drivers/gpu/drm/vc4/vc4_plane.c

   1 /*
   2  * Copyright (C) 2015 Broadcom
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8
   9 /**
  10  * DOC: VC4 plane module
  11  *
  12  * Each DRM plane is a layer of pixels being scanned out by the HVS.
  13  *
  14  * At atomic modeset check time, we compute the HVS display element
  15  * state that would be necessary for displaying the plane (giving us a
  16  * chance to figure out if a plane configuration is invalid), then at
  17  * atomic flush time the CRTC will ask us to write our element state
  18  * into the region of the HVS that it has allocated for us.
  19  */
  20
  21 #include <drm/drm_atomic.h>
  22 #include <drm/drm_atomic_helper.h>
  23 #include <drm/drm_fb_cma_helper.h>
  24 #include <drm/drm_plane_helper.h>
  25 #include <drm/drm_atomic_uapi.h>
  26
  27 #include "uapi/drm/vc4_drm.h"
  28 #include "vc4_drv.h"
  29 #include "vc4_regs.h"
  30
  31 static const struct hvs_format {
  32         u32 drm; /* DRM_FORMAT_* */
  33         u32 hvs; /* HVS_FORMAT_* */
  34         u32 pixel_order;
  35 } hvs_formats[] = {
  36         {
  37                 .drm = DRM_FORMAT_XRGB8888, .hvs = HVS_PIXEL_FORMAT_RGBA8888,
  38                 .pixel_order = HVS_PIXEL_ORDER_ABGR,
  39         },
  40         {
  41                 .drm = DRM_FORMAT_ARGB8888, .hvs = HVS_PIXEL_FORMAT_RGBA8888,
  42                 .pixel_order = HVS_PIXEL_ORDER_ABGR,
  43         },
  44         {
  45                 .drm = DRM_FORMAT_ABGR8888, .hvs = HVS_PIXEL_FORMAT_RGBA8888,
  46                 .pixel_order = HVS_PIXEL_ORDER_ARGB,
  47         },
  48         {
  49                 .drm = DRM_FORMAT_XBGR8888, .hvs = HVS_PIXEL_FORMAT_RGBA8888,
  50                 .pixel_order = HVS_PIXEL_ORDER_ARGB,
  51         },
  52         {
  53                 .drm = DRM_FORMAT_RGB565, .hvs = HVS_PIXEL_FORMAT_RGB565,
  54                 .pixel_order = HVS_PIXEL_ORDER_XRGB,
  55         },
  56         {
  57                 .drm = DRM_FORMAT_BGR565, .hvs = HVS_PIXEL_FORMAT_RGB565,
  58                 .pixel_order = HVS_PIXEL_ORDER_XBGR,
  59         },
  60         {
  61                 .drm = DRM_FORMAT_ARGB1555, .hvs = HVS_PIXEL_FORMAT_RGBA5551,
  62                 .pixel_order = HVS_PIXEL_ORDER_ABGR,
  63         },
  64         {
  65                 .drm = DRM_FORMAT_XRGB1555, .hvs = HVS_PIXEL_FORMAT_RGBA5551,
  66                 .pixel_order = HVS_PIXEL_ORDER_ABGR,
  67         },
  68         {
  69                 .drm = DRM_FORMAT_RGB888, .hvs = HVS_PIXEL_FORMAT_RGB888,
  70                 .pixel_order = HVS_PIXEL_ORDER_XRGB,
  71         },
  72         {
  73                 .drm = DRM_FORMAT_BGR888, .hvs = HVS_PIXEL_FORMAT_RGB888,
  74                 .pixel_order = HVS_PIXEL_ORDER_XBGR,
  75         },
  76         {
  77                 .drm = DRM_FORMAT_YUV422,
  78                 .hvs = HVS_PIXEL_FORMAT_YCBCR_YUV422_3PLANE,
  79                 .pixel_order = HVS_PIXEL_ORDER_XYCBCR,
  80         },
  81         {
  82                 .drm = DRM_FORMAT_YVU422,
  83                 .hvs = HVS_PIXEL_FORMAT_YCBCR_YUV422_3PLANE,
  84                 .pixel_order = HVS_PIXEL_ORDER_XYCRCB,
  85         },
  86         {
  87                 .drm = DRM_FORMAT_YUV420,
  88                 .hvs = HVS_PIXEL_FORMAT_YCBCR_YUV420_3PLANE,
  89                 .pixel_order = HVS_PIXEL_ORDER_XYCBCR,
  90         },
  91         {
  92                 .drm = DRM_FORMAT_YVU420,
  93                 .hvs = HVS_PIXEL_FORMAT_YCBCR_YUV420_3PLANE,
  94                 .pixel_order = HVS_PIXEL_ORDER_XYCRCB,
  95         },
  96         {
  97                 .drm = DRM_FORMAT_NV12,
  98                 .hvs = HVS_PIXEL_FORMAT_YCBCR_YUV420_2PLANE,
  99                 .pixel_order = HVS_PIXEL_ORDER_XYCBCR,
 100         },
 101         {
 102                 .drm = DRM_FORMAT_NV21,
 103                 .hvs = HVS_PIXEL_FORMAT_YCBCR_YUV420_2PLANE,
 104                 .pixel_order = HVS_PIXEL_ORDER_XYCRCB,
 105         },
 106         {
 107                 .drm = DRM_FORMAT_NV16,
 108                 .hvs = HVS_PIXEL_FORMAT_YCBCR_YUV422_2PLANE,
 109                 .pixel_order = HVS_PIXEL_ORDER_XYCBCR,
 110         },
 111         {
 112                 .drm = DRM_FORMAT_NV61,
 113                 .hvs = HVS_PIXEL_FORMAT_YCBCR_YUV422_2PLANE,
 114                 .pixel_order = HVS_PIXEL_ORDER_XYCRCB,
 115         },
 116 };
 117
 118 static const struct hvs_format *vc4_get_hvs_format(u32 drm_format)
 119 {
 120         unsigned i;
 121
 122         for (i = 0; i < ARRAY_SIZE(hvs_formats); i++) {
 123                 if (hvs_formats[i].drm == drm_format)
 124                         return &hvs_formats[i];
 125         }
 126
 127         return NULL;
 128 }
 129
 130 static enum vc4_scaling_mode vc4_get_scaling_mode(u32 src, u32 dst)
 131 {
