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