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/*
KWin - the KDE window manager
This file is part of the KDE project .
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SPDX - FileCopyrightText : 2017 Roman Gilg < subdiff @ gmail . com >
SPDX - FileCopyrightText : 2015 Martin Gräßlin < mgraesslin @ kde . org >
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SPDX - License - Identifier : GPL - 2.0 - or - later
*/
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# include "drm_buffer_gbm.h"
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# include "gbm_surface.h"
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# include "logging.h"
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# include "drm_gpu.h"
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// system
# include <sys/mman.h>
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// c++
# include <cerrno>
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// drm
# include <xf86drm.h>
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# include <xf86drmMode.h>
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# include <gbm.h>
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// KWaylandServer
# include "KWaylandServer/buffer_interface.h"
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# include <drm_fourcc.h>
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namespace KWin
{
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GbmBuffer : : GbmBuffer ( const QSharedPointer < GbmSurface > & surface )
: m_surface ( surface )
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{
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m_bo = m_surface - > lockFrontBuffer ( ) ;
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if ( m_bo ) {
m_stride = gbm_bo_get_stride ( m_bo ) ;
} else {
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qCCritical ( KWIN_DRM ) < < " failed to lock front buffer! " < < strerror ( errno ) ;
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}
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}
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GbmBuffer : : GbmBuffer ( gbm_bo * buffer , KWaylandServer : : BufferInterface * bufferInterface )
: m_bo ( buffer )
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, m_bufferInterface ( bufferInterface )
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, m_stride ( gbm_bo_get_stride ( m_bo ) )
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{
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if ( m_bufferInterface ) {
m_bufferInterface - > ref ( ) ;
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connect ( m_bufferInterface , & KWaylandServer : : BufferInterface : : aboutToBeDestroyed , this , & GbmBuffer : : clearBufferInterface ) ;
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}
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}
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GbmBuffer : : ~ GbmBuffer ( )
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{
releaseBuffer ( ) ;
}
void GbmBuffer : : releaseBuffer ( )
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{
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if ( m_bufferInterface ) {
clearBufferInterface ( ) ;
}
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if ( ! m_bo ) {
return ;
}
if ( m_mapping ) {
gbm_bo_unmap ( m_bo , m_mapping ) ;
}
if ( m_surface ) {
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m_surface - > releaseBuffer ( m_bo ) ;
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} else {
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gbm_bo_destroy ( m_bo ) ;
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}
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m_bo = nullptr ;
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}
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bool GbmBuffer : : map ( uint32_t flags )
{
if ( m_data ) {
return true ;
}
if ( ! m_bo ) {
return false ;
}
m_data = gbm_bo_map ( m_bo , 0 , 0 , gbm_bo_get_width ( m_bo ) , gbm_bo_get_height ( m_bo ) , flags , & m_stride , & m_mapping ) ;
return m_data ;
}
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void GbmBuffer : : clearBufferInterface ( )
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{
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disconnect ( m_bufferInterface , & KWaylandServer : : BufferInterface : : aboutToBeDestroyed , this , & DrmGbmBuffer : : clearBufferInterface ) ;
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m_bufferInterface - > unref ( ) ;
m_bufferInterface = nullptr ;
}
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DrmGbmBuffer : : DrmGbmBuffer ( DrmGpu * gpu , const QSharedPointer < GbmSurface > & surface )
: DrmBuffer ( gpu ) , GbmBuffer ( surface )
{
if ( ! m_bo ) {
return ;
}
initialize ( ) ;
}
DrmGbmBuffer : : DrmGbmBuffer ( DrmGpu * gpu , gbm_bo * buffer , KWaylandServer : : BufferInterface * bufferInterface )
: DrmBuffer ( gpu ) , GbmBuffer ( buffer , bufferInterface )
{
initialize ( ) ;
}
DrmGbmBuffer : : ~ DrmGbmBuffer ( )
{
if ( m_bufferId ) {
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if ( drmModeRmFB ( m_gpu - > fd ( ) , m_bufferId ) ! = 0 ) {
qCCritical ( KWIN_DRM ) < < " drmModeRmFB on GPU " < < m_gpu - > devNode ( ) < < " failed! " < < strerror ( errno ) ;
}
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}
}
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void DrmGbmBuffer : : releaseGbm ( )
{
releaseBuffer ( ) ;
}
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void DrmGbmBuffer : : initialize ( )
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{
m_size = QSize ( gbm_bo_get_width ( m_bo ) , gbm_bo_get_height ( m_bo ) ) ;
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uint32_t format = gbm_bo_get_format ( m_bo ) ;
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uint32_t handles [ 4 ] = { } ;
uint32_t strides [ 4 ] = { } ;
uint32_t offsets [ 4 ] = { } ;
uint64_t modifiers [ 4 ] = { } ;
if ( gbm_bo_get_handle_for_plane ( m_bo , 0 ) . s32 ! = - 1 ) {
for ( int i = 0 ; i < gbm_bo_get_plane_count ( m_bo ) ; i + + ) {
handles [ i ] = gbm_bo_get_handle_for_plane ( m_bo , i ) . u32 ;
strides [ i ] = gbm_bo_get_stride_for_plane ( m_bo , i ) ;
offsets [ i ] = gbm_bo_get_offset ( m_bo , i ) ;
modifiers [ i ] = gbm_bo_get_modifier ( m_bo ) ;
}
} else {
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handles [ 0 ] = gbm_bo_get_handle ( m_bo ) . u32 ;
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strides [ 0 ] = gbm_bo_get_stride ( m_bo ) ;
modifiers [ 0 ] = DRM_FORMAT_MOD_INVALID ;
}
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if ( modifiers [ 0 ] ! = DRM_FORMAT_MOD_INVALID & & m_gpu - > addFB2ModifiersSupported ( ) ) {
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if ( drmModeAddFB2WithModifiers ( m_gpu - > fd ( ) , m_size . width ( ) , m_size . height ( ) , format , handles , strides , offsets , modifiers , & m_bufferId , DRM_MODE_FB_MODIFIERS ) ) {
gbm_format_name_desc name ;
gbm_format_get_name ( format , & name ) ;
qCCritical ( KWIN_DRM ) < < " drmModeAddFB2WithModifiers on GPU " < < m_gpu - > devNode ( ) < < " failed for a buffer with format " < < name . name < < " and modifier " < < modifiers [ 0 ] < < strerror ( errno ) ;
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}
} else {
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if ( drmModeAddFB2 ( m_gpu - > fd ( ) , m_size . width ( ) , m_size . height ( ) , format , handles , strides , offsets , & m_bufferId , 0 ) ) {
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// fallback
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if ( drmModeAddFB ( m_gpu - > fd ( ) , m_size . width ( ) , m_size . height ( ) , 24 , 32 , strides [ 0 ] , handles [ 0 ] , & m_bufferId ) ! = 0 ) {
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gbm_format_name_desc name ;
gbm_format_get_name ( format , & name ) ;
qCCritical ( KWIN_DRM ) < < " drmModeAddFB2 and drmModeAddFB both failed on GPU " < < m_gpu - > devNode ( ) < < " for a buffer with format " < < name . name < < " and modifier " < < modifiers [ 0 ] < < strerror ( errno ) ;
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}
}
}
gbm_bo_set_user_data ( m_bo , this , nullptr ) ;
}
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}