drivers/gpu/drm/shmobile/shmob_drm_crtc.c

   1 /*
   2  * shmob_drm_crtc.c  --  SH Mobile DRM CRTCs
   3  *
   4  * Copyright (C) 2012 Renesas Electronics 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 #include <drm/drm_plane_helper.h>
  23
  24 #include <video/sh_mobile_meram.h>
  25
  26 #include "shmob_drm_backlight.h"
  27 #include "shmob_drm_crtc.h"
  28 #include "shmob_drm_drv.h"
  29 #include "shmob_drm_kms.h"
  30 #include "shmob_drm_plane.h"
  31 #include "shmob_drm_regs.h"
  32
  33 /*
  34  * TODO: panel support
  35  */
  36
  37 /* -----------------------------------------------------------------------------
  38  * Clock management
  39  */
  40
  41 static int shmob_drm_clk_on(struct shmob_drm_device *sdev)
  42 {
  43         int ret;
  44
  45         if (sdev->clock) {
  46                 ret = clk_prepare_enable(sdev->clock);
  47                 if (ret < 0)
  48                         return ret;
  49         }
  50 #if 0
  51         if (sdev->meram_dev && sdev->meram_dev->pdev)
  52                 pm_runtime_get_sync(&sdev->meram_dev->pdev->dev);
  53 #endif
  54
  55         return 0;
  56 }
  57
  58 static void shmob_drm_clk_off(struct shmob_drm_device *sdev)
  59 {
  60 #if 0
  61         if (sdev->meram_dev && sdev->meram_dev->pdev)
  62                 pm_runtime_put_sync(&sdev->meram_dev->pdev->dev);
  63 #endif
  64         if (sdev->clock)
  65                 clk_disable_unprepare(sdev->clock);
  66 }
  67
  68 /* -----------------------------------------------------------------------------
  69  * CRTC
  70  */
  71
  72 static void shmob_drm_crtc_setup_geometry(struct shmob_drm_crtc *scrtc)
  73 {
  74         struct drm_crtc *crtc = &scrtc->crtc;
  75         struct shmob_drm_device *sdev = crtc->dev->dev_private;
  76         const struct shmob_drm_interface_data *idata = &sdev->pdata->iface;
  77         const struct drm_display_mode *mode = &crtc->mode;
  78         u32 value;
  79
  80         value = sdev->ldmt1r
  81               | ((mode->flags & DRM_MODE_FLAG_PVSYNC) ? 0 : LDMT1R_VPOL)
  82               | ((mode->flags & DRM_MODE_FLAG_PHSYNC) ? 0 : LDMT1R_HPOL)
  83               | ((idata->flags & SHMOB_DRM_IFACE_FL_DWPOL) ? LDMT1R_DWPOL : 0)
  84               | ((idata->flags & SHMOB_DRM_IFACE_FL_DIPOL) ? LDMT1R_DIPOL : 0)
  85               | ((idata->flags & SHMOB_DRM_IFACE_FL_DAPOL) ? LDMT1R_DAPOL : 0)
  86               | ((idata->flags & SHMOB_DRM_IFACE_FL_HSCNT) ? LDMT1R_HSCNT : 0)
  87               | ((idata->flags & SHMOB_DRM_IFACE_FL_DWCNT) ? LDMT1R_DWCNT : 0);
  88         lcdc_write(sdev, LDMT1R, value);
  89
  90         if (idata->interface >= SHMOB_DRM_IFACE_SYS8A &&
  91             idata->interface <= SHMOB_DRM_IFACE_SYS24) {
  92                 /* Setup SYS bus. */
  93                 value = (idata->sys.cs_setup << LDMT2R_CSUP_SHIFT)
  94                       | (idata->sys.vsync_active_high ? LDMT2R_RSV : 0)
