kernel/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_atomic_helper.h>
  16 #include <drm/drm_crtc.h>
  17 #include <drm/drm_crtc_helper.h>
  18 #include <drm/drm_fb_cma_helper.h>
  19 #include <drm/drm_gem_cma_helper.h>
  20 #include <drm/drm_plane_helper.h>
  21
  22 #include "rcar_du_drv.h"
  23 #include "rcar_du_kms.h"
  24 #include "rcar_du_plane.h"
  25 #include "rcar_du_regs.h"
  26
  27 #define RCAR_DU_COLORKEY_NONE           (0 << 24)
  28 #define RCAR_DU_COLORKEY_SOURCE         (1 << 24)
  29 #define RCAR_DU_COLORKEY_MASK           (1 << 24)
  30
  31 static u32 rcar_du_plane_read(struct rcar_du_group *rgrp,
  32                               unsigned int index, u32 reg)
  33 {
  34         return rcar_du_read(rgrp->dev,
  35                             rgrp->mmio_offset + index * PLANE_OFF + reg);
  36 }
  37
  38 static void rcar_du_plane_write(struct rcar_du_group *rgrp,
  39                                 unsigned int index, u32 reg, u32 data)
  40 {
  41         rcar_du_write(rgrp->dev, rgrp->mmio_offset + index * PLANE_OFF + reg,
  42                       data);
  43 }
  44
  45 static void rcar_du_plane_setup_fb(struct rcar_du_plane *plane)
  46 {
  47         struct rcar_du_plane_state *state =
  48                 to_rcar_du_plane_state(plane->plane.state);
  49         struct drm_framebuffer *fb = plane->plane.state->fb;
  50         struct rcar_du_group *rgrp = plane->group;
  51         unsigned int src_x = state->state.src_x >> 16;
  52         unsigned int src_y = state->state.src_y >> 16;
  53         unsigned int index = state->hwindex;
  54         struct drm_gem_cma_object *gem;
  55         bool interlaced;
  56         u32 mwr;
  57
  58         interlaced = state->state.crtc->state->adjusted_mode.flags
  59                    & DRM_MODE_FLAG_INTERLACE;
  60
  61         /* Memory pitch (expressed in pixels). Must be doubled for interlaced
  62          * operation with 32bpp formats.
  63          */
  64         if (state->format->planes == 2)
  65                 mwr = fb->pitches[0];
  66         else
  67                 mwr = fb->pitches[0] * 8 / state->format->bpp;
  68
  69         if (interlaced && state->format->bpp == 32)
  70                 mwr *= 2;
  71
  72         rcar_du_plane_write(rgrp, index, PnMWR, mwr);
  73
  74         /* The Y position is expressed in raster line units and must be doubled
  75          * for 32bpp formats, according to the R8A7790 datasheet. No mention of
  76          * doubling the Y position is found in the R8A7779 datasheet, but the
  77          * rule seems to apply there as well.
  78          *
  79          * Despite not being documented, doubling seem not to be needed when
  80          * operating in interlaced mode.
  81          *
  82          * Similarly, for the second plane, NV12 and NV21 formats seem to
  83          * require a halved Y position value, in both progressive and interlaced
  84          * modes.
