linux/drivers/gpu/drm/shmobile/shmob_drm_crtc.c
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   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
  41static 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
  58static 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
  72static 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
 130static 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 */
 163static 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->format->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
 264static 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
 290void shmob_drm_crtc_suspend(struct shmob_drm_crtc *scrtc)
 291{
 292        shmob_drm_crtc_stop(scrtc);
 293}
 294
 295void 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
 303static 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
 331static 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
 347static 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
 362static void shmob_drm_crtc_mode_prepare(struct drm_crtc *crtc)
 363{
 364        shmob_drm_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
 365}
 366
 367static 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->format->format);
 380        if (format == NULL) {
 381                dev_dbg(sdev->dev, "mode_set: unsupported format %08x\n",
 382                        crtc->primary->fb->format->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
 412static void shmob_drm_crtc_mode_commit(struct drm_crtc *crtc)
 413{
 414        shmob_drm_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
 415}
 416
 417static 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
 425static 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
 433void 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_crtc_vblank_put(&scrtc->crtc);
 445        }
 446        spin_unlock_irqrestore(&dev->event_lock, flags);
 447}
 448
 449static 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                                    struct drm_modeset_acquire_ctx *ctx)
 454{
 455        struct shmob_drm_crtc *scrtc = to_shmob_crtc(crtc);
 456        struct drm_device *dev = scrtc->crtc.dev;
 457        unsigned long flags;
 458
 459        spin_lock_irqsave(&dev->event_lock, flags);
 460        if (scrtc->event != NULL) {
 461                spin_unlock_irqrestore(&dev->event_lock, flags);
 462                return -EBUSY;
 463        }
 464        spin_unlock_irqrestore(&dev->event_lock, flags);
 465
 466        crtc->primary->fb = fb;
 467        shmob_drm_crtc_update_base(scrtc);
 468
 469        if (event) {
 470                event->pipe = 0;
 471                drm_crtc_vblank_get(&scrtc->crtc);
 472                spin_lock_irqsave(&dev->event_lock, flags);
 473                scrtc->event = event;
 474                spin_unlock_irqrestore(&dev->event_lock, flags);
 475        }
 476
 477        return 0;
 478}
 479
 480static void shmob_drm_crtc_enable_vblank(struct shmob_drm_device *sdev,
 481                                         bool enable)
 482{
 483        unsigned long flags;
 484        u32 ldintr;
 485
 486        /* Be careful not to acknowledge any pending interrupt. */
 487        spin_lock_irqsave(&sdev->irq_lock, flags);
 488        ldintr = lcdc_read(sdev, LDINTR) | LDINTR_STATUS_MASK;
 489        if (enable)
 490                ldintr |= LDINTR_VEE;
 491        else
 492                ldintr &= ~LDINTR_VEE;
 493        lcdc_write(sdev, LDINTR, ldintr);
 494        spin_unlock_irqrestore(&sdev->irq_lock, flags);
 495}
 496
 497static int shmob_drm_enable_vblank(struct drm_crtc *crtc)
 498{
 499        struct shmob_drm_device *sdev = crtc->dev->dev_private;
 500
 501        shmob_drm_crtc_enable_vblank(sdev, true);
 502
 503        return 0;
 504}
 505
 506static void shmob_drm_disable_vblank(struct drm_crtc *crtc)
 507{
 508        struct shmob_drm_device *sdev = crtc->dev->dev_private;
 509
 510        shmob_drm_crtc_enable_vblank(sdev, false);
 511}
 512
 513static const struct drm_crtc_funcs crtc_funcs = {
