drivers/gpu/drm/i915/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_display_types.h"
  41 #include "intel_pm.h"
  42 #include "intel_sprite.h"
  43
  44 static void intel_plane_state_reset(struct intel_plane_state *plane_state,
  45                                     struct intel_plane *plane)
  46 {
  47         memset(plane_state, 0, sizeof(*plane_state));
  48
  49         __drm_atomic_helper_plane_state_reset(&plane_state->uapi, &plane->base);
  50
  51         plane_state->scaler_id = -1;
  52 }
  53
  54 struct intel_plane *intel_plane_alloc(void)
  55 {
  56         struct intel_plane_state *plane_state;
  57         struct intel_plane *plane;
  58
  59         plane = kzalloc(sizeof(*plane), GFP_KERNEL);
  60         if (!plane)
  61                 return ERR_PTR(-ENOMEM);
  62
  63         plane_state = kzalloc(sizeof(*plane_state), GFP_KERNEL);
  64         if (!plane_state) {
  65                 kfree(plane);
  66                 return ERR_PTR(-ENOMEM);
  67         }
  68
  69         intel_plane_state_reset(plane_state, plane);
  70
  71         plane->base.state = &plane_state->uapi;
  72
  73         return plane;
  74 }
  75
  76 void intel_plane_free(struct intel_plane *plane)
  77 {
  78         intel_plane_destroy_state(&plane->base, plane->base.state);
  79         kfree(plane);
  80 }
  81
  82 /**
  83  * intel_plane_duplicate_state - duplicate plane state
  84  * @plane: drm plane
  85  *
  86  * Allocates and returns a copy of the plane state (both common and
  87  * Intel-specific) for the specified plane.
  88  *
  89  * Returns: The newly allocated plane state, or NULL on failure.
  90  */
  91 struct drm_plane_state *
  92 intel_plane_duplicate_state(struct drm_plane *plane)
  93 {
  94         struct intel_plane_state *intel_state;
  95
  96         intel_state = to_intel_plane_state(plane->state);
  97         intel_state = kmemdup(intel_state, sizeof(*intel_state), GFP_KERNEL);
  98
  99         if (!intel_state)
 100                 return NULL;
 101
 102         __drm_atomic_helper_plane_duplicate_state(plane, &intel_state->uapi);
 103
 104         intel_state->vma = NULL;
 105         intel_state->flags = 0;
 106
 107         /* add reference to fb */
 108         if (intel_state->hw.fb)
 109                 drm_framebuffer_get(intel_state->hw.fb);
 110
 111         return &intel_state->uapi;
 112 }
 113
 114 /**
 115  * intel_plane_destroy_state - destroy plane state
 116  * @plane: drm plane
 117  * @state: state object to destroy
 118  *
 119  * Destroys the plane state (both common and Intel-specific) for the
 120  * specified plane.
 121  */
 122 void
 123 intel_plane_destroy_state(struct drm_plane *plane,
 124                           struct drm_plane_state *state)
 125 {
 126         struct intel_plane_state *plane_state = to_intel_plane_state(state);
 127         WARN_ON(plane_state->vma);
 128
 129         __drm_atomic_helper_plane_destroy_state(&plane_state->uapi);
 130         if (plane_state->hw.fb)
 131                 drm_framebuffer_put(plane_state->hw.fb);
 132         kfree(plane_state);
 133 }
 134
 135 unsigned int intel_plane_data_rate(const struct intel_crtc_state *crtc_state,
 136                                    const struct intel_plane_state *plane_state)
 137 {
 138         const struct drm_framebuffer *fb = plane_state->hw.fb;
 139         unsigned int cpp;
 140
 141         if (!plane_state->uapi.visible)
 142                 return 0;
 143
 144         cpp = fb->format->cpp[0];
 145
 146         /*
 147          * Based on HSD#:1408715493
 148          * NV12 cpp == 4, P010 cpp == 8
 149          *
 150          * FIXME what is the logic behind this?