 132         if (dst > src)
 133                 return VC4_SCALING_PPF;
 134         else if (dst < src)
 135                 return VC4_SCALING_TPZ;
 136         else
 137                 return VC4_SCALING_NONE;
 138 }
 139
 140 static bool plane_enabled(struct drm_plane_state *state)
 141 {
 142         return state->fb && state->crtc;
 143 }
 144
 145 static struct drm_plane_state *vc4_plane_duplicate_state(struct drm_plane *plane)
 146 {
 147         struct vc4_plane_state *vc4_state;
 148
 149         if (WARN_ON(!plane->state))
 150                 return NULL;
 151
 152         vc4_state = kmemdup(plane->state, sizeof(*vc4_state), GFP_KERNEL);
 153         if (!vc4_state)
 154                 return NULL;
 155
 156         memset(&vc4_state->lbm, 0, sizeof(vc4_state->lbm));
 157
 158         __drm_atomic_helper_plane_duplicate_state(plane, &vc4_state->base);
 159
 160         if (vc4_state->dlist) {
 161                 vc4_state->dlist = kmemdup(vc4_state->dlist,
 162                                            vc4_state->dlist_count * 4,
 163                                            GFP_KERNEL);
 164                 if (!vc4_state->dlist) {
 165                         kfree(vc4_state);
 166                         return NULL;
 167                 }
 168                 vc4_state->dlist_size = vc4_state->dlist_count;
 169         }
 170
 171         return &vc4_state->base;
 172 }
 173
 174 static void vc4_plane_destroy_state(struct drm_plane *plane,
 175                                     struct drm_plane_state *state)
 176 {
 177         struct vc4_dev *vc4 = to_vc4_dev(plane->dev);
 178         struct vc4_plane_state *vc4_state = to_vc4_plane_state(state);
 179
 180         if (vc4_state->lbm.allocated) {
 181                 unsigned long irqflags;
 182
 183                 spin_lock_irqsave(&vc4->hvs->mm_lock, irqflags);
 184                 drm_mm_remove_node(&vc4_state->lbm);
 185                 spin_unlock_irqrestore(&vc4->hvs->mm_lock, irqflags);
 186         }
 187
 188         kfree(vc4_state->dlist);
 189         __drm_atomic_helper_plane_destroy_state(&vc4_state->base);
 190         kfree(state);
 191 }
 192
 193 /* Called during init to allocate the plane's atomic state. */
 194 static void vc4_plane_reset(struct drm_plane *plane)
 195 {
 196         struct vc4_plane_state *vc4_state;
 197
 198         WARN_ON(plane->state);
 199
 200         vc4_state = kzalloc(sizeof(*vc4_state), GFP_KERNEL);
 201         if (!vc4_state)
 202                 return;
 203
 204         __drm_atomic_helper_plane_reset(plane, &vc4_state->base);
 205 }
 206
 207 static void vc4_dlist_write(struct vc4_plane_state *vc4_state, u32 val)
 208 {
 209         if (vc4_state->dlist_count == vc4_state->dlist_size) {
 210                 u32 new_size = max(4u, vc4_state->dlist_count * 2);
 211                 u32 *new_dlist = kmalloc_array(new_size, 4, GFP_KERNEL);
 212
 213                 if (!new_dlist)
 214                         return;
 215                 memcpy(new_dlist, vc4_state->dlist, vc4_state->dlist_count * 4);
 216
 217                 kfree(vc4_state->dlist);
 218                 vc4_state->dlist = new_dlist;
 219                 vc4_state->dlist_size = new_size;
 220         }
 221
 222         vc4_state->dlist[vc4_state->dlist_count++] = val;
 223 }
 224
 225 /* Returns the scl0/scl1 field based on whether the dimensions need to
 226  * be up/down/non-scaled.
 227  *
 228  * This is a replication of a table from the spec.
 229  */
 230 static u32 vc4_get_scl_field(struct drm_plane_state *state, int plane)
 231 {
 232         struct vc4_plane_state *vc4_state = to_vc4_plane_state(state);
 233
 234         switch (vc4_state->x_scaling[plane] << 2 | vc4_state->y_scaling[plane]) {
 235         case VC4_SCALING_PPF << 2 | VC4_SCALING_PPF:
 236                 return SCALER_CTL0_SCL_H_PPF_V_PPF;
 237         case VC4_SCALING_TPZ << 2 | VC4_SCALING_PPF:
 238                 return SCALER_CTL0_SCL_H_TPZ_V_PPF;
 239         case VC4_SCALING_PPF << 2 | VC4_SCALING_TPZ:
 240                 return SCALER_CTL0_SCL_H_PPF_V_TPZ;
 241         case VC4_SCALING_TPZ << 2 | VC4_SCALING_TPZ:
 242                 return SCALER_CTL0_SCL_H_TPZ_V_TPZ;
 243         case VC4_SCALING_PPF << 2 | VC4_SCALING_NONE:
 244                 return SCALER_CTL0_SCL_H_PPF_V_NONE;
 245         case VC4_SCALING_NONE << 2 | VC4_SCALING_PPF:
 246                 return SCALER_CTL0_SCL_H_NONE_V_PPF;
 247         case VC4_SCALING_NONE << 2 | VC4_SCALING_TPZ:
 248                 return SCALER_CTL0_SCL_H_NONE_V_TPZ;
 249         case VC4_SCALING_TPZ << 2 | VC4_SCALING_NONE:
 250                 return SCALER_CTL0_SCL_H_TPZ_V_NONE;
 251         default:
 252         case VC4_SCALING_NONE << 2 | VC4_SCALING_NONE:
 253                 /* The unity case is independently handled by
 254                  * SCALER_CTL0_UNITY.
