drivers/gpu/drm/shmobile/shmob_drm_crtc.c

   1 /*
   2  * shmob_drm_crtc.c  --  SH Mobile DRM CRTCs
   3  *
   4  * Copyright (C) 2012 Renesas Corporation
   5  *
   6  * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  */
  13
  14 #include <linux/backlight.h>
  15 #include <linux/clk.h>
  16
  17 #include <drm/drmP.h>
  18 #include <drm/drm_crtc.h>
  19 #include <drm/drm_crtc_helper.h>
  20 #include <drm/drm_fb_cma_helper.h>
  21 #include <drm/drm_gem_cma_helper.h>
  22
  23 #include <video/sh_mobile_meram.h>
  24
  25 #include "shmob_drm_backlight.h"
  26 #include "shmob_drm_crtc.h"
  27 #include "shmob_drm_drv.h"
  28 #include "shmob_drm_kms.h"
  29 #include "shmob_drm_plane.h"
  30 #include "shmob_drm_regs.h"
  31
  32 /*
  33  * TODO: panel support
  34  */
  35
  36 /* -----------------------------------------------------------------------------
  37  * Clock management
  38  */
  39
  40 static void shmob_drm_clk_on(struct shmob_drm_device *sdev)
  41 {
  42         if (sdev->clock)
  43                 clk_enable(sdev->clock);
  44 #if 0
  45         if (sdev->meram_dev && sdev->meram_dev->pdev)
  46                 pm_runtime_get_sync(&sdev->meram_dev->pdev->dev);
  47 #endif
  48 }
  49
  50 static void shmob_drm_clk_off(struct shmob_drm_device *sdev)
  51 {
  52 #if 0
  53         if (sdev->meram_dev && sdev->meram_dev->pdev)
  54                 pm_runtime_put_sync(&sdev->meram_dev->pdev->dev);
  55 #endif
  56         if (sdev->clock)
  57                 clk_disable(sdev->clock);
  58 }
  59
  60 /* -----------------------------------------------------------------------------
  61  * CRTC
  62  */
  63
  64 static void shmob_drm_crtc_setup_geometry(struct shmob_drm_crtc *scrtc)
  65 {
  66         struct drm_crtc *crtc = &scrtc->crtc;
  67         struct shmob_drm_device *sdev = crtc->dev->dev_private;
  68         const struct shmob_drm_interface_data *idata = &sdev->pdata->iface;
  69         const struct drm_display_mode *mode = &crtc->mode;
  70         u32 value;
  71
  72         value = sdev->ldmt1r
  73               | ((mode->flags & DRM_MODE_FLAG_PVSYNC) ? 0 : LDMT1R_VPOL)
  74               | ((mode->flags & DRM_MODE_FLAG_PHSYNC) ? 0 : LDMT1R_HPOL)
  75               | ((idata->flags & SHMOB_DRM_IFACE_FL_DWPOL) ? LDMT1R_DWPOL : 0)
  76               | ((idata->flags & SHMOB_DRM_IFACE_FL_DIPOL) ? LDMT1R_DIPOL : 0)
  77               | ((idata->flags & SHMOB_DRM_IFACE_FL_DAPOL) ? LDMT1R_DAPOL : 0)
  78               | ((idata->flags & SHMOB_DRM_IFACE_FL_HSCNT) ? LDMT1R_HSCNT : 0)
  79               | ((idata->flags & SHMOB_DRM_IFACE_FL_DWCNT) ? LDMT1R_DWCNT : 0);
  80         lcdc_write(sdev, LDMT1R, value);
  81
  82         if (idata->interface >= SHMOB_DRM_IFACE_SYS8A &&
  83             idata->interface <= SHMOB_DRM_IFACE_SYS24) {
  84                 /* Setup SYS bus. */
  85                 value = (idata->sys.cs_setup << LDMT2R_CSUP_SHIFT)
  86                       | (idata->sys.vsync_active_high ? LDMT2R_RSV : 0)
