drivers/video/fbdev/aty/radeon_monitor.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include "radeonfb.h"
   3
   4 #include <linux/slab.h>
   5
   6 #include "../edid.h"
   7
   8 static const struct fb_var_screeninfo radeonfb_default_var = {
   9         .xres           = 640,
  10         .yres           = 480,
  11         .xres_virtual   = 640,
  12         .yres_virtual   = 480,
  13         .bits_per_pixel = 8,
  14         .red            = { .length = 8 },
  15         .green          = { .length = 8 },
  16         .blue           = { .length = 8 },
  17         .activate       = FB_ACTIVATE_NOW,
  18         .height         = -1,
  19         .width          = -1,
  20         .pixclock       = 39721,
  21         .left_margin    = 40,
  22         .right_margin   = 24,
  23         .upper_margin   = 32,
  24         .lower_margin   = 11,
  25         .hsync_len      = 96,
  26         .vsync_len      = 2,
  27         .vmode          = FB_VMODE_NONINTERLACED
  28 };
  29
  30 static char *radeon_get_mon_name(int type)
  31 {
  32         char *pret = NULL;
  33
  34         switch (type) {
  35                 case MT_NONE:
  36                         pret = "no";
  37                         break;
  38                 case MT_CRT:
  39                         pret = "CRT";
  40                         break;
  41                 case MT_DFP:
  42                         pret = "DFP";
  43                         break;
  44                 case MT_LCD:
  45                         pret = "LCD";
  46                         break;
  47                 case MT_CTV:
  48                         pret = "CTV";
  49                         break;
  50                 case MT_STV:
  51                         pret = "STV";
  52                         break;
  53         }
  54
  55         return pret;
  56 }
  57
  58
  59 #if defined(CONFIG_PPC) || defined(CONFIG_SPARC)
  60 /*
  61  * Try to find monitor informations & EDID data out of the Open Firmware
  62  * device-tree. This also contains some "hacks" to work around a few machine
  63  * models with broken OF probing by hard-coding known EDIDs for some Mac
  64  * laptops internal LVDS panel. (XXX: not done yet)
  65  */
  66 static int radeon_parse_montype_prop(struct device_node *dp, u8 **out_EDID,
  67                                      int hdno)
  68 {
  69         static char *propnames[] = { "DFP,EDID", "LCD,EDID", "EDID",
  70                                      "EDID1", "EDID2",  NULL };
  71         const u8 *pedid = NULL;
  72         const u8 *pmt = NULL;
  73         u8 *tmp;
  74         int i, mt = MT_NONE;
  75
  76         pr_debug("analyzing OF properties...\n");
  77         pmt = of_get_property(dp, "display-type", NULL);
  78         if (!pmt)
  79                 return MT_NONE;
  80         pr_debug("display-type: %s\n", pmt);
  81         /* OF says "LCD" for DFP as well, we discriminate from the caller of this
  82          * function
  83          */
  84         if (!strcmp(pmt, "LCD") || !strcmp(pmt, "DFP"))
  85                 mt = MT_DFP;
  86         else if (!strcmp(pmt, "CRT"))
  87                 mt = MT_CRT;
  88         else {
  89                 if (strcmp(pmt, "NONE") != 0)
  90                         printk(KERN_WARNING "radeonfb: Unknown OF display-type: %s\n",
  91                                pmt);
  92                 return MT_NONE;
  93         }
  94
  95         for (i = 0; propnames[i] != NULL; ++i) {
  96                 pedid = of_get_property(dp, propnames[i], NULL);
  97                 if (pedid != NULL)
  98                         break;
  99         }
 100         /* We didn't find the EDID in the leaf node, some cards will actually
 101          * put EDID1/EDID2 in the parent, look for these (typically M6 tipb).
 102          * single-head cards have hdno == -1 and skip this step
 103          */
 104         if (pedid == NULL && dp->parent && (hdno != -1))
 105                 pedid = of_get_property(dp->parent,
 106                                 (hdno == 0) ? "EDID1" : "EDID2", NULL);
 107         if (pedid == NULL && dp->parent && (hdno == 0))
 108                 pedid = of_get_property(dp->parent, "EDID", NULL);
 109         if (pedid == NULL)
 110                 return mt;
 111
 112         tmp = kmemdup(pedid, EDID_LENGTH, GFP_KERNEL);
 113         if (!tmp)
 114                 return mt;
 115         *out_EDID = tmp;
 116         return mt;
 117 }
 118
 119 static int radeon_probe_OF_head(struct radeonfb_info *rinfo, int head_no,
 120                                 u8 **out_EDID)
 121 {
 122         struct device_node *dp;
 123
 124         pr_debug("radeon_probe_OF_head\n");
 125
 126         dp = rinfo->of_node;
 127         while (dp == NULL)
 128                 return MT_NONE;
 129
 130         if (rinfo->has_CRTC2) {
 131                 const char *pname;
 132                 int len, second = 0;
 133
 134                 dp = dp->child;
 135                 do {
 136                         if (!dp)
 137                                 return MT_NONE;
 138                         pname = of_get_property(dp, "name", NULL);
 139                         if (!pname)
 140                                 return MT_NONE;
 141                         len = strlen(pname);
 142                         pr_debug("head: %s (letter: %c, head_no: %d)\n",
 143                                pname, pname[len-1], head_no);
 144                         if (pname[len-1] == 'A' && head_no == 0) {
 145                                 int mt = radeon_parse_montype_prop(dp, out_EDID, 0);
 146                                 /* Maybe check for LVDS_GEN_CNTL here ? I need to check out
 147                                  * what OF does when booting with lid closed
 148                                  */
 149                                 if (mt == MT_DFP && rinfo->is_mobility)
 150                                         mt = MT_LCD;
 151                                 return mt;
 152                         } else if (pname[len-1] == 'B' && head_no == 1)
 153                                 return radeon_parse_montype_prop(dp, out_EDID, 1);
 154                         second = 1;
 155                         dp = dp->sibling;
 156                 } while(!second);
 157         } else {
 158                 if (head_no > 0)
 159                         return MT_NONE;
 160                 return radeon_parse_montype_prop(dp, out_EDID, -1);
 161         }
 162         return MT_NONE;
 163 }
 164 #endif /* CONFIG_PPC || CONFIG_SPARC */
 165
 166
 167 static int radeon_get_panel_info_BIOS(struct radeonfb_info *rinfo)
 168 {
 169         unsigned long tmp, tmp0;
 170         char stmp[30];
 171         int i;