  95                       | (idata->sys.vsync_dir_input ? LDMT2R_VSEL : 0)
  96                       | (idata->sys.write_setup << LDMT2R_WCSC_SHIFT)
  97                       | (idata->sys.write_cycle << LDMT2R_WCEC_SHIFT)
  98                       | (idata->sys.write_strobe << LDMT2R_WCLW_SHIFT);
  99                 lcdc_write(sdev, LDMT2R, value);
 100
 101                 value = (idata->sys.read_latch << LDMT3R_RDLC_SHIFT)
 102                       | (idata->sys.read_setup << LDMT3R_RCSC_SHIFT)
 103                       | (idata->sys.read_cycle << LDMT3R_RCEC_SHIFT)
 104                       | (idata->sys.read_strobe << LDMT3R_RCLW_SHIFT);
 105                 lcdc_write(sdev, LDMT3R, value);
 106         }
 107
 108         value = ((mode->hdisplay / 8) << 16)                    /* HDCN */
 109               | (mode->htotal / 8);                             /* HTCN */
 110         lcdc_write(sdev, LDHCNR, value);
 111
 112         value = (((mode->hsync_end - mode->hsync_start) / 8) << 16) /* HSYNW */
 113               | (mode->hsync_start / 8);                        /* HSYNP */
 114         lcdc_write(sdev, LDHSYNR, value);
 115
 116         value = ((mode->hdisplay & 7) << 24) | ((mode->htotal & 7) << 16)
 117               | (((mode->hsync_end - mode->hsync_start) & 7) << 8)
 118               | (mode->hsync_start & 7);
 119         lcdc_write(sdev, LDHAJR, value);
 120
 121         value = ((mode->vdisplay) << 16)                        /* VDLN */
 122               | mode->vtotal;                                   /* VTLN */
 123         lcdc_write(sdev, LDVLNR, value);
 124
 125         value = ((mode->vsync_end - mode->vsync_start) << 16)   /* VSYNW */
 126               | mode->vsync_start;                              /* VSYNP */
 127         lcdc_write(sdev, LDVSYNR, value);
 128 }
 129
 130 static void shmob_drm_crtc_start_stop(struct shmob_drm_crtc *scrtc, bool start)
 131 {
 132         struct shmob_drm_device *sdev = scrtc->crtc.dev->dev_private;
 133         u32 value;
 134
 135         value = lcdc_read(sdev, LDCNT2R);
 136         if (start)
 137                 lcdc_write(sdev, LDCNT2R, value | LDCNT2R_DO);
 138         else
 139                 lcdc_write(sdev, LDCNT2R, value & ~LDCNT2R_DO);
 140
 141         /* Wait until power is applied/stopped. */
 142         while (1) {
 143                 value = lcdc_read(sdev, LDPMR) & LDPMR_LPS;
 144                 if ((start && value) || (!start && !value))
 145                         break;
 146
 147                 cpu_relax();
 148         }
 149
 150         if (!start) {
 151                 /* Stop the dot clock. */
 152                 lcdc_write(sdev, LDDCKSTPR, LDDCKSTPR_DCKSTP);
 153         }
 154 }
 155
 156 /*
 157  * shmob_drm_crtc_start - Configure and start the LCDC
 158  * @scrtc: the SH Mobile CRTC
 159  *
 160  * Configure and start the LCDC device. External devices (clocks, MERAM, panels,
 161  * ...) are not touched by this function.