 255                  */
 256                 return 0;
 257         }
 258 }
 259
 260 static int vc4_plane_setup_clipping_and_scaling(struct drm_plane_state *state)
 261 {
 262         struct drm_plane *plane = state->plane;
 263         struct vc4_plane_state *vc4_state = to_vc4_plane_state(state);
 264         struct drm_framebuffer *fb = state->fb;
 265         struct drm_gem_cma_object *bo = drm_fb_cma_get_gem_obj(fb, 0);
 266         u32 subpixel_src_mask = (1 << 16) - 1;
 267         u32 format = fb->format->format;
 268         int num_planes = fb->format->num_planes;
 269         u32 h_subsample = 1;
 270         u32 v_subsample = 1;
 271         int i;
 272
 273         for (i = 0; i < num_planes; i++)
 274                 vc4_state->offsets[i] = bo->paddr + fb->offsets[i];
 275
 276         /* We don't support subpixel source positioning for scaling. */
 277         if ((state->src_x & subpixel_src_mask) ||
 278             (state->src_y & subpixel_src_mask) ||
 279             (state->src_w & subpixel_src_mask) ||
 280             (state->src_h & subpixel_src_mask)) {
 281                 return -EINVAL;
 282         }
 283
 284         vc4_state->src_x = state->src_x >> 16;
 285         vc4_state->src_y = state->src_y >> 16;
 286         vc4_state->src_w[0] = state->src_w >> 16;
 287         vc4_state->src_h[0] = state->src_h >> 16;
 288
 289         vc4_state->crtc_x = state->crtc_x;
 290         vc4_state->crtc_y = state->crtc_y;
 291         vc4_state->crtc_w = state->crtc_w;
 292         vc4_state->crtc_h = state->crtc_h;
 293
 294         vc4_state->x_scaling[0] = vc4_get_scaling_mode(vc4_state->src_w[0],
 295                                                        vc4_state->crtc_w);
 296         vc4_state->y_scaling[0] = vc4_get_scaling_mode(vc4_state->src_h[0],
 297                                                        vc4_state->crtc_h);
 298
 299         vc4_state->is_unity = (vc4_state->x_scaling[0] == VC4_SCALING_NONE &&
 300                                vc4_state->y_scaling[0] == VC4_SCALING_NONE);
 301
 302         if (num_planes > 1) {
 303                 vc4_state->is_yuv = true;
 304
 305                 h_subsample = drm_format_horz_chroma_subsampling(format);
 306                 v_subsample = drm_format_vert_chroma_subsampling(format);
 307                 vc4_state->src_w[1] = vc4_state->src_w[0] / h_subsample;
 308                 vc4_state->src_h[1] = vc4_state->src_h[0] / v_subsample;
 309
 310                 vc4_state->x_scaling[1] =
 311                         vc4_get_scaling_mode(vc4_state->src_w[1],
 312                                              vc4_state->crtc_w);
 313                 vc4_state->y_scaling[1] =
 314                         vc4_get_scaling_mode(vc4_state->src_h[1],
 315                                              vc4_state->crtc_h);
 316
 317                 /* YUV conversion requires that horizontal scaling be enabled,
 318                  * even on a plane that's otherwise 1:1. Looks like only PPF
 319                  * works in that case, so let's pick that one.
 320                  */
 321                 if (vc4_state->is_unity)
 322                         vc4_state->x_scaling[0] = VC4_SCALING_PPF;
 323         } else {
 324                 vc4_state->x_scaling[1] = VC4_SCALING_NONE;
 325                 vc4_state->y_scaling[1] = VC4_SCALING_NONE;
 326         }
 327
 328         /* No configuring scaling on the cursor plane, since it gets
 329            non-vblank-synced updates, and scaling requires requires
 330            LBM changes which have to be vblank-synced.
 331          */
 332         if (plane->type == DRM_PLANE_TYPE_CURSOR && !vc4_state->is_unity)
 333                 return -EINVAL;
 334
 335         /* Clamp the on-screen start x/y to 0.  The hardware doesn't
 336          * support negative y, and negative x wastes bandwidth.
 337          */
 338         if (vc4_state->crtc_x < 0) {
 339                 for (i = 0; i < num_planes; i++) {
 340                         u32 cpp = fb->format->cpp[i];
 341                         u32 subs = ((i == 0) ? 1 : h_subsample);
 342
 343                         vc4_state->offsets[i] += (cpp *
 344                                                   (-vc4_state->crtc_x) / subs);
 345                 }
 346                 vc4_state->src_w[0] += vc4_state->crtc_x;
 347                 vc4_state->src_w[1] += vc4_state->crtc_x / h_subsample;
 348                 vc4_state->crtc_x = 0;
 349         }
 350
 351         if (vc4_state->crtc_y < 0) {
 352                 for (i = 0; i < num_planes; i++) {
 353                         u32 subs = ((i == 0) ? 1 : v_subsample);
 354
 355                         vc4_state->offsets[i] += (fb->pitches[i] *
 356                                                   (-vc4_state->crtc_y) / subs);
 357                 }
 358                 vc4_state->src_h[0] += vc4_state->crtc_y;
 359                 vc4_state->src_h[1] += vc4_state->crtc_y / v_subsample;
 360                 vc4_state->crtc_y = 0;
 361         }
 362
 363         return 0;
 364 }
 365
 366 static void vc4_write_tpz(struct vc4_plane_state *vc4_state, u32 src, u32 dst)
 367 {
 368         u32 scale, recip;
 369
 370         scale = (1 << 16) * src / dst;
 371
 372         /* The specs note that while the reciprocal would be defined
 373          * as (1<<32)/scale, ~0 is close enough.
