drivers/gpu/drm/rcar-du/rcar_du_plane.c

   1 /*
   2  * rcar_du_plane.c  --  R-Car Display Unit Planes
   3  *
   4  * Copyright (C) 2013-2014 Renesas Electronics Corporation
   5  *
   6  * Contact: 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 <drm/drmP.h>
  15 #include <drm/drm_crtc.h>
  16 #include <drm/drm_crtc_helper.h>
  17 #include <drm/drm_fb_cma_helper.h>
  18 #include <drm/drm_gem_cma_helper.h>
  19
  20 #include "rcar_du_drv.h"
  21 #include "rcar_du_kms.h"
  22 #include "rcar_du_plane.h"
  23 #include "rcar_du_regs.h"
  24
  25 #define RCAR_DU_COLORKEY_NONE           (0 << 24)
  26 #define RCAR_DU_COLORKEY_SOURCE         (1 << 24)
  27 #define RCAR_DU_COLORKEY_MASK           (1 << 24)
  28
  29 struct rcar_du_kms_plane {
  30         struct drm_plane plane;
  31         struct rcar_du_plane *hwplane;
  32 };
  33
  34 static inline struct rcar_du_plane *to_rcar_plane(struct drm_plane *plane)
  35 {
  36         return container_of(plane, struct rcar_du_kms_plane, plane)->hwplane;
  37 }
  38
  39 static u32 rcar_du_plane_read(struct rcar_du_group *rgrp,
  40                               unsigned int index, u32 reg)
  41 {
  42         return rcar_du_read(rgrp->dev,
  43                             rgrp->mmio_offset + index * PLANE_OFF + reg);
  44 }
  45
  46 static void rcar_du_plane_write(struct rcar_du_group *rgrp,
  47                                 unsigned int index, u32 reg, u32 data)
  48 {
  49         rcar_du_write(rgrp->dev, rgrp->mmio_offset + index * PLANE_OFF + reg,
  50                       data);
  51 }
  52
  53 int rcar_du_plane_reserve(struct rcar_du_plane *plane,
  54                           const struct rcar_du_format_info *format)
  55 {
  56         struct rcar_du_group *rgrp = plane->group;
  57         unsigned int i;
  58         int ret = -EBUSY;
  59
  60         mutex_lock(&rgrp->planes.lock);
  61
  62         for (i = 0; i < ARRAY_SIZE(rgrp->planes.planes); ++i) {
  63                 if (!(rgrp->planes.free & (1 << i)))
  64                         continue;
  65
  66                 if (format->planes == 1 ||
  67                     rgrp->planes.free & (1 << ((i + 1) % 8)))
  68                         break;
  69         }
  70
  71         if (i == ARRAY_SIZE(rgrp->planes.planes))
  72                 goto done;
  73
  74         rgrp->planes.free &= ~(1 << i);
  75         if (format->planes == 2)
  76                 rgrp->planes.free &= ~(1 << ((i + 1) % 8));
  77
  78         plane->hwindex = i;
  79
  80         ret = 0;
  81
  82 done:
  83         mutex_unlock(&rgrp->planes.lock);
  84         return ret;
  85 }
  86
  87 void rcar_du_plane_release(struct rcar_du_plane *plane)
  88 {
  89         struct rcar_du_group *rgrp = plane->group;
  90
  91         if (plane->hwindex == -1)
  92                 return;
  93
  94         mutex_lock(&rgrp->planes.lock);
  95         rgrp->planes.free |= 1 << plane->hwindex;
  96         if (plane->format->planes == 2)
  97                 rgrp->planes.free |= 1 << ((plane->hwindex + 1) % 8);
  98         mutex_unlock(&rgrp->planes.lock);
  99
 100         plane->hwindex = -1;
 101 }
 102
 103 void rcar_du_plane_update_base(struct rcar_du_plane *plane)
 104 {
 105         struct rcar_du_group *rgrp = plane->group;
 106         unsigned int index = plane->hwindex;
 107         u32 mwr;
 108
 109         /* Memory pitch (expressed in pixels) */
 110         if (plane->format->planes == 2)
 111                 mwr = plane->pitch;
 112         else
 113                 mwr = plane->pitch * 8 / plane->format->bpp;
 114
 115         rcar_du_plane_write(rgrp, index, PnMWR, mwr);
 116
 117         /* The Y position is expressed in raster line units and must be doubled
 118          * for 32bpp formats, according to the R8A7790 datasheet. No mention of
 119          * doubling the Y position is found in the R8A7779 datasheet, but the
 120          * rule seems to apply there as well.
