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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   bool found_primary = false;
     75   int display_num = 1;
     76 
     77   for (int i = 0; !ret && i < res->count_crtcs; ++i) {
     78     drmModeCrtcPtr c = drmModeGetCrtc(fd(), res->crtcs[i]);
     79     if (!c) {
     80       ALOGE("Failed to get crtc %d", res->crtcs[i]);
     81       ret = -ENODEV;
     82       break;
     83     }
     84 
     85     std::unique_ptr<DrmCrtc> crtc(new DrmCrtc(this, c, i));
     86     drmModeFreeCrtc(c);
     87 
     88     ret = crtc->Init();
     89     if (ret) {
     90       ALOGE("Failed to initialize crtc %d", res->crtcs[i]);
     91       break;
     92     }
     93     crtcs_.emplace_back(std::move(crtc));
     94   }
     95 
     96   for (int i = 0; !ret && i < res->count_encoders; ++i) {
     97     drmModeEncoderPtr e = drmModeGetEncoder(fd(), res->encoders[i]);
     98     if (!e) {
     99       ALOGE("Failed to get encoder %d", res->encoders[i]);
    100       ret = -ENODEV;
    101       break;
    102     }
    103 
    104     std::vector<DrmCrtc *> possible_crtcs;
    105     DrmCrtc *current_crtc = NULL;
    106     for (auto &crtc : crtcs_) {
    107       if ((1 << crtc->pipe()) & e->possible_crtcs)
    108         possible_crtcs.push_back(crtc.get());
    109 
    110       if (crtc->id() == e->crtc_id)
    111         current_crtc = crtc.get();
    112     }
    113 
    114     std::unique_ptr<DrmEncoder> enc(
    115         new DrmEncoder(e, current_crtc, possible_crtcs));
    116 
    117     drmModeFreeEncoder(e);
    118 
    119     encoders_.emplace_back(std::move(enc));
    120   }
    121 
    122   for (int i = 0; !ret && i < res->count_connectors; ++i) {
    123     drmModeConnectorPtr c = drmModeGetConnector(fd(), res->connectors[i]);
    124     if (!c) {
    125       ALOGE("Failed to get connector %d", res->connectors[i]);
    126       ret = -ENODEV;
    127       break;
    128     }
    129 
    130     std::vector<DrmEncoder *> possible_encoders;
    131     DrmEncoder *current_encoder = NULL;
    132     for (int j = 0; j < c->count_encoders; ++j) {
    133       for (auto &encoder : encoders_) {
    134         if (encoder->id() == c->encoders[j])
    135           possible_encoders.push_back(encoder.get());
    136         if (encoder->id() == c->encoder_id)
    137           current_encoder = encoder.get();
    138       }
    139     }
    140 
    141     std::unique_ptr<DrmConnector> conn(
    142         new DrmConnector(this, c, current_encoder, possible_encoders));
    143 
    144     drmModeFreeConnector(c);
    145 
    146     ret = conn->Init();
    147     if (ret) {
    148       ALOGE("Init connector %d failed", res->connectors[i]);
    149       break;
    150     }
    151 
    152     if (conn->built_in() && !found_primary) {
    153       conn->set_display(0);
    154       found_primary = true;
    155     } else {
    156       conn->set_display(display_num);
    157       ++display_num;
    158     }
    159 
    160     connectors_.emplace_back(std::move(conn));
    161   }
    162   if (res)
    163     drmModeFreeResources(res);
    164 
    165   // Catch-all for the above loops
    166   if (ret)
    167     return ret;
    168 
    169   drmModePlaneResPtr plane_res = drmModeGetPlaneResources(fd());
    170   if (!plane_res) {
    171     ALOGE("Failed to get plane resources");
    172     return -ENOENT;
    173   }
    174 
    175   for (uint32_t i = 0; i < plane_res->count_planes; ++i) {
    176     drmModePlanePtr p = drmModeGetPlane(fd(), plane_res->planes[i]);
    177     if (!p) {
    178       ALOGE("Failed to get plane %d", plane_res->planes[i]);
    179       ret = -ENODEV;
    180       break;
    181     }
    182 
    183     std::unique_ptr<DrmPlane> plane(new DrmPlane(this, p));
    184 
    185     drmModeFreePlane(p);
    186 
    187     ret = plane->Init();
    188     if (ret) {
    189       ALOGE("Init plane %d failed", plane_res->planes[i]);
    190       break;
    191     }
    192 