 374          */
 375         recip = ~0 / scale;
 376
 377         vc4_dlist_write(vc4_state,
 378                         VC4_SET_FIELD(scale, SCALER_TPZ0_SCALE) |
 379                         VC4_SET_FIELD(0, SCALER_TPZ0_IPHASE));
 380         vc4_dlist_write(vc4_state,
 381                         VC4_SET_FIELD(recip, SCALER_TPZ1_RECIP));
 382 }
 383
 384 static void vc4_write_ppf(struct vc4_plane_state *vc4_state, u32 src, u32 dst)
 385 {
 386         u32 scale = (1 << 16) * src / dst;
 387
 388         vc4_dlist_write(vc4_state,
 389                         SCALER_PPF_AGC |
 390                         VC4_SET_FIELD(scale, SCALER_PPF_SCALE) |
 391                         VC4_SET_FIELD(0, SCALER_PPF_IPHASE));
 392 }
 393
 394 static u32 vc4_lbm_size(struct drm_plane_state *state)
 395 {
 396         struct vc4_plane_state *vc4_state = to_vc4_plane_state(state);
 397         /* This is the worst case number.  One of the two sizes will
 398          * be used depending on the scaling configuration.
 399          */
 400         u32 pix_per_line = max(vc4_state->src_w[0], (u32)vc4_state->crtc_w);
 401         u32 lbm;
 402
 403         if (!vc4_state->is_yuv) {
 404                 if (vc4_state->is_unity)
 405                         return 0;
 406                 else if (vc4_state->y_scaling[0] == VC4_SCALING_TPZ)
 407                         lbm = pix_per_line * 8;
 408                 else {
 409                         /* In special cases, this multiplier might be 12. */
 410                         lbm = pix_per_line * 16;
 411                 }
 412         } else {
 413                 /* There are cases for this going down to a multiplier
 414                  * of 2, but according to the firmware source, the
 415                  * table in the docs is somewhat wrong.
 416                  */
 417                 lbm = pix_per_line * 16;
 418         }
 419
 420         lbm = roundup(lbm, 32);
 421
 422         return lbm;
 423 }
 424
 425 static void vc4_write_scaling_parameters(struct drm_plane_state *state,
 426                                          int channel)
 427 {
 428         struct vc4_plane_state *vc4_state = to_vc4_plane_state(state);
 429
 430         /* Ch0 H-PPF Word 0: Scaling Parameters */
 431         if (vc4_state->x_scaling[channel] == VC4_SCALING_PPF) {
 432                 vc4_write_ppf(vc4_state,
 433                               vc4_state->src_w[channel], vc4_state->crtc_w);
 434         }
 435
 436         /* Ch0 V-PPF Words 0-1: Scaling Parameters, Context */
 437         if (vc4_state->y_scaling[channel] == VC4_SCALING_PPF) {
 438                 vc4_write_ppf(vc4_state,
 439                               vc4_state->src_h[channel], vc4_state->crtc_h);
 440                 vc4_dlist_write(vc4_state, 0xc0c0c0c0);
 441         }
 442
 443         /* Ch0 H-TPZ Words 0-1: Scaling Parameters, Recip */
 444         if (vc4_state->x_scaling[channel] == VC4_SCALING_TPZ) {
 445                 vc4_write_tpz(vc4_state,
 446                               vc4_state->src_w[channel], vc4_state->crtc_w);
 447         }
 448
 449         /* Ch0 V-TPZ Words 0-2: Scaling Parameters, Recip, Context */
 450         if (vc4_state->y_scaling[channel] == VC4_SCALING_TPZ) {
 451                 vc4_write_tpz(vc4_state,
 452                               vc4_state->src_h[channel], vc4_state->crtc_h);
 453                 vc4_dlist_write(vc4_state, 0xc0c0c0c0);
 454         }
 455 }
 456
 457 /* Writes out a full display list for an active plane to the plane's
 458  * private dlist state.
 459  */
 460 static int vc4_plane_mode_set(struct drm_plane *plane,
 461                               struct drm_plane_state *state)
 462 {
 463         struct vc4_dev *vc4 = to_vc4_dev(plane->dev);
 464         struct vc4_plane_state *vc4_state = to_vc4_plane_state(state);
 465         struct drm_framebuffer *fb = state->fb;
 466         u32 ctl0_offset = vc4_state->dlist_count;
 467         const struct hvs_format *format = vc4_get_hvs_format(fb->format->format);
 468         u64 base_format_mod = fourcc_mod_broadcom_mod(fb->modifier);
 469         int num_planes = drm_format_num_planes(format->drm);
 470         bool mix_plane_alpha;
 471         bool covers_screen;
 472         u32 scl0, scl1, pitch0;
 473         u32 lbm_size, tiling;
 474         unsigned long irqflags;
 475         u32 hvs_format = format->hvs;
 476         int ret, i;
 477
 478         ret = vc4_plane_setup_clipping_and_scaling(state);
 479         if (ret)
 480                 return ret;
 481
 482         /* Allocate the LBM memory that the HVS will use for temporary
 483          * storage due to our scaling/format conversion.
 484          */
 485         lbm_size = vc4_lbm_size(state);
 486         if (lbm_size) {
 487                 if (!vc4_state->lbm.allocated) {
 488                         spin_lock_irqsave(&vc4->hvs->mm_lock, irqflags);
 489                         ret = drm_mm_insert_node_generic(&vc4->hvs->lbm_mm,
 490                                                          &vc4_state->lbm,
 491                                                          lbm_size, 32, 0, 0);
 492                         spin_unlock_irqrestore(&vc4->hvs->mm_lock, irqflags);
 493                 } else {
 494                         WARN_ON_ONCE(lbm_size != vc4_state->lbm.size);
 495                 }
 496         }
 497
 498         if (ret)
 499                 return ret;
 500
 501         /* SCL1 is used for Cb/Cr scaling of planar formats.  For RGB
 502          * and 4:4:4, scl1 should be set to scl0 so both channels of
 503          * the scaler do the same thing.  For YUV, the Y plane needs
 504          * to be put in channel 1 and Cb/Cr in channel 0, so we swap
 505          * the scl fields here.