 162  */
 163 static void shmob_drm_crtc_start(struct shmob_drm_crtc *scrtc)
 164 {
 165         struct drm_crtc *crtc = &scrtc->crtc;
 166         struct shmob_drm_device *sdev = crtc->dev->dev_private;
 167         const struct shmob_drm_interface_data *idata = &sdev->pdata->iface;
 168         const struct shmob_drm_format_info *format;
 169         struct drm_device *dev = sdev->ddev;
 170         struct drm_plane *plane;
 171         u32 value;
 172         int ret;
 173
 174         if (scrtc->started)
 175                 return;
 176
 177         format = shmob_drm_format_info(crtc->primary->fb->pixel_format);
 178         if (WARN_ON(format == NULL))
 179                 return;
 180
 181         /* Enable clocks before accessing the hardware. */
 182         ret = shmob_drm_clk_on(sdev);
 183         if (ret < 0)
 184                 return;
 185
 186         /* Reset and enable the LCDC. */
 187         lcdc_write(sdev, LDCNT2R, lcdc_read(sdev, LDCNT2R) | LDCNT2R_BR);
 188         lcdc_wait_bit(sdev, LDCNT2R, LDCNT2R_BR, 0);
 189         lcdc_write(sdev, LDCNT2R, LDCNT2R_ME);
 190
 191         /* Stop the LCDC first and disable all interrupts. */
 192         shmob_drm_crtc_start_stop(scrtc, false);
 193         lcdc_write(sdev, LDINTR, 0);
 194
 195         /* Configure power supply, dot clocks and start them. */
 196         lcdc_write(sdev, LDPMR, 0);
 197
 198         value = sdev->lddckr;
 199         if (idata->clk_div) {
 200                 /* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider
 201                  * denominator.
 202                  */
 203                 lcdc_write(sdev, LDDCKPAT1R, 0);
 204                 lcdc_write(sdev, LDDCKPAT2R, (1 << (idata->clk_div / 2)) - 1);
 205
 206                 if (idata->clk_div == 1)
 207                         value |= LDDCKR_MOSEL;
 208                 else
 209                         value |= idata->clk_div;
 210         }
 211
 212         lcdc_write(sdev, LDDCKR, value);
 213         lcdc_write(sdev, LDDCKSTPR, 0);
 214         lcdc_wait_bit(sdev, LDDCKSTPR, ~0, 0);
 215
 216         /* TODO: Setup SYS panel */
 217
 218         /* Setup geometry, format, frame buffer memory and operation mode. */
 219         shmob_drm_crtc_setup_geometry(scrtc);
 220
 221         /* TODO: Handle YUV colorspaces. Hardcode REC709 for now. */
 222         lcdc_write(sdev, LDDFR, format->lddfr | LDDFR_CF1);
 223         lcdc_write(sdev, LDMLSR, scrtc->line_size);
 224         lcdc_write(sdev, LDSA1R, scrtc->dma[0]);
 225         if (format->yuv)
 226                 lcdc_write(sdev, LDSA2R, scrtc->dma[1]);
 227         lcdc_write(sdev, LDSM1R, 0);
 228
 229         /* Word and long word swap. */
 230         switch (format->fourcc) {
 231         case DRM_FORMAT_RGB565:
 232         case DRM_FORMAT_NV21:
 233         case DRM_FORMAT_NV61:
 234         case DRM_FORMAT_NV42:
 235                 value = LDDDSR_LS | LDDDSR_WS;
 236                 break;
 237         case DRM_FORMAT_RGB888:
 238         case DRM_FORMAT_NV12:
 239         case DRM_FORMAT_NV16:
 240         case DRM_FORMAT_NV24:
 241                 value = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS;
 242                 break;
 243         case DRM_FORMAT_ARGB8888:
 244         default:
 245                 value = LDDDSR_LS;
 246                 break;
 247         }
 248         lcdc_write(sdev, LDDDSR, value);
 249
 250         /* Setup planes. */
 251         drm_for_each_legacy_plane(plane, dev) {
 252                 if (plane->crtc == crtc)
 253                         shmob_drm_plane_setup(plane);
 254         }
 255
 256         /* Enable the display output. */