 172
 173         if (!rinfo->bios_seg)
 174                 return 0;
 175
 176         if (!(tmp = BIOS_IN16(rinfo->fp_bios_start + 0x40))) {
 177                 printk(KERN_ERR "radeonfb: Failed to detect DFP panel info using BIOS\n");
 178                 rinfo->panel_info.pwr_delay = 200;
 179                 return 0;
 180         }
 181
 182         for(i=0; i<24; i++)
 183                 stmp[i] = BIOS_IN8(tmp+i+1);
 184         stmp[24] = 0;
 185         printk("radeonfb: panel ID string: %s\n", stmp);
 186         rinfo->panel_info.xres = BIOS_IN16(tmp + 25);
 187         rinfo->panel_info.yres = BIOS_IN16(tmp + 27);
 188         printk("radeonfb: detected LVDS panel size from BIOS: %dx%d\n",
 189                 rinfo->panel_info.xres, rinfo->panel_info.yres);
 190
 191         rinfo->panel_info.pwr_delay = BIOS_IN16(tmp + 44);
 192         pr_debug("BIOS provided panel power delay: %d\n", rinfo->panel_info.pwr_delay);
 193         if (rinfo->panel_info.pwr_delay > 2000 || rinfo->panel_info.pwr_delay <= 0)
 194                 rinfo->panel_info.pwr_delay = 2000;
 195
 196         /*
 197          * Some panels only work properly with some divider combinations
 198          */
 199         rinfo->panel_info.ref_divider = BIOS_IN16(tmp + 46);
 200         rinfo->panel_info.post_divider = BIOS_IN8(tmp + 48);
 201         rinfo->panel_info.fbk_divider = BIOS_IN16(tmp + 49);
 202         if (rinfo->panel_info.ref_divider != 0 &&
 203             rinfo->panel_info.fbk_divider > 3) {
 204                 rinfo->panel_info.use_bios_dividers = 1;
 205                 printk(KERN_INFO "radeondb: BIOS provided dividers will be used\n");
 206                 pr_debug("ref_divider = %x\n", rinfo->panel_info.ref_divider);
 207                 pr_debug("post_divider = %x\n", rinfo->panel_info.post_divider);
 208                 pr_debug("fbk_divider = %x\n", rinfo->panel_info.fbk_divider);
 209         }
 210         pr_debug("Scanning BIOS table ...\n");
 211         for(i=0; i<32; i++) {
 212                 tmp0 = BIOS_IN16(tmp+64+i*2);
 213                 if (tmp0 == 0)
 214                         break;
 215                 pr_debug(" %d x %d\n", BIOS_IN16(tmp0), BIOS_IN16(tmp0+2));
 216                 if ((BIOS_IN16(tmp0) == rinfo->panel_info.xres) &&
 217                     (BIOS_IN16(tmp0+2) == rinfo->panel_info.yres)) {
 218                         rinfo->panel_info.hblank = (BIOS_IN16(tmp0+17) - BIOS_IN16(tmp0+19)) * 8;
 219                         rinfo->panel_info.hOver_plus = ((BIOS_IN16(tmp0+21) -
 220                                                          BIOS_IN16(tmp0+19) -1) * 8) & 0x7fff;
 221                         rinfo->panel_info.hSync_width = BIOS_IN8(tmp0+23) * 8;
 222                         rinfo->panel_info.vblank = BIOS_IN16(tmp0+24) - BIOS_IN16(tmp0+26);
 223                         rinfo->panel_info.vOver_plus = (BIOS_IN16(tmp0+28) & 0x7ff) - BIOS_IN16(tmp0+26);
 224                         rinfo->panel_info.vSync_width = (BIOS_IN16(tmp0+28) & 0xf800) >> 11;
 225                         rinfo->panel_info.clock = BIOS_IN16(tmp0+9);
 226                         /* Assume high active syncs for now until ATI tells me more... maybe we
 227                          * can probe register values here ?
 228                          */
 229                         rinfo->panel_info.hAct_high = 1;
 230                         rinfo->panel_info.vAct_high = 1;
 231                         /* Mark panel infos valid */
 232                         rinfo->panel_info.valid = 1;
 233
 234                         pr_debug("Found panel in BIOS table:\n");
 235                         pr_debug("  hblank: %d\n", rinfo->panel_info.hblank);
 236                         pr_debug("  hOver_plus: %d\n", rinfo->panel_info.hOver_plus);
 237                         pr_debug("  hSync_width: %d\n", rinfo->panel_info.hSync_width);
 238                         pr_debug("  vblank: %d\n", rinfo->panel_info.vblank);
 239                         pr_debug("  vOver_plus: %d\n", rinfo->panel_info.vOver_plus);
 240                         pr_debug("  vSync_width: %d\n", rinfo->panel_info.vSync_width);
 241                         pr_debug("  clock: %d\n", rinfo->panel_info.clock);
 242
 243                         return 1;
 244                 }
 245         }
 246         pr_debug("Didn't find panel in BIOS table !\n");
 247
 248         return 0;
 249 }
 250
 251 /* Try to extract the connector informations from the BIOS. This
 252  * doesn't quite work yet, but it's output is still useful for
 253  * debugging
 254  */
 255 static void radeon_parse_connector_info(struct radeonfb_info *rinfo)
 256 {
 257         int offset, chips, connectors, tmp, i, conn, type;
 258
 259         static char* __conn_type_table[16] = {
 260                 "NONE", "Proprietary", "CRT", "DVI-I", "DVI-D", "Unknown", "Unknown",
 261                 "Unknown", "Unknown", "Unknown", "Unknown", "Unknown", "Unknown",
 262                 "Unknown", "Unknown", "Unknown"
 263         };
 264
 265         if (!rinfo->bios_seg)
 266                 return;
 267
 268         offset = BIOS_IN16(rinfo->fp_bios_start + 0x50);
 269         if (offset == 0) {
 270                 printk(KERN_WARNING "radeonfb: No connector info table detected\n");
 271                 return;
 272         }
 273
 274         /* Don't do much more at this point but displaying the data if
 275          * DEBUG is enabled
 276          */
 277         chips = BIOS_IN8(offset++) >> 4;
 278         pr_debug("%d chips in connector info\n", chips);
 279         for (i = 0; i < chips; i++) {
 280                 tmp = BIOS_IN8(offset++);
 281                 connectors = tmp & 0x0f;
 282                 pr_debug(" - chip %d has %d connectors\n", tmp >> 4, connectors);
 283                 for (conn = 0; ; conn++) {
 284                         tmp = BIOS_IN16(offset);
 285                         if (tmp == 0)
 286                                 break;
 287                         offset += 2;
 288                         type = (tmp >> 12) & 0x0f;
 289                         pr_debug("  * connector %d of type %d (%s) : %04x\n",
 290                                conn, type, __conn_type_table[type], tmp);
 291                 }
 292         }
 293 }
 294
 295
 296 /*
 297  * Probe physical connection of a CRT. This code comes from XFree
 298  * as well and currently is only implemented for the CRT DAC, the
 299  * code for the TVDAC is commented out in XFree as "non working"
 300  */
 301 static int radeon_crt_is_connected(struct radeonfb_info *rinfo, int is_crt_dac)
 302 {
 303     int           connected = 0;
 304
 305     /* the monitor either wasn't connected or it is a non-DDC CRT.