  87                       | (idata->sys.vsync_dir_input ? LDMT2R_VSEL : 0)
  88                       | (idata->sys.write_setup << LDMT2R_WCSC_SHIFT)
  89                       | (idata->sys.write_cycle << LDMT2R_WCEC_SHIFT)
  90                       | (idata->sys.write_strobe << LDMT2R_WCLW_SHIFT);
  91                 lcdc_write(sdev, LDMT2R, value);
  92
  93                 value = (idata->sys.read_latch << LDMT3R_RDLC_SHIFT)
  94                       | (idata->sys.read_setup << LDMT3R_RCSC_SHIFT)
  95                       | (idata->sys.read_cycle << LDMT3R_RCEC_SHIFT)
  96                       | (idata->sys.read_strobe << LDMT3R_RCLW_SHIFT);
  97                 lcdc_write(sdev, LDMT3R, value);
  98         }
  99
 100         value = ((mode->hdisplay / 8) << 16)                    /* HDCN */
 101               | (mode->htotal / 8);                             /* HTCN */
 102         lcdc_write(sdev, LDHCNR, value);
 103
 104         value = (((mode->hsync_end - mode->hsync_start) / 8) << 16) /* HSYNW */
 105               | (mode->hsync_start / 8);                        /* HSYNP */
 106         lcdc_write(sdev, LDHSYNR, value);
 107
 108         value = ((mode->hdisplay & 7) << 24) | ((mode->htotal & 7) << 16)
 109               | (((mode->hsync_end - mode->hsync_start) & 7) << 8)
 110               | (mode->hsync_start & 7);
 111         lcdc_write(sdev, LDHAJR, value);
 112
 113         value = ((mode->vdisplay) << 16)                        /* VDLN */
 114               | mode->vtotal;                                   /* VTLN */
 115         lcdc_write(sdev, LDVLNR, value);
 116
 117         value = ((mode->vsync_end - mode->vsync_start) << 16)   /* VSYNW */
 118               | mode->vsync_start;                              /* VSYNP */
 119         lcdc_write(sdev, LDVSYNR, value);
 120 }
 121
 122 static void shmob_drm_crtc_start_stop(struct shmob_drm_crtc *scrtc, bool start)
 123 {
 124         struct shmob_drm_device *sdev = scrtc->crtc.dev->dev_private;
 125         u32 value;
 126
 127         value = lcdc_read(sdev, LDCNT2R);
 128         if (start)
 129                 lcdc_write(sdev, LDCNT2R, value | LDCNT2R_DO);
 130         else
 131                 lcdc_write(sdev, LDCNT2R, value & ~LDCNT2R_DO);
 132
 133         /* Wait until power is applied/stopped. */
 134         while (1) {
 135                 value = lcdc_read(sdev, LDPMR) & LDPMR_LPS;
 136                 if ((start && value) || (!start && !value))
 137                         break;
 138
 139                 cpu_relax();
 140         }
 141
 142         if (!start) {
 143                 /* Stop the dot clock. */
 144                 lcdc_write(sdev, LDDCKSTPR, LDDCKSTPR_DCKSTP);
 145         }
 146 }
 147
 148 /*
 149  * shmob_drm_crtc_start - Configure and start the LCDC
 150  * @scrtc: the SH Mobile CRTC
 151  *
 152  * Configure and start the LCDC device. External devices (clocks, MERAM, panels,
 153  * ...) are not touched by this function.
