drivers/gpu/drm/ast/ast_mode.c

   1 /*
   2  * Copyright 2012 Red Hat Inc.
   3  * Parts based on xf86-video-ast
   4  * Copyright (c) 2005 ASPEED Technology Inc.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  18  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  19  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  20  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * The above copyright notice and this permission notice (including the
  23  * next paragraph) shall be included in all copies or substantial portions
  24  * of the Software.
  25  *
  26  */
  27 /*
  28  * Authors: Dave Airlie <airlied@redhat.com>
  29  */
  30
  31 #include <linux/export.h>
  32 #include <linux/pci.h>
  33
  34 #include <drm/drm_atomic.h>
  35 #include <drm/drm_atomic_helper.h>
  36 #include <drm/drm_atomic_state_helper.h>
  37 #include <drm/drm_crtc.h>
  38 #include <drm/drm_crtc_helper.h>
  39 #include <drm/drm_fourcc.h>
  40 #include <drm/drm_gem_framebuffer_helper.h>
  41 #include <drm/drm_gem_vram_helper.h>
  42 #include <drm/drm_plane_helper.h>
  43 #include <drm/drm_probe_helper.h>
  44 #include <drm/drm_simple_kms_helper.h>
  45
  46 #include "ast_drv.h"
  47 #include "ast_tables.h"
  48
  49 static struct ast_i2c_chan *ast_i2c_create(struct drm_device *dev);
  50 static void ast_i2c_destroy(struct ast_i2c_chan *i2c);
  51
  52 static inline void ast_load_palette_index(struct ast_private *ast,
  53                                      u8 index, u8 red, u8 green,
  54                                      u8 blue)
  55 {
  56         ast_io_write8(ast, AST_IO_DAC_INDEX_WRITE, index);
  57         ast_io_read8(ast, AST_IO_SEQ_PORT);
  58         ast_io_write8(ast, AST_IO_DAC_DATA, red);
  59         ast_io_read8(ast, AST_IO_SEQ_PORT);
  60         ast_io_write8(ast, AST_IO_DAC_DATA, green);
  61         ast_io_read8(ast, AST_IO_SEQ_PORT);
  62         ast_io_write8(ast, AST_IO_DAC_DATA, blue);
  63         ast_io_read8(ast, AST_IO_SEQ_PORT);
  64 }
  65
  66 static void ast_crtc_load_lut(struct ast_private *ast, struct drm_crtc *crtc)
  67 {
  68         u16 *r, *g, *b;
  69         int i;
  70
  71         if (!crtc->enabled)
  72                 return;
  73
  74         r = crtc->gamma_store;
  75         g = r + crtc->gamma_size;
  76         b = g + crtc->gamma_size;
  77
  78         for (i = 0; i < 256; i++)
  79                 ast_load_palette_index(ast, i, *r++ >> 8, *g++ >> 8, *b++ >> 8);
  80 }
  81
  82 static bool ast_get_vbios_mode_info(const struct drm_format_info *format,
  83                                     const struct drm_display_mode *mode,
  84                                     struct drm_display_mode *adjusted_mode,
  85                                     struct ast_vbios_mode_info *vbios_mode)
  86 {
  87         u32 refresh_rate_index = 0, refresh_rate;
  88         const struct ast_vbios_enhtable *best = NULL;
  89         u32 hborder, vborder;
  90         bool check_sync;
  91
  92         switch (format->cpp[0] * 8) {
  93         case 8:
  94                 vbios_mode->std_table = &vbios_stdtable[VGAModeIndex];
  95                 break;
  96         case 16:
  97                 vbios_mode->std_table = &vbios_stdtable[HiCModeIndex];
  98                 break;
  99         case 24:
 100         case 32:
 101                 vbios_mode->std_table = &vbios_stdtable[TrueCModeIndex];
 102                 break;
 103         default:
 104                 return false;
 105         }
 106
 107         switch (mode->crtc_hdisplay) {
 108         case 640:
 109                 vbios_mode->enh_table = &res_640x480[refresh_rate_index];
 110                 break;
 111         case 800:
 112                 vbios_mode->enh_table = &res_800x600[refresh_rate_index];
 113                 break;
 114         case 1024:
 115                 vbios_mode->enh_table = &res_1024x768[refresh_rate_index];
 116                 break;
 117         case 1280:
 118                 if (mode->crtc_vdisplay == 800)
 119                         vbios_mode->enh_table = &res_1280x800[refresh_rate_index];
 120                 else
 121                         vbios_mode->enh_table = &res_1280x1024[refresh_rate_index];
 122                 break;
 123         case 1360:
 124                 vbios_mode->enh_table = &res_1360x768[refresh_rate_index];
 125                 break;
 126         case 1440:
 127                 vbios_mode->enh_table = &res_1440x900[refresh_rate_index];
 128                 break;
 129         case 1600:
 130                 if (mode->crtc_vdisplay == 900)
 131                         vbios_mode->enh_table = &res_1600x900[refresh_rate_index];
 132                 else
 133                         vbios_mode->enh_table = &res_1600x1200[refresh_rate_index];
 134                 break;
 135         case 1680:
 136                 vbios_mode->enh_table = &res_1680x1050[refresh_rate_index];
 137                 break;
 138         case 1920:
 139                 if (mode->crtc_vdisplay == 1080)
 140                         vbios_mode->enh_table = &res_1920x1080[refresh_rate_index];
 141                 else
 142                         vbios_mode->enh_table = &res_1920x1200[refresh_rate_index];
 143                 break;
 144         default:
 145                 return false;
 146         }
 147
 148         refresh_rate = drm_mode_vrefresh(mode);
 149         check_sync = vbios_mode->enh_table->flags & WideScreenMode;
 150
 151         while (1) {
 152                 const struct ast_vbios_enhtable *loop = vbios_mode->enh_table;
 153
 154                 while (loop->refresh_rate != 0xff) {
 155                         if ((check_sync) &&
 156                             (((mode->flags & DRM_MODE_FLAG_NVSYNC)  &&
 157                               (loop->flags & PVSync))  ||
 158                              ((mode->flags & DRM_MODE_FLAG_PVSYNC)  &&
 159                               (loop->flags & NVSync))  ||
 160                              ((mode->flags & DRM_MODE_FLAG_NHSYNC)  &&
 161                               (loop->flags & PHSync))  ||
 162                              ((mode->flags & DRM_MODE_FLAG_PHSYNC)  &&
 163                               (loop->flags & NHSync)))) {
 164                                 loop++;
 165                                 continue;
 166                         }
 167                         if (loop->refresh_rate <= refresh_rate
 168                             && (!best || loop->refresh_rate > best->refresh_rate))
 169                                 best = loop;
 170                         loop++;
 171                 }
 172                 if (best || !check_sync)
 173                         break;
 174                 check_sync = 0;
 175         }
 176
 177         if (best)
