drivers/gpu/drm/i915/intel_atomic.c

   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/drmP.h>
  33 #include <drm/drm_atomic.h>
  34 #include <drm/drm_atomic_helper.h>
  35 #include <drm/drm_plane_helper.h>
  36 #include "intel_drv.h"
  37
  38 /**
  39  * intel_digital_connector_atomic_get_property - hook for connector->atomic_get_property.
  40  * @connector: Connector to get the property for.
  41  * @state: Connector state to retrieve the property from.
  42  * @property: Property to retrieve.
  43  * @val: Return value for the property.
  44  *
  45  * Returns the atomic property value for a digital connector.
  46  */
  47 int intel_digital_connector_atomic_get_property(struct drm_connector *connector,
  48                                                 const struct drm_connector_state *state,
  49                                                 struct drm_property *property,
  50                                                 uint64_t *val)
  51 {
  52         struct drm_device *dev = connector->dev;
  53         struct drm_i915_private *dev_priv = to_i915(dev);
  54         struct intel_digital_connector_state *intel_conn_state =
  55                 to_intel_digital_connector_state(state);
  56
  57         if (property == dev_priv->force_audio_property)
  58                 *val = intel_conn_state->force_audio;
  59         else if (property == dev_priv->broadcast_rgb_property)
  60                 *val = intel_conn_state->broadcast_rgb;
  61         else {
  62                 DRM_DEBUG_ATOMIC("Unknown property %s\n", property->name);
  63                 return -EINVAL;
  64         }
  65
  66         return 0;
  67 }
  68
  69 /**
  70  * intel_digital_connector_atomic_set_property - hook for connector->atomic_set_property.
  71  * @connector: Connector to set the property for.
  72  * @state: Connector state to set the property on.
  73  * @property: Property to set.
  74  * @val: New value for the property.
  75  *
  76  * Sets the atomic property value for a digital connector.
  77  */
  78 int intel_digital_connector_atomic_set_property(struct drm_connector *connector,
  79                                                 struct drm_connector_state *state,
  80                                                 struct drm_property *property,
  81                                                 uint64_t val)
  82 {
  83         struct drm_device *dev = connector->dev;
  84         struct drm_i915_private *dev_priv = to_i915(dev);
  85         struct intel_digital_connector_state *intel_conn_state =
  86                 to_intel_digital_connector_state(state);
  87
  88         if (property == dev_priv->force_audio_property) {
  89                 intel_conn_state->force_audio = val;
  90                 return 0;
  91         }
  92
  93         if (property == dev_priv->broadcast_rgb_property) {
  94                 intel_conn_state->broadcast_rgb = val;
  95                 return 0;
  96         }
  97
  98         DRM_DEBUG_ATOMIC("Unknown property %s\n", property->name);
  99         return -EINVAL;
 100 }
 101
 102 int intel_digital_connector_atomic_check(struct drm_connector *conn,
 103                                          struct drm_connector_state *new_state)
 104 {
 105         struct intel_digital_connector_state *new_conn_state =
 106                 to_intel_digital_connector_state(new_state);
 107         struct drm_connector_state *old_state =
 108                 drm_atomic_get_old_connector_state(new_state->state, conn);
 109         struct intel_digital_connector_state *old_conn_state =
 110                 to_intel_digital_connector_state(old_state);
 111         struct drm_crtc_state *crtc_state;
 112
 113         if (!new_state->crtc)
 114                 return 0;
 115
 116         crtc_state = drm_atomic_get_new_crtc_state(new_state->state, new_state->crtc);
 117
 118         /*
 119          * These properties are handled by fastset, and might not end
 120          * up in a modeset.
 121          */
 122         if (new_conn_state->force_audio != old_conn_state->force_audio ||
 123             new_conn_state->broadcast_rgb != old_conn_state->broadcast_rgb ||
 124             new_conn_state->base.picture_aspect_ratio != old_conn_state->base.picture_aspect_ratio ||
 125             new_conn_state->base.scaling_mode != old_conn_state->base.scaling_mode)
 126                 crtc_state->mode_changed = true;
 127
 128         return 0;
 129 }
 130
 131 /**
 132  * intel_digital_connector_duplicate_state - duplicate connector state
 133  * @connector: digital connector
 134  *
 135  * Allocates and returns a copy of the connector state (both common and
 136  * digital connector specific) for the specified connector.
 137  *
 138  * Returns: The newly allocated connector state, or NULL on failure.
