src/add-ons/accelerants/via/ProposeDisplayMode.c

   1 /*
   2         Copyright 1999, Be Incorporated.   All Rights Reserved.
   3         This file may be used under the terms of the Be Sample Code License.
   4
   5         Other authors for NV driver:
   6         Mark Watson,
   7         Rudolf Cornelissen 9/2002-11/2005
   8 */
   9
  10 #define MODULE_BIT 0x00400000
  11
  12 #include "acc_std.h"
  13
  14 #define T_POSITIVE_SYNC (B_POSITIVE_HSYNC | B_POSITIVE_VSYNC)
  15 /* mode flags will be setup as status info by PROPOSEMODE! */
  16 #define MODE_FLAGS 0
  17 #define MODE_COUNT (sizeof (mode_list) / sizeof (display_mode))
  18
  19 /*some monitors only handle a fixed set of modes*/
  20 #include "valid_mode_list"
  21
  22 /* Standard VESA modes,
  23  * plus panel specific resolution modes which are internally modified during run-time depending on the requirements of the actual
  24  * panel connected. The modes as listed here, should timing-wise be as compatible with analog (CRT) monitors as can be... */
  25 static const display_mode mode_list[] = {
  26 /* 4:3 modes; 307.2k pixels */
  27 { { 25175, 640, 656, 752, 800, 480, 490, 492, 525, 0}, B_CMAP8, 640, 480, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@60Hz_(640X480X8.Z1) */
  28 { { 27500, 640, 672, 768, 864, 480, 488, 494, 530, 0}, B_CMAP8, 640, 480, 0, 0, MODE_FLAGS}, /* 640X480X60Hz */
  29 { { 30500, 640, 672, 768, 864, 480, 517, 523, 588, 0}, B_CMAP8, 640, 480, 0, 0, MODE_FLAGS}, /* SVGA_640X480X60HzNI */
  30 { { 31500, 640, 664, 704, 832, 480, 489, 492, 520, 0}, B_CMAP8, 640, 480, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@70-72Hz_(640X480X8.Z1) */
  31 { { 31500, 640, 656, 720, 840, 480, 481, 484, 500, 0}, B_CMAP8, 640, 480, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@75Hz_(640X480X8.Z1) */
  32 { { 36000, 640, 696, 752, 832, 480, 481, 484, 509, 0}, B_CMAP8, 640, 480, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@85Hz_(640X480X8.Z1) */
  33 /* 4:3 modes; 480k pixels */
  34 { { 36000, 800, 824, 896, 1024, 600, 601, 603, 625, 0}, B_CMAP8, 800, 600, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@56Hz_(800X600) from Be, Inc. driver + XFree86 */
  35 { { 38100, 800, 832, 960, 1088, 600, 602, 606, 620, 0}, B_CMAP8, 800, 600, 0, 0, MODE_FLAGS}, /* SVGA_800X600X56HzNI */
  36 { { 40000, 800, 840, 968, 1056, 600, 601, 605, 628, T_POSITIVE_SYNC}, B_CMAP8, 800, 600, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@60Hz_(800X600X8.Z1) + XFree86 */
  37 { { 49500, 800, 816, 896, 1056, 600, 601, 604, 625, T_POSITIVE_SYNC}, B_CMAP8, 800, 600, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@75Hz_(800X600X8.Z1) + XFree86 */
  38 { { 50000, 800, 856, 976, 1040, 600, 637, 643, 666, T_POSITIVE_SYNC}, B_CMAP8, 800, 600, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@70-72Hz_(800X600X8.Z1) + XFree86 */
  39 { { 56250, 800, 832, 896, 1048, 600, 601, 604, 631, T_POSITIVE_SYNC}, B_CMAP8, 800, 600, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@85Hz_(800X600X8.Z1) + XFree86 */
  40 /* 4:3 modes; 786.432k pixels */
  41 { { 65000, 1024, 1048, 1184, 1344, 768, 771, 777, 806, 0}, B_CMAP8, 1024, 768, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@60Hz_(1024X768X8.Z1) + XFree86 */
  42 { { 75000, 1024, 1048, 1184, 1328, 768, 771, 777, 806, 0}, B_CMAP8, 1024, 768, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@70-72Hz_(1024X768X8.Z1) + XFree86 */
