1c275a02c8
For virtual machines with Cirrus device the drmModeAddFB fails. So far there was no error message at all, we only saw it failed. With this change the drmModeAddFB is checked for error and a warning is shown. Also further debug messages are added for other cases where things can fail. Reviewed-By: Eike Hein
142 lines
4 KiB
C++
142 lines
4 KiB
C++
/********************************************************************
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KWin - the KDE window manager
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This file is part of the KDE project.
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Copyright (C) 2015 Martin Gräßlin <mgraesslin@kde.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************/
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#include "drm_buffer.h"
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#include "drm_backend.h"
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#include "logging.h"
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// system
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#include <sys/mman.h>
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#include <errno.h>
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// drm
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#include <xf86drm.h>
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#if HAVE_GBM
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#include <gbm.h>
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#endif
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namespace KWin
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{
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DrmBuffer::DrmBuffer(DrmBackend *backend, const QSize &size)
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: m_backend(backend)
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, m_size(size)
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{
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drm_mode_create_dumb createArgs;
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memset(&createArgs, 0, sizeof createArgs);
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createArgs.bpp = 32;
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createArgs.width = size.width();
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createArgs.height = size.height();
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if (drmIoctl(m_backend->fd(), DRM_IOCTL_MODE_CREATE_DUMB, &createArgs) != 0) {
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qCWarning(KWIN_DRM) << "DRM_IOCTL_MODE_CREATE_DUMB failed";
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return;
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}
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m_handle = createArgs.handle;
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m_bufferSize = createArgs.size;
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m_stride = createArgs.pitch;
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if (drmModeAddFB(m_backend->fd(), size.width(), size.height(), 24, 32,
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m_stride, createArgs.handle, &m_bufferId) != 0) {
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qCWarning(KWIN_DRM) << "drmModeAddFB failed with errno" << errno;
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}
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}
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#if HAVE_GBM
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static void gbmCallback(gbm_bo *bo, void *data)
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{
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DrmBackend *backend = reinterpret_cast<DrmBackend*>(data);
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const auto &buffers = backend->buffers();
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for (auto buffer: buffers) {
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if (buffer->gbm() == bo) {
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delete buffer;
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return;
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}
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}
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}
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#endif
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DrmBuffer::DrmBuffer(DrmBackend *backend, gbm_surface *surface)
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: m_backend(backend)
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, m_surface(surface)
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{
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#if HAVE_GBM
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m_bo = gbm_surface_lock_front_buffer(surface);
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if (!m_bo) {
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qCWarning(KWIN_DRM) << "Locking front buffer failed";
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return;
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}
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m_size = QSize(gbm_bo_get_width(m_bo), gbm_bo_get_height(m_bo));
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m_stride = gbm_bo_get_stride(m_bo);
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if (drmModeAddFB(m_backend->fd(), m_size.width(), m_size.height(), 24, 32, m_stride, gbm_bo_get_handle(m_bo).u32, &m_bufferId) != 0) {
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qCWarning(KWIN_DRM) << "drmModeAddFB failed";
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}
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gbm_bo_set_user_data(m_bo, m_backend, gbmCallback);
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#endif
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}
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DrmBuffer::~DrmBuffer()
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{
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m_backend->bufferDestroyed(this);
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delete m_image;
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if (m_memory) {
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munmap(m_memory, m_bufferSize);
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}
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if (m_bufferId) {
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drmModeRmFB(m_backend->fd(), m_bufferId);
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}
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if (m_handle) {
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drm_mode_destroy_dumb destroyArgs;
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destroyArgs.handle = m_handle;
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drmIoctl(m_backend->fd(), DRM_IOCTL_MODE_DESTROY_DUMB, &destroyArgs);
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}
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releaseGbm();
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}
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bool DrmBuffer::map(QImage::Format format)
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{
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if (!m_handle || !m_bufferId) {
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return false;
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}
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drm_mode_map_dumb mapArgs;
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memset(&mapArgs, 0, sizeof mapArgs);
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mapArgs.handle = m_handle;
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if (drmIoctl(m_backend->fd(), DRM_IOCTL_MODE_MAP_DUMB, &mapArgs) != 0) {
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return false;
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}
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void *address = mmap(nullptr, m_bufferSize, PROT_WRITE, MAP_SHARED, m_backend->fd(), mapArgs.offset);
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if (address == MAP_FAILED) {
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return false;
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}
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m_memory = address;
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m_image = new QImage((uchar*)m_memory, m_size.width(), m_size.height(), m_stride, format);
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return !m_image->isNull();
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}
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void DrmBuffer::releaseGbm()
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{
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#if HAVE_GBM
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if (m_bo) {
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gbm_surface_release_buffer(m_surface, m_bo);
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m_bo = nullptr;
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}
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#endif
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}
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}
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