drivers/gpu/drm/vc4/vc4_plane.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2015 Broadcom
   4  */
   5
   6 /**
   7  * DOC: VC4 plane module
   8  *
   9  * Each DRM plane is a layer of pixels being scanned out by the HVS.
  10  *
  11  * At atomic modeset check time, we compute the HVS display element
  12  * state that would be necessary for displaying the plane (giving us a
  13  * chance to figure out if a plane configuration is invalid), then at
  14  * atomic flush time the CRTC will ask us to write our element state
  15  * into the region of the HVS that it has allocated for us.
  16  */
  17
  18 #include <drm/drm_atomic.h>
  19 #include <drm/drm_atomic_helper.h>
  20 #include <drm/drm_atomic_uapi.h>
  21 #include <drm/drm_fb_cma_helper.h>
  22 #include <drm/drm_fourcc.h>
  23 #include <drm/drm_gem_atomic_helper.h>
  24 #include <drm/drm_plane_helper.h>
  25
  26 #include "uapi/drm/vc4_drm.h"
  27
  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         u32 pixel_order_hvs5;
  36         bool hvs5_only;
  37 } hvs_formats[] = {
  38         {
  39                 .drm = DRM_FORMAT_XRGB8888,
  40                 .hvs = HVS_PIXEL_FORMAT_RGBA8888,
  41                 .pixel_order = HVS_PIXEL_ORDER_ABGR,
  42                 .pixel_order_hvs5 = HVS_PIXEL_ORDER_ARGB,
  43         },
  44         {
  45                 .drm = DRM_FORMAT_ARGB8888,
  46                 .hvs = HVS_PIXEL_FORMAT_RGBA8888,
  47                 .pixel_order = HVS_PIXEL_ORDER_ABGR,
  48                 .pixel_order_hvs5 = HVS_PIXEL_ORDER_ARGB,
  49         },
  50         {
  51                 .drm = DRM_FORMAT_ABGR8888,
  52                 .hvs = HVS_PIXEL_FORMAT_RGBA8888,
  53                 .pixel_order = HVS_PIXEL_ORDER_ARGB,
  54                 .pixel_order_hvs5 = HVS_PIXEL_ORDER_ABGR,
  55         },
  56         {
  57                 .drm = DRM_FORMAT_XBGR8888,
  58                 .hvs = HVS_PIXEL_FORMAT_RGBA8888,
  59                 .pixel_order = HVS_PIXEL_ORDER_ARGB,
  60                 .pixel_order_hvs5 = HVS_PIXEL_ORDER_ABGR,
  61         },
  62         {
  63                 .drm = DRM_FORMAT_RGB565,
  64                 .hvs = HVS_PIXEL_FORMAT_RGB565,
  65                 .pixel_order = HVS_PIXEL_ORDER_XRGB,
  66                 .pixel_order_hvs5 = HVS_PIXEL_ORDER_XRGB,
  67         },
  68         {
  69                 .drm = DRM_FORMAT_BGR565,
  70                 .hvs = HVS_PIXEL_FORMAT_RGB565,
  71                 .pixel_order = HVS_PIXEL_ORDER_XBGR,
  72                 .pixel_order_hvs5 = HVS_PIXEL_ORDER_XBGR,
  73         },
  74         {
  75                 .drm = DRM_FORMAT_ARGB1555,
  76                 .hvs = HVS_PIXEL_FORMAT_RGBA5551,
  77                 .pixel_order = HVS_PIXEL_ORDER_ABGR,
  78                 .pixel_order_hvs5 = HVS_PIXEL_ORDER_ARGB,
  79         },
  80         {
  81                 .drm = DRM_FORMAT_XRGB1555,
  82                 .hvs = HVS_PIXEL_FORMAT_RGBA5551,
  83                 .pixel_order = HVS_PIXEL_ORDER_ABGR,
  84                 .pixel_order_hvs5 = HVS_PIXEL_ORDER_ARGB,
  85         },
  86         {
  87                 .drm = DRM_FORMAT_RGB888,
  88                 .hvs = HVS_PIXEL_FORMAT_RGB888,
  89                 .pixel_order = HVS_PIXEL_ORDER_XRGB,
  90                 .pixel_order_hvs5 = HVS_PIXEL_ORDER_XRGB,
  91         },
  92         {
  93                 .drm = DRM_FORMAT_BGR888,
  94                 .hvs = HVS_PIXEL_FORMAT_RGB888,
  95                 .pixel_order = HVS_PIXEL_ORDER_XBGR,
  96                 .pixel_order_hvs5 = HVS_PIXEL_ORDER_XBGR,
  97         },
  98         {
  99                 .drm = DRM_FORMAT_YUV422,
 100                 .hvs = HVS_PIXEL_FORMAT_YCBCR_YUV422_3PLANE,
 101                 .pixel_order = HVS_PIXEL_ORDER_XYCBCR,
 102                 .pixel_order_hvs5 = HVS_PIXEL_ORDER_XYCBCR,
 103         },
 104         {
 105                 .drm = DRM_FORMAT_YVU422,
 106                 .hvs = HVS_PIXEL_FORMAT_YCBCR_YUV422_3PLANE,
 107                 .pixel_order = HVS_PIXEL_ORDER_XYCRCB,
 108                 .pixel_order_hvs5 = HVS_PIXEL_ORDER_XYCRCB,
 109         },
 110         {
 111                 .drm = DRM_FORMAT_YUV420,
 112                 .hvs = HVS_PIXEL_FORMAT_YCBCR_YUV420_3PLANE,
 113                 .pixel_order = HVS_PIXEL_ORDER_XYCBCR,
 114                 .pixel_order_hvs5 = HVS_PIXEL_ORDER_XYCBCR,
 115         },
 116         {
 117                 .drm = DRM_FORMAT_YVU420,
 118                 .hvs = HVS_PIXEL_FORMAT_YCBCR_YUV420_3PLANE,
 119                 .pixel_order = HVS_PIXEL_ORDER_XYCRCB,
 120                 .pixel_order_hvs5 = HVS_PIXEL_ORDER_XYCRCB,
 121         },
 122         {
 123                 .drm = DRM_FORMAT_NV12,
 124                 .hvs = HVS_PIXEL_FORMAT_YCBCR_YUV420_2PLANE,
 125                 .pixel_order = HVS_PIXEL_ORDER_XYCBCR,
 126                 .pixel_order_hvs5 = HVS_PIXEL_ORDER_XYCBCR,
 127         },
 128         {
 129                 .drm = DRM_FORMAT_NV21,
 130                 .hvs = HVS_PIXEL_FORMAT_YCBCR_YUV420_2PLANE,
 131                 .pixel_order = HVS_PIXEL_ORDER_XYCRCB,
 132                 .pixel_order_hvs5 = HVS_PIXEL_ORDER_XYCRCB,
 133         },
 134         {
 135                 .drm = DRM_FORMAT_NV16,
 136                 .hvs = HVS_PIXEL_FORMAT_YCBCR_YUV422_2PLANE,
 137                 .pixel_order = HVS_PIXEL_ORDER_XYCBCR,
 138                 .pixel_order_hvs5 = HVS_PIXEL_ORDER_XYCBCR,
 139         },
 140         {
 141                 .drm = DRM_FORMAT_NV61,
 142                 .hvs = HVS_PIXEL_FORMAT_YCBCR_YUV422_2PLANE,
 143                 .pixel_order = HVS_PIXEL_ORDER_XYCRCB,
 144                 .pixel_order_hvs5 = HVS_PIXEL_ORDER_XYCRCB,
 145         },
 146         {
 147                 .drm = DRM_FORMAT_P030,
 148                 .hvs = HVS_PIXEL_FORMAT_YCBCR_10BIT,
 149                 .pixel_order_hvs5 = HVS_PIXEL_ORDER_XYCBCR,
 150                 .hvs5_only = true,
 151         },
 152         {
 153                 .drm = DRM_FORMAT_XRGB2101010,
 154                 .hvs = HVS_PIXEL_FORMAT_RGBA1010102,
 155                 .pixel_order_hvs5 = HVS_PIXEL_ORDER_ARGB,
 156                 .hvs5_only = true,
 157         },
 158         {
 159                 .drm = DRM_FORMAT_ARGB2101010,
 160                 .hvs = HVS_PIXEL_FORMAT_RGBA1010102,
 161                 .pixel_order_hvs5 = HVS_PIXEL_ORDER_ARGB,
 162                 .hvs5_only = true,
 163         },
 164         {
 165                 .drm = DRM_FORMAT_ABGR2101010,
 166                 .hvs = HVS_PIXEL_FORMAT_RGBA1010102,
 167                 .pixel_order_hvs5 = HVS_PIXEL_ORDER_ABGR,
 168                 .hvs5_only = true,
 169         },
 170         {
 171                 .drm = DRM_FORMAT_XBGR2101010,
 172                 .hvs = HVS_PIXEL_FORMAT_RGBA1010102,
 173                 .pixel_order_hvs5 = HVS_PIXEL_ORDER_ABGR,
 174                 .hvs5_only = true,
 175         },
 176         {
 177                 .drm = DRM_FORMAT_RGB332,
 178                 .hvs = HVS_PIXEL_FORMAT_RGB332,
 179                 .pixel_order = HVS_PIXEL_ORDER_ARGB,
 180                 .pixel_order_hvs5 = HVS_PIXEL_ORDER_ARGB,
 181         },
 182         {
 183                 .drm = DRM_FORMAT_BGR233,
 184                 .hvs = HVS_PIXEL_FORMAT_RGB332,
 185                 .pixel_order = HVS_PIXEL_ORDER_ABGR,
 186                 .pixel_order_hvs5 = HVS_PIXEL_ORDER_ABGR,
 187         },
 188         {
 189                 .drm = DRM_FORMAT_XRGB4444,
 190                 .hvs = HVS_PIXEL_FORMAT_RGBA4444,
