Philipp Zabel e72db3b1e5 gpu: ipu-v3: add support for separate alpha channels ...

The IPUv3 can read 8-bit alpha values from a separate IDMAC channel driven
by the Alpha Transparency Controller (ATC) for the graphics IDMAC channels.
This allows to reduce memory bandwidth via a conditional read mechanism or
to support planar YUV formats with alpha transparency.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

2017-03-15 15:42:31 +01:00

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