Lucas Stach 263c3b8044 gpu: ipu-v3: prg: wait for double buffers to be filled on channel startup ...

Wait for both double buffer to be filled when first starting a channel.
This makes channel startup a lot more reliable, probably because it allows
the internal state machine to settle before the requests from the IPU are
coming in.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
[p.zabel@pengutronix.de: rebased before switch to runtime PM]
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

2017-10-11 12:04:23 +02:00

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