 191                 .pixel_order = HVS_PIXEL_ORDER_ABGR,
 192                 .pixel_order_hvs5 = HVS_PIXEL_ORDER_ARGB,
 193         },
 194         {
 195                 .drm = DRM_FORMAT_ARGB4444,
 196                 .hvs = HVS_PIXEL_FORMAT_RGBA4444,
 197                 .pixel_order = HVS_PIXEL_ORDER_ABGR,
 198                 .pixel_order_hvs5 = HVS_PIXEL_ORDER_ARGB,
 199         },
 200         {
 201                 .drm = DRM_FORMAT_XBGR4444,
 202                 .hvs = HVS_PIXEL_FORMAT_RGBA4444,
 203                 .pixel_order = HVS_PIXEL_ORDER_ARGB,
 204                 .pixel_order_hvs5 = HVS_PIXEL_ORDER_ABGR,
 205         },
 206         {
 207                 .drm = DRM_FORMAT_ABGR4444,
 208                 .hvs = HVS_PIXEL_FORMAT_RGBA4444,
 209                 .pixel_order = HVS_PIXEL_ORDER_ARGB,
 210                 .pixel_order_hvs5 = HVS_PIXEL_ORDER_ABGR,
 211         },
 212         {
 213                 .drm = DRM_FORMAT_BGRX4444,
 214                 .hvs = HVS_PIXEL_FORMAT_RGBA4444,
 215                 .pixel_order = HVS_PIXEL_ORDER_RGBA,
 216                 .pixel_order_hvs5 = HVS_PIXEL_ORDER_BGRA,
 217         },
 218         {
 219                 .drm = DRM_FORMAT_BGRA4444,
 220                 .hvs = HVS_PIXEL_FORMAT_RGBA4444,
 221                 .pixel_order = HVS_PIXEL_ORDER_RGBA,
 222                 .pixel_order_hvs5 = HVS_PIXEL_ORDER_BGRA,
 223         },
 224         {
 225                 .drm = DRM_FORMAT_RGBX4444,
 226                 .hvs = HVS_PIXEL_FORMAT_RGBA4444,
 227                 .pixel_order = HVS_PIXEL_ORDER_BGRA,
 228                 .pixel_order_hvs5 = HVS_PIXEL_ORDER_RGBA,
 229         },
 230         {
 231                 .drm = DRM_FORMAT_RGBA4444,
 232                 .hvs = HVS_PIXEL_FORMAT_RGBA4444,
 233                 .pixel_order = HVS_PIXEL_ORDER_BGRA,
 234                 .pixel_order_hvs5 = HVS_PIXEL_ORDER_RGBA,
 235         },
 236 };
 237
 238 static const struct hvs_format *vc4_get_hvs_format(u32 drm_format)
 239 {
 240         unsigned i;
 241
 242         for (i = 0; i < ARRAY_SIZE(hvs_formats); i++) {
 243                 if (hvs_formats[i].drm == drm_format)
 244                         return &hvs_formats[i];
 245         }
 246
 247         return NULL;
 248 }
 249
 250 static enum vc4_scaling_mode vc4_get_scaling_mode(u32 src, u32 dst)
 251 {
 252         if (dst == src >> 16)
 253                 return VC4_SCALING_NONE;
 254         if (3 * dst >= 2 * (src >> 16))
 255                 return VC4_SCALING_PPF;
 256         else
 257                 return VC4_SCALING_TPZ;
 258 }
 259
 260 static bool plane_enabled(struct drm_plane_state *state)
 261 {
 262         return state->fb && !WARN_ON(!state->crtc);
 263 }
 264
 265 static struct drm_plane_state *vc4_plane_duplicate_state(struct drm_plane *plane)
 266 {
 267         struct vc4_plane_state *vc4_state;
 268
 269         if (WARN_ON(!plane->state))
 270                 return NULL;
 271
 272         vc4_state = kmemdup(plane->state, sizeof(*vc4_state), GFP_KERNEL);
 273         if (!vc4_state)
 274                 return NULL;
 275
 276         memset(&vc4_state->lbm, 0, sizeof(vc4_state->lbm));
 277         vc4_state->dlist_initialized = 0;
 278
 279         __drm_atomic_helper_plane_duplicate_state(plane, &vc4_state->base);
 280
 281         if (vc4_state->dlist) {
 282                 vc4_state->dlist = kmemdup(vc4_state->dlist,
 283                                            vc4_state->dlist_count * 4,
 284                                            GFP_KERNEL);
 285                 if (!vc4_state->dlist) {
 286                         kfree(vc4_state);
 287                         return NULL;
 288                 }
 289                 vc4_state->dlist_size = vc4_state->dlist_count;
 290         }
 291
 292         return &vc4_state->base;
 293 }
 294
 295 static void vc4_plane_destroy_state(struct drm_plane *plane,
 296                                     struct drm_plane_state *state)
 297 {
 298         struct vc4_dev *vc4 = to_vc4_dev(plane->dev);
 299         struct vc4_plane_state *vc4_state = to_vc4_plane_state(state);
 300
 301         if (drm_mm_node_allocated(&vc4_state->lbm)) {
 302                 unsigned long irqflags;
 303
 304                 spin_lock_irqsave(&vc4->hvs->mm_lock, irqflags);
 305                 drm_mm_remove_node(&vc4_state->lbm);
 306                 spin_unlock_irqrestore(&vc4->hvs->mm_lock, irqflags);
 307         }
 308
 309         kfree(vc4_state->dlist);
 310         __drm_atomic_helper_plane_destroy_state(&vc4_state->base);
 311         kfree(state);
 312 }
 313
 314 /* Called during init to allocate the plane's atomic state. */
 315 static void vc4_plane_reset(struct drm_plane *plane)
 316 {
 317         struct vc4_plane_state *vc4_state;
 318
 319         WARN_ON(plane->state);
 320
 321         vc4_state = kzalloc(sizeof(*vc4_state), GFP_KERNEL);
 322         if (!vc4_state)
 323                 return;
 324
 325         __drm_atomic_helper_plane_reset(plane, &vc4_state->base);
 326 }
 327
 328 static void vc4_dlist_counter_increment(struct vc4_plane_state *vc4_state)
 329 {
 330         if (vc4_state->dlist_count == vc4_state->dlist_size) {
 331                 u32 new_size = max(4u, vc4_state->dlist_count * 2);
 332                 u32 *new_dlist = kmalloc_array(new_size, 4, GFP_KERNEL);
 333
 334                 if (!new_dlist)
 335                         return;
 336                 memcpy(new_dlist, vc4_state->dlist, vc4_state->dlist_count * 4);
 337
 338                 kfree(vc4_state->dlist);
 339                 vc4_state->dlist = new_dlist;
 340                 vc4_state->dlist_size = new_size;
 341         }
 342
 343         vc4_state->dlist_count++;
 344 }
 345
 346 static void vc4_dlist_write(struct vc4_plane_state *vc4_state, u32 val)
 347 {
 348         unsigned int idx = vc4_state->dlist_count;
 349
 350         vc4_dlist_counter_increment(vc4_state);
 351         vc4_state->dlist[idx] = val;
 352 }
 353
 354 /* Returns the scl0/scl1 field based on whether the dimensions need to
 355  * be up/down/non-scaled.
 356  *
 357  * This is a replication of a table from the spec.
 358  */
 359 static u32 vc4_get_scl_field(struct drm_plane_state *state, int plane)
 360 {
 361         struct vc4_plane_state *vc4_state = to_vc4_plane_state(state);
 362
 363         switch (vc4_state->x_scaling[plane] << 2 | vc4_state->y_scaling[plane]) {
 364         case VC4_SCALING_PPF << 2 | VC4_SCALING_PPF:
 365                 return SCALER_CTL0_SCL_H_PPF_V_PPF;
 366         case VC4_SCALING_TPZ << 2 | VC4_SCALING_PPF:
 367                 return SCALER_CTL0_SCL_H_TPZ_V_PPF;
 368         case VC4_SCALING_PPF << 2 | VC4_SCALING_TPZ:
 369                 return SCALER_CTL0_SCL_H_PPF_V_TPZ;
 370         case VC4_SCALING_TPZ << 2 | VC4_SCALING_TPZ:
 371                 return SCALER_CTL0_SCL_H_TPZ_V_TPZ;
 372         case VC4_SCALING_PPF << 2 | VC4_SCALING_NONE:
 373                 return SCALER_CTL0_SCL_H_PPF_V_NONE;
 374         case VC4_SCALING_NONE << 2 | VC4_SCALING_PPF:
 375                 return SCALER_CTL0_SCL_H_NONE_V_PPF;
 376         case VC4_SCALING_NONE << 2 | VC4_SCALING_TPZ:
 377                 return SCALER_CTL0_SCL_H_NONE_V_TPZ;
 378         case VC4_SCALING_TPZ << 2 | VC4_SCALING_NONE:
 379                 return SCALER_CTL0_SCL_H_TPZ_V_NONE;
 380         default:
 381         case VC4_SCALING_NONE << 2 | VC4_SCALING_NONE:
 382                 /* The unity case is independently handled by
 383                  * SCALER_CTL0_UNITY.