 306      * try to probe it
 307      */
 308     if (is_crt_dac) {
 309         unsigned long ulOrigVCLK_ECP_CNTL;
 310         unsigned long ulOrigDAC_CNTL;
 311         unsigned long ulOrigDAC_EXT_CNTL;
 312         unsigned long ulOrigCRTC_EXT_CNTL;
 313         unsigned long ulData;
 314         unsigned long ulMask;
 315
 316         ulOrigVCLK_ECP_CNTL = INPLL(VCLK_ECP_CNTL);
 317
 318         ulData              = ulOrigVCLK_ECP_CNTL;
 319         ulData             &= ~(PIXCLK_ALWAYS_ONb
 320                                 | PIXCLK_DAC_ALWAYS_ONb);
 321         ulMask              = ~(PIXCLK_ALWAYS_ONb
 322                                 | PIXCLK_DAC_ALWAYS_ONb);
 323         OUTPLLP(VCLK_ECP_CNTL, ulData, ulMask);
 324
 325         ulOrigCRTC_EXT_CNTL = INREG(CRTC_EXT_CNTL);
 326         ulData              = ulOrigCRTC_EXT_CNTL;
 327         ulData             |= CRTC_CRT_ON;
 328         OUTREG(CRTC_EXT_CNTL, ulData);
 329
 330         ulOrigDAC_EXT_CNTL = INREG(DAC_EXT_CNTL);
 331         ulData             = ulOrigDAC_EXT_CNTL;
 332         ulData            &= ~DAC_FORCE_DATA_MASK;
 333         ulData            |=  (DAC_FORCE_BLANK_OFF_EN
 334                                |DAC_FORCE_DATA_EN
 335                                |DAC_FORCE_DATA_SEL_MASK);
 336         if ((rinfo->family == CHIP_FAMILY_RV250) ||
 337             (rinfo->family == CHIP_FAMILY_RV280))
 338             ulData |= (0x01b6 << DAC_FORCE_DATA_SHIFT);
 339         else
 340             ulData |= (0x01ac << DAC_FORCE_DATA_SHIFT);
 341
 342         OUTREG(DAC_EXT_CNTL, ulData);
 343
 344         ulOrigDAC_CNTL     = INREG(DAC_CNTL);
 345         ulData             = ulOrigDAC_CNTL;
 346         ulData            |= DAC_CMP_EN;
 347         ulData            &= ~(DAC_RANGE_CNTL_MASK
 348                                | DAC_PDWN);
 349         ulData            |= 0x2;
 350         OUTREG(DAC_CNTL, ulData);
 351
 352         mdelay(1);
 353
 354         ulData     = INREG(DAC_CNTL);
 355         connected =  (DAC_CMP_OUTPUT & ulData) ? 1 : 0;
 356
 357         ulData    = ulOrigVCLK_ECP_CNTL;
 358         ulMask    = 0xFFFFFFFFL;
 359         OUTPLLP(VCLK_ECP_CNTL, ulData, ulMask);
 360
 361         OUTREG(DAC_CNTL,      ulOrigDAC_CNTL     );
 362         OUTREG(DAC_EXT_CNTL,  ulOrigDAC_EXT_CNTL );
 363         OUTREG(CRTC_EXT_CNTL, ulOrigCRTC_EXT_CNTL);
 364     }
 365
 366     return connected ? MT_CRT : MT_NONE;
 367 }
 368
 369 /*
 370  * Parse the "monitor_layout" string if any. This code is mostly
 371  * copied from XFree's radeon driver
 372  */
 373 static int radeon_parse_monitor_layout(struct radeonfb_info *rinfo,
 374                                        const char *monitor_layout)
 375 {
 376         char s1[5], s2[5];
 377         int i = 0, second = 0;
 378         const char *s;
 379
 380         if (!monitor_layout)
 381                 return 0;
 382
 383         s = monitor_layout;
 384         do {
 385                 switch(*s) {
 386                 case ',':
 387                         s1[i] = '\0';
 388                         i = 0;
 389                         second = 1;
 390                         break;
 391                 case ' ':
 392                 case '\0':
 393                         break;
 394                 default:
 395                         if (i > 4)
 396                                 break;
 397                         if (second)
 398                                 s2[i] = *s;
 399                         else
 400                                 s1[i] = *s;
 401                         i++;
 402                 }
 403
 404                 if (i > 4)
 405                         i = 4;
 406
 407         } while (*s++);
 408         if (second)
 409                 s2[i] = 0;
 410         else {
 411                 s1[i] = 0;
 412                 s2[0] = 0;
 413         }
 414         if (strcmp(s1, "CRT") == 0)
 415                 rinfo->mon1_type = MT_CRT;
 416         else if (strcmp(s1, "TMDS") == 0)
 417                 rinfo->mon1_type = MT_DFP;
 418         else if (strcmp(s1, "LVDS") == 0)
 419                 rinfo->mon1_type = MT_LCD;
 420
 421         if (strcmp(s2, "CRT") == 0)
 422                 rinfo->mon2_type = MT_CRT;
 423         else if (strcmp(s2, "TMDS") == 0)
 424                 rinfo->mon2_type = MT_DFP;
 425         else if (strcmp(s2, "LVDS") == 0)
 426                 rinfo->mon2_type = MT_LCD;
 427
 428         return 1;
 429 }
 430
 431 /*
 432  * Probe display on both primary and secondary card's connector (if any)
 433  * by various available techniques (i2c, OF device tree, BIOS, ...) and
 434  * try to retrieve EDID. The algorithm here comes from XFree's radeon
 435  * driver
 436  */
 437 void radeon_probe_screens(struct radeonfb_info *rinfo,
 438                           const char *monitor_layout, int ignore_edid)
 439 {
 440 #ifdef CONFIG_FB_RADEON_I2C
 441         int ddc_crt2_used = 0;
 442 #endif
 443         int tmp, i;
 444
 445         radeon_parse_connector_info(rinfo);
 446
 447         if (radeon_parse_monitor_layout(rinfo, monitor_layout)) {
 448
 449                 /*
 450                  * If user specified a monitor_layout option, use it instead
 451                  * of auto-detecting. Maybe we should only use this argument
 452                  * on the first radeon card probed or provide a way to specify
 453                  * a layout for each card ?
 454                  */
 455
 456                 pr_debug("Using specified monitor layout: %s", monitor_layout);