 139  */
 140 struct drm_connector_state *
 141 intel_digital_connector_duplicate_state(struct drm_connector *connector)
 142 {
 143         struct intel_digital_connector_state *state;
 144
 145         state = kmemdup(connector->state, sizeof(*state), GFP_KERNEL);
 146         if (!state)
 147                 return NULL;
 148
 149         __drm_atomic_helper_connector_duplicate_state(connector, &state->base);
 150         return &state->base;
 151 }
 152
 153 /**
 154  * intel_crtc_duplicate_state - duplicate crtc state
 155  * @crtc: drm crtc
 156  *
 157  * Allocates and returns a copy of the crtc state (both common and
 158  * Intel-specific) for the specified crtc.
 159  *
 160  * Returns: The newly allocated crtc state, or NULL on failure.
 161  */
 162 struct drm_crtc_state *
 163 intel_crtc_duplicate_state(struct drm_crtc *crtc)
 164 {
 165         struct intel_crtc_state *crtc_state;
 166
 167         crtc_state = kmemdup(crtc->state, sizeof(*crtc_state), GFP_KERNEL);
 168         if (!crtc_state)
 169                 return NULL;
 170
 171         __drm_atomic_helper_crtc_duplicate_state(crtc, &crtc_state->base);
 172
 173         crtc_state->update_pipe = false;
 174         crtc_state->disable_lp_wm = false;
 175         crtc_state->disable_cxsr = false;
 176         crtc_state->update_wm_pre = false;
 177         crtc_state->update_wm_post = false;
 178         crtc_state->fb_changed = false;
 179         crtc_state->fifo_changed = false;
 180         crtc_state->wm.need_postvbl_update = false;
 181         crtc_state->fb_bits = 0;
 182
 183         return &crtc_state->base;
 184 }
 185
 186 /**
 187  * intel_crtc_destroy_state - destroy crtc state
 188  * @crtc: drm crtc
 189  *
 190  * Destroys the crtc state (both common and Intel-specific) for the
 191  * specified crtc.
 192  */
 193 void
 194 intel_crtc_destroy_state(struct drm_crtc *crtc,
 195                           struct drm_crtc_state *state)
 196 {
 197         drm_atomic_helper_crtc_destroy_state(crtc, state);
 198 }
 199
 200 /**
 201  * intel_atomic_setup_scalers() - setup scalers for crtc per staged requests
 202  * @dev_priv: i915 device
 203  * @crtc: intel crtc
 204  * @crtc_state: incoming crtc_state to validate and setup scalers
 205  *
 206  * This function sets up scalers based on staged scaling requests for
 207  * a @crtc and its planes. It is called from crtc level check path. If request
 208  * is a supportable request, it attaches scalers to requested planes and crtc.
 209  *
 210  * This function takes into account the current scaler(s) in use by any planes
 211  * not being part of this atomic state
 212  *
 213  *  Returns:
 214  *         0 - scalers were setup succesfully
 215  *         error code - otherwise
 216  */
 217 int intel_atomic_setup_scalers(struct drm_i915_private *dev_priv,
 218                                struct intel_crtc *intel_crtc,
 219                                struct intel_crtc_state *crtc_state)
 220 {
 221         struct drm_plane *plane = NULL;
 222         struct intel_plane *intel_plane;
 223         struct intel_plane_state *plane_state = NULL;
 224         struct intel_crtc_scaler_state *scaler_state =
 225                 &crtc_state->scaler_state;
 226         struct drm_atomic_state *drm_state = crtc_state->base.state;
 227         int num_scalers_need;
 228         int i, j;
 229
 230         num_scalers_need = hweight32(scaler_state->scaler_users);
 231
 232         /*
 233          * High level flow:
 234          * - staged scaler requests are already in scaler_state->scaler_users
 235          * - check whether staged scaling requests can be supported
 236          * - add planes using scalers that aren't in current transaction
 237          * - assign scalers to requested users
 238          * - as part of plane commit, scalers will be committed
 239          *   (i.e., either attached or detached) to respective planes in hw
 240          * - as part of crtc_commit, scaler will be either attached or detached
 241          *   to crtc in hw
 242          */
 243
 244         /* fail if required scalers > available scalers */
 245         if (num_scalers_need > intel_crtc->num_scalers){
 246                 DRM_DEBUG_KMS("Too many scaling requests %d > %d\n",
 247                         num_scalers_need, intel_crtc->num_scalers);
 248                 return -EINVAL;
 249         }
 250
 251         /* walkthrough scaler_users bits and start assigning scalers */
 252         for (i = 0; i < sizeof(scaler_state->scaler_users) * 8; i++) {
 253                 int *scaler_id;
 254                 const char *name;
 255                 int idx;
 256
 257                 /* skip if scaler not required */
 258                 if (!(scaler_state->scaler_users & (1 << i)))
 259                         continue;
 260
 261                 if (i == SKL_CRTC_INDEX) {
 262                         name = "CRTC";
 263                         idx = intel_crtc->base.base.id;
 264