  85          */
  86         rcar_du_plane_write(rgrp, index, PnSPXR, src_x);
  87         rcar_du_plane_write(rgrp, index, PnSPYR, src_y *
  88                             (!interlaced && state->format->bpp == 32 ? 2 : 1));
  89
  90         gem = drm_fb_cma_get_gem_obj(fb, 0);
  91         rcar_du_plane_write(rgrp, index, PnDSA0R, gem->paddr + fb->offsets[0]);
  92
  93         if (state->format->planes == 2) {
  94                 index = (index + 1) % 8;
  95
  96                 rcar_du_plane_write(rgrp, index, PnMWR, fb->pitches[0]);
  97
  98                 rcar_du_plane_write(rgrp, index, PnSPXR, src_x);
  99                 rcar_du_plane_write(rgrp, index, PnSPYR, src_y *
 100                                     (state->format->bpp == 16 ? 2 : 1) / 2);
 101
 102                 gem = drm_fb_cma_get_gem_obj(fb, 1);
 103                 rcar_du_plane_write(rgrp, index, PnDSA0R,
 104                                     gem->paddr + fb->offsets[1]);
 105         }
 106 }
 107
 108 static void rcar_du_plane_setup_mode(struct rcar_du_plane *plane,
 109                                      unsigned int index)
 110 {
 111         struct rcar_du_plane_state *state =
 112                 to_rcar_du_plane_state(plane->plane.state);
 113         struct rcar_du_group *rgrp = plane->group;
 114         u32 colorkey;
 115         u32 pnmr;
 116
 117         /* The PnALPHAR register controls alpha-blending in 16bpp formats
 118          * (ARGB1555 and XRGB1555).
 119          *
 120          * For ARGB, set the alpha value to 0, and enable alpha-blending when
 121          * the A bit is 0. This maps A=0 to alpha=0 and A=1 to alpha=255.
 122          *
 123          * For XRGB, set the alpha value to the plane-wide alpha value and
 124          * enable alpha-blending regardless of the X bit value.
 125          */
 126         if (state->format->fourcc != DRM_FORMAT_XRGB1555)
 127                 rcar_du_plane_write(rgrp, index, PnALPHAR, PnALPHAR_ABIT_0);
 128         else
 129                 rcar_du_plane_write(rgrp, index, PnALPHAR,
 130                                     PnALPHAR_ABIT_X | state->alpha);
 131
 132         pnmr = PnMR_BM_MD | state->format->pnmr;
 133
 134         /* Disable color keying when requested. YUV formats have the
 135          * PnMR_SPIM_TP_OFF bit set in their pnmr field, disabling color keying
 136          * automatically.
 137          */
 138         if ((state->colorkey & RCAR_DU_COLORKEY_MASK) == RCAR_DU_COLORKEY_NONE)
 139                 pnmr |= PnMR_SPIM_TP_OFF;
 140
 141         /* For packed YUV formats we need to select the U/V order. */
 142         if (state->format->fourcc == DRM_FORMAT_YUYV)
 143                 pnmr |= PnMR_YCDF_YUYV;
 144
 145         rcar_du_plane_write(rgrp, index, PnMR, pnmr);
 146
 147         switch (state->format->fourcc) {
 148         case DRM_FORMAT_RGB565:
 149                 colorkey = ((state->colorkey & 0xf80000) >> 8)
 150                          | ((state->colorkey & 0x00fc00) >> 5)
 151                          | ((state->colorkey & 0x0000f8) >> 3);
 152                 rcar_du_plane_write(rgrp, index, PnTC2R, colorkey);
 153                 break;
 154
 155         case DRM_FORMAT_ARGB1555:
 156         case DRM_FORMAT_XRGB1555:
 157                 colorkey = ((state->colorkey & 0xf80000) >> 9)
 158                          | ((state->colorkey & 0x00f800) >> 6)
 159                          | ((state->colorkey & 0x0000f8) >> 3);
 160                 rcar_du_plane_write(rgrp, index, PnTC2R, colorkey);
 161                 break;
 162
 163         case DRM_FORMAT_XRGB8888:
 164         case DRM_FORMAT_ARGB8888:
 165                 rcar_du_plane_write(rgrp, index, PnTC3R,
 166                                     PnTC3R_CODE | (state->colorkey & 0xffffff));
 167                 break;
 168         }
 169 }
 170
 171 static void __rcar_du_plane_setup(struct rcar_du_plane *plane,
 172                                   unsigned int index)
 173 {
 174         struct rcar_du_plane_state *state =
 175                 to_rcar_du_plane_state(plane->plane.state);
 176         struct rcar_du_group *rgrp = plane->group;
 177         u32 ddcr2 = PnDDCR2_CODE;
 178         u32 ddcr4;
 179
 180         /* Data format
 181          *
 182          * The data format is selected by the DDDF field in PnMR and the EDF
 183          * field in DDCR4.