 151          */
 152         if (fb->format->is_yuv && fb->format->num_planes > 1)
 153                 cpp *= 4;
 154
 155         return cpp * crtc_state->pixel_rate;
 156 }
 157
 158 bool intel_plane_calc_min_cdclk(struct intel_atomic_state *state,
 159                                 struct intel_plane *plane)
 160 {
 161         struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
 162         const struct intel_plane_state *plane_state =
 163                 intel_atomic_get_new_plane_state(state, plane);
 164         struct intel_crtc *crtc = to_intel_crtc(plane_state->hw.crtc);
 165         struct intel_crtc_state *crtc_state;
 166
 167         if (!plane_state->uapi.visible || !plane->min_cdclk)
 168                 return false;
 169
 170         crtc_state = intel_atomic_get_new_crtc_state(state, crtc);
 171
 172         crtc_state->min_cdclk[plane->id] =
 173                 plane->min_cdclk(crtc_state, plane_state);
 174
 175         /*
 176          * Does the cdclk need to be bumbed up?
 177          *
 178          * Note: we obviously need to be called before the new
 179          * cdclk frequency is calculated so state->cdclk.logical
 180          * hasn't been populated yet. Hence we look at the old
 181          * cdclk state under dev_priv->cdclk.logical. This is
 182          * safe as long we hold at least one crtc mutex (which
 183          * must be true since we have crtc_state).
 184          */
 185         if (crtc_state->min_cdclk[plane->id] > dev_priv->cdclk.logical.cdclk) {
 186                 DRM_DEBUG_KMS("[PLANE:%d:%s] min_cdclk (%d kHz) > logical cdclk (%d kHz)\n",
 187                               plane->base.base.id, plane->base.name,
 188                               crtc_state->min_cdclk[plane->id],
 189                               dev_priv->cdclk.logical.cdclk);
 190                 return true;
 191         }
 192
 193         return false;
 194 }
 195
 196 static void intel_plane_clear_hw_state(struct intel_plane_state *plane_state)
 197 {
 198         if (plane_state->hw.fb)
 199                 drm_framebuffer_put(plane_state->hw.fb);
 200
 201         memset(&plane_state->hw, 0, sizeof(plane_state->hw));
 202 }
 203
 204 void intel_plane_copy_uapi_to_hw_state(struct intel_plane_state *plane_state,
 205                                        const struct intel_plane_state *from_plane_state)
 206 {
 207         intel_plane_clear_hw_state(plane_state);
 208
 209         plane_state->hw.crtc = from_plane_state->uapi.crtc;
 210         plane_state->hw.fb = from_plane_state->uapi.fb;
 211         if (plane_state->hw.fb)
 212                 drm_framebuffer_get(plane_state->hw.fb);
 213
 214         plane_state->hw.alpha = from_plane_state->uapi.alpha;
 215         plane_state->hw.pixel_blend_mode =
 216                 from_plane_state->uapi.pixel_blend_mode;
 217         plane_state->hw.rotation = from_plane_state->uapi.rotation;
 218         plane_state->hw.color_encoding = from_plane_state->uapi.color_encoding;
 219         plane_state->hw.color_range = from_plane_state->uapi.color_range;
 220 }
 221
 222 int intel_plane_atomic_check_with_state(const struct intel_crtc_state *old_crtc_state,
 223                                         struct intel_crtc_state *new_crtc_state,
 224                                         const struct intel_plane_state *old_plane_state,
 225                                         struct intel_plane_state *new_plane_state)
 226 {
 227         struct intel_plane *plane = to_intel_plane(new_plane_state->uapi.plane);
 228         const struct drm_framebuffer *fb;
 229         int ret;
 230
 231         intel_plane_copy_uapi_to_hw_state(new_plane_state, new_plane_state);
 232         fb = new_plane_state->hw.fb;
 233
 234         new_crtc_state->active_planes &= ~BIT(plane->id);
 235         new_crtc_state->nv12_planes &= ~BIT(plane->id);
 236         new_crtc_state->c8_planes &= ~BIT(plane->id);
 237         new_crtc_state->data_rate[plane->id] = 0;
 238         new_crtc_state->min_cdclk[plane->id] = 0;
 239         new_plane_state->uapi.visible = false;
 240