 457 #ifdef CONFIG_FB_RADEON_I2C
 458                 if (!ignore_edid) {
 459                         if (rinfo->mon1_type != MT_NONE)
 460                                 if (!radeon_probe_i2c_connector(rinfo, ddc_dvi, &rinfo->mon1_EDID)) {
 461                                         radeon_probe_i2c_connector(rinfo, ddc_crt2, &rinfo->mon1_EDID);
 462                                         ddc_crt2_used = 1;
 463                                 }
 464                         if (rinfo->mon2_type != MT_NONE)
 465                                 if (!radeon_probe_i2c_connector(rinfo, ddc_vga, &rinfo->mon2_EDID) &&
 466                                     !ddc_crt2_used)
 467                                         radeon_probe_i2c_connector(rinfo, ddc_crt2, &rinfo->mon2_EDID);
 468                 }
 469 #endif /* CONFIG_FB_RADEON_I2C */
 470                 if (rinfo->mon1_type == MT_NONE) {
 471                         if (rinfo->mon2_type != MT_NONE) {
 472                                 rinfo->mon1_type = rinfo->mon2_type;
 473                                 rinfo->mon1_EDID = rinfo->mon2_EDID;
 474                         } else {
 475                                 rinfo->mon1_type = MT_CRT;
 476                                 printk(KERN_INFO "radeonfb: No valid monitor, assuming CRT on first port\n");
 477                         }
 478                         rinfo->mon2_type = MT_NONE;
 479                         rinfo->mon2_EDID = NULL;
 480                 }
 481         } else {
 482                 /*
 483                  * Auto-detecting display type (well... trying to ...)
 484                  */
 485
 486                 pr_debug("Starting monitor auto detection...\n");
 487
 488 #if defined(DEBUG) && defined(CONFIG_FB_RADEON_I2C)
 489                 {
 490                         u8 *EDIDs[4] = { NULL, NULL, NULL, NULL };
 491                         int mon_types[4] = {MT_NONE, MT_NONE, MT_NONE, MT_NONE};
 492                         int i;
 493
 494                         for (i = 0; i < 4; i++)
 495                                 mon_types[i] = radeon_probe_i2c_connector(rinfo,
 496                                                                           i+1, &EDIDs[i]);
 497                 }
 498 #endif /* DEBUG */
 499                 /*
 500                  * Old single head cards
 501                  */
 502                 if (!rinfo->has_CRTC2) {
 503 #if defined(CONFIG_PPC) || defined(CONFIG_SPARC)
 504                         if (rinfo->mon1_type == MT_NONE)
 505                                 rinfo->mon1_type = radeon_probe_OF_head(rinfo, 0,
 506                                                                         &rinfo->mon1_EDID);
 507 #endif /* CONFIG_PPC || CONFIG_SPARC */
 508 #ifdef CONFIG_FB_RADEON_I2C
 509                         if (rinfo->mon1_type == MT_NONE)
 510                                 rinfo->mon1_type =
 511                                         radeon_probe_i2c_connector(rinfo, ddc_dvi,
 512                                                                    &rinfo->mon1_EDID);
 513                         if (rinfo->mon1_type == MT_NONE)
 514                                 rinfo->mon1_type =
 515                                         radeon_probe_i2c_connector(rinfo, ddc_vga,
 516                                                                    &rinfo->mon1_EDID);
 517                         if (rinfo->mon1_type == MT_NONE)
 518                                 rinfo->mon1_type =
 519                                         radeon_probe_i2c_connector(rinfo, ddc_crt2,
 520                                                                    &rinfo->mon1_EDID);
 521 #endif /* CONFIG_FB_RADEON_I2C */
 522                         if (rinfo->mon1_type == MT_NONE)
 523                                 rinfo->mon1_type = MT_CRT;
 524                         goto bail;
 525                 }
 526
 527                 /*
 528                  * Check for cards with reversed DACs or TMDS controllers using BIOS
 529                  */
 530                 if (rinfo->bios_seg &&
 531                     (tmp = BIOS_IN16(rinfo->fp_bios_start + 0x50))) {
 532                         for (i = 1; i < 4; i++) {
 533                                 unsigned int tmp0;
 534
 535                                 if (!BIOS_IN8(tmp + i*2) && i > 1)
 536                                         break;
 537                                 tmp0 = BIOS_IN16(tmp + i*2);
 538                                 if ((!(tmp0 & 0x01)) && (((tmp0 >> 8) & 0x0f) == ddc_dvi)) {
 539                                         rinfo->reversed_DAC = 1;
 540                                         printk(KERN_INFO "radeonfb: Reversed DACs detected\n");
 541                                 }
 542                                 if ((((tmp0 >> 8) & 0x0f) == ddc_dvi) && ((tmp0 >> 4) & 0x01)) {
 543                                         rinfo->reversed_TMDS = 1;
 544                                         printk(KERN_INFO "radeonfb: Reversed TMDS detected\n");
 545                                 }
 546                         }
 547                 }
 548
 549                 /*
 550                  * Probe primary head (DVI or laptop internal panel)
 551                  */
 552 #if defined(CONFIG_PPC) || defined(CONFIG_SPARC)
 553                 if (rinfo->mon1_type == MT_NONE)
 554                         rinfo->mon1_type = radeon_probe_OF_head(rinfo, 0,
