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 int shmob_drm_clk_on(struct shmob_drm_device *sdev)
  41 {
  42         int ret;
  43
  44         if (sdev->clock) {
  45                 ret = clk_prepare_enable(sdev->clock);
  46                 if (ret < 0)
  47                         return ret;
  48         }
  49 #if 0
  50         if (sdev->meram_dev && sdev->meram_dev->pdev)
  51                 pm_runtime_get_sync(&sdev->meram_dev->pdev->dev);
  52 #endif
  53
  54         return 0;
  55 }
  56
  57 static void shmob_drm_clk_off(struct shmob_drm_device *sdev)
  58 {
  59 #if 0
  60         if (sdev->meram_dev && sdev->meram_dev->pdev)
  61                 pm_runtime_put_sync(&sdev->meram_dev->pdev->dev);
  62 #endif
  63         if (sdev->clock)
  64                 clk_disable_unprepare(sdev->clock);
  65 }
  66
  67 /* -----------------------------------------------------------------------------
  68  * CRTC
  69  */
  70
  71 static void shmob_drm_crtc_setup_geometry(struct shmob_drm_crtc *scrtc)
  72 {
  73         struct drm_crtc *crtc = &scrtc->crtc;
  74         struct shmob_drm_device *sdev = crtc->dev->dev_private;
  75         const struct shmob_drm_interface_data *idata = &sdev->pdata->iface;
  76         const struct drm_display_mode *mode = &crtc->mode;
  77         u32 value;
  78
  79         value = sdev->ldmt1r
  80               | ((mode->flags & DRM_MODE_FLAG_PVSYNC) ? 0 : LDMT1R_VPOL)
  81               | ((mode->flags & DRM_MODE_FLAG_PHSYNC) ? 0 : LDMT1R_HPOL)
  82               | ((idata->flags & SHMOB_DRM_IFACE_FL_DWPOL) ? LDMT1R_DWPOL : 0)
  83               | ((idata->flags & SHMOB_DRM_IFACE_FL_DIPOL) ? LDMT1R_DIPOL : 0)
  84               | ((idata->flags & SHMOB_DRM_IFACE_FL_DAPOL) ? LDMT1R_DAPOL : 0)
  85               | ((idata->flags & SHMOB_DRM_IFACE_FL_HSCNT) ? LDMT1R_HSCNT : 0)
  86               | ((idata->flags & SHMOB_DRM_IFACE_FL_DWCNT) ? LDMT1R_DWCNT : 0);
  87         lcdc_write(sdev, LDMT1R, value);
  88
  89         if (idata->interface >= SHMOB_DRM_IFACE_SYS8A &&
  90             idata->interface <= SHMOB_DRM_IFACE_SYS24) {
  91                 /* Setup SYS bus. */
  92                 value = (idata->sys.cs_setup << LDMT2R_CSUP_SHIFT)
  93                       | (idata->sys.vsync_active_high ? LDMT2R_RSV : 0)
  94                       | (idata->sys.vsync_dir_input ? LDMT2R_VSEL : 0)
  95                       | (idata->sys.write_setup << LDMT2R_WCSC_SHIFT)
  96                       | (idata->sys.write_cycle << LDMT2R_WCEC_SHIFT)
  97                       | (idata->sys.write_strobe << LDMT2R_WCLW_SHIFT);
  98                 lcdc_write(sdev, LDMT2R, value);
  99
 100                 value = (idata->sys.read_latch << LDMT3R_RDLC_SHIFT)
 101                       | (idata->sys.read_setup << LDMT3R_RCSC_SHIFT)
 102                       | (idata->sys.read_cycle << LDMT3R_RCEC_SHIFT)
 103                       | (idata->sys.read_strobe << LDMT3R_RCLW_SHIFT);
 104                 lcdc_write(sdev, LDMT3R, value);
 105         }
 106
 107         value = ((mode->hdisplay / 8) << 16)                    /* HDCN */
 108               | (mode->htotal / 8);                             /* HTCN */
 109         lcdc_write(sdev, LDHCNR, value);
 110
 111         value = (((mode->hsync_end - mode->hsync_start) / 8) << 16) /* HSYNW */
 112               | (mode->hsync_start / 8);                        /* HSYNP */
