media: vsp1: wpf: Add writeback support

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Add support for the writeback feature of the WPF, to enable capturing
frames at the WPF output for display pipelines. To enable writeback the
vsp1_rwpf structure mem field must be set to the address of the
writeback buffer and the writeback field set to true before the WPF
.configure_stream() and .configure_partition() are called. The WPF will
enable writeback in the display list for a single frame, and writeback
will then be automatically disabled.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Reviewed-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

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This commit is contained in:

Laurent Pinchart 2019-02-20 18:01:57 +02:00

parent 5c7de45a43

commit 9ec5742b69

2 changed files with 58 additions and 9 deletions

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1

drivers/media/platform/vsp1/vsp1_rwpf.h

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66

drivers/media/platform/vsp1/vsp1_wpf.c

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