 257         lcdc_write(sdev, LDCNT1R, LDCNT1R_DE);
 258
 259         shmob_drm_crtc_start_stop(scrtc, true);
 260
 261         scrtc->started = true;
 262 }
 263
 264 static void shmob_drm_crtc_stop(struct shmob_drm_crtc *scrtc)
 265 {
 266         struct drm_crtc *crtc = &scrtc->crtc;
 267         struct shmob_drm_device *sdev = crtc->dev->dev_private;
 268
 269         if (!scrtc->started)
 270                 return;
 271
 272         /* Disable the MERAM cache. */
 273         if (scrtc->cache) {
 274                 sh_mobile_meram_cache_free(sdev->meram, scrtc->cache);
 275                 scrtc->cache = NULL;
 276         }
 277
 278         /* Stop the LCDC. */
 279         shmob_drm_crtc_start_stop(scrtc, false);
 280
 281         /* Disable the display output. */
 282         lcdc_write(sdev, LDCNT1R, 0);
 283
 284         /* Stop clocks. */
 285         shmob_drm_clk_off(sdev);
 286
 287         scrtc->started = false;
 288 }
 289
 290 void shmob_drm_crtc_suspend(struct shmob_drm_crtc *scrtc)
 291 {
 292         shmob_drm_crtc_stop(scrtc);
 293 }
 294
 295 void shmob_drm_crtc_resume(struct shmob_drm_crtc *scrtc)
 296 {
 297         if (scrtc->dpms != DRM_MODE_DPMS_ON)
 298                 return;
 299
 300         shmob_drm_crtc_start(scrtc);
 301 }
 302
 303 static void shmob_drm_crtc_compute_base(struct shmob_drm_crtc *scrtc,
 304                                         int x, int y)
 305 {
 306         struct drm_crtc *crtc = &scrtc->crtc;
 307         struct drm_framebuffer *fb = crtc->primary->fb;
 308         struct shmob_drm_device *sdev = crtc->dev->dev_private;
 309         struct drm_gem_cma_object *gem;
 310         unsigned int bpp;
 311
 312         bpp = scrtc->format->yuv ? 8 : scrtc->format->bpp;
 313         gem = drm_fb_cma_get_gem_obj(fb, 0);
 314         scrtc->dma[0] = gem->paddr + fb->offsets[0]
 315                       + y * fb->pitches[0] + x * bpp / 8;
 316
 317         if (scrtc->format->yuv) {
 318                 bpp = scrtc->format->bpp - 8;
 319                 gem = drm_fb_cma_get_gem_obj(fb, 1);
 320                 scrtc->dma[1] = gem->paddr + fb->offsets[1]
 321                               + y / (bpp == 4 ? 2 : 1) * fb->pitches[1]
 322                               + x * (bpp == 16 ? 2 : 1);
 323         }
 324
 325         if (scrtc->cache)
 326                 sh_mobile_meram_cache_update(sdev->meram, scrtc->cache,
 327                                              scrtc->dma[0], scrtc->dma[1],
 328                                              &scrtc->dma[0], &scrtc->dma[1]);
 329 }
 330
 331 static void shmob_drm_crtc_update_base(struct shmob_drm_crtc *scrtc)
 332 {
 333         struct drm_crtc *crtc = &scrtc->crtc;
 334         struct shmob_drm_device *sdev = crtc->dev->dev_private;
 335
 336         shmob_drm_crtc_compute_base(scrtc, crtc->x, crtc->y);
 337
 338         lcdc_write_mirror(sdev, LDSA1R, scrtc->dma[0]);
 339         if (scrtc->format->yuv)
 340                 lcdc_write_mirror(sdev, LDSA2R, scrtc->dma[1]);
 341
 342         lcdc_write(sdev, LDRCNTR, lcdc_read(sdev, LDRCNTR) ^ LDRCNTR_MRS);
 343 }
 344
 345 #define to_shmob_crtc(c)        container_of(c, struct shmob_drm_crtc, crtc)
 346
 347 static void shmob_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
 348 {
 349         struct shmob_drm_crtc *scrtc = to_shmob_crtc(crtc);
 350
 351         if (scrtc->dpms == mode)
 352                 return;
 353
 354         if (mode == DRM_MODE_DPMS_ON)
 355                 shmob_drm_crtc_start(scrtc);
 356         else
 357                 shmob_drm_crtc_stop(scrtc);
 358
 359         scrtc->dpms = mode;
 360 }
 361
 362 static bool shmob_drm_crtc_mode_fixup(struct drm_crtc *crtc,