 113         lcdc_write(sdev, LDHSYNR, value);
 114
 115         value = ((mode->hdisplay & 7) << 24) | ((mode->htotal & 7) << 16)
 116               | (((mode->hsync_end - mode->hsync_start) & 7) << 8)
 117               | (mode->hsync_start & 7);
 118         lcdc_write(sdev, LDHAJR, value);
 119
 120         value = ((mode->vdisplay) << 16)                        /* VDLN */
 121               | mode->vtotal;                                   /* VTLN */
 122         lcdc_write(sdev, LDVLNR, value);
 123
 124         value = ((mode->vsync_end - mode->vsync_start) << 16)   /* VSYNW */
 125               | mode->vsync_start;                              /* VSYNP */
 126         lcdc_write(sdev, LDVSYNR, value);
 127 }
 128
 129 static void shmob_drm_crtc_start_stop(struct shmob_drm_crtc *scrtc, bool start)
 130 {
 131         struct shmob_drm_device *sdev = scrtc->crtc.dev->dev_private;
 132         u32 value;
 133
 134         value = lcdc_read(sdev, LDCNT2R);
 135         if (start)
 136                 lcdc_write(sdev, LDCNT2R, value | LDCNT2R_DO);
 137         else
 138                 lcdc_write(sdev, LDCNT2R, value & ~LDCNT2R_DO);
 139
 140         /* Wait until power is applied/stopped. */
 141         while (1) {
 142                 value = lcdc_read(sdev, LDPMR) & LDPMR_LPS;
 143                 if ((start && value) || (!start && !value))
 144                         break;
 145
 146                 cpu_relax();
 147         }
 148
 149         if (!start) {
 150                 /* Stop the dot clock. */
 151                 lcdc_write(sdev, LDDCKSTPR, LDDCKSTPR_DCKSTP);
 152         }
 153 }
 154
 155 /*
 156  * shmob_drm_crtc_start - Configure and start the LCDC
 157  * @scrtc: the SH Mobile CRTC
 158  *
 159  * Configure and start the LCDC device. External devices (clocks, MERAM, panels,
 160  * ...) are not touched by this function.
 161  */
 162 static void shmob_drm_crtc_start(struct shmob_drm_crtc *scrtc)
 163 {
 164         struct drm_crtc *crtc = &scrtc->crtc;
 165         struct shmob_drm_device *sdev = crtc->dev->dev_private;
 166         const struct shmob_drm_interface_data *idata = &sdev->pdata->iface;
 167         const struct shmob_drm_format_info *format;
 168         struct drm_device *dev = sdev->ddev;
 169         struct drm_plane *plane;
 170         u32 value;
 171         int ret;
 172
 173         if (scrtc->started)
 174                 return;
 175
 176         format = shmob_drm_format_info(crtc->fb->pixel_format);
 177         if (WARN_ON(format == NULL))
 178                 return;
 179
 180         /* Enable clocks before accessing the hardware. */
 181         ret = shmob_drm_clk_on(sdev);
 182         if (ret < 0)
 183                 return;
 184
 185         /* Reset and enable the LCDC. */
 186         lcdc_write(sdev, LDCNT2R, lcdc_read(sdev, LDCNT2R) | LDCNT2R_BR);
 187         lcdc_wait_bit(sdev, LDCNT2R, LDCNT2R_BR, 0);
 188         lcdc_write(sdev, LDCNT2R, LDCNT2R_ME);
 189
 190         /* Stop the LCDC first and disable all interrupts. */
 191         shmob_drm_crtc_start_stop(scrtc, false);
 192         lcdc_write(sdev, LDINTR, 0);
 193
 194         /* Configure power supply, dot clocks and start them. */
 195         lcdc_write(sdev, LDPMR, 0);
 196
 197         value = sdev->lddckr;
 198         if (idata->clk_div) {
 199                 /* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider
 200                  * denominator.
