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         if ((plane->interlace_flag) && (plane->format->bpp == 32))
 116                 rcar_du_plane_write(rgrp, index, PnMWR, mwr * 2);
 117         else
 118                 rcar_du_plane_write(rgrp, index, PnMWR, mwr);
 119
 120         /* The Y position is expressed in raster line units and must be doubled
 121          * for 32bpp formats, according to the R8A7790 datasheet. No mention of
 122          * doubling the Y position is found in the R8A7779 datasheet, but the
 123          * rule seems to apply there as well.
 124          *
 125          * Similarly, for the second plane, NV12 and NV21 formats seem to
 126          * require a halved Y position value.
 127          */
 128         rcar_du_plane_write(rgrp, index, PnSPXR, plane->src_x);
 129         if ((!plane->interlace_flag) && (plane->format->bpp == 32))
 130                 rcar_du_plane_write(rgrp, index, PnSPYR, plane->src_y * 2);
 131         else
 132                 rcar_du_plane_write(rgrp, index, PnSPYR, plane->src_y);
 133         rcar_du_plane_write(rgrp, index, PnDSA0R, plane->dma[0]);
 134
 135         if (plane->format->planes == 2) {
 136                 index = (index + 1) % 8;
 137
 138                 rcar_du_plane_write(rgrp, index, PnSPXR, plane->src_x);
 139                 rcar_du_plane_write(rgrp, index, PnSPYR, plane->src_y *
 140                                     (plane->format->bpp == 16 ? 2 : 1) / 2);
 141                 rcar_du_plane_write(rgrp, index, PnDSA0R, plane->dma[1]);
 142         }
 143 }
 144
 145 void rcar_du_plane_compute_base(struct rcar_du_plane *plane,
 146                                 struct drm_framebuffer *fb)
 147 {
 148         struct drm_gem_cma_object *gem;
 149
 150         plane->pitch = fb->pitches[0];
 151
 152         gem = drm_fb_cma_get_gem_obj(fb, 0);
 153         plane->dma[0] = gem->paddr + fb->offsets[0];
 154
 155         if (plane->format->planes == 2) {
 156                 gem = drm_fb_cma_get_gem_obj(fb, 1);
 157                 plane->dma[1] = gem->paddr + fb->offsets[1];
 158         }
 159 }
 160
 161 static void rcar_du_plane_setup_mode(struct rcar_du_plane *plane,
 162                                      unsigned int index)
 163 {
 164         struct rcar_du_group *rgrp = plane->group;
 165         u32 colorkey;
 166         u32 pnmr;
 167
 168         /* The PnALPHAR register controls alpha-blending in 16bpp formats
 169          * (ARGB1555 and XRGB1555).
 170          *
 171          * For ARGB, set the alpha value to 0, and enable alpha-blending when
 172          * the A bit is 0. This maps A=0 to alpha=0 and A=1 to alpha=255.
 173          *
 174          * For XRGB, set the alpha value to the plane-wide alpha value and
 175          * enable alpha-blending regardless of the X bit value.
 176          */
 177         if (plane->format->fourcc != DRM_FORMAT_XRGB1555)
 178                 rcar_du_plane_write(rgrp, index, PnALPHAR, PnALPHAR_ABIT_0);
 179         else
 180                 rcar_du_plane_write(rgrp, index, PnALPHAR,
 181                                     PnALPHAR_ABIT_X | plane->alpha);
 182
 183         pnmr = PnMR_BM_MD | plane->format->pnmr;
 184
 185         /* Disable color keying when requested. YUV formats have the
 186          * PnMR_SPIM_TP_OFF bit set in their pnmr field, disabling color keying
 187          * automatically.