 555                                                                 &rinfo->mon1_EDID);
 556 #endif /* CONFIG_PPC || CONFIG_SPARC */
 557 #ifdef CONFIG_FB_RADEON_I2C
 558                 if (rinfo->mon1_type == MT_NONE)
 559                         rinfo->mon1_type = radeon_probe_i2c_connector(rinfo, ddc_dvi,
 560                                                                       &rinfo->mon1_EDID);
 561                 if (rinfo->mon1_type == MT_NONE) {
 562                         rinfo->mon1_type = radeon_probe_i2c_connector(rinfo, ddc_crt2,
 563                                                                       &rinfo->mon1_EDID);
 564                         if (rinfo->mon1_type != MT_NONE)
 565                                 ddc_crt2_used = 1;
 566                 }
 567 #endif /* CONFIG_FB_RADEON_I2C */
 568                 if (rinfo->mon1_type == MT_NONE && rinfo->is_mobility &&
 569                     ((rinfo->bios_seg && (INREG(BIOS_4_SCRATCH) & 4))
 570                      || (INREG(LVDS_GEN_CNTL) & LVDS_ON))) {
 571                         rinfo->mon1_type = MT_LCD;
 572                         printk("Non-DDC laptop panel detected\n");
 573                 }
 574                 if (rinfo->mon1_type == MT_NONE)
 575                         rinfo->mon1_type = radeon_crt_is_connected(rinfo, rinfo->reversed_DAC);
 576
 577                 /*
 578                  * Probe secondary head (mostly VGA, can be DVI)
 579                  */
 580 #if defined(CONFIG_PPC) || defined(CONFIG_SPARC)
 581                 if (rinfo->mon2_type == MT_NONE)
 582                         rinfo->mon2_type = radeon_probe_OF_head(rinfo, 1,
 583                                                                 &rinfo->mon2_EDID);
 584 #endif /* CONFIG_PPC || defined(CONFIG_SPARC) */
 585 #ifdef CONFIG_FB_RADEON_I2C
 586                 if (rinfo->mon2_type == MT_NONE)
 587                         rinfo->mon2_type = radeon_probe_i2c_connector(rinfo, ddc_vga,
 588                                                                       &rinfo->mon2_EDID);
 589                 if (rinfo->mon2_type == MT_NONE && !ddc_crt2_used)
 590                         rinfo->mon2_type = radeon_probe_i2c_connector(rinfo, ddc_crt2,
 591                                                                       &rinfo->mon2_EDID);
 592 #endif /* CONFIG_FB_RADEON_I2C */
 593                 if (rinfo->mon2_type == MT_NONE)
 594                         rinfo->mon2_type = radeon_crt_is_connected(rinfo, !rinfo->reversed_DAC);
 595
 596                 /*
 597                  * If we only detected port 2, we swap them, if none detected,
 598                  * assume CRT (maybe fallback to old BIOS_SCRATCH stuff ? or look
 599                  * at FP registers ?)
 600                  */
 601                 if (rinfo->mon1_type == MT_NONE) {
 602                         if (rinfo->mon2_type != MT_NONE) {
 603                                 rinfo->mon1_type = rinfo->mon2_type;
 604                                 rinfo->mon1_EDID = rinfo->mon2_EDID;
 605                         } else
 606                                 rinfo->mon1_type = MT_CRT;
 607                         rinfo->mon2_type = MT_NONE;
 608                         rinfo->mon2_EDID = NULL;
 609                 }
 610
 611                 /*
 612                  * Deal with reversed TMDS
 613                  */
 614                 if (rinfo->reversed_TMDS) {
 615                         /* Always keep internal TMDS as primary head */
 616                         if (rinfo->mon1_type == MT_DFP || rinfo->mon2_type == MT_DFP) {
 617                                 int tmp_type = rinfo->mon1_type;
 618                                 u8 *tmp_EDID = rinfo->mon1_EDID;
 619                                 rinfo->mon1_type = rinfo->mon2_type;
 620                                 rinfo->mon1_EDID = rinfo->mon2_EDID;
 621                                 rinfo->mon2_type = tmp_type;
 622                                 rinfo->mon2_EDID = tmp_EDID;
 623                                 if (rinfo->mon1_type == MT_CRT || rinfo->mon2_type == MT_CRT)
 624                                         rinfo->reversed_DAC ^= 1;
 625                         }
 626                 }
 627         }
 628         if (ignore_edid) {
 629                 kfree(rinfo->mon1_EDID);
 630                 rinfo->mon1_EDID = NULL;
 631                 kfree(rinfo->mon2_EDID);
 632                 rinfo->mon2_EDID = NULL;
 633         }
 634
 635  bail:
 636         printk(KERN_INFO "radeonfb: Monitor 1 type %s found\n",
 637                radeon_get_mon_name(rinfo->mon1_type));
 638         if (rinfo->mon1_EDID)
 639                 printk(KERN_INFO "radeonfb: EDID probed\n");
 640         if (!rinfo->has_CRTC2)
 641                 return;
 642         printk(KERN_INFO "radeonfb: Monitor 2 type %s found\n",
 643                radeon_get_mon_name(rinfo->mon2_type));
 644         if (rinfo->mon2_EDID)
 645                 printk(KERN_INFO "radeonfb: EDID probed\n");
 646 }
 647
 648
 649 /*
 650  * This function applies any arch/model/machine specific fixups
 651  * to the panel info. It may eventually alter EDID block as
 652  * well or whatever is specific to a given model and not probed
 653  * properly by the default code
 654  */
 655 static void radeon_fixup_panel_info(struct radeonfb_info *rinfo)
 656 {
 657 #ifdef CONFIG_PPC
 658         /*
 659          * LCD Flat panels should use fixed dividers, we enfore that on
 660          * PPC only for now...
