root/drivers/gpu/drm/i915/display/intel_atomic.c

DEFINITIONS

1. intel_digital_connector_atomic_get_property
2. intel_digital_connector_atomic_set_property
3. blob_equal
4. intel_digital_connector_atomic_check
5. intel_digital_connector_duplicate_state
6. intel_crtc_duplicate_state
7. intel_crtc_destroy_state
8. intel_atomic_setup_scaler
9. intel_atomic_setup_scalers
10. intel_atomic_state_alloc
11. intel_atomic_state_clear
12. intel_atomic_get_crtc_state

   1 /*
   2  * Copyright © 2015 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 modeset support
  26  *
  27  * The functions here implement the state management and hardware programming
  28  * dispatch required by the atomic modeset infrastructure.
  29  * See intel_atomic_plane.c for the plane-specific atomic functionality.
  30  */
  31 
  32 #include <drm/drm_atomic.h>
  33 #include <drm/drm_atomic_helper.h>
  34 #include <drm/drm_fourcc.h>
  35 #include <drm/drm_plane_helper.h>
  36 
  37 #include "intel_atomic.h"
  38 #include "intel_display_types.h"
  39 #include "intel_hdcp.h"
  40 #include "intel_sprite.h"
  41 
  42 /**
  43  * intel_digital_connector_atomic_get_property - hook for connector->atomic_get_property.
  44  * @connector: Connector to get the property for.
  45  * @state: Connector state to retrieve the property from.
  46  * @property: Property to retrieve.
  47  * @val: Return value for the property.
  48  *
  49  * Returns the atomic property value for a digital connector.
  50  */
  51 int intel_digital_connector_atomic_get_property(struct drm_connector *connector,
  52                                                 const struct drm_connector_state *state,
  53                                                 struct drm_property *property,
  54                                                 u64 *val)
  55 {
  56         struct drm_device *dev = connector->dev;
  57         struct drm_i915_private *dev_priv = to_i915(dev);
  58         struct intel_digital_connector_state *intel_conn_state =
  59                 to_intel_digital_connector_state(state);
  60 
  61         if (property == dev_priv->force_audio_property)
  62                 *val = intel_conn_state->force_audio;
  63         else if (property == dev_priv->broadcast_rgb_property)
  64                 *val = intel_conn_state->broadcast_rgb;
  65         else {
  66                 DRM_DEBUG_ATOMIC("Unknown property [PROP:%d:%s]\n",
  67                                  property->base.id, property->name);
  68                 return -EINVAL;
  69         }
  70 
  71         return 0;
  72 }
  73 
  74 /**
  75  * intel_digital_connector_atomic_set_property - hook for connector->atomic_set_property.
  76  * @connector: Connector to set the property for.
  77  * @state: Connector state to set the property on.
  78  * @property: Property to set.
  79  * @val: New value for the property.
  80  *
  81  * Sets the atomic property value for a digital connector.
  82  */
  83 int intel_digital_connector_atomic_set_property(struct drm_connector *connector,
  84                                                 struct drm_connector_state *state,
  85                                                 struct drm_property *property,
  86                                                 u64 val)
  87 {
  88         struct drm_device *dev = connector->dev;
  89         struct drm_i915_private *dev_priv = to_i915(dev);
  90         struct intel_digital_connector_state *intel_conn_state =
  91                 to_intel_digital_connector_state(state);
  92 
  93         if (property == dev_priv->force_audio_property) {
  94                 intel_conn_state->force_audio = val;
  95                 return 0;
  96         }
  97 
  98         if (property == dev_priv->broadcast_rgb_property) {
  99                 intel_conn_state->broadcast_rgb = val;
 100                 return 0;
 101         }
 102 
 103         DRM_DEBUG_ATOMIC("Unknown property [PROP:%d:%s]\n",
 104                          property->base.id, property->name);
 105         return -EINVAL;
 106 }
 107 
 108 static bool blob_equal(const struct drm_property_blob *a,
 109                        const struct drm_property_blob *b)
 110 {
 111         if (a && b)
 112                 return a->length == b->length &&
 113                         !memcmp(a->data, b->data, a->length);
 114 
 115         return !a == !b;
 116 }
 117 
 118 int intel_digital_connector_atomic_check(struct drm_connector *conn,
 119                                          struct drm_atomic_state *state)
 120 {
 121         struct drm_connector_state *new_state =
 122                 drm_atomic_get_new_connector_state(state, conn);
 123         struct intel_digital_connector_state *new_conn_state =
 124                 to_intel_digital_connector_state(new_state);
 125         struct drm_connector_state *old_state =
 126                 drm_atomic_get_old_connector_state(state, conn);
 127         struct intel_digital_connector_state *old_conn_state =
 128                 to_intel_digital_connector_state(old_state);
 129         struct drm_crtc_state *crtc_state;
 130 
 131         intel_hdcp_atomic_check(conn, old_state, new_state);
 132 
 133         if (!new_state->crtc)
 134                 return 0;
 135 
 136         crtc_state = drm_atomic_get_new_crtc_state(state, new_state->crtc);
 137 
 138         /*
 139          * These properties are handled by fastset, and might not end
 140          * up in a modeset.