 506          */
 507         if (num_planes == 1) {
 508                 scl0 = vc4_get_scl_field(state, 0);
 509                 scl1 = scl0;
 510         } else {
 511                 scl0 = vc4_get_scl_field(state, 1);
 512                 scl1 = vc4_get_scl_field(state, 0);
 513         }
 514
 515         switch (base_format_mod) {
 516         case DRM_FORMAT_MOD_LINEAR:
 517                 tiling = SCALER_CTL0_TILING_LINEAR;
 518                 pitch0 = VC4_SET_FIELD(fb->pitches[0], SCALER_SRC_PITCH);
 519                 break;
 520
 521         case DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED: {
 522                 /* For T-tiled, the FB pitch is "how many bytes from
 523                  * one row to the next, such that pitch * tile_h ==
 524                  * tile_size * tiles_per_row."
 525                  */
 526                 u32 tile_size_shift = 12; /* T tiles are 4kb */
 527                 u32 tile_h_shift = 5; /* 16 and 32bpp are 32 pixels high */
 528                 u32 tiles_w = fb->pitches[0] >> (tile_size_shift - tile_h_shift);
 529
 530                 tiling = SCALER_CTL0_TILING_256B_OR_T;
 531
 532                 pitch0 = (VC4_SET_FIELD(0, SCALER_PITCH0_TILE_Y_OFFSET) |
 533                           VC4_SET_FIELD(0, SCALER_PITCH0_TILE_WIDTH_L) |
 534                           VC4_SET_FIELD(tiles_w, SCALER_PITCH0_TILE_WIDTH_R));
 535                 break;
 536         }
 537
 538         case DRM_FORMAT_MOD_BROADCOM_SAND64:
 539         case DRM_FORMAT_MOD_BROADCOM_SAND128:
 540         case DRM_FORMAT_MOD_BROADCOM_SAND256: {
 541                 uint32_t param = fourcc_mod_broadcom_param(fb->modifier);
 542
 543                 /* Column-based NV12 or RGBA.
 544                  */
 545                 if (fb->format->num_planes > 1) {
 546                         if (hvs_format != HVS_PIXEL_FORMAT_YCBCR_YUV420_2PLANE) {
 547                                 DRM_DEBUG_KMS("SAND format only valid for NV12/21");
 548                                 return -EINVAL;
 549                         }
 550                         hvs_format = HVS_PIXEL_FORMAT_H264;
 551                 } else {
 552                         if (base_format_mod == DRM_FORMAT_MOD_BROADCOM_SAND256) {
 553                                 DRM_DEBUG_KMS("SAND256 format only valid for H.264");
 554                                 return -EINVAL;
 555                         }
 556                 }
 557
 558                 switch (base_format_mod) {
 559                 case DRM_FORMAT_MOD_BROADCOM_SAND64:
 560                         tiling = SCALER_CTL0_TILING_64B;
 561                         break;
 562                 case DRM_FORMAT_MOD_BROADCOM_SAND128:
 563                         tiling = SCALER_CTL0_TILING_128B;
 564                         break;
 565                 case DRM_FORMAT_MOD_BROADCOM_SAND256:
 566                         tiling = SCALER_CTL0_TILING_256B_OR_T;
 567                         break;
 568                 default:
 569                         break;
 570                 }
 571
 572                 if (param > SCALER_TILE_HEIGHT_MASK) {
 573                         DRM_DEBUG_KMS("SAND height too large (%d)\n", param);
 574                         return -EINVAL;
 575                 }
 576
 577                 pitch0 = VC4_SET_FIELD(param, SCALER_TILE_HEIGHT);
 578                 break;
 579         }
 580
 581         default:
 582                 DRM_DEBUG_KMS("Unsupported FB tiling flag 0x%16llx",
 583                               (long long)fb->modifier);
 584                 return -EINVAL;
 585         }
 586
 587         /* Control word */
 588         vc4_dlist_write(vc4_state,
 589                         SCALER_CTL0_VALID |
 590                         VC4_SET_FIELD(SCALER_CTL0_RGBA_EXPAND_ROUND, SCALER_CTL0_RGBA_EXPAND) |
 591                         (format->pixel_order << SCALER_CTL0_ORDER_SHIFT) |
 592                         (hvs_format << SCALER_CTL0_PIXEL_FORMAT_SHIFT) |
 593                         VC4_SET_FIELD(tiling, SCALER_CTL0_TILING) |
 594                         (vc4_state->is_unity ? SCALER_CTL0_UNITY : 0) |
 595                         VC4_SET_FIELD(scl0, SCALER_CTL0_SCL0) |
 596                         VC4_SET_FIELD(scl1, SCALER_CTL0_SCL1));
 597
 598         /* Position Word 0: Image Positions and Alpha Value */
 599         vc4_state->pos0_offset = vc4_state->dlist_count;
 600         vc4_dlist_write(vc4_state,
 601                         VC4_SET_FIELD(state->alpha >> 8, SCALER_POS0_FIXED_ALPHA) |
 602                         VC4_SET_FIELD(vc4_state->crtc_x, SCALER_POS0_START_X) |
 603                         VC4_SET_FIELD(vc4_state->crtc_y, SCALER_POS0_START_Y));
 604
 605         /* Position Word 1: Scaled Image Dimensions. */
 606         if (!vc4_state->is_unity) {
 607                 vc4_dlist_write(vc4_state,
 608                                 VC4_SET_FIELD(vc4_state->crtc_w,
 609                                               SCALER_POS1_SCL_WIDTH) |
 610                                 VC4_SET_FIELD(vc4_state->crtc_h,
 611                                               SCALER_POS1_SCL_HEIGHT));
 612         }
 613
 614         /* Don't waste cycles mixing with plane alpha if the set alpha
 615          * is opaque or there is no per-pixel alpha information.
 616          * In any case we use the alpha property value as the fixed alpha.
