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 void shmob_drm_crtc_mode_prepare(struct drm_crtc *crtc)
 363 {
 364         shmob_drm_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
 365 }
 366
 367 static int shmob_drm_crtc_mode_set(struct drm_crtc *crtc,
 368                                    struct drm_display_mode *mode,
 369                                    struct drm_display_mode *adjusted_mode,
 370                                    int x, int y,
 371                                    struct drm_framebuffer *old_fb)
 372 {
 373         struct shmob_drm_crtc *scrtc = to_shmob_crtc(crtc);
 374         struct shmob_drm_device *sdev = crtc->dev->dev_private;
 375         const struct sh_mobile_meram_cfg *mdata = sdev->pdata->meram;
 376         const struct shmob_drm_format_info *format;
 377         void *cache;
 378
 379         format = shmob_drm_format_info(crtc->primary->fb->pixel_format);
 380         if (format == NULL) {
 381                 dev_dbg(sdev->dev, "mode_set: unsupported format %08x\n",
 382                         crtc->primary->fb->pixel_format);
 383                 return -EINVAL;
 384         }
 385
 386         scrtc->format = format;
 387         scrtc->line_size = crtc->primary->fb->pitches[0];
 388
 389         if (sdev->meram) {
 390                 /* Enable MERAM cache if configured. We need to de-init
 391                  * configured ICBs before we can re-initialize them.
 392                  */
 393                 if (scrtc->cache) {
 394                         sh_mobile_meram_cache_free(sdev->meram, scrtc->cache);
 395                         scrtc->cache = NULL;
 396                 }
 397
 398                 cache = sh_mobile_meram_cache_alloc(sdev->meram, mdata,
 399                                                     crtc->primary->fb->pitches[0],
 400                                                     adjusted_mode->vdisplay,
 401                                                     format->meram,
 402                                                     &scrtc->line_size);
 403                 if (!IS_ERR(cache))
 404                         scrtc->cache = cache;
 405         }
 406
 407         shmob_drm_crtc_compute_base(scrtc, x, y);
 408
 409         return 0;
 410 }
 411
 412 static void shmob_drm_crtc_mode_commit(struct drm_crtc *crtc)
 413 {
 414         shmob_drm_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
 415 }
 416
 417 static int shmob_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
 418                                         struct drm_framebuffer *old_fb)
 419 {
 420         shmob_drm_crtc_update_base(to_shmob_crtc(crtc));
 421
 422         return 0;
 423 }
 424
 425 static const struct drm_crtc_helper_funcs crtc_helper_funcs = {
 426         .dpms = shmob_drm_crtc_dpms,
 427         .prepare = shmob_drm_crtc_mode_prepare,
 428         .commit = shmob_drm_crtc_mode_commit,
 429         .mode_set = shmob_drm_crtc_mode_set,
 430         .mode_set_base = shmob_drm_crtc_mode_set_base,
 431 };
 432
 433 void shmob_drm_crtc_finish_page_flip(struct shmob_drm_crtc *scrtc)
 434 {
 435         struct drm_pending_vblank_event *event;
 436         struct drm_device *dev = scrtc->crtc.dev;
 437         unsigned long flags;
 438
 439         spin_lock_irqsave(&dev->event_lock, flags);
 440         event = scrtc->event;
 441         scrtc->event = NULL;
 442         if (event) {
 443                 drm_crtc_send_vblank_event(&scrtc->crtc, event);
 444                 drm_vblank_put(dev, 0);
 445         }
 446         spin_unlock_irqrestore(&dev->event_lock, flags);
 447 }
 448
 449 static int shmob_drm_crtc_page_flip(struct drm_crtc *crtc,
 450                                     struct drm_framebuffer *fb,
 451                                     struct drm_pending_vblank_event *event,
 452                                     uint32_t page_flip_flags)
 453 {
 454         struct shmob_drm_crtc *scrtc = to_shmob_crtc(crtc);
 455         struct drm_device *dev = scrtc->crtc.dev;
 456         unsigned long flags;
 457
 458         spin_lock_irqsave(&dev->event_lock, flags);
 459         if (scrtc->event != NULL) {
 460                 spin_unlock_irqrestore(&dev->event_lock, flags);
 461                 return -EBUSY;
 462         }
 463         spin_unlock_irqrestore(&dev->event_lock, flags);
 464
 465         crtc->primary->fb = fb;
 466         shmob_drm_crtc_update_base(scrtc);
 467
 468         if (event) {
 469                 event->pipe = 0;
 470                 drm_vblank_get(dev, 0);
 471                 spin_lock_irqsave(&dev->event_lock, flags);
 472                 scrtc->event = event;