 201                  */
 202                 lcdc_write(sdev, LDDCKPAT1R, 0);
 203                 lcdc_write(sdev, LDDCKPAT2R, (1 << (idata->clk_div / 2)) - 1);
 204
 205                 if (idata->clk_div == 1)
 206                         value |= LDDCKR_MOSEL;
 207                 else
 208                         value |= idata->clk_div;
 209         }
 210
 211         lcdc_write(sdev, LDDCKR, value);
 212         lcdc_write(sdev, LDDCKSTPR, 0);
 213         lcdc_wait_bit(sdev, LDDCKSTPR, ~0, 0);
 214
 215         /* TODO: Setup SYS panel */
 216
 217         /* Setup geometry, format, frame buffer memory and operation mode. */
 218         shmob_drm_crtc_setup_geometry(scrtc);
 219
 220         /* TODO: Handle YUV colorspaces. Hardcode REC709 for now. */
 221         lcdc_write(sdev, LDDFR, format->lddfr | LDDFR_CF1);
 222         lcdc_write(sdev, LDMLSR, scrtc->line_size);
 223         lcdc_write(sdev, LDSA1R, scrtc->dma[0]);
 224         if (format->yuv)
 225                 lcdc_write(sdev, LDSA2R, scrtc->dma[1]);
 226         lcdc_write(sdev, LDSM1R, 0);
 227
 228         /* Word and long word swap. */
 229         switch (format->fourcc) {
 230         case DRM_FORMAT_RGB565:
 231         case DRM_FORMAT_NV21:
 232         case DRM_FORMAT_NV61:
 233         case DRM_FORMAT_NV42:
 234                 value = LDDDSR_LS | LDDDSR_WS;
 235                 break;
 236         case DRM_FORMAT_RGB888:
 237         case DRM_FORMAT_NV12:
 238         case DRM_FORMAT_NV16:
 239         case DRM_FORMAT_NV24:
 240                 value = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS;
 241                 break;
 242         case DRM_FORMAT_ARGB8888:
 243         default:
 244                 value = LDDDSR_LS;
 245                 break;
 246         }
 247         lcdc_write(sdev, LDDDSR, value);
 248
 249         /* Setup planes. */
 250         list_for_each_entry(plane, &dev->mode_config.plane_list, head) {
 251                 if (plane->crtc == crtc)
 252                         shmob_drm_plane_setup(plane);
 253         }
 254
 255         /* Enable the display output. */
 256         lcdc_write(sdev, LDCNT1R, LDCNT1R_DE);
 257
 258         shmob_drm_crtc_start_stop(scrtc, true);
 259
 260         scrtc->started = true;
 261 }
 262
 263 static void shmob_drm_crtc_stop(struct shmob_drm_crtc *scrtc)
 264 {
 265         struct drm_crtc *crtc = &scrtc->crtc;
 266         struct shmob_drm_device *sdev = crtc->dev->dev_private;
 267
 268         if (!scrtc->started)
 269                 return;
 270
 271         /* Disable the MERAM cache. */
 272         if (scrtc->cache) {
 273                 sh_mobile_meram_cache_free(sdev->meram, scrtc->cache);
 274                 scrtc->cache = NULL;
 275         }
 276
 277         /* Stop the LCDC. */
 278         shmob_drm_crtc_start_stop(scrtc, false);
 279
 280         /* Disable the display output. */
 281         lcdc_write(sdev, LDCNT1R, 0);
 282
 283         /* Stop clocks. */
 284         shmob_drm_clk_off(sdev);
 285
 286         scrtc->started = false;
 287 }
 288
 289 void shmob_drm_crtc_suspend(struct shmob_drm_crtc *scrtc)
 290 {
 291         shmob_drm_crtc_stop(scrtc);
 292 }
 293
 294 void shmob_drm_crtc_resume(struct shmob_drm_crtc *scrtc)
 295 {
 296         if (scrtc->dpms != DRM_MODE_DPMS_ON)
 297                 return;
 298
 299         shmob_drm_crtc_start(scrtc);
 300 }
 301
 302 static void shmob_drm_crtc_compute_base(struct shmob_drm_crtc *scrtc,
 303                                         int x, int y)
 304 {
 305         struct drm_crtc *crtc = &scrtc->crtc;
 306         struct drm_framebuffer *fb = crtc->fb;
 307         struct shmob_drm_device *sdev = crtc->dev->dev_private;
