drivers/gpu/drm/shmobile/shmob_drm_crtc.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * shmob_drm_crtc.c  --  SH Mobile DRM CRTCs
   4  *
   5  * Copyright (C) 2012 Renesas Electronics Corporation
   6  *
   7  * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
   8  */
   9
  10 #include <linux/backlight.h>
  11 #include <linux/clk.h>
  12
  13 #include <drm/drm_crtc.h>
  14 #include <drm/drm_crtc_helper.h>
  15 #include <drm/drm_fb_cma_helper.h>
  16 #include <drm/drm_fourcc.h>
  17 #include <drm/drm_gem_cma_helper.h>
  18 #include <drm/drm_plane_helper.h>
  19 #include <drm/drm_probe_helper.h>
  20 #include <drm/drm_vblank.h>
  21
  22 #include "shmob_drm_backlight.h"
  23 #include "shmob_drm_crtc.h"
  24 #include "shmob_drm_drv.h"
  25 #include "shmob_drm_kms.h"
  26 #include "shmob_drm_plane.h"
  27 #include "shmob_drm_regs.h"
  28
  29 /*
  30  * TODO: panel support
  31  */
  32
  33 /* -----------------------------------------------------------------------------
  34  * Clock management
  35  */
  36
  37 static int shmob_drm_clk_on(struct shmob_drm_device *sdev)
  38 {
  39         int ret;
  40
  41         if (sdev->clock) {
  42                 ret = clk_prepare_enable(sdev->clock);
  43                 if (ret < 0)
  44                         return ret;
  45         }
  46
  47         return 0;
  48 }
  49
  50 static void shmob_drm_clk_off(struct shmob_drm_device *sdev)
  51 {
  52         if (sdev->clock)
  53                 clk_disable_unprepare(sdev->clock);
  54 }
  55
  56 /* -----------------------------------------------------------------------------
  57  * CRTC
  58  */
  59
  60 static void shmob_drm_crtc_setup_geometry(struct shmob_drm_crtc *scrtc)
  61 {
  62         struct drm_crtc *crtc = &scrtc->crtc;
  63         struct shmob_drm_device *sdev = crtc->dev->dev_private;
  64         const struct shmob_drm_interface_data *idata = &sdev->pdata->iface;
  65         const struct drm_display_mode *mode = &crtc->mode;
  66         u32 value;
  67
  68         value = sdev->ldmt1r
  69               | ((mode->flags & DRM_MODE_FLAG_PVSYNC) ? 0 : LDMT1R_VPOL)
  70               | ((mode->flags & DRM_MODE_FLAG_PHSYNC) ? 0 : LDMT1R_HPOL)
  71               | ((idata->flags & SHMOB_DRM_IFACE_FL_DWPOL) ? LDMT1R_DWPOL : 0)
  72               | ((idata->flags & SHMOB_DRM_IFACE_FL_DIPOL) ? LDMT1R_DIPOL : 0)
  73               | ((idata->flags & SHMOB_DRM_IFACE_FL_DAPOL) ? LDMT1R_DAPOL : 0)
  74               | ((idata->flags & SHMOB_DRM_IFACE_FL_HSCNT) ? LDMT1R_HSCNT : 0)
  75               | ((idata->flags & SHMOB_DRM_IFACE_FL_DWCNT) ? LDMT1R_DWCNT : 0);
  76         lcdc_write(sdev, LDMT1R, value);
  77
  78         if (idata->interface >= SHMOB_DRM_IFACE_SYS8A &&
  79             idata->interface <= SHMOB_DRM_IFACE_SYS24) {
  80                 /* Setup SYS bus. */
  81                 value = (idata->sys.cs_setup << LDMT2R_CSUP_SHIFT)
  82                       | (idata->sys.vsync_active_high ? LDMT2R_RSV : 0)
  83                       | (idata->sys.vsync_dir_input ? LDMT2R_VSEL : 0)
  84                       | (idata->sys.write_setup << LDMT2R_WCSC_SHIFT)
  85                       | (idata->sys.write_cycle << LDMT2R_WCEC_SHIFT)
  86                       | (idata->sys.write_strobe << LDMT2R_WCLW_SHIFT);
  87                 lcdc_write(sdev, LDMT2R, value);
  88
  89                 value = (idata->sys.read_latch << LDMT3R_RDLC_SHIFT)
  90                       | (idata->sys.read_setup << LDMT3R_RCSC_SHIFT)
  91                       | (idata->sys.read_cycle << LDMT3R_RCEC_SHIFT)
  92                       | (idata->sys.read_strobe << LDMT3R_RCLW_SHIFT);
  93                 lcdc_write(sdev, LDMT3R, value);
  94         }
  95
  96         value = ((mode->hdisplay / 8) << 16)                    /* HDCN */