  43 { { 78750, 1024, 1040, 1136, 1312, 768, 769, 772, 800, T_POSITIVE_SYNC}, B_CMAP8, 1024, 768, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@75Hz_(1024X768X8.Z1) + XFree86 */
  44 { { 94500, 1024, 1072, 1168, 1376, 768, 769, 772, 808, T_POSITIVE_SYNC}, B_CMAP8, 1024, 768, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@85Hz_(1024X768X8.Z1) + XFree86 */
  45 /* 4:3 modes; 995.328k pixels */
  46 { { 94200, 1152, 1184, 1280, 1472, 864, 865, 868, 914, T_POSITIVE_SYNC}, B_CMAP8, 1152, 864, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@70Hz_(1152X864X8.Z1) */
  47 { { 97800, 1152, 1216, 1344, 1552, 864, 865, 868, 900, T_POSITIVE_SYNC}, B_CMAP8, 1152, 864, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@70Hz_(1152X864X8.Z1) */
  48 { { 108000, 1152, 1216, 1344, 1600, 864, 865, 868, 900, T_POSITIVE_SYNC}, B_CMAP8, 1152, 864, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@75Hz_(1152X864X8.Z1) + XFree86 */
  49 { { 121500, 1152, 1216, 1344, 1568, 864, 865, 868, 911, T_POSITIVE_SYNC}, B_CMAP8, 1152, 864, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@85Hz_(1152X864X8.Z1) */
  50 /* 5:4 modes; 1.311M pixels */
  51 { { 108000, 1280, 1328, 1440, 1688, 1024, 1025, 1028, 1066, T_POSITIVE_SYNC}, B_CMAP8, 1280, 1024, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@60Hz_(1280X1024) from Be, Inc. driver + XFree86 */
  52 { { 135000, 1280, 1296, 1440, 1688, 1024, 1025, 1028, 1066, T_POSITIVE_SYNC}, B_CMAP8, 1280, 1024, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@75Hz_(1280X1024X8.Z1) + XFree86 */
  53 { { 157500, 1280, 1344, 1504, 1728, 1024, 1025, 1028, 1072, T_POSITIVE_SYNC}, B_CMAP8, 1280, 1024, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@85Hz_(1280X1024X8.Z1) + XFree86 */
  54 /* 4:3 panel mode; 1.47M pixels */
  55 { { 122600, 1400, 1488, 1640, 1880, 1050, 1051, 1054, 1087, T_POSITIVE_SYNC}, B_CMAP8, 1400, 1050, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@60Hz_(1400X1050) */
  56 /* 4:3 modes; 1.92M pixels */
  57 { { 162000, 1600, 1664, 1856, 2160, 1200, 1201, 1204, 1250, T_POSITIVE_SYNC}, B_CMAP8, 1600, 1200, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@60Hz_(1600X1200X8.Z1) + XFree86 */
  58 /* identical lines to above one, apart from refreshrate.. */
  59 { { 175500, 1600, 1664, 1856, 2160, 1200, 1201, 1204, 1250, T_POSITIVE_SYNC}, B_CMAP8, 1600, 1200, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@65Hz_(1600X1200X8.Z1) + XFree86 */
  60 { { 189000, 1600, 1664, 1856, 2160, 1200, 1201, 1204, 1250, T_POSITIVE_SYNC}, B_CMAP8, 1600, 1200, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@70Hz_(1600X1200X8.Z1) + XFree86 */
  61 { { 202500, 1600, 1664, 1856, 2160, 1200, 1201, 1204, 1250, T_POSITIVE_SYNC}, B_CMAP8, 1600, 1200, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@75Hz_(1600X1200X8.Z1) + XFree86 */
  62 { { 216000, 1600, 1664, 1856, 2160, 1200, 1201, 1204, 1250, T_POSITIVE_SYNC}, B_CMAP8, 1600, 1200, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@80Hz_(1600X1200X8.Z1) */
  63 { { 229500, 1600, 1664, 1856, 2160, 1200, 1201, 1204, 1250, T_POSITIVE_SYNC}, B_CMAP8, 1600, 1200, 0, 0, MODE_FLAGS},  /* Vesa_Monitor_@85Hz_(1600X1200X8.Z1) + XFree86 */
  64 /* end identical lines. */
  65 /* 4:3 modes; 2.408M pixels */