 241         if (!new_plane_state->hw.crtc && !old_plane_state->hw.crtc)
 242                 return 0;
 243
 244         ret = plane->check_plane(new_crtc_state, new_plane_state);
 245         if (ret)
 246                 return ret;
 247
 248         /* FIXME pre-g4x don't work like this */
 249         if (new_plane_state->uapi.visible)
 250                 new_crtc_state->active_planes |= BIT(plane->id);
 251
 252         if (new_plane_state->uapi.visible &&
 253             intel_format_info_is_yuv_semiplanar(fb->format, fb->modifier))
 254                 new_crtc_state->nv12_planes |= BIT(plane->id);
 255
 256         if (new_plane_state->uapi.visible &&
 257             fb->format->format == DRM_FORMAT_C8)
 258                 new_crtc_state->c8_planes |= BIT(plane->id);
 259
 260         if (new_plane_state->uapi.visible || old_plane_state->uapi.visible)
 261                 new_crtc_state->update_planes |= BIT(plane->id);
 262
 263         new_crtc_state->data_rate[plane->id] =
 264                 intel_plane_data_rate(new_crtc_state, new_plane_state);
 265
 266         return intel_plane_atomic_calc_changes(old_crtc_state, new_crtc_state,
 267                                                old_plane_state, new_plane_state);
 268 }
 269
 270 static struct intel_crtc *
 271 get_crtc_from_states(const struct intel_plane_state *old_plane_state,
 272                      const struct intel_plane_state *new_plane_state)
 273 {
 274         if (new_plane_state->uapi.crtc)
 275                 return to_intel_crtc(new_plane_state->uapi.crtc);
 276
 277         if (old_plane_state->uapi.crtc)
 278                 return to_intel_crtc(old_plane_state->uapi.crtc);
 279
 280         return NULL;
 281 }
 282
 283 int intel_plane_atomic_check(struct intel_atomic_state *state,
 284                              struct intel_plane *plane)
 285 {
 286         struct intel_plane_state *new_plane_state =
 287                 intel_atomic_get_new_plane_state(state, plane);
 288         const struct intel_plane_state *old_plane_state =
 289                 intel_atomic_get_old_plane_state(state, plane);
 290         struct intel_crtc *crtc =
 291                 get_crtc_from_states(old_plane_state, new_plane_state);
 292         const struct intel_crtc_state *old_crtc_state;
 293         struct intel_crtc_state *new_crtc_state;
 294
 295         new_plane_state->uapi.visible = false;
 296         if (!crtc)
 297                 return 0;
 298
 299         old_crtc_state = intel_atomic_get_old_crtc_state(state, crtc);
 300         new_crtc_state = intel_atomic_get_new_crtc_state(state, crtc);
 301
 302         return intel_plane_atomic_check_with_state(old_crtc_state,
 303                                                    new_crtc_state,
 304                                                    old_plane_state,
 305                                                    new_plane_state);
 306 }
 307
 308 static struct intel_plane *
 309 skl_next_plane_to_commit(struct intel_atomic_state *state,
 310                          struct intel_crtc *crtc,
 311                          struct skl_ddb_entry entries_y[I915_MAX_PLANES],
 312                          struct skl_ddb_entry entries_uv[I915_MAX_PLANES],
 313                          unsigned int *update_mask)
 314 {
 315         struct intel_crtc_state *crtc_state =
 316                 intel_atomic_get_new_crtc_state(state, crtc);
 317         struct intel_plane_state *plane_state;
 318         struct intel_plane *plane;
 319         int i;
 320
 321         if (*update_mask == 0)
 322                 return NULL;
 323
 324         for_each_new_intel_plane_in_state(state, plane, plane_state, i) {
 325                 enum plane_id plane_id = plane->id;
 326
 327                 if (crtc->pipe != plane->pipe ||
 328                     !(*update_mask & BIT(plane_id)))
 329                         continue;
 330
 331                 if (skl_ddb_allocation_overlaps(&crtc_state->wm.skl.plane_ddb_y[plane_id],
 332                                                 entries_y,
 333                                                 I915_MAX_PLANES, plane_id) ||