 308         struct drm_gem_cma_object *gem;
 309         unsigned int bpp;
 310
 311         bpp = scrtc->format->yuv ? 8 : scrtc->format->bpp;
 312         gem = drm_fb_cma_get_gem_obj(fb, 0);
 313         scrtc->dma[0] = gem->paddr + fb->offsets[0]
 314                       + y * fb->pitches[0] + x * bpp / 8;
 315
 316         if (scrtc->format->yuv) {
 317                 bpp = scrtc->format->bpp - 8;
 318                 gem = drm_fb_cma_get_gem_obj(fb, 1);
 319                 scrtc->dma[1] = gem->paddr + fb->offsets[1]
 320                               + y / (bpp == 4 ? 2 : 1) * fb->pitches[1]
 321                               + x * (bpp == 16 ? 2 : 1);
 322         }
 323
 324         if (scrtc->cache)
 325                 sh_mobile_meram_cache_update(sdev->meram, scrtc->cache,
 326                                              scrtc->dma[0], scrtc->dma[1],
 327                                              &scrtc->dma[0], &scrtc->dma[1]);
 328 }
 329
 330 static void shmob_drm_crtc_update_base(struct shmob_drm_crtc *scrtc)
 331 {
 332         struct drm_crtc *crtc = &scrtc->crtc;
 333         struct shmob_drm_device *sdev = crtc->dev->dev_private;
 334
 335         shmob_drm_crtc_compute_base(scrtc, crtc->x, crtc->y);
 336
 337         lcdc_write_mirror(sdev, LDSA1R, scrtc->dma[0]);
 338         if (scrtc->format->yuv)
 339                 lcdc_write_mirror(sdev, LDSA2R, scrtc->dma[1]);
 340
 341         lcdc_write(sdev, LDRCNTR, lcdc_read(sdev, LDRCNTR) ^ LDRCNTR_MRS);
 342 }
 343
 344 #define to_shmob_crtc(c)        container_of(c, struct shmob_drm_crtc, crtc)
 345
 346 static void shmob_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
 347 {
 348         struct shmob_drm_crtc *scrtc = to_shmob_crtc(crtc);
 349
 350         if (scrtc->dpms == mode)
 351                 return;
 352
 353         if (mode == DRM_MODE_DPMS_ON)
 354                 shmob_drm_crtc_start(scrtc);
 355         else
 356                 shmob_drm_crtc_stop(scrtc);
 357
 358         scrtc->dpms = mode;
 359 }
 360
 361 static bool shmob_drm_crtc_mode_fixup(struct drm_crtc *crtc,
 362                                       const struct drm_display_mode *mode,
 363                                       struct drm_display_mode *adjusted_mode)
 364 {
 365         return true;
 366 }
 367
 368 static void shmob_drm_crtc_mode_prepare(struct drm_crtc *crtc)
 369 {
 370         shmob_drm_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
 371 }
 372
 373 static int shmob_drm_crtc_mode_set(struct drm_crtc *crtc,
 374                                    struct drm_display_mode *mode,
 375                                    struct drm_display_mode *adjusted_mode,
 376                                    int x, int y,
 377                                    struct drm_framebuffer *old_fb)
 378 {
 379         struct shmob_drm_crtc *scrtc = to_shmob_crtc(crtc);
 380         struct shmob_drm_device *sdev = crtc->dev->dev_private;
 381         const struct sh_mobile_meram_cfg *mdata = sdev->pdata->meram;
 382         const struct shmob_drm_format_info *format;
 383         void *cache;
 384
 385         format = shmob_drm_format_info(crtc->fb->pixel_format);
 386         if (format == NULL) {
 387                 dev_dbg(sdev->dev, "mode_set: unsupported format %08x\n",
 388                         crtc->fb->pixel_format);
 389                 return -EINVAL;
 390         }
 391
 392         scrtc->format = format;
 393         scrtc->line_size = crtc->fb->pitches[0];
 394
 395         if (sdev->meram) {
 396                 /* Enable MERAM cache if configured. We need to de-init
 397                  * configured ICBs before we can re-initialize them.
