drivers/gpu/drm/tegra/plane.c

   1 /*
   2  * Copyright (C) 2017 NVIDIA CORPORATION.  All rights reserved.
   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 #include <drm/drm_atomic.h>
  10 #include <drm/drm_atomic_helper.h>
  11 #include <drm/drm_plane_helper.h>
  12
  13 #include "dc.h"
  14 #include "plane.h"
  15
  16 static void tegra_plane_destroy(struct drm_plane *plane)
  17 {
  18         struct tegra_plane *p = to_tegra_plane(plane);
  19
  20         drm_plane_cleanup(plane);
  21         kfree(p);
  22 }
  23
  24 static void tegra_plane_reset(struct drm_plane *plane)
  25 {
  26         struct tegra_plane_state *state;
  27
  28         if (plane->state)
  29                 __drm_atomic_helper_plane_destroy_state(plane->state);
  30
  31         kfree(plane->state);
  32         plane->state = NULL;
  33
  34         state = kzalloc(sizeof(*state), GFP_KERNEL);
  35         if (state) {
  36                 plane->state = &state->base;
  37                 plane->state->plane = plane;
  38         }
  39 }
  40
  41 static struct drm_plane_state *
  42 tegra_plane_atomic_duplicate_state(struct drm_plane *plane)
  43 {
  44         struct tegra_plane_state *state = to_tegra_plane_state(plane->state);
  45         struct tegra_plane_state *copy;
  46         unsigned int i;
  47
  48         copy = kmalloc(sizeof(*copy), GFP_KERNEL);
  49         if (!copy)
  50                 return NULL;
  51
  52         __drm_atomic_helper_plane_duplicate_state(plane, &copy->base);
  53         copy->tiling = state->tiling;
  54         copy->format = state->format;
  55         copy->swap = state->swap;
  56         copy->opaque = state->opaque;
  57
  58         for (i = 0; i < 3; i++)
  59                 copy->dependent[i] = state->dependent[i];
  60
  61         return &copy->base;
  62 }
  63
  64 static void tegra_plane_atomic_destroy_state(struct drm_plane *plane,
  65                                              struct drm_plane_state *state)
  66 {
  67         __drm_atomic_helper_plane_destroy_state(state);
  68         kfree(state);
  69 }
  70
  71 static bool tegra_plane_format_mod_supported(struct drm_plane *plane,
  72                                              uint32_t format,
  73                                              uint64_t modifier)
  74 {
  75         const struct drm_format_info *info = drm_format_info(format);
  76
  77         if (modifier == DRM_FORMAT_MOD_LINEAR)
  78                 return true;
  79
  80         if (info->num_planes == 1)
  81                 return true;
  82
  83         return false;
  84 }
  85
  86 const struct drm_plane_funcs tegra_plane_funcs = {
  87         .update_plane = drm_atomic_helper_update_plane,
  88         .disable_plane = drm_atomic_helper_disable_plane,
  89         .destroy = tegra_plane_destroy,
  90         .reset = tegra_plane_reset,
  91         .atomic_duplicate_state = tegra_plane_atomic_duplicate_state,
  92         .atomic_destroy_state = tegra_plane_atomic_destroy_state,
  93         .format_mod_supported = tegra_plane_format_mod_supported,
  94 };
  95
  96 int tegra_plane_state_add(struct tegra_plane *plane,
  97                           struct drm_plane_state *state)
  98 {
  99         struct drm_crtc_state *crtc_state;
 100         struct tegra_dc_state *tegra;
 101         int err;
 102
 103         /* Propagate errors from allocation or locking failures. */
 104         crtc_state = drm_atomic_get_crtc_state(state->state, state->crtc);
 105         if (IS_ERR(crtc_state))
 106                 return PTR_ERR(crtc_state);
 107
 108         /* Check plane state for visibility and calculate clipping bounds */
 109         err = drm_atomic_helper_check_plane_state(state, crtc_state,
 110                                                   0, INT_MAX, true, true);
 111         if (err < 0)
 112                 return err;
 113
 114         tegra = to_dc_state(crtc_state);
 115
 116         tegra->planes |= WIN_A_ACT_REQ << plane->index;
 117
 118         return 0;
 119 }
 120
 121 int tegra_plane_format(u32 fourcc, u32 *format, u32 *swap)
 122 {
 123         /* assume no swapping of fetched data */
 124         if (swap)
 125                 *swap = BYTE_SWAP_NOSWAP;
 126
 127         switch (fourcc) {
 128         case DRM_FORMAT_ARGB4444:
 129                 *format = WIN_COLOR_DEPTH_B4G4R4A4;