 141          */
 142         if (new_conn_state->force_audio != old_conn_state->force_audio ||
 143             new_conn_state->broadcast_rgb != old_conn_state->broadcast_rgb ||
 144             new_conn_state->base.colorspace != old_conn_state->base.colorspace ||
 145             new_conn_state->base.picture_aspect_ratio != old_conn_state->base.picture_aspect_ratio ||
 146             new_conn_state->base.content_type != old_conn_state->base.content_type ||
 147             new_conn_state->base.scaling_mode != old_conn_state->base.scaling_mode ||
 148             !blob_equal(new_conn_state->base.hdr_output_metadata,
 149                         old_conn_state->base.hdr_output_metadata))
 150                 crtc_state->mode_changed = true;
 151 
 152         return 0;
 153 }
 154 
 155 /**
 156  * intel_digital_connector_duplicate_state - duplicate connector state
 157  * @connector: digital connector
 158  *
 159  * Allocates and returns a copy of the connector state (both common and
 160  * digital connector specific) for the specified connector.
 161  *
 162  * Returns: The newly allocated connector state, or NULL on failure.
 163  */
 164 struct drm_connector_state *
 165 intel_digital_connector_duplicate_state(struct drm_connector *connector)
 166 {
 167         struct intel_digital_connector_state *state;
 168 
 169         state = kmemdup(connector->state, sizeof(*state), GFP_KERNEL);
 170         if (!state)
 171                 return NULL;
 172 
 173         __drm_atomic_helper_connector_duplicate_state(connector, &state->base);
 174         return &state->base;
 175 }
 176 
 177 /**
 178  * intel_crtc_duplicate_state - duplicate crtc state
 179  * @crtc: drm crtc
 180  *
 181  * Allocates and returns a copy of the crtc state (both common and
 182  * Intel-specific) for the specified crtc.
 183  *
 184  * Returns: The newly allocated crtc state, or NULL on failure.
 185  */
 186 struct drm_crtc_state *
 187 intel_crtc_duplicate_state(struct drm_crtc *crtc)
 188 {
 189         struct intel_crtc_state *crtc_state;
 190 
 191         crtc_state = kmemdup(crtc->state, sizeof(*crtc_state), GFP_KERNEL);
 192         if (!crtc_state)
 193                 return NULL;
 194 
 195         __drm_atomic_helper_crtc_duplicate_state(crtc, &crtc_state->base);
 196 
 197         crtc_state->update_pipe = false;
 198         crtc_state->disable_lp_wm = false;
 199         crtc_state->disable_cxsr = false;
 200         crtc_state->update_wm_pre = false;
 201         crtc_state->update_wm_post = false;
 202         crtc_state->fb_changed = false;
 203         crtc_state->fifo_changed = false;
 204         crtc_state->preload_luts = false;
 205         crtc_state->wm.need_postvbl_update = false;
 206         crtc_state->fb_bits = 0;
 207         crtc_state->update_planes = 0;
 208 
 209         return &crtc_state->base;
 210 }
 211 
 212 /**
 213  * intel_crtc_destroy_state - destroy crtc state
 214  * @crtc: drm crtc
 215  * @state: the state to destroy
 216  *
 217  * Destroys the crtc state (both common and Intel-specific) for the
 218  * specified crtc.