 188          */
 189         if ((plane->colorkey & RCAR_DU_COLORKEY_MASK) == RCAR_DU_COLORKEY_NONE)
 190                 pnmr |= PnMR_SPIM_TP_OFF;
 191
 192         /* For packed YUV formats we need to select the U/V order. */
 193         if (plane->format->fourcc == DRM_FORMAT_YUYV)
 194                 pnmr |= PnMR_YCDF_YUYV;
 195
 196         rcar_du_plane_write(rgrp, index, PnMR, pnmr);
 197
 198         switch (plane->format->fourcc) {
 199         case DRM_FORMAT_RGB565:
 200                 colorkey = ((plane->colorkey & 0xf80000) >> 8)
 201                          | ((plane->colorkey & 0x00fc00) >> 5)
 202                          | ((plane->colorkey & 0x0000f8) >> 3);
 203                 rcar_du_plane_write(rgrp, index, PnTC2R, colorkey);
 204                 break;
 205
 206         case DRM_FORMAT_ARGB1555:
 207         case DRM_FORMAT_XRGB1555:
 208                 colorkey = ((plane->colorkey & 0xf80000) >> 9)
 209                          | ((plane->colorkey & 0x00f800) >> 6)
 210                          | ((plane->colorkey & 0x0000f8) >> 3);
 211                 rcar_du_plane_write(rgrp, index, PnTC2R, colorkey);
 212                 break;
 213
 214         case DRM_FORMAT_XRGB8888:
 215         case DRM_FORMAT_ARGB8888:
 216                 rcar_du_plane_write(rgrp, index, PnTC3R,
 217                                     PnTC3R_CODE | (plane->colorkey & 0xffffff));
 218                 break;
 219         }
 220 }
 221
 222 static void __rcar_du_plane_setup(struct rcar_du_plane *plane,
 223                                   unsigned int index)
 224 {
 225         struct rcar_du_group *rgrp = plane->group;
 226         u32 ddcr2 = PnDDCR2_CODE;
 227         u32 ddcr4;
 228
 229         /* Data format
 230          *
 231          * The data format is selected by the DDDF field in PnMR and the EDF
 232          * field in DDCR4.
 233          */
 234         ddcr4 = rcar_du_plane_read(rgrp, index, PnDDCR4);
 235         ddcr4 &= ~PnDDCR4_EDF_MASK;
 236         ddcr4 |= plane->format->edf | PnDDCR4_CODE;
 237
 238         rcar_du_plane_setup_mode(plane, index);
 239
 240         if (plane->format->planes == 2) {
 241                 if (plane->hwindex != index) {
 242                         if (plane->format->fourcc == DRM_FORMAT_NV12 ||
 243                             plane->format->fourcc == DRM_FORMAT_NV21)
 244                                 ddcr2 |= PnDDCR2_Y420;
 245
 246                         if (plane->format->fourcc == DRM_FORMAT_NV21)
 247                                 ddcr2 |= PnDDCR2_NV21;
 248
 249                         ddcr2 |= PnDDCR2_DIVU;
 250                 } else {
 251                         ddcr2 |= PnDDCR2_DIVY;
 252                 }
 253         }
 254
 255         rcar_du_plane_write(rgrp, index, PnDDCR2, ddcr2);
 256         rcar_du_plane_write(rgrp, index, PnDDCR4, ddcr4);
 257
 258         /* Destination position and size */
 259         rcar_du_plane_write(rgrp, index, PnDSXR, plane->width);
 260         rcar_du_plane_write(rgrp, index, PnDSYR, plane->height);
 261         rcar_du_plane_write(rgrp, index, PnDPXR, plane->dst_x);
 262         rcar_du_plane_write(rgrp, index, PnDPYR, plane->dst_y);
 263
 264         /* Wrap-around and blinking, disabled */
 265         rcar_du_plane_write(rgrp, index, PnWASPR, 0);
 266         rcar_du_plane_write(rgrp, index, PnWAMWR, 4095);
 267         rcar_du_plane_write(rgrp, index, PnBTR, 0);
 268         rcar_du_plane_write(rgrp, index, PnMLR, 0);
 269 }
 270
 271 void rcar_du_plane_setup(struct rcar_du_plane *plane)
 272 {
 273         __rcar_du_plane_setup(plane, plane->hwindex);
 274         if (plane->format->planes == 2)
 275                 __rcar_du_plane_setup(plane, (plane->hwindex + 1) % 8);
 276
 277         rcar_du_plane_update_base(plane);
 278 }
 279
 280 static int
 281 rcar_du_plane_update(struct drm_plane *plane, struct drm_crtc *crtc,
 282                        struct drm_framebuffer *fb, int crtc_x, int crtc_y,
 283                        unsigned int crtc_w, unsigned int crtc_h,
 284                        uint32_t src_x, uint32_t src_y,
 285                        uint32_t src_w, uint32_t src_h)
 286 {
 287         struct rcar_du_plane *rplane = to_rcar_plane(plane);
 288         struct rcar_du_device *rcdu = rplane->group->dev;
 289         const struct rcar_du_format_info *format;
 290         unsigned int nplanes;
 291         int ret;
 292
 293         format = rcar_du_format_info(fb->pixel_format);
 294         if (format == NULL) {
 295                 dev_dbg(rcdu->dev, "%s: unsupported format %08x\n", __func__,
 296                         fb->pixel_format);
 297                 return -EINVAL;
 298         }
 299
 300         if (src_w >> 16 != crtc_w || src_h >> 16 != crtc_h) {
 301                 dev_dbg(rcdu->dev, "%s: scaling not supported\n", __func__);
 302                 return -EINVAL;
 303         }
 304
 305         nplanes = rplane->format ? rplane->format->planes : 0;
 306
 307         /* Reallocate hardware planes if the number of required planes has
 308          * changed.
