display/intel_atomic_plane.c

   1 /*
   2  * Copyright © 2014 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 /**
  25  * DOC: atomic plane helpers
  26  *
  27  * The functions here are used by the atomic plane helper functions to
  28  * implement legacy plane updates (i.e., drm_plane->update_plane() and
  29  * drm_plane->disable_plane()).  This allows plane updates to use the
  30  * atomic state infrastructure and perform plane updates as separate
  31  * prepare/check/commit/cleanup steps.
  32  */
  33
  34 #include <drm/drm_atomic_helper.h>
  35 #include <drm/drm_fourcc.h>
  36 #include <drm/drm_plane_helper.h>
  37
  38 #include "i915_trace.h"
  39 #include "intel_atomic_plane.h"
  40 #include "intel_cdclk.h"
  41 #include "intel_display_types.h"
  42 #include "intel_pm.h"
  43 #include "intel_sprite.h"
  44
  45 static void intel_plane_state_reset(struct intel_plane_state *plane_state,
  46                                     struct intel_plane *plane)
  47 {
  48         memset(plane_state, 0, sizeof(*plane_state));
  49
  50         __drm_atomic_helper_plane_state_reset(&plane_state->uapi, &plane->base);
  51
  52         plane_state->scaler_id = -1;
  53 }
  54
  55 struct intel_plane *intel_plane_alloc(void)
  56 {
  57         struct intel_plane_state *plane_state;
  58         struct intel_plane *plane;
  59
  60         plane = kzalloc(sizeof(*plane), GFP_KERNEL);
  61         if (!plane)
  62                 return ERR_PTR(-ENOMEM);
  63
  64         plane_state = kzalloc(sizeof(*plane_state), GFP_KERNEL);
  65         if (!plane_state) {
  66                 kfree(plane);
  67                 return ERR_PTR(-ENOMEM);
  68         }
  69
  70         intel_plane_state_reset(plane_state, plane);
  71
  72         plane->base.state = &plane_state->uapi;
  73
  74         return plane;
  75 }
  76
  77 void intel_plane_free(struct intel_plane *plane)
  78 {
  79         intel_plane_destroy_state(&plane->base, plane->base.state);
  80         kfree(plane);
  81 }
  82
  83 /**
  84  * intel_plane_duplicate_state - duplicate plane state
  85  * @plane: drm plane
  86  *
  87  * Allocates and returns a copy of the plane state (both common and
  88  * Intel-specific) for the specified plane.
  89  *
  90  * Returns: The newly allocated plane state, or NULL on failure.
  91  */
  92 struct drm_plane_state *
  93 intel_plane_duplicate_state(struct drm_plane *plane)
  94 {
  95         struct intel_plane_state *intel_state;
  96
  97         intel_state = to_intel_plane_state(plane->state);
  98         intel_state = kmemdup(intel_state, sizeof(*intel_state), GFP_KERNEL);
  99
 100         if (!intel_state)
 101                 return NULL;
 102
 103         __drm_atomic_helper_plane_duplicate_state(plane, &intel_state->uapi);
 104
 105         intel_state->vma = NULL;
 106         intel_state->flags = 0;
 107
 108         /* add reference to fb */
 109         if (intel_state->hw.fb)
 110                 drm_framebuffer_get(intel_state->hw.fb);
 111
 112         return &intel_state->uapi;
 113 }
 114
 115 /**
 116  * intel_plane_destroy_state - destroy plane state
 117  * @plane: drm plane
 118  * @state: state object to destroy
 119  *
 120  * Destroys the plane state (both common and Intel-specific) for the
 121  * specified plane.