 384                  */
 385                 return 0;
 386         }
 387 }
 388
 389 static int vc4_plane_margins_adj(struct drm_plane_state *pstate)
 390 {
 391         struct vc4_plane_state *vc4_pstate = to_vc4_plane_state(pstate);
 392         unsigned int left, right, top, bottom, adjhdisplay, adjvdisplay;
 393         struct drm_crtc_state *crtc_state;
 394
 395         crtc_state = drm_atomic_get_new_crtc_state(pstate->state,
 396                                                    pstate->crtc);
 397
 398         vc4_crtc_get_margins(crtc_state, &left, &right, &top, &bottom);
 399         if (!left && !right && !top && !bottom)
 400                 return 0;
 401
 402         if (left + right >= crtc_state->mode.hdisplay ||
 403             top + bottom >= crtc_state->mode.vdisplay)
 404                 return -EINVAL;
 405
 406         adjhdisplay = crtc_state->mode.hdisplay - (left + right);
 407         vc4_pstate->crtc_x = DIV_ROUND_CLOSEST(vc4_pstate->crtc_x *
 408                                                adjhdisplay,
 409                                                crtc_state->mode.hdisplay);
 410         vc4_pstate->crtc_x += left;
 411         if (vc4_pstate->crtc_x > crtc_state->mode.hdisplay - right)
 412                 vc4_pstate->crtc_x = crtc_state->mode.hdisplay - right;
 413
 414         adjvdisplay = crtc_state->mode.vdisplay - (top + bottom);
 415         vc4_pstate->crtc_y = DIV_ROUND_CLOSEST(vc4_pstate->crtc_y *
 416                                                adjvdisplay,
 417                                                crtc_state->mode.vdisplay);
 418         vc4_pstate->crtc_y += top;
 419         if (vc4_pstate->crtc_y > crtc_state->mode.vdisplay - bottom)
 420                 vc4_pstate->crtc_y = crtc_state->mode.vdisplay - bottom;
 421
 422         vc4_pstate->crtc_w = DIV_ROUND_CLOSEST(vc4_pstate->crtc_w *
 423                                                adjhdisplay,
 424                                                crtc_state->mode.hdisplay);
 425         vc4_pstate->crtc_h = DIV_ROUND_CLOSEST(vc4_pstate->crtc_h *
 426                                                adjvdisplay,
 427                                                crtc_state->mode.vdisplay);
 428
 429         if (!vc4_pstate->crtc_w || !vc4_pstate->crtc_h)
 430                 return -EINVAL;
 431
 432         return 0;
 433 }
 434
 435 static int vc4_plane_setup_clipping_and_scaling(struct drm_plane_state *state)
 436 {
 437         struct vc4_plane_state *vc4_state = to_vc4_plane_state(state);
 438         struct drm_framebuffer *fb = state->fb;
 439         struct drm_gem_cma_object *bo = drm_fb_cma_get_gem_obj(fb, 0);
 440         int num_planes = fb->format->num_planes;
 441         struct drm_crtc_state *crtc_state;
 442         u32 h_subsample = fb->format->hsub;
 443         u32 v_subsample = fb->format->vsub;
 444         int i, ret;
 445
 446         crtc_state = drm_atomic_get_existing_crtc_state(state->state,
 447                                                         state->crtc);
 448         if (!crtc_state) {
 449                 DRM_DEBUG_KMS("Invalid crtc state\n");
 450                 return -EINVAL;
 451         }
 452
 453         ret = drm_atomic_helper_check_plane_state(state, crtc_state, 1,
 454                                                   INT_MAX, true, true);
 455         if (ret)
 456                 return ret;
 457
 458         for (i = 0; i < num_planes; i++)
 459                 vc4_state->offsets[i] = bo->paddr + fb->offsets[i];
 460
 461         vc4_state->src_x = state->src.x1;
 462         vc4_state->src_y = state->src.y1;
 463         vc4_state->src_w[0] = state->src.x2 - vc4_state->src_x;
 464         vc4_state->src_h[0] = state->src.y2 - vc4_state->src_y;
 465
 466         vc4_state->crtc_x = state->dst.x1;
 467         vc4_state->crtc_y = state->dst.y1;
 468         vc4_state->crtc_w = state->dst.x2 - state->dst.x1;
 469         vc4_state->crtc_h = state->dst.y2 - state->dst.y1;
 470
 471         ret = vc4_plane_margins_adj(state);
 472         if (ret)
 473                 return ret;
 474
 475         vc4_state->x_scaling[0] = vc4_get_scaling_mode(vc4_state->src_w[0],
 476                                                        vc4_state->crtc_w);
 477         vc4_state->y_scaling[0] = vc4_get_scaling_mode(vc4_state->src_h[0],
 478                                                        vc4_state->crtc_h);
 479
 480         vc4_state->is_unity = (vc4_state->x_scaling[0] == VC4_SCALING_NONE &&
 481                                vc4_state->y_scaling[0] == VC4_SCALING_NONE);
 482
 483         if (num_planes > 1) {
 484                 vc4_state->is_yuv = true;
 485
 486                 vc4_state->src_w[1] = vc4_state->src_w[0] / h_subsample;
 487                 vc4_state->src_h[1] = vc4_state->src_h[0] / v_subsample;
 488
 489                 vc4_state->x_scaling[1] =
 490                         vc4_get_scaling_mode(vc4_state->src_w[1],
 491                                              vc4_state->crtc_w);
 492                 vc4_state->y_scaling[1] =
 493                         vc4_get_scaling_mode(vc4_state->src_h[1],
 494                                              vc4_state->crtc_h);
 495
 496                 /* YUV conversion requires that horizontal scaling be enabled
 497                  * on the UV plane even if vc4_get_scaling_mode() returned
 498                  * VC4_SCALING_NONE (which can happen when the down-scaling
 499                  * ratio is 0.5). Let's force it to VC4_SCALING_PPF in this
 500                  * case.
 501                  */
 502                 if (vc4_state->x_scaling[1] == VC4_SCALING_NONE)
 503                         vc4_state->x_scaling[1] = VC4_SCALING_PPF;
 504         } else {
 505                 vc4_state->is_yuv = false;
 506                 vc4_state->x_scaling[1] = VC4_SCALING_NONE;
 507                 vc4_state->y_scaling[1] = VC4_SCALING_NONE;
 508         }
 509
 510         return 0;
 511 }
 512
 513 static void vc4_write_tpz(struct vc4_plane_state *vc4_state, u32 src, u32 dst)
 514 {
 515         u32 scale, recip;
 516
 517         scale = src / dst;
 518
 519         /* The specs note that while the reciprocal would be defined
 520          * as (1<<32)/scale, ~0 is close enough.
 521          */
 522         recip = ~0 / scale;
 523
 524         vc4_dlist_write(vc4_state,
 525                         VC4_SET_FIELD(scale, SCALER_TPZ0_SCALE) |
 526                         VC4_SET_FIELD(0, SCALER_TPZ0_IPHASE));
 527         vc4_dlist_write(vc4_state,
 528                         VC4_SET_FIELD(recip, SCALER_TPZ1_RECIP));
 529 }
 530
 531 /* phase magnitude bits */
 532 #define PHASE_BITS 6
 533
 534 static void vc4_write_ppf(struct vc4_plane_state *vc4_state, u32 src, u32 dst, u32 xy, int channel, int chroma_offset)
 535 {
 536         u32 scale = src / dst;
 537         s32 offset, offset2;
 538         s32 phase;
 539
 540         /* Start the phase at 1/2 pixel from the 1st pixel at src_x.
 541            1/4 pixel for YUV, plus the offset for chroma siting */
 542         if (channel) {
 543                 /* the phase is relative to scale_src->x, so shift it for display list's x value */
 544                 offset = (xy & 0x1ffff) >> (16 - PHASE_BITS) >> 1;
 545                 offset -= chroma_offset >> (17 - PHASE_BITS);
 546                 offset += -(1 << PHASE_BITS >> 2);
 547         } else {
 548                 /* the phase is relative to scale_src->x, so shift it for display list's x value */
 549                 offset = (xy & 0xffff) >> (16 - PHASE_BITS);
 550                 offset += -(1 << PHASE_BITS >> 1);
 551
 552                 /* This is a kludge to make sure the scaling factors are consitent with YUV's luma scaling.
 553                    we lose 1bit precision because of this. */
 554                 scale &= ~1;
 555         }
 556
 557         /* There may be a also small error introduced by precision of scale.
 558            Add half of that as a compromise */
 559         offset2 = src - dst * scale;
 560         offset2 >>= 16 - PHASE_BITS;
 561         phase = offset + (offset2 >> 1);
 562
 563         /* Ensure +ve values don't touch the sign bit, then truncate negative values */
 564         if (phase >= 1 << PHASE_BITS)
 565                 phase = (1 << PHASE_BITS) - 1;
 566
 567         phase &= SCALER_PPF_IPHASE_MASK;
 568
 569         vc4_dlist_write(vc4_state,
 570                         SCALER_PPF_AGC |
 571                         VC4_SET_FIELD(scale, SCALER_PPF_SCALE) |
 572                         VC4_SET_FIELD(phase, SCALER_PPF_IPHASE));
 573 }
 574
 575 static u32 vc4_lbm_size(struct drm_plane_state *state)
 576 {
 577         struct vc4_plane_state *vc4_state = to_vc4_plane_state(state);
 578         struct vc4_dev *vc4 = to_vc4_dev(state->plane->dev);
 579         u32 pix_per_line;
 580         u32 lbm;
 581
 582         /* LBM is not needed when there's no vertical scaling. */
 583         if (vc4_state->y_scaling[0] == VC4_SCALING_NONE &&
 584             vc4_state->y_scaling[1] == VC4_SCALING_NONE)
 585                 return 0;
 586
 587         /*
 588          * This can be further optimized in the RGB/YUV444 case if the PPF
 589          * decimation factor is between 0.5 and 1.0 by using crtc_w.
 590          *
 591          * It's not an issue though, since in that case since src_w[0] is going
 592          * to be greater than or equal to crtc_w.
 593          */
 594         if (vc4_state->x_scaling[0] == VC4_SCALING_TPZ)
 595                 pix_per_line = vc4_state->crtc_w;
 596         else
 597                 pix_per_line = vc4_state->src_w[0] >> 16;
 598
 599         if (!vc4_state->is_yuv) {
 600                 if (vc4_state->y_scaling[0] == VC4_SCALING_TPZ)
 601                         lbm = pix_per_line * 8;
 602                 else {
 603                         /* In special cases, this multiplier might be 12. */
 604                         lbm = pix_per_line * 16;
 605                 }
 606         } else {
 607                 /* There are cases for this going down to a multiplier
 608                  * of 2, but according to the firmware source, the
 609                  * table in the docs is somewhat wrong.
 610                  */
 611                 lbm = pix_per_line * 16;
 612         }
 613
 614         /* Align it to 64 or 128 (hvs5) bytes */
 615         lbm = roundup(lbm, vc4->is_vc5 ? 128 : 64);
 616
 617         /* Each "word" of the LBM memory contains 2 or 4 (hvs5) pixels */
 618         lbm /= vc4->is_vc5 ? 4 : 2;
 619
 620         return lbm;
 621 }
 622
 623 static void vc4_write_scaling_parameters(struct drm_plane_state *state,
 624                                          int channel)
 625 {
 626         struct vc4_plane_state *vc4_state = to_vc4_plane_state(state);
 627
 628         /* Ch0 H-PPF Word 0: Scaling Parameters */
 629         if (vc4_state->x_scaling[channel] == VC4_SCALING_PPF) {
 630                 vc4_write_ppf(vc4_state,
 631                               vc4_state->src_w[channel], vc4_state->crtc_w, vc4_state->src_x, channel,
 632                               state->chroma_siting_h);
 633         }
 634
 635         /* Ch0 V-PPF Words 0-1: Scaling Parameters, Context */
 636         if (vc4_state->y_scaling[channel] == VC4_SCALING_PPF) {
 637                 vc4_write_ppf(vc4_state,
 638                               vc4_state->src_h[channel], vc4_state->crtc_h, vc4_state->src_y, channel,
 639                               state->chroma_siting_v);
 640                 vc4_dlist_write(vc4_state, 0xc0c0c0c0);
 641         }
 642
 643         /* Ch0 H-TPZ Words 0-1: Scaling Parameters, Recip */
 644         if (vc4_state->x_scaling[channel] == VC4_SCALING_TPZ) {
 645                 vc4_write_tpz(vc4_state,
 646                               vc4_state->src_w[channel], vc4_state->crtc_w);
 647         }
 648
 649         /* Ch0 V-TPZ Words 0-2: Scaling Parameters, Recip, Context */
 650         if (vc4_state->y_scaling[channel] == VC4_SCALING_TPZ) {
 651                 vc4_write_tpz(vc4_state,
 652                               vc4_state->src_h[channel], vc4_state->crtc_h);
 653                 vc4_dlist_write(vc4_state, 0xc0c0c0c0);
 654         }
 655 }
 656
 657 static void vc4_plane_calc_load(struct drm_plane_state *state)
 658 {
 659         unsigned int hvs_load_shift, vrefresh, i;
 660         struct drm_framebuffer *fb = state->fb;
 661         struct vc4_plane_state *vc4_state;
 662         struct drm_crtc_state *crtc_state;
 663         unsigned int vscale_factor;
 664
 665         vc4_state = to_vc4_plane_state(state);
 666         crtc_state = drm_atomic_get_existing_crtc_state(state->state,
 667                                                         state->crtc);
 668         vrefresh = drm_mode_vrefresh(&crtc_state->adjusted_mode);
 669
 670         /* The HVS is able to process 2 pixels/cycle when scaling the source,
 671          * 4 pixels/cycle otherwise.
