drm_hwcomposer: Wrap libdrm ops (minus modeset/flip) in C++ classes
This allows us to compartmentalize a bunch of code/logic from
hwcomposer.cpp into drm classes.
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Change-Id: Id3f912126f1fdcd44d32c3eb4fba646f77590278
diff --git a/drmresources.cpp b/drmresources.cpp
new file mode 100644
index 0000000..3da0f04
--- /dev/null
+++ b/drmresources.cpp
@@ -0,0 +1,421 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "hwc-drm-resources"
+
+#include "drmconnector.h"
+#include "drmcrtc.h"
+#include "drmencoder.h"
+#include "drmplane.h"
+#include "drmresources.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdint.h>
+#include <xf86drm.h>
+#include <xf86drmMode.h>
+
+#include <cutils/log.h>
+#include <cutils/properties.h>
+
+namespace android {
+
+DrmResources::DrmResources() : fd_(-1), mode_id_(0) {
+}
+
+DrmResources::~DrmResources() {
+ for (std::vector<DrmConnector *>::const_iterator iter = connectors_.begin();
+ iter != connectors_.end(); ++iter)
+ delete *iter;
+ connectors_.clear();
+
+ for (std::vector<DrmEncoder *>::const_iterator iter = encoders_.begin();
+ iter != encoders_.end(); ++iter)
+ delete *iter;
+ encoders_.clear();
+
+ for (std::vector<DrmCrtc *>::const_iterator iter = crtcs_.begin();
+ iter != crtcs_.end(); ++iter)
+ delete *iter;
+ crtcs_.clear();
+
+ for (std::vector<DrmPlane *>::const_iterator iter = planes_.begin();
+ iter != planes_.end(); ++iter)
+ delete *iter;
+ planes_.clear();
+
+ if (fd_ >= 0)
+ close(fd_);
+}
+
+int DrmResources::Init() {
+ char path[PROPERTY_VALUE_MAX];
+ property_get("hwc.drm.device", path, "/dev/dri/card0");
+
+ /* TODO: Use drmOpenControl here instead */
+ fd_ = open(path, O_RDWR);
+ if (fd_ < 0) {
+ ALOGE("Failed to open dri- %s", strerror(-errno));
+ return -ENODEV;
+ }
+
+ int ret = drmSetClientCap(fd_, DRM_CLIENT_CAP_UNIVERSAL_PLANES, 1);
+ if (ret) {
+ ALOGE("Failed to set universal plane cap %d", ret);
+ return ret;
+ }
+
+ ret = drmSetClientCap(fd_, DRM_CLIENT_CAP_ATOMIC, 1);
+ if (ret) {
+ ALOGE("Failed to set atomic cap %d", ret);
+ return ret;
+ }
+
+ drmModeResPtr res = drmModeGetResources(fd_);
+ if (!res) {
+ ALOGE("Failed to get DrmResources resources");
+ return -ENODEV;
+ }
+
+ bool found_primary = false;
+ int display_num = 1;
+
+ for (int i = 0; !ret && i < res->count_crtcs; ++i) {
+ drmModeCrtcPtr c = drmModeGetCrtc(fd_, res->crtcs[i]);
+ if (!c) {
+ ALOGE("Failed to get crtc %d", res->crtcs[i]);
+ ret = -ENODEV;
+ break;
+ }
+
+ DrmCrtc *crtc = new DrmCrtc(c, i);
+
+ drmModeFreeCrtc(c);
+
+ if (!crtc) {
+ ALOGE("Failed to allocate crtc %d", res->crtcs[i]);
+ ret = -ENOMEM;
+ break;
+ }
+ crtcs_.push_back(crtc);
+ }
+
+ for (int i = 0; !ret && i < res->count_encoders; ++i) {
+ drmModeEncoderPtr e = drmModeGetEncoder(fd_, res->encoders[i]);
+ if (!e) {
+ ALOGE("Failed to get encoder %d", res->encoders[i]);
+ ret = -ENODEV;
+ break;
+ }
+
+ std::vector<DrmCrtc *> possible_crtcs;
+ DrmCrtc *current_crtc = NULL;
+ for (std::vector<DrmCrtc *>::const_iterator iter = crtcs_.begin();
+ iter != crtcs_.end(); ++iter) {
+ if ((1 << (*iter)->pipe()) & e->possible_crtcs)
+ possible_crtcs.push_back(*iter);
+
+ if ((*iter)->id() == e->crtc_id)
+ current_crtc = (*iter);
+ }
+
+ DrmEncoder *enc = new DrmEncoder(e, current_crtc, possible_crtcs);
+
+ drmModeFreeEncoder(e);
+
+ if (!enc) {
+ ALOGE("Failed to allocate enc %d", res->encoders[i]);
+ ret = -ENOMEM;
+ break;
+ }