  66 { { 204750, 1792, 1920, 2120, 2448, 1344, 1345, 1348, 1394, B_POSITIVE_VSYNC}, B_CMAP8, 1792, 1344, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@60Hz_(1792X1344) from Be, Inc. driver + XFree86 */
  67 { { 261000, 1792, 1888, 2104, 2456, 1344, 1345, 1348, 1417, B_POSITIVE_VSYNC}, B_CMAP8, 1792, 1344, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@75Hz_(1792X1344) from Be, Inc. driver + XFree86 */
  68 /* 4:3 modes; 2.584M pixels */
  69 { { 218250, 1856, 1952, 2176, 2528, 1392, 1393, 1396, 1439, B_POSITIVE_VSYNC}, B_CMAP8, 1856, 1392, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@60Hz_(1856X1392) from Be, Inc. driver + XFree86 */
  70 { { 288000, 1856, 1984, 2208, 2560, 1392, 1393, 1396, 1500, B_POSITIVE_VSYNC}, B_CMAP8, 1856, 1392, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@75Hz_(1856X1392) from Be, Inc. driver + XFree86 */
  71 /* 4:3 modes; 2.765M pixels */
  72 { { 234000, 1920, 2048, 2256, 2600, 1440, 1441, 1444, 1500, B_POSITIVE_VSYNC}, B_CMAP8, 1920, 1440, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@60Hz_(1920X1440) from Be, Inc. driver + XFree86 */
  73 { { 297000, 1920, 2064, 2288, 2640, 1440, 1441, 1444, 1500, B_POSITIVE_VSYNC}, B_CMAP8, 1920, 1440, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@75Hz_(1920X1440) from Be, Inc. driver + XFree86 */
  74 /* 4:3 modes; 3.146M pixels */
  75 { { 266950, 2048, 2200, 2424, 2800, 1536, 1537, 1540, 1589, B_POSITIVE_VSYNC}, B_CMAP8, 2048, 1536, 0, 0, MODE_FLAGS}, /* From XFree86 posting @60Hz + XFree86 */
  76 /* 16:10 panel mode; 400k pixels */
  77 { { 31300, 800, 848, 928, 1008, 500, 501, 504, 518, T_POSITIVE_SYNC}, B_CMAP8, 800, 500, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@60Hz_(800X500) */
  78 /* 16:10 panel mode; 655.36k pixels */
  79 { { 52800, 1024, 1072, 1176, 1328, 640, 641, 644, 663, T_POSITIVE_SYNC}, B_CMAP8, 1024, 640, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@60Hz_(1024X640) */
  80 /* 16:10 panel-TV mode; 983.04k pixels */
  81 { { 80135, 1280, 1344, 1480, 1680, 768, 769, 772, 795, T_POSITIVE_SYNC}, B_CMAP8, 1280, 768, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@60Hz_(1280X768) */
  82 /* 16:10 panel mode; 1.024M pixels */
  83 { { 83500, 1280, 1344, 1480, 1680, 800, 801, 804, 828, T_POSITIVE_SYNC}, B_CMAP8, 1280, 800, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@60Hz_(1280X800) */
  84 /* 16:10 panel mode; 1.296M pixels */
  85 { { 106500, 1440, 1520, 1672, 1904, 900, 901, 904, 932, T_POSITIVE_SYNC}, B_CMAP8, 1440, 900, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@60Hz_(1440X900) */
  86 /* 16:10 panel mode; 1.764M pixels */
  87 { { 147100, 1680, 1784, 1968, 2256, 1050, 1051, 1054, 1087, T_POSITIVE_SYNC}, B_CMAP8, 1680, 1050, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@60Hz_(1680X1050) */
  88 /* 16:10 panel mode; 2.304M pixels */
  89 { { 193200, 1920, 2048, 2256, 2592, 1200, 1201, 1204, 1242, T_POSITIVE_SYNC}, B_CMAP8, 1920, 1200, 0, 0, MODE_FLAGS}, /* Vesa_Monitor_@60Hz_(1920X1200) */
  90 };
  91
  92 /*
  93 Check mode is between low and high limits
  94 returns:
  95         B_OK - found one
  96         B_BAD_VALUE - mode can be made, but outside limits
  97         B_ERROR - not possible
  98 */
  99 /* BOUNDS WARNING:
 100  * BeOS (tested R5.0.3PE) is failing BWindowScreen.SetFrameBuffer() if PROPOSEMODE
 101  * returns B_BAD_VALUE. It's called by the OS with target, low and high set to
 102  * have the same settings for BWindowScreen!