 514        .destroy = drm_crtc_cleanup,
 515        .set_config = drm_crtc_helper_set_config,
 516        .page_flip = shmob_drm_crtc_page_flip,
 517        .enable_vblank = shmob_drm_enable_vblank,
 518        .disable_vblank = shmob_drm_disable_vblank,
 519};
 520
 521int shmob_drm_crtc_create(struct shmob_drm_device *sdev)
 522{
 523        struct drm_crtc *crtc = &sdev->crtc.crtc;
 524        int ret;
 525
 526        sdev->crtc.dpms = DRM_MODE_DPMS_OFF;
 527
 528        ret = drm_crtc_init(sdev->ddev, crtc, &crtc_funcs);
 529        if (ret < 0)
 530                return ret;
 531
 532        drm_crtc_helper_add(crtc, &crtc_helper_funcs);
 533
 534        return 0;
 535}
 536
 537/* -----------------------------------------------------------------------------
 538 * Encoder
 539 */
 540
 541#define to_shmob_encoder(e) \
 542        container_of(e, struct shmob_drm_encoder, encoder)
 543
 544static void shmob_drm_encoder_dpms(struct drm_encoder *encoder, int mode)
 545{
 546        struct shmob_drm_encoder *senc = to_shmob_encoder(encoder);
 547        struct shmob_drm_device *sdev = encoder->dev->dev_private;
 548        struct shmob_drm_connector *scon = &sdev->connector;
 549
 550        if (senc->dpms == mode)
 551                return;
 552
 553        shmob_drm_backlight_dpms(scon, mode);
 554
 555        senc->dpms = mode;
 556}
 557
 558static bool shmob_drm_encoder_mode_fixup(struct drm_encoder *encoder,
 559                                         const struct drm_display_mode *mode,
 560                                         struct drm_display_mode *adjusted_mode)
 561{
 562        struct drm_device *dev = encoder->dev;
 563        struct shmob_drm_device *sdev = dev->dev_private;
 564        struct drm_connector *connector = &sdev->connector.connector;
 565        const struct drm_display_mode *panel_mode;
 566
 567        if (list_empty(&connector->modes)) {
 568                dev_dbg(dev->dev, "mode_fixup: empty modes list\n");
 569                return false;
 570        }
 571
 572        /* The flat panel mode is fixed, just copy it to the adjusted mode. */
 573        panel_mode = list_first_entry(&connector->modes,
 574                                      struct drm_display_mode, head);
 575        drm_mode_copy(adjusted_mode, panel_mode);
 576
 577        return true;
 578}
 579
 580static void shmob_drm_encoder_mode_prepare(struct drm_encoder *encoder)
 581{
 582        /* No-op, everything is handled in the CRTC code. */
 583}
 584
 585static void shmob_drm_encoder_mode_set(struct drm_encoder *encoder,
 586                                       struct drm_display_mode *mode,
 587                                       struct drm_display_mode *adjusted_mode)
 588{
 589        /* No-op, everything is handled in the CRTC code. */
 590}
 591
 592static void shmob_drm_encoder_mode_commit(struct drm_encoder *encoder)
 593{
 594        /* No-op, everything is handled in the CRTC code. */
 595}
 596
 597static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
 598        .dpms = shmob_drm_encoder_dpms,
 599        .mode_fixup = shmob_drm_encoder_mode_fixup,
 600        .prepare = shmob_drm_encoder_mode_prepare,
 601        .commit = shmob_drm_encoder_mode_commit,
 602        .mode_set = shmob_drm_encoder_mode_set,
 603};
 604
 605static void shmob_drm_encoder_destroy(struct drm_encoder *encoder)
 606{
 607        drm_encoder_cleanup(encoder);
 608}
 609
 610static const struct drm_encoder_funcs encoder_funcs = {
 611        .destroy = shmob_drm_encoder_destroy,
 612};
 613
 614int shmob_drm_encoder_create(struct shmob_drm_device *sdev)
 615{
 616        struct drm_encoder *encoder = &sdev->encoder.encoder;
 617        int ret;
 618
 619        sdev->encoder.dpms = DRM_MODE_DPMS_OFF;
 620
 621        encoder->possible_crtcs = 1;
 622
 623        ret = drm_encoder_init(sdev->ddev, encoder, &encoder_funcs,
 624                               DRM_MODE_ENCODER_LVDS, NULL);
 625        if (ret < 0)
 626                return ret;
 627
