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 } 367