 103  * Which means we should not return B_BAD_VALUE on anything except for deviations on:
 104  * display_mode.virtual_width;
 105  * display_mode.virtual_height;
 106  * display_mode.timing.h_display;
 107  * display_mode.timing.v_display;
 108  */
 109 /* Note:
 110  * The target mode should be modified to correspond to the mode as it can be made. */
 111 status_t PROPOSE_DISPLAY_MODE(display_mode *target, const display_mode *low, const display_mode *high)
 112 {
 113         status_t status = B_OK;
 114         float pix_clock_found, target_aspect;
 115         uint8 m,n,p, bpp;
 116         status_t result;
 117         uint32 max_vclk, row_bytes, pointer_reservation;
 118         bool acc_mode;
 119         double target_refresh = ((double)target->timing.pixel_clock * 1000.0) /
 120                         (
 121                                 (double)target->timing.h_total *
 122                                 (double)target->timing.v_total
 123                         );
 124         bool
 125                 want_same_width = target->timing.h_display == target->virtual_width,
 126                 want_same_height = target->timing.v_display == target->virtual_height;
 127
 128         LOG(1, ("PROPOSEMODE: (ENTER) requested virtual_width %d, virtual_height %d\n",
 129                                                                         target->virtual_width, target->virtual_height));
 130
 131         /*check valid list:
 132                 if (VALID_REQUIRED is set)
 133                 {
 134                         if (find modes with same size)
 135                         {
 136                                 pick one with nearest pixel clock
 137                         }
 138                         else
 139                         {
 140                                 pick next largest with nearest pixel clock and modify visible portion as far as possible
 141                         }
 142                 }
 143         */
 144         #ifdef VALID_MODE_REQUIRED
 145         {
 146                 int i;
 147                 int closest_mode_ptr;
 148                 uint32 closest_mode_clock;
 149
 150                 LOG(1, ("PROPOSEMODE: valid mode required!\n"));
 151
 152                 closest_mode_ptr = 0xbad;
 153                 closest_mode_clock = 0;
 154                 for (i=0;i<VALID_MODES;i++)
 155                 {
 156                         /*check size is ok and clock is better than any found before*/
 157                         if(
 158                                 target->timing.h_display==valid_mode_list[i].h_display &&
 159                                 target->timing.v_display==valid_mode_list[i].v_display
 160                         )
 161                         {
 162                                 if (
 163                                         abs(valid_mode_list[i].pixel_clock-target->timing.pixel_clock)<
 164                                         abs(closest_mode_clock-target->timing.pixel_clock)
 165                                 )
 166                                 {
 167                                         closest_mode_clock=valid_mode_list[i].pixel_clock;
 168                                         closest_mode_ptr=i;
 169                                 }
 170                         }
 171                 }
 172
 173                 if (closest_mode_ptr==0xbad)/*if no modes of correct size*/
 174                 {
 175                         LOG(4, ("PROPOSEMODE: no valid mode found, aborted.\n"));
 176                         return B_ERROR;
 177                 }
 178                 else
 179                 {
 180                         target->timing=valid_mode_list[closest_mode_ptr];
 181                         target_refresh = ((double)target->timing.pixel_clock * 1000.0) /  /*I require this refresh*/
 182                         ((double)target->timing.h_total * (double)target->timing.v_total);
 183                 }
 184         }
 185         #endif
 186
 187         /*find a nearby valid timing from that given*/
 188         result = head1_validate_timing
 189         (
 190                 &target->timing.h_display, &target->timing.h_sync_start, &target->timing.h_sync_end, &target->timing.h_total,
 191                 &target->timing.v_display, &target->timing.v_sync_start, &target->timing.v_sync_end, &target->timing.v_total
 192         );
 193         if (result == B_ERROR)
 194         {
 195                 LOG(4, ("PROPOSEMODE: could not validate timing, aborted.\n"));
 196                 return result;
 197         }
 198
 199         /* check if all connected output devices can display the requested mode's aspect: */
 200         /* calculate display mode aspect */
 201         target_aspect = (target->timing.h_display / ((float)target->timing.v_display));
 202         /* NOTE:
 203          * allow 0.10 difference so 5:4 aspect panels will be able to use 4:3 aspect modes! */
 204         switch (si->ps.monitors)
 205         {
 206         case 0x01: /* digital panel on head 1, nothing on head 2 */