 122  */
 123 void
 124 intel_plane_destroy_state(struct drm_plane *plane,
 125                           struct drm_plane_state *state)
 126 {
 127         struct intel_plane_state *plane_state = to_intel_plane_state(state);
 128         drm_WARN_ON(plane->dev, plane_state->vma);
 129
 130         __drm_atomic_helper_plane_destroy_state(&plane_state->uapi);
 131         if (plane_state->hw.fb)
 132                 drm_framebuffer_put(plane_state->hw.fb);
 133         kfree(plane_state);
 134 }
 135
 136 unsigned int intel_plane_pixel_rate(const struct intel_crtc_state *crtc_state,
 137                                     const struct intel_plane_state *plane_state)
 138 {
 139         unsigned int src_w, src_h, dst_w, dst_h;
 140         unsigned int pixel_rate = crtc_state->pixel_rate;
 141
 142         src_w = drm_rect_width(&plane_state->uapi.src) >> 16;
 143         src_h = drm_rect_height(&plane_state->uapi.src) >> 16;
 144         dst_w = drm_rect_width(&plane_state->uapi.dst);
 145         dst_h = drm_rect_height(&plane_state->uapi.dst);
 146
 147         /* Downscaling limits the maximum pixel rate */
 148         dst_w = min(src_w, dst_w);
 149         dst_h = min(src_h, dst_h);
 150
 151         return DIV_ROUND_UP_ULL(mul_u32_u32(pixel_rate, src_w * src_h),
 152                                 dst_w * dst_h);
 153 }
 154
 155 unsigned int intel_plane_data_rate(const struct intel_crtc_state *crtc_state,
 156                                    const struct intel_plane_state *plane_state)
 157 {
 158         const struct drm_framebuffer *fb = plane_state->hw.fb;
 159         unsigned int cpp;
 160         unsigned int pixel_rate;
 161
 162         if (!plane_state->uapi.visible)
 163                 return 0;
 164
 165         pixel_rate = intel_plane_pixel_rate(crtc_state, plane_state);
 166
 167         cpp = fb->format->cpp[0];
 168
 169         /*
 170          * Based on HSD#:1408715493
 171          * NV12 cpp == 4, P010 cpp == 8
 172          *
 173          * FIXME what is the logic behind this?
 174          */
 175         if (fb->format->is_yuv && fb->format->num_planes > 1)
 176                 cpp *= 4;
 177
 178         return pixel_rate * cpp;
 179 }
 180
 181 int intel_plane_calc_min_cdclk(struct intel_atomic_state *state,
 182                                struct intel_plane *plane,
 183                                bool *need_cdclk_calc)
 184 {
 185         struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
 186         const struct intel_plane_state *plane_state =
 187                 intel_atomic_get_new_plane_state(state, plane);
 188         struct intel_crtc *crtc = to_intel_crtc(plane_state->hw.crtc);
 189         const struct intel_cdclk_state *cdclk_state;
 190         const struct intel_crtc_state *old_crtc_state;
 191         struct intel_crtc_state *new_crtc_state;
 192
 193         if (!plane_state->uapi.visible || !plane->min_cdclk)
 194                 return 0;
 195
 196         old_crtc_state = intel_atomic_get_old_crtc_state(state, crtc);
 197         new_crtc_state = intel_atomic_get_new_crtc_state(state, crtc);
 198
 199         new_crtc_state->min_cdclk[plane->id] =
 200                 plane->min_cdclk(new_crtc_state, plane_state);
 201
 202         /*
 203          * No need to check against the cdclk state if
 204          * the min cdclk for the plane doesn't increase.
 205          *
 206          * Ie. we only ever increase the cdclk due to plane
 207          * requirements. This can reduce back and forth
 208          * display blinking due to constant cdclk changes.
 209          */
 210         if (new_crtc_state->min_cdclk[plane->id] <=
 211             old_crtc_state->min_cdclk[plane->id])
 212                 return 0;
 213
 214         cdclk_state = intel_atomic_get_cdclk_state(state);
 215         if (IS_ERR(cdclk_state))
 216                 return PTR_ERR(cdclk_state);
 217
 218         /*
 219          * No need to recalculate the cdclk state if
 220          * the min cdclk for the pipe doesn't increase.