 121          *
 122          * Similarly, for the second plane, NV12 and NV21 formats seem to
 123          * require a halved Y position value.
 124          */
 125         rcar_du_plane_write(rgrp, index, PnSPXR, plane->src_x);
 126         rcar_du_plane_write(rgrp, index, PnSPYR, plane->src_y *
 127                             (plane->format->bpp == 32 ? 2 : 1));
 128         rcar_du_plane_write(rgrp, index, PnDSA0R, plane->dma[0]);
 129
 130         if (plane->format->planes == 2) {
 131                 index = (index + 1) % 8;
 132
 133                 rcar_du_plane_write(rgrp, index, PnSPXR, plane->src_x);
 134                 rcar_du_plane_write(rgrp, index, PnSPYR, plane->src_y *
 135                                     (plane->format->bpp == 16 ? 2 : 1) / 2);
 136                 rcar_du_plane_write(rgrp, index, PnDSA0R, plane->dma[1]);
 137         }
 138 }
 139
 140 void rcar_du_plane_compute_base(struct rcar_du_plane *plane,
 141                                 struct drm_framebuffer *fb)
 142 {
 143         struct drm_gem_cma_object *gem;
 144
 145         plane->pitch = fb->pitches[0];
 146
 147         gem = drm_fb_cma_get_gem_obj(fb, 0);
 148         plane->dma[0] = gem->paddr + fb->offsets[0];
 149
 150         if (plane->format->planes == 2) {
 151                 gem = drm_fb_cma_get_gem_obj(fb, 1);
 152                 plane->dma[1] = gem->paddr + fb->offsets[1];
 153         }
 154 }
 155
 156 static void rcar_du_plane_setup_mode(struct rcar_du_plane *plane,
 157                                      unsigned int index)
 158 {
 159         struct rcar_du_group *rgrp = plane->group;
 160         u32 colorkey;
 161         u32 pnmr;
 162
 163         /* The PnALPHAR register controls alpha-blending in 16bpp formats
 164          * (ARGB1555 and XRGB1555).
 165          *
 166          * For ARGB, set the alpha value to 0, and enable alpha-blending when
 167          * the A bit is 0. This maps A=0 to alpha=0 and A=1 to alpha=255.
 168          *
 169          * For XRGB, set the alpha value to the plane-wide alpha value and
 170          * enable alpha-blending regardless of the X bit value.
 171          */
 172         if (plane->format->fourcc != DRM_FORMAT_XRGB1555)
 173                 rcar_du_plane_write(rgrp, index, PnALPHAR, PnALPHAR_ABIT_0);
 174         else
 175                 rcar_du_plane_write(rgrp, index, PnALPHAR,
 176                                     PnALPHAR_ABIT_X | plane->alpha);
 177
 178         pnmr = PnMR_BM_MD | plane->format->pnmr;
 179
 180         /* Disable color keying when requested. YUV formats have the
 181          * PnMR_SPIM_TP_OFF bit set in their pnmr field, disabling color keying
 182          * automatically.