 363                                       const struct drm_display_mode *mode,
 364                                       struct drm_display_mode *adjusted_mode)
 365 {
 366         return true;
 367 }
 368
 369 static void shmob_drm_crtc_mode_prepare(struct drm_crtc *crtc)
 370 {
 371         shmob_drm_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
 372 }
 373
 374 static int shmob_drm_crtc_mode_set(struct drm_crtc *crtc,
 375                                    struct drm_display_mode *mode,
 376                                    struct drm_display_mode *adjusted_mode,
 377                                    int x, int y,
 378                                    struct drm_framebuffer *old_fb)
 379 {
 380         struct shmob_drm_crtc *scrtc = to_shmob_crtc(crtc);
 381         struct shmob_drm_device *sdev = crtc->dev->dev_private;
 382         const struct sh_mobile_meram_cfg *mdata = sdev->pdata->meram;
 383         const struct shmob_drm_format_info *format;
 384         void *cache;
 385
 386         format = shmob_drm_format_info(crtc->primary->fb->pixel_format);
 387         if (format == NULL) {
 388                 dev_dbg(sdev->dev, "mode_set: unsupported format %08x\n",
 389                         crtc->primary->fb->pixel_format);
 390                 return -EINVAL;
 391         }
 392
 393         scrtc->format = format;
 394         scrtc->line_size = crtc->primary->fb->pitches[0];
 395
 396         if (sdev->meram) {
 397                 /* Enable MERAM cache if configured. We need to de-init
 398                  * configured ICBs before we can re-initialize them.
 399                  */
 400                 if (scrtc->cache) {
 401                         sh_mobile_meram_cache_free(sdev->meram, scrtc->cache);
 402                         scrtc->cache = NULL;
 403                 }
 404
 405                 cache = sh_mobile_meram_cache_alloc(sdev->meram, mdata,
 406                                                     crtc->primary->fb->pitches[0],
 407                                                     adjusted_mode->vdisplay,
 408                                                     format->meram,
 409                                                     &scrtc->line_size);
 410                 if (!IS_ERR(cache))
 411                         scrtc->cache = cache;
 412         }
 413
 414         shmob_drm_crtc_compute_base(scrtc, x, y);
 415
 416         return 0;
 417 }
 418
 419 static void shmob_drm_crtc_mode_commit(struct drm_crtc *crtc)
 420 {
 421         shmob_drm_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
 422 }
 423
 424 static int shmob_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
 425                                         struct drm_framebuffer *old_fb)
 426 {
 427         shmob_drm_crtc_update_base(to_shmob_crtc(crtc));
 428
 429         return 0;
 430 }
 431
 432 static const struct drm_crtc_helper_funcs crtc_helper_funcs = {
 433         .dpms = shmob_drm_crtc_dpms,
 434         .mode_fixup = shmob_drm_crtc_mode_fixup,
 435         .prepare = shmob_drm_crtc_mode_prepare,
 436         .commit = shmob_drm_crtc_mode_commit,
 437         .mode_set = shmob_drm_crtc_mode_set,
 438         .mode_set_base = shmob_drm_crtc_mode_set_base,
 439 };
 440
 441 void shmob_drm_crtc_cancel_page_flip(struct shmob_drm_crtc *scrtc,
 442                                      struct drm_file *file)
 443 {
 444         struct drm_pending_vblank_event *event;
 445         struct drm_device *dev = scrtc->crtc.dev;
 446         unsigned long flags;
 447
 448         /* Destroy the pending vertical blanking event associated with the
 449          * pending page flip, if any, and disable vertical blanking interrupts.