 207                 if (si->ps.panel1_aspect < (target_aspect - 0.10))
 208                 {
 209                         LOG(4, ("PROPOSEMODE: connected panel1 is not widescreen type, aborted.\n"));
 210                         return B_ERROR;
 211                 }
 212                 break;
 213         case 0x10: /* nothing on head 1, digital panel on head 2 */
 214                 if (si->ps.panel2_aspect < (target_aspect - 0.10))
 215                 {
 216                         LOG(4, ("PROPOSEMODE: connected panel2 is not widescreen type, aborted.\n"));
 217                         return B_ERROR;
 218                 }
 219                 break;
 220         case 0x11: /* digital panels on both heads */
 221                 if ((si->ps.panel1_aspect < (target_aspect - 0.10)) ||
 222                         (si->ps.panel2_aspect < (target_aspect - 0.10)))
 223                 {
 224                         LOG(4, ("PROPOSEMODE: not all connected panels are widescreen type, aborted.\n"));
 225                         return B_ERROR;
 226                 }
 227                 break;
 228         default: /* at least one analog monitor is connected, or nothing detected at all */
 229                 if (target_aspect > 1.34)
 230                 {
 231                         LOG(4, ("PROPOSEMODE: not all output devices can display widescreen modes, aborted.\n"));
 232                         return B_ERROR;
 233                 }
 234                 break;
 235         }
 236
 237         /* only export widescreen panel-TV modes when an exact resolution match exists,
 238          * to prevent the modelist from becoming too crowded */
 239         if (target_aspect > 1.61)
 240         {
 241                 status_t panel_TV_stat = B_ERROR;
 242
 243                 if (si->ps.tmds1_active)
 244                 {
 245                         if ((target->timing.h_display == si->ps.p1_timing.h_display) &&
 246                                 (target->timing.v_display == si->ps.p1_timing.v_display))
 247                         {
 248                                 panel_TV_stat = B_OK;
 249                         }
 250                 }
 251                 if (si->ps.tmds2_active)
 252                 {
 253                         if ((target->timing.h_display == si->ps.p2_timing.h_display) &&
 254                                 (target->timing.v_display == si->ps.p2_timing.v_display))
 255                         {
 256                                 panel_TV_stat = B_OK;
 257                         }
 258                 }
 259                 if (panel_TV_stat != B_OK)
 260                 {
 261                         LOG(4, ("PROPOSEMODE: WS panel_TV mode requested but no such TV here, aborted.\n"));
 262                         return B_ERROR;
 263                 }
 264         }
 265
 266         /* check if panel(s) can display the requested resolution (if connected) */
 267         if (si->ps.tmds1_active)
 268         {
 269                 if ((target->timing.h_display > si->ps.p1_timing.h_display) ||
 270                         (target->timing.v_display > si->ps.p1_timing.v_display))
 271                 {
 272                         LOG(4, ("PROPOSEMODE: panel1 can't display requested resolution, aborted.\n"));
 273                         return B_ERROR;
 274                 }
 275         }
 276         if (si->ps.tmds2_active)
 277         {
 278                 if ((target->timing.h_display > si->ps.p2_timing.h_display) ||
 279                         (target->timing.v_display > si->ps.p2_timing.v_display))
 280                 {
 281                         LOG(4, ("PROPOSEMODE: panel2 can't display requested resolution, aborted.\n"));
 282                         return B_ERROR;
 283                 }
 284         }
 285
 286         /* validate display vs. virtual */
 287         if ((target->timing.h_display > target->virtual_width) || want_same_width)
 288                 target->virtual_width = target->timing.h_display;
 289         if ((target->timing.v_display > target->virtual_height) || want_same_height)
 290                 target->virtual_height = target->timing.v_display;
 291
 292         /* nail virtual size and 'subsequently' calculate rowbytes */
 293         result = eng_general_validate_pic_size (target, &row_bytes, &acc_mode);
 294         if (result == B_ERROR)
 295         {
 296                 LOG(4, ("PROPOSEMODE: could not validate virtual picture size, aborted.\n"));
 297                 return result;
 298         }
 299
 300         /*check if virtual_width is still within the requested limits*/
 301         if ((target->virtual_width < low->virtual_width) ||
 302                 (target->virtual_width > high->virtual_width))
 303         {
 304                 status = B_BAD_VALUE;
 305                 LOG(4, ("PROPOSEMODE: WARNING: virtual_width deviates too much\n"));
 306         }
 307
 308         /*check if timing found is within the requested horizontal limits*/
 309         if ((target->timing.h_display < low->timing.h_display) ||