 661          */
 662         if (!rinfo->panel_info.use_bios_dividers && rinfo->mon1_type == MT_LCD
 663             && rinfo->is_mobility) {
 664                 int ppll_div_sel;
 665                 u32 ppll_divn;
 666                 ppll_div_sel = INREG8(CLOCK_CNTL_INDEX + 1) & 0x3;
 667                 radeon_pll_errata_after_index(rinfo);
 668                 ppll_divn = INPLL(PPLL_DIV_0 + ppll_div_sel);
 669                 rinfo->panel_info.ref_divider = rinfo->pll.ref_div;
 670                 rinfo->panel_info.fbk_divider = ppll_divn & 0x7ff;
 671                 rinfo->panel_info.post_divider = (ppll_divn >> 16) & 0x7;
 672                 rinfo->panel_info.use_bios_dividers = 1;
 673
 674                 printk(KERN_DEBUG "radeonfb: Using Firmware dividers 0x%08x "
 675                        "from PPLL %d\n",
 676                        rinfo->panel_info.fbk_divider |
 677                        (rinfo->panel_info.post_divider << 16),
 678                        ppll_div_sel);
 679         }
 680 #endif /* CONFIG_PPC */
 681 }
 682
 683
 684 /*
 685  * Fill up panel infos from a mode definition, either returned by the EDID
 686  * or from the default mode when we can't do any better
 687  */
 688 static void radeon_var_to_panel_info(struct radeonfb_info *rinfo, struct fb_var_screeninfo *var)
 689 {
 690         rinfo->panel_info.xres = var->xres;
 691         rinfo->panel_info.yres = var->yres;
 692         rinfo->panel_info.clock = 100000000 / var->pixclock;
 693         rinfo->panel_info.hOver_plus = var->right_margin;
 694         rinfo->panel_info.hSync_width = var->hsync_len;
 695         rinfo->panel_info.hblank = var->left_margin +
 696                 (var->right_margin + var->hsync_len);
 697         rinfo->panel_info.vOver_plus = var->lower_margin;
 698         rinfo->panel_info.vSync_width = var->vsync_len;
 699         rinfo->panel_info.vblank = var->upper_margin +
 700                 (var->lower_margin + var->vsync_len);
 701         rinfo->panel_info.hAct_high =
 702                 (var->sync & FB_SYNC_HOR_HIGH_ACT) != 0;
 703         rinfo->panel_info.vAct_high =
 704                 (var->sync & FB_SYNC_VERT_HIGH_ACT) != 0;
 705         rinfo->panel_info.valid = 1;
 706         /* We use a default of 200ms for the panel power delay,
 707          * I need to have a real schedule() instead of mdelay's in the panel code.
 708          * we might be possible to figure out a better power delay either from
 709          * MacOS OF tree or from the EDID block (proprietary extensions ?)
 710          */
 711         rinfo->panel_info.pwr_delay = 200;
 712 }
 713
 714 static void radeon_videomode_to_var(struct fb_var_screeninfo *var,
 715                                     const struct fb_videomode *mode)
 716 {
 717         var->xres = mode->xres;
 718         var->yres = mode->yres;
 719         var->xres_virtual = mode->xres;
 720         var->yres_virtual = mode->yres;
 721         var->xoffset = 0;
 722         var->yoffset = 0;
 723         var->pixclock = mode->pixclock;
 724         var->left_margin = mode->left_margin;
 725         var->right_margin = mode->right_margin;
 726         var->upper_margin = mode->upper_margin;
 727         var->lower_margin = mode->lower_margin;
 728         var->hsync_len = mode->hsync_len;
 729         var->vsync_len = mode->vsync_len;
 730         var->sync = mode->sync;
 731         var->vmode = mode->vmode;
 732 }
 733
 734 #ifdef CONFIG_PPC_PSERIES
 735 static int is_powerblade(const char *model)
 736 {
 737         struct device_node *root;
 738         const char* cp;
 739         int len, l, rc = 0;
 740
 741         root = of_find_node_by_path("/");
 742         if (root && model) {
 743                 l = strlen(model);
 744                 cp = of_get_property(root, "model", &len);
 745                 if (cp)
 746                         rc = memcmp(model, cp, min(len, l)) == 0;
 747                 of_node_put(root);
 748         }
 749         return rc;
 750 }
 751 #endif
 752
 753 /*
 754  * Build the modedb for head 1 (head 2 will come later), check panel infos
 755  * from either BIOS or EDID, and pick up the default mode
 756  */
 757 void radeon_check_modes(struct radeonfb_info *rinfo, const char *mode_option)
 758 {
 759         struct fb_info * info = rinfo->info;
 760         int has_default_mode = 0;
 761
 762         /*
 763          * Fill default var first
 764          */
 765         info->var = radeonfb_default_var;
 766         INIT_LIST_HEAD(&info->modelist);
 767
 768         /*
 769          * First check out what BIOS has to say
 770          */
 771         if (rinfo->mon1_type == MT_LCD)
 772                 radeon_get_panel_info_BIOS(rinfo);
 773
 774         /*
 775          * Parse EDID detailed timings and deduce panel infos if any. Right now
 776          * we only deal with first entry returned by parse_EDID, we may do better
 777          * some day...
