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