 178                 vbios_mode->enh_table = best;
 179
 180         hborder = (vbios_mode->enh_table->flags & HBorder) ? 8 : 0;
 181         vborder = (vbios_mode->enh_table->flags & VBorder) ? 8 : 0;
 182
 183         adjusted_mode->crtc_htotal = vbios_mode->enh_table->ht;
 184         adjusted_mode->crtc_hblank_start = vbios_mode->enh_table->hde + hborder;
 185         adjusted_mode->crtc_hblank_end = vbios_mode->enh_table->ht - hborder;
 186         adjusted_mode->crtc_hsync_start = vbios_mode->enh_table->hde + hborder +
 187                 vbios_mode->enh_table->hfp;
 188         adjusted_mode->crtc_hsync_end = (vbios_mode->enh_table->hde + hborder +
 189                                          vbios_mode->enh_table->hfp +
 190                                          vbios_mode->enh_table->hsync);
 191
 192         adjusted_mode->crtc_vtotal = vbios_mode->enh_table->vt;
 193         adjusted_mode->crtc_vblank_start = vbios_mode->enh_table->vde + vborder;
 194         adjusted_mode->crtc_vblank_end = vbios_mode->enh_table->vt - vborder;
 195         adjusted_mode->crtc_vsync_start = vbios_mode->enh_table->vde + vborder +
 196                 vbios_mode->enh_table->vfp;
 197         adjusted_mode->crtc_vsync_end = (vbios_mode->enh_table->vde + vborder +
 198                                          vbios_mode->enh_table->vfp +
 199                                          vbios_mode->enh_table->vsync);
 200
 201         return true;
 202 }
 203
 204 static void ast_set_vbios_color_reg(struct ast_private *ast,
 205                                     const struct drm_format_info *format,
 206                                     const struct ast_vbios_mode_info *vbios_mode)
 207 {
 208         u32 color_index;
 209
 210         switch (format->cpp[0]) {
 211         case 1:
 212                 color_index = VGAModeIndex - 1;
 213                 break;
 214         case 2:
 215                 color_index = HiCModeIndex;
 216                 break;
 217         case 3:
 218         case 4:
 219                 color_index = TrueCModeIndex;
 220                 break;
 221         default:
 222                 return;
 223         }
 224
 225         ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0x8c, (u8)((color_index & 0x0f) << 4));
 226
 227         ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0x91, 0x00);
 228
 229         if (vbios_mode->enh_table->flags & NewModeInfo) {
 230                 ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0x91, 0xa8);
 231                 ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0x92, format->cpp[0] * 8);
 232         }
 233 }
 234
 235 static void ast_set_vbios_mode_reg(struct ast_private *ast,
 236                                    const struct drm_display_mode *adjusted_mode,
 237                                    const struct ast_vbios_mode_info *vbios_mode)
 238 {
 239         u32 refresh_rate_index, mode_id;
 240
 241         refresh_rate_index = vbios_mode->enh_table->refresh_rate_index;
 242         mode_id = vbios_mode->enh_table->mode_id;
 243
 244         ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0x8d, refresh_rate_index & 0xff);
 245         ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0x8e, mode_id & 0xff);
 246
 247         ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0x91, 0x00);
 248
 249         if (vbios_mode->enh_table->flags & NewModeInfo) {
 250                 ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0x91, 0xa8);
 251                 ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0x93, adjusted_mode->clock / 1000);
 252                 ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0x94, adjusted_mode->crtc_hdisplay);
 253                 ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0x95, adjusted_mode->crtc_hdisplay >> 8);
 254                 ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0x96, adjusted_mode->crtc_vdisplay);
 255                 ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0x97, adjusted_mode->crtc_vdisplay >> 8);
 256         }
 257 }
 258
 259 static void ast_set_std_reg(struct ast_private *ast,
 260                             struct drm_display_mode *mode,
 261                             struct ast_vbios_mode_info *vbios_mode)
 262 {
 263         const struct ast_vbios_stdtable *stdtable;
 264         u32 i;
 265         u8 jreg;
 266
 267         stdtable = vbios_mode->std_table;
 268
 269         jreg = stdtable->misc;
 270         ast_io_write8(ast, AST_IO_MISC_PORT_WRITE, jreg);
 271
 272         /* Set SEQ; except Screen Disable field */
 273         ast_set_index_reg(ast, AST_IO_SEQ_PORT, 0x00, 0x03);
 274         ast_set_index_reg_mask(ast, AST_IO_SEQ_PORT, 0x01, 0xdf, stdtable->seq[0]);
 275         for (i = 1; i < 4; i++) {
 276                 jreg = stdtable->seq[i];
 277                 ast_set_index_reg(ast, AST_IO_SEQ_PORT, (i + 1) , jreg);
 278         }
 279
 280         /* Set CRTC; except base address and offset */
 281         ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x11, 0x7f, 0x00);
 282         for (i = 0; i < 12; i++)
 283                 ast_set_index_reg(ast, AST_IO_CRTC_PORT, i, stdtable->crtc[i]);
 284         for (i = 14; i < 19; i++)
 285                 ast_set_index_reg(ast, AST_IO_CRTC_PORT, i, stdtable->crtc[i]);
 286         for (i = 20; i < 25; i++)
 287                 ast_set_index_reg(ast, AST_IO_CRTC_PORT, i, stdtable->crtc[i]);
 288
 289         /* set AR */
 290         jreg = ast_io_read8(ast, AST_IO_INPUT_STATUS1_READ);
 291         for (i = 0; i < 20; i++) {
 292                 jreg = stdtable->ar[i];
 293                 ast_io_write8(ast, AST_IO_AR_PORT_WRITE, (u8)i);
 294                 ast_io_write8(ast, AST_IO_AR_PORT_WRITE, jreg);
 295         }
 296         ast_io_write8(ast, AST_IO_AR_PORT_WRITE, 0x14);
 297         ast_io_write8(ast, AST_IO_AR_PORT_WRITE, 0x00);
 298
 299         jreg = ast_io_read8(ast, AST_IO_INPUT_STATUS1_READ);
 300         ast_io_write8(ast, AST_IO_AR_PORT_WRITE, 0x20);
 301
 302         /* Set GR */
 303         for (i = 0; i < 9; i++)
 304                 ast_set_index_reg(ast, AST_IO_GR_PORT, i, stdtable->gr[i]);
 305 }
 306
 307 static void ast_set_crtc_reg(struct ast_private *ast,
 308                              struct drm_display_mode *mode,
 309                              struct ast_vbios_mode_info *vbios_mode)
 310 {
 311         u8 jreg05 = 0, jreg07 = 0, jreg09 = 0, jregAC = 0, jregAD = 0, jregAE = 0;
 312         u16 temp, precache = 0;
 313
 314         if ((ast->chip == AST2500) &&
 315             (vbios_mode->enh_table->flags & AST2500PreCatchCRT))
 316                 precache = 40;
 317
 318         ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x11, 0x7f, 0x00);