 617          */
 618         mix_plane_alpha = state->alpha != DRM_BLEND_ALPHA_OPAQUE &&
 619                           fb->format->has_alpha;
 620
 621         /* Position Word 2: Source Image Size, Alpha */
 622         vc4_state->pos2_offset = vc4_state->dlist_count;
 623         vc4_dlist_write(vc4_state,
 624                         VC4_SET_FIELD(fb->format->has_alpha ?
 625                                       SCALER_POS2_ALPHA_MODE_PIPELINE :
 626                                       SCALER_POS2_ALPHA_MODE_FIXED,
 627                                       SCALER_POS2_ALPHA_MODE) |
 628                         (mix_plane_alpha ? SCALER_POS2_ALPHA_MIX : 0) |
 629                         (fb->format->has_alpha ? SCALER_POS2_ALPHA_PREMULT : 0) |
 630                         VC4_SET_FIELD(vc4_state->src_w[0], SCALER_POS2_WIDTH) |
 631                         VC4_SET_FIELD(vc4_state->src_h[0], SCALER_POS2_HEIGHT));
 632
 633         /* Position Word 3: Context.  Written by the HVS. */
 634         vc4_dlist_write(vc4_state, 0xc0c0c0c0);
 635
 636
 637         /* Pointer Word 0/1/2: RGB / Y / Cb / Cr Pointers
 638          *
 639          * The pointers may be any byte address.
 640          */
 641         vc4_state->ptr0_offset = vc4_state->dlist_count;
 642         for (i = 0; i < num_planes; i++)
 643                 vc4_dlist_write(vc4_state, vc4_state->offsets[i]);
 644
 645         /* Pointer Context Word 0/1/2: Written by the HVS */
 646         for (i = 0; i < num_planes; i++)
 647                 vc4_dlist_write(vc4_state, 0xc0c0c0c0);
 648
 649         /* Pitch word 0 */
 650         vc4_dlist_write(vc4_state, pitch0);
 651
 652         /* Pitch word 1/2 */
 653         for (i = 1; i < num_planes; i++) {
 654                 if (hvs_format != HVS_PIXEL_FORMAT_H264) {
 655                         vc4_dlist_write(vc4_state,
 656                                         VC4_SET_FIELD(fb->pitches[i],
 657                                                       SCALER_SRC_PITCH));
 658                 } else {
 659                         vc4_dlist_write(vc4_state, pitch0);
 660                 }
 661         }
 662
 663         /* Colorspace conversion words */
 664         if (vc4_state->is_yuv) {
 665                 vc4_dlist_write(vc4_state, SCALER_CSC0_ITR_R_601_5);
 666                 vc4_dlist_write(vc4_state, SCALER_CSC1_ITR_R_601_5);
 667                 vc4_dlist_write(vc4_state, SCALER_CSC2_ITR_R_601_5);
 668         }
 669
 670         if (vc4_state->x_scaling[0] != VC4_SCALING_NONE ||
 671             vc4_state->x_scaling[1] != VC4_SCALING_NONE ||
 672             vc4_state->y_scaling[0] != VC4_SCALING_NONE ||
 673             vc4_state->y_scaling[1] != VC4_SCALING_NONE) {
 674                 /* LBM Base Address. */
 675                 if (vc4_state->y_scaling[0] != VC4_SCALING_NONE ||
 676                     vc4_state->y_scaling[1] != VC4_SCALING_NONE) {
 677                         vc4_dlist_write(vc4_state, vc4_state->lbm.start);
 678                 }
 679
 680                 if (num_planes > 1) {
 681                         /* Emit Cb/Cr as channel 0 and Y as channel
 682                          * 1. This matches how we set up scl0/scl1
 683                          * above.
 684                          */
 685                         vc4_write_scaling_parameters(state, 1);
 686                 }
 687                 vc4_write_scaling_parameters(state, 0);
 688
 689                 /* If any PPF setup was done, then all the kernel
 690                  * pointers get uploaded.
 691                  */
 692                 if (vc4_state->x_scaling[0] == VC4_SCALING_PPF ||
 693                     vc4_state->y_scaling[0] == VC4_SCALING_PPF ||
 694                     vc4_state->x_scaling[1] == VC4_SCALING_PPF ||
 695                     vc4_state->y_scaling[1] == VC4_SCALING_PPF) {
 696                         u32 kernel = VC4_SET_FIELD(vc4->hvs->mitchell_netravali_filter.start,
 697                                                    SCALER_PPF_KERNEL_OFFSET);
 698
 699                         /* HPPF plane 0 */
 700                         vc4_dlist_write(vc4_state, kernel);
 701                         /* VPPF plane 0 */
 702                         vc4_dlist_write(vc4_state, kernel);
 703                         /* HPPF plane 1 */
 704                         vc4_dlist_write(vc4_state, kernel);
 705                         /* VPPF plane 1 */
 706                         vc4_dlist_write(vc4_state, kernel);
 707                 }
 708         }
 709
 710         vc4_state->dlist[ctl0_offset] |=
 711                 VC4_SET_FIELD(vc4_state->dlist_count, SCALER_CTL0_SIZE);
 712
 713         /* crtc_* are already clipped coordinates. */
 714         covers_screen = vc4_state->crtc_x == 0 && vc4_state->crtc_y == 0 &&
 715                         vc4_state->crtc_w == state->crtc->mode.hdisplay &&
 716                         vc4_state->crtc_h == state->crtc->mode.vdisplay;
 717         /* Background fill might be necessary when the plane has per-pixel
 718          * alpha content or a non-opaque plane alpha and could blend from the
 719          * background or does not cover the entire screen.
 720          */
 721         vc4_state->needs_bg_fill = fb->format->has_alpha || !covers_screen ||
 722                                    state->alpha != DRM_BLEND_ALPHA_OPAQUE;
 723
 724         return 0;
 725 }
 726
 727 /* If a modeset involves changing the setup of a plane, the atomic
 728  * infrastructure will call this to validate a proposed plane setup.
