tree d01f02172f258ea722460b3bb246d2907dc5902f
parent bce6f087a958a21500c51a9e63a5f578f5b0510c
author Steve Longerbeam <slongerbeam@gmail.com> 1403744742 -0700
committer Philipp Zabel <p.zabel@pengutronix.de> 1409662549 +0200

gpu: ipu-v3: Add __ipu_idmac_reset_current_buffer()

Adds __ipu_idmac_reset_current_buffer() that resets a channel's
internal current buffer pointer so that transfers start from buffer
0 on the next channel enable.

This operation is required for channel linking to work correctly,
for instance video capture pipelines that carry out image rotations
will fail after the first streaming unless this function is called
for each channel before re-enabling the channels.

Signed-off-by: Steve Longerbeam <steve_longerbeam@mentor.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>