 450          */
 451         spin_lock_irqsave(&dev->event_lock, flags);
 452         event = scrtc->event;
 453         if (event && event->base.file_priv == file) {
 454                 scrtc->event = NULL;
 455                 event->base.destroy(&event->base);
 456                 drm_vblank_put(dev, 0);
 457         }
 458         spin_unlock_irqrestore(&dev->event_lock, flags);
 459 }
 460
 461 void shmob_drm_crtc_finish_page_flip(struct shmob_drm_crtc *scrtc)
 462 {
 463         struct drm_pending_vblank_event *event;
 464         struct drm_device *dev = scrtc->crtc.dev;
 465         unsigned long flags;
 466
 467         spin_lock_irqsave(&dev->event_lock, flags);
 468         event = scrtc->event;
 469         scrtc->event = NULL;
 470         if (event) {
 471                 drm_send_vblank_event(dev, 0, event);
 472                 drm_vblank_put(dev, 0);
 473         }
 474         spin_unlock_irqrestore(&dev->event_lock, flags);
 475 }
 476
 477 static int shmob_drm_crtc_page_flip(struct drm_crtc *crtc,
 478                                     struct drm_framebuffer *fb,
 479                                     struct drm_pending_vblank_event *event,
 480                                     uint32_t page_flip_flags)
 481 {
 482         struct shmob_drm_crtc *scrtc = to_shmob_crtc(crtc);
 483         struct drm_device *dev = scrtc->crtc.dev;
 484         unsigned long flags;
 485
 486         spin_lock_irqsave(&dev->event_lock, flags);
 487         if (scrtc->event != NULL) {
 488                 spin_unlock_irqrestore(&dev->event_lock, flags);
 489                 return -EBUSY;
 490         }
 491         spin_unlock_irqrestore(&dev->event_lock, flags);
 492
 493         crtc->primary->fb = fb;
 494         shmob_drm_crtc_update_base(scrtc);
 495
 496         if (event) {
 497                 event->pipe = 0;
 498                 drm_vblank_get(dev, 0);
 499                 spin_lock_irqsave(&dev->event_lock, flags);
 500                 scrtc->event = event;
 501                 spin_unlock_irqrestore(&dev->event_lock, flags);
 502         }
 503
 504         return 0;
 505 }
 506
 507 static const struct drm_crtc_funcs crtc_funcs = {
 508         .destroy = drm_crtc_cleanup,
 509         .set_config = drm_crtc_helper_set_config,
 510         .page_flip = shmob_drm_crtc_page_flip,
 511 };
 512
 513 int shmob_drm_crtc_create(struct shmob_drm_device *sdev)
 514 {
 515         struct drm_crtc *crtc = &sdev->crtc.crtc;
 516         int ret;
 517
 518         sdev->crtc.dpms = DRM_MODE_DPMS_OFF;
 519
 520         ret = drm_crtc_init(sdev->ddev, crtc, &crtc_funcs);
 521         if (ret < 0)
 522                 return ret;
 523
 524         drm_crtc_helper_add(crtc, &crtc_helper_funcs);
 525
 526         return 0;
 527 }
 528
 529 /* -----------------------------------------------------------------------------
 530  * Encoder
 531  */
 532
 533 #define to_shmob_encoder(e) \
 534         container_of(e, struct shmob_drm_encoder, encoder)
 535
 536 static void shmob_drm_encoder_dpms(struct drm_encoder *encoder, int mode)
 537 {
 538         struct shmob_drm_encoder *senc = to_shmob_encoder(encoder);
 539         struct shmob_drm_device *sdev = encoder->dev->dev_private;
 540         struct shmob_drm_connector *scon = &sdev->connector;
 541
 542         if (senc->dpms == mode)
 543                 return;
 544
 545         shmob_drm_backlight_dpms(scon, mode);
 546
 547         senc->dpms = mode;
 548 }
 549
 550 static bool shmob_drm_encoder_mode_fixup(struct drm_encoder *encoder,
 551                                          const struct drm_display_mode *mode,
 552                                          struct drm_display_mode *adjusted_mode)
 553 {
 554         struct drm_device *dev = encoder->dev;
