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      1 /*
      2  * Copyright (C) 2015 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #define LOG_TAG "hwc-drm-resources"
     18 
     19 #include "drmconnector.h"
     20 #include "drmcrtc.h"
     21 #include "drmencoder.h"
     22 #include "drmeventlistener.h"
     23 #include "drmplane.h"
     24 #include "drmresources.h"
     25 
     26 #include <cinttypes>
     27 #include <errno.h>
     28 #include <fcntl.h>
     29 #include <stdint.h>
     30 #include <xf86drm.h>
     31 #include <xf86drmMode.h>
     32 
     33 #include <cutils/log.h>
     34 #include <cutils/properties.h>
     35 
     36 namespace android {
     37 
     38 DrmResources::DrmResources() : compositor_(this), event_listener_(this) {
     39 }
     40 
     41 DrmResources::~DrmResources() {
     42   event_listener_.Exit();
     43 }
     44 
     45 int DrmResources::Init() {
     46   char path[PROPERTY_VALUE_MAX];
     47   property_get("hwc.drm.device", path, "/dev/dri/card0");
     48 
     49   /* TODO: Use drmOpenControl here instead */
     50   fd_.Set(open(path, O_RDWR));
     51   if (fd() < 0) {
     52     ALOGE("Failed to open dri- %s", strerror(-errno));
     53     return -ENODEV;
     54   }
     55 
     56   int ret = drmSetClientCap(fd(), DRM_CLIENT_CAP_UNIVERSAL_PLANES, 1);
     57   if (ret) {
     58     ALOGE("Failed to set universal plane cap %d", ret);
     59     return ret;
     60   }
     61 
     62   ret = drmSetClientCap(fd(), DRM_CLIENT_CAP_ATOMIC, 1);
     63   if (ret) {
     64     ALOGE("Failed to set atomic cap %d", ret);
     65     return ret;
     66   }
     67 
     68   drmModeResPtr res = drmModeGetResources(fd());
     69   if (!res) {
     70     ALOGE("Failed to get DrmResources resources");
     71     return -ENODEV;
     72   }
     73 
     74   min_resolution_ =
     75       std::pair<uint32_t, uint32_t>(res->min_width, res->min_height);
     76   max_resolution_ =
     77       std::pair<uint32_t, uint32_t>(res->max_width, res->max_height);
     78 
     79   bool found_primary = false;
     80   int display_num = 1;
     81 
     82   for (int i = 0; !ret && i < res->count_crtcs; ++i) {
     83     drmModeCrtcPtr c = drmModeGetCrtc(fd(), res->crtcs[i]);
     84     if (!c) {
     85       ALOGE("Failed to get crtc %d", res->crtcs[i]);
     86       ret = -ENODEV;
     87       break;
     88     }
     89 
     90     std::unique_ptr<DrmCrtc> crtc(new DrmCrtc(this, c, i));
     91     drmModeFreeCrtc(c);
     92 
     93     ret = crtc->Init();
     94     if (ret) {
     95       ALOGE("Failed to initialize crtc %d", res->crtcs[i]);
     96       break;
     97     }
     98     crtcs_.emplace_back(std::move(crtc));
     99   }
    100 
    101   for (int i = 0; !ret && i < res->count_encoders; ++i) {
    102     drmModeEncoderPtr e = drmModeGetEncoder(fd(), res->encoders[i]);
    103     if (!e) {
    104       ALOGE("Failed to get encoder %d", res->encoders[i]);
    105       ret = -ENODEV;
    106       break;
    107     }
    108 
    109     std::vector<DrmCrtc *> possible_crtcs;
    110     DrmCrtc *current_crtc = NULL;
    111     for (auto &crtc : crtcs_) {
    112       if ((1 << crtc->pipe()) & e->possible_crtcs)
    113         possible_crtcs.push_back(crtc.get());
    114 
    115       if (crtc->id() == e->crtc_id)
    116         current_crtc = crtc.get();
    117     }
    118 
    119     std::unique_ptr<DrmEncoder> enc(
    120         new DrmEncoder(e, current_crtc, possible_crtcs));
    121 