 219  */
 220 void
 221 intel_crtc_destroy_state(struct drm_crtc *crtc,
 222                          struct drm_crtc_state *state)
 223 {
 224         drm_atomic_helper_crtc_destroy_state(crtc, state);
 225 }
 226 
 227 static void intel_atomic_setup_scaler(struct intel_crtc_scaler_state *scaler_state,
 228                                       int num_scalers_need, struct intel_crtc *intel_crtc,
 229                                       const char *name, int idx,
 230                                       struct intel_plane_state *plane_state,
 231                                       int *scaler_id)
 232 {
 233         struct drm_i915_private *dev_priv = to_i915(intel_crtc->base.dev);
 234         int j;
 235         u32 mode;
 236 
 237         if (*scaler_id < 0) {
 238                 /* find a free scaler */
 239                 for (j = 0; j < intel_crtc->num_scalers; j++) {
 240                         if (scaler_state->scalers[j].in_use)
 241                                 continue;
 242 
 243                         *scaler_id = j;
 244                         scaler_state->scalers[*scaler_id].in_use = 1;
 245                         break;
 246                 }
 247         }
 248 
 249         if (WARN(*scaler_id < 0, "Cannot find scaler for %s:%d\n", name, idx))
 250                 return;
 251 
 252         /* set scaler mode */
 253         if (plane_state && plane_state->base.fb &&
 254             plane_state->base.fb->format->is_yuv &&
 255             plane_state->base.fb->format->num_planes > 1) {
 256                 struct intel_plane *plane = to_intel_plane(plane_state->base.plane);
 257                 if (IS_GEN(dev_priv, 9) &&
 258                     !IS_GEMINILAKE(dev_priv)) {
 259                         mode = SKL_PS_SCALER_MODE_NV12;
 260                 } else if (icl_is_hdr_plane(dev_priv, plane->id)) {
 261                         /*
 262                          * On gen11+'s HDR planes we only use the scaler for
 263                          * scaling. They have a dedicated chroma upsampler, so
 264                          * we don't need the scaler to upsample the UV plane.
 265                          */
 266                         mode = PS_SCALER_MODE_NORMAL;
 267                 } else {
 268                         mode = PS_SCALER_MODE_PLANAR;
 269 
 270                         if (plane_state->linked_plane)
 271                                 mode |= PS_PLANE_Y_SEL(plane_state->linked_plane->id);
 272                 }
 273         } else if (INTEL_GEN(dev_priv) > 9 || IS_GEMINILAKE(dev_priv)) {
 274                 mode = PS_SCALER_MODE_NORMAL;
 275         } else if (num_scalers_need == 1 && intel_crtc->num_scalers > 1) {
 276                 /*
 277                  * when only 1 scaler is in use on a pipe with 2 scalers
 278                  * scaler 0 operates in high quality (HQ) mode.
 279                  * In this case use scaler 0 to take advantage of HQ mode
 280                  */
 281                 scaler_state->scalers[*scaler_id].in_use = 0;
 282                 *scaler_id = 0;
 283                 scaler_state->scalers[0].in_use = 1;
 284                 mode = SKL_PS_SCALER_MODE_HQ;
 285         } else {
 286                 mode = SKL_PS_SCALER_MODE_DYN;
 287         }
 288 
 289         DRM_DEBUG_KMS("Attached scaler id %u.%u to %s:%d\n",
 290                       intel_crtc->pipe, *scaler_id, name, idx);
 291         scaler_state->scalers[*scaler_id].mode = mode;
 292 }
 293 
 294 /**
 295  * intel_atomic_setup_scalers() - setup scalers for crtc per staged requests
 296  * @dev_priv: i915 device
 297  * @intel_crtc: intel crtc
 298  * @crtc_state: incoming crtc_state to validate and setup scalers
 299  *
 300  * This function sets up scalers based on staged scaling requests for
 301  * a @crtc and its planes. It is called from crtc level check path. If request
 302  * is a supportable request, it attaches scalers to requested planes and crtc.