 398                  */
 399                 if (scrtc->cache) {
 400                         sh_mobile_meram_cache_free(sdev->meram, scrtc->cache);
 401                         scrtc->cache = NULL;
 402                 }
 403
 404                 cache = sh_mobile_meram_cache_alloc(sdev->meram, mdata,
 405                                                     crtc->fb->pitches[0],
 406                                                     adjusted_mode->vdisplay,
 407                                                     format->meram,
 408                                                     &scrtc->line_size);
 409                 if (!IS_ERR(cache))
 410                         scrtc->cache = cache;
 411         }
 412
 413         shmob_drm_crtc_compute_base(scrtc, x, y);
 414
 415         return 0;
 416 }
 417
 418 static void shmob_drm_crtc_mode_commit(struct drm_crtc *crtc)
 419 {
 420         shmob_drm_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
 421 }
 422
 423 static int shmob_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
 424                                         struct drm_framebuffer *old_fb)
 425 {
 426         shmob_drm_crtc_update_base(to_shmob_crtc(crtc));
 427
 428         return 0;
 429 }
 430
 431 static const struct drm_crtc_helper_funcs crtc_helper_funcs = {
 432         .dpms = shmob_drm_crtc_dpms,
 433         .mode_fixup = shmob_drm_crtc_mode_fixup,
 434         .prepare = shmob_drm_crtc_mode_prepare,
 435         .commit = shmob_drm_crtc_mode_commit,
 436         .mode_set = shmob_drm_crtc_mode_set,
 437         .mode_set_base = shmob_drm_crtc_mode_set_base,
 438 };
 439
 440 void shmob_drm_crtc_cancel_page_flip(struct shmob_drm_crtc *scrtc,
 441                                      struct drm_file *file)
 442 {
 443         struct drm_pending_vblank_event *event;
 444         struct drm_device *dev = scrtc->crtc.dev;
 445         unsigned long flags;
 446
 447         /* Destroy the pending vertical blanking event associated with the
 448          * pending page flip, if any, and disable vertical blanking interrupts.