 183          */
 184         if ((plane->colorkey & RCAR_DU_COLORKEY_MASK) == RCAR_DU_COLORKEY_NONE)
 185                 pnmr |= PnMR_SPIM_TP_OFF;
 186
 187         /* For packed YUV formats we need to select the U/V order. */
 188         if (plane->format->fourcc == DRM_FORMAT_YUYV)
 189                 pnmr |= PnMR_YCDF_YUYV;
 190
 191         rcar_du_plane_write(rgrp, index, PnMR, pnmr);
 192
 193         switch (plane->format->fourcc) {
 194         case DRM_FORMAT_RGB565:
 195                 colorkey = ((plane->colorkey & 0xf80000) >> 8)
 196                          | ((plane->colorkey & 0x00fc00) >> 5)
 197                          | ((plane->colorkey & 0x0000f8) >> 3);
 198                 rcar_du_plane_write(rgrp, index, PnTC2R, colorkey);
 199                 break;
 200
 201         case DRM_FORMAT_ARGB1555:
 202         case DRM_FORMAT_XRGB1555:
 203                 colorkey = ((plane->colorkey & 0xf80000) >> 9)
 204                          | ((plane->colorkey & 0x00f800) >> 6)
 205                          | ((plane->colorkey & 0x0000f8) >> 3);
 206                 rcar_du_plane_write(rgrp, index, PnTC2R, colorkey);
 207                 break;
 208
 209         case DRM_FORMAT_XRGB8888:
 210         case DRM_FORMAT_ARGB8888:
 211                 rcar_du_plane_write(rgrp, index, PnTC3R,
 212                                     PnTC3R_CODE | (plane->colorkey & 0xffffff));
 213                 break;
 214         }
 215 }
 216
 217 static void __rcar_du_plane_setup(struct rcar_du_plane *plane,
 218                                   unsigned int index)
 219 {
 220         struct rcar_du_group *rgrp = plane->group;
 221         u32 ddcr2 = PnDDCR2_CODE;
 222         u32 ddcr4;
 223
 224         /* Data format
 225          *
 226          * The data format is selected by the DDDF field in PnMR and the EDF
 227          * field in DDCR4.
 228          */
 229         ddcr4 = rcar_du_plane_read(rgrp, index, PnDDCR4);
 230         ddcr4 &= ~PnDDCR4_EDF_MASK;
 231         ddcr4 |= plane->format->edf | PnDDCR4_CODE;
 232
 233         rcar_du_plane_setup_mode(plane, index);
 234
 235         if (plane->format->planes == 2) {
 236                 if (plane->hwindex != index) {
 237                         if (plane->format->fourcc == DRM_FORMAT_NV12 ||
 238                             plane->format->fourcc == DRM_FORMAT_NV21)
 239                                 ddcr2 |= PnDDCR2_Y420;
 240
 241                         if (plane->format->fourcc == DRM_FORMAT_NV21)
 242                                 ddcr2 |= PnDDCR2_NV21;
 243
 244                         ddcr2 |= PnDDCR2_DIVU;
 245                 } else {
 246                         ddcr2 |= PnDDCR2_DIVY;
 247                 }
 248         }
 249
 250         rcar_du_plane_write(rgrp, index, PnDDCR2, ddcr2);
 251         rcar_du_plane_write(rgrp, index, PnDDCR4, ddcr4);
 252
 253         /* Destination position and size */
 254         rcar_du_plane_write(rgrp, index, PnDSXR, plane->width);
 255         rcar_du_plane_write(rgrp, index, PnDSYR, plane->height);
 256         rcar_du_plane_write(rgrp, index, PnDPXR, plane->dst_x);
 257         rcar_du_plane_write(rgrp, index, PnDPYR, plane->dst_y);
 258
 259         /* Wrap-around and blinking, disabled */
 260         rcar_du_plane_write(rgrp, index, PnWASPR, 0);
 261         rcar_du_plane_write(rgrp, index, PnWAMWR, 4095);
 262         rcar_du_plane_write(rgrp, index, PnBTR, 0);
 263         rcar_du_plane_write(rgrp, index, PnMLR, 0);
 264 }
 265
 266 void rcar_du_plane_setup(struct rcar_du_plane *plane)
 267 {
 268         __rcar_du_plane_setup(plane, plane->hwindex);
 269         if (plane->format->planes == 2)
 270                 __rcar_du_plane_setup(plane, (plane->hwindex + 1) % 8);
 271
 272         rcar_du_plane_update_base(plane);
 273 }
 274
 275 static int
 276 rcar_du_plane_update(struct drm_plane *plane, struct drm_crtc *crtc,
 277                        struct drm_framebuffer *fb, int crtc_x, int crtc_y,
 278                        unsigned int crtc_w, unsigned int crtc_h,
 279                        uint32_t src_x, uint32_t src_y,
 280                        uint32_t src_w, uint32_t src_h)
 281 {
 282         struct rcar_du_plane *rplane = to_rcar_plane(plane);
 283         struct rcar_du_device *rcdu = rplane->group->dev;
 284         const struct rcar_du_format_info *format;
 285         unsigned int nplanes;
 286         int ret;
 287
 288         format = rcar_du_format_info(fb->pixel_format);
 289         if (format == NULL) {
 290                 dev_dbg(rcdu->dev, "%s: unsupported format %08x\n", __func__,
 291                         fb->pixel_format);
 292                 return -EINVAL;
 293         }
 294
 295         if (src_w >> 16 != crtc_w || src_h >> 16 != crtc_h) {
 296                 dev_dbg(rcdu->dev, "%s: scaling not supported\n", __func__);
 297                 return -EINVAL;
 298         }
 299
 300         nplanes = rplane->format ? rplane->format->planes : 0;
 301
 302         /* Reallocate hardware planes if the number of required planes has
 303          * changed.