 221          *
 222          * Ie. we only ever increase the cdclk due to plane
 223          * requirements. This can reduce back and forth
 224          * display blinking due to constant cdclk changes.
 225          */
 226         if (new_crtc_state->min_cdclk[plane->id] <=
 227             cdclk_state->min_cdclk[crtc->pipe])
 228                 return 0;
 229
 230         drm_dbg_kms(&dev_priv->drm,
 231                     "[PLANE:%d:%s] min cdclk (%d kHz) > [CRTC:%d:%s] min cdclk (%d kHz)\n",
 232                     plane->base.base.id, plane->base.name,
 233                     new_crtc_state->min_cdclk[plane->id],
 234                     crtc->base.base.id, crtc->base.name,
 235                     cdclk_state->min_cdclk[crtc->pipe]);
 236         *need_cdclk_calc = true;
 237
 238         return 0;
 239 }
 240
 241 static void intel_plane_clear_hw_state(struct intel_plane_state *plane_state)
 242 {
 243         if (plane_state->hw.fb)
 244                 drm_framebuffer_put(plane_state->hw.fb);
 245
 246         memset(&plane_state->hw, 0, sizeof(plane_state->hw));
 247 }
 248
 249 void intel_plane_copy_uapi_to_hw_state(struct intel_plane_state *plane_state,
 250                                        const struct intel_plane_state *from_plane_state)
 251 {
 252         intel_plane_clear_hw_state(plane_state);
 253
 254         plane_state->hw.crtc = from_plane_state->uapi.crtc;
 255         plane_state->hw.fb = from_plane_state->uapi.fb;
 256         if (plane_state->hw.fb)
 257                 drm_framebuffer_get(plane_state->hw.fb);
 258
 259         plane_state->hw.alpha = from_plane_state->uapi.alpha;
 260         plane_state->hw.pixel_blend_mode =
 261                 from_plane_state->uapi.pixel_blend_mode;
 262         plane_state->hw.rotation = from_plane_state->uapi.rotation;
 263         plane_state->hw.color_encoding = from_plane_state->uapi.color_encoding;
 264         plane_state->hw.color_range = from_plane_state->uapi.color_range;
 265 }
 266
 267 void intel_plane_set_invisible(struct intel_crtc_state *crtc_state,
 268                                struct intel_plane_state *plane_state)
 269 {
 270         struct intel_plane *plane = to_intel_plane(plane_state->uapi.plane);
 271
 272         crtc_state->active_planes &= ~BIT(plane->id);
 273         crtc_state->nv12_planes &= ~BIT(plane->id);
 274         crtc_state->c8_planes &= ~BIT(plane->id);
 275         crtc_state->data_rate[plane->id] = 0;
 276         crtc_state->min_cdclk[plane->id] = 0;
 277
 278         plane_state->uapi.visible = false;
 279 }
 280
 281 int intel_plane_atomic_check_with_state(const struct intel_crtc_state *old_crtc_state,
 282                                         struct intel_crtc_state *new_crtc_state,
 283                                         const struct intel_plane_state *old_plane_state,
 284                                         struct intel_plane_state *new_plane_state)
 285 {
 286         struct intel_plane *plane = to_intel_plane(new_plane_state->uapi.plane);
 287         const struct drm_framebuffer *fb = new_plane_state->hw.fb;
 288         int ret;
 289
 290         intel_plane_set_invisible(new_crtc_state, new_plane_state);
 291
 292         if (!new_plane_state->hw.crtc && !old_plane_state->hw.crtc)
 293                 return 0;
 294
 295         ret = plane->check_plane(new_crtc_state, new_plane_state);
 296         if (ret)
 297                 return ret;
 298
 299         /* FIXME pre-g4x don't work like this */
 300         if (new_plane_state->uapi.visible)
 301                 new_crtc_state->active_planes |= BIT(plane->id);
 302
 303         if (new_plane_state->uapi.visible &&
 304             intel_format_info_is_yuv_semiplanar(fb->format, fb->modifier))
 305                 new_crtc_state->nv12_planes |= BIT(plane->id);
 306
 307         if (new_plane_state->uapi.visible &&