 729  * However, if a plane isn't getting updated, this (and the
 730  * corresponding vc4_plane_atomic_update) won't get called.  Thus, we
 731  * compute the dlist here and have all active plane dlists get updated
 732  * in the CRTC's flush.
 733  */
 734 static int vc4_plane_atomic_check(struct drm_plane *plane,
 735                                   struct drm_plane_state *state)
 736 {
 737         struct vc4_plane_state *vc4_state = to_vc4_plane_state(state);
 738
 739         vc4_state->dlist_count = 0;
 740
 741         if (plane_enabled(state))
 742                 return vc4_plane_mode_set(plane, state);
 743         else
 744                 return 0;
 745 }
 746
 747 static void vc4_plane_atomic_update(struct drm_plane *plane,
 748                                     struct drm_plane_state *old_state)
 749 {
 750         /* No contents here.  Since we don't know where in the CRTC's
 751          * dlist we should be stored, our dlist is uploaded to the
 752          * hardware with vc4_plane_write_dlist() at CRTC atomic_flush
 753          * time.
 754          */
 755 }
 756
 757 u32 vc4_plane_write_dlist(struct drm_plane *plane, u32 __iomem *dlist)
 758 {
 759         struct vc4_plane_state *vc4_state = to_vc4_plane_state(plane->state);
 760         int i;
 761
 762         vc4_state->hw_dlist = dlist;
 763
 764         /* Can't memcpy_toio() because it needs to be 32-bit writes. */
 765         for (i = 0; i < vc4_state->dlist_count; i++)
 766                 writel(vc4_state->dlist[i], &dlist[i]);
 767
 768         return vc4_state->dlist_count;
 769 }
 770
 771 u32 vc4_plane_dlist_size(const struct drm_plane_state *state)
 772 {
 773         const struct vc4_plane_state *vc4_state =
 774                 container_of(state, typeof(*vc4_state), base);
 775
 776         return vc4_state->dlist_count;
 777 }
 778
 779 /* Updates the plane to immediately (well, once the FIFO needs
 780  * refilling) scan out from at a new framebuffer.
 781  */
 782 void vc4_plane_async_set_fb(struct drm_plane *plane, struct drm_framebuffer *fb)
 783 {
 784         struct vc4_plane_state *vc4_state = to_vc4_plane_state(plane->state);
 785         struct drm_gem_cma_object *bo = drm_fb_cma_get_gem_obj(fb, 0);
 786         uint32_t addr;
 787
 788         /* We're skipping the address adjustment for negative origin,
 789          * because this is only called on the primary plane.
 790          */
 791         WARN_ON_ONCE(plane->state->crtc_x < 0 || plane->state->crtc_y < 0);
 792         addr = bo->paddr + fb->offsets[0];
 793
 794         /* Write the new address into the hardware immediately.  The
 795          * scanout will start from this address as soon as the FIFO
 796          * needs to refill with pixels.
 797          */
 798         writel(addr, &vc4_state->hw_dlist[vc4_state->ptr0_offset]);
 799
 800         /* Also update the CPU-side dlist copy, so that any later
 801          * atomic updates that don't do a new modeset on our plane
 802          * also use our updated address.
 803          */
 804         vc4_state->dlist[vc4_state->ptr0_offset] = addr;
 805 }
 806
 807 static void vc4_plane_atomic_async_update(struct drm_plane *plane,
 808                                           struct drm_plane_state *state)
 809 {
 810         struct vc4_plane_state *vc4_state = to_vc4_plane_state(plane->state);
 811
 812         if (plane->state->fb != state->fb) {
 813                 vc4_plane_async_set_fb(plane, state->fb);
 814                 drm_atomic_set_fb_for_plane(plane->state, state->fb);
 815         }
 816
 817         /* Set the cursor's position on the screen.  This is the
 818          * expected change from the drm_mode_cursor_universal()
 819          * helper.
 820          */
 821         plane->state->crtc_x = state->crtc_x;
 822         plane->state->crtc_y = state->crtc_y;
 823
 824         /* Allow changing the start position within the cursor BO, if
 825          * that matters.
 826          */
 827         plane->state->src_x = state->src_x;
 828         plane->state->src_y = state->src_y;
 829
 830         /* Update the display list based on the new crtc_x/y. */
 831         vc4_plane_atomic_check(plane, plane->state);
 832
 833         /* Note that we can't just call vc4_plane_write_dlist()
 834          * because that would smash the context data that the HVS is
 835          * currently using.