+ encoders_.push_back(enc);
+ }
+
+ for (int i = 0; !ret && i < res->count_connectors; ++i) {
+ drmModeConnectorPtr c = drmModeGetConnector(fd_, res->connectors[i]);
+ if (!c) {
+ ALOGE("Failed to get connector %d", res->connectors[i]);
+ ret = -ENODEV;
+ break;
+ }
+
+ std::vector<DrmEncoder *> possible_encoders;
+ DrmEncoder *current_encoder = NULL;
+ for (int j = 0; j < c->count_encoders; ++j) {
+ for (std::vector<DrmEncoder *>::const_iterator iter = encoders_.begin();
+ iter != encoders_.end(); ++iter) {
+ if ((*iter)->id() == c->encoders[j])
+ possible_encoders.push_back((*iter));
+ if ((*iter)->id() == c->encoder_id)
+ current_encoder = *iter;
+ }
+ }
+
+ DrmConnector *conn =
+ new DrmConnector(this, c, current_encoder, possible_encoders);
+
+ drmModeFreeConnector(c);
+
+ if (!conn) {
+ ALOGE("Failed to allocate conn %d", res->connectors[i]);
+ ret = -ENOMEM;
+ break;
+ }
+
+ ret = conn->Init();
+ if (ret) {
+ ALOGE("Init connector %d failed", res->connectors[i]);
+ delete conn;
+ break;
+ }
+ connectors_.push_back(conn);
+
+ if (conn->built_in() && !found_primary) {
+ conn->set_display(0);
+ found_primary = true;
+ } else {
+ conn->set_display(display_num);
+ ++display_num;
+ }
+ }
+ if (res)
+ drmModeFreeResources(res);
+
+ // Catch-all for the above loops
+ if (ret)
+ return ret;
+
+ drmModePlaneResPtr plane_res = drmModeGetPlaneResources(fd_);
+ if (!plane_res) {
+ ALOGE("Failed to get plane resources");
+ return -ENOENT;
+ }
+
+ for (uint32_t i = 0; i < plane_res->count_planes; ++i) {
+ drmModePlanePtr p = drmModeGetPlane(fd_, plane_res->planes[i]);
+ if (!p) {
+ ALOGE("Failed to get plane %d", plane_res->planes[i]);
+ ret = -ENODEV;
+ break;
+ }
+
+ DrmPlane *plane = new DrmPlane(this, p);
+
+ drmModeFreePlane(p);
+
+ if (!plane) {
+ ALOGE("Allocate plane %d failed", plane_res->planes[i]);
+ ret = -ENOMEM;
+ break;
+ }
+
+ ret = plane->Init();
+ if (ret) {
+ ALOGE("Init plane %d failed", plane_res->planes[i]);
+ delete plane;
+ break;
+ }
+
+ planes_.push_back(plane);
+ }
+ drmModeFreePlaneResources(plane_res);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+int DrmResources::fd() const {
+ return fd_;
+}
+
+DrmResources::ConnectorIter DrmResources::begin_connectors() const {
+ return connectors_.begin();
+}
+
+DrmResources::ConnectorIter DrmResources::end_connectors() const {
+ return connectors_.end();
+}
+
+DrmConnector *DrmResources::GetConnectorForDisplay(int display) const {
+ for (ConnectorIter iter = connectors_.begin(); iter != connectors_.end();
+ ++iter) {
+ if ((*iter)->display() == display)
+ return *iter;
+ }
+ return NULL;
+}
+
+DrmCrtc *DrmResources::GetCrtcForDisplay(int display) const {
+ for (std::vector<DrmCrtc *>::const_iterator iter = crtcs_.begin();
+ iter != crtcs_.end(); ++iter) {
+ if ((*iter)->display() == display)
+ return *iter;
+ }
+ return NULL;
+}
+
+DrmResources::PlaneIter DrmResources::begin_planes() const {
+ return planes_.begin();
+}
+
+DrmResources::PlaneIter DrmResources::end_planes() const {
+ return planes_.end();
+}
+
+DrmPlane *DrmResources::GetPlane(uint32_t id) const {
+ for (std::vector<DrmPlane *>::const_iterator iter = planes_.begin();
+ iter != planes_.end(); ++iter) {
+ if ((*iter)->id() == id)
+ return *iter;
+ }
+ return NULL;
+}
+
+uint32_t DrmResources::next_mode_id() {
+ return ++mode_id_;
+}
+
+int DrmResources::TryEncoderForDisplay(int display, DrmEncoder *enc) {
+ /* First try to use the currently-bound crtc */
