
 456                 __func__,
 457                 size,
 458                 sizeof(struct mxcfb_info),
 459                 sizeof(struct fb_info));
 460         /*
 461          * Allocate sufficient memory for the fb structure
 462          */
 463
 464         p = malloc(size);
 465         if (!p)
 466                 return NULL;
 467
 468         memset(p, 0, size);
 469
 470         fbi = p;
 471         fbi->par = p + ALIGN(sizeof(struct fb_info), sizeof(long));
 472
 473         mxcfbi = fbi->par;
 474         debug("Framebuffer structures at: fbi=%p mxcfbi=%p\n",
 475                 fbi, mxcfbi);
 476
 477         fbi->var.activate = FB_ACTIVATE_NOW;
 478
 479         fbi->flags = FBINFO_FLAG_DEFAULT;
 480         fbi->pseudo_palette = mxcfbi->pseudo_palette;
 481
 482         return fbi;
 483 }
 484
 485 /*
 486  * Probe routine for the framebuffer driver. It is called during the
 487  * driver binding process.      The following functions are performed in
 488  * this routine: Framebuffer initialization, Memory allocation and
 489  * mapping, Framebuffer registration, IPU initialization.
 490  *
 491  * @return      Appropriate error code to the kernel common code
 492  */
 493 static int mxcfb_probe(u32 interface_pix_fmt, struct fb_videomode *mode, int di)
 494 {
 495         struct fb_info *fbi;
 496         struct mxcfb_info *mxcfbi;
 497
 498         /*
 499          * Initialize FB structures
 500          */
 501         fbi = mxcfb_init_fbinfo();
 502         if (!fbi)
 503                 return -ENOMEM;
 504
 505         mxcfbi = fbi->par;
 506
 507         if (!g_dp_in_use) {
 508                 mxcfbi->ipu_ch = MEM_BG_SYNC;
 509                 mxcfbi->blank = FB_BLANK_UNBLANK;
 510         } else {
 511                 mxcfbi->ipu_ch = MEM_DC_SYNC;
 512                 mxcfbi->blank = FB_BLANK_POWERDOWN;
 513         }
 514
 515         mxcfbi->ipu_di = di;
 516
 517         ipu_disp_set_global_alpha(mxcfbi->ipu_ch, 1, 0x80);
 518         ipu_disp_set_color_key(mxcfbi->ipu_ch, 0, 0);
 519         strcpy(fbi->fix.id, "DISP3 BG");
 520
 521         g_dp_in_use = 1;
 522
 523         mxcfb_info[mxcfbi->ipu_di] = fbi;
 524
 525         /* Need dummy values until real panel is configured */
 526         fbi->var.xres = panel_info.vl_col;
 527         fbi->var.yres = panel_info.vl_row;
 528
 529         mxcfbi->ipu_di_pix_fmt = interface_pix_fmt;
 530         fb_videomode_to_var(&fbi->var, mode);
 531         fbi->var.bits_per_pixel = NBITS(panel_info.vl_bpix);
 532         fbi->fix.line_length = fbi->var.xres * (fbi->var.bits_per_pixel / 8);
 533         fbi->fix.smem_len = fbi->var.yres_virtual * fbi->fix.line_length;
 534
 535         mxcfb_check_var(&fbi->var, fbi);
 536
 537         /* Default Y virtual size is 2x panel size */
 538         fbi->var.yres_virtual = fbi->var.yres * 2;
 539
 540         mxcfb_set_fix(fbi);
 541
 542         /* allocate fb first */
 543         if (mxcfb_map_video_memory(fbi) < 0)
 544                 return -ENOMEM;
 545
 546         mxcfb_set_par(fbi);
 547
 548         lcd_line_length = (panel_info.vl_col * NBITS(panel_info.vl_bpix)) / 8;
 549
 550         debug("MXC IPUV3 configured\n"
 551                 "XRES = %d YRES = %d BitsXpixel = %d\n",
 552                 panel_info.vl_col,
 553                 panel_info.vl_row,
 554                 panel_info.vl_bpix);
 555
 556         ipu_dump_registers();
 557
 558         return 0;
 559 }
 560
 561 ulong calc_fbsize(void)
 562 {
 563         return (panel_info.vl_col * panel_info.vl_row *
 564                 NBITS(panel_info.vl_bpix)) / 8;
 565 }
 566
 567 int ipuv3_fb_init(struct fb_videomode *mode, int di, unsigned int interface_pix_fmt,
 568                 ipu_di_clk_parent_t di_clk_parent, unsigned long di_clk_val, int bpp)
 569 {
 570         int ret;
 571
 572         default_bpp = bpp;
 573
 574         ret = ipu_probe(di, di_clk_parent, di_clk_val);
 575         if (ret) {
 576                 printf("Error initializing IPU\n");
 577                 return ret;
 578         }
 579
 580         return mxcfb_probe(interface_pix_fmt, mode, di);
 581 }