 310                 (target->timing.h_display > high->timing.h_display) ||
 311                 (target->timing.h_sync_start < low->timing.h_sync_start) ||
 312                 (target->timing.h_sync_start > high->timing.h_sync_start) ||
 313                 (target->timing.h_sync_end < low->timing.h_sync_end) ||
 314                 (target->timing.h_sync_end > high->timing.h_sync_end) ||
 315                 (target->timing.h_total < low->timing.h_total) ||
 316                 (target->timing.h_total > high->timing.h_total))
 317         {
 318                 /* BWindowScreen workaround: we accept everything except h_display deviations */
 319                 if ((target->timing.h_display < low->timing.h_display) ||
 320                         (target->timing.h_display > high->timing.h_display))
 321                 {
 322                         status = B_BAD_VALUE;
 323                 }
 324                 LOG(4, ("PROPOSEMODE: WARNING: horizontal timing deviates too much\n"));
 325         }
 326
 327         /*check if timing found is within the requested vertical limits*/
 328         if (
 329                 (target->timing.v_display < low->timing.v_display) ||
 330                 (target->timing.v_display > high->timing.v_display) ||
 331                 (target->timing.v_sync_start < low->timing.v_sync_start) ||
 332                 (target->timing.v_sync_start > high->timing.v_sync_start) ||
 333                 (target->timing.v_sync_end < low->timing.v_sync_end) ||
 334                 (target->timing.v_sync_end > high->timing.v_sync_end) ||
 335                 (target->timing.v_total < low->timing.v_total) ||
 336                 (target->timing.v_total > high->timing.v_total)
 337         )
 338         {
 339                 /* BWindowScreen workaround: we accept everything except v_display deviations */
 340                 if ((target->timing.v_display < low->timing.v_display) ||
 341                         (target->timing.v_display > high->timing.v_display))
 342                 {
 343                         status = B_BAD_VALUE;
 344                 }
 345                 LOG(4, ("PROPOSEMODE: WARNING: vertical timing deviates too much\n"));
 346         }
 347
 348         /* adjust pixelclock for possible timing modifications done above */
 349         target->timing.pixel_clock = target_refresh * ((double)target->timing.h_total) * ((double)target->timing.v_total) / 1000.0;
 350
 351         /* Now find the nearest valid pixelclock we actually can setup for the target mode,
 352          * this also makes sure we don't generate more pixel bandwidth than the device can handle */
 353         /* calculate settings, but do not actually test anything (that costs too much time!) */
 354         result = head1_pix_pll_find(*target,&pix_clock_found,&m,&n,&p,0);
 355         /* update the target mode */
 356         target->timing.pixel_clock = (pix_clock_found * 1000);
 357
 358         /* note if we fell outside the limits */
 359         if ((target->timing.pixel_clock < low->timing.pixel_clock) ||
 360                 (target->timing.pixel_clock > high->timing.pixel_clock)
 361         )
 362         {
 363                 /* BWindowScreen workaround: we accept deviations <= 1Mhz */
 364                 if ((target->timing.pixel_clock < (low->timing.pixel_clock - 1000)) ||
 365                         (target->timing.pixel_clock > (high->timing.pixel_clock + 1000)))
 366                 {
 367                         status = B_BAD_VALUE;
 368                 }
 369                 LOG(4, ("PROPOSEMODE: WARNING: pixelclock deviates too much\n"));
 370         }
 371
 372         /* checkout space needed for hardcursor (if any) */
 373         pointer_reservation = 0;
 374         if (si->settings.hardcursor) pointer_reservation = 2048;
 375         /* memory requirement for frame buffer */
 376         if ((row_bytes * target->virtual_height) >
 377                 (si->ps.memory_size - pointer_reservation))
 378         {
 379                 target->virtual_height =
 380                         (si->ps.memory_size - pointer_reservation) / row_bytes;
 381         }
 382         if (target->virtual_height < target->timing.v_display)
 383         {
 384                 LOG(4,("PROPOSEMODE: not enough memory for current mode, aborted.\n"));
 385                 return B_ERROR;
 386         }
 387         LOG(4,("PROPOSEMODE: validated virtual_width %d, virtual_height %d pixels\n",
 388                 target->virtual_width, target->virtual_height));
 389
 390         if ((target->virtual_height < low->virtual_height) ||
 391                 (target->virtual_height > high->virtual_height))
 392         {
 393                 status = B_BAD_VALUE;
 394                 LOG(4, ("PROPOSEMODE: WARNING: virtual_height deviates too much\n"));
 395         }
 396
 397         /* setup status flags */
 398         LOG(1, ("PROPOSEMODE: initial modeflags: $%08x\n", target->flags));
 399         /* preset to singlehead card without TVout, no overlay support and no hardcursor.