 308             fb->format->format == DRM_FORMAT_C8)
 309                 new_crtc_state->c8_planes |= BIT(plane->id);
 310
 311         if (new_plane_state->uapi.visible || old_plane_state->uapi.visible)
 312                 new_crtc_state->update_planes |= BIT(plane->id);
 313
 314         new_crtc_state->data_rate[plane->id] =
 315                 intel_plane_data_rate(new_crtc_state, new_plane_state);
 316
 317         return intel_plane_atomic_calc_changes(old_crtc_state, new_crtc_state,
 318                                                old_plane_state, new_plane_state);
 319 }
 320
 321 static struct intel_crtc *
 322 get_crtc_from_states(const struct intel_plane_state *old_plane_state,
 323                      const struct intel_plane_state *new_plane_state)
 324 {
 325         if (new_plane_state->uapi.crtc)
 326                 return to_intel_crtc(new_plane_state->uapi.crtc);
 327
 328         if (old_plane_state->uapi.crtc)
 329                 return to_intel_crtc(old_plane_state->uapi.crtc);
 330
 331         return NULL;
 332 }
 333
 334 int intel_plane_atomic_check(struct intel_atomic_state *state,
 335                              struct intel_plane *plane)
 336 {
 337         struct intel_plane_state *new_plane_state =
 338                 intel_atomic_get_new_plane_state(state, plane);
 339         const struct intel_plane_state *old_plane_state =
 340                 intel_atomic_get_old_plane_state(state, plane);
 341         struct intel_crtc *crtc =
 342                 get_crtc_from_states(old_plane_state, new_plane_state);
 343         const struct intel_crtc_state *old_crtc_state;
 344         struct intel_crtc_state *new_crtc_state;
 345
 346         intel_plane_copy_uapi_to_hw_state(new_plane_state, new_plane_state);
 347         new_plane_state->uapi.visible = false;
 348         if (!crtc)
 349                 return 0;
 350
 351         old_crtc_state = intel_atomic_get_old_crtc_state(state, crtc);
 352         new_crtc_state = intel_atomic_get_new_crtc_state(state, crtc);
 353
 354         return intel_plane_atomic_check_with_state(old_crtc_state,
 355                                                    new_crtc_state,
 356                                                    old_plane_state,
 357                                                    new_plane_state);
 358 }
 359
 360 static struct intel_plane *
 361 skl_next_plane_to_commit(struct intel_atomic_state *state,
 362                          struct intel_crtc *crtc,
 363                          struct skl_ddb_entry entries_y[I915_MAX_PLANES],
 364                          struct skl_ddb_entry entries_uv[I915_MAX_PLANES],
 365                          unsigned int *update_mask)
 366 {
 367         struct intel_crtc_state *crtc_state =
 368                 intel_atomic_get_new_crtc_state(state, crtc);
 369         struct intel_plane_state *plane_state;
 370         struct intel_plane *plane;
 371         int i;
 372
 373         if (*update_mask == 0)
 374                 return NULL;
 375
 376         for_each_new_intel_plane_in_state(state, plane, plane_state, i) {
 377                 enum plane_id plane_id = plane->id;
 378
 379                 if (crtc->pipe != plane->pipe ||
 380                     !(*update_mask & BIT(plane_id)))
 381                         continue;
 382
 383                 if (skl_ddb_allocation_overlaps(&crtc_state->wm.skl.plane_ddb_y[plane_id],
 384                                                 entries_y,
 385                                                 I915_MAX_PLANES, plane_id) ||
 386                     skl_ddb_allocation_overlaps(&crtc_state->wm.skl.plane_ddb_uv[plane_id],
 387                                                 entries_uv,
 388                                                 I915_MAX_PLANES, plane_id))
 389                         continue;
 390