 449          */
 450         spin_lock_irqsave(&dev->event_lock, flags);
 451         event = scrtc->event;
 452         if (event && event->base.file_priv == file) {
 453                 scrtc->event = NULL;
 454                 event->base.destroy(&event->base);
 455                 drm_vblank_put(dev, 0);
 456         }
 457         spin_unlock_irqrestore(&dev->event_lock, flags);
 458 }
 459
 460 void shmob_drm_crtc_finish_page_flip(struct shmob_drm_crtc *scrtc)
 461 {
 462         struct drm_pending_vblank_event *event;
 463         struct drm_device *dev = scrtc->crtc.dev;
 464         unsigned long flags;
 465
 466         spin_lock_irqsave(&dev->event_lock, flags);
 467         event = scrtc->event;
 468         scrtc->event = NULL;
 469         if (event) {
 470                 drm_send_vblank_event(dev, 0, event);
 471                 drm_vblank_put(dev, 0);
 472         }
 473         spin_unlock_irqrestore(&dev->event_lock, flags);
 474 }
 475
 476 static int shmob_drm_crtc_page_flip(struct drm_crtc *crtc,
 477                                     struct drm_framebuffer *fb,
 478                                     struct drm_pending_vblank_event *event,
 479                                     uint32_t page_flip_flags)
 480 {
 481         struct shmob_drm_crtc *scrtc = to_shmob_crtc(crtc);
 482         struct drm_device *dev = scrtc->crtc.dev;
 483         unsigned long flags;
 484
 485         spin_lock_irqsave(&dev->event_lock, flags);
 486         if (scrtc->event != NULL) {
 487                 spin_unlock_irqrestore(&dev->event_lock, flags);
 488                 return -EBUSY;
 489         }
 490         spin_unlock_irqrestore(&dev->event_lock, flags);
 491
 492         crtc->fb = fb;
 493         shmob_drm_crtc_update_base(scrtc);
 494
 495         if (event) {
 496                 event->pipe = 0;
 497                 drm_vblank_get(dev, 0);
 498                 spin_lock_irqsave(&dev->event_lock, flags);
 499                 scrtc->event = event;
 500                 spin_unlock_irqrestore(&dev->event_lock, flags);
 501         }
 502
 503         return 0;
 504 }
 505
 506 static const struct drm_crtc_funcs crtc_funcs = {
 507         .destroy = drm_crtc_cleanup,
 508         .set_config = drm_crtc_helper_set_config,
 509         .page_flip = shmob_drm_crtc_page_flip,
 510 };
 511
 512 int shmob_drm_crtc_create(struct shmob_drm_device *sdev)
 513 {
 514         struct drm_crtc *crtc = &sdev->crtc.crtc;
 515         int ret;
 516
 517         sdev->crtc.dpms = DRM_MODE_DPMS_OFF;
 518
 519         ret = drm_crtc_init(sdev->ddev, crtc, &crtc_funcs);
 520         if (ret < 0)
 521                 return ret;
 522
 523         drm_crtc_helper_add(crtc, &crtc_helper_funcs);
 524
 525         return 0;
 526 }
 527
 528 /* -----------------------------------------------------------------------------
 529  * Encoder
 530  */
 531
 532 #define to_shmob_encoder(e) \
 533         container_of(e, struct shmob_drm_encoder, encoder)
 534
 535 static void shmob_drm_encoder_dpms(struct drm_encoder *encoder, int mode)
 536 {
 537         struct shmob_drm_encoder *senc = to_shmob_encoder(encoder);
 538         struct shmob_drm_device *sdev = encoder->dev->dev_private;
 539         struct shmob_drm_connector *scon = &sdev->connector;
 540
 541         if (senc->dpms == mode)
 542                 return;
 543
 544         shmob_drm_backlight_dpms(scon, mode);
 545
 546         senc->dpms = mode;
 547 }
 548
 549 static bool shmob_drm_encoder_mode_fixup(struct drm_encoder *encoder,
 550                                          const struct drm_display_mode *mode,
 551                                          struct drm_display_mode *adjusted_mode)
 552 {
 553         struct drm_device *dev = encoder->dev;
 554         struct shmob_drm_device *sdev = dev->dev_private;
 555         struct drm_connector *connector = &sdev->connector.connector;