 154  */
 155 static void shmob_drm_crtc_start(struct shmob_drm_crtc *scrtc)
 156 {
 157         struct drm_crtc *crtc = &scrtc->crtc;
 158         struct shmob_drm_device *sdev = crtc->dev->dev_private;
 159         const struct shmob_drm_interface_data *idata = &sdev->pdata->iface;
 160         const struct shmob_drm_format_info *format;
 161         struct drm_device *dev = sdev->ddev;
 162         struct drm_plane *plane;
 163         u32 value;
 164
 165         if (scrtc->started)
 166                 return;
 167
 168         format = shmob_drm_format_info(crtc->fb->pixel_format);
 169         if (WARN_ON(format == NULL))
 170                 return;
 171
 172         /* Enable clocks before accessing the hardware. */
 173         shmob_drm_clk_on(sdev);
 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         list_for_each_entry(plane, &dev->mode_config.plane_list, head) {
 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         /* Disable the MERAM cache. */
 262         if (scrtc->cache) {
 263                 sh_mobile_meram_cache_free(sdev->meram, scrtc->cache);
 264                 scrtc->cache = NULL;
 265         }
 266
 267         /* Stop the LCDC. */
 268         shmob_drm_crtc_start_stop(scrtc, false);
 269
 270         /* Disable the display output. */
 271         lcdc_write(sdev, LDCNT1R, 0);
 272
 273         /* Stop clocks. */
 274         shmob_drm_clk_off(sdev);
 275
 276         scrtc->started = false;
 277 }
 278
 279 void shmob_drm_crtc_suspend(struct shmob_drm_crtc *scrtc)
 280 {
 281         shmob_drm_crtc_stop(scrtc);
 282 }
 283
 284 void shmob_drm_crtc_resume(struct shmob_drm_crtc *scrtc)
 285 {
 286         if (scrtc->dpms != DRM_MODE_DPMS_ON)
 287                 return;
 288
 289         shmob_drm_crtc_start(scrtc);
 290 }
 291
 292 static void shmob_drm_crtc_compute_base(struct shmob_drm_crtc *scrtc,
 293                                         int x, int y)
 294 {
 295         struct drm_crtc *crtc = &scrtc->crtc;
 296         struct drm_framebuffer *fb = crtc->fb;
 297         struct shmob_drm_device *sdev = crtc->dev->dev_private;
 298         struct drm_gem_cma_object *gem;
 299         unsigned int bpp;
 300
 301         bpp = scrtc->format->yuv ? 8 : scrtc->format->bpp;
 302         gem = drm_fb_cma_get_gem_obj(fb, 0);
 303         scrtc->dma[0] = gem->paddr + fb->offsets[0]
 304                       + y * fb->pitches[0] + x * bpp / 8;
 305
 306         if (scrtc->format->yuv) {
 307                 bpp = scrtc->format->bpp - 8;
 308                 gem = drm_fb_cma_get_gem_obj(fb, 1);
 309                 scrtc->dma[1] = gem->paddr + fb->offsets[1]
 310                               + y / (bpp == 4 ? 2 : 1) * fb->pitches[1]
 311                               + x * (bpp == 16 ? 2 : 1);
 312         }
 313
 314         if (scrtc->cache)
 315                 sh_mobile_meram_cache_update(sdev->meram, scrtc->cache,
 316                                              scrtc->dma[0], scrtc->dma[1],
 317                                              &scrtc->dma[0], &scrtc->dma[1]);
 318 }
 319
 320 static void shmob_drm_crtc_update_base(struct shmob_drm_crtc *scrtc)
 321 {
 322         struct drm_crtc *crtc = &scrtc->crtc;
 323         struct shmob_drm_device *sdev = crtc->dev->dev_private;
 324
 325         shmob_drm_crtc_compute_base(scrtc, crtc->x, crtc->y);
 326
 327         lcdc_write_mirror(sdev, LDSA1R, scrtc->dma[0]);
 328         if (scrtc->format->yuv)
 329                 lcdc_write_mirror(sdev, LDSA2R, scrtc->dma[1]);
 330
 331         lcdc_write(sdev, LDRCNTR, lcdc_read(sdev, LDRCNTR) ^ LDRCNTR_MRS);
 332 }
 333
 334 #define to_shmob_crtc(c)        container_of(c, struct shmob_drm_crtc, crtc)
 335
 336 static void shmob_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
 337 {
 338         struct shmob_drm_crtc *scrtc = to_shmob_crtc(crtc);
 339
 340         if (scrtc->dpms == mode)
 341                 return;
 342