 391                 *update_mask &= ~BIT(plane_id);
 392                 entries_y[plane_id] = crtc_state->wm.skl.plane_ddb_y[plane_id];
 393                 entries_uv[plane_id] = crtc_state->wm.skl.plane_ddb_uv[plane_id];
 394
 395                 return plane;
 396         }
 397
 398         /* should never happen */
 399         drm_WARN_ON(state->base.dev, 1);
 400
 401         return NULL;
 402 }
 403
 404 void intel_update_plane(struct intel_plane *plane,
 405                         const struct intel_crtc_state *crtc_state,
 406                         const struct intel_plane_state *plane_state)
 407 {
 408         struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 409
 410         trace_intel_update_plane(&plane->base, crtc);
 411         plane->update_plane(plane, crtc_state, plane_state);
 412 }
 413
 414 void intel_disable_plane(struct intel_plane *plane,
 415                          const struct intel_crtc_state *crtc_state)
 416 {
 417         struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 418
 419         trace_intel_disable_plane(&plane->base, crtc);
 420         plane->disable_plane(plane, crtc_state);
 421 }
 422
 423 void skl_update_planes_on_crtc(struct intel_atomic_state *state,
 424                                struct intel_crtc *crtc)
 425 {
 426         struct intel_crtc_state *old_crtc_state =
 427                 intel_atomic_get_old_crtc_state(state, crtc);
 428         struct intel_crtc_state *new_crtc_state =
 429                 intel_atomic_get_new_crtc_state(state, crtc);
 430         struct skl_ddb_entry entries_y[I915_MAX_PLANES];
 431         struct skl_ddb_entry entries_uv[I915_MAX_PLANES];
 432         u32 update_mask = new_crtc_state->update_planes;
 433         struct intel_plane *plane;
 434
 435         memcpy(entries_y, old_crtc_state->wm.skl.plane_ddb_y,
 436                sizeof(old_crtc_state->wm.skl.plane_ddb_y));
 437         memcpy(entries_uv, old_crtc_state->wm.skl.plane_ddb_uv,
 438                sizeof(old_crtc_state->wm.skl.plane_ddb_uv));
 439
 440         while ((plane = skl_next_plane_to_commit(state, crtc,
 441                                                  entries_y, entries_uv,
 442                                                  &update_mask))) {
 443                 struct intel_plane_state *new_plane_state =
 444                         intel_atomic_get_new_plane_state(state, plane);
 445
 446                 if (new_plane_state->uapi.visible ||
 447                     new_plane_state->planar_slave) {
 448                         intel_update_plane(plane, new_crtc_state, new_plane_state);
 449                 } else {
 450                         intel_disable_plane(plane, new_crtc_state);
 451                 }
 452         }
 453 }
 454
 455 void i9xx_update_planes_on_crtc(struct intel_atomic_state *state,
 456                                 struct intel_crtc *crtc)
 457 {
 458         struct intel_crtc_state *new_crtc_state =
 459                 intel_atomic_get_new_crtc_state(state, crtc);
 460         u32 update_mask = new_crtc_state->update_planes;
 461         struct intel_plane_state *new_plane_state;
 462         struct intel_plane *plane;
 463         int i;
 464
 465         for_each_new_intel_plane_in_state(state, plane, new_plane_state, i) {
 466                 if (crtc->pipe != plane->pipe ||
 467                     !(update_mask & BIT(plane->id)))
 468                         continue;
 469
 470                 if (new_plane_state->uapi.visible)
 471                         intel_update_plane(plane, new_crtc_state, new_plane_state);
 472                 else
 473                         intel_disable_plane(plane, new_crtc_state);
 474         }
 475 }
 476
 477 const struct drm_plane_helper_funcs intel_plane_helper_funcs = {
 478         .prepare_fb = intel_prepare_plane_fb,
 479         .cleanup_fb = intel_cleanup_plane_fb,
 480 };