/*
* "No hw counter" fallback implementation of .get_vblank_counter() hook,
- * if there is no useable hardware frame counter available.
+ * if there is no usable hardware frame counter available.
*/
static u32 drm_vblank_no_hw_counter(struct drm_device *dev, unsigned int pipe)
{
* and drm_crtc_vblank_count() or drm_crtc_vblank_count_and_time()
* provide a barrier: Any writes done before calling
* drm_crtc_handle_vblank() will be visible to callers of the later
- * functions, iff the vblank count is the same or a later one.
+ * functions, if the vblank count is the same or a later one.
*
* See also &drm_vblank_crtc.count.
*
* and drm_crtc_vblank_count() or drm_crtc_vblank_count_and_time()
* provide a barrier: Any writes done before calling
* drm_crtc_handle_vblank() will be visible to callers of the later
- * functions, iff the vblank count is the same or a later one.
+ * functions, if the vblank count is the same or a later one.
*
* See also &drm_vblank_crtc.count.
*/
reply->tval_usec = ts.tv_nsec / 1000;
}
+static bool drm_wait_vblank_supported(struct drm_device *dev)
+{
+#if IS_ENABLED(CONFIG_DRM_LEGACY)
+ if (unlikely(drm_core_check_feature(dev, DRIVER_LEGACY)))
+ return dev->irq_enabled;
+#endif
+ return drm_dev_has_vblank(dev);
+}
+
int drm_wait_vblank_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
unsigned int pipe_index;
unsigned int flags, pipe, high_pipe;
- if (!dev->irq_enabled)
+ if (!drm_wait_vblank_supported(dev))
return -EOPNOTSUPP;
if (vblwait->request.type & _DRM_VBLANK_SIGNAL)
* and drm_crtc_vblank_count() or drm_crtc_vblank_count_and_time()
* provide a barrier: Any writes done before calling
* drm_crtc_handle_vblank() will be visible to callers of the later
- * functions, iff the vblank count is the same or a later one.
+ * functions, if the vblank count is the same or a later one.
*
* See also &drm_vblank_crtc.count.
*
* Get crtc VBLANK count.
*
* \param dev DRM device
- * \param data user arguement, pointing to a drm_crtc_get_sequence structure.
+ * \param data user argument, pointing to a drm_crtc_get_sequence structure.
* \param file_priv drm file private for the user's open file descriptor
*/
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EOPNOTSUPP;
- if (!dev->irq_enabled)
+ if (!drm_dev_has_vblank(dev))
return -EOPNOTSUPP;
crtc = drm_crtc_find(dev, file_priv, get_seq->crtc_id);
* Queue a event for VBLANK sequence
*
* \param dev DRM device
- * \param data user arguement, pointing to a drm_crtc_queue_sequence structure.
+ * \param data user argument, pointing to a drm_crtc_queue_sequence structure.
* \param file_priv drm file private for the user's open file descriptor
*/
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EOPNOTSUPP;
- if (!dev->irq_enabled)
+ if (!drm_dev_has_vblank(dev))
return -EOPNOTSUPP;
crtc = drm_crtc_find(dev, file_priv, queue_seq->crtc_id);