 628        drm_encoder_helper_add(encoder, &encoder_helper_funcs);
 629
 630        return 0;
 631}
 632
 633/* -----------------------------------------------------------------------------
 634 * Connector
 635 */
 636
 637#define to_shmob_connector(c) \
 638        container_of(c, struct shmob_drm_connector, connector)
 639
 640static int shmob_drm_connector_get_modes(struct drm_connector *connector)
 641{
 642        struct shmob_drm_device *sdev = connector->dev->dev_private;
 643        struct drm_display_mode *mode;
 644
 645        mode = drm_mode_create(connector->dev);
 646        if (mode == NULL)
 647                return 0;
 648
 649        mode->type = DRM_MODE_TYPE_PREFERRED | DRM_MODE_TYPE_DRIVER;
 650        mode->clock = sdev->pdata->panel.mode.clock;
 651        mode->hdisplay = sdev->pdata->panel.mode.hdisplay;
 652        mode->hsync_start = sdev->pdata->panel.mode.hsync_start;
 653        mode->hsync_end = sdev->pdata->panel.mode.hsync_end;
 654        mode->htotal = sdev->pdata->panel.mode.htotal;
 655        mode->vdisplay = sdev->pdata->panel.mode.vdisplay;
 656        mode->vsync_start = sdev->pdata->panel.mode.vsync_start;
 657        mode->vsync_end = sdev->pdata->panel.mode.vsync_end;
 658        mode->vtotal = sdev->pdata->panel.mode.vtotal;
 659        mode->flags = sdev->pdata->panel.mode.flags;
 660
 661        drm_mode_set_name(mode);
 662        drm_mode_probed_add(connector, mode);
 663
 664        connector->display_info.width_mm = sdev->pdata->panel.width_mm;
 665        connector->display_info.height_mm = sdev->pdata->panel.height_mm;
 666
 667        return 1;
 668}
 669
 670static struct drm_encoder *
 671shmob_drm_connector_best_encoder(struct drm_connector *connector)
 672{
 673        struct shmob_drm_connector *scon = to_shmob_connector(connector);
 674
 675        return scon->encoder;
 676}
 677
 678static const struct drm_connector_helper_funcs connector_helper_funcs = {
 679        .get_modes = shmob_drm_connector_get_modes,
 680        .best_encoder = shmob_drm_connector_best_encoder,
 681};
 682
 683static void shmob_drm_connector_destroy(struct drm_connector *connector)
 684{
 685        struct shmob_drm_connector *scon = to_shmob_connector(connector);
 686
 687        shmob_drm_backlight_exit(scon);
 688        drm_connector_unregister(connector);
 689        drm_connector_cleanup(connector);
 690}
 691
 692static const struct drm_connector_funcs connector_funcs = {
 693        .dpms = drm_helper_connector_dpms,
 694        .fill_modes = drm_helper_probe_single_connector_modes,
 695        .destroy = shmob_drm_connector_destroy,
 696};
 697
 698int shmob_drm_connector_create(struct shmob_drm_device *sdev,
 699                               struct drm_encoder *encoder)
 700{
 701        struct drm_connector *connector = &sdev->connector.connector;
 702        int ret;
 703
 704        sdev->connector.encoder = encoder;
 705
 706        connector->display_info.width_mm = sdev->pdata->panel.width_mm;
 707        connector->display_info.height_mm = sdev->pdata->panel.height_mm;
 708
 709        ret = drm_connector_init(sdev->ddev, connector, &connector_funcs,
 710                                 DRM_MODE_CONNECTOR_LVDS);
 711        if (ret < 0)
 712                return ret;
 713
 714        drm_connector_helper_add(connector, &connector_helper_funcs);
 715
 716        ret = shmob_drm_backlight_init(&sdev->connector);
 717        if (ret < 0)
 718                goto err_cleanup;
 719
 720        ret = drm_mode_connector_attach_encoder(connector, encoder);
 721        if (ret < 0)
 722                goto err_backlight;
 723
 724        drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
 725        drm_object_property_set_value(&connector->base,
 726                sdev->ddev->mode_config.dpms_property, DRM_MODE_DPMS_OFF);
 727
 728        return 0;
 729
 730err_backlight:
 731        shmob_drm_backlight_exit(&sdev->connector);
 732err_cleanup:
 733        drm_connector_cleanup(connector);
 734        return ret;
 735}
 736