  97               | (mode->htotal / 8);                             /* HTCN */
  98         lcdc_write(sdev, LDHCNR, value);
  99
 100         value = (((mode->hsync_end - mode->hsync_start) / 8) << 16) /* HSYNW */
 101               | (mode->hsync_start / 8);                        /* HSYNP */
 102         lcdc_write(sdev, LDHSYNR, value);
 103
 104         value = ((mode->hdisplay & 7) << 24) | ((mode->htotal & 7) << 16)
 105               | (((mode->hsync_end - mode->hsync_start) & 7) << 8)
 106               | (mode->hsync_start & 7);
 107         lcdc_write(sdev, LDHAJR, value);
 108
 109         value = ((mode->vdisplay) << 16)                        /* VDLN */
 110               | mode->vtotal;                                   /* VTLN */
 111         lcdc_write(sdev, LDVLNR, value);
 112
 113         value = ((mode->vsync_end - mode->vsync_start) << 16)   /* VSYNW */
 114               | mode->vsync_start;                              /* VSYNP */
 115         lcdc_write(sdev, LDVSYNR, value);
 116 }
 117
 118 static void shmob_drm_crtc_start_stop(struct shmob_drm_crtc *scrtc, bool start)
 119 {
 120         struct shmob_drm_device *sdev = scrtc->crtc.dev->dev_private;
 121         u32 value;
 122
 123         value = lcdc_read(sdev, LDCNT2R);
 124         if (start)
 125                 lcdc_write(sdev, LDCNT2R, value | LDCNT2R_DO);
 126         else
 127                 lcdc_write(sdev, LDCNT2R, value & ~LDCNT2R_DO);
 128
 129         /* Wait until power is applied/stopped. */
 130         while (1) {
 131                 value = lcdc_read(sdev, LDPMR) & LDPMR_LPS;
 132                 if ((start && value) || (!start && !value))
 133                         break;
 134
 135                 cpu_relax();
 136         }
 137
 138         if (!start) {
 139                 /* Stop the dot clock. */
 140                 lcdc_write(sdev, LDDCKSTPR, LDDCKSTPR_DCKSTP);
 141         }
 142 }
 143
 144 /*
 145  * shmob_drm_crtc_start - Configure and start the LCDC
 146  * @scrtc: the SH Mobile CRTC
 147  *
 148  * Configure and start the LCDC device. External devices (clocks, MERAM, panels,
 149  * ...) are not touched by this function.
 150  */
 151 static void shmob_drm_crtc_start(struct shmob_drm_crtc *scrtc)
 152 {
 153         struct drm_crtc *crtc = &scrtc->crtc;
 154         struct shmob_drm_device *sdev = crtc->dev->dev_private;
 155         const struct shmob_drm_interface_data *idata = &sdev->pdata->iface;
 156         const struct shmob_drm_format_info *format;
 157         struct drm_device *dev = sdev->ddev;
 158         struct drm_plane *plane;
 159         u32 value;
 160         int ret;
 161
 162         if (scrtc->started)
 163                 return;
 164
 165         format = shmob_drm_format_info(crtc->primary->fb->format->format);
 166         if (WARN_ON(format == NULL))
 167                 return;
 168
 169         /* Enable clocks before accessing the hardware. */
 170         ret = shmob_drm_clk_on(sdev);
 171         if (ret < 0)
 172                 return;
 173
 174         /* Reset and enable the LCDC. */
 175         lcdc_write(sdev, LDCNT2R, lcdc_read(sdev, LDCNT2R) | LDCNT2R_BR);
 176         lcdc_wait_bit(sdev, LDCNT2R, LDCNT2R_BR, 0);
 177         lcdc_write(sdev, LDCNT2R, LDCNT2R_ME);
 178
 179         /* Stop the LCDC first and disable all interrupts. */
 180         shmob_drm_crtc_start_stop(scrtc, false);
 181         lcdc_write(sdev, LDINTR, 0);
 182
 183         /* Configure power supply, dot clocks and start them. */
 184         lcdc_write(sdev, LDPMR, 0);
 185
 186         value = sdev->lddckr;
 187         if (idata->clk_div) {
 188                 /* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider
 189                  * denominator.