    122     drmModeFreeEncoder(e);
    123 
    124     encoders_.emplace_back(std::move(enc));
    125   }
    126 
    127   for (int i = 0; !ret && i < res->count_connectors; ++i) {
    128     drmModeConnectorPtr c = drmModeGetConnector(fd(), res->connectors[i]);
    129     if (!c) {
    130       ALOGE("Failed to get connector %d", res->connectors[i]);
    131       ret = -ENODEV;
    132       break;
    133     }
    134 
    135     std::vector<DrmEncoder *> possible_encoders;
    136     DrmEncoder *current_encoder = NULL;
    137     for (int j = 0; j < c->count_encoders; ++j) {
    138       for (auto &encoder : encoders_) {
    139         if (encoder->id() == c->encoders[j])
    140           possible_encoders.push_back(encoder.get());
    141         if (encoder->id() == c->encoder_id)
    142           current_encoder = encoder.get();
    143       }
    144     }
    145 
    146     std::unique_ptr<DrmConnector> conn(
    147         new DrmConnector(this, c, current_encoder, possible_encoders));
    148 
    149     drmModeFreeConnector(c);
    150 
    151     ret = conn->Init();
    152     if (ret) {
    153       ALOGE("Init connector %d failed", res->connectors[i]);
    154       break;
    155     }
    156 
    157     if (conn->built_in() && !found_primary) {
    158       conn->set_display(0);
    159       found_primary = true;
    160     } else {
    161       conn->set_display(display_num);
    162       ++display_num;
    163     }
    164 
    165     connectors_.emplace_back(std::move(conn));
    166   }
    167   if (res)
    168     drmModeFreeResources(res);
    169 
    170   // Catch-all for the above loops
    171   if (ret)
    172     return ret;
    173 
    174   drmModePlaneResPtr plane_res = drmModeGetPlaneResources(fd());
    175   if (!plane_res) {
    176     ALOGE("Failed to get plane resources");
    177     return -ENOENT;
    178   }
    179 
    180   for (uint32_t i = 0; i < plane_res->count_planes; ++i) {
    181     drmModePlanePtr p = drmModeGetPlane(fd(), plane_res->planes[i]);
    182     if (!p) {
    183       ALOGE("Failed to get plane %d", plane_res->planes[i]);
    184       ret = -ENODEV;
    185       break;
    186     }
    187 
    188     std::unique_ptr<DrmPlane> plane(new DrmPlane(this, p));
    189 
    190     drmModeFreePlane(p);
    191 
    192     ret = plane->Init();
    193     if (ret) {
    194       ALOGE("Init plane %d failed", plane_res->planes[i]);
    195       break;
    196     }
    197 
    198     planes_.emplace_back(std::move(plane));
    199   }
    200   drmModeFreePlaneResources(plane_res);
    201   if (ret)
    202     return ret;
    203 
    204   ret = compositor_.Init();
    205   if (ret)
    206     return ret;
    207 
    208   ret = event_listener_.Init();
    209   if (ret) {
    210     ALOGE("Can't initialize event listener %d", ret);
    211     return ret;
    212   }
    213 
    214   for (auto &conn : connectors_) {
    215     ret = CreateDisplayPipe(conn.get());
    216     if (ret) {
    217       ALOGE("Failed CreateDisplayPipe %d with %d", conn->id(), ret);
    218       return ret;
    219     }
    220   }
    221   return 0;
    222 }
    223 
    224 DrmConnector *DrmResources::GetConnectorForDisplay(int display) const {
    225   for (auto &conn : connectors_) {
    226     if (conn->display() == display)
    227       return conn.get();
    228   }
    229   return NULL;
    230 }
    231 
    232 DrmCrtc *DrmResources::GetCrtcForDisplay(int display) const {
    233   for (auto &crtc : crtcs_) {
