iommu/dart: Initialize DART_STREAMS_ENABLE

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DART has an additional global register to control which streams are
isolated. This register is a bit redundant since DART_TCR can already
be used to control isolation and is usually initialized to DART_STREAM_ALL
by the time we get control. Some DARTs (namely the one used for the audio
controller) however have some streams disabled initially. Make sure those
work by initializing DART_STREAMS_ENABLE during reset.

Reported-by: Martin Povišer <povik@protonmail.com>
Signed-off-by: Sven Peter <sven@svenpeter.dev>
Reviewed-by: Hector Martin <marcan@marcan.st>
Link: https://lore.kernel.org/r/20211019162253.45919-1-sven@svenpeter.dev
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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Sven Peter 2021-10-19 18:22:53 +02:00 • committed by Joerg Roedel

parent 260aecd643

commit 5a009fc136

1 changed files with 5 additions and 0 deletions

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drivers/iommu/apple-dart.c

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