 343         if (mode == DRM_MODE_DPMS_ON)
 344                 shmob_drm_crtc_start(scrtc);
 345         else
 346                 shmob_drm_crtc_stop(scrtc);
 347
 348         scrtc->dpms = mode;
 349 }
 350
 351 static bool shmob_drm_crtc_mode_fixup(struct drm_crtc *crtc,
 352                                       const struct drm_display_mode *mode,
 353                                       struct drm_display_mode *adjusted_mode)
 354 {
 355         return true;
 356 }
 357
 358 static void shmob_drm_crtc_mode_prepare(struct drm_crtc *crtc)
 359 {
 360         shmob_drm_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
 361 }
 362
 363 static int shmob_drm_crtc_mode_set(struct drm_crtc *crtc,
 364                                    struct drm_display_mode *mode,
 365                                    struct drm_display_mode *adjusted_mode,
 366                                    int x, int y,
 367                                    struct drm_framebuffer *old_fb)
 368 {
 369         struct shmob_drm_crtc *scrtc = to_shmob_crtc(crtc);
 370         struct shmob_drm_device *sdev = crtc->dev->dev_private;
 371         const struct sh_mobile_meram_cfg *mdata = sdev->pdata->meram;
 372         const struct shmob_drm_format_info *format;
 373         void *cache;
 374
 375         format = shmob_drm_format_info(crtc->fb->pixel_format);
 376         if (format == NULL) {
 377                 dev_dbg(sdev->dev, "mode_set: unsupported format %08x\n",
 378                         crtc->fb->pixel_format);
 379                 return -EINVAL;
 380         }
 381
 382         scrtc->format = format;
 383         scrtc->line_size = crtc->fb->pitches[0];
 384
 385         if (sdev->meram) {
 386                 /* Enable MERAM cache if configured. We need to de-init
 387                  * configured ICBs before we can re-initialize them.
 388                  */
 389                 if (scrtc->cache) {
 390                         sh_mobile_meram_cache_free(sdev->meram, scrtc->cache);
 391                         scrtc->cache = NULL;
 392                 }
 393
 394                 cache = sh_mobile_meram_cache_alloc(sdev->meram, mdata,
 395                                                     crtc->fb->pitches[0],
 396                                                     adjusted_mode->vdisplay,
 397                                                     format->meram,
 398                                                     &scrtc->line_size);
 399                 if (!IS_ERR(cache))
 400                         scrtc->cache = cache;
 401         }
 402
 403         shmob_drm_crtc_compute_base(scrtc, x, y);
 404
 405         return 0;
 406 }
 407
 408 static void shmob_drm_crtc_mode_commit(struct drm_crtc *crtc)
 409 {
 410         shmob_drm_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
 411 }
 412
 413 static int shmob_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
 414                                         struct drm_framebuffer *old_fb)
 415 {
 416         shmob_drm_crtc_update_base(to_shmob_crtc(crtc));
 417
 418         return 0;
 419 }
 420
 421 static const struct drm_crtc_helper_funcs crtc_helper_funcs = {
 422         .dpms = shmob_drm_crtc_dpms,
 423         .mode_fixup = shmob_drm_crtc_mode_fixup,
 424         .prepare = shmob_drm_crtc_mode_prepare,
 425         .commit = shmob_drm_crtc_mode_commit,
 426         .mode_set = shmob_drm_crtc_mode_set,
 427         .mode_set_base = shmob_drm_crtc_mode_set_base,
 428 };
 429
 430 void shmob_drm_crtc_cancel_page_flip(struct shmob_drm_crtc *scrtc,
 431                                      struct drm_file *file)
 432 {
 433         struct drm_pending_vblank_event *event;
 434         struct drm_device *dev = scrtc->crtc.dev;
 435         unsigned long flags;
 436
 437         /* Destroy the pending vertical blanking event associated with the
 438          * pending page flip, if any, and disable vertical blanking interrupts.