    234     if (crtc->display() == display)
    235       return crtc.get();
    236   }
    237   return NULL;
    238 }
    239 
    240 DrmPlane *DrmResources::GetPlane(uint32_t id) const {
    241   for (auto &plane : planes_) {
    242     if (plane->id() == id)
    243       return plane.get();
    244   }
    245   return NULL;
    246 }
    247 
    248 uint32_t DrmResources::next_mode_id() {
    249   return ++mode_id_;
    250 }
    251 
    252 int DrmResources::TryEncoderForDisplay(int display, DrmEncoder *enc) {
    253   /* First try to use the currently-bound crtc */
    254   DrmCrtc *crtc = enc->crtc();
    255   if (crtc && crtc->can_bind(display)) {
    256     crtc->set_display(display);
    257     return 0;
    258   }
    259 
    260   /* Try to find a possible crtc which will work */
    261   for (DrmCrtc *crtc : enc->possible_crtcs()) {
    262     /* We've already tried this earlier */
    263     if (crtc == enc->crtc())
    264       continue;
    265 
    266     if (crtc->can_bind(display)) {
    267       enc->set_crtc(crtc);
    268       crtc->set_display(display);
    269       return 0;
    270     }
    271   }
    272 
    273   /* We can't use the encoder, but nothing went wrong, try another one */
    274   return -EAGAIN;
    275 }
    276 
    277 int DrmResources::CreateDisplayPipe(DrmConnector *connector) {
    278   int display = connector->display();
    279   /* Try to use current setup first */
    280   if (connector->encoder()) {
    281     int ret = TryEncoderForDisplay(display, connector->encoder());
    282     if (!ret) {
    283       return 0;
    284     } else if (ret != -EAGAIN) {
    285       ALOGE("Could not set mode %d/%d", display, ret);
    286       return ret;
    287     }
    288   }
    289 
    290   for (DrmEncoder *enc : connector->possible_encoders()) {
    291     int ret = TryEncoderForDisplay(display, enc);
    292     if (!ret) {
    293       connector->set_encoder(enc);
    294       return 0;
    295     } else if (ret != -EAGAIN) {
    296       ALOGE("Could not set mode %d/%d", display, ret);
    297       return ret;
    298     }
    299   }
    300   ALOGE("Could not find a suitable encoder/crtc for display %d",
    301         connector->display());
    302   return -ENODEV;
    303 }
    304 
    305 int DrmResources::CreatePropertyBlob(void *data, size_t length,
    306                                      uint32_t *blob_id) {
    307   struct drm_mode_create_blob create_blob;
    308   memset(&create_blob, 0, sizeof(create_blob));
    309   create_blob.length = length;
    310   create_blob.data = (__u64)data;
    311 
    312   int ret = drmIoctl(fd(), DRM_IOCTL_MODE_CREATEPROPBLOB, &create_blob);
    313   if (ret) {
    314     ALOGE("Failed to create mode property blob %d", ret);
    315     return ret;
    316   }
    317   *blob_id = create_blob.blob_id;
    318   return 0;
    319 }
    320 
    321 int DrmResources::DestroyPropertyBlob(uint32_t blob_id) {
    322   if (!blob_id)
    323     return 0;
    324 
    325   struct drm_mode_destroy_blob destroy_blob;
    326   memset(&destroy_blob, 0, sizeof(destroy_blob));
    327   destroy_blob.blob_id = (__u32)blob_id;
    328   int ret = drmIoctl(fd(), DRM_IOCTL_MODE_DESTROYPROPBLOB, &destroy_blob);
    329   if (ret) {
    330     ALOGE("Failed to destroy mode property blob %" PRIu32 "/%d", blob_id, ret);
    331     return ret;
    332   }
    333   return 0;
    334 }
    335 
    336 int DrmResources::SetDisplayActiveMode(int display, const DrmMode &mode) {