 190                  */
 191                 lcdc_write(sdev, LDDCKPAT1R, 0);
 192                 lcdc_write(sdev, LDDCKPAT2R, (1 << (idata->clk_div / 2)) - 1);
 193
 194                 if (idata->clk_div == 1)
 195                         value |= LDDCKR_MOSEL;
 196                 else
 197                         value |= idata->clk_div;
 198         }
 199
 200         lcdc_write(sdev, LDDCKR, value);
 201         lcdc_write(sdev, LDDCKSTPR, 0);
 202         lcdc_wait_bit(sdev, LDDCKSTPR, ~0, 0);
 203
 204         /* TODO: Setup SYS panel */
 205
 206         /* Setup geometry, format, frame buffer memory and operation mode. */
 207         shmob_drm_crtc_setup_geometry(scrtc);
 208
 209         /* TODO: Handle YUV colorspaces. Hardcode REC709 for now. */
 210         lcdc_write(sdev, LDDFR, format->lddfr | LDDFR_CF1);
 211         lcdc_write(sdev, LDMLSR, scrtc->line_size);
 212         lcdc_write(sdev, LDSA1R, scrtc->dma[0]);
 213         if (format->yuv)
 214                 lcdc_write(sdev, LDSA2R, scrtc->dma[1]);
 215         lcdc_write(sdev, LDSM1R, 0);
 216
 217         /* Word and long word swap. */
 218         switch (format->fourcc) {
 219         case DRM_FORMAT_RGB565:
 220         case DRM_FORMAT_NV21:
 221         case DRM_FORMAT_NV61:
 222         case DRM_FORMAT_NV42:
 223                 value = LDDDSR_LS | LDDDSR_WS;
 224                 break;
 225         case DRM_FORMAT_RGB888:
 226         case DRM_FORMAT_NV12:
 227         case DRM_FORMAT_NV16:
 228         case DRM_FORMAT_NV24:
 229                 value = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS;
 230                 break;
 231         case DRM_FORMAT_ARGB8888:
 232         default:
 233                 value = LDDDSR_LS;
 234                 break;
 235         }
 236         lcdc_write(sdev, LDDDSR, value);
 237
 238         /* Setup planes. */
 239         drm_for_each_legacy_plane(plane, dev) {
 240                 if (plane->crtc == crtc)
 241                         shmob_drm_plane_setup(plane);
 242         }
 243
 244         /* Enable the display output. */
 245         lcdc_write(sdev, LDCNT1R, LDCNT1R_DE);
 246
 247         shmob_drm_crtc_start_stop(scrtc, true);
 248
 249         scrtc->started = true;
 250 }
 251
 252 static void shmob_drm_crtc_stop(struct shmob_drm_crtc *scrtc)
 253 {
 254         struct drm_crtc *crtc = &scrtc->crtc;
 255         struct shmob_drm_device *sdev = crtc->dev->dev_private;
 256
 257         if (!scrtc->started)
 258                 return;
 259
 260         /* Stop the LCDC. */
 261         shmob_drm_crtc_start_stop(scrtc, false);
 262
 263         /* Disable the display output. */
 264         lcdc_write(sdev, LDCNT1R, 0);
 265
 266         /* Stop clocks. */
 267         shmob_drm_clk_off(sdev);
 268
 269         scrtc->started = false;
 270 }
 271
 272 void shmob_drm_crtc_suspend(struct shmob_drm_crtc *scrtc)
 273 {
 274         shmob_drm_crtc_stop(scrtc);
 275 }
 276
 277 void shmob_drm_crtc_resume(struct shmob_drm_crtc *scrtc)
 278 {
 279         if (scrtc->dpms != DRM_MODE_DPMS_ON)
 280                 return;
 281
 282         shmob_drm_crtc_start(scrtc);
 283 }
 284
 285 static void shmob_drm_crtc_compute_base(struct shmob_drm_crtc *scrtc,
 286                                         int x, int y)
 287 {
 288         struct drm_crtc *crtc = &scrtc->crtc;
 289         struct drm_framebuffer *fb = crtc->primary->fb;
 290         struct drm_gem_cma_object *gem;
 291         unsigned int bpp;
 292
 293         bpp = scrtc->format->yuv ? 8 : scrtc->format->bpp;
 294         gem = drm_fb_cma_get_gem_obj(fb, 0);
 295         scrtc->dma[0] = gem->paddr + fb->offsets[0]