 304          */
 305         if (format->planes != nplanes) {
 306                 rcar_du_plane_release(rplane);
 307                 ret = rcar_du_plane_reserve(rplane, format);
 308                 if (ret < 0)
 309                         return ret;
 310         }
 311
 312         rplane->crtc = crtc;
 313         rplane->format = format;
 314
 315         rplane->src_x = src_x >> 16;
 316         rplane->src_y = src_y >> 16;
 317         rplane->dst_x = crtc_x;
 318         rplane->dst_y = crtc_y;
 319         rplane->width = crtc_w;
 320         rplane->height = crtc_h;
 321
 322         rcar_du_plane_compute_base(rplane, fb);
 323         rcar_du_plane_setup(rplane);
 324
 325         mutex_lock(&rplane->group->planes.lock);
 326         rplane->enabled = true;
 327         rcar_du_crtc_update_planes(rplane->crtc);
 328         mutex_unlock(&rplane->group->planes.lock);
 329
 330         return 0;
 331 }
 332
 333 static int rcar_du_plane_disable(struct drm_plane *plane)
 334 {
 335         struct rcar_du_plane *rplane = to_rcar_plane(plane);
 336
 337         if (!rplane->enabled)
 338                 return 0;
 339
 340         mutex_lock(&rplane->group->planes.lock);
 341         rplane->enabled = false;
 342         rcar_du_crtc_update_planes(rplane->crtc);
 343         mutex_unlock(&rplane->group->planes.lock);
 344
 345         rcar_du_plane_release(rplane);
 346
 347         rplane->crtc = NULL;
 348         rplane->format = NULL;
 349
 350         return 0;
 351 }
 352
 353 /* Both the .set_property and the .update_plane operations are called with the
 354  * mode_config lock held. There is this no need to explicitly protect access to
 355  * the alpha and colorkey fields and the mode register.
 356  */
 357 static void rcar_du_plane_set_alpha(struct rcar_du_plane *plane, u32 alpha)
 358 {
 359         if (plane->alpha == alpha)
 360                 return;
 361
 362         plane->alpha = alpha;
 363         if (!plane->enabled || plane->format->fourcc != DRM_FORMAT_XRGB1555)
 364                 return;
 365
 366         rcar_du_plane_setup_mode(plane, plane->hwindex);
 367 }
 368
 369 static void rcar_du_plane_set_colorkey(struct rcar_du_plane *plane,
 370                                        u32 colorkey)
 371 {
 372         if (plane->colorkey == colorkey)
 373                 return;
 374
 375         plane->colorkey = colorkey;
 376         if (!plane->enabled)
 377                 return;
 378
 379         rcar_du_plane_setup_mode(plane, plane->hwindex);
 380 }
 381
 382 static void rcar_du_plane_set_zpos(struct rcar_du_plane *plane,
 383                                    unsigned int zpos)
 384 {
 385         mutex_lock(&plane->group->planes.lock);
 386         if (plane->zpos == zpos)
 387                 goto done;
 388
 389         plane->zpos = zpos;
 390         if (!plane->enabled)
 391                 goto done;
 392
 393         rcar_du_crtc_update_planes(plane->crtc);
 394
 395 done:
 396         mutex_unlock(&plane->group->planes.lock);
 397 }
 398
 399 static int rcar_du_plane_set_property(struct drm_plane *plane,
 400                                       struct drm_property *property,
 401                                       uint64_t value)
 402 {
 403         struct rcar_du_plane *rplane = to_rcar_plane(plane);
 404         struct rcar_du_group *rgrp = rplane->group;
 405
 406         if (property == rgrp->planes.alpha)
 407                 rcar_du_plane_set_alpha(rplane, value);
 408         else if (property == rgrp->planes.colorkey)
 409                 rcar_du_plane_set_colorkey(rplane, value);
 410         else if (property == rgrp->planes.zpos)
 411                 rcar_du_plane_set_zpos(rplane, value);
 412         else
 413                 return -EINVAL;
 414
 415         return 0;
 416 }
 417