 309          */
 310         if (format->planes != nplanes) {
 311                 rcar_du_plane_release(rplane);
 312                 ret = rcar_du_plane_reserve(rplane, format);
 313                 if (ret < 0)
 314                         return ret;
 315         }
 316
 317         rplane->crtc = crtc;
 318         rplane->format = format;
 319
 320         rplane->src_x = src_x >> 16;
 321         rplane->src_y = src_y >> 16;
 322         rplane->dst_x = crtc_x;
 323         rplane->dst_y = crtc_y;
 324         rplane->width = crtc_w;
 325         rplane->height = crtc_h;
 326
 327         rcar_du_plane_compute_base(rplane, fb);
 328
 329         if (crtc->mode.flags & DRM_MODE_FLAG_INTERLACE)
 330                 rplane->interlace_flag = true;
 331         else
 332                 rplane->interlace_flag = false;
 333         rcar_du_plane_setup(rplane);
 334
 335         mutex_lock(&rplane->group->planes.lock);
 336         rplane->enabled = true;
 337         rcar_du_crtc_update_planes(rplane->crtc);
 338         mutex_unlock(&rplane->group->planes.lock);
 339
 340         return 0;
 341 }
 342
 343 static int rcar_du_plane_disable(struct drm_plane *plane)
 344 {
 345         struct rcar_du_plane *rplane = to_rcar_plane(plane);
 346
 347         if (!rplane->enabled)
 348                 return 0;
 349
 350         mutex_lock(&rplane->group->planes.lock);
 351         rplane->enabled = false;
 352         rcar_du_crtc_update_planes(rplane->crtc);
 353         mutex_unlock(&rplane->group->planes.lock);
 354
 355         rcar_du_plane_release(rplane);
 356
 357         rplane->crtc = NULL;
 358         rplane->format = NULL;
 359
 360         return 0;
 361 }
 362
 363 /* Both the .set_property and the .update_plane operations are called with the
 364  * mode_config lock held. There is this no need to explicitly protect access to
 365  * the alpha and colorkey fields and the mode register.
 366  */
 367 static void rcar_du_plane_set_alpha(struct rcar_du_plane *plane, u32 alpha)
 368 {
 369         if (plane->alpha == alpha)
 370                 return;
 371
 372         plane->alpha = alpha;
 373         if (!plane->enabled || plane->format->fourcc != DRM_FORMAT_XRGB1555)
 374                 return;
 375
 376         rcar_du_plane_setup_mode(plane, plane->hwindex);
 377 }
 378
 379 static void rcar_du_plane_set_colorkey(struct rcar_du_plane *plane,
 380                                        u32 colorkey)
 381 {
 382         if (plane->colorkey == colorkey)
 383                 return;
 384
 385         plane->colorkey = colorkey;
 386         if (!plane->enabled)
 387                 return;
 388
 389         rcar_du_plane_setup_mode(plane, plane->hwindex);
 390 }
 391
 392 static void rcar_du_plane_set_zpos(struct rcar_du_plane *plane,
 393                                    unsigned int zpos)
 394 {
 395         mutex_lock(&plane->group->planes.lock);
 396         if (plane->zpos == zpos)
 397                 goto done;
 398
 399         plane->zpos = zpos;
 400         if (!plane->enabled)
 401                 goto done;
 402
 403         rcar_du_crtc_update_planes(plane->crtc);
 404
 405 done:
 406         mutex_unlock(&plane->group->planes.lock);
 407 }
 408
 409 static int rcar_du_plane_set_property(struct drm_plane *plane,
 410                                       struct drm_property *property,
 411                                       uint64_t value)
 412 {
 413         struct rcar_du_plane *rplane = to_rcar_plane(plane);
 414         struct rcar_du_group *rgrp = rplane->group;
 415
 416         if (property == rgrp->planes.alpha)
 417                 rcar_du_plane_set_alpha(rplane, value);
 418         else if (property == rgrp->planes.colorkey)
 419                 rcar_du_plane_set_colorkey(rplane, value);
 420         else if (property == rgrp->planes.zpos)
 421                 rcar_du_plane_set_zpos(rplane, value);
 422         else