 439          */
 440         spin_lock_irqsave(&dev->event_lock, flags);
 441         event = scrtc->event;
 442         if (event && event->base.file_priv == file) {
 443                 scrtc->event = NULL;
 444                 event->base.destroy(&event->base);
 445                 drm_vblank_put(dev, 0);
 446         }
 447         spin_unlock_irqrestore(&dev->event_lock, flags);
 448 }
 449
 450 void shmob_drm_crtc_finish_page_flip(struct shmob_drm_crtc *scrtc)
 451 {
 452         struct drm_pending_vblank_event *event;
 453         struct drm_device *dev = scrtc->crtc.dev;
 454         unsigned long flags;
 455
 456         spin_lock_irqsave(&dev->event_lock, flags);
 457         event = scrtc->event;
 458         scrtc->event = NULL;
 459         if (event) {
 460                 drm_send_vblank_event(dev, 0, event);
 461                 drm_vblank_put(dev, 0);
 462         }
 463         spin_unlock_irqrestore(&dev->event_lock, flags);
 464 }
 465
 466 static int shmob_drm_crtc_page_flip(struct drm_crtc *crtc,
 467                                     struct drm_framebuffer *fb,
 468                                     struct drm_pending_vblank_event *event,
 469                                     uint32_t page_flip_flags)
 470 {
 471         struct shmob_drm_crtc *scrtc = to_shmob_crtc(crtc);
 472         struct drm_device *dev = scrtc->crtc.dev;
 473         unsigned long flags;
 474
 475         spin_lock_irqsave(&dev->event_lock, flags);
 476         if (scrtc->event != NULL) {
 477                 spin_unlock_irqrestore(&dev->event_lock, flags);
 478                 return -EBUSY;
 479         }
 480         spin_unlock_irqrestore(&dev->event_lock, flags);
 481
 482         crtc->fb = fb;
 483         shmob_drm_crtc_update_base(scrtc);
 484
 485         if (event) {
 486                 event->pipe = 0;
 487                 drm_vblank_get(dev, 0);
 488                 spin_lock_irqsave(&dev->event_lock, flags);
 489                 scrtc->event = event;
 490                 spin_unlock_irqrestore(&dev->event_lock, flags);
 491         }
 492
 493         return 0;
 494 }
 495
 496 static const struct drm_crtc_funcs crtc_funcs = {
 497         .destroy = drm_crtc_cleanup,
 498         .set_config = drm_crtc_helper_set_config,
 499         .page_flip = shmob_drm_crtc_page_flip,
 500 };
 501
 502 int shmob_drm_crtc_create(struct shmob_drm_device *sdev)
 503 {
 504         struct drm_crtc *crtc = &sdev->crtc.crtc;
 505         int ret;
 506
 507         sdev->crtc.dpms = DRM_MODE_DPMS_OFF;
 508
 509         ret = drm_crtc_init(sdev->ddev, crtc, &crtc_funcs);
 510         if (ret < 0)
 511                 return ret;
 512
 513         drm_crtc_helper_add(crtc, &crtc_helper_funcs);
 514
 515         return 0;
 516 }
 517
 518 /* -----------------------------------------------------------------------------
 519  * Encoder
 520  */
 521
 522 #define to_shmob_encoder(e) \
 523         container_of(e, struct shmob_drm_encoder, encoder)
 524
 525 static void shmob_drm_encoder_dpms(struct drm_encoder *encoder, int mode)
 526 {
 527         struct shmob_drm_encoder *senc = to_shmob_encoder(encoder);
 528         struct shmob_drm_device *sdev = encoder->dev->dev_private;
 529         struct shmob_drm_connector *scon = &sdev->connector;
 530
 531         if (senc->dpms == mode)
 532                 return;
 533
 534         shmob_drm_backlight_dpms(scon, mode);
 535
 536         senc->dpms = mode;
 537 }
 538
 539 static bool shmob_drm_encoder_mode_fixup(struct drm_encoder *encoder,
 540                                          const struct drm_display_mode *mode,
 541                                          struct drm_display_mode *adjusted_mode)
 542 {
 543         struct drm_device *dev = encoder->dev;
 544         struct shmob_drm_device *sdev = dev->dev_private;