 296                       + y * fb->pitches[0] + x * bpp / 8;
 297
 298         if (scrtc->format->yuv) {
 299                 bpp = scrtc->format->bpp - 8;
 300                 gem = drm_fb_cma_get_gem_obj(fb, 1);
 301                 scrtc->dma[1] = gem->paddr + fb->offsets[1]
 302                               + y / (bpp == 4 ? 2 : 1) * fb->pitches[1]
 303                               + x * (bpp == 16 ? 2 : 1);
 304         }
 305 }
 306
 307 static void shmob_drm_crtc_update_base(struct shmob_drm_crtc *scrtc)
 308 {
 309         struct drm_crtc *crtc = &scrtc->crtc;
 310         struct shmob_drm_device *sdev = crtc->dev->dev_private;
 311
 312         shmob_drm_crtc_compute_base(scrtc, crtc->x, crtc->y);
 313
 314         lcdc_write_mirror(sdev, LDSA1R, scrtc->dma[0]);
 315         if (scrtc->format->yuv)
 316                 lcdc_write_mirror(sdev, LDSA2R, scrtc->dma[1]);
 317
 318         lcdc_write(sdev, LDRCNTR, lcdc_read(sdev, LDRCNTR) ^ LDRCNTR_MRS);
 319 }
 320
 321 #define to_shmob_crtc(c)        container_of(c, struct shmob_drm_crtc, crtc)
 322
 323 static void shmob_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
 324 {
 325         struct shmob_drm_crtc *scrtc = to_shmob_crtc(crtc);
 326
 327         if (scrtc->dpms == mode)
 328                 return;
 329
 330         if (mode == DRM_MODE_DPMS_ON)
 331                 shmob_drm_crtc_start(scrtc);
 332         else
 333                 shmob_drm_crtc_stop(scrtc);
 334
 335         scrtc->dpms = mode;
 336 }
 337
 338 static void shmob_drm_crtc_mode_prepare(struct drm_crtc *crtc)
 339 {
 340         shmob_drm_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
 341 }
 342
 343 static int shmob_drm_crtc_mode_set(struct drm_crtc *crtc,
 344                                    struct drm_display_mode *mode,
 345                                    struct drm_display_mode *adjusted_mode,
 346                                    int x, int y,
 347                                    struct drm_framebuffer *old_fb)
 348 {
 349         struct shmob_drm_crtc *scrtc = to_shmob_crtc(crtc);
 350         struct shmob_drm_device *sdev = crtc->dev->dev_private;
 351         const struct shmob_drm_format_info *format;
 352
 353         format = shmob_drm_format_info(crtc->primary->fb->format->format);
 354         if (format == NULL) {
 355                 dev_dbg(sdev->dev, "mode_set: unsupported format %08x\n",
 356                         crtc->primary->fb->format->format);
 357                 return -EINVAL;
 358         }
 359
 360         scrtc->format = format;
 361         scrtc->line_size = crtc->primary->fb->pitches[0];
 362
 363         shmob_drm_crtc_compute_base(scrtc, x, y);
 364
 365         return 0;
 366 }
 367
 368 static void shmob_drm_crtc_mode_commit(struct drm_crtc *crtc)
 369 {
 370         shmob_drm_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
 371 }
 372
 373 static int shmob_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
 374                                         struct drm_framebuffer *old_fb)
 375 {
 376         shmob_drm_crtc_update_base(to_shmob_crtc(crtc));
 377
 378         return 0;
 379 }
 380
 381 static const struct drm_crtc_helper_funcs crtc_helper_funcs = {
 382         .dpms = shmob_drm_crtc_dpms,
 383         .prepare = shmob_drm_crtc_mode_prepare,
 384         .commit = shmob_drm_crtc_mode_commit,
 385         .mode_set = shmob_drm_crtc_mode_set,
 386         .mode_set_base = shmob_drm_crtc_mode_set_base,
 387 };
 388
 389 void shmob_drm_crtc_finish_page_flip(struct shmob_drm_crtc *scrtc)
 390 {
 391         struct drm_pending_vblank_event *event;
 392         struct drm_device *dev = scrtc->crtc.dev;