 473                 spin_unlock_irqrestore(&dev->event_lock, flags);
 474         }
 475
 476         return 0;
 477 }
 478
 479 static const struct drm_crtc_funcs crtc_funcs = {
 480         .destroy = drm_crtc_cleanup,
 481         .set_config = drm_crtc_helper_set_config,
 482         .page_flip = shmob_drm_crtc_page_flip,
 483 };
 484
 485 int shmob_drm_crtc_create(struct shmob_drm_device *sdev)
 486 {
 487         struct drm_crtc *crtc = &sdev->crtc.crtc;
 488         int ret;
 489
 490         sdev->crtc.dpms = DRM_MODE_DPMS_OFF;
 491
 492         ret = drm_crtc_init(sdev->ddev, crtc, &crtc_funcs);
 493         if (ret < 0)
 494                 return ret;
 495
 496         drm_crtc_helper_add(crtc, &crtc_helper_funcs);
 497
 498         return 0;
 499 }
 500
 501 /* -----------------------------------------------------------------------------
 502  * Encoder
 503  */
 504
 505 #define to_shmob_encoder(e) \
 506         container_of(e, struct shmob_drm_encoder, encoder)
 507
 508 static void shmob_drm_encoder_dpms(struct drm_encoder *encoder, int mode)
 509 {
 510         struct shmob_drm_encoder *senc = to_shmob_encoder(encoder);
 511         struct shmob_drm_device *sdev = encoder->dev->dev_private;
 512         struct shmob_drm_connector *scon = &sdev->connector;
 513
 514         if (senc->dpms == mode)
 515                 return;
 516
 517         shmob_drm_backlight_dpms(scon, mode);
 518
 519         senc->dpms = mode;
 520 }
 521
 522 static bool shmob_drm_encoder_mode_fixup(struct drm_encoder *encoder,
 523                                          const struct drm_display_mode *mode,
 524                                          struct drm_display_mode *adjusted_mode)
 525 {
 526         struct drm_device *dev = encoder->dev;
 527         struct shmob_drm_device *sdev = dev->dev_private;
 528         struct drm_connector *connector = &sdev->connector.connector;
 529         const struct drm_display_mode *panel_mode;
 530
 531         if (list_empty(&connector->modes)) {
 532                 dev_dbg(dev->dev, "mode_fixup: empty modes list\n");
 533                 return false;
 534         }
 535
 536         /* The flat panel mode is fixed, just copy it to the adjusted mode. */
 537         panel_mode = list_first_entry(&connector->modes,
 538                                       struct drm_display_mode, head);
 539         drm_mode_copy(adjusted_mode, panel_mode);
 540
 541         return true;
 542 }
 543
 544 static void shmob_drm_encoder_mode_prepare(struct drm_encoder *encoder)
 545 {
 546         /* No-op, everything is handled in the CRTC code. */
 547 }
 548
 549 static void shmob_drm_encoder_mode_set(struct drm_encoder *encoder,
 550                                        struct drm_display_mode *mode,
 551                                        struct drm_display_mode *adjusted_mode)
 552 {
 553         /* No-op, everything is handled in the CRTC code. */
 554 }
 555
 556 static void shmob_drm_encoder_mode_commit(struct drm_encoder *encoder)
 557 {
 558         /* No-op, everything is handled in the CRTC code. */
 559 }
 560
 561 static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
 562         .dpms = shmob_drm_encoder_dpms,
 563         .mode_fixup = shmob_drm_encoder_mode_fixup,
 564         .prepare = shmob_drm_encoder_mode_prepare,
 565         .commit = shmob_drm_encoder_mode_commit,
 566         .mode_set = shmob_drm_encoder_mode_set,
 567 };
 568
 569 static void shmob_drm_encoder_destroy(struct drm_encoder *encoder)
 570 {
 571         drm_encoder_cleanup(encoder);
 572 }
 573
 574 static const struct drm_encoder_funcs encoder_funcs = {
 575         .destroy = shmob_drm_encoder_destroy,
 576 };
 577
 578 int shmob_drm_encoder_create(struct shmob_drm_device *sdev)
 579 {
 580         struct drm_encoder *encoder = &sdev->encoder.encoder;
 581         int ret;
 582
 583         sdev->encoder.dpms = DRM_MODE_DPMS_OFF;
 584
 585         encoder->possible_crtcs = 1;
 586
 587         ret = drm_encoder_init(sdev->ddev, encoder, &encoder_funcs,
 588                                DRM_MODE_ENCODER_LVDS, NULL);
 589         if (ret < 0)
 590                 return ret;
 591
 592         drm_encoder_helper_add(encoder, &encoder_helper_funcs);
 593
 594         return 0;
 595 }
 596
 597 void shmob_drm_crtc_enable_vblank(struct shmob_drm_device *sdev, bool enable)
 598 {
 599         unsigned long flags;
 600         u32 ldintr;
 601
 602         /* Be careful not to acknowledge any pending interrupt. */
 603         spin_lock_irqsave(&sdev->irq_lock, flags);
 604         ldintr = lcdc_read(sdev, LDINTR) | LDINTR_STATUS_MASK;
 605         if (enable)