 319
 320         temp = (mode->crtc_htotal >> 3) - 5;
 321         if (temp & 0x100)
 322                 jregAC |= 0x01; /* HT D[8] */
 323         ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x00, 0x00, temp);
 324
 325         temp = (mode->crtc_hdisplay >> 3) - 1;
 326         if (temp & 0x100)
 327                 jregAC |= 0x04; /* HDE D[8] */
 328         ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x01, 0x00, temp);
 329
 330         temp = (mode->crtc_hblank_start >> 3) - 1;
 331         if (temp & 0x100)
 332                 jregAC |= 0x10; /* HBS D[8] */
 333         ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x02, 0x00, temp);
 334
 335         temp = ((mode->crtc_hblank_end >> 3) - 1) & 0x7f;
 336         if (temp & 0x20)
 337                 jreg05 |= 0x80;  /* HBE D[5] */
 338         if (temp & 0x40)
 339                 jregAD |= 0x01;  /* HBE D[5] */
 340         ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x03, 0xE0, (temp & 0x1f));
 341
 342         temp = ((mode->crtc_hsync_start-precache) >> 3) - 1;
 343         if (temp & 0x100)
 344                 jregAC |= 0x40; /* HRS D[5] */
 345         ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x04, 0x00, temp);
 346
 347         temp = (((mode->crtc_hsync_end-precache) >> 3) - 1) & 0x3f;
 348         if (temp & 0x20)
 349                 jregAD |= 0x04; /* HRE D[5] */
 350         ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x05, 0x60, (u8)((temp & 0x1f) | jreg05));
 351
 352         ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xAC, 0x00, jregAC);
 353         ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xAD, 0x00, jregAD);
 354
 355         /* vert timings */
 356         temp = (mode->crtc_vtotal) - 2;
 357         if (temp & 0x100)
 358                 jreg07 |= 0x01;
 359         if (temp & 0x200)
 360                 jreg07 |= 0x20;
 361         if (temp & 0x400)
 362                 jregAE |= 0x01;
 363         ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x06, 0x00, temp);
 364
 365         temp = (mode->crtc_vsync_start) - 1;
 366         if (temp & 0x100)
 367                 jreg07 |= 0x04;
 368         if (temp & 0x200)
 369                 jreg07 |= 0x80;
 370         if (temp & 0x400)
 371                 jregAE |= 0x08;
 372         ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x10, 0x00, temp);
 373
 374         temp = (mode->crtc_vsync_end - 1) & 0x3f;
 375         if (temp & 0x10)
 376                 jregAE |= 0x20;
 377         if (temp & 0x20)
 378                 jregAE |= 0x40;
 379         ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x11, 0x70, temp & 0xf);
 380
 381         temp = mode->crtc_vdisplay - 1;
 382         if (temp & 0x100)
 383                 jreg07 |= 0x02;
 384         if (temp & 0x200)
 385                 jreg07 |= 0x40;
 386         if (temp & 0x400)
 387                 jregAE |= 0x02;
 388         ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x12, 0x00, temp);
 389
 390         temp = mode->crtc_vblank_start - 1;
 391         if (temp & 0x100)
 392                 jreg07 |= 0x08;
 393         if (temp & 0x200)
 394                 jreg09 |= 0x20;
 395         if (temp & 0x400)
 396                 jregAE |= 0x04;
 397         ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x15, 0x00, temp);
 398
 399         temp = mode->crtc_vblank_end - 1;
 400         if (temp & 0x100)
 401                 jregAE |= 0x10;
 402         ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x16, 0x00, temp);
 403
 404         ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x07, 0x00, jreg07);
 405         ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x09, 0xdf, jreg09);
 406         ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xAE, 0x00, (jregAE | 0x80));
 407
 408         if (precache)
 409                 ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb6, 0x3f, 0x80);
 410         else
 411                 ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb6, 0x3f, 0x00);
 412
 413         ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x11, 0x7f, 0x80);
 414 }
 415
 416 static void ast_set_offset_reg(struct ast_private *ast,
 417                                struct drm_framebuffer *fb)
 418 {
 419         u16 offset;
 420
 421         offset = fb->pitches[0] >> 3;
 422         ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0x13, (offset & 0xff));
 423         ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xb0, (offset >> 8) & 0x3f);
 424 }
 425
 426 static void ast_set_dclk_reg(struct ast_private *ast,
 427                              struct drm_display_mode *mode,
 428                              struct ast_vbios_mode_info *vbios_mode)
 429 {
 430         const struct ast_vbios_dclk_info *clk_info;
 431
 432         if (ast->chip == AST2500)
 433                 clk_info = &dclk_table_ast2500[vbios_mode->enh_table->dclk_index];
 434         else
 435                 clk_info = &dclk_table[vbios_mode->enh_table->dclk_index];
 436
 437         ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xc0, 0x00, clk_info->param1);
 438         ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xc1, 0x00, clk_info->param2);
 439         ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xbb, 0x0f,
 440                                (clk_info->param3 & 0xc0) |
 441                                ((clk_info->param3 & 0x3) << 4));
 442 }
 443
 444 static void ast_set_color_reg(struct ast_private *ast,
 445                               const struct drm_format_info *format)
 446 {
 447         u8 jregA0 = 0, jregA3 = 0, jregA8 = 0;
 448
 449         switch (format->cpp[0] * 8) {
 450         case 8:
 451                 jregA0 = 0x70;
 452                 jregA3 = 0x01;
 453                 jregA8 = 0x00;
 454                 break;
 455         case 15:
 456         case 16:
 457                 jregA0 = 0x70;
 458                 jregA3 = 0x04;
 459                 jregA8 = 0x02;
 460                 break;
 461         case 32:
 462                 jregA0 = 0x70;
 463                 jregA3 = 0x08;
 464                 jregA8 = 0x02;
 465                 break;
 466         }
 467
 468         ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xa0, 0x8f, jregA0);
 469         ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xa3, 0xf0, jregA3);
 470         ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xa8, 0xfd, jregA8);
 471 }
 472
 473 static void ast_set_crtthd_reg(struct ast_private *ast)
 474 {
 475         /* Set Threshold */
 476         if (ast->chip == AST2300 || ast->chip == AST2400 ||
 477             ast->chip == AST2500) {
 478                 ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xa7, 0x78);