 393         unsigned long flags;
 394
 395         spin_lock_irqsave(&dev->event_lock, flags);
 396         event = scrtc->event;
 397         scrtc->event = NULL;
 398         if (event) {
 399                 drm_crtc_send_vblank_event(&scrtc->crtc, event);
 400                 drm_crtc_vblank_put(&scrtc->crtc);
 401         }
 402         spin_unlock_irqrestore(&dev->event_lock, flags);
 403 }
 404
 405 static int shmob_drm_crtc_page_flip(struct drm_crtc *crtc,
 406                                     struct drm_framebuffer *fb,
 407                                     struct drm_pending_vblank_event *event,
 408                                     uint32_t page_flip_flags,
 409                                     struct drm_modeset_acquire_ctx *ctx)
 410 {
 411         struct shmob_drm_crtc *scrtc = to_shmob_crtc(crtc);
 412         struct drm_device *dev = scrtc->crtc.dev;
 413         unsigned long flags;
 414
 415         spin_lock_irqsave(&dev->event_lock, flags);
 416         if (scrtc->event != NULL) {
 417                 spin_unlock_irqrestore(&dev->event_lock, flags);
 418                 return -EBUSY;
 419         }
 420         spin_unlock_irqrestore(&dev->event_lock, flags);
 421
 422         crtc->primary->fb = fb;
 423         shmob_drm_crtc_update_base(scrtc);
 424
 425         if (event) {
 426                 event->pipe = 0;
 427                 drm_crtc_vblank_get(&scrtc->crtc);
 428                 spin_lock_irqsave(&dev->event_lock, flags);
 429                 scrtc->event = event;
 430                 spin_unlock_irqrestore(&dev->event_lock, flags);
 431         }
 432
 433         return 0;
 434 }
 435
 436 static void shmob_drm_crtc_enable_vblank(struct shmob_drm_device *sdev,
 437                                          bool enable)
 438 {
 439         unsigned long flags;
 440         u32 ldintr;
 441
 442         /* Be careful not to acknowledge any pending interrupt. */
 443         spin_lock_irqsave(&sdev->irq_lock, flags);
 444         ldintr = lcdc_read(sdev, LDINTR) | LDINTR_STATUS_MASK;
 445         if (enable)
 446                 ldintr |= LDINTR_VEE;
 447         else
 448                 ldintr &= ~LDINTR_VEE;
 449         lcdc_write(sdev, LDINTR, ldintr);
 450         spin_unlock_irqrestore(&sdev->irq_lock, flags);
 451 }
 452
 453 static int shmob_drm_enable_vblank(struct drm_crtc *crtc)
 454 {
 455         struct shmob_drm_device *sdev = crtc->dev->dev_private;
 456
 457         shmob_drm_crtc_enable_vblank(sdev, true);
 458
 459         return 0;
 460 }
 461
 462 static void shmob_drm_disable_vblank(struct drm_crtc *crtc)
 463 {
 464         struct shmob_drm_device *sdev = crtc->dev->dev_private;
 465
 466         shmob_drm_crtc_enable_vblank(sdev, false);
 467 }
 468
 469 static const struct drm_crtc_funcs crtc_funcs = {
 470         .destroy = drm_crtc_cleanup,
 471         .set_config = drm_crtc_helper_set_config,
 472         .page_flip = shmob_drm_crtc_page_flip,
 473         .enable_vblank = shmob_drm_enable_vblank,
 474         .disable_vblank = shmob_drm_disable_vblank,
 475 };
 476
 477 int shmob_drm_crtc_create(struct shmob_drm_device *sdev)
 478 {
 479         struct drm_crtc *crtc = &sdev->crtc.crtc;
 480         int ret;
 481
 482         sdev->crtc.dpms = DRM_MODE_DPMS_OFF;
 483
 484         ret = drm_crtc_init(sdev->ddev, crtc, &crtc_funcs);
 485         if (ret < 0)
 486                 return ret;
 487
 488         drm_crtc_helper_add(crtc, &crtc_helper_funcs);
 489
 490         return 0;
 491 }
 492
 493 /* -----------------------------------------------------------------------------
 494  * Encoder
 495  */
 496
 497 #define to_shmob_encoder(e) \