 400          * also advice system that app_server and acc engine may touch the framebuffer
 401          * simultaneously (fixed). */
 402         target->flags &=
 403                 ~(DUALHEAD_CAPABLE | TV_CAPABLE | B_SUPPORTS_OVERLAYS | B_HARDWARE_CURSOR | B_IO_FB_NA);
 404         /* we always allow parallel access (fixed), the DAC is always in 'enhanced'
 405          * mode (fixed), and all modes support DPMS (fixed);
 406          * We support scrolling and panning in every mode, so we 'send a signal' to
 407          * BWindowScreen.CanControlFrameBuffer() by setting B_SCROLL.  */
 408         /* BTW: B_PARALLEL_ACCESS in combination with a hardcursor enables
 409          * BDirectWindow windowed modes. */
 410         target->flags |= (B_PARALLEL_ACCESS | B_8_BIT_DAC | B_DPMS | B_SCROLL);
 411
 412         /* determine the 'would be' max. pixelclock for the second DAC for the current videomode if dualhead were activated */
 413         switch (target->space)
 414         {
 415                 case B_CMAP8:
 416                         max_vclk = si->ps.max_dac2_clock_8;
 417                         bpp = 1;
 418                         break;
 419                 case B_RGB15_LITTLE:
 420                 case B_RGB16_LITTLE:
 421                         max_vclk = si->ps.max_dac2_clock_16;
 422                         bpp = 2;
 423                         break;
 424                 case B_RGB24_LITTLE:
 425                         max_vclk = si->ps.max_dac2_clock_24;
 426                         bpp = 3;
 427                         break;
 428                 case B_RGB32_LITTLE:
 429                         max_vclk = si->ps.max_dac2_clock_32dh;
 430                         bpp = 4;
 431                         break;
 432                 default:
 433                         /* use fail-safe value */
 434                         max_vclk = si->ps.max_dac2_clock_32dh;
 435                         bpp = 4;
 436                         break;
 437         }
 438
 439         /* set DUALHEAD_CAPABLE if suitable */
 440         //fixme: update for independant secondary head use! (reserve fixed memory then)
 441         if (si->ps.secondary_head && (target->timing.pixel_clock <= (max_vclk * 1000)))
 442         {
 443                 switch (target->flags & DUALHEAD_BITS)
 444                 {
 445                 case DUALHEAD_ON:
 446                 case DUALHEAD_SWITCH:
 447                         if (((si->ps.memory_size - pointer_reservation) >=
 448                                         (row_bytes * target->virtual_height)) &&
 449                                 ((uint16)(row_bytes / bpp) >= (target->timing.h_display * 2)))
 450                         {
 451                                 target->flags |= DUALHEAD_CAPABLE;
 452                         }
 453                         break;
 454                 case DUALHEAD_CLONE:
 455                         if ((si->ps.memory_size - pointer_reservation) >=
 456                                         (row_bytes * target->virtual_height))
 457                         {
 458                                 target->flags |= DUALHEAD_CAPABLE;
 459                         }
 460                         break;
 461                 case DUALHEAD_OFF:
 462                         if ((si->ps.memory_size - pointer_reservation) >=
 463                                         (row_bytes * target->virtual_height * 2))
 464                         {
 465                                 target->flags |= DUALHEAD_CAPABLE;
 466                         }
 467                         break;
 468                 }
 469         }
 470
 471         /* set TV_CAPABLE if suitable: pixelclock is not important (defined by TVstandard) */
 472         //fixme: modify for G100 and G200 TVout later on...
 473         if (target->flags & DUALHEAD_CAPABLE)
 474         {
 475                 if (si->ps.tvout &&
 476                         (target->timing.h_display <= 1024) &&
 477                         (target->timing.v_display <= 768))
 478                 {
 479                         target->flags |= TV_CAPABLE;
 480                 }
 481         }
 482
 483         /* set HARDWARE_CURSOR mode if suitable */
 484         if (si->settings.hardcursor)
 485                 target->flags |= B_HARDWARE_CURSOR;
 486
 487         /* set SUPPORTS_OVERLAYS */
 488         target->flags |= B_SUPPORTS_OVERLAYS;
 489
 490         LOG(1, ("PROPOSEMODE: validated status modeflags: $%08x\n", target->flags));
 491
 492         /* overrule timing command flags to be (fixed) blank_pedestal = 0.0IRE,
 493          * progressive scan (fixed), and sync_on_green not avaible. */
 494         target->timing.flags &= ~(B_BLANK_PEDESTAL | B_TIMING_INTERLACED | B_SYNC_ON_GREEN);
 495         /* The HSYNC and VSYNC command flags are actually executed by the driver. */
 496
 497         if (status == B_OK)     LOG(4, ("PROPOSEMODE: completed successfully.\n"));
 498         else LOG(4, ("PROPOSEMODE: mode can be made, but outside given limits.\n"));
 499         return status;
 500 }
 501
 502 /* Return the number of modes this device will return from GET_MODE_LIST().