 555         struct shmob_drm_device *sdev = dev->dev_private;
 556         struct drm_connector *connector = &sdev->connector.connector;
 557         const struct drm_display_mode *panel_mode;
 558
 559         if (list_empty(&connector->modes)) {
 560                 dev_dbg(dev->dev, "mode_fixup: empty modes list\n");
 561                 return false;
 562         }
 563
 564         /* The flat panel mode is fixed, just copy it to the adjusted mode. */
 565         panel_mode = list_first_entry(&connector->modes,
 566                                       struct drm_display_mode, head);
 567         drm_mode_copy(adjusted_mode, panel_mode);
 568
 569         return true;
 570 }
 571
 572 static void shmob_drm_encoder_mode_prepare(struct drm_encoder *encoder)
 573 {
 574         /* No-op, everything is handled in the CRTC code. */
 575 }
 576
 577 static void shmob_drm_encoder_mode_set(struct drm_encoder *encoder,
 578                                        struct drm_display_mode *mode,
 579                                        struct drm_display_mode *adjusted_mode)
 580 {
 581         /* No-op, everything is handled in the CRTC code. */
 582 }
 583
 584 static void shmob_drm_encoder_mode_commit(struct drm_encoder *encoder)
 585 {
 586         /* No-op, everything is handled in the CRTC code. */
 587 }
 588
 589 static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
 590         .dpms = shmob_drm_encoder_dpms,
 591         .mode_fixup = shmob_drm_encoder_mode_fixup,
 592         .prepare = shmob_drm_encoder_mode_prepare,
 593         .commit = shmob_drm_encoder_mode_commit,
 594         .mode_set = shmob_drm_encoder_mode_set,
 595 };
 596
 597 static void shmob_drm_encoder_destroy(struct drm_encoder *encoder)
 598 {
 599         drm_encoder_cleanup(encoder);
 600 }
 601
 602 static const struct drm_encoder_funcs encoder_funcs = {
 603         .destroy = shmob_drm_encoder_destroy,
 604 };
 605
 606 int shmob_drm_encoder_create(struct shmob_drm_device *sdev)
 607 {
 608         struct drm_encoder *encoder = &sdev->encoder.encoder;
 609         int ret;
 610
 611         sdev->encoder.dpms = DRM_MODE_DPMS_OFF;
 612
 613         encoder->possible_crtcs = 1;
 614
 615         ret = drm_encoder_init(sdev->ddev, encoder, &encoder_funcs,
 616                                DRM_MODE_ENCODER_LVDS, NULL);
 617         if (ret < 0)
 618                 return ret;
 619
 620         drm_encoder_helper_add(encoder, &encoder_helper_funcs);
 621
 622         return 0;
 623 }
 624
 625 void shmob_drm_crtc_enable_vblank(struct shmob_drm_device *sdev, bool enable)
 626 {
 627         unsigned long flags;
 628         u32 ldintr;
 629
 630         /* Be careful not to acknowledge any pending interrupt. */
 631         spin_lock_irqsave(&sdev->irq_lock, flags);
 632         ldintr = lcdc_read(sdev, LDINTR) | LDINTR_STATUS_MASK;
 633         if (enable)
 634                 ldintr |= LDINTR_VEE;
 635         else
 636                 ldintr &= ~LDINTR_VEE;
 637         lcdc_write(sdev, LDINTR, ldintr);
 638         spin_unlock_irqrestore(&sdev->irq_lock, flags);
 639 }
 640
 641 /* -----------------------------------------------------------------------------
 642  * Connector
 643  */
 644
 645 #define to_shmob_connector(c) \
 646         container_of(c, struct shmob_drm_connector, connector)
 647
 648 static int shmob_drm_connector_get_modes(struct drm_connector *connector)
 649 {
 650         struct shmob_drm_device *sdev = connector->dev->dev_private;
 651         struct drm_display_mode *mode;
 652
 653         mode = drm_mode_create(connector->dev);
 654         if (mode == NULL)
 655                 return 0;
 656
 657         mode->type = DRM_MODE_TYPE_PREFERRED | DRM_MODE_TYPE_DRIVER;
 658         mode->clock = sdev->pdata->panel.mode.clock;