 184          */
 185         ddcr4 = rcar_du_plane_read(rgrp, index, PnDDCR4);
 186         ddcr4 &= ~PnDDCR4_EDF_MASK;
 187         ddcr4 |= state->format->edf | PnDDCR4_CODE;
 188
 189         rcar_du_plane_setup_mode(plane, index);
 190
 191         if (state->format->planes == 2) {
 192                 if (state->hwindex != index) {
 193                         if (state->format->fourcc == DRM_FORMAT_NV12 ||
 194                             state->format->fourcc == DRM_FORMAT_NV21)
 195                                 ddcr2 |= PnDDCR2_Y420;
 196
 197                         if (state->format->fourcc == DRM_FORMAT_NV21)
 198                                 ddcr2 |= PnDDCR2_NV21;
 199
 200                         ddcr2 |= PnDDCR2_DIVU;
 201                 } else {
 202                         ddcr2 |= PnDDCR2_DIVY;
 203                 }
 204         }
 205
 206         rcar_du_plane_write(rgrp, index, PnDDCR2, ddcr2);
 207         rcar_du_plane_write(rgrp, index, PnDDCR4, ddcr4);
 208
 209         /* Destination position and size */
 210         rcar_du_plane_write(rgrp, index, PnDSXR, plane->plane.state->crtc_w);
 211         rcar_du_plane_write(rgrp, index, PnDSYR, plane->plane.state->crtc_h);
 212         rcar_du_plane_write(rgrp, index, PnDPXR, plane->plane.state->crtc_x);
 213         rcar_du_plane_write(rgrp, index, PnDPYR, plane->plane.state->crtc_y);
 214
 215         /* Wrap-around and blinking, disabled */
 216         rcar_du_plane_write(rgrp, index, PnWASPR, 0);
 217         rcar_du_plane_write(rgrp, index, PnWAMWR, 4095);
 218         rcar_du_plane_write(rgrp, index, PnBTR, 0);
 219         rcar_du_plane_write(rgrp, index, PnMLR, 0);
 220 }
 221
 222 void rcar_du_plane_setup(struct rcar_du_plane *plane)
 223 {
 224         struct rcar_du_plane_state *state =
 225                 to_rcar_du_plane_state(plane->plane.state);
 226
 227         __rcar_du_plane_setup(plane, state->hwindex);
 228         if (state->format->planes == 2)
 229                 __rcar_du_plane_setup(plane, (state->hwindex + 1) % 8);
 230
 231         rcar_du_plane_setup_fb(plane);
 232 }
 233
 234 static int rcar_du_plane_atomic_check(struct drm_plane *plane,
 235                                       struct drm_plane_state *state)
 236 {
 237         struct rcar_du_plane_state *rstate = to_rcar_du_plane_state(state);
 238         struct rcar_du_plane *rplane = to_rcar_plane(plane);
 239         struct rcar_du_device *rcdu = rplane->group->dev;
 240
 241         if (!state->fb || !state->crtc) {
 242                 rstate->format = NULL;
 243                 return 0;
 244         }
 245
 246         if (state->src_w >> 16 != state->crtc_w ||
 247             state->src_h >> 16 != state->crtc_h) {
 248                 dev_dbg(rcdu->dev, "%s: scaling not supported\n", __func__);
 249                 return -EINVAL;
 250         }
 251
 252         rstate->format = rcar_du_format_info(state->fb->pixel_format);
 253         if (rstate->format == NULL) {
 254                 dev_dbg(rcdu->dev, "%s: unsupported format %08x\n", __func__,
 255                         state->fb->pixel_format);
 256                 return -EINVAL;
 257         }
 258
 259         return 0;
 260 }
 261
 262 static void rcar_du_plane_atomic_update(struct drm_plane *plane,
 263                                         struct drm_plane_state *old_state)
 264 {
 265         struct rcar_du_plane *rplane = to_rcar_plane(plane);
 266
 267         if (plane->state->crtc)
 268                 rcar_du_plane_setup(rplane);
 269 }
 270
 271 static const struct drm_plane_helper_funcs rcar_du_plane_helper_funcs = {
 272         .atomic_check = rcar_du_plane_atomic_check,