 503         This is precalculated in create_mode_list (called from InitAccelerant stuff)
 504 */
 505 uint32 ACCELERANT_MODE_COUNT(void)
 506 {
 507         LOG(1, ("ACCELERANT_MODE_COUNT: the modelist contains %d modes\n",si->mode_count));
 508
 509         return si->mode_count;
 510 }
 511
 512 /* Copy the list of guaranteed supported video modes to the location provided.*/
 513 status_t GET_MODE_LIST(display_mode *dm)
 514 {
 515         LOG(1, ("GET_MODE_LIST: exporting the modelist created before.\n"));
 516
 517         memcpy(dm, my_mode_list, si->mode_count * sizeof(display_mode));
 518         return B_OK;
 519 }
 520
 521 /* Create a list of display_modes to pass back to the caller.*/
 522 status_t create_mode_list(void)
 523 {
 524         size_t max_size;
 525         uint32
 526                 i, j,
 527                 pix_clk_range;
 528         const display_mode
 529                 *src;
 530         display_mode
 531                 *dst,
 532                 low,
 533                 high;
 534
 535         color_space spaces[4] = {B_RGB32_LITTLE,B_RGB16_LITTLE,B_RGB15_LITTLE,B_CMAP8};
 536
 537         /* figure out how big the list could be, and adjust up to nearest multiple of B_PAGE_SIZE */
 538         max_size = (((MODE_COUNT * 4) * sizeof(display_mode)) + (B_PAGE_SIZE-1)) & ~(B_PAGE_SIZE-1);
 539         /* create an area to hold the info */
 540         si->mode_area = my_mode_list_area =
 541                 create_area("NV accelerant mode info", (void **)&my_mode_list, B_ANY_ADDRESS, max_size, B_NO_LOCK, B_READ_AREA | B_WRITE_AREA);
 542         if (my_mode_list_area < B_OK) return my_mode_list_area;
 543
 544         /* walk through our predefined list and see which modes fit this device */
 545         src = mode_list;
 546         dst = my_mode_list;
 547         si->mode_count = 0;
 548         for (i = 0; i < MODE_COUNT; i++)
 549         {
 550                 /* set ranges for acceptable values */
 551                 low = high = *src;
 552                 /* range is 6.25% of default clock: arbitrarily picked */
 553                 pix_clk_range = low.timing.pixel_clock >> 5;
 554                 low.timing.pixel_clock -= pix_clk_range;
 555                 high.timing.pixel_clock += pix_clk_range;
 556                 /* 'some cards need wider virtual widths for certain modes':
 557                  * Not true. They might need a wider pitch, but this is _not_ reflected in
 558                  * virtual_width, but in fbc.bytes_per_row. */
 559                 //So disable next line:
 560                 //high.virtual_width = 4096;
 561                 /* do it once for each depth we want to support */
 562                 for (j = 0; j < (sizeof(spaces) / sizeof(color_space)); j++)
 563                 {
 564                         /* set target values */
 565                         *dst = *src;
 566                         /* poke the specific space */
 567                         dst->space = low.space = high.space = spaces[j];
 568                         /* ask for a compatible mode */
 569                         /* We have to check for B_OK, because otherwise the pix_clk_range
 570                          * won't be taken into account!! */
 571                         //So don't do this:
 572                         //if (PROPOSE_DISPLAY_MODE(dst, &low, &high) != B_ERROR) {
 573                         //Instead, do this:
 574                         if (PROPOSE_DISPLAY_MODE(dst, &low, &high) == B_OK) {
 575                                 /* count it, and move on to next mode */
 576                                 dst++;
 577                                 si->mode_count++;
 578                         }
 579                 }
 580                 /* advance to next mode */
 581                 src++;
 582         }
 583
 584         return B_OK;
 585 }