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gpu-kms: Check for DRM resources when constructing

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drmModeGetResources() can fail if the DRM driver doesn't implement
modesetting. We shouldn't crash in this case, but instead error out.

This moves the call into the constructor of the MetaGpuKms, as it is
easier to fail constructing directly rather than deal with it later on.

Fixes #223.
This commit is contained in:
Iain Lane 2018-08-09 14:12:31 +01:00
parent 252dd52439
commit 27e4318868
1 changed files with 20 additions and 6 deletions
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26
src/backends/native/meta-gpu-kms.c
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@ -68,6 +68,8 @@ struct _MetaGpuKms
int max_buffer_height;
gboolean page_flips_not_supported;
MetaKmsResources resources;
};
G_DEFINE_TYPE (MetaGpuKms, meta_gpu_kms, META_TYPE_GPU)
@ -726,20 +728,29 @@ init_outputs (MetaGpuKms *gpu_kms,
setup_output_clones (gpu);
}
static void
static gboolean
meta_kms_resources_init (MetaKmsResources *resources,
int fd)
int fd,
GError **error)
{
drmModeRes *drm_resources;
unsigned int i;
drm_resources = drmModeGetResources (fd);
if (drm_resources == NULL) {
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED, "No resources");
return FALSE;
}
resources->resources = drm_resources;
resources->n_encoders = (unsigned int) drm_resources->count_encoders;
resources->encoders = g_new (drmModeEncoder *, resources->n_encoders);
for (i = 0; i < resources->n_encoders; i++)
resources->encoders[i] = drmModeGetEncoder (fd, drm_resources->encoders[i]);
return TRUE;
}
static void
@ -761,9 +772,7 @@ meta_gpu_kms_read_current (MetaGpu *gpu,
MetaGpuKms *gpu_kms = META_GPU_KMS (gpu);
MetaMonitorManager *monitor_manager =
meta_gpu_get_monitor_manager (gpu);
MetaKmsResources resources;
meta_kms_resources_init (&resources, gpu_kms->fd);
MetaKmsResources resources = gpu_kms->resources;
gpu_kms->max_buffer_width = resources.resources->max_width;
gpu_kms->max_buffer_height = resources.resources->max_height;
@ -812,6 +821,11 @@ meta_gpu_kms_new (MetaMonitorManagerKms *monitor_manager_kms,
gpu_kms->fd = kms_fd;
gpu_kms->file_path = g_strdup (kms_file_path);
if (!meta_kms_resources_init (&gpu_kms->resources, gpu_kms->fd, error)) {
g_clear_object (&gpu_kms);
return NULL;
}
drmSetClientCap (gpu_kms->fd, DRM_CLIENT_CAP_UNIVERSAL_PLANES, 1);
source = g_source_new (&kms_event_funcs, sizeof (MetaKmsSource));
@ -841,7 +855,7 @@ meta_gpu_kms_finalize (GObject *object)
meta_launcher_close_restricted (launcher, gpu_kms->fd);
g_clear_pointer (&gpu_kms->file_path, g_free);
g_source_destroy (gpu_kms->source);
g_clear_pointer (&gpu_kms->source, g_source_destroy);
free_resources (gpu_kms);