 778          */
 779         if (!rinfo->panel_info.use_bios_dividers && rinfo->mon1_type != MT_CRT
 780             && rinfo->mon1_EDID) {
 781                 struct fb_var_screeninfo var;
 782                 pr_debug("Parsing EDID data for panel info\n");
 783                 if (fb_parse_edid(rinfo->mon1_EDID, &var) == 0) {
 784                         if (var.xres >= rinfo->panel_info.xres &&
 785                             var.yres >= rinfo->panel_info.yres)
 786                                 radeon_var_to_panel_info(rinfo, &var);
 787                 }
 788         }
 789
 790         /*
 791          * Do any additional platform/arch fixups to the panel infos
 792          */
 793         radeon_fixup_panel_info(rinfo);
 794
 795         /*
 796          * If we have some valid panel infos, we setup the default mode based on
 797          * those
 798          */
 799         if (rinfo->mon1_type != MT_CRT && rinfo->panel_info.valid) {
 800                 struct fb_var_screeninfo *var = &info->var;
 801
 802                 pr_debug("Setting up default mode based on panel info\n");
 803                 var->xres = rinfo->panel_info.xres;
 804                 var->yres = rinfo->panel_info.yres;
 805                 var->xres_virtual = rinfo->panel_info.xres;
 806                 var->yres_virtual = rinfo->panel_info.yres;
 807                 var->xoffset = var->yoffset = 0;
 808                 var->bits_per_pixel = 8;
 809                 var->pixclock = 100000000 / rinfo->panel_info.clock;
 810                 var->left_margin = (rinfo->panel_info.hblank - rinfo->panel_info.hOver_plus
 811                                     - rinfo->panel_info.hSync_width);
 812                 var->right_margin = rinfo->panel_info.hOver_plus;
 813                 var->upper_margin = (rinfo->panel_info.vblank - rinfo->panel_info.vOver_plus
 814                                      - rinfo->panel_info.vSync_width);
 815                 var->lower_margin = rinfo->panel_info.vOver_plus;
 816                 var->hsync_len = rinfo->panel_info.hSync_width;
 817                 var->vsync_len = rinfo->panel_info.vSync_width;
 818                 var->sync = 0;
 819                 if (rinfo->panel_info.hAct_high)
 820                         var->sync |= FB_SYNC_HOR_HIGH_ACT;
 821                 if (rinfo->panel_info.vAct_high)
 822                         var->sync |= FB_SYNC_VERT_HIGH_ACT;
 823                 var->vmode = 0;
 824                 has_default_mode = 1;
 825         }
 826
 827         /*
 828          * Now build modedb from EDID
 829          */
 830         if (rinfo->mon1_EDID) {
 831                 fb_edid_to_monspecs(rinfo->mon1_EDID, &info->monspecs);
 832                 fb_videomode_to_modelist(info->monspecs.modedb,
 833                                          info->monspecs.modedb_len,
 834                                          &info->modelist);
 835                 rinfo->mon1_modedb = info->monspecs.modedb;
 836                 rinfo->mon1_dbsize = info->monspecs.modedb_len;
 837         }
 838
 839
 840         /*
 841          * Finally, if we don't have panel infos we need to figure some (or
 842          * we try to read it from card), we try to pick a default mode
 843          * and create some panel infos. Whatever...
 844          */
 845         if (rinfo->mon1_type != MT_CRT && !rinfo->panel_info.valid) {
 846                 struct fb_videomode     *modedb;
 847                 int                     dbsize;
 848                 char                    modename[32];
 849
 850                 pr_debug("Guessing panel info...\n");
 851                 if (rinfo->panel_info.xres == 0 || rinfo->panel_info.yres == 0) {
 852                         u32 tmp = INREG(FP_HORZ_STRETCH) & HORZ_PANEL_SIZE;
 853                         rinfo->panel_info.xres = ((tmp >> HORZ_PANEL_SHIFT) + 1) * 8;
 854                         tmp = INREG(FP_VERT_STRETCH) & VERT_PANEL_SIZE;
 855                         rinfo->panel_info.yres = (tmp >> VERT_PANEL_SHIFT) + 1;
 856                 }
 857                 if (rinfo->panel_info.xres == 0 || rinfo->panel_info.yres == 0) {
 858                         printk(KERN_WARNING "radeonfb: Can't find panel size, going back to CRT\n");
 859                         rinfo->mon1_type = MT_CRT;
 860                         goto pickup_default;
 861                 }
 862                 printk(KERN_WARNING "radeonfb: Assuming panel size %dx%d\n",
 863                        rinfo->panel_info.xres, rinfo->panel_info.yres);
 864                 modedb = rinfo->mon1_modedb;
 865                 dbsize = rinfo->mon1_dbsize;
 866                 snprintf(modename, 31, "%dx%d", rinfo->panel_info.xres, rinfo->panel_info.yres);
 867                 if (fb_find_mode(&info->var, info, modename,
 868                                  modedb, dbsize, NULL, 8) == 0) {
 869                         printk(KERN_WARNING "radeonfb: Can't find mode for panel size, going back to CRT\n");
 870                         rinfo->mon1_type = MT_CRT;
 871                         goto pickup_default;
 872                 }
 873                 has_default_mode = 1;
 874                 radeon_var_to_panel_info(rinfo, &info->var);
 875         }
 876
 877  pickup_default:
 878         /*
 879          * Apply passed-in mode option if any
 880          */
 881         if (mode_option) {
 882                 if (fb_find_mode(&info->var, info, mode_option,
 883                                  info->monspecs.modedb,
 884                                  info->monspecs.modedb_len, NULL, 8) != 0)
 885                         has_default_mode = 1;
 886         }
 887
 888 #ifdef CONFIG_PPC_PSERIES
 889         if (!has_default_mode && (
 890                 is_powerblade("IBM,8842") || /* JS20 */
 891                 is_powerblade("IBM,8844") || /* JS21 */
 892                 is_powerblade("IBM,7998") || /* JS12/JS21/JS22 */
 893                 is_powerblade("IBM,0792") || /* QS21 */
 894                 is_powerblade("IBM,0793")    /* QS22 */
 895             )) {
 896                 printk("Falling back to 800x600 on JSxx hardware\n");
 897                 if (fb_find_mode(&info->var, info, "800x600@60",
 898                                  info->monspecs.modedb,
 899                                  info->monspecs.modedb_len, NULL, 8) != 0)
 900                         has_default_mode = 1;
 901         }
 902 #endif
 903
 904         /*
 905          * Still no mode, let's pick up a default from the db