    193     planes_.emplace_back(std::move(plane));
    194   }
    195   drmModeFreePlaneResources(plane_res);
    196   if (ret)
    197     return ret;
    198 
    199   ret = compositor_.Init();
    200   if (ret)
    201     return ret;
    202 
    203   ret = event_listener_.Init();
    204   if (ret) {
    205     ALOGE("Can't initialize event listener %d", ret);
    206     return ret;
    207   }
    208 
    209   for (auto &conn : connectors_) {
    210     ret = CreateDisplayPipe(conn.get());
    211     if (ret) {
    212       ALOGE("Failed CreateDisplayPipe %d with %d", conn->id(), ret);
    213       return ret;
    214     }
    215   }
    216   return 0;
    217 }
    218 
    219 DrmConnector *DrmResources::GetConnectorForDisplay(int display) const {
    220   for (auto &conn : connectors_) {
    221     if (conn->display() == display)
    222       return conn.get();
    223   }
    224   return NULL;
    225 }
    226 
    227 DrmCrtc *DrmResources::GetCrtcForDisplay(int display) const {
    228   for (auto &crtc : crtcs_) {
    229     if (crtc->display() == display)
    230       return crtc.get();
    231   }
    232   return NULL;
    233 }
    234 
    235 DrmPlane *DrmResources::GetPlane(uint32_t id) const {
    236   for (auto &plane : planes_) {
    237     if (plane->id() == id)
    238       return plane.get();
    239   }
    240   return NULL;
    241 }
    242 
    243 uint32_t DrmResources::next_mode_id() {
    244   return ++mode_id_;
    245 }
    246 
    247 int DrmResources::TryEncoderForDisplay(int display, DrmEncoder *enc) {
    248   /* First try to use the currently-bound crtc */
    249   DrmCrtc *crtc = enc->crtc();
    250   if (crtc && crtc->can_bind(display)) {
    251     crtc->set_display(display);
    252     return 0;
    253   }
    254 
    255   /* Try to find a possible crtc which will work */
    256   for (DrmCrtc *crtc : enc->possible_crtcs()) {
    257     /* We've already tried this earlier */
    258     if (crtc == enc->crtc())
    259       continue;
    260 
    261     if (crtc->can_bind(display)) {
    262       enc->set_crtc(crtc);
    263       crtc->set_display(display);
    264       return 0;
    265     }
    266   }
    267 
    268   /* We can't use the encoder, but nothing went wrong, try another one */
    269   return -EAGAIN;
    270 }
    271 
    272 int DrmResources::CreateDisplayPipe(DrmConnector *connector) {
    273   int display = connector->display();
    274   /* Try to use current setup first */
    275   if (connector->encoder()) {
    276     int ret = TryEncoderForDisplay(display, connector->encoder());
    277     if (!ret) {
    278       return 0;
    279     } else if (ret != -EAGAIN) {
    280       ALOGE("Could not set mode %d/%d", display, ret);
    281       return ret;
    282     }
    283   }
    284 
    285   for (DrmEncoder *enc : connector->possible_encoders()) {
    286     int ret = TryEncoderForDisplay(display, enc);
    287     if (!ret) {
    288       connector->set_encoder(enc);
    289       return 0;
    290     } else if (ret != -EAGAIN) {
    291       ALOGE("Could not set mode %d/%d", display, ret);
    292       return ret;
    293     }
    294   }
    295   ALOGE("Could not find a suitable encoder/crtc for display %d",
    296         connector->display());
    297   return -ENODEV;
    298 }
    299 
    300 int DrmResources::CreatePropertyBlob(void *data, size_t length,
    301                                      uint32_t *blob_id) {
    302   struct drm_mode_create_blob create_blob;
    303   memset(&create_blob, 0, sizeof(create_blob));
    304   create_blob.length = length;
    305   create_blob.data = (__u64)data;
    306 
    307   int ret = drmIoctl(fd(), DRM_IOCTL_MODE_CREATEPROPBLOB, &create_blob);
    308   if (ret) {
    309     ALOGE("Failed to create mode property blob %d", ret);
    310     return ret;
    311   }
    312   *blob_id = create_blob.blob_id;
    313   return 0;
    314 }
    315 
    316 int DrmResources::DestroyPropertyBlob(uint32_t blob_id) {
    317   if (!blob_id)
    318     return 0;