 423                 return -EINVAL;
 424
 425         return 0;
 426 }
 427
 428 static const struct drm_plane_funcs rcar_du_plane_funcs = {
 429         .update_plane = rcar_du_plane_update,
 430         .disable_plane = rcar_du_plane_disable,
 431         .set_property = rcar_du_plane_set_property,
 432         .destroy = drm_plane_cleanup,
 433 };
 434
 435 static const uint32_t formats[] = {
 436         DRM_FORMAT_RGB565,
 437         DRM_FORMAT_ARGB1555,
 438         DRM_FORMAT_XRGB1555,
 439         DRM_FORMAT_XRGB8888,
 440         DRM_FORMAT_ARGB8888,
 441         DRM_FORMAT_UYVY,
 442         DRM_FORMAT_YUYV,
 443         DRM_FORMAT_NV12,
 444         DRM_FORMAT_NV21,
 445         DRM_FORMAT_NV16,
 446 };
 447
 448 int rcar_du_planes_init(struct rcar_du_group *rgrp)
 449 {
 450         struct rcar_du_planes *planes = &rgrp->planes;
 451         struct rcar_du_device *rcdu = rgrp->dev;
 452         unsigned int i;
 453
 454         mutex_init(&planes->lock);
 455         planes->free = 0xff;
 456
 457         planes->alpha =
 458                 drm_property_create_range(rcdu->ddev, 0, "alpha", 0, 255);
 459         if (planes->alpha == NULL)
 460                 return -ENOMEM;
 461
 462         /* The color key is expressed as an RGB888 triplet stored in a 32-bit
 463          * integer in XRGB8888 format. Bit 24 is used as a flag to disable (0)
 464          * or enable source color keying (1).
 465          */
 466         planes->colorkey =
 467                 drm_property_create_range(rcdu->ddev, 0, "colorkey",
 468                                           0, 0x01ffffff);
 469         if (planes->colorkey == NULL)
 470                 return -ENOMEM;
 471
 472         planes->zpos =
 473                 drm_property_create_range(rcdu->ddev, 0, "zpos", 1, 7);
 474         if (planes->zpos == NULL)
 475                 return -ENOMEM;
 476
 477         for (i = 0; i < ARRAY_SIZE(planes->planes); ++i) {
 478                 struct rcar_du_plane *plane = &planes->planes[i];
 479
 480                 plane->group = rgrp;
 481                 plane->hwindex = -1;
 482                 plane->alpha = 255;
 483                 plane->colorkey = RCAR_DU_COLORKEY_NONE;
 484                 plane->zpos = 0;
 485         }
 486
 487         return 0;
 488 }
 489
 490 int rcar_du_planes_register(struct rcar_du_group *rgrp)
 491 {
 492         struct rcar_du_planes *planes = &rgrp->planes;
 493         struct rcar_du_device *rcdu = rgrp->dev;
 494         unsigned int crtcs;
 495         unsigned int i;
 496         int ret;
 497
 498         crtcs = ((1 << rcdu->num_crtcs) - 1) & (3 << (2 * rgrp->index));
 499
 500         for (i = 0; i < RCAR_DU_NUM_KMS_PLANES; ++i) {
 501                 struct rcar_du_kms_plane *plane;
 502
 503                 plane = devm_kzalloc(rcdu->dev, sizeof(*plane), GFP_KERNEL);
 504                 if (plane == NULL)
 505                         return -ENOMEM;
 506
 507                 plane->hwplane = &planes->planes[i + 2];
 508                 plane->hwplane->zpos = 1;
 509                 plane->hwplane->interlace_flag = false;
 510
 511                 ret = drm_plane_init(rcdu->ddev, &plane->plane, crtcs,
 512                                      &rcar_du_plane_funcs, formats,
 513                                      ARRAY_SIZE(formats), false);
 514                 if (ret < 0)
 515                         return ret;
 516
 517                 drm_object_attach_property(&plane->plane.base,
 518                                            planes->alpha, 255);
 519                 drm_object_attach_property(&plane->plane.base,
 520                                            planes->colorkey,
 521                                            RCAR_DU_COLORKEY_NONE);
 522                 drm_object_attach_property(&plane->plane.base,
 523                                            planes->zpos, 1);
 524         }
 525
 526         return 0;
 527 }