diff options
| -rw-r--r-- | drivers/media/v4l2-core/videobuf2-core.c | 24 | ||||
| -rw-r--r-- | include/media/videobuf2-core.h | 1 |
2 files changed, 25 insertions, 0 deletions
diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c index 349e659d75fb..7c4489c42365 100644 --- a/drivers/media/v4l2-core/videobuf2-core.c +++ b/drivers/media/v4l2-core/videobuf2-core.c @@ -1200,6 +1200,30 @@ void vb2_buffer_done(struct vb2_buffer *vb, enum vb2_buffer_state state) EXPORT_SYMBOL_GPL(vb2_buffer_done); /** + * vb2_discard_done() - discard all buffers marked as DONE + * @q: videobuf2 queue + * + * This function is intended to be used with suspend/resume operations. It + * discards all 'done' buffers as they would be too old to be requested after + * resume. + * + * Drivers must stop the hardware and synchronize with interrupt handlers and/or + * delayed works before calling this function to make sure no buffer will be + * touched by the driver and/or hardware. + */ +void vb2_discard_done(struct vb2_queue *q) +{ + struct vb2_buffer *vb; + unsigned long flags; + + spin_lock_irqsave(&q->done_lock, flags); + list_for_each_entry(vb, &q->done_list, done_entry) + vb->state = VB2_BUF_STATE_ERROR; + spin_unlock_irqrestore(&q->done_lock, flags); +} +EXPORT_SYMBOL_GPL(vb2_discard_done); + +/** * __fill_vb2_buffer() - fill a vb2_buffer with information provided in a * v4l2_buffer by the userspace. The caller has already verified that struct * v4l2_buffer has a valid number of planes. diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h index bca25dc53f9d..8fab6fa0dbfb 100644 --- a/include/media/videobuf2-core.h +++ b/include/media/videobuf2-core.h @@ -432,6 +432,7 @@ void *vb2_plane_vaddr(struct vb2_buffer *vb, unsigned int plane_no); void *vb2_plane_cookie(struct vb2_buffer *vb, unsigned int plane_no); void vb2_buffer_done(struct vb2_buffer *vb, enum vb2_buffer_state state); +void vb2_discard_done(struct vb2_queue *q); int vb2_wait_for_all_buffers(struct vb2_queue *q); int vb2_querybuf(struct vb2_queue *q, struct v4l2_buffer *b); |