Merge "msm: sde: add buf_finish callback to clear last fd"

	v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);

}

/*

 * sde_rotator_buf_finish - vb2_ops buf_finish to finalize buffer before going

 *				back to user space

 * @vb: Pointer to vb2 buffer struct.

 */

static void sde_rotator_buf_finish(struct vb2_buffer *vb)

{

	struct sde_rotator_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);

	int i;

	SDEDEV_DBG(ctx->rot_dev->dev,

			"buf_finish t:%d i:%d s:%d m:%u np:%d up:%lu\n",

			vb->type, vb->index, vb->state,

			vb->vb2_queue->memory,

			vb->num_planes,

			vb->planes[0].m.userptr);

	if (vb->vb2_queue->memory != VB2_MEMORY_USERPTR)

		return;

	/*

	 * We use userptr to tunnel fd, and fd can be the same across qbuf

	 * even though the underlying buffer is different.  Since vb2 layer

	 * optimizes memory mapping for userptr by first checking if userptr

	 * has changed, it will not trigger put_userptr if fd value does

	 * not change.  In order to force buffer release, we need to clear

	 * userptr when the current buffer is done and ready to go back to

	 * user mode. Since 0 is a valid fd, reset userptr to -1 instead.

	 */

	for (i = 0; i < vb->num_planes; i++)

		vb->planes[i].m.userptr = ~0;

}

/*

 * sde_rotator_return_all_buffers - Return all buffers with the given status.

 * @q: Pointer to vb2 buffer queue struct.

	.stop_streaming  = sde_rotator_stop_streaming,

	.wait_prepare	 = vb2_ops_wait_prepare,

	.wait_finish	 = vb2_ops_wait_finish,

	.buf_finish      = sde_rotator_buf_finish,

};

/*