 479                 ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xa6, 0x60);
 480         } else if (ast->chip == AST2100 ||
 481                    ast->chip == AST1100 ||
 482                    ast->chip == AST2200 ||
 483                    ast->chip == AST2150) {
 484                 ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xa7, 0x3f);
 485                 ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xa6, 0x2f);
 486         } else {
 487                 ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xa7, 0x2f);
 488                 ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xa6, 0x1f);
 489         }
 490 }
 491
 492 static void ast_set_sync_reg(struct ast_private *ast,
 493                              struct drm_display_mode *mode,
 494                              struct ast_vbios_mode_info *vbios_mode)
 495 {
 496         u8 jreg;
 497
 498         jreg  = ast_io_read8(ast, AST_IO_MISC_PORT_READ);
 499         jreg &= ~0xC0;
 500         if (vbios_mode->enh_table->flags & NVSync) jreg |= 0x80;
 501         if (vbios_mode->enh_table->flags & NHSync) jreg |= 0x40;
 502         ast_io_write8(ast, AST_IO_MISC_PORT_WRITE, jreg);
 503 }
 504
 505 static void ast_set_start_address_crt1(struct ast_private *ast,
 506                                        unsigned offset)
 507 {
 508         u32 addr;
 509
 510         addr = offset >> 2;
 511         ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0x0d, (u8)(addr & 0xff));
 512         ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0x0c, (u8)((addr >> 8) & 0xff));
 513         ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xaf, (u8)((addr >> 16) & 0xff));
 514
 515 }
 516
 517 static void ast_wait_for_vretrace(struct ast_private *ast)
 518 {
 519         unsigned long timeout = jiffies + HZ;
 520         u8 vgair1;
 521
 522         do {
 523                 vgair1 = ast_io_read8(ast, AST_IO_INPUT_STATUS1_READ);
 524         } while (!(vgair1 & AST_IO_VGAIR1_VREFRESH) && time_before(jiffies, timeout));
 525 }
 526
 527 /*
 528  * Primary plane
 529  */
 530
 531 static const uint32_t ast_primary_plane_formats[] = {
 532         DRM_FORMAT_XRGB8888,
 533         DRM_FORMAT_RGB565,
 534         DRM_FORMAT_C8,
 535 };
 536
 537 static int ast_primary_plane_helper_atomic_check(struct drm_plane *plane,
 538                                                  struct drm_plane_state *state)
 539 {
 540         struct drm_crtc_state *crtc_state;
 541         struct ast_crtc_state *ast_crtc_state;
 542         int ret;
 543
 544         if (!state->crtc)
 545                 return 0;
 546
 547         crtc_state = drm_atomic_get_new_crtc_state(state->state, state->crtc);
 548
 549         ret = drm_atomic_helper_check_plane_state(state, crtc_state,
 550                                                   DRM_PLANE_HELPER_NO_SCALING,
 551                                                   DRM_PLANE_HELPER_NO_SCALING,
 552                                                   false, true);
 553         if (ret)
 554                 return ret;
 555
 556         if (!state->visible)
 557                 return 0;
 558
 559         ast_crtc_state = to_ast_crtc_state(crtc_state);
 560
 561         ast_crtc_state->format = state->fb->format;
 562
 563         return 0;
 564 }
 565
 566 static void
 567 ast_primary_plane_helper_atomic_update(struct drm_plane *plane,
 568                                        struct drm_plane_state *old_state)
 569 {
 570         struct drm_device *dev = plane->dev;
 571         struct ast_private *ast = to_ast_private(dev);
 572         struct drm_plane_state *state = plane->state;
 573         struct drm_gem_vram_object *gbo;
 574         s64 gpu_addr;
 575         struct drm_framebuffer *fb = state->fb;
 576         struct drm_framebuffer *old_fb = old_state->fb;
 577
 578         if (!old_fb || (fb->format != old_fb->format)) {
 579                 struct drm_crtc_state *crtc_state = state->crtc->state;
 580                 struct ast_crtc_state *ast_crtc_state = to_ast_crtc_state(crtc_state);
 581                 struct ast_vbios_mode_info *vbios_mode_info = &ast_crtc_state->vbios_mode_info;
 582
 583                 ast_set_color_reg(ast, fb->format);
 584                 ast_set_vbios_color_reg(ast, fb->format, vbios_mode_info);
 585         }
 586
 587         gbo = drm_gem_vram_of_gem(fb->obj[0]);
 588         gpu_addr = drm_gem_vram_offset(gbo);
 589         if (drm_WARN_ON_ONCE(dev, gpu_addr < 0))
 590                 return; /* Bug: we didn't pin the BO to VRAM in prepare_fb. */
 591
 592         ast_set_offset_reg(ast, fb);
 593         ast_set_start_address_crt1(ast, (u32)gpu_addr);
 594
 595         ast_set_index_reg_mask(ast, AST_IO_SEQ_PORT, 0x1, 0xdf, 0x00);
 596 }
 597
 598 static void
 599 ast_primary_plane_helper_atomic_disable(struct drm_plane *plane,
 600                                         struct drm_plane_state *old_state)
 601 {
 602         struct ast_private *ast = to_ast_private(plane->dev);
 603
 604         ast_set_index_reg_mask(ast, AST_IO_SEQ_PORT, 0x1, 0xdf, 0x20);
 605 }
 606
 607 static const struct drm_plane_helper_funcs ast_primary_plane_helper_funcs = {
 608         .prepare_fb = drm_gem_vram_plane_helper_prepare_fb,
 609         .cleanup_fb = drm_gem_vram_plane_helper_cleanup_fb,
 610         .atomic_check = ast_primary_plane_helper_atomic_check,
 611         .atomic_update = ast_primary_plane_helper_atomic_update,
 612         .atomic_disable = ast_primary_plane_helper_atomic_disable,
 613 };
 614
 615 static const struct drm_plane_funcs ast_primary_plane_funcs = {
 616         .update_plane = drm_atomic_helper_update_plane,
 617         .disable_plane = drm_atomic_helper_disable_plane,
 618         .destroy = drm_plane_cleanup,
 619         .reset = drm_atomic_helper_plane_reset,
 620         .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 621         .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
 622 };
 623
 624 /*
 625  * Cursor plane
 626  */
 627
 628 static const uint32_t ast_cursor_plane_formats[] = {
 629         DRM_FORMAT_ARGB8888,
 630 };
 631
 632 static int
 633 ast_cursor_plane_helper_prepare_fb(struct drm_plane *plane,
 634                                    struct drm_plane_state *new_state)
 635 {
 636         struct drm_framebuffer *fb = new_state->fb;
 637         struct drm_crtc *crtc = new_state->crtc;
 638         struct ast_private *ast;
 639         int ret;
 640
 641         if (!crtc || !fb)
 642                 return 0;
 643
 644         ast = to_ast_private(plane->dev);
 645
 646         ret = ast_cursor_blit(ast, fb);
 647         if (ret)
 648                 return ret;
 649
 650         return 0;
 651 }
 652
