2 * Copyright 2017 The Chromium OS Authors. All rights reserved.
3 * Use of this source code is governed by a BSD-style license that can be
4 * found in the LICENSE file.
7 #include "cros_gralloc_buffer.h"
12 cros_gralloc_buffer::cros_gralloc_buffer(uint32_t id, struct bo *acquirebo_,
13 struct cros_gralloc_handle *acquire_handle)
14 : id_(id), bo_(acquirebo_), hnd_(acquire_handle), refcount_(1), lockcount_(0)
17 num_planes_ = drv_bo_get_num_planes(bo_);
18 for (uint32_t plane = 0; plane < num_planes_; plane++)
19 lock_data_[plane] = nullptr;
22 cros_gralloc_buffer::~cros_gralloc_buffer()
26 native_handle_close(&hnd_->base);
31 uint32_t cros_gralloc_buffer::get_id() const
36 int32_t cros_gralloc_buffer::increase_refcount()
41 int32_t cros_gralloc_buffer::decrease_refcount()
43 assert(refcount_ > 0);
47 int32_t cros_gralloc_buffer::lock(uint64_t flags, uint8_t *addr[DRV_MAX_PLANES])
50 * Gralloc consumers don't support more than one kernel buffer per buffer object yet, so
51 * just use the first kernel buffer.
53 if (drv_num_buffers_per_bo(bo_) != 1) {
54 cros_gralloc_error("Can only support one buffer per bo.");
61 vaddr = lock_data_[0]->addr;
63 vaddr = drv_bo_map(bo_, 0, 0, drv_bo_get_width(bo_), drv_bo_get_height(bo_),
64 BO_TRANSFER_READ_WRITE, &lock_data_[0], 0);
67 if (vaddr == MAP_FAILED) {
68 cros_gralloc_error("Mapping failed.");
72 addr[0] = static_cast<uint8_t *>(vaddr);
75 for (uint32_t plane = 0; plane < num_planes_; plane++)
76 addr[plane] = addr[0] + drv_bo_get_plane_offset(bo_, plane);
82 int32_t cros_gralloc_buffer::unlock()
84 if (lockcount_ <= 0) {
85 cros_gralloc_error("Buffer was not locked.");
91 drv_bo_unmap(bo_, lock_data_[0]);
92 lock_data_[0] = nullptr;