 545         struct drm_connector *connector = &sdev->connector.connector;
 546         const struct drm_display_mode *panel_mode;
 547
 548         if (list_empty(&connector->modes)) {
 549                 dev_dbg(dev->dev, "mode_fixup: empty modes list\n");
 550                 return false;
 551         }
 552
 553         /* The flat panel mode is fixed, just copy it to the adjusted mode. */
 554         panel_mode = list_first_entry(&connector->modes,
 555                                       struct drm_display_mode, head);
 556         drm_mode_copy(adjusted_mode, panel_mode);
 557
 558         return true;
 559 }
 560
 561 static void shmob_drm_encoder_mode_prepare(struct drm_encoder *encoder)
 562 {
 563         /* No-op, everything is handled in the CRTC code. */
 564 }
 565
 566 static void shmob_drm_encoder_mode_set(struct drm_encoder *encoder,
 567                                        struct drm_display_mode *mode,
 568                                        struct drm_display_mode *adjusted_mode)
 569 {
 570         /* No-op, everything is handled in the CRTC code. */
 571 }
 572
 573 static void shmob_drm_encoder_mode_commit(struct drm_encoder *encoder)
 574 {
 575         /* No-op, everything is handled in the CRTC code. */
 576 }
 577
 578 static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
 579         .dpms = shmob_drm_encoder_dpms,
 580         .mode_fixup = shmob_drm_encoder_mode_fixup,
 581         .prepare = shmob_drm_encoder_mode_prepare,
 582         .commit = shmob_drm_encoder_mode_commit,
 583         .mode_set = shmob_drm_encoder_mode_set,
 584 };
 585
 586 static void shmob_drm_encoder_destroy(struct drm_encoder *encoder)
 587 {
 588         drm_encoder_cleanup(encoder);
 589 }
 590
 591 static const struct drm_encoder_funcs encoder_funcs = {
 592         .destroy = shmob_drm_encoder_destroy,
 593 };
 594
 595 int shmob_drm_encoder_create(struct shmob_drm_device *sdev)
 596 {
 597         struct drm_encoder *encoder = &sdev->encoder.encoder;
 598         int ret;
 599
 600         sdev->encoder.dpms = DRM_MODE_DPMS_OFF;
 601
 602         encoder->possible_crtcs = 1;
 603
 604         ret = drm_encoder_init(sdev->ddev, encoder, &encoder_funcs,
 605                                DRM_MODE_ENCODER_LVDS);
 606         if (ret < 0)
 607                 return ret;
 608
 609         drm_encoder_helper_add(encoder, &encoder_helper_funcs);
 610
 611         return 0;
 612 }
 613
 614 void shmob_drm_crtc_enable_vblank(struct shmob_drm_device *sdev, bool enable)
 615 {
 616         unsigned long flags;
 617         u32 ldintr;
 618
 619         /* Be careful not to acknowledge any pending interrupt. */
 620         spin_lock_irqsave(&sdev->irq_lock, flags);
 621         ldintr = lcdc_read(sdev, LDINTR) | LDINTR_STATUS_MASK;
 622         if (enable)
 623                 ldintr |= LDINTR_VEE;
 624         else
 625                 ldintr &= ~LDINTR_VEE;
 626         lcdc_write(sdev, LDINTR, ldintr);
 627         spin_unlock_irqrestore(&sdev->irq_lock, flags);
 628 }
 629
 630 /* -----------------------------------------------------------------------------
 631  * Connector
 632  */
 633
 634 #define to_shmob_connector(c) \
 635         container_of(c, struct shmob_drm_connector, connector)
 636
 637 static int shmob_drm_connector_get_modes(struct drm_connector *connector)
 638 {
 639         struct shmob_drm_device *sdev = connector->dev->dev_private;
 640         struct drm_display_mode *mode;
 641
 642         mode = drm_mode_create(connector->dev);
 643         if (mode == NULL)
 644                 return 0;
 645
 646         mode->type = DRM_MODE_TYPE_PREFERRED | DRM_MODE_TYPE_DRIVER;
 647         mode->clock = sdev->pdata->panel.mode.clock;
 648         mode->hdisplay = sdev->pdata->panel.mode.hdisplay;
 649         mode->hsync_start = sdev->pdata->panel.mode.hsync_start;
