e6421dc5da
This changes the way the KMS backends load; if we're headless, we always use the dummy one and fail otherwise; in other cases, we first try the atomic backend, and if that fails, fall back on the simple one. The aim for this is to have the impl device open and close the device when needed, using the device pool directly. Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1828>
127 lines
4.2 KiB
C
127 lines
4.2 KiB
C
/*
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* Copyright (C) 2021 Red Hat
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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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, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*/
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#include "config.h"
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#include "backends/native/meta-kms-impl-device-dummy.h"
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#include "backends/native/meta-backend-native-private.h"
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#include "backends/native/meta-kms.h"
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struct _MetaKmsImplDeviceDummy
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{
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MetaKmsImplDevice parent;
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};
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static GInitableIface *initable_parent_iface;
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static void
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initable_iface_init (GInitableIface *iface);
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G_DEFINE_TYPE_WITH_CODE (MetaKmsImplDeviceDummy,
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meta_kms_impl_device_dummy,
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META_TYPE_KMS_IMPL_DEVICE,
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G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE,
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initable_iface_init))
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static void
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meta_kms_impl_device_dummy_discard_pending_page_flips (MetaKmsImplDevice *impl_device)
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{
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}
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static MetaDeviceFile *
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meta_kms_impl_device_dummy_open_device_file (MetaKmsImplDevice *impl_device,
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const char *path,
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GError **error)
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{
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MetaKmsDevice *device = meta_kms_impl_device_get_device (impl_device);
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MetaKms *kms = meta_kms_device_get_kms (device);
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MetaBackend *backend = meta_kms_get_backend (kms);
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MetaDevicePool *device_pool =
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meta_backend_native_get_device_pool (META_BACKEND_NATIVE (backend));
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g_autoptr (MetaDeviceFile) device_file = NULL;
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int fd;
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g_autofree char *render_node_path = NULL;
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device_file = meta_device_pool_open (device_pool, path,
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META_DEVICE_FILE_FLAG_NONE,
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error);
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if (!device_file)
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return NULL;
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fd = meta_device_file_get_fd (device_file);
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render_node_path = drmGetRenderDeviceNameFromFd (fd);
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if (!render_node_path)
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{
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g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
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"Couldn't find render node device for '%s' (%s)",
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meta_kms_impl_device_get_path (impl_device),
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meta_kms_impl_device_get_driver_name (impl_device));
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return NULL;
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}
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meta_topic (META_DEBUG_KMS, "Found render node '%s' from '%s'",
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render_node_path, path);
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return meta_device_pool_open (device_pool, render_node_path,
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META_DEVICE_FILE_FLAG_NONE,
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error);
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}
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static gboolean
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meta_kms_impl_device_dummy_initable_init (GInitable *initable,
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GCancellable *cancellable,
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GError **error)
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{
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MetaKmsImplDevice *impl_device = META_KMS_IMPL_DEVICE (initable);
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if (!initable_parent_iface->init (initable, cancellable, error))
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return FALSE;
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g_message ("Added device '%s' (%s) using no mode setting.",
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meta_kms_impl_device_get_path (impl_device),
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meta_kms_impl_device_get_driver_name (impl_device));
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return TRUE;
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}
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static void
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initable_iface_init (GInitableIface *iface)
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{
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initable_parent_iface = g_type_interface_peek_parent (iface);
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iface->init = meta_kms_impl_device_dummy_initable_init;
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}
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static void
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meta_kms_impl_device_dummy_init (MetaKmsImplDeviceDummy *impl_device_dummy)
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{
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}
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static void
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meta_kms_impl_device_dummy_class_init (MetaKmsImplDeviceDummyClass *klass)
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{
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MetaKmsImplDeviceClass *impl_device_class =
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META_KMS_IMPL_DEVICE_CLASS (klass);
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impl_device_class->open_device_file =
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meta_kms_impl_device_dummy_open_device_file;
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impl_device_class->discard_pending_page_flips =
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meta_kms_impl_device_dummy_discard_pending_page_flips;
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}
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