 653 static int ast_cursor_plane_helper_atomic_check(struct drm_plane *plane,
 654                                                 struct drm_plane_state *state)
 655 {
 656         struct drm_framebuffer *fb = state->fb;
 657         struct drm_crtc_state *crtc_state;
 658         int ret;
 659
 660         if (!state->crtc)
 661                 return 0;
 662
 663         crtc_state = drm_atomic_get_new_crtc_state(state->state, state->crtc);
 664
 665         ret = drm_atomic_helper_check_plane_state(state, crtc_state,
 666                                                   DRM_PLANE_HELPER_NO_SCALING,
 667                                                   DRM_PLANE_HELPER_NO_SCALING,
 668                                                   true, true);
 669         if (ret)
 670                 return ret;
 671
 672         if (!state->visible)
 673                 return 0;
 674
 675         if (fb->width > AST_MAX_HWC_WIDTH || fb->height > AST_MAX_HWC_HEIGHT)
 676                 return -EINVAL;
 677
 678         return 0;
 679 }
 680
 681 static void
 682 ast_cursor_plane_helper_atomic_update(struct drm_plane *plane,
 683                                       struct drm_plane_state *old_state)
 684 {
 685         struct drm_plane_state *state = plane->state;
 686         struct drm_framebuffer *fb = state->fb;
 687         struct ast_private *ast = to_ast_private(plane->dev);
 688         unsigned int offset_x, offset_y;
 689
 690         offset_x = AST_MAX_HWC_WIDTH - fb->width;
 691         offset_y = AST_MAX_HWC_WIDTH - fb->height;
 692
 693         if (state->fb != old_state->fb) {
 694                 /* A new cursor image was installed. */
 695                 ast_cursor_page_flip(ast);
 696         }
 697
 698         ast_cursor_show(ast, state->crtc_x, state->crtc_y,
 699                         offset_x, offset_y);
 700 }
 701
 702 static void
 703 ast_cursor_plane_helper_atomic_disable(struct drm_plane *plane,
 704                                        struct drm_plane_state *old_state)
 705 {
 706         struct ast_private *ast = to_ast_private(plane->dev);
 707
 708         ast_cursor_hide(ast);
 709 }
 710
 711 static const struct drm_plane_helper_funcs ast_cursor_plane_helper_funcs = {
 712         .prepare_fb = ast_cursor_plane_helper_prepare_fb,
 713         .cleanup_fb = NULL, /* not required for cursor plane */
 714         .atomic_check = ast_cursor_plane_helper_atomic_check,
 715         .atomic_update = ast_cursor_plane_helper_atomic_update,
 716         .atomic_disable = ast_cursor_plane_helper_atomic_disable,
 717 };
 718
 719 static const struct drm_plane_funcs ast_cursor_plane_funcs = {
 720         .update_plane = drm_atomic_helper_update_plane,
 721         .disable_plane = drm_atomic_helper_disable_plane,
 722         .destroy = drm_plane_cleanup,
 723         .reset = drm_atomic_helper_plane_reset,
 724         .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 725         .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
 726 };
 727
 728 /*
 729  * CRTC
 730  */
 731
 732 static void ast_crtc_dpms(struct drm_crtc *crtc, int mode)
 733 {
 734         struct ast_private *ast = to_ast_private(crtc->dev);
 735
 736         /* TODO: Maybe control display signal generation with
 737          *       Sync Enable (bit CR17.7).
 738          */
 739         switch (mode) {
 740         case DRM_MODE_DPMS_ON:
 741         case DRM_MODE_DPMS_STANDBY:
 742         case DRM_MODE_DPMS_SUSPEND:
 743                 if (ast->tx_chip_type == AST_TX_DP501)
 744                         ast_set_dp501_video_output(crtc->dev, 1);
 745                 ast_crtc_load_lut(ast, crtc);
 746                 break;
 747         case DRM_MODE_DPMS_OFF:
 748                 if (ast->tx_chip_type == AST_TX_DP501)
 749                         ast_set_dp501_video_output(crtc->dev, 0);
 750                 break;
 751         }
 752 }
 753
 754 static int ast_crtc_helper_atomic_check(struct drm_crtc *crtc,
 755                                         struct drm_crtc_state *state)
 756 {
 757         struct drm_device *dev = crtc->dev;
 758         struct ast_crtc_state *ast_state;
 759         const struct drm_format_info *format;
 760         bool succ;
 761
 762         if (!state->enable)
 763                 return 0; /* no mode checks if CRTC is being disabled */
 764
 765         ast_state = to_ast_crtc_state(state);
 766
 767         format = ast_state->format;
 768         if (drm_WARN_ON_ONCE(dev, !format))
 769                 return -EINVAL; /* BUG: We didn't set format in primary check(). */
 770
 771         succ = ast_get_vbios_mode_info(format, &state->mode,
 772                                        &state->adjusted_mode,
 773                                        &ast_state->vbios_mode_info);
 774         if (!succ)
 775                 return -EINVAL;
 776
 777         return 0;
 778 }
 779
 780 static void
 781 ast_crtc_helper_atomic_enable(struct drm_crtc *crtc,
 782                               struct drm_crtc_state *old_crtc_state)
 783 {
 784         struct drm_device *dev = crtc->dev;
 785         struct ast_private *ast = to_ast_private(dev);
 786         struct drm_crtc_state *crtc_state = crtc->state;
 787         struct ast_crtc_state *ast_crtc_state = to_ast_crtc_state(crtc_state);
 788         struct ast_vbios_mode_info *vbios_mode_info =
 789                 &ast_crtc_state->vbios_mode_info;
 790         struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode;
 791
 792         ast_set_vbios_mode_reg(ast, adjusted_mode, vbios_mode_info);
 793         ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xa1, 0x06);
 794         ast_set_std_reg(ast, adjusted_mode, vbios_mode_info);
 795         ast_set_crtc_reg(ast, adjusted_mode, vbios_mode_info);
 796         ast_set_dclk_reg(ast, adjusted_mode, vbios_mode_info);
 797         ast_set_crtthd_reg(ast);
 798         ast_set_sync_reg(ast, adjusted_mode, vbios_mode_info);
 799
 800         ast_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
 801 }
 802
 803 static void
 804 ast_crtc_helper_atomic_disable(struct drm_crtc *crtc,
 805                                struct drm_crtc_state *old_crtc_state)
 806 {
 807         struct drm_device *dev = crtc->dev;
 808         struct ast_private *ast = to_ast_private(dev);
 809
 810         ast_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
 811
 812         /*
 813          * HW cursors require the underlying primary plane and CRTC to
 814          * display a valid mode and image. This is not the case during
 815          * full modeset operations. So we temporarily disable any active
 816          * plane, including the HW cursor. Each plane's atomic_update()
 817          * helper will re-enable it if necessary.
