/**
* Open file.
*
* \param inode device inode
* \param filp file pointer.
* \return zero on success or a negative number on failure.
*
* Searches the DRM device with the same minor number, calls open_helper(), and
* increments the device open count. If the open count was previous at zero,
* i.e., it's the first that the device is open, then calls setup().
*/
int drm_open(struct inode *inode, struct file *filp)
{
struct drm_device *dev = NULL;
int minor_id = iminor(inode);
struct drm_minor *minor;
int retcode = 0;
minor = idr_find(&drm_minors_idr, minor_id);
if (!minor)
return -ENODEV;
if (!(dev = minor->dev))
return -ENODEV;
if (drm_device_is_unplugged(dev))
return -ENODEV;
retcode = drm_open_helper(inode, filp, dev);
if (!retcode) {
atomic_inc(&dev->counts[_DRM_STAT_OPENS]);
if (!dev->open_count++)
retcode = drm_setup(dev);
}
if (!retcode) {
mutex_lock(&dev->struct_mutex);
if (dev->dev_mapping == NULL)
dev->dev_mapping = &inode->i_data;
/* ihold ensures nobody can remove inode with our i_data */
ihold(container_of(dev->dev_mapping, struct inode, i_data));
inode->i_mapping = dev->dev_mapping;
filp->f_mapping = dev->dev_mapping;
mutex_unlock(&dev->struct_mutex);
}
int
drm_open(struct dev_open_args *ap)
{
struct cdev *kdev = ap->a_head.a_dev;
int flags = ap->a_oflags;
int fmt = 0;
struct thread *p = curthread;
struct drm_device *dev;
int retcode;
dev = DRIVER_SOFTC(minor(kdev));
if (dev == NULL)
return (ENXIO);
DRM_DEBUG("open_count = %d\n", dev->open_count);
retcode = drm_open_helper(kdev, flags, fmt, p, dev, ap->a_fp);
if (retcode == 0) {
atomic_inc(&dev->counts[_DRM_STAT_OPENS]);
DRM_LOCK(dev);
device_busy(dev->dev);
if (!dev->open_count++)
retcode = drm_setup(dev);
DRM_UNLOCK(dev);
}
DRM_DEBUG("return %d\n", retcode);
return (retcode);
}
if (!minor)
return -ENODEV;
if (!(dev = minor->dev))
return -ENODEV;
if (drm_device_is_unplugged(dev))
return -ENODEV;
retcode = drm_open_helper(inode, filp, dev);
if (!retcode) {
atomic_inc(&dev->counts[_DRM_STAT_OPENS]);
<<<<<<< HEAD
<<<<<<< HEAD
if (!dev->open_count++)
retcode = drm_setup(dev);
=======
=======
>>>>>>> ae1773bb70f3d7cf73324ce8fba787e01d8fa9f2
if (!dev->open_count++) {
retcode = drm_setup(dev);
if (retcode)
dev->open_count--;
}
<<<<<<< HEAD
>>>>>>> 73a10a64c2f389351ff1594d88983f47c8de08f0
=======
>>>>>>> ae1773bb70f3d7cf73324ce8fba787e01d8fa9f2
}
if (!retcode) {
mutex_lock(&dev->struct_mutex);
static void *gfx_ctx_drm_init(void *video_driver)
{
int fd, i;
unsigned monitor_index;
unsigned gpu_index = 0;
const char *gpu = NULL;
struct string_list *gpu_descriptors = NULL;
gfx_ctx_drm_data_t *drm = (gfx_ctx_drm_data_t*)
calloc(1, sizeof(gfx_ctx_drm_data_t));
if (!drm)
return NULL;
gpu_descriptors = dir_list_new("/dev/dri", NULL, false, true, false, false);
nextgpu:
free_drm_resources(drm);
if (!gpu_descriptors || gpu_index == gpu_descriptors->size)
{
RARCH_ERR("[KMS]: Couldn't find a suitable DRM device.\n");
goto error;
}
gpu = gpu_descriptors->elems[gpu_index++].data;
drm->drm = filestream_open(gpu, RFILE_MODE_READ_WRITE, -1);
if (!drm->drm)
{
RARCH_WARN("[KMS]: Couldn't open DRM device.\n");
goto nextgpu;
}
fd = filestream_get_fd(drm->drm);
if (!drm_get_resources(fd))
goto nextgpu;
if (!drm_get_connector(fd))
goto nextgpu;
if (!drm_get_encoder(fd))
goto nextgpu;
drm_setup(fd);
/* First mode is assumed to be the "optimal"
* one for get_video_size() purposes. */
drm->fb_width = g_drm_connector->modes[0].hdisplay;
drm->fb_height = g_drm_connector->modes[0].vdisplay;
g_gbm_dev = gbm_create_device(fd);
if (!g_gbm_dev)
{
RARCH_WARN("[KMS]: Couldn't create GBM device.\n");
goto nextgpu;
}
dir_list_free(gpu_descriptors);
/* Setup the flip handler. */
g_drm_fds.fd = fd;
g_drm_fds.events = POLLIN;
g_drm_evctx.version = DRM_EVENT_CONTEXT_VERSION;
g_drm_evctx.page_flip_handler = drm_flip_handler;
g_drm_fd = fd;
return drm;
error:
dir_list_free(gpu_descriptors);
gfx_ctx_drm_destroy_resources(drm);
if (drm)
free(drm);
return NULL;
}