 650         mode->hsync_end = sdev->pdata->panel.mode.hsync_end;
 651         mode->htotal = sdev->pdata->panel.mode.htotal;
 652         mode->vdisplay = sdev->pdata->panel.mode.vdisplay;
 653         mode->vsync_start = sdev->pdata->panel.mode.vsync_start;
 654         mode->vsync_end = sdev->pdata->panel.mode.vsync_end;
 655         mode->vtotal = sdev->pdata->panel.mode.vtotal;
 656         mode->flags = sdev->pdata->panel.mode.flags;
 657
 658         drm_mode_set_name(mode);
 659         drm_mode_probed_add(connector, mode);
 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         return 1;
 665 }
 666
 667 static int shmob_drm_connector_mode_valid(struct drm_connector *connector,
 668                                           struct drm_display_mode *mode)
 669 {
 670         return MODE_OK;
 671 }
 672
 673 static struct drm_encoder *
 674 shmob_drm_connector_best_encoder(struct drm_connector *connector)
 675 {
 676         struct shmob_drm_connector *scon = to_shmob_connector(connector);
 677
 678         return scon->encoder;
 679 }
 680
 681 static const struct drm_connector_helper_funcs connector_helper_funcs = {
 682         .get_modes = shmob_drm_connector_get_modes,
 683         .mode_valid = shmob_drm_connector_mode_valid,
 684         .best_encoder = shmob_drm_connector_best_encoder,
 685 };
 686
 687 static void shmob_drm_connector_destroy(struct drm_connector *connector)
 688 {
 689         struct shmob_drm_connector *scon = to_shmob_connector(connector);
 690
 691         shmob_drm_backlight_exit(scon);
 692         drm_sysfs_connector_remove(connector);
 693         drm_connector_cleanup(connector);
 694 }
 695
 696 static enum drm_connector_status
 697 shmob_drm_connector_detect(struct drm_connector *connector, bool force)
 698 {
 699         return connector_status_connected;
 700 }
 701
 702 static const struct drm_connector_funcs connector_funcs = {
 703         .dpms = drm_helper_connector_dpms,
 704         .detect = shmob_drm_connector_detect,
 705         .fill_modes = drm_helper_probe_single_connector_modes,
 706         .destroy = shmob_drm_connector_destroy,
 707 };
 708
 709 int shmob_drm_connector_create(struct shmob_drm_device *sdev,
 710                                struct drm_encoder *encoder)
 711 {
 712         struct drm_connector *connector = &sdev->connector.connector;
 713         int ret;
 714
 715         sdev->connector.encoder = encoder;
 716
 717         connector->display_info.width_mm = sdev->pdata->panel.width_mm;
 718         connector->display_info.height_mm = sdev->pdata->panel.height_mm;
 719
 720         ret = drm_connector_init(sdev->ddev, connector, &connector_funcs,
 721                                  DRM_MODE_CONNECTOR_LVDS);
 722         if (ret < 0)
 723                 return ret;
 724
 725         drm_connector_helper_add(connector, &connector_helper_funcs);
 726         ret = drm_sysfs_connector_add(connector);
 727         if (ret < 0)
 728                 goto err_cleanup;
 729
 730         ret = shmob_drm_backlight_init(&sdev->connector);
 731         if (ret < 0)
 732                 goto err_sysfs;
 733
 734         ret = drm_mode_connector_attach_encoder(connector, encoder);
 735         if (ret < 0)
 736                 goto err_backlight;
 737
 738         connector->encoder = encoder;
 739
 740         drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
 741         drm_object_property_set_value(&connector->base,
 742                 sdev->ddev->mode_config.dpms_property, DRM_MODE_DPMS_OFF);
 743
 744         return 0;
 745
 746 err_backlight:
 747         shmob_drm_backlight_exit(&sdev->connector);
 748 err_sysfs:
 749         drm_sysfs_connector_remove(connector);
 750 err_cleanup:
 751         drm_connector_cleanup(connector);
 752         return ret;
 753 }