 906          */
 907         if (!has_default_mode && info->monspecs.modedb != NULL) {
 908                 struct fb_monspecs *specs = &info->monspecs;
 909                 struct fb_videomode *modedb = NULL;
 910
 911                 /* get preferred timing */
 912                 if (specs->misc & FB_MISC_1ST_DETAIL) {
 913                         int i;
 914
 915                         for (i = 0; i < specs->modedb_len; i++) {
 916                                 if (specs->modedb[i].flag & FB_MODE_IS_FIRST) {
 917                                         modedb = &specs->modedb[i];
 918                                         break;
 919                                 }
 920                         }
 921                 } else {
 922                         /* otherwise, get first mode in database */
 923                         modedb = &specs->modedb[0];
 924                 }
 925                 if (modedb != NULL) {
 926                         info->var.bits_per_pixel = 8;
 927                         radeon_videomode_to_var(&info->var, modedb);
 928                         has_default_mode = 1;
 929                 }
 930         }
 931         if (1) {
 932                 struct fb_videomode mode;
 933                 /* Make sure that whatever mode got selected is actually in the
 934                  * modelist or the kernel may die
 935                  */
 936                 fb_var_to_videomode(&mode, &info->var);
 937                 fb_add_videomode(&mode, &info->modelist);
 938         }
 939 }
 940
 941 /*
 942  * The code below is used to pick up a mode in check_var and
 943  * set_var. It should be made generic
 944  */
 945
 946 /*
 947  * This is used when looking for modes. We assign a "distance" value
 948  * to a mode in the modedb depending how "close" it is from what we
 949  * are looking for.
 950  * Currently, we don't compare that much, we could do better but
 951  * the current fbcon doesn't quite mind ;)
 952  */
 953 static int radeon_compare_modes(const struct fb_var_screeninfo *var,
 954                                 const struct fb_videomode *mode)
 955 {
 956         int distance = 0;
 957
 958         distance = mode->yres - var->yres;
 959         distance += (mode->xres - var->xres)/2;
 960         return distance;
 961 }
 962
 963 /*
 964  * This function is called by check_var, it gets the passed in mode parameter, and
 965  * outputs a valid mode matching the passed-in one as closely as possible.
 966  * We need something better ultimately. Things like fbcon basically pass us out
 967  * current mode with xres/yres hacked, while things like XFree will actually
 968  * produce a full timing that we should respect as much as possible.
 969  *
 970  * This is why I added the FB_ACTIVATE_FIND that is used by fbcon. Without this,
 971  * we do a simple spec match, that's all. With it, we actually look for a mode in
 972  * either our monitor modedb or the vesa one if none
 973  *
 974  */
 975 int  radeon_match_mode(struct radeonfb_info *rinfo,
 976                        struct fb_var_screeninfo *dest,
 977                        const struct fb_var_screeninfo *src)
 978 {
 979         const struct fb_videomode       *db = vesa_modes;
 980         int                             i, dbsize = 34;
 981         int                             has_rmx, native_db = 0;
 982         int                             distance = INT_MAX;
 983         const struct fb_videomode       *candidate = NULL;
 984
 985         /* Start with a copy of the requested mode */
 986         memcpy(dest, src, sizeof(struct fb_var_screeninfo));
 987
 988         /* Check if we have a modedb built from EDID */
 989         if (rinfo->mon1_modedb) {
 990                 db = rinfo->mon1_modedb;
 991                 dbsize = rinfo->mon1_dbsize;
 992                 native_db = 1;
 993         }
 994
 995         /* Check if we have a scaler allowing any fancy mode */
 996         has_rmx = rinfo->mon1_type == MT_LCD || rinfo->mon1_type == MT_DFP;
 997
 998         /* If we have a scaler and are passed FB_ACTIVATE_TEST or
 999          * FB_ACTIVATE_NOW, just do basic checking and return if the
1000          * mode match
1001          */
1002         if ((src->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_TEST ||
1003             (src->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
1004                 /* We don't have an RMX, validate timings. If we don't have
1005                  * monspecs, we should be paranoid and not let use go above
1006                  * 640x480-60, but I assume userland knows what it's doing here
1007                  * (though I may be proven wrong...)
1008                  */
1009                 if (has_rmx == 0 && rinfo->mon1_modedb)
1010                         if (fb_validate_mode((struct fb_var_screeninfo *)src, rinfo->info))
1011                                 return -EINVAL;
1012                 return 0;
1013         }
1014
1015         /* Now look for a mode in the database */
1016         while (db) {
1017                 for (i = 0; i < dbsize; i++) {
1018                         int d;
1019
1020                         if (db[i].yres < src->yres)
1021                                 continue;
1022                         if (db[i].xres < src->xres)
1023                                 continue;
1024                         d = radeon_compare_modes(src, &db[i]);
1025                         /* If the new mode is at least as good as the previous one,
1026                          * then it's our new candidate
1027                          */
1028                         if (d < distance) {
1029                                 candidate = &db[i];
1030                                 distance = d;
1031                         }
1032                 }
1033                 db = NULL;
1034                 /* If we have a scaler, we allow any mode from the database */
1035                 if (native_db && has_rmx) {
1036                         db = vesa_modes;
1037                         dbsize = 34;
1038                         native_db = 0;
1039                 }
1040         }
1041
1042         /* If we have found a match, return it */
1043         if (candidate != NULL) {
1044                 radeon_videomode_to_var(dest, candidate);
1045                 return 0;
1046         }
1047
1048         /* If we haven't and don't have a scaler, fail */
1049         if (!has_rmx)
1050                 return -EINVAL;
1051
1052         return 0;
1053 }