 672          * Alpha blending step seems to be pipelined and it's always operating
 673          * at 4 pixels/cycle, so the limiting aspect here seems to be the
 674          * scaler block.
 675          * HVS load is expressed in clk-cycles/sec (AKA Hz).
 676          */
 677         if (vc4_state->x_scaling[0] != VC4_SCALING_NONE ||
 678             vc4_state->x_scaling[1] != VC4_SCALING_NONE ||
 679             vc4_state->y_scaling[0] != VC4_SCALING_NONE ||
 680             vc4_state->y_scaling[1] != VC4_SCALING_NONE)
 681                 hvs_load_shift = 1;
 682         else
 683                 hvs_load_shift = 2;
 684
 685         vc4_state->membus_load = 0;
 686         vc4_state->hvs_load = 0;
 687         for (i = 0; i < fb->format->num_planes; i++) {
 688                 /* Even if the bandwidth/plane required for a single frame is
 689                  *
 690                  * (vc4_state->src_w[i] >> 16) * (vc4_state->src_h[i] >> 16) *
 691                  *  cpp * vrefresh
 692                  *
 693                  * when downscaling, we have to read more pixels per line in
 694                  * the time frame reserved for a single line, so the bandwidth
 695                  * demand can be punctually higher. To account for that, we
 696                  * calculate the down-scaling factor and multiply the plane
 697                  * load by this number. We're likely over-estimating the read
 698                  * demand, but that's better than under-estimating it.
 699                  */
 700                 vscale_factor = DIV_ROUND_UP(vc4_state->src_h[i] >> 16,
 701                                              vc4_state->crtc_h);
 702                 vc4_state->membus_load += (vc4_state->src_w[i] >> 16) *
 703                                           (vc4_state->src_h[i] >> 16) *
 704                                           vscale_factor * fb->format->cpp[i];
 705                 vc4_state->hvs_load += vc4_state->crtc_h * vc4_state->crtc_w;
 706         }
 707
 708         vc4_state->hvs_load *= vrefresh;
 709         vc4_state->hvs_load >>= hvs_load_shift;
 710         vc4_state->membus_load *= vrefresh;
 711 }
 712
 713 static int vc4_plane_allocate_lbm(struct drm_plane_state *state)
 714 {
 715         struct vc4_dev *vc4 = to_vc4_dev(state->plane->dev);
 716         struct vc4_plane_state *vc4_state = to_vc4_plane_state(state);
 717         unsigned long irqflags;
 718         u32 lbm_size;
 719
 720         lbm_size = vc4_lbm_size(state);
 721         if (!lbm_size)
 722                 return 0;
 723
 724         if (WARN_ON(!vc4_state->lbm_offset))
 725                 return -EINVAL;
 726
 727         /* Allocate the LBM memory that the HVS will use for temporary
 728          * storage due to our scaling/format conversion.
 729          */
 730         if (!drm_mm_node_allocated(&vc4_state->lbm)) {
 731                 int ret;
 732
 733                 spin_lock_irqsave(&vc4->hvs->mm_lock, irqflags);
 734                 ret = drm_mm_insert_node_generic(&vc4->hvs->lbm_mm,
 735                                                  &vc4_state->lbm,
 736                                                  lbm_size,
 737                                                  vc4->is_vc5 ? 64 : 32,
 738                                                  0, 0);
 739                 spin_unlock_irqrestore(&vc4->hvs->mm_lock, irqflags);
 740
 741                 if (ret)
 742                         return ret;
 743         } else {
 744                 WARN_ON_ONCE(lbm_size != vc4_state->lbm.size);
 745         }
 746
 747         vc4_state->dlist[vc4_state->lbm_offset] = vc4_state->lbm.start;
 748
 749         return 0;
 750 }
 751
 752 /*
 753  * The colorspace conversion matrices are held in 3 entries in the dlist.
 754  * Create an array of them, with entries for each full and limited mode, and
 755  * each supported colorspace.
 756  */
 757 static const u32 colorspace_coeffs[2][DRM_COLOR_ENCODING_MAX][3] = {
 758         {
 759                 /* Limited range */
 760                 {
 761                         /* BT601 */
 762                         SCALER_CSC0_ITR_R_601_5,
 763                         SCALER_CSC1_ITR_R_601_5,
 764                         SCALER_CSC2_ITR_R_601_5,
 765                 }, {
 766                         /* BT709 */
 767                         SCALER_CSC0_ITR_R_709_3,
 768                         SCALER_CSC1_ITR_R_709_3,
 769                         SCALER_CSC2_ITR_R_709_3,
 770                 }, {
 771                         /* BT2020 */
 772                         SCALER_CSC0_ITR_R_2020,
 773                         SCALER_CSC1_ITR_R_2020,
 774                         SCALER_CSC2_ITR_R_2020,
 775                 }
 776         }, {
 777                 /* Full range */
 778                 {
 779                         /* JFIF */
 780                         SCALER_CSC0_JPEG_JFIF,
 781                         SCALER_CSC1_JPEG_JFIF,
 782                         SCALER_CSC2_JPEG_JFIF,
 783                 }, {
 784                         /* BT709 */
 785                         SCALER_CSC0_ITR_R_709_3_FR,
 786                         SCALER_CSC1_ITR_R_709_3_FR,
 787                         SCALER_CSC2_ITR_R_709_3_FR,
 788                 }, {
 789                         /* BT2020 */
 790                         SCALER_CSC0_ITR_R_2020_FR,
 791                         SCALER_CSC1_ITR_R_2020_FR,
 792                         SCALER_CSC2_ITR_R_2020_FR,
 793                 }
 794         }
 795 };
 796
 797 static u32 vc4_hvs4_get_alpha_blend_mode(struct drm_plane_state *state)
 798 {
 799         if (!state->fb->format->has_alpha)
 800                 return VC4_SET_FIELD(SCALER_POS2_ALPHA_MODE_FIXED,
 801                                      SCALER_POS2_ALPHA_MODE);
 802
 803         switch (state->pixel_blend_mode) {
 804         case DRM_MODE_BLEND_PIXEL_NONE:
 805                 return VC4_SET_FIELD(SCALER_POS2_ALPHA_MODE_FIXED,
 806                                      SCALER_POS2_ALPHA_MODE);
 807         default:
 808         case DRM_MODE_BLEND_PREMULTI:
 809                 return VC4_SET_FIELD(SCALER_POS2_ALPHA_MODE_PIPELINE,
 810                                      SCALER_POS2_ALPHA_MODE) |
 811                         SCALER_POS2_ALPHA_PREMULT;
 812         case DRM_MODE_BLEND_COVERAGE:
 813                 return VC4_SET_FIELD(SCALER_POS2_ALPHA_MODE_PIPELINE,
 814                                      SCALER_POS2_ALPHA_MODE);
 815         }
 816 }
 817
 818 static u32 vc4_hvs5_get_alpha_blend_mode(struct drm_plane_state *state)
 819 {
 820         if (!state->fb->format->has_alpha)
 821                 return VC4_SET_FIELD(SCALER5_CTL2_ALPHA_MODE_FIXED,
 822                                      SCALER5_CTL2_ALPHA_MODE);
 823
 824         switch (state->pixel_blend_mode) {
 825         case DRM_MODE_BLEND_PIXEL_NONE:
 826                 return VC4_SET_FIELD(SCALER5_CTL2_ALPHA_MODE_FIXED,
 827                                      SCALER5_CTL2_ALPHA_MODE);
 828         default:
 829         case DRM_MODE_BLEND_PREMULTI:
 830                 return VC4_SET_FIELD(SCALER5_CTL2_ALPHA_MODE_PIPELINE,
 831                                      SCALER5_CTL2_ALPHA_MODE) |
 832                         SCALER5_CTL2_ALPHA_PREMULT;
 833         case DRM_MODE_BLEND_COVERAGE:
 834                 return VC4_SET_FIELD(SCALER5_CTL2_ALPHA_MODE_PIPELINE,
 835                                      SCALER5_CTL2_ALPHA_MODE);
 836         }
 837 }
 838
 839 /* Writes out a full display list for an active plane to the plane's
 840  * private dlist state.
 841  */
 842 static int vc4_plane_mode_set(struct drm_plane *plane,
 843                               struct drm_plane_state *state)
 844 {
 845         struct vc4_dev *vc4 = to_vc4_dev(plane->dev);
 846         struct vc4_plane_state *vc4_state = to_vc4_plane_state(state);
 847         struct drm_framebuffer *fb = state->fb;
 848         u32 ctl0_offset = vc4_state->dlist_count;
 849         const struct hvs_format *format = vc4_get_hvs_format(fb->format->format);
 850         u64 base_format_mod = fourcc_mod_broadcom_mod(fb->modifier);
 851         int num_planes = fb->format->num_planes;
 852         u32 h_subsample = fb->format->hsub;
 853         u32 v_subsample = fb->format->vsub;
 854         bool mix_plane_alpha;
 855         bool covers_screen;
 856         u32 scl0, scl1, pitch0;
 857         u32 tiling, src_x, src_y;
 858         u32 width, height;
 859         u32 hvs_format = format->hvs;
 860         unsigned int rotation;
 861         int ret, i;
 862
 863         if (vc4_state->dlist_initialized)
 864                 return 0;
 865
 866         ret = vc4_plane_setup_clipping_and_scaling(state);
 867         if (ret)
 868                 return ret;
 869
 870         width = vc4_state->src_w[0] >> 16;
 871         height = vc4_state->src_h[0] >> 16;
 872
 873         /* SCL1 is used for Cb/Cr scaling of planar formats.  For RGB
 874          * and 4:4:4, scl1 should be set to scl0 so both channels of
 875          * the scaler do the same thing.  For YUV, the Y plane needs
 876          * to be put in channel 1 and Cb/Cr in channel 0, so we swap
 877          * the scl fields here.