 818          *
 819          * We only do this during *full* modesets. It does not affect
 820          * simple pageflips on the planes.
 821          */
 822         drm_atomic_helper_disable_planes_on_crtc(old_crtc_state, false);
 823
 824         /*
 825          * Ensure that no scanout takes place before reprogramming mode
 826          * and format registers.
 827          */
 828         ast_wait_for_vretrace(ast);
 829 }
 830
 831 static const struct drm_crtc_helper_funcs ast_crtc_helper_funcs = {
 832         .atomic_check = ast_crtc_helper_atomic_check,
 833         .atomic_enable = ast_crtc_helper_atomic_enable,
 834         .atomic_disable = ast_crtc_helper_atomic_disable,
 835 };
 836
 837 static void ast_crtc_reset(struct drm_crtc *crtc)
 838 {
 839         struct ast_crtc_state *ast_state =
 840                 kzalloc(sizeof(*ast_state), GFP_KERNEL);
 841
 842         if (crtc->state)
 843                 crtc->funcs->atomic_destroy_state(crtc, crtc->state);
 844
 845         __drm_atomic_helper_crtc_reset(crtc, &ast_state->base);
 846 }
 847
 848 static struct drm_crtc_state *
 849 ast_crtc_atomic_duplicate_state(struct drm_crtc *crtc)
 850 {
 851         struct ast_crtc_state *new_ast_state, *ast_state;
 852         struct drm_device *dev = crtc->dev;
 853
 854         if (drm_WARN_ON(dev, !crtc->state))
 855                 return NULL;
 856
 857         new_ast_state = kmalloc(sizeof(*new_ast_state), GFP_KERNEL);
 858         if (!new_ast_state)
 859                 return NULL;
 860         __drm_atomic_helper_crtc_duplicate_state(crtc, &new_ast_state->base);
 861
 862         ast_state = to_ast_crtc_state(crtc->state);
 863
 864         new_ast_state->format = ast_state->format;
 865         memcpy(&new_ast_state->vbios_mode_info, &ast_state->vbios_mode_info,
 866                sizeof(new_ast_state->vbios_mode_info));
 867
 868         return &new_ast_state->base;
 869 }
 870
 871 static void ast_crtc_atomic_destroy_state(struct drm_crtc *crtc,
 872                                           struct drm_crtc_state *state)
 873 {
 874         struct ast_crtc_state *ast_state = to_ast_crtc_state(state);
 875
 876         __drm_atomic_helper_crtc_destroy_state(&ast_state->base);
 877         kfree(ast_state);
 878 }
 879
 880 static const struct drm_crtc_funcs ast_crtc_funcs = {
 881         .reset = ast_crtc_reset,
 882         .gamma_set = drm_atomic_helper_legacy_gamma_set,
 883         .destroy = drm_crtc_cleanup,
 884         .set_config = drm_atomic_helper_set_config,
 885         .page_flip = drm_atomic_helper_page_flip,
 886         .atomic_duplicate_state = ast_crtc_atomic_duplicate_state,
 887         .atomic_destroy_state = ast_crtc_atomic_destroy_state,
 888 };
 889
 890 static int ast_crtc_init(struct drm_device *dev)
 891 {
 892         struct ast_private *ast = to_ast_private(dev);
 893         struct drm_crtc *crtc = &ast->crtc;
 894         int ret;
 895
 896         ret = drm_crtc_init_with_planes(dev, crtc, &ast->primary_plane,
 897                                         &ast->cursor_plane, &ast_crtc_funcs,
 898                                         NULL);
 899         if (ret)
 900                 return ret;
 901
 902         drm_mode_crtc_set_gamma_size(crtc, 256);
 903         drm_crtc_helper_add(crtc, &ast_crtc_helper_funcs);
 904
 905         return 0;
 906 }
 907
 908 /*
 909  * Encoder
 910  */
 911
 912 static int ast_encoder_init(struct drm_device *dev)
 913 {
 914         struct ast_private *ast = to_ast_private(dev);
 915         struct drm_encoder *encoder = &ast->encoder;
 916         int ret;
 917
 918         ret = drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_DAC);
 919         if (ret)
 920                 return ret;
 921
 922         encoder->possible_crtcs = 1;
 923
 924         return 0;
 925 }
 926
 927 /*
 928  * Connector
 929  */
 930
 931 static int ast_get_modes(struct drm_connector *connector)
 932 {
 933         struct ast_connector *ast_connector = to_ast_connector(connector);
 934         struct ast_private *ast = to_ast_private(connector->dev);
 935         struct edid *edid;
 936         int ret;
 937         bool flags = false;
 938         if (ast->tx_chip_type == AST_TX_DP501) {
 939                 ast->dp501_maxclk = 0xff;
 940                 edid = kmalloc(128, GFP_KERNEL);
 941                 if (!edid)
 942                         return -ENOMEM;
 943
 944                 flags = ast_dp501_read_edid(connector->dev, (u8 *)edid);
 945                 if (flags)
 946                         ast->dp501_maxclk = ast_get_dp501_max_clk(connector->dev);
 947                 else
 948                         kfree(edid);
 949         }
 950         if (!flags)
 951                 edid = drm_get_edid(connector, &ast_connector->i2c->adapter);
 952         if (edid) {
 953                 drm_connector_update_edid_property(&ast_connector->base, edid);
 954                 ret = drm_add_edid_modes(connector, edid);
 955                 kfree(edid);
 956                 return ret;
 957         } else
 958                 drm_connector_update_edid_property(&ast_connector->base, NULL);
 959         return 0;
 960 }
 961
 962 static enum drm_mode_status ast_mode_valid(struct drm_connector *connector,
 963                           struct drm_display_mode *mode)
 964 {
 965         struct ast_private *ast = to_ast_private(connector->dev);
 966         int flags = MODE_NOMODE;
 967         uint32_t jtemp;
 968
 969         if (ast->support_wide_screen) {
 970                 if ((mode->hdisplay == 1680) && (mode->vdisplay == 1050))
 971                         return MODE_OK;
 972                 if ((mode->hdisplay == 1280) && (mode->vdisplay == 800))
 973                         return MODE_OK;