 130                 break;
 131
 132         case DRM_FORMAT_ARGB1555:
 133                 *format = WIN_COLOR_DEPTH_B5G5R5A1;
 134                 break;
 135
 136         case DRM_FORMAT_RGB565:
 137                 *format = WIN_COLOR_DEPTH_B5G6R5;
 138                 break;
 139
 140         case DRM_FORMAT_RGBA5551:
 141                 *format = WIN_COLOR_DEPTH_A1B5G5R5;
 142                 break;
 143
 144         case DRM_FORMAT_ARGB8888:
 145                 *format = WIN_COLOR_DEPTH_B8G8R8A8;
 146                 break;
 147
 148         case DRM_FORMAT_ABGR8888:
 149                 *format = WIN_COLOR_DEPTH_R8G8B8A8;
 150                 break;
 151
 152         case DRM_FORMAT_ABGR4444:
 153                 *format = WIN_COLOR_DEPTH_R4G4B4A4;
 154                 break;
 155
 156         case DRM_FORMAT_ABGR1555:
 157                 *format = WIN_COLOR_DEPTH_R5G5B5A;
 158                 break;
 159
 160         case DRM_FORMAT_BGRA5551:
 161                 *format = WIN_COLOR_DEPTH_AR5G5B5;
 162                 break;
 163
 164         case DRM_FORMAT_XRGB1555:
 165                 *format = WIN_COLOR_DEPTH_B5G5R5X1;
 166                 break;
 167
 168         case DRM_FORMAT_RGBX5551:
 169                 *format = WIN_COLOR_DEPTH_X1B5G5R5;
 170                 break;
 171
 172         case DRM_FORMAT_XBGR1555:
 173                 *format = WIN_COLOR_DEPTH_R5G5B5X1;
 174                 break;
 175
 176         case DRM_FORMAT_BGRX5551:
 177                 *format = WIN_COLOR_DEPTH_X1R5G5B5;
 178                 break;
 179
 180         case DRM_FORMAT_BGR565:
 181                 *format = WIN_COLOR_DEPTH_R5G6B5;
 182                 break;
 183
 184         case DRM_FORMAT_BGRA8888:
 185                 *format = WIN_COLOR_DEPTH_A8R8G8B8;
 186                 break;
 187
 188         case DRM_FORMAT_RGBA8888:
 189                 *format = WIN_COLOR_DEPTH_A8B8G8R8;
 190                 break;
 191
 192         case DRM_FORMAT_XRGB8888:
 193                 *format = WIN_COLOR_DEPTH_B8G8R8X8;
 194                 break;
 195
 196         case DRM_FORMAT_XBGR8888:
 197                 *format = WIN_COLOR_DEPTH_R8G8B8X8;
 198                 break;
 199
 200         case DRM_FORMAT_UYVY:
 201                 *format = WIN_COLOR_DEPTH_YCbCr422;
 202                 break;
 203
 204         case DRM_FORMAT_YUYV:
 205                 if (!swap)
 206                         return -EINVAL;
 207
 208                 *format = WIN_COLOR_DEPTH_YCbCr422;
 209                 *swap = BYTE_SWAP_SWAP2;
 210                 break;
 211
 212         case DRM_FORMAT_YUV420:
 213                 *format = WIN_COLOR_DEPTH_YCbCr420P;
 214                 break;
 215
 216         case DRM_FORMAT_YUV422:
 217                 *format = WIN_COLOR_DEPTH_YCbCr422P;
 218                 break;
 219
 220         default:
 221                 return -EINVAL;
 222         }
 223
 224         return 0;
 225 }
 226
 227 bool tegra_plane_format_is_yuv(unsigned int format, bool *planar)
 228 {
 229         switch (format) {
 230         case WIN_COLOR_DEPTH_YCbCr422:
 231         case WIN_COLOR_DEPTH_YUV422:
 232                 if (planar)
 233                         *planar = false;
 234
 235                 return true;
 236
 237         case WIN_COLOR_DEPTH_YCbCr420P:
 238         case WIN_COLOR_DEPTH_YUV420P:
 239         case WIN_COLOR_DEPTH_YCbCr422P:
 240         case WIN_COLOR_DEPTH_YUV422P:
 241         case WIN_COLOR_DEPTH_YCbCr422R:
 242         case WIN_COLOR_DEPTH_YUV422R:
 243         case WIN_COLOR_DEPTH_YCbCr422RA:
 244         case WIN_COLOR_DEPTH_YUV422RA:
 245                 if (planar)
 246                         *planar = true;
 247
 248                 return true;
 249         }
 250
 251         if (planar)
 252                 *planar = false;
 253
 254         return false;
 255 }
 256
 257 static bool __drm_format_has_alpha(u32 format)
 258 {
 259         switch (format) {
 260         case DRM_FORMAT_ARGB1555:
 261         case DRM_FORMAT_RGBA5551:
 262         case DRM_FORMAT_ABGR8888:
 263         case DRM_FORMAT_ARGB8888:
 264                 return true;
 265         }
 266
 267         return false;
 268 }
 269
 270 /*
 271  * This is applicable to Tegra20 and Tegra30 only where the opaque formats can
 272  * be emulated using the alpha formats and alpha blending disabled.