 878          */
 879         if (num_planes == 1) {
 880                 scl0 = vc4_get_scl_field(state, 0);
 881                 scl1 = scl0;
 882         } else {
 883                 scl0 = vc4_get_scl_field(state, 1);
 884                 scl1 = vc4_get_scl_field(state, 0);
 885         }
 886
 887         rotation = drm_rotation_simplify(state->rotation,
 888                                          DRM_MODE_ROTATE_0 |
 889                                          DRM_MODE_REFLECT_X |
 890                                          DRM_MODE_REFLECT_Y);
 891
 892         /* We must point to the last line when Y reflection is enabled. */
 893         src_y = vc4_state->src_y >> 16;
 894         if (rotation & DRM_MODE_REFLECT_Y)
 895                 src_y += height - 1;
 896
 897         src_x = vc4_state->src_x >> 16;
 898
 899         switch (base_format_mod) {
 900         case DRM_FORMAT_MOD_LINEAR:
 901                 tiling = SCALER_CTL0_TILING_LINEAR;
 902                 pitch0 = VC4_SET_FIELD(fb->pitches[0], SCALER_SRC_PITCH);
 903
 904                 /* Adjust the base pointer to the first pixel to be scanned
 905                  * out.
 906                  */
 907                 for (i = 0; i < num_planes; i++) {
 908                         vc4_state->offsets[i] += src_y /
 909                                                  (i ? v_subsample : 1) *
 910                                                  fb->pitches[i];
 911
 912                         vc4_state->offsets[i] += src_x /
 913                                                  (i ? h_subsample : 1) *
 914                                                  fb->format->cpp[i];
 915                 }
 916
 917                 break;
 918
 919         case DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED: {
 920                 u32 tile_size_shift = 12; /* T tiles are 4kb */
 921                 /* Whole-tile offsets, mostly for setting the pitch. */
 922                 u32 tile_w_shift = fb->format->cpp[0] == 2 ? 6 : 5;
 923                 u32 tile_h_shift = 5; /* 16 and 32bpp are 32 pixels high */
 924                 u32 tile_w_mask = (1 << tile_w_shift) - 1;
 925                 /* The height mask on 32-bit-per-pixel tiles is 63, i.e. twice
 926                  * the height (in pixels) of a 4k tile.
 927                  */
 928                 u32 tile_h_mask = (2 << tile_h_shift) - 1;
 929                 /* For T-tiled, the FB pitch is "how many bytes from one row to
 930                  * the next, such that
 931                  *
 932                  *      pitch * tile_h == tile_size * tiles_per_row
 933                  */
 934                 u32 tiles_w = fb->pitches[0] >> (tile_size_shift - tile_h_shift);
 935                 u32 tiles_l = src_x >> tile_w_shift;
 936                 u32 tiles_r = tiles_w - tiles_l;
 937                 u32 tiles_t = src_y >> tile_h_shift;
 938                 /* Intra-tile offsets, which modify the base address (the
 939                  * SCALER_PITCH0_TILE_Y_OFFSET tells HVS how to walk from that
 940                  * base address).
 941                  */
 942                 u32 tile_y = (src_y >> 4) & 1;
 943                 u32 subtile_y = (src_y >> 2) & 3;
 944                 u32 utile_y = src_y & 3;
 945                 u32 x_off = src_x & tile_w_mask;
 946                 u32 y_off = src_y & tile_h_mask;
 947
 948                 /* When Y reflection is requested we must set the
 949                  * SCALER_PITCH0_TILE_LINE_DIR flag to tell HVS that all lines
 950                  * after the initial one should be fetched in descending order,
 951                  * which makes sense since we start from the last line and go
 952                  * backward.
 953                  * Don't know why we need y_off = max_y_off - y_off, but it's
 954                  * definitely required (I guess it's also related to the "going
 955                  * backward" situation).
 956                  */
 957                 if (rotation & DRM_MODE_REFLECT_Y) {
 958                         y_off = tile_h_mask - y_off;
 959                         pitch0 = SCALER_PITCH0_TILE_LINE_DIR;
 960                 } else {
 961                         pitch0 = 0;
 962                 }
 963
 964                 tiling = SCALER_CTL0_TILING_256B_OR_T;
 965                 pitch0 |= (VC4_SET_FIELD(x_off, SCALER_PITCH0_SINK_PIX) |
 966                            VC4_SET_FIELD(y_off, SCALER_PITCH0_TILE_Y_OFFSET) |
 967                            VC4_SET_FIELD(tiles_l, SCALER_PITCH0_TILE_WIDTH_L) |
 968                            VC4_SET_FIELD(tiles_r, SCALER_PITCH0_TILE_WIDTH_R));
 969                 vc4_state->offsets[0] += tiles_t * (tiles_w << tile_size_shift);
 970                 vc4_state->offsets[0] += subtile_y << 8;
 971                 vc4_state->offsets[0] += utile_y << 4;
 972
 973                 /* Rows of tiles alternate left-to-right and right-to-left. */
 974                 if (tiles_t & 1) {
 975                         pitch0 |= SCALER_PITCH0_TILE_INITIAL_LINE_DIR;
 976                         vc4_state->offsets[0] += (tiles_w - tiles_l) <<
 977                                                  tile_size_shift;
 978                         vc4_state->offsets[0] -= (1 + !tile_y) << 10;
 979                 } else {
 980                         vc4_state->offsets[0] += tiles_l << tile_size_shift;
 981                         vc4_state->offsets[0] += tile_y << 10;
 982                 }
 983
 984                 break;
 985         }
 986
 987         case DRM_FORMAT_MOD_BROADCOM_SAND64:
 988         case DRM_FORMAT_MOD_BROADCOM_SAND128:
 989         case DRM_FORMAT_MOD_BROADCOM_SAND256: {
 990                 uint32_t param = fourcc_mod_broadcom_param(fb->modifier);
 991
 992                 if (param > SCALER_TILE_HEIGHT_MASK) {
 993                         DRM_DEBUG_KMS("SAND height too large (%d)\n",
 994                                       param);
 995                         return -EINVAL;
 996                 }
 997
 998                 if (fb->format->format == DRM_FORMAT_P030) {
 999                         hvs_format = HVS_PIXEL_FORMAT_YCBCR_10BIT;
1000                         tiling = SCALER_CTL0_TILING_128B;
1001                 } else {
1002                         hvs_format = HVS_PIXEL_FORMAT_H264;
1003
1004                         switch (base_format_mod) {
1005                         case DRM_FORMAT_MOD_BROADCOM_SAND64:
1006                                 tiling = SCALER_CTL0_TILING_64B;
1007                                 break;
1008                         case DRM_FORMAT_MOD_BROADCOM_SAND128:
1009                                 tiling = SCALER_CTL0_TILING_128B;
1010                                 break;
1011                         case DRM_FORMAT_MOD_BROADCOM_SAND256:
1012                                 tiling = SCALER_CTL0_TILING_256B_OR_T;
1013                                 break;
1014                         default:
1015                                 return -EINVAL;
1016                         }
1017                 }
1018
1019                 /* Adjust the base pointer to the first pixel to be scanned
1020                  * out.
1021                  *
1022                  * For P030, y_ptr [31:4] is the 128bit word for the start pixel
1023                  * y_ptr [3:0] is the pixel (0-11) contained within that 128bit
1024                  * word that should be taken as the first pixel.
1025                  * Ditto uv_ptr [31:4] vs [3:0], however [3:0] contains the
1026                  * element within the 128bit word, eg for pixel 3 the value
1027                  * should be 6.
1028                  */
1029                 for (i = 0; i < num_planes; i++) {
1030                         u32 tile_w, tile, x_off, pix_per_tile;
1031
1032                         if (fb->format->format == DRM_FORMAT_P030) {
1033                                 /*
1034                                  * Spec says: bits [31:4] of the given address
1035                                  * should point to the 128-bit word containing
1036                                  * the desired starting pixel, and bits[3:0]
1037                                  * should be between 0 and 11, indicating which
1038                                  * of the 12-pixels in that 128-bit word is the
1039                                  * first pixel to be used
1040                                  */
1041                                 u32 remaining_pixels = src_x % 96;
1042                                 u32 aligned = remaining_pixels / 12;
1043                                 u32 last_bits = remaining_pixels % 12;
1044
1045                                 x_off = aligned * 16 + last_bits;
1046                                 tile_w = 128;
1047                                 pix_per_tile = 96;
1048                         } else {
1049                                 switch (base_format_mod) {
1050                                 case DRM_FORMAT_MOD_BROADCOM_SAND64:
1051                                         tile_w = 64;
1052                                         break;
1053                                 case DRM_FORMAT_MOD_BROADCOM_SAND128:
1054                                         tile_w = 128;
1055                                         break;
1056                                 case DRM_FORMAT_MOD_BROADCOM_SAND256:
1057                                         tile_w = 256;
1058                                         break;
1059                                 default:
1060                                         return -EINVAL;
1061                                 }
1062                                 pix_per_tile = tile_w / fb->format->cpp[0];
1063                                 x_off = (src_x % pix_per_tile) /
1064                                         (i ? h_subsample : 1) *
1065                                         fb->format->cpp[i];
1066                         }
1067
1068                         tile = src_x / pix_per_tile;
1069
1070                         vc4_state->offsets[i] += param * tile_w * tile;
1071                         vc4_state->offsets[i] += src_y /
1072                                                  (i ? v_subsample : 1) *
1073                                                  tile_w;
1074                         vc4_state->offsets[i] += x_off & ~(i ? 1 : 0);
1075                 }
1076
1077                 pitch0 = VC4_SET_FIELD(param, SCALER_TILE_HEIGHT);
1078                 break;
1079         }
1080
1081         default:
1082                 DRM_DEBUG_KMS("Unsupported FB tiling flag 0x%16llx",
1083                               (long long)fb->modifier);
1084                 return -EINVAL;
1085         }
1086
1087         /* fetch an extra pixel if we don't actually line up with the left edge. */
1088         if ((vc4_state->src_x & 0xffff) && vc4_state->src_x < (state->fb->width << 16))
1089                 width++;
1090
1091         /* same for the right side */
1092         if (((vc4_state->src_x + vc4_state->src_w[0]) & 0xffff) &&
1093                vc4_state->src_x + vc4_state->src_w[0] < (state->fb->width << 16))
1094                 width++;
1095
1096         /* now for the top */
1097         if ((vc4_state->src_y & 0xffff) && vc4_state->src_y < (state->fb->height << 16))
1098                 height++;
1099
1100         /* and the bottom */
1101         if (((vc4_state->src_y + vc4_state->src_h[0]) & 0xffff) &&
1102                vc4_state->src_y + vc4_state->src_h[0] < (state->fb->height << 16))
1103                 height++;
1104
1105         /* Don't waste cycles mixing with plane alpha if the set alpha
1106          * is opaque or there is no per-pixel alpha information.
1107          * In any case we use the alpha property value as the fixed alpha.