 974                 if ((mode->hdisplay == 1440) && (mode->vdisplay == 900))
 975                         return MODE_OK;
 976                 if ((mode->hdisplay == 1360) && (mode->vdisplay == 768))
 977                         return MODE_OK;
 978                 if ((mode->hdisplay == 1600) && (mode->vdisplay == 900))
 979                         return MODE_OK;
 980
 981                 if ((ast->chip == AST2100) || (ast->chip == AST2200) ||
 982                     (ast->chip == AST2300) || (ast->chip == AST2400) ||
 983                     (ast->chip == AST2500)) {
 984                         if ((mode->hdisplay == 1920) && (mode->vdisplay == 1080))
 985                                 return MODE_OK;
 986
 987                         if ((mode->hdisplay == 1920) && (mode->vdisplay == 1200)) {
 988                                 jtemp = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd1, 0xff);
 989                                 if (jtemp & 0x01)
 990                                         return MODE_NOMODE;
 991                                 else
 992                                         return MODE_OK;
 993                         }
 994                 }
 995         }
 996         switch (mode->hdisplay) {
 997         case 640:
 998                 if (mode->vdisplay == 480) flags = MODE_OK;
 999                 break;
1000         case 800:
1001                 if (mode->vdisplay == 600) flags = MODE_OK;
1002                 break;
1003         case 1024:
1004                 if (mode->vdisplay == 768) flags = MODE_OK;
1005                 break;
1006         case 1280:
1007                 if (mode->vdisplay == 1024) flags = MODE_OK;
1008                 break;
1009         case 1600:
1010                 if (mode->vdisplay == 1200) flags = MODE_OK;
1011                 break;
1012         default:
1013                 return flags;
1014         }
1015
1016         return flags;
1017 }
1018
1019 static void ast_connector_destroy(struct drm_connector *connector)
1020 {
1021         struct ast_connector *ast_connector = to_ast_connector(connector);
1022         ast_i2c_destroy(ast_connector->i2c);
1023         drm_connector_cleanup(connector);
1024 }
1025
1026 static const struct drm_connector_helper_funcs ast_connector_helper_funcs = {
1027         .get_modes = ast_get_modes,
1028         .mode_valid = ast_mode_valid,
1029 };
1030
1031 static const struct drm_connector_funcs ast_connector_funcs = {
1032         .reset = drm_atomic_helper_connector_reset,
1033         .fill_modes = drm_helper_probe_single_connector_modes,
1034         .destroy = ast_connector_destroy,
1035         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
1036         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
1037 };
1038
1039 static int ast_connector_init(struct drm_device *dev)
1040 {
1041         struct ast_private *ast = to_ast_private(dev);
1042         struct ast_connector *ast_connector = &ast->connector;
1043         struct drm_connector *connector = &ast_connector->base;
1044         struct drm_encoder *encoder = &ast->encoder;
1045
1046         ast_connector->i2c = ast_i2c_create(dev);
1047         if (!ast_connector->i2c)
1048                 drm_err(dev, "failed to add ddc bus for connector\n");
1049
1050         drm_connector_init_with_ddc(dev, connector,
1051                                     &ast_connector_funcs,
1052                                     DRM_MODE_CONNECTOR_VGA,
1053                                     &ast_connector->i2c->adapter);
1054
1055         drm_connector_helper_add(connector, &ast_connector_helper_funcs);
1056
1057         connector->interlace_allowed = 0;
1058         connector->doublescan_allowed = 0;
1059
1060         connector->polled = DRM_CONNECTOR_POLL_CONNECT;
1061
1062         drm_connector_attach_encoder(connector, encoder);
1063
1064         return 0;
1065 }
1066
1067 /*
1068  * Mode config
1069  */
1070
1071 static const struct drm_mode_config_helper_funcs
1072 ast_mode_config_helper_funcs = {
1073         .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
1074 };
1075
1076 static const struct drm_mode_config_funcs ast_mode_config_funcs = {
1077         .fb_create = drm_gem_fb_create,
1078         .mode_valid = drm_vram_helper_mode_valid,
1079         .atomic_check = drm_atomic_helper_check,
1080         .atomic_commit = drm_atomic_helper_commit,
1081 };
1082
1083 int ast_mode_config_init(struct ast_private *ast)
1084 {
1085         struct drm_device *dev = &ast->base;
1086         int ret;
1087
1088         ret = ast_cursor_init(ast);
1089         if (ret)
1090                 return ret;
1091
1092         ret = drmm_mode_config_init(dev);
1093         if (ret)
1094                 return ret;
1095
1096         dev->mode_config.funcs = &ast_mode_config_funcs;
1097         dev->mode_config.min_width = 0;
1098         dev->mode_config.min_height = 0;
1099         dev->mode_config.preferred_depth = 24;
1100         dev->mode_config.prefer_shadow = 1;
1101         dev->mode_config.fb_base = pci_resource_start(dev->pdev, 0);
1102
1103         if (ast->chip == AST2100 ||
1104             ast->chip == AST2200 ||
1105             ast->chip == AST2300 ||
1106             ast->chip == AST2400 ||
1107             ast->chip == AST2500) {
1108                 dev->mode_config.max_width = 1920;
1109                 dev->mode_config.max_height = 2048;
1110         } else {
1111                 dev->mode_config.max_width = 1600;
1112                 dev->mode_config.max_height = 1200;
1113         }
1114
1115         dev->mode_config.helper_private = &ast_mode_config_helper_funcs;
1116
1117         memset(&ast->primary_plane, 0, sizeof(ast->primary_plane));
1118         ret = drm_universal_plane_init(dev, &ast->primary_plane, 0x01,
1119                                        &ast_primary_plane_funcs,