 273  */
 274 bool tegra_plane_format_has_alpha(unsigned int format)
 275 {
 276         switch (format) {
 277         case WIN_COLOR_DEPTH_B5G5R5A1:
 278         case WIN_COLOR_DEPTH_A1B5G5R5:
 279         case WIN_COLOR_DEPTH_R8G8B8A8:
 280         case WIN_COLOR_DEPTH_B8G8R8A8:
 281                 return true;
 282         }
 283
 284         return false;
 285 }
 286
 287 int tegra_plane_format_get_alpha(unsigned int opaque, unsigned int *alpha)
 288 {
 289         if (tegra_plane_format_is_yuv(opaque, NULL)) {
 290                 *alpha = opaque;
 291                 return 0;
 292         }
 293
 294         switch (opaque) {
 295         case WIN_COLOR_DEPTH_B5G5R5X1:
 296                 *alpha = WIN_COLOR_DEPTH_B5G5R5A1;
 297                 return 0;
 298
 299         case WIN_COLOR_DEPTH_X1B5G5R5:
 300                 *alpha = WIN_COLOR_DEPTH_A1B5G5R5;
 301                 return 0;
 302
 303         case WIN_COLOR_DEPTH_R8G8B8X8:
 304                 *alpha = WIN_COLOR_DEPTH_R8G8B8A8;
 305                 return 0;
 306
 307         case WIN_COLOR_DEPTH_B8G8R8X8:
 308                 *alpha = WIN_COLOR_DEPTH_B8G8R8A8;
 309                 return 0;
 310
 311         case WIN_COLOR_DEPTH_B5G6R5:
 312                 *alpha = opaque;
 313                 return 0;
 314         }
 315
 316         return -EINVAL;
 317 }
 318
 319 static unsigned int tegra_plane_get_overlap_index(struct tegra_plane *plane,
 320                                                   struct tegra_plane *other)
 321 {
 322         unsigned int index = 0, i;
 323
 324         WARN_ON(plane == other);
 325
 326         for (i = 0; i < 3; i++) {
 327                 if (i == plane->index)
 328                         continue;
 329
 330                 if (i == other->index)
 331                         break;
 332
 333                 index++;
 334         }
 335
 336         return index;
 337 }
 338
 339 void tegra_plane_check_dependent(struct tegra_plane *tegra,
 340                                  struct tegra_plane_state *state)
 341 {
 342         struct drm_plane_state *old, *new;
 343         struct drm_plane *plane;
 344         unsigned int zpos[2];
 345         unsigned int i;
 346
 347         for (i = 0; i < 2; i++)
 348                 zpos[i] = 0;
 349
 350         for_each_oldnew_plane_in_state(state->base.state, plane, old, new, i) {
 351                 struct tegra_plane *p = to_tegra_plane(plane);
 352                 unsigned index;
 353
 354                 /* skip this plane and planes on different CRTCs */
 355                 if (p == tegra || new->crtc != state->base.crtc)
 356                         continue;
 357
 358                 index = tegra_plane_get_overlap_index(tegra, p);
 359
 360                 state->dependent[index] = false;
 361
 362                 /*
 363                  * If any of the other planes is on top of this plane and uses
 364                  * a format with an alpha component, mark this plane as being
 365                  * dependent, meaning it's alpha value will be 1 minus the sum
 366                  * of alpha components of the overlapping planes.
 367                  */
 368                 if (p->index > tegra->index) {
 369                         if (__drm_format_has_alpha(new->fb->format->format))
 370                                 state->dependent[index] = true;
 371
 372                         /* keep track of the Z position */
 373                         zpos[index] = p->index;
 374                 }
 375         }
 376
 377         /*
 378          * The region where three windows overlap is the intersection of the
 379          * two regions where two windows overlap. It contributes to the area
 380          * if any of the windows on top of it have an alpha component.
 381          */
 382         for (i = 0; i < 2; i++)
 383                 state->dependent[2] = state->dependent[2] ||
 384                                       state->dependent[i];
 385
 386         /*
 387          * However, if any of the windows on top of this window is opaque, it
 388          * will completely conceal this window within that area, so avoid the
 389          * window from contributing to the area.
 390          */
 391         for (i = 0; i < 2; i++) {
 392                 if (zpos[i] > tegra->index)
 393                         state->dependent[2] = state->dependent[2] &&
 394                                               state->dependent[i];
 395         }
 396 }