 265                         /* panel fitter case: assign as a crtc scaler */
 266                         scaler_id = &scaler_state->scaler_id;
 267                 } else {
 268                         name = "PLANE";
 269
 270                         /* plane scaler case: assign as a plane scaler */
 271                         /* find the plane that set the bit as scaler_user */
 272                         plane = drm_state->planes[i].ptr;
 273
 274                         /*
 275                          * to enable/disable hq mode, add planes that are using scaler
 276                          * into this transaction
 277                          */
 278                         if (!plane) {
 279                                 struct drm_plane_state *state;
 280                                 plane = drm_plane_from_index(&dev_priv->drm, i);
 281                                 state = drm_atomic_get_plane_state(drm_state, plane);
 282                                 if (IS_ERR(state)) {
 283                                         DRM_DEBUG_KMS("Failed to add [PLANE:%d] to drm_state\n",
 284                                                 plane->base.id);
 285                                         return PTR_ERR(state);
 286                                 }
 287
 288                                 /*
 289                                  * the plane is added after plane checks are run,
 290                                  * but since this plane is unchanged just do the
 291                                  * minimum required validation.
 292                                  */
 293                                 crtc_state->base.planes_changed = true;
 294                         }
 295
 296                         intel_plane = to_intel_plane(plane);
 297                         idx = plane->base.id;
 298
 299                         /* plane on different crtc cannot be a scaler user of this crtc */
 300                         if (WARN_ON(intel_plane->pipe != intel_crtc->pipe)) {
 301                                 continue;
 302                         }
 303
 304                         plane_state = intel_atomic_get_existing_plane_state(drm_state,
 305                                                                             intel_plane);
 306                         scaler_id = &plane_state->scaler_id;
 307                 }
 308
 309                 if (*scaler_id < 0) {
 310                         /* find a free scaler */
 311                         for (j = 0; j < intel_crtc->num_scalers; j++) {
 312                                 if (!scaler_state->scalers[j].in_use) {
 313                                         scaler_state->scalers[j].in_use = 1;
 314                                         *scaler_id = j;
 315                                         DRM_DEBUG_KMS("Attached scaler id %u.%u to %s:%d\n",
 316                                                 intel_crtc->pipe, *scaler_id, name, idx);
 317                                         break;
 318                                 }
 319                         }
 320                 }
 321
 322                 if (WARN_ON(*scaler_id < 0)) {
 323                         DRM_DEBUG_KMS("Cannot find scaler for %s:%d\n", name, idx);
 324                         continue;
 325                 }
 326
 327                 /* set scaler mode */
 328                 if (IS_GEMINILAKE(dev_priv) || IS_CANNONLAKE(dev_priv)) {
 329                         scaler_state->scalers[*scaler_id].mode = 0;
 330                 } else if (num_scalers_need == 1 && intel_crtc->pipe != PIPE_C) {
 331                         /*
 332                          * when only 1 scaler is in use on either pipe A or B,
 333                          * scaler 0 operates in high quality (HQ) mode.
 334                          * In this case use scaler 0 to take advantage of HQ mode
 335                          */
 336                         *scaler_id = 0;
 337                         scaler_state->scalers[0].in_use = 1;
 338                         scaler_state->scalers[0].mode = PS_SCALER_MODE_HQ;
 339                         scaler_state->scalers[1].in_use = 0;
 340                 } else {
 341                         scaler_state->scalers[*scaler_id].mode = PS_SCALER_MODE_DYN;
 342                 }
 343         }
 344
 345         return 0;
 346 }
 347
 348 struct drm_atomic_state *
 349 intel_atomic_state_alloc(struct drm_device *dev)
 350 {
 351         struct intel_atomic_state *state = kzalloc(sizeof(*state), GFP_KERNEL);
 352
 353         if (!state || drm_atomic_state_init(dev, &state->base) < 0) {
 354                 kfree(state);
 355                 return NULL;
 356         }
 357
 358         return &state->base;
 359 }
 360
 361 void intel_atomic_state_clear(struct drm_atomic_state *s)
 362 {
 363         struct intel_atomic_state *state = to_intel_atomic_state(s);
 364         drm_atomic_state_default_clear(&state->base);
 365         state->dpll_set = state->modeset = false;
 366 }