Hi,
On Fri, Jul 15, 2016 at 12:26:06PM -0400, Javier Martinez Canillas wrote:
> The buffer planes' dma-buf are currently mapped when buffers are queued
> from userspace but it's more appropriate to do the mapping when buffers
> are queued in the driver since that's when the actual DMA operation
On Tue, Jan 08, 2013 at 07:31:30AM -0700, Jonathan Corbet wrote:
On Tue, 08 Jan 2013 07:50:41 +0100
Marek Szyprowski m.szyprow...@samsung.com wrote:
Couldn't this performance difference be due to the usage of GFP_DMA inside
the VB2 code, like Federico's new patch series is proposing?
These are necessary to prevent dead-locks e.g. if one thread waits
in dqbuf at one end and another tries to queue a buffer at the
other end.
Signed-off-by: Michael Olbrich m.olbr...@pengutronix.de
Cc: Mauro Carvalho Chehab mche...@infradead.org
Cc: Pawel Osciak pa...@osciak.com
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drivers/media