 659         mode->hdisplay = sdev->pdata->panel.mode.hdisplay;
 660         mode->hsync_start = sdev->pdata->panel.mode.hsync_start;
 661         mode->hsync_end = sdev->pdata->panel.mode.hsync_end;
 662         mode->htotal = sdev->pdata->panel.mode.htotal;
 663         mode->vdisplay = sdev->pdata->panel.mode.vdisplay;
 664         mode->vsync_start = sdev->pdata->panel.mode.vsync_start;
 665         mode->vsync_end = sdev->pdata->panel.mode.vsync_end;
 666         mode->vtotal = sdev->pdata->panel.mode.vtotal;
 667         mode->flags = sdev->pdata->panel.mode.flags;
 668
 669         drm_mode_set_name(mode);
 670         drm_mode_probed_add(connector, mode);
 671
 672         connector->display_info.width_mm = sdev->pdata->panel.width_mm;
 673         connector->display_info.height_mm = sdev->pdata->panel.height_mm;
 674
 675         return 1;
 676 }
 677
 678 static struct drm_encoder *
 679 shmob_drm_connector_best_encoder(struct drm_connector *connector)
 680 {
 681         struct shmob_drm_connector *scon = to_shmob_connector(connector);
 682
 683         return scon->encoder;
 684 }
 685
 686 static const struct drm_connector_helper_funcs connector_helper_funcs = {
 687         .get_modes = shmob_drm_connector_get_modes,
 688         .best_encoder = shmob_drm_connector_best_encoder,
 689 };
 690
 691 static void shmob_drm_connector_destroy(struct drm_connector *connector)
 692 {
 693         struct shmob_drm_connector *scon = to_shmob_connector(connector);
 694
 695         shmob_drm_backlight_exit(scon);
 696         drm_connector_unregister(connector);
 697         drm_connector_cleanup(connector);
 698 }
 699
 700 static enum drm_connector_status
 701 shmob_drm_connector_detect(struct drm_connector *connector, bool force)
 702 {
 703         return connector_status_connected;
 704 }
 705
 706 static const struct drm_connector_funcs connector_funcs = {
 707         .dpms = drm_helper_connector_dpms,
 708         .detect = shmob_drm_connector_detect,
 709         .fill_modes = drm_helper_probe_single_connector_modes,
 710         .destroy = shmob_drm_connector_destroy,
 711 };
 712
 713 int shmob_drm_connector_create(struct shmob_drm_device *sdev,
 714                                struct drm_encoder *encoder)
 715 {
 716         struct drm_connector *connector = &sdev->connector.connector;
 717         int ret;
 718
 719         sdev->connector.encoder = encoder;
 720
 721         connector->display_info.width_mm = sdev->pdata->panel.width_mm;
 722         connector->display_info.height_mm = sdev->pdata->panel.height_mm;
 723
 724         ret = drm_connector_init(sdev->ddev, connector, &connector_funcs,
 725                                  DRM_MODE_CONNECTOR_LVDS);
 726         if (ret < 0)
 727                 return ret;
 728
 729         drm_connector_helper_add(connector, &connector_helper_funcs);
 730         ret = drm_connector_register(connector);
 731         if (ret < 0)
 732                 goto err_cleanup;
 733
 734         ret = shmob_drm_backlight_init(&sdev->connector);
 735         if (ret < 0)
 736                 goto err_sysfs;
 737
 738         ret = drm_mode_connector_attach_encoder(connector, encoder);
 739         if (ret < 0)
 740                 goto err_backlight;
 741
 742         connector->encoder = encoder;
 743
 744         drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
 745         drm_object_property_set_value(&connector->base,
 746                 sdev->ddev->mode_config.dpms_property, DRM_MODE_DPMS_OFF);
 747
 748         return 0;
 749
 750 err_backlight:
 751         shmob_drm_backlight_exit(&sdev->connector);
 752 err_sysfs:
 753         drm_connector_unregister(connector);
 754 err_cleanup:
 755         drm_connector_cleanup(connector);
 756         return ret;
 757 }