 606                 ldintr |= LDINTR_VEE;
 607         else
 608                 ldintr &= ~LDINTR_VEE;
 609         lcdc_write(sdev, LDINTR, ldintr);
 610         spin_unlock_irqrestore(&sdev->irq_lock, flags);
 611 }
 612
 613 /* -----------------------------------------------------------------------------
 614  * Connector
 615  */
 616
 617 #define to_shmob_connector(c) \
 618         container_of(c, struct shmob_drm_connector, connector)
 619
 620 static int shmob_drm_connector_get_modes(struct drm_connector *connector)
 621 {
 622         struct shmob_drm_device *sdev = connector->dev->dev_private;
 623         struct drm_display_mode *mode;
 624
 625         mode = drm_mode_create(connector->dev);
 626         if (mode == NULL)
 627                 return 0;
 628
 629         mode->type = DRM_MODE_TYPE_PREFERRED | DRM_MODE_TYPE_DRIVER;
 630         mode->clock = sdev->pdata->panel.mode.clock;
 631         mode->hdisplay = sdev->pdata->panel.mode.hdisplay;
 632         mode->hsync_start = sdev->pdata->panel.mode.hsync_start;
 633         mode->hsync_end = sdev->pdata->panel.mode.hsync_end;
 634         mode->htotal = sdev->pdata->panel.mode.htotal;
 635         mode->vdisplay = sdev->pdata->panel.mode.vdisplay;
 636         mode->vsync_start = sdev->pdata->panel.mode.vsync_start;
 637         mode->vsync_end = sdev->pdata->panel.mode.vsync_end;
 638         mode->vtotal = sdev->pdata->panel.mode.vtotal;
 639         mode->flags = sdev->pdata->panel.mode.flags;
 640
 641         drm_mode_set_name(mode);
 642         drm_mode_probed_add(connector, mode);
 643
 644         connector->display_info.width_mm = sdev->pdata->panel.width_mm;
 645         connector->display_info.height_mm = sdev->pdata->panel.height_mm;
 646
 647         return 1;
 648 }
 649
 650 static struct drm_encoder *
 651 shmob_drm_connector_best_encoder(struct drm_connector *connector)
 652 {
 653         struct shmob_drm_connector *scon = to_shmob_connector(connector);
 654
 655         return scon->encoder;
 656 }
 657
 658 static const struct drm_connector_helper_funcs connector_helper_funcs = {
 659         .get_modes = shmob_drm_connector_get_modes,
 660         .best_encoder = shmob_drm_connector_best_encoder,
 661 };
 662
 663 static void shmob_drm_connector_destroy(struct drm_connector *connector)
 664 {
 665         struct shmob_drm_connector *scon = to_shmob_connector(connector);
 666
 667         shmob_drm_backlight_exit(scon);
 668         drm_connector_unregister(connector);
 669         drm_connector_cleanup(connector);
 670 }
 671
 672 static enum drm_connector_status
 673 shmob_drm_connector_detect(struct drm_connector *connector, bool force)
 674 {
 675         return connector_status_connected;
 676 }
 677
 678 static const struct drm_connector_funcs connector_funcs = {
 679         .dpms = drm_helper_connector_dpms,
 680         .detect = shmob_drm_connector_detect,
 681         .fill_modes = drm_helper_probe_single_connector_modes,
 682         .destroy = shmob_drm_connector_destroy,
 683 };
 684
 685 int shmob_drm_connector_create(struct shmob_drm_device *sdev,
 686                                struct drm_encoder *encoder)
 687 {
 688         struct drm_connector *connector = &sdev->connector.connector;
 689         int ret;
 690
 691         sdev->connector.encoder = encoder;
 692
 693         connector->display_info.width_mm = sdev->pdata->panel.width_mm;
 694         connector->display_info.height_mm = sdev->pdata->panel.height_mm;
 695
 696         ret = drm_connector_init(sdev->ddev, connector, &connector_funcs,
 697                                  DRM_MODE_CONNECTOR_LVDS);
 698         if (ret < 0)
 699                 return ret;
 700
 701         drm_connector_helper_add(connector, &connector_helper_funcs);
 702         ret = drm_connector_register(connector);
 703         if (ret < 0)
 704                 goto err_cleanup;
 705
 706         ret = shmob_drm_backlight_init(&sdev->connector);
 707         if (ret < 0)
 708                 goto err_sysfs;
 709
 710         ret = drm_mode_connector_attach_encoder(connector, encoder);
 711         if (ret < 0)
 712                 goto err_backlight;
 713
 714         drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
 715         drm_object_property_set_value(&connector->base,
 716                 sdev->ddev->mode_config.dpms_property, DRM_MODE_DPMS_OFF);
 717
 718         return 0;
 719
 720 err_backlight:
 721         shmob_drm_backlight_exit(&sdev->connector);
 722 err_sysfs:
 723         drm_connector_unregister(connector);
 724 err_cleanup:
 725         drm_connector_cleanup(connector);
 726         return ret;
 727 }