 556         const struct drm_display_mode *panel_mode;
 557
 558         if (list_empty(&connector->modes)) {
 559                 dev_dbg(dev->dev, "mode_fixup: empty modes list\n");
 560                 return false;
 561         }
 562
 563         /* The flat panel mode is fixed, just copy it to the adjusted mode. */
 564         panel_mode = list_first_entry(&connector->modes,
 565                                       struct drm_display_mode, head);
 566         drm_mode_copy(adjusted_mode, panel_mode);
 567
 568         return true;
 569 }
 570
 571 static void shmob_drm_encoder_mode_prepare(struct drm_encoder *encoder)
 572 {
 573         /* No-op, everything is handled in the CRTC code. */
 574 }
 575
 576 static void shmob_drm_encoder_mode_set(struct drm_encoder *encoder,
 577                                        struct drm_display_mode *mode,
 578                                        struct drm_display_mode *adjusted_mode)
 579 {
 580         /* No-op, everything is handled in the CRTC code. */
 581 }
 582
 583 static void shmob_drm_encoder_mode_commit(struct drm_encoder *encoder)
 584 {
 585         /* No-op, everything is handled in the CRTC code. */
 586 }
 587
 588 static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
 589         .dpms = shmob_drm_encoder_dpms,
 590         .mode_fixup = shmob_drm_encoder_mode_fixup,
 591         .prepare = shmob_drm_encoder_mode_prepare,
 592         .commit = shmob_drm_encoder_mode_commit,
 593         .mode_set = shmob_drm_encoder_mode_set,
 594 };
 595
 596 static void shmob_drm_encoder_destroy(struct drm_encoder *encoder)
 597 {
 598         drm_encoder_cleanup(encoder);
 599 }
 600
 601 static const struct drm_encoder_funcs encoder_funcs = {
 602         .destroy = shmob_drm_encoder_destroy,
 603 };
 604
 605 int shmob_drm_encoder_create(struct shmob_drm_device *sdev)
 606 {
 607         struct drm_encoder *encoder = &sdev->encoder.encoder;
 608         int ret;
 609
 610         sdev->encoder.dpms = DRM_MODE_DPMS_OFF;
 611
 612         encoder->possible_crtcs = 1;
 613
 614         ret = drm_encoder_init(sdev->ddev, encoder, &encoder_funcs,
 615                                DRM_MODE_ENCODER_LVDS);
 616         if (ret < 0)
 617                 return ret;
 618
 619         drm_encoder_helper_add(encoder, &encoder_helper_funcs);
 620
 621         return 0;
 622 }
 623
 624 void shmob_drm_crtc_enable_vblank(struct shmob_drm_device *sdev, bool enable)
 625 {
 626         unsigned long flags;
 627         u32 ldintr;
 628
 629         /* Be careful not to acknowledge any pending interrupt. */
 630         spin_lock_irqsave(&sdev->irq_lock, flags);
 631         ldintr = lcdc_read(sdev, LDINTR) | LDINTR_STATUS_MASK;
 632         if (enable)
 633                 ldintr |= LDINTR_VEE;
 634         else
 635                 ldintr &= ~LDINTR_VEE;
 636         lcdc_write(sdev, LDINTR, ldintr);
 637         spin_unlock_irqrestore(&sdev->irq_lock, flags);
 638 }
 639
 640 /* -----------------------------------------------------------------------------
 641  * Connector
 642  */
 643
 644 #define to_shmob_connector(c) \
 645         container_of(c, struct shmob_drm_connector, connector)
 646
 647 static int shmob_drm_connector_get_modes(struct drm_connector *connector)
 648 {
 649         struct shmob_drm_device *sdev = connector->dev->dev_private;
 650         struct drm_display_mode *mode;
 651
 652         mode = drm_mode_create(connector->dev);
 653         if (mode == NULL)
 654                 return 0;
 655
 656         mode->type = DRM_MODE_TYPE_PREFERRED | DRM_MODE_TYPE_DRIVER;
 657         mode->clock = sdev->pdata->panel.mode.clock;
 658         mode->hdisplay = sdev->pdata->panel.mode.hdisplay;
 659         mode->hsync_start = sdev->pdata->panel.mode.hsync_start;
 660         mode->hsync_end = sdev->pdata->panel.mode.hsync_end;
