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/*
* Copyright (c) 2017 - 2018, The Linux Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of The Linux Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <errno.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <unistd.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
// Intentionally included after xf86 headers so that they in-turn include libdrm version of drm.h
// that doesn't use keyword "virtual" for a variable name. Not doing so leads to the kernel version
// of drm.h being included causing compilation to fail
#include <drm/msm_drm.h>
#include <algorithm>
#include <iterator>
#include "drm_master.h"
#define __CLASS__ "DRMMaster"
using std::mutex;
using std::lock_guard;
using std::begin;
using std::copy;
using std::end;
using std::fill;
namespace drm_utils {
DRMMaster *DRMMaster::s_instance = nullptr;
mutex DRMMaster::s_lock;
int DRMMaster::GetInstance(DRMMaster **master) {
lock_guard<mutex> obj(s_lock);
if (!s_instance) {
s_instance = new DRMMaster();
if (s_instance->Init() < 0) {
delete s_instance;
s_instance = nullptr;
return -ENODEV;
}
}
*master = s_instance;
return 0;
}
void DRMMaster::DestroyInstance() {
lock_guard<mutex> obj(s_lock);
delete s_instance;
s_instance = nullptr;
}
int DRMMaster::Init() {
dev_fd_ = drmOpen("msm_drm", nullptr);
if (dev_fd_ < 0) {
DRM_LOGE("drmOpen failed with error %d", dev_fd_);
return -ENODEV;
}
return 0;
}
DRMMaster::~DRMMaster() {
drmClose(dev_fd_);
dev_fd_ = -1;
}
int DRMMaster::CreateFbId(const DRMBuffer &drm_buffer, uint32_t *fb_id) {
uint32_t gem_handle = 0;
int ret = drmPrimeFDToHandle(dev_fd_, drm_buffer.fd, &gem_handle);
if (ret) {
DRM_LOGE("drmPrimeFDToHandle failed with error %d", ret);
return ret;
}
struct drm_mode_fb_cmd2 cmd2 {};
cmd2.width = drm_buffer.width;
cmd2.height = drm_buffer.height;
cmd2.pixel_format = drm_buffer.drm_format;
cmd2.flags = DRM_MODE_FB_MODIFIERS;
fill(begin(cmd2.handles), begin(cmd2.handles) + drm_buffer.num_planes, gem_handle);
copy(begin(drm_buffer.stride), end(drm_buffer.stride), begin(cmd2.pitches));
copy(begin(drm_buffer.offset), end(drm_buffer.offset), begin(cmd2.offsets));
fill(begin(cmd2.modifier), begin(cmd2.modifier) + drm_buffer.num_planes,
drm_buffer.drm_format_modifier);
if ((ret = drmIoctl(dev_fd_, DRM_IOCTL_MODE_ADDFB2, &cmd2))) {
DRM_LOGE("DRM_IOCTL_MODE_ADDFB2 failed with error %d", ret);
} else {
*fb_id = cmd2.fb_id;
}
struct drm_gem_close gem_close = {};
gem_close.handle = gem_handle;
int ret1 = drmIoctl(dev_fd_, DRM_IOCTL_GEM_CLOSE, &gem_close);
if (ret1) {
DRM_LOGE("drmIoctl::DRM_IOCTL_GEM_CLOSE failed with error %d", ret1);
return ret1;
}
return ret;
}
int DRMMaster::RemoveFbId(uint32_t fb_id) {
int ret = 0;
#ifdef DRM_IOCTL_MSM_RMFB2
ret = drmIoctl(dev_fd_, DRM_IOCTL_MSM_RMFB2, &fb_id);
if (ret) {
DRM_LOGE("drmIoctl::DRM_IOCTL_MSM_RMFB2 failed for fb_id %d with error %d", fb_id, errno);
}
#else
ret = drmModeRmFB(dev_fd_, fb_id);
if (ret) {
DRM_LOGE("drmModeRmFB failed for fb_id %d with error %d", fb_id, ret);
}
#endif
return ret;
}
bool DRMMaster::IsRmFbRefCounted() {
#ifdef DRM_IOCTL_MSM_RMFB2
return true;
#endif
return false;
}
} // namespace drm_utils