V4L/DVB (11616): cx18: Add a work queue for deferring empty buffer handoffs to the firmware

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This change defers sending all CX18_CPU_DE_SET_MDL commands, for a stream with
an ongoing capture, by adding a work queue to handle sending such commands when
needed.  This prevents any sleeps, caused by notifying the firmware of new
usable buffers, when a V4L2 application read() is being satisfied or when
an incoming buffer is processed by the cx18-NN-in work queue thread.

Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

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This commit is contained in:

Andy Walls 2009-04-13 22:42:43 -03:00 • committed by Mauro Carvalho Chehab

parent deed75ed9f

commit 8711615951

4 changed files with 202 additions and 26 deletions

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92

drivers/media/video/cx18/cx18-driver.c

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32

drivers/media/video/cx18/cx18-driver.h

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99

drivers/media/video/cx18/cx18-streams.c

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5

drivers/media/video/cx18/cx18-streams.h

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