1108          */
1109         mix_plane_alpha = state->alpha != DRM_BLEND_ALPHA_OPAQUE &&
1110                           fb->format->has_alpha;
1111
1112         if (!vc4->is_vc5) {
1113         /* Control word */
1114                 vc4_dlist_write(vc4_state,
1115                                 SCALER_CTL0_VALID |
1116                                 (rotation & DRM_MODE_REFLECT_X ? SCALER_CTL0_HFLIP : 0) |
1117                                 (rotation & DRM_MODE_REFLECT_Y ? SCALER_CTL0_VFLIP : 0) |
1118                                 VC4_SET_FIELD(SCALER_CTL0_RGBA_EXPAND_ROUND, SCALER_CTL0_RGBA_EXPAND) |
1119                                 (format->pixel_order << SCALER_CTL0_ORDER_SHIFT) |
1120                                 (hvs_format << SCALER_CTL0_PIXEL_FORMAT_SHIFT) |
1121                                 VC4_SET_FIELD(tiling, SCALER_CTL0_TILING) |
1122                                 (vc4_state->is_unity ? SCALER_CTL0_UNITY : 0) |
1123                                 VC4_SET_FIELD(scl0, SCALER_CTL0_SCL0) |
1124                                 VC4_SET_FIELD(scl1, SCALER_CTL0_SCL1));
1125
1126                 /* Position Word 0: Image Positions and Alpha Value */
1127                 vc4_state->pos0_offset = vc4_state->dlist_count;
1128                 vc4_dlist_write(vc4_state,
1129                                 VC4_SET_FIELD(state->alpha >> 8, SCALER_POS0_FIXED_ALPHA) |
1130                                 VC4_SET_FIELD(vc4_state->crtc_x, SCALER_POS0_START_X) |
1131                                 VC4_SET_FIELD(vc4_state->crtc_y, SCALER_POS0_START_Y));
1132
1133                 /* Position Word 1: Scaled Image Dimensions. */
1134                 if (!vc4_state->is_unity) {
1135                         vc4_dlist_write(vc4_state,
1136                                         VC4_SET_FIELD(vc4_state->crtc_w,
1137                                                       SCALER_POS1_SCL_WIDTH) |
1138                                         VC4_SET_FIELD(vc4_state->crtc_h,
1139                                                       SCALER_POS1_SCL_HEIGHT));
1140                 }
1141
1142                 /* Position Word 2: Source Image Size, Alpha */
1143                 vc4_state->pos2_offset = vc4_state->dlist_count;
1144                 vc4_dlist_write(vc4_state,
1145                                 (mix_plane_alpha ? SCALER_POS2_ALPHA_MIX : 0) |
1146                                 vc4_hvs4_get_alpha_blend_mode(state) |
1147                                 VC4_SET_FIELD(width, SCALER_POS2_WIDTH) |
1148                                 VC4_SET_FIELD(height, SCALER_POS2_HEIGHT));
1149
1150                 /* Position Word 3: Context.  Written by the HVS. */
1151                 vc4_dlist_write(vc4_state, 0xc0c0c0c0);
1152
1153         } else {
1154                 /* Control word */
1155                 vc4_dlist_write(vc4_state,
1156                                 SCALER_CTL0_VALID |
1157                                 (format->pixel_order_hvs5 << SCALER_CTL0_ORDER_SHIFT) |
1158                                 (hvs_format << SCALER_CTL0_PIXEL_FORMAT_SHIFT) |
1159                                 VC4_SET_FIELD(tiling, SCALER_CTL0_TILING) |
1160                                 (vc4_state->is_unity ?
1161                                                 SCALER5_CTL0_UNITY : 0) |
1162                                 VC4_SET_FIELD(scl0, SCALER_CTL0_SCL0) |
1163                                 VC4_SET_FIELD(scl1, SCALER_CTL0_SCL1) |
1164                                 SCALER5_CTL0_ALPHA_EXPAND |
1165                                 SCALER5_CTL0_RGB_EXPAND);
1166
1167                 /* Position Word 0: Image Positions and Alpha Value */
1168                 vc4_state->pos0_offset = vc4_state->dlist_count;
1169                 vc4_dlist_write(vc4_state,
1170                                 (rotation & DRM_MODE_REFLECT_Y ?
1171                                                 SCALER5_POS0_VFLIP : 0) |
1172                                 VC4_SET_FIELD(vc4_state->crtc_x,
1173                                               SCALER_POS0_START_X) |
1174                                 (rotation & DRM_MODE_REFLECT_X ?
1175                                               SCALER5_POS0_HFLIP : 0) |
1176                                 VC4_SET_FIELD(vc4_state->crtc_y,
1177                                               SCALER5_POS0_START_Y)
1178                                );
1179
1180                 /* Control Word 2 */
1181                 vc4_dlist_write(vc4_state,
1182                                 VC4_SET_FIELD(state->alpha >> 4,
1183                                               SCALER5_CTL2_ALPHA) |
1184                                 vc4_hvs5_get_alpha_blend_mode(state) |
1185                                 (mix_plane_alpha ?
1186                                         SCALER5_CTL2_ALPHA_MIX : 0)
1187                                );
1188
1189                 /* Position Word 1: Scaled Image Dimensions. */
1190                 if (!vc4_state->is_unity) {
1191                         vc4_dlist_write(vc4_state,
1192                                         VC4_SET_FIELD(vc4_state->crtc_w,
1193                                                       SCALER5_POS1_SCL_WIDTH) |
1194                                         VC4_SET_FIELD(vc4_state->crtc_h,
1195                                                       SCALER5_POS1_SCL_HEIGHT));
1196                 }
1197
1198                 /* Position Word 2: Source Image Size */
1199                 vc4_state->pos2_offset = vc4_state->dlist_count;
1200                 vc4_dlist_write(vc4_state,
1201                                 VC4_SET_FIELD(width, SCALER5_POS2_WIDTH) |
1202                                 VC4_SET_FIELD(height, SCALER5_POS2_HEIGHT));
1203
1204                 /* Position Word 3: Context.  Written by the HVS. */
1205                 vc4_dlist_write(vc4_state, 0xc0c0c0c0);
1206         }
1207
1208
1209         /* Pointer Word 0/1/2: RGB / Y / Cb / Cr Pointers
1210          *
1211          * The pointers may be any byte address.
1212          */
1213         vc4_state->ptr0_offset = vc4_state->dlist_count;
1214         for (i = 0; i < num_planes; i++)
1215                 vc4_dlist_write(vc4_state, vc4_state->offsets[i]);
1216
1217         /* Pointer Context Word 0/1/2: Written by the HVS */
1218         for (i = 0; i < num_planes; i++)
1219                 vc4_dlist_write(vc4_state, 0xc0c0c0c0);
1220
1221         /* Pitch word 0 */
1222         vc4_dlist_write(vc4_state, pitch0);
1223
1224         /* Pitch word 1/2 */
1225         for (i = 1; i < num_planes; i++) {
1226                 if (hvs_format != HVS_PIXEL_FORMAT_H264 &&
1227                     hvs_format != HVS_PIXEL_FORMAT_YCBCR_10BIT) {
1228                         vc4_dlist_write(vc4_state,
1229                                         VC4_SET_FIELD(fb->pitches[i],
1230                                                       SCALER_SRC_PITCH));
1231                 } else {
1232                         vc4_dlist_write(vc4_state, pitch0);
1233                 }
1234         }
1235
1236         /* Colorspace conversion words */
1237         if (vc4_state->is_yuv) {
1238                 enum drm_color_encoding color_encoding = state->color_encoding;
1239                 enum drm_color_range color_range = state->color_range;
1240                 const u32 *ccm;
1241
1242                 if (color_encoding >= DRM_COLOR_ENCODING_MAX)
1243                         color_encoding = DRM_COLOR_YCBCR_BT601;
1244                 if (color_range >= DRM_COLOR_RANGE_MAX)
1245                         color_range = DRM_COLOR_YCBCR_LIMITED_RANGE;
1246
1247                 ccm = colorspace_coeffs[color_range][color_encoding];
1248
1249                 vc4_dlist_write(vc4_state, ccm[0]);
1250                 vc4_dlist_write(vc4_state, ccm[1]);
1251                 vc4_dlist_write(vc4_state, ccm[2]);
1252         }
1253
1254         vc4_state->lbm_offset = 0;
1255
1256         if (vc4_state->x_scaling[0] != VC4_SCALING_NONE ||
1257             vc4_state->x_scaling[1] != VC4_SCALING_NONE ||
1258             vc4_state->y_scaling[0] != VC4_SCALING_NONE ||
1259             vc4_state->y_scaling[1] != VC4_SCALING_NONE) {
1260                 /* Reserve a slot for the LBM Base Address. The real value will
1261                  * be set when calling vc4_plane_allocate_lbm().
1262                  */
1263                 if (vc4_state->y_scaling[0] != VC4_SCALING_NONE ||
1264                     vc4_state->y_scaling[1] != VC4_SCALING_NONE) {
1265                         vc4_state->lbm_offset = vc4_state->dlist_count;
1266                         vc4_dlist_counter_increment(vc4_state);
1267                 }
1268
1269                 if (num_planes > 1) {
1270                         /* Emit Cb/Cr as channel 0 and Y as channel
1271                          * 1. This matches how we set up scl0/scl1
1272                          * above.
1273                          */
1274                         vc4_write_scaling_parameters(state, 1);
1275                 }
1276                 vc4_write_scaling_parameters(state, 0);
1277
1278                 /* If any PPF setup was done, then all the kernel
1279                  * pointers get uploaded.
1280                  */
1281                 if (vc4_state->x_scaling[0] == VC4_SCALING_PPF ||
1282                     vc4_state->y_scaling[0] == VC4_SCALING_PPF ||
1283                     vc4_state->x_scaling[1] == VC4_SCALING_PPF ||
1284                     vc4_state->y_scaling[1] == VC4_SCALING_PPF) {
1285                         u32 kernel = VC4_SET_FIELD(vc4->hvs->mitchell_netravali_filter.start,
1286                                                    SCALER_PPF_KERNEL_OFFSET);
1287
1288                         /* HPPF plane 0 */
1289                         vc4_dlist_write(vc4_state, kernel);
1290                         /* VPPF plane 0 */
1291                         vc4_dlist_write(vc4_state, kernel);
1292                         /* HPPF plane 1 */
1293                         vc4_dlist_write(vc4_state, kernel);
1294                         /* VPPF plane 1 */
1295                         vc4_dlist_write(vc4_state, kernel);
1296                 }
1297         }
1298
1299         vc4_state->dlist[ctl0_offset] |=
1300                 VC4_SET_FIELD(vc4_state->dlist_count, SCALER_CTL0_SIZE);
1301
1302         /* crtc_* are already clipped coordinates. */
1303         covers_screen = vc4_state->crtc_x == 0 && vc4_state->crtc_y == 0 &&
1304                         vc4_state->crtc_w == state->crtc->mode.hdisplay &&
1305                         vc4_state->crtc_h == state->crtc->mode.vdisplay;
1306         /* Background fill might be necessary when the plane has per-pixel
1307          * alpha content or a non-opaque plane alpha and could blend from the
1308          * background or does not cover the entire screen.