 836          */
 837         writel(vc4_state->dlist[vc4_state->pos0_offset],
 838                &vc4_state->hw_dlist[vc4_state->pos0_offset]);
 839         writel(vc4_state->dlist[vc4_state->pos2_offset],
 840                &vc4_state->hw_dlist[vc4_state->pos2_offset]);
 841         writel(vc4_state->dlist[vc4_state->ptr0_offset],
 842                &vc4_state->hw_dlist[vc4_state->ptr0_offset]);
 843 }
 844
 845 static int vc4_plane_atomic_async_check(struct drm_plane *plane,
 846                                         struct drm_plane_state *state)
 847 {
 848         /* No configuring new scaling in the fast path. */
 849         if (plane->state->crtc_w != state->crtc_w ||
 850             plane->state->crtc_h != state->crtc_h ||
 851             plane->state->src_w != state->src_w ||
 852             plane->state->src_h != state->src_h)
 853                 return -EINVAL;
 854
 855         return 0;
 856 }
 857
 858 static int vc4_prepare_fb(struct drm_plane *plane,
 859                           struct drm_plane_state *state)
 860 {
 861         struct vc4_bo *bo;
 862         struct dma_fence *fence;
 863         int ret;
 864
 865         if (!state->fb)
 866                 return 0;
 867
 868         bo = to_vc4_bo(&drm_fb_cma_get_gem_obj(state->fb, 0)->base);
 869
 870         fence = reservation_object_get_excl_rcu(bo->resv);
 871         drm_atomic_set_fence_for_plane(state, fence);
 872
 873         if (plane->state->fb == state->fb)
 874                 return 0;
 875
 876         ret = vc4_bo_inc_usecnt(bo);
 877         if (ret)
 878                 return ret;
 879
 880         return 0;
 881 }
 882
 883 static void vc4_cleanup_fb(struct drm_plane *plane,
 884                            struct drm_plane_state *state)
 885 {
 886         struct vc4_bo *bo;
 887
 888         if (plane->state->fb == state->fb || !state->fb)
 889                 return;
 890
 891         bo = to_vc4_bo(&drm_fb_cma_get_gem_obj(state->fb, 0)->base);
 892         vc4_bo_dec_usecnt(bo);
 893 }
 894
 895 static const struct drm_plane_helper_funcs vc4_plane_helper_funcs = {
 896         .atomic_check = vc4_plane_atomic_check,
 897         .atomic_update = vc4_plane_atomic_update,
 898         .prepare_fb = vc4_prepare_fb,
 899         .cleanup_fb = vc4_cleanup_fb,
 900         .atomic_async_check = vc4_plane_atomic_async_check,
 901         .atomic_async_update = vc4_plane_atomic_async_update,
 902 };
 903
 904 static void vc4_plane_destroy(struct drm_plane *plane)
 905 {
 906         drm_plane_helper_disable(plane, NULL);
 907         drm_plane_cleanup(plane);
 908 }
 909
 910 static bool vc4_format_mod_supported(struct drm_plane *plane,
 911                                      uint32_t format,
 912                                      uint64_t modifier)
 913 {
 914         /* Support T_TILING for RGB formats only. */
 915         switch (format) {
 916         case DRM_FORMAT_XRGB8888:
 917         case DRM_FORMAT_ARGB8888:
 918         case DRM_FORMAT_ABGR8888:
 919         case DRM_FORMAT_XBGR8888:
 920         case DRM_FORMAT_RGB565:
 921         case DRM_FORMAT_BGR565:
 922         case DRM_FORMAT_ARGB1555:
 923         case DRM_FORMAT_XRGB1555:
 924                 switch (fourcc_mod_broadcom_mod(modifier)) {
 925                 case DRM_FORMAT_MOD_LINEAR:
 926                 case DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED:
 927                 case DRM_FORMAT_MOD_BROADCOM_SAND64:
 928                 case DRM_FORMAT_MOD_BROADCOM_SAND128:
 929                         return true;
 930                 default:
 931                         return false;
 932                 }
 933         case DRM_FORMAT_NV12:
 934         case DRM_FORMAT_NV21:
 935                 switch (fourcc_mod_broadcom_mod(modifier)) {
 936                 case DRM_FORMAT_MOD_LINEAR:
 937                 case DRM_FORMAT_MOD_BROADCOM_SAND64:
 938                 case DRM_FORMAT_MOD_BROADCOM_SAND128:
 939                 case DRM_FORMAT_MOD_BROADCOM_SAND256:
 940                         return true;
 941                 default:
 942                         return false;
 943                 }
 944         case DRM_FORMAT_YUV422:
 945         case DRM_FORMAT_YVU422:
 946         case DRM_FORMAT_YUV420:
 947         case DRM_FORMAT_YVU420:
 948         case DRM_FORMAT_NV16:
 949         case DRM_FORMAT_NV61:
 950         default:
 951                 return (modifier == DRM_FORMAT_MOD_LINEAR);
 952         }
 953 }
 954
 955 static const struct drm_plane_funcs vc4_plane_funcs = {
 956         .update_plane = drm_atomic_helper_update_plane,
 957         .disable_plane = drm_atomic_helper_disable_plane,
 958         .destroy = vc4_plane_destroy,
 959         .set_property = NULL,
 960         .reset = vc4_plane_reset,
 961         .atomic_duplicate_state = vc4_plane_duplicate_state,
 962         .atomic_destroy_state = vc4_plane_destroy_state,
 963         .format_mod_supported = vc4_format_mod_supported,
 964 };
 965
 966 struct drm_plane *vc4_plane_init(struct drm_device *dev,
 967                                  enum drm_plane_type type)
 968 {
 969         struct drm_plane *plane = NULL;
 970         struct vc4_plane *vc4_plane;
 971         u32 formats[ARRAY_SIZE(hvs_formats)];
 972         u32 num_formats = 0;
 973         int ret = 0;
 974         unsigned i;
 975         static const uint64_t modifiers[] = {
 976                 DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED,
 977                 DRM_FORMAT_MOD_BROADCOM_SAND128,
 978                 DRM_FORMAT_MOD_BROADCOM_SAND64,
 979                 DRM_FORMAT_MOD_BROADCOM_SAND256,
 980                 DRM_FORMAT_MOD_LINEAR,
 981                 DRM_FORMAT_MOD_INVALID
 982         };
 983
 984         vc4_plane = devm_kzalloc(dev->dev, sizeof(*vc4_plane),
 985                                  GFP_KERNEL);
 986         if (!vc4_plane)
 987                 return ERR_PTR(-ENOMEM);
 988
 989         for (i = 0; i < ARRAY_SIZE(hvs_formats); i++) {
 990                 /* Don't allow YUV in cursor planes, since that means
 991                  * tuning on the scaler, which we don't allow for the
 992                  * cursor.
 993                  */
 994                 if (type != DRM_PLANE_TYPE_CURSOR ||
 995                     hvs_formats[i].hvs < HVS_PIXEL_FORMAT_YCBCR_YUV420_3PLANE) {
 996                         formats[num_formats++] = hvs_formats[i].drm;
 997                 }
 998         }
 999         plane = &vc4_plane->base;
1000         ret = drm_universal_plane_init(dev, plane, 0,
1001                                        &vc4_plane_funcs,
1002                                        formats, num_formats,
1003                                        modifiers, type, NULL);
1004
1005         drm_plane_helper_add(plane, &vc4_plane_helper_funcs);
1006
1007         drm_plane_create_alpha_property(plane);
1008
1009         return plane;
1010 }