static void listConnectorProperties(void)
{
int i;
drmModeConnectorPtr c;
for (i = 0; i < res->count_connectors; i++) {
c = drmModeGetConnector(fd, res->connectors[i]);
if (!c) {
fprintf(stderr, "Could not get connector %u: %s\n",
res->connectors[i], strerror(errno));
continue;
}
printf("Connector %u (%s-%u)\n", c->connector_id,
connector_type_str(c->connector_type),
c->connector_type_id);
listObjectProperties(c->connector_id,
DRM_MODE_OBJECT_CONNECTOR);
drmModeFreeConnector(c);
}
}
int
main(int argc, char **argv)
{
int fd;
uint32_t handle[MAX_VMS], stride[MAX_VMS];
drmModeRes *resources;
drmModeConnector *connector;
drmModeEncoder *encoder;
drmModeModeInfo *mode;
int i;
uint32_t fb_id[MAX_VMS], total_vms = 0, current_vm;
struct drm_i915_gem_vgtfb create;
fd = open("/dev/dri/card0", O_RDWR);
drmSetMaster(fd);
/* Find the first available connector with modes */
resources = drmModeGetResources(fd);
if (!resources) {
fprintf(stderr, "drmModeGetResources failed\n");
return -1;
}
for (i = 0; i < resources->count_connectors; i++) {
connector = drmModeGetConnector(fd, resources->connectors[i]);
if (connector == NULL)
continue;
if (connector->connection == DRM_MODE_CONNECTED &&
connector->count_modes > 0)
break;
drmModeFreeConnector(connector);
}
if (i == resources->count_connectors) {
fprintf(stderr, "No currently active connector found.\n");
return -1;
}
printf("Using connector: %s\n", connector_type_str(connector->connector_type));
for (i = 0; i < resources->count_encoders; i++) {
encoder = drmModeGetEncoder(fd, resources->encoders[i]);
if (encoder == NULL)
continue;
if (encoder->encoder_id == connector->encoder_id)
break;
drmModeFreeEncoder(encoder);
}
for (i = 0; i < connector->count_modes; i++) {
mode = &connector->modes[i];
if (!strcmp(mode->name, "1680x1050"))
break;
}
printf("Using mode: %s\n", mode->name);
for (i = 0; i < (argc - 1) && i < MAX_VMS; i++) {
int ret;
create.vmid = atoi(argv[i+1]);
printf("Requesting object for VM %d\n", create.vmid);
if (ret = drmIoctl(fd, DRM_IOCTL_I915_GEM_VGTFB, &create)) {
printf("drmIoctl failed for domain %d. ret = %d\n", create.vmid, ret);
continue;
}
handle[i] = create.handle;
stride[i] = create.stride;
/* Create a KMS framebuffer handle to set a mode with */
if (ret = drmModeAddFB(fd, mode->hdisplay, mode->vdisplay, 24, 32, stride[i], handle[i], &fb_id[i])) {
printf("drmModeAddFB failed for handle %d. ret = %d\n", handle[i], ret);
continue;
}
total_vms++;
}
drmDropMaster(fd);
if (total_vms == 0)
return -1;
current_vm = 0;
do {
drmSetMaster(fd);
drmModeSetCrtc(fd, encoder->crtc_id, fb_id[current_vm], 0, 0, &connector->connector_id, 1, mode);
current_vm++;
current_vm %= total_vms;
drmDropMaster(fd);
} while (getchar() != EOF);
return 0;
}