 273         .atomic_update = rcar_du_plane_atomic_update,
 274 };
 275
 276 static void rcar_du_plane_reset(struct drm_plane *plane)
 277 {
 278         struct rcar_du_plane_state *state;
 279
 280         if (plane->state && plane->state->fb)
 281                 drm_framebuffer_unreference(plane->state->fb);
 282
 283         kfree(plane->state);
 284         plane->state = NULL;
 285
 286         state = kzalloc(sizeof(*state), GFP_KERNEL);
 287         if (state == NULL)
 288                 return;
 289
 290         state->hwindex = -1;
 291         state->alpha = 255;
 292         state->colorkey = RCAR_DU_COLORKEY_NONE;
 293         state->zpos = plane->type == DRM_PLANE_TYPE_PRIMARY ? 0 : 1;
 294
 295         plane->state = &state->state;
 296         plane->state->plane = plane;
 297 }
 298
 299 static struct drm_plane_state *
 300 rcar_du_plane_atomic_duplicate_state(struct drm_plane *plane)
 301 {
 302         struct rcar_du_plane_state *state;
 303         struct rcar_du_plane_state *copy;
 304
 305         state = to_rcar_du_plane_state(plane->state);
 306         copy = kmemdup(state, sizeof(*state), GFP_KERNEL);
 307         if (copy == NULL)
 308                 return NULL;
 309
 310         if (copy->state.fb)
 311                 drm_framebuffer_reference(copy->state.fb);
 312
 313         return &copy->state;
 314 }
 315
 316 static void rcar_du_plane_atomic_destroy_state(struct drm_plane *plane,
 317                                                struct drm_plane_state *state)
 318 {
 319         if (state->fb)
 320                 drm_framebuffer_unreference(state->fb);
 321
 322         kfree(to_rcar_du_plane_state(state));
 323 }
 324
 325 static int rcar_du_plane_atomic_set_property(struct drm_plane *plane,
 326                                              struct drm_plane_state *state,
 327                                              struct drm_property *property,
 328                                              uint64_t val)
 329 {
 330         struct rcar_du_plane_state *rstate = to_rcar_du_plane_state(state);
 331         struct rcar_du_plane *rplane = to_rcar_plane(plane);
 332         struct rcar_du_group *rgrp = rplane->group;
 333
 334         if (property == rgrp->planes.alpha)
 335                 rstate->alpha = val;
 336         else if (property == rgrp->planes.colorkey)
 337                 rstate->colorkey = val;
 338         else if (property == rgrp->planes.zpos)
 339                 rstate->zpos = val;
 340         else
 341                 return -EINVAL;
 342
 343         return 0;
 344 }
 345
 346 static int rcar_du_plane_atomic_get_property(struct drm_plane *plane,
 347         const struct drm_plane_state *state, struct drm_property *property,
 348         uint64_t *val)
 349 {
 350         const struct rcar_du_plane_state *rstate =
 351                 container_of(state, const struct rcar_du_plane_state, state);
 352         struct rcar_du_plane *rplane = to_rcar_plane(plane);
 353         struct rcar_du_group *rgrp = rplane->group;
 354
 355         if (property == rgrp->planes.alpha)
 356                 *val = rstate->alpha;
 357         else if (property == rgrp->planes.colorkey)
 358                 *val = rstate->colorkey;
 359         else if (property == rgrp->planes.zpos)
 360                 *val = rstate->zpos;
 361         else
 362                 return -EINVAL;
 363
 364         return 0;
 365 }
 366
 367 static const struct drm_plane_funcs rcar_du_plane_funcs = {
 368         .update_plane = drm_atomic_helper_update_plane,
 369         .disable_plane = drm_atomic_helper_disable_plane,
 370         .reset = rcar_du_plane_reset,
 371         .set_property = drm_atomic_helper_plane_set_property,