1309          */
1310         vc4_state->needs_bg_fill = fb->format->has_alpha || !covers_screen ||
1311                                    state->alpha != DRM_BLEND_ALPHA_OPAQUE;
1312
1313         /* Flag the dlist as initialized to avoid checking it twice in case
1314          * the async update check already called vc4_plane_mode_set() and
1315          * decided to fallback to sync update because async update was not
1316          * possible.
1317          */
1318         vc4_state->dlist_initialized = 1;
1319
1320         vc4_plane_calc_load(state);
1321
1322         return 0;
1323 }
1324
1325 /* If a modeset involves changing the setup of a plane, the atomic
1326  * infrastructure will call this to validate a proposed plane setup.
1327  * However, if a plane isn't getting updated, this (and the
1328  * corresponding vc4_plane_atomic_update) won't get called.  Thus, we
1329  * compute the dlist here and have all active plane dlists get updated
1330  * in the CRTC's flush.
1331  */
1332 static int vc4_plane_atomic_check(struct drm_plane *plane,
1333                                   struct drm_atomic_state *state)
1334 {
1335         struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
1336                                                                                  plane);
1337         struct vc4_plane_state *vc4_state = to_vc4_plane_state(new_plane_state);
1338         int ret;
1339
1340         vc4_state->dlist_count = 0;
1341
1342         if (!plane_enabled(new_plane_state))
1343                 return 0;
1344
1345         ret = vc4_plane_mode_set(plane, new_plane_state);
1346         if (ret)
1347                 return ret;
1348
1349         return vc4_plane_allocate_lbm(new_plane_state);
1350 }
1351
1352 static void vc4_plane_atomic_update(struct drm_plane *plane,
1353                                     struct drm_atomic_state *state)
1354 {
1355         /* No contents here.  Since we don't know where in the CRTC's
1356          * dlist we should be stored, our dlist is uploaded to the
1357          * hardware with vc4_plane_write_dlist() at CRTC atomic_flush
1358          * time.
1359          */
1360 }
1361
1362 u32 vc4_plane_write_dlist(struct drm_plane *plane, u32 __iomem *dlist)
1363 {
1364         struct vc4_plane_state *vc4_state = to_vc4_plane_state(plane->state);
1365         int i;
1366
1367         vc4_state->hw_dlist = dlist;
1368
1369         /* Can't memcpy_toio() because it needs to be 32-bit writes. */
1370         for (i = 0; i < vc4_state->dlist_count; i++)
1371                 writel(vc4_state->dlist[i], &dlist[i]);
1372
1373         return vc4_state->dlist_count;
1374 }
1375
1376 u32 vc4_plane_dlist_size(const struct drm_plane_state *state)
1377 {
1378         const struct vc4_plane_state *vc4_state =
1379                 container_of(state, typeof(*vc4_state), base);
1380
1381         return vc4_state->dlist_count;
1382 }
1383
1384 /* Updates the plane to immediately (well, once the FIFO needs
1385  * refilling) scan out from at a new framebuffer.
1386  */
1387 void vc4_plane_async_set_fb(struct drm_plane *plane, struct drm_framebuffer *fb)
1388 {
1389         struct vc4_plane_state *vc4_state = to_vc4_plane_state(plane->state);
1390         struct drm_gem_cma_object *bo = drm_fb_cma_get_gem_obj(fb, 0);
1391         uint32_t addr;
1392
1393         /* We're skipping the address adjustment for negative origin,
1394          * because this is only called on the primary plane.
1395          */
1396         WARN_ON_ONCE(plane->state->crtc_x < 0 || plane->state->crtc_y < 0);
1397         addr = bo->paddr + fb->offsets[0];
1398
1399         /* Write the new address into the hardware immediately.  The
1400          * scanout will start from this address as soon as the FIFO
1401          * needs to refill with pixels.
1402          */
1403         writel(addr, &vc4_state->hw_dlist[vc4_state->ptr0_offset]);
1404
1405         /* Also update the CPU-side dlist copy, so that any later
1406          * atomic updates that don't do a new modeset on our plane
1407          * also use our updated address.
1408          */
1409         vc4_state->dlist[vc4_state->ptr0_offset] = addr;
1410 }
1411
1412 static void vc4_plane_atomic_async_update(struct drm_plane *plane,
1413                                           struct drm_atomic_state *state)
1414 {
1415         struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
1416                                                                                  plane);
1417         struct vc4_plane_state *vc4_state, *new_vc4_state;
1418
1419         swap(plane->state->fb, new_plane_state->fb);
1420         plane->state->crtc_x = new_plane_state->crtc_x;
1421         plane->state->crtc_y = new_plane_state->crtc_y;
1422         plane->state->crtc_w = new_plane_state->crtc_w;
1423         plane->state->crtc_h = new_plane_state->crtc_h;
1424         plane->state->src_x = new_plane_state->src_x;
1425         plane->state->src_y = new_plane_state->src_y;
1426         plane->state->src_w = new_plane_state->src_w;
1427         plane->state->src_h = new_plane_state->src_h;
1428         plane->state->alpha = new_plane_state->alpha;
1429         plane->state->pixel_blend_mode = new_plane_state->pixel_blend_mode;
1430         plane->state->rotation = new_plane_state->rotation;
1431         plane->state->zpos = new_plane_state->zpos;
1432         plane->state->normalized_zpos = new_plane_state->normalized_zpos;
1433         plane->state->color_encoding = new_plane_state->color_encoding;
1434         plane->state->color_range = new_plane_state->color_range;
1435         plane->state->src = new_plane_state->src;
1436         plane->state->dst = new_plane_state->dst;
1437         plane->state->visible = new_plane_state->visible;
1438
1439         new_vc4_state = to_vc4_plane_state(new_plane_state);
1440         vc4_state = to_vc4_plane_state(plane->state);
1441
1442         vc4_state->crtc_x = new_vc4_state->crtc_x;
1443         vc4_state->crtc_y = new_vc4_state->crtc_y;
1444         vc4_state->crtc_h = new_vc4_state->crtc_h;
1445         vc4_state->crtc_w = new_vc4_state->crtc_w;
1446         vc4_state->src_x = new_vc4_state->src_x;
1447         vc4_state->src_y = new_vc4_state->src_y;
1448         memcpy(vc4_state->src_w, new_vc4_state->src_w,
1449                sizeof(vc4_state->src_w));
1450         memcpy(vc4_state->src_h, new_vc4_state->src_h,
1451                sizeof(vc4_state->src_h));
1452         memcpy(vc4_state->x_scaling, new_vc4_state->x_scaling,
1453                sizeof(vc4_state->x_scaling));
1454         memcpy(vc4_state->y_scaling, new_vc4_state->y_scaling,
1455                sizeof(vc4_state->y_scaling));
1456         vc4_state->is_unity = new_vc4_state->is_unity;
1457         vc4_state->is_yuv = new_vc4_state->is_yuv;
1458         memcpy(vc4_state->offsets, new_vc4_state->offsets,
1459                sizeof(vc4_state->offsets));
1460         vc4_state->needs_bg_fill = new_vc4_state->needs_bg_fill;
1461
1462         /* Update the current vc4_state pos0, pos2 and ptr0 dlist entries. */
1463         vc4_state->dlist[vc4_state->pos0_offset] =
1464                 new_vc4_state->dlist[vc4_state->pos0_offset];
1465         vc4_state->dlist[vc4_state->pos2_offset] =
1466                 new_vc4_state->dlist[vc4_state->pos2_offset];
1467         vc4_state->dlist[vc4_state->ptr0_offset] =
1468                 new_vc4_state->dlist[vc4_state->ptr0_offset];
1469
1470         /* Note that we can't just call vc4_plane_write_dlist()
1471          * because that would smash the context data that the HVS is
1472          * currently using.
1473          */
1474         writel(vc4_state->dlist[vc4_state->pos0_offset],
1475                &vc4_state->hw_dlist[vc4_state->pos0_offset]);
1476         writel(vc4_state->dlist[vc4_state->pos2_offset],
1477                &vc4_state->hw_dlist[vc4_state->pos2_offset]);
1478         writel(vc4_state->dlist[vc4_state->ptr0_offset],
1479                &vc4_state->hw_dlist[vc4_state->ptr0_offset]);
1480 }
1481
1482 static int vc4_plane_atomic_async_check(struct drm_plane *plane,
1483                                         struct drm_atomic_state *state)
1484 {
1485         struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
1486                                                                                  plane);
1487         struct vc4_plane_state *old_vc4_state, *new_vc4_state;
1488         int ret;
1489         u32 i;
1490
1491         ret = vc4_plane_mode_set(plane, new_plane_state);
1492         if (ret)
1493                 return ret;
1494
1495         old_vc4_state = to_vc4_plane_state(plane->state);
1496         new_vc4_state = to_vc4_plane_state(new_plane_state);
1497
1498         if (!new_vc4_state->hw_dlist)
1499                 return -EINVAL;
1500
1501         if (old_vc4_state->dlist_count != new_vc4_state->dlist_count ||
1502             old_vc4_state->pos0_offset != new_vc4_state->pos0_offset ||
1503             old_vc4_state->pos2_offset != new_vc4_state->pos2_offset ||
1504             old_vc4_state->ptr0_offset != new_vc4_state->ptr0_offset ||
1505             vc4_lbm_size(plane->state) != vc4_lbm_size(new_plane_state))
1506                 return -EINVAL;
1507
1508         /* Only pos0, pos2 and ptr0 DWORDS can be updated in an async update
1509          * if anything else has changed, fallback to a sync update.