    337   std::unique_ptr<DrmComposition> comp(compositor_.CreateComposition(NULL));
    338   if (!comp) {
    339     ALOGE("Failed to create composition for dpms on %d", display);
    340     return -ENOMEM;
    341   }
    342   int ret = comp->SetDisplayMode(display, mode);
    343   if (ret) {
    344     ALOGE("Failed to add mode to composition on %d %d", display, ret);
    345     return ret;
    346   }
    347   ret = compositor_.QueueComposition(std::move(comp));
    348   if (ret) {
    349     ALOGE("Failed to queue dpms composition on %d %d", display, ret);
    350     return ret;
    351   }
    352   return 0;
    353 }
    354 
    355 int DrmResources::SetDpmsMode(int display, uint64_t mode) {
    356   if (mode != DRM_MODE_DPMS_ON && mode != DRM_MODE_DPMS_OFF) {
    357     ALOGE("Invalid dpms mode %" PRIu64, mode);
    358     return -EINVAL;
    359   }
    360 
    361   std::unique_ptr<DrmComposition> comp(compositor_.CreateComposition(NULL));
    362   if (!comp) {
    363     ALOGE("Failed to create composition for dpms on %d", display);
    364     return -ENOMEM;
    365   }
    366   int ret = comp->SetDpmsMode(display, mode);
    367   if (ret) {
    368     ALOGE("Failed to add dpms %" PRIu64 " to composition on %d %d", mode,
    369           display, ret);
    370     return ret;
    371   }
    372   ret = compositor_.QueueComposition(std::move(comp));
    373   if (ret) {
    374     ALOGE("Failed to queue dpms composition on %d %d", display, ret);
    375     return ret;
    376   }
    377   return 0;
    378 }
    379 
    380 DrmCompositor *DrmResources::compositor() {
    381   return &compositor_;
    382 }
    383 
    384 DrmEventListener *DrmResources::event_listener() {
    385   return &event_listener_;
    386 }
    387 
    388 int DrmResources::GetProperty(uint32_t obj_id, uint32_t obj_type,
    389                               const char *prop_name, DrmProperty *property) {
    390   drmModeObjectPropertiesPtr props;
    391 
    392   props = drmModeObjectGetProperties(fd(), obj_id, obj_type);
    393   if (!props) {
    394     ALOGE("Failed to get properties for %d/%x", obj_id, obj_type);
    395     return -ENODEV;
    396   }
    397 
    398   bool found = false;
    399   for (int i = 0; !found && (size_t)i < props->count_props; ++i) {
    400     drmModePropertyPtr p = drmModeGetProperty(fd(), props->props[i]);
    401     if (!strcmp(p->name, prop_name)) {
    402       property->Init(p, props->prop_values[i]);
    403       found = true;
    404     }
    405     drmModeFreeProperty(p);
    406   }
    407 
    408   drmModeFreeObjectProperties(props);
    409   return found ? 0 : -ENOENT;
    410 }
    411 
    412 int DrmResources::GetPlaneProperty(const DrmPlane &plane, const char *prop_name,
    413                                    DrmProperty *property) {
    414   return GetProperty(plane.id(), DRM_MODE_OBJECT_PLANE, prop_name, property);
    415 }
    416 
    417 int DrmResources::GetCrtcProperty(const DrmCrtc &crtc, const char *prop_name,
    418                                   DrmProperty *property) {
    419   return GetProperty(crtc.id(), DRM_MODE_OBJECT_CRTC, prop_name, property);
    420 }
    421 
    422 int DrmResources::GetConnectorProperty(const DrmConnector &connector,
    423                                        const char *prop_name,
    424                                        DrmProperty *property) {
    425   return GetProperty(connector.id(), DRM_MODE_OBJECT_CONNECTOR, prop_name,
    426                      property);
    427 }
    428 }
    429