 418 static const struct drm_plane_funcs rcar_du_plane_funcs = {
 419         .update_plane = rcar_du_plane_update,
 420         .disable_plane = rcar_du_plane_disable,
 421         .set_property = rcar_du_plane_set_property,
 422         .destroy = drm_plane_cleanup,
 423 };
 424
 425 static const uint32_t formats[] = {
 426         DRM_FORMAT_RGB565,
 427         DRM_FORMAT_ARGB1555,
 428         DRM_FORMAT_XRGB1555,
 429         DRM_FORMAT_XRGB8888,
 430         DRM_FORMAT_ARGB8888,
 431         DRM_FORMAT_UYVY,
 432         DRM_FORMAT_YUYV,
 433         DRM_FORMAT_NV12,
 434         DRM_FORMAT_NV21,
 435         DRM_FORMAT_NV16,
 436 };
 437
 438 int rcar_du_planes_init(struct rcar_du_group *rgrp)
 439 {
 440         struct rcar_du_planes *planes = &rgrp->planes;
 441         struct rcar_du_device *rcdu = rgrp->dev;
 442         unsigned int i;
 443
 444         mutex_init(&planes->lock);
 445         planes->free = 0xff;
 446
 447         planes->alpha =
 448                 drm_property_create_range(rcdu->ddev, 0, "alpha", 0, 255);
 449         if (planes->alpha == NULL)
 450                 return -ENOMEM;
 451
 452         /* The color key is expressed as an RGB888 triplet stored in a 32-bit
 453          * integer in XRGB8888 format. Bit 24 is used as a flag to disable (0)
 454          * or enable source color keying (1).
 455          */
 456         planes->colorkey =
 457                 drm_property_create_range(rcdu->ddev, 0, "colorkey",
 458                                           0, 0x01ffffff);
 459         if (planes->colorkey == NULL)
 460                 return -ENOMEM;
 461
 462         planes->zpos =
 463                 drm_property_create_range(rcdu->ddev, 0, "zpos", 1, 7);
 464         if (planes->zpos == NULL)
 465                 return -ENOMEM;
 466
 467         for (i = 0; i < ARRAY_SIZE(planes->planes); ++i) {
 468                 struct rcar_du_plane *plane = &planes->planes[i];
 469
 470                 plane->group = rgrp;
 471                 plane->hwindex = -1;
 472                 plane->alpha = 255;
 473                 plane->colorkey = RCAR_DU_COLORKEY_NONE;
 474                 plane->zpos = 0;
 475         }
 476
 477         return 0;
 478 }
 479
 480 int rcar_du_planes_register(struct rcar_du_group *rgrp)
 481 {
 482         struct rcar_du_planes *planes = &rgrp->planes;
 483         struct rcar_du_device *rcdu = rgrp->dev;
 484         unsigned int crtcs;
 485         unsigned int i;
 486         int ret;
 487
 488         crtcs = ((1 << rcdu->num_crtcs) - 1) & (3 << (2 * rgrp->index));
 489
 490         for (i = 0; i < RCAR_DU_NUM_KMS_PLANES; ++i) {
 491                 struct rcar_du_kms_plane *plane;
 492
 493                 plane = devm_kzalloc(rcdu->dev, sizeof(*plane), GFP_KERNEL);
 494                 if (plane == NULL)
 495                         return -ENOMEM;
 496
 497                 plane->hwplane = &planes->planes[i + 2];
 498                 plane->hwplane->zpos = 1;
 499
 500                 ret = drm_plane_init(rcdu->ddev, &plane->plane, crtcs,
 501                                      &rcar_du_plane_funcs, formats,
 502                                      ARRAY_SIZE(formats), false);
 503                 if (ret < 0)
 504                         return ret;
 505
 506                 drm_object_attach_property(&plane->plane.base,
 507                                            planes->alpha, 255);
 508                 drm_object_attach_property(&plane->plane.base,
 509                                            planes->colorkey,
 510                                            RCAR_DU_COLORKEY_NONE);
 511                 drm_object_attach_property(&plane->plane.base,
 512                                            planes->zpos, 1);
 513         }
 514
 515         return 0;
 516 }