 661         mode->htotal = sdev->pdata->panel.mode.htotal;
 662         mode->vdisplay = sdev->pdata->panel.mode.vdisplay;
 663         mode->vsync_start = sdev->pdata->panel.mode.vsync_start;
 664         mode->vsync_end = sdev->pdata->panel.mode.vsync_end;
 665         mode->vtotal = sdev->pdata->panel.mode.vtotal;
 666         mode->flags = sdev->pdata->panel.mode.flags;
 667
 668         drm_mode_set_name(mode);
 669         drm_mode_probed_add(connector, mode);
 670
 671         connector->display_info.width_mm = sdev->pdata->panel.width_mm;
 672         connector->display_info.height_mm = sdev->pdata->panel.height_mm;
 673
 674         return 1;
 675 }
 676
 677 static int shmob_drm_connector_mode_valid(struct drm_connector *connector,
 678                                           struct drm_display_mode *mode)
 679 {
 680         return MODE_OK;
 681 }
 682
 683 static struct drm_encoder *
 684 shmob_drm_connector_best_encoder(struct drm_connector *connector)
 685 {
 686         struct shmob_drm_connector *scon = to_shmob_connector(connector);
 687
 688         return scon->encoder;
 689 }
 690
 691 static const struct drm_connector_helper_funcs connector_helper_funcs = {
 692         .get_modes = shmob_drm_connector_get_modes,
 693         .mode_valid = shmob_drm_connector_mode_valid,
 694         .best_encoder = shmob_drm_connector_best_encoder,
 695 };
 696
 697 static void shmob_drm_connector_destroy(struct drm_connector *connector)
 698 {
 699         struct shmob_drm_connector *scon = to_shmob_connector(connector);
 700
 701         shmob_drm_backlight_exit(scon);
 702         drm_sysfs_connector_remove(connector);
 703         drm_connector_cleanup(connector);
 704 }
 705
 706 static enum drm_connector_status
 707 shmob_drm_connector_detect(struct drm_connector *connector, bool force)
 708 {
 709         return connector_status_connected;
 710 }
 711
 712 static const struct drm_connector_funcs connector_funcs = {
 713         .dpms = drm_helper_connector_dpms,
 714         .detect = shmob_drm_connector_detect,
 715         .fill_modes = drm_helper_probe_single_connector_modes,
 716         .destroy = shmob_drm_connector_destroy,
 717 };
 718
 719 int shmob_drm_connector_create(struct shmob_drm_device *sdev,
 720                                struct drm_encoder *encoder)
 721 {
 722         struct drm_connector *connector = &sdev->connector.connector;
 723         int ret;
 724
 725         sdev->connector.encoder = encoder;
 726
 727         connector->display_info.width_mm = sdev->pdata->panel.width_mm;
 728         connector->display_info.height_mm = sdev->pdata->panel.height_mm;
 729
 730         ret = drm_connector_init(sdev->ddev, connector, &connector_funcs,
 731                                  DRM_MODE_CONNECTOR_LVDS);
 732         if (ret < 0)
 733                 return ret;
 734
 735         drm_connector_helper_add(connector, &connector_helper_funcs);
 736         ret = drm_sysfs_connector_add(connector);
 737         if (ret < 0)
 738                 goto err_cleanup;
 739
 740         ret = shmob_drm_backlight_init(&sdev->connector);
 741         if (ret < 0)
 742                 goto err_sysfs;
 743
 744         ret = drm_mode_connector_attach_encoder(connector, encoder);
 745         if (ret < 0)
 746                 goto err_backlight;
 747
 748         connector->encoder = encoder;
 749
 750         drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
 751         drm_object_property_set_value(&connector->base,
 752                 sdev->ddev->mode_config.dpms_property, DRM_MODE_DPMS_OFF);
 753
 754         return 0;
 755
 756 err_backlight:
 757         shmob_drm_backlight_exit(&sdev->connector);
 758 err_sysfs:
 759         drm_sysfs_connector_remove(connector);
 760 err_cleanup:
 761         drm_connector_cleanup(connector);
 762         return ret;
 763 }