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