 372         .destroy = drm_plane_cleanup,
 373         .atomic_duplicate_state = rcar_du_plane_atomic_duplicate_state,
 374         .atomic_destroy_state = rcar_du_plane_atomic_destroy_state,
 375         .atomic_set_property = rcar_du_plane_atomic_set_property,
 376         .atomic_get_property = rcar_du_plane_atomic_get_property,
 377 };
 378
 379 static const uint32_t formats[] = {
 380         DRM_FORMAT_RGB565,
 381         DRM_FORMAT_ARGB1555,
 382         DRM_FORMAT_XRGB1555,
 383         DRM_FORMAT_XRGB8888,
 384         DRM_FORMAT_ARGB8888,
 385         DRM_FORMAT_UYVY,
 386         DRM_FORMAT_YUYV,
 387         DRM_FORMAT_NV12,
 388         DRM_FORMAT_NV21,
 389         DRM_FORMAT_NV16,
 390 };
 391
 392 int rcar_du_planes_init(struct rcar_du_group *rgrp)
 393 {
 394         struct rcar_du_planes *planes = &rgrp->planes;
 395         struct rcar_du_device *rcdu = rgrp->dev;
 396         unsigned int num_planes;
 397         unsigned int num_crtcs;
 398         unsigned int crtcs;
 399         unsigned int i;
 400         int ret;
 401
 402         planes->alpha =
 403                 drm_property_create_range(rcdu->ddev, 0, "alpha", 0, 255);
 404         if (planes->alpha == NULL)
 405                 return -ENOMEM;
 406
 407         /* The color key is expressed as an RGB888 triplet stored in a 32-bit
 408          * integer in XRGB8888 format. Bit 24 is used as a flag to disable (0)
 409          * or enable source color keying (1).
 410          */
 411         planes->colorkey =
 412                 drm_property_create_range(rcdu->ddev, 0, "colorkey",
 413                                           0, 0x01ffffff);
 414         if (planes->colorkey == NULL)
 415                 return -ENOMEM;
 416
 417         planes->zpos =
 418                 drm_property_create_range(rcdu->ddev, 0, "zpos", 1, 7);
 419         if (planes->zpos == NULL)
 420                 return -ENOMEM;
 421
 422          /* Create one primary plane per in this group CRTC and seven overlay
 423           * planes.
 424           */
 425         num_crtcs = min(rcdu->num_crtcs - 2 * rgrp->index, 2U);
 426         num_planes = num_crtcs + 7;
 427
 428         crtcs = ((1 << rcdu->num_crtcs) - 1) & (3 << (2 * rgrp->index));
 429
 430         for (i = 0; i < num_planes; ++i) {
 431                 enum drm_plane_type type = i < num_crtcs
 432                                          ? DRM_PLANE_TYPE_PRIMARY
 433                                          : DRM_PLANE_TYPE_OVERLAY;
 434                 struct rcar_du_plane *plane = &planes->planes[i];
 435
 436                 plane->group = rgrp;
 437
 438                 ret = drm_universal_plane_init(rcdu->ddev, &plane->plane, crtcs,
 439                                                &rcar_du_plane_funcs, formats,
 440                                                ARRAY_SIZE(formats), type);
 441                 if (ret < 0)
 442                         return ret;
 443
 444                 drm_plane_helper_add(&plane->plane,
 445                                      &rcar_du_plane_helper_funcs);
 446
 447                 if (type == DRM_PLANE_TYPE_PRIMARY)
 448                         continue;
 449
 450                 drm_object_attach_property(&plane->plane.base,
 451                                            planes->alpha, 255);
 452                 drm_object_attach_property(&plane->plane.base,
 453                                            planes->colorkey,
 454                                            RCAR_DU_COLORKEY_NONE);
 455                 drm_object_attach_property(&plane->plane.base,
 456                                            planes->zpos, 1);
 457         }
 458
 459         return 0;
 460 }