1120                                        ast_primary_plane_formats,
1121                                        ARRAY_SIZE(ast_primary_plane_formats),
1122                                        NULL, DRM_PLANE_TYPE_PRIMARY, NULL);
1123         if (ret) {
1124                 drm_err(dev, "ast: drm_universal_plane_init() failed: %d\n", ret);
1125                 return ret;
1126         }
1127         drm_plane_helper_add(&ast->primary_plane,
1128                              &ast_primary_plane_helper_funcs);
1129
1130         ret = drm_universal_plane_init(dev, &ast->cursor_plane, 0x01,
1131                                        &ast_cursor_plane_funcs,
1132                                        ast_cursor_plane_formats,
1133                                        ARRAY_SIZE(ast_cursor_plane_formats),
1134                                        NULL, DRM_PLANE_TYPE_CURSOR, NULL);
1135         if (ret) {
1136                 drm_err(dev, "drm_universal_plane_failed(): %d\n", ret);
1137                 return ret;
1138         }
1139         drm_plane_helper_add(&ast->cursor_plane,
1140                              &ast_cursor_plane_helper_funcs);
1141
1142         ast_crtc_init(dev);
1143         ast_encoder_init(dev);
1144         ast_connector_init(dev);
1145
1146         drm_mode_config_reset(dev);
1147
1148         return 0;
1149 }
1150
1151 static int get_clock(void *i2c_priv)
1152 {
1153         struct ast_i2c_chan *i2c = i2c_priv;
1154         struct ast_private *ast = to_ast_private(i2c->dev);
1155         uint32_t val, val2, count, pass;
1156
1157         count = 0;
1158         pass = 0;
1159         val = (ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb7, 0x10) >> 4) & 0x01;
1160         do {
1161                 val2 = (ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb7, 0x10) >> 4) & 0x01;
1162                 if (val == val2) {
1163                         pass++;
1164                 } else {
1165                         pass = 0;
1166                         val = (ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb7, 0x10) >> 4) & 0x01;
1167                 }
1168         } while ((pass < 5) && (count++ < 0x10000));
1169
1170         return val & 1 ? 1 : 0;
1171 }
1172
1173 static int get_data(void *i2c_priv)
1174 {
1175         struct ast_i2c_chan *i2c = i2c_priv;
1176         struct ast_private *ast = to_ast_private(i2c->dev);
1177         uint32_t val, val2, count, pass;
1178
1179         count = 0;
1180         pass = 0;
1181         val = (ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb7, 0x20) >> 5) & 0x01;
1182         do {
1183                 val2 = (ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb7, 0x20) >> 5) & 0x01;
1184                 if (val == val2) {
1185                         pass++;
1186                 } else {
1187                         pass = 0;
1188                         val = (ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb7, 0x20) >> 5) & 0x01;
1189                 }
1190         } while ((pass < 5) && (count++ < 0x10000));
1191
1192         return val & 1 ? 1 : 0;
1193 }
1194
1195 static void set_clock(void *i2c_priv, int clock)
1196 {
1197         struct ast_i2c_chan *i2c = i2c_priv;
1198         struct ast_private *ast = to_ast_private(i2c->dev);
1199         int i;
1200         u8 ujcrb7, jtemp;
1201
1202         for (i = 0; i < 0x10000; i++) {
1203                 ujcrb7 = ((clock & 0x01) ? 0 : 1);
1204                 ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb7, 0xf4, ujcrb7);
1205                 jtemp = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb7, 0x01);
1206                 if (ujcrb7 == jtemp)
1207                         break;
1208         }
1209 }
1210
1211 static void set_data(void *i2c_priv, int data)
1212 {
1213         struct ast_i2c_chan *i2c = i2c_priv;
1214         struct ast_private *ast = to_ast_private(i2c->dev);
1215         int i;
1216         u8 ujcrb7, jtemp;
1217
1218         for (i = 0; i < 0x10000; i++) {
1219                 ujcrb7 = ((data & 0x01) ? 0 : 1) << 2;
1220                 ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb7, 0xf1, ujcrb7);
1221                 jtemp = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb7, 0x04);
1222                 if (ujcrb7 == jtemp)
1223                         break;
1224         }
1225 }
1226
1227 static struct ast_i2c_chan *ast_i2c_create(struct drm_device *dev)
1228 {
1229         struct ast_i2c_chan *i2c;
1230         int ret;
1231
1232         i2c = kzalloc(sizeof(struct ast_i2c_chan), GFP_KERNEL);
1233         if (!i2c)
1234                 return NULL;
1235
1236         i2c->adapter.owner = THIS_MODULE;
1237         i2c->adapter.class = I2C_CLASS_DDC;
1238         i2c->adapter.dev.parent = &dev->pdev->dev;
1239         i2c->dev = dev;
1240         i2c_set_adapdata(&i2c->adapter, i2c);
1241         snprintf(i2c->adapter.name, sizeof(i2c->adapter.name),
1242                  "AST i2c bit bus");
1243         i2c->adapter.algo_data = &i2c->bit;
1244
1245         i2c->bit.udelay = 20;
1246         i2c->bit.timeout = 2;
1247         i2c->bit.data = i2c;
1248         i2c->bit.setsda = set_data;
1249         i2c->bit.setscl = set_clock;
1250         i2c->bit.getsda = get_data;
1251         i2c->bit.getscl = get_clock;
1252         ret = i2c_bit_add_bus(&i2c->adapter);
1253         if (ret) {
1254                 drm_err(dev, "Failed to register bit i2c\n");
1255                 goto out_free;
1256         }
1257
1258         return i2c;
1259 out_free:
1260         kfree(i2c);
1261         return NULL;
1262 }
1263
1264 static void ast_i2c_destroy(struct ast_i2c_chan *i2c)
1265 {
1266         if (!i2c)
1267                 return;
1268         i2c_del_adapter(&i2c->adapter);
1269         kfree(i2c);
1270 }