+ DrmCrtc *crtc = enc->crtc();
+ if (crtc && crtc->can_bind(display)) {
+ crtc->set_display(display);
+ return 0;
+ }
+
+ /* Try to find a possible crtc which will work */
+ for (DrmEncoder::CrtcIter iter = enc->begin_possible_crtcs();
+ iter != enc->end_possible_crtcs(); ++iter) {
+ /* We've already tried this earlier */
+ if (*iter == enc->crtc())
+ continue;
+
+ if ((*iter)->can_bind(display)) {
+ enc->set_crtc(*iter);
+ (*iter)->set_display(display);
+ return 0;
+ }
+ }
+
+ /* We can't use the encoder, but nothing went wrong, try another one */
+ return -EAGAIN;
+}
+
+int DrmResources::SetDisplayActiveMode(int display, uint32_t mode_id) {
+ DrmEncoder *enc;
+ int ret;
+
+ DrmConnector *con = GetConnectorForDisplay(display);
+ if (!con) {
+ ALOGE("Could not locate connector for display %d", display);
+ return -ENODEV;
+ }
+
+ /* Try to use current setup first */
+ enc = con->encoder();
+ if (enc) {
+ ret = TryEncoderForDisplay(display, enc);
+ if (!ret) {
+ con->set_encoder(enc);
+ return con->set_active_mode(mode_id);
+ } else if (ret != -EAGAIN) {
+ ALOGE("Could not set mode %d/%d", display, ret);
+ return ret;
+ }
+ }
+
+ for (DrmConnector::EncoderIter iter = con->begin_possible_encoders();
+ iter != con->end_possible_encoders(); ++iter) {
+ ret = TryEncoderForDisplay(display, *iter);
+ if (!ret) {
+ con->set_encoder(*iter);
+ return con->set_active_mode(mode_id);
+ } else if (ret != -EAGAIN) {
+ ALOGE("Could not set mode %d/%d", display, ret);
+ return ret;
+ }
+ }
+
+ ALOGE("Could not find a suitable encoder/crtc for display %d", display);
+ return -EINVAL;
+}
+
+int DrmResources::SetDpmsMode(int display, uint64_t mode) {
+ if (mode != DRM_MODE_DPMS_ON && mode != DRM_MODE_DPMS_OFF) {
+ ALOGE("Invalid dpms mode %d", mode);
+ return -EINVAL;
+ }
+
+ DrmCrtc *crtc = GetCrtcForDisplay(display);
+ if (!crtc) {
+ ALOGE("Failed to get DrmCrtc for display %d", display);
+ return -ENODEV;
+ }
+ crtc->set_requires_modeset(true);
+
+ DrmConnector *c = GetConnectorForDisplay(display);
+ if (!c) {
+ ALOGE("Failed to get DrmConnector for display %d", display);
+ return -ENODEV;
+ }
+
+ const DrmProperty &prop = c->dpms_property();
+ int ret = drmModeConnectorSetProperty(fd_, c->id(), prop.id(), mode);
+ if (ret) {
+ ALOGE("Failed to set DPMS property for connector %d", c->id());
+ return ret;
+ }
+
+ return 0;
+}
+
+int DrmResources::GetProperty(uint32_t obj_id, uint32_t obj_type,
+ const char *prop_name, DrmProperty *property) {
+ drmModeObjectPropertiesPtr props;
+
+ props = drmModeObjectGetProperties(fd_, obj_id, obj_type);
+ if (!props) {
+ ALOGE("Failed to get properties for %d/%x", obj_id, obj_type);
+ return -ENODEV;
+ }
+
+ bool found = false;
+ for (int i = 0; !found && (size_t)i < props->count_props; ++i) {
+ drmModePropertyPtr p = drmModeGetProperty(fd_, props->props[i]);
+ if (!strcmp(p->name, prop_name)) {
+ property->Init(p, props->prop_values[i]);
+ found = true;
+ }
+ drmModeFreeProperty(p);
+ }
+
+ drmModeFreeObjectProperties(props);
+ return found ? 0 : -ENOENT;
+}
+
+int DrmResources::GetPlaneProperty(const DrmPlane &plane, const char *prop_name,
+ DrmProperty *property) {
+ return GetProperty(plane.id(), DRM_MODE_OBJECT_PLANE, prop_name, property);
+}
+
+int DrmResources::GetConnectorProperty(const DrmConnector &connector,
+ const char *prop_name,
+ DrmProperty *property) {
+ return GetProperty(connector.id(), DRM_MODE_OBJECT_CONNECTOR, prop_name,
+ property);
+}
+}