 498         container_of(e, struct shmob_drm_encoder, encoder)
 499
 500 static void shmob_drm_encoder_dpms(struct drm_encoder *encoder, int mode)
 501 {
 502         struct shmob_drm_encoder *senc = to_shmob_encoder(encoder);
 503         struct shmob_drm_device *sdev = encoder->dev->dev_private;
 504         struct shmob_drm_connector *scon = &sdev->connector;
 505
 506         if (senc->dpms == mode)
 507                 return;
 508
 509         shmob_drm_backlight_dpms(scon, mode);
 510
 511         senc->dpms = mode;
 512 }
 513
 514 static bool shmob_drm_encoder_mode_fixup(struct drm_encoder *encoder,
 515                                          const struct drm_display_mode *mode,
 516                                          struct drm_display_mode *adjusted_mode)
 517 {
 518         struct drm_device *dev = encoder->dev;
 519         struct shmob_drm_device *sdev = dev->dev_private;
 520         struct drm_connector *connector = &sdev->connector.connector;
 521         const struct drm_display_mode *panel_mode;
 522
 523         if (list_empty(&connector->modes)) {
 524                 dev_dbg(dev->dev, "mode_fixup: empty modes list\n");
 525                 return false;
 526         }
 527
 528         /* The flat panel mode is fixed, just copy it to the adjusted mode. */
 529         panel_mode = list_first_entry(&connector->modes,
 530                                       struct drm_display_mode, head);
 531         drm_mode_copy(adjusted_mode, panel_mode);
 532
 533         return true;
 534 }
 535
 536 static void shmob_drm_encoder_mode_prepare(struct drm_encoder *encoder)
 537 {
 538         /* No-op, everything is handled in the CRTC code. */
 539 }
 540
 541 static void shmob_drm_encoder_mode_set(struct drm_encoder *encoder,
 542                                        struct drm_display_mode *mode,
 543                                        struct drm_display_mode *adjusted_mode)
 544 {
 545         /* No-op, everything is handled in the CRTC code. */
 546 }
 547
 548 static void shmob_drm_encoder_mode_commit(struct drm_encoder *encoder)
 549 {
 550         /* No-op, everything is handled in the CRTC code. */
 551 }
 552
 553 static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
 554         .dpms = shmob_drm_encoder_dpms,
 555         .mode_fixup = shmob_drm_encoder_mode_fixup,
 556         .prepare = shmob_drm_encoder_mode_prepare,
 557         .commit = shmob_drm_encoder_mode_commit,
 558         .mode_set = shmob_drm_encoder_mode_set,
 559 };
 560
 561 static void shmob_drm_encoder_destroy(struct drm_encoder *encoder)
 562 {
 563         drm_encoder_cleanup(encoder);
 564 }
 565
 566 static const struct drm_encoder_funcs encoder_funcs = {
 567         .destroy = shmob_drm_encoder_destroy,
 568 };
 569
 570 int shmob_drm_encoder_create(struct shmob_drm_device *sdev)
 571 {
 572         struct drm_encoder *encoder = &sdev->encoder.encoder;
 573         int ret;
 574
 575         sdev->encoder.dpms = DRM_MODE_DPMS_OFF;
 576
 577         encoder->possible_crtcs = 1;
 578
 579         ret = drm_encoder_init(sdev->ddev, encoder, &encoder_funcs,
 580                                DRM_MODE_ENCODER_LVDS, NULL);
 581         if (ret < 0)
 582                 return ret;
 583
 584         drm_encoder_helper_add(encoder, &encoder_helper_funcs);
 585
 586         return 0;
 587 }
 588
 589 /* -----------------------------------------------------------------------------
 590  * Connector
 591  */
 592
 593 #define to_shmob_connector(c) \
 594         container_of(c, struct shmob_drm_connector, connector)
 595
 596 static int shmob_drm_connector_get_modes(struct drm_connector *connector)
 597 {