 334                     skl_ddb_allocation_overlaps(&crtc_state->wm.skl.plane_ddb_uv[plane_id],
 335                                                 entries_uv,
 336                                                 I915_MAX_PLANES, plane_id))
 337                         continue;
 338
 339                 *update_mask &= ~BIT(plane_id);
 340                 entries_y[plane_id] = crtc_state->wm.skl.plane_ddb_y[plane_id];
 341                 entries_uv[plane_id] = crtc_state->wm.skl.plane_ddb_uv[plane_id];
 342
 343                 return plane;
 344         }
 345
 346         /* should never happen */
 347         WARN_ON(1);
 348
 349         return NULL;
 350 }
 351
 352 void intel_update_plane(struct intel_plane *plane,
 353                         const struct intel_crtc_state *crtc_state,
 354                         const struct intel_plane_state *plane_state)
 355 {
 356         struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 357
 358         trace_intel_update_plane(&plane->base, crtc);
 359         plane->update_plane(plane, crtc_state, plane_state);
 360 }
 361
 362 void intel_disable_plane(struct intel_plane *plane,
 363                          const struct intel_crtc_state *crtc_state)
 364 {
 365         struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 366
 367         trace_intel_disable_plane(&plane->base, crtc);
 368         plane->disable_plane(plane, crtc_state);
 369 }
 370
 371 void skl_update_planes_on_crtc(struct intel_atomic_state *state,
 372                                struct intel_crtc *crtc)
 373 {
 374         struct intel_crtc_state *old_crtc_state =
 375                 intel_atomic_get_old_crtc_state(state, crtc);
 376         struct intel_crtc_state *new_crtc_state =
 377                 intel_atomic_get_new_crtc_state(state, crtc);
 378         struct skl_ddb_entry entries_y[I915_MAX_PLANES];
 379         struct skl_ddb_entry entries_uv[I915_MAX_PLANES];
 380         u32 update_mask = new_crtc_state->update_planes;
 381         struct intel_plane *plane;
 382
 383         memcpy(entries_y, old_crtc_state->wm.skl.plane_ddb_y,
 384                sizeof(old_crtc_state->wm.skl.plane_ddb_y));
 385         memcpy(entries_uv, old_crtc_state->wm.skl.plane_ddb_uv,
 386                sizeof(old_crtc_state->wm.skl.plane_ddb_uv));
 387
 388         while ((plane = skl_next_plane_to_commit(state, crtc,
 389                                                  entries_y, entries_uv,
 390                                                  &update_mask))) {
 391                 struct intel_plane_state *new_plane_state =
 392                         intel_atomic_get_new_plane_state(state, plane);
 393
 394                 if (new_plane_state->uapi.visible ||
 395                     new_plane_state->planar_slave) {
 396                         intel_update_plane(plane, new_crtc_state, new_plane_state);
 397                 } else {
 398                         intel_disable_plane(plane, new_crtc_state);
 399                 }
 400         }
 401 }
 402
 403 void i9xx_update_planes_on_crtc(struct intel_atomic_state *state,
 404                                 struct intel_crtc *crtc)
 405 {
 406         struct intel_crtc_state *new_crtc_state =
 407                 intel_atomic_get_new_crtc_state(state, crtc);
 408         u32 update_mask = new_crtc_state->update_planes;
 409         struct intel_plane_state *new_plane_state;
 410         struct intel_plane *plane;
 411         int i;
 412
 413         for_each_new_intel_plane_in_state(state, plane, new_plane_state, i) {
 414                 if (crtc->pipe != plane->pipe ||
 415                     !(update_mask & BIT(plane->id)))
 416                         continue;
 417
 418                 if (new_plane_state->uapi.visible)
 419                         intel_update_plane(plane, new_crtc_state, new_plane_state);
 420                 else
 421                         intel_disable_plane(plane, new_crtc_state);
 422         }
 423 }
 424
 425 const struct drm_plane_helper_funcs intel_plane_helper_funcs = {
 426         .prepare_fb = intel_prepare_plane_fb,
 427         .cleanup_fb = intel_cleanup_plane_fb,
 428 };