1510          */
1511         for (i = 0; i < new_vc4_state->dlist_count; i++) {
1512                 if (i == new_vc4_state->pos0_offset ||
1513                     i == new_vc4_state->pos2_offset ||
1514                     i == new_vc4_state->ptr0_offset ||
1515                     (new_vc4_state->lbm_offset &&
1516                      i == new_vc4_state->lbm_offset))
1517                         continue;
1518
1519                 if (new_vc4_state->dlist[i] != old_vc4_state->dlist[i])
1520                         return -EINVAL;
1521         }
1522
1523         return 0;
1524 }
1525
1526 static int vc4_prepare_fb(struct drm_plane *plane,
1527                           struct drm_plane_state *state)
1528 {
1529         struct vc4_bo *bo;
1530         int ret;
1531
1532         if (!state->fb)
1533                 return 0;
1534
1535         bo = to_vc4_bo(&drm_fb_cma_get_gem_obj(state->fb, 0)->base);
1536
1537         drm_gem_plane_helper_prepare_fb(plane, state);
1538
1539         if (plane->state->fb == state->fb)
1540                 return 0;
1541
1542         ret = vc4_bo_inc_usecnt(bo);
1543         if (ret)
1544                 return ret;
1545
1546         return 0;
1547 }
1548
1549 static void vc4_cleanup_fb(struct drm_plane *plane,
1550                            struct drm_plane_state *state)
1551 {
1552         struct vc4_bo *bo;
1553
1554         if (plane->state->fb == state->fb || !state->fb)
1555                 return;
1556
1557         bo = to_vc4_bo(&drm_fb_cma_get_gem_obj(state->fb, 0)->base);
1558         vc4_bo_dec_usecnt(bo);
1559 }
1560
1561 static const struct drm_plane_helper_funcs vc4_plane_helper_funcs = {
1562         .atomic_check = vc4_plane_atomic_check,
1563         .atomic_update = vc4_plane_atomic_update,
1564         .prepare_fb = vc4_prepare_fb,
1565         .cleanup_fb = vc4_cleanup_fb,
1566         .atomic_async_check = vc4_plane_atomic_async_check,
1567         .atomic_async_update = vc4_plane_atomic_async_update,
1568 };
1569
1570 static const struct drm_plane_helper_funcs vc5_plane_helper_funcs = {
1571         .atomic_check = vc4_plane_atomic_check,
1572         .atomic_update = vc4_plane_atomic_update,
1573         .atomic_async_check = vc4_plane_atomic_async_check,
1574         .atomic_async_update = vc4_plane_atomic_async_update,
1575 };
1576
1577 static bool vc4_format_mod_supported(struct drm_plane *plane,
1578                                      uint32_t format,
1579                                      uint64_t modifier)
1580 {
1581         /* Support T_TILING for RGB formats only. */
1582         switch (format) {
1583         case DRM_FORMAT_XRGB8888:
1584         case DRM_FORMAT_ARGB8888:
1585         case DRM_FORMAT_ABGR8888:
1586         case DRM_FORMAT_XBGR8888:
1587         case DRM_FORMAT_RGB565:
1588         case DRM_FORMAT_BGR565:
1589         case DRM_FORMAT_ARGB1555:
1590         case DRM_FORMAT_XRGB1555:
1591                 switch (fourcc_mod_broadcom_mod(modifier)) {
1592                 case DRM_FORMAT_MOD_LINEAR:
1593                 case DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED:
1594                         return true;
1595                 default:
1596                         return false;
1597                 }
1598         case DRM_FORMAT_NV12:
1599         case DRM_FORMAT_NV21:
1600                 switch (fourcc_mod_broadcom_mod(modifier)) {
1601                 case DRM_FORMAT_MOD_LINEAR:
1602                 case DRM_FORMAT_MOD_BROADCOM_SAND64:
1603                 case DRM_FORMAT_MOD_BROADCOM_SAND128:
1604                 case DRM_FORMAT_MOD_BROADCOM_SAND256:
1605                         return true;
1606                 default:
1607                         return false;
1608                 }
1609         case DRM_FORMAT_P030:
1610                 switch (fourcc_mod_broadcom_mod(modifier)) {
1611                 case DRM_FORMAT_MOD_BROADCOM_SAND128:
1612                         return true;
1613                 default:
1614                         return false;
1615                 }
1616         case DRM_FORMAT_RGBX1010102:
1617         case DRM_FORMAT_BGRX1010102:
1618         case DRM_FORMAT_RGBA1010102:
1619         case DRM_FORMAT_BGRA1010102:
1620         case DRM_FORMAT_XRGB4444:
1621         case DRM_FORMAT_ARGB4444:
1622         case DRM_FORMAT_XBGR4444:
1623         case DRM_FORMAT_ABGR4444:
1624         case DRM_FORMAT_RGBX4444:
1625         case DRM_FORMAT_RGBA4444:
1626         case DRM_FORMAT_BGRX4444:
1627         case DRM_FORMAT_BGRA4444:
1628         case DRM_FORMAT_RGB332:
1629         case DRM_FORMAT_BGR233:
1630         case DRM_FORMAT_YUV422:
1631         case DRM_FORMAT_YVU422:
1632         case DRM_FORMAT_YUV420:
1633         case DRM_FORMAT_YVU420:
1634         case DRM_FORMAT_NV16:
1635         case DRM_FORMAT_NV61:
1636         default:
1637                 return (modifier == DRM_FORMAT_MOD_LINEAR);
1638         }
1639 }
1640
1641 static const struct drm_plane_funcs vc4_plane_funcs = {
1642         .update_plane = drm_atomic_helper_update_plane,
1643         .disable_plane = drm_atomic_helper_disable_plane,
1644         .reset = vc4_plane_reset,
1645         .atomic_duplicate_state = vc4_plane_duplicate_state,
1646         .atomic_destroy_state = vc4_plane_destroy_state,
1647         .format_mod_supported = vc4_format_mod_supported,
1648 };
1649
1650 struct drm_plane *vc4_plane_init(struct drm_device *dev,
1651                                  enum drm_plane_type type,
1652                                  uint32_t possible_crtcs)
1653 {
1654         struct vc4_dev *vc4 = to_vc4_dev(dev);
1655         struct drm_plane *plane;
1656         struct vc4_plane *vc4_plane;
1657         u32 formats[ARRAY_SIZE(hvs_formats)];
1658         int num_formats = 0;
1659         unsigned i;
1660         static const uint64_t modifiers[] = {
1661                 DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED,
1662                 DRM_FORMAT_MOD_BROADCOM_SAND128,
1663                 DRM_FORMAT_MOD_BROADCOM_SAND64,
1664                 DRM_FORMAT_MOD_BROADCOM_SAND256,
1665                 DRM_FORMAT_MOD_LINEAR,
1666                 DRM_FORMAT_MOD_INVALID
1667         };
1668
1669         for (i = 0; i < ARRAY_SIZE(hvs_formats); i++) {
1670                 if (!hvs_formats[i].hvs5_only || vc4->is_vc5) {
1671                         formats[num_formats] = hvs_formats[i].drm;
1672                         num_formats++;
1673                 }
1674         }
1675
1676         vc4_plane = drmm_universal_plane_alloc(dev, struct vc4_plane, base,
1677                                                possible_crtcs,
1678                                                &vc4_plane_funcs,
1679                                                formats, num_formats,
1680                                                modifiers, type, NULL);
1681         if (IS_ERR(vc4_plane))
1682                 return ERR_CAST(vc4_plane);
1683         plane = &vc4_plane->base;
1684
1685         if (vc4->is_vc5)
1686                 drm_plane_helper_add(plane, &vc5_plane_helper_funcs);
1687         else
1688                 drm_plane_helper_add(plane, &vc4_plane_helper_funcs);
1689
1690         drm_plane_create_alpha_property(plane);
1691         drm_plane_create_blend_mode_property(plane,
1692                                              BIT(DRM_MODE_BLEND_PIXEL_NONE) |
1693                                              BIT(DRM_MODE_BLEND_PREMULTI) |
1694                                              BIT(DRM_MODE_BLEND_COVERAGE));
1695         drm_plane_create_rotation_property(plane, DRM_MODE_ROTATE_0,
1696                                            DRM_MODE_ROTATE_0 |
1697                                            DRM_MODE_ROTATE_180 |
1698                                            DRM_MODE_REFLECT_X |
1699                                            DRM_MODE_REFLECT_Y);
1700
1701         drm_plane_create_color_properties(plane,
1702                                           BIT(DRM_COLOR_YCBCR_BT601) |
1703                                           BIT(DRM_COLOR_YCBCR_BT709) |
1704                                           BIT(DRM_COLOR_YCBCR_BT2020),
1705                                           BIT(DRM_COLOR_YCBCR_LIMITED_RANGE) |
1706                                           BIT(DRM_COLOR_YCBCR_FULL_RANGE),
1707                                           DRM_COLOR_YCBCR_BT709,
1708                                           DRM_COLOR_YCBCR_LIMITED_RANGE);
1709
1710         drm_plane_create_chroma_siting_properties(plane, 0, 0);
1711
1712         if (type == DRM_PLANE_TYPE_PRIMARY)
1713                 drm_plane_create_zpos_immutable_property(plane, 0);
1714
1715         return plane;
1716 }
1717
1718 #define VC4_NUM_OVERLAY_PLANES  16
1719
1720 int vc4_plane_create_additional_planes(struct drm_device *drm)
1721 {
1722         struct drm_plane *cursor_plane;
1723         struct drm_crtc *crtc;
1724         unsigned int i;
1725
1726         /* Set up some arbitrary number of planes.  We're not limited
1727          * by a set number of physical registers, just the space in
1728          * the HVS (16k) and how small an plane can be (28 bytes).
1729          * However, each plane we set up takes up some memory, and
1730          * increases the cost of looping over planes, which atomic
1731          * modesetting does quite a bit.  As a result, we pick a
1732          * modest number of planes to expose, that should hopefully
1733          * still cover any sane usecase.
1734          */
1735         for (i = 0; i < VC4_NUM_OVERLAY_PLANES; i++) {
1736                 struct drm_plane *plane =
1737                         vc4_plane_init(drm, DRM_PLANE_TYPE_OVERLAY,
1738                                        GENMASK(drm->mode_config.num_crtc - 1, 0));
1739
1740                 if (IS_ERR(plane))
1741                         continue;
1742
1743                 /* Create zpos property. Max of all the overlays + 1 primary +
1744                  * 1 cursor plane on a crtc.
1745                  */
1746                 drm_plane_create_zpos_property(plane, i + 1, 1,
1747                                                VC4_NUM_OVERLAY_PLANES + 1);
1748         }
1749
1750         drm_for_each_crtc(crtc, drm) {
1751                 /* Set up the legacy cursor after overlay initialization,
1752                  * since the zpos fallback is that planes are rendered by plane
1753                  * ID order, and that then puts the cursor on top.
1754                  */
1755                 cursor_plane = vc4_plane_init(drm, DRM_PLANE_TYPE_CURSOR,
1756                                               drm_crtc_mask(crtc));
1757                 if (!IS_ERR(cursor_plane)) {
1758                         crtc->cursor = cursor_plane;
1759
1760                         drm_plane_create_zpos_property(cursor_plane,
1761                                                        VC4_NUM_OVERLAY_PLANES + 1,
1762                                                        1,
1763                                                        VC4_NUM_OVERLAY_PLANES + 1);
1764                 }
1765         }
1766
1767         return 0;
1768 }