 303  *
 304  * This function takes into account the current scaler(s) in use by any planes
 305  * not being part of this atomic state
 306  *
 307  *  Returns:
 308  *         0 - scalers were setup succesfully
 309  *         error code - otherwise
 310  */
 311 int intel_atomic_setup_scalers(struct drm_i915_private *dev_priv,
 312                                struct intel_crtc *intel_crtc,
 313                                struct intel_crtc_state *crtc_state)
 314 {
 315         struct drm_plane *plane = NULL;
 316         struct intel_plane *intel_plane;
 317         struct intel_plane_state *plane_state = NULL;
 318         struct intel_crtc_scaler_state *scaler_state =
 319                 &crtc_state->scaler_state;
 320         struct drm_atomic_state *drm_state = crtc_state->base.state;
 321         struct intel_atomic_state *intel_state = to_intel_atomic_state(drm_state);
 322         int num_scalers_need;
 323         int i;
 324 
 325         num_scalers_need = hweight32(scaler_state->scaler_users);
 326 
 327         /*
 328          * High level flow:
 329          * - staged scaler requests are already in scaler_state->scaler_users
 330          * - check whether staged scaling requests can be supported
 331          * - add planes using scalers that aren't in current transaction
 332          * - assign scalers to requested users
 333          * - as part of plane commit, scalers will be committed
 334          *   (i.e., either attached or detached) to respective planes in hw
 335          * - as part of crtc_commit, scaler will be either attached or detached
 336          *   to crtc in hw
 337          */
 338 
 339         /* fail if required scalers > available scalers */
 340         if (num_scalers_need > intel_crtc->num_scalers){
 341                 DRM_DEBUG_KMS("Too many scaling requests %d > %d\n",
 342                         num_scalers_need, intel_crtc->num_scalers);
 343                 return -EINVAL;
 344         }
 345 
 346         /* walkthrough scaler_users bits and start assigning scalers */
 347         for (i = 0; i < sizeof(scaler_state->scaler_users) * 8; i++) {
 348                 int *scaler_id;
 349                 const char *name;
 350                 int idx;
 351 
 352                 /* skip if scaler not required */
 353                 if (!(scaler_state->scaler_users & (1 << i)))
 354                         continue;
 355 
 356                 if (i == SKL_CRTC_INDEX) {
 357                         name = "CRTC";
 358                         idx = intel_crtc->base.base.id;
 359 
 360                         /* panel fitter case: assign as a crtc scaler */
 361                         scaler_id = &scaler_state->scaler_id;
 362                 } else {
 363                         name = "PLANE";
 364 
 365                         /* plane scaler case: assign as a plane scaler */
 366                         /* find the plane that set the bit as scaler_user */
 367                         plane = drm_state->planes[i].ptr;
 368 
 369                         /*
 370                          * to enable/disable hq mode, add planes that are using scaler
 371                          * into this transaction
 372                          */
 373                         if (!plane) {
 374                                 struct drm_plane_state *state;
 375                                 plane = drm_plane_from_index(&dev_priv->drm, i);
 376                                 state = drm_atomic_get_plane_state(drm_state, plane);
 377                                 if (IS_ERR(state)) {
 378                                         DRM_DEBUG_KMS("Failed to add [PLANE:%d] to drm_state\n",
 379                                                 plane->base.id);
 380                                         return PTR_ERR(state);
 381                                 }
 382 
 383                                 /*
 384                                  * the plane is added after plane checks are run,
 385                                  * but since this plane is unchanged just do the
 386                                  * minimum required validation.
 387                                  */
 388                                 crtc_state->base.planes_changed = true;
 389                         }
 390 
 391                         intel_plane = to_intel_plane(plane);
 392                         idx = plane->base.id;
 393 
 394                         /* plane on different crtc cannot be a scaler user of this crtc */
 395                         if (WARN_ON(intel_plane->pipe != intel_crtc->pipe))
 396                                 continue;
 397 
 398                         plane_state = intel_atomic_get_new_plane_state(intel_state,
 399                                                                        intel_plane);
 400                         scaler_id = &plane_state->scaler_id;
 401                 }
 402 
 403                 intel_atomic_setup_scaler(scaler_state, num_scalers_need,
 404                                           intel_crtc, name, idx,
 405                                           plane_state, scaler_id);
 406         }
 407 
 408         return 0;
 409 }
 410 
 411 struct drm_atomic_state *
 412 intel_atomic_state_alloc(struct drm_device *dev)
 413 {
 414         struct intel_atomic_state *state = kzalloc(sizeof(*state), GFP_KERNEL);
 415 
 416         if (!state || drm_atomic_state_init(dev, &state->base) < 0) {
 417                 kfree(state);
 418                 return NULL;
 419         }
 420 
 421         return &state->base;
 422 }
 423 
 424 void intel_atomic_state_clear(struct drm_atomic_state *s)
 425 {
 426         struct intel_atomic_state *state = to_intel_atomic_state(s);
 427         drm_atomic_state_default_clear(&state->base);
 428         state->dpll_set = state->modeset = false;
 429 }
 430 
 431 struct intel_crtc_state *
 432 intel_atomic_get_crtc_state(struct drm_atomic_state *state,
 433                             struct intel_crtc *crtc)
 434 {
 435         struct drm_crtc_state *crtc_state;
 436         crtc_state = drm_atomic_get_crtc_state(state, &crtc->base);
 437         if (IS_ERR(crtc_state))
 438                 return ERR_CAST(crtc_state);
 439 
 440         return to_intel_crtc_state(crtc_state);
 441 }