    319 
    320   struct drm_mode_destroy_blob destroy_blob;
    321   memset(&destroy_blob, 0, sizeof(destroy_blob));
    322   destroy_blob.blob_id = (__u32)blob_id;
    323   int ret = drmIoctl(fd(), DRM_IOCTL_MODE_DESTROYPROPBLOB, &destroy_blob);
    324   if (ret) {
    325     ALOGE("Failed to destroy mode property blob %" PRIu32 "/%d", blob_id, ret);
    326     return ret;
    327   }
    328   return 0;
    329 }
    330 
    331 int DrmResources::SetDisplayActiveMode(int display, const DrmMode &mode) {
    332   std::unique_ptr<DrmComposition> comp(compositor_.CreateComposition(NULL));
    333   if (!comp) {
    334     ALOGE("Failed to create composition for dpms on %d", display);
    335     return -ENOMEM;
    336   }
    337   int ret = comp->SetDisplayMode(display, mode);
    338   if (ret) {
    339     ALOGE("Failed to add mode to composition on %d %d", display, ret);
    340     return ret;
    341   }
    342   ret = compositor_.QueueComposition(std::move(comp));
    343   if (ret) {
    344     ALOGE("Failed to queue dpms composition on %d %d", display, ret);
    345     return ret;
    346   }
    347   return 0;
    348 }
    349 
    350 int DrmResources::SetDpmsMode(int display, uint64_t mode) {
    351   if (mode != DRM_MODE_DPMS_ON && mode != DRM_MODE_DPMS_OFF) {
    352     ALOGE("Invalid dpms mode %" PRIu64, mode);
    353     return -EINVAL;
    354   }
    355 
    356   std::unique_ptr<DrmComposition> comp(compositor_.CreateComposition(NULL));
    357   if (!comp) {
    358     ALOGE("Failed to create composition for dpms on %d", display);
    359     return -ENOMEM;
    360   }
    361   int ret = comp->SetDpmsMode(display, mode);
    362   if (ret) {
    363     ALOGE("Failed to add dpms %" PRIu64 " to composition on %d %d", mode,
    364           display, ret);
    365     return ret;
    366   }
    367   ret = compositor_.QueueComposition(std::move(comp));
    368   if (ret) {
    369     ALOGE("Failed to queue dpms composition on %d %d", display, ret);
    370     return ret;
    371   }
    372   return 0;
    373 }
    374 
    375 DrmCompositor *DrmResources::compositor() {
    376   return &compositor_;
    377 }
    378 
    379 DrmEventListener *DrmResources::event_listener() {
    380   return &event_listener_;
    381 }
    382 
    383 int DrmResources::GetProperty(uint32_t obj_id, uint32_t obj_type,
    384                               const char *prop_name, DrmProperty *property) {
    385   drmModeObjectPropertiesPtr props;
    386 
    387   props = drmModeObjectGetProperties(fd(), obj_id, obj_type);
    388   if (!props) {
    389     ALOGE("Failed to get properties for %d/%x", obj_id, obj_type);
    390     return -ENODEV;
    391   }
    392 
    393   bool found = false;
    394   for (int i = 0; !found && (size_t)i < props->count_props; ++i) {
    395     drmModePropertyPtr p = drmModeGetProperty(fd(), props->props[i]);
    396     if (!strcmp(p->name, prop_name)) {
    397       property->Init(p, props->prop_values[i]);
    398       found = true;
    399     }
    400     drmModeFreeProperty(p);
    401   }
    402 
    403   drmModeFreeObjectProperties(props);
    404   return found ? 0 : -ENOENT;
    405 }
    406 
    407 int DrmResources::GetPlaneProperty(const DrmPlane &plane, const char *prop_name,
    408                                    DrmProperty *property) {
    409   return GetProperty(plane.id(), DRM_MODE_OBJECT_PLANE, prop_name, property);
    410 }
    411 
    412 int DrmResources::GetCrtcProperty(const DrmCrtc &crtc, const char *prop_name,
    413                                   DrmProperty *property) {
    414   return GetProperty(crtc.id(), DRM_MODE_OBJECT_CRTC, prop_name, property);
    415 }
    416 
    417 int DrmResources::GetConnectorProperty(const DrmConnector &connector,
    418                                        const char *prop_name,
    419                                        DrmProperty *property) {
    420   return GetProperty(connector.id(), DRM_MODE_OBJECT_CONNECTOR, prop_name,
    421                      property);
    422 }
    423 }
    424