 598         struct shmob_drm_device *sdev = connector->dev->dev_private;
 599         struct drm_display_mode *mode;
 600
 601         mode = drm_mode_create(connector->dev);
 602         if (mode == NULL)
 603                 return 0;
 604
 605         mode->type = DRM_MODE_TYPE_PREFERRED | DRM_MODE_TYPE_DRIVER;
 606         mode->clock = sdev->pdata->panel.mode.clock;
 607         mode->hdisplay = sdev->pdata->panel.mode.hdisplay;
 608         mode->hsync_start = sdev->pdata->panel.mode.hsync_start;
 609         mode->hsync_end = sdev->pdata->panel.mode.hsync_end;
 610         mode->htotal = sdev->pdata->panel.mode.htotal;
 611         mode->vdisplay = sdev->pdata->panel.mode.vdisplay;
 612         mode->vsync_start = sdev->pdata->panel.mode.vsync_start;
 613         mode->vsync_end = sdev->pdata->panel.mode.vsync_end;
 614         mode->vtotal = sdev->pdata->panel.mode.vtotal;
 615         mode->flags = sdev->pdata->panel.mode.flags;
 616
 617         drm_mode_set_name(mode);
 618         drm_mode_probed_add(connector, mode);
 619
 620         connector->display_info.width_mm = sdev->pdata->panel.width_mm;
 621         connector->display_info.height_mm = sdev->pdata->panel.height_mm;
 622
 623         return 1;
 624 }
 625
 626 static struct drm_encoder *
 627 shmob_drm_connector_best_encoder(struct drm_connector *connector)
 628 {
 629         struct shmob_drm_connector *scon = to_shmob_connector(connector);
 630
 631         return scon->encoder;
 632 }
 633
 634 static const struct drm_connector_helper_funcs connector_helper_funcs = {
 635         .get_modes = shmob_drm_connector_get_modes,
 636         .best_encoder = shmob_drm_connector_best_encoder,
 637 };
 638
 639 static void shmob_drm_connector_destroy(struct drm_connector *connector)
 640 {
 641         struct shmob_drm_connector *scon = to_shmob_connector(connector);
 642
 643         shmob_drm_backlight_exit(scon);
 644         drm_connector_unregister(connector);
 645         drm_connector_cleanup(connector);
 646 }
 647
 648 static const struct drm_connector_funcs connector_funcs = {
 649         .dpms = drm_helper_connector_dpms,
 650         .fill_modes = drm_helper_probe_single_connector_modes,
 651         .destroy = shmob_drm_connector_destroy,
 652 };
 653
 654 int shmob_drm_connector_create(struct shmob_drm_device *sdev,
 655                                struct drm_encoder *encoder)
 656 {
 657         struct drm_connector *connector = &sdev->connector.connector;
 658         int ret;
 659
 660         sdev->connector.encoder = encoder;
 661
 662         connector->display_info.width_mm = sdev->pdata->panel.width_mm;
 663         connector->display_info.height_mm = sdev->pdata->panel.height_mm;
 664
 665         ret = drm_connector_init(sdev->ddev, connector, &connector_funcs,
 666                                  DRM_MODE_CONNECTOR_LVDS);
 667         if (ret < 0)
 668                 return ret;
 669
 670         drm_connector_helper_add(connector, &connector_helper_funcs);
 671
 672         ret = shmob_drm_backlight_init(&sdev->connector);
 673         if (ret < 0)
 674                 goto err_cleanup;
 675
 676         ret = drm_connector_attach_encoder(connector, encoder);
 677         if (ret < 0)
 678                 goto err_backlight;
 679
 680         drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
 681         drm_object_property_set_value(&connector->base,
 682                 sdev->ddev->mode_config.dpms_property, DRM_MODE_DPMS_OFF);
 683
 684         return 0;
 685
 686 err_backlight:
 687         shmob_drm_backlight_exit(&sdev->connector);
 688 err_cleanup:
 689         drm_connector_cleanup(connector);
 690         return ret;
 691 }