Replace the private struct vb2_dma_sg_desc with the struct sg_table so
we can benefit from all the helping functions in lib/scatterlist.c for
things like allocating the sg or compacting the descriptor
Signed-off-by: Ricardo Ribalda Delgado ricardo.riba...@gmail.com
---
drivers/media/v4l2-core
, Jul 18, 2013 at 3:34 PM, Marek Szyprowski
m.szyprow...@samsung.com wrote:
Hello,
On 7/18/2013 9:39 AM, Ricardo Ribalda Delgado wrote:
Hello again:
I have started to implemt it, but I think there is more hidden work in
this task as it seems. In order to call dma_map_sg
Hello Sylwester
I thought I had to split the API changes. Sorry :S. I will wait for
more comments and then I will resubmit.
Thanks for you comment!
On Fri, Jul 19, 2013 at 10:51 AM, Sylwester Nawrocki
s.nawro...@samsung.com wrote:
Hi Ricardo,
On 07/19/2013 09:58 AM, Ricardo Ribalda Delgado
a.hei...@gmail.com wrote:
On Fri, Jul 19, 2013 at 09:58:46AM +0200, Ricardo Ribalda Delgado wrote:
Most DMA engines have limitations regarding the number of DMA segments
(sg-buffers) that they can handle. Videobuffers can easily spread
through houndreds of pages.
In the previous aproach
) that
could not be handled by some DMA engines.
This patch tries to minimize the number of DMA segments by using
alloc_pages. In the worst case it will behave as before, but most
of the times it will reduce the number of dma segments
Signed-off-by: Ricardo Ribalda Delgado ricardo.riba
as possible.
v2: Contains feedback from Andre Heider and Sylwester Nawrocki
Andre: Fix error handling (--pages)
Sylwester: Squash p3 and p4 into p2
Ricardo Ribalda Delgado (2):
videobuf2-dma-sg: Allocate pages as contiguous as possible
videobuf2-dma-sg: Replace vb2_dma_sg_desc with sg_table
Ribalda Delgado ricardo.riba...@gmail.com
---
drivers/media/platform/marvell-ccic/mcam-core.c| 14 +--
drivers/media/v4l2-core/videobuf2-dma-sg.c | 103
drivers/staging/media/solo6x10/solo6x10-v4l2-enc.c | 20 ++--
include/media/videobuf2-dma-sg.h
, 2013 at 10:16 PM, Jonathan Corbet cor...@lwn.net wrote:
On Fri, 19 Jul 2013 19:02:33 +0200
Ricardo Ribalda Delgado ricardo.riba...@gmail.com wrote:
Most DMA engines have limitations regarding the number of DMA segments
(sg-buffers) that they can handle. Videobuffers can easily spread
through
, Ricardo Ribalda Delgado wrote:
Hello again Marek
In my system I am doing the scatter gather compaction on device
driver... But I agree that it would be better done on the vb2 layer.
For the oversize sglist we could do one of this two things.
If we want to have a simple pass processing we
:
Hello,
On 7/15/2013 11:34 AM, Ricardo Ribalda Delgado wrote:
Most DMA engines have limitations regarding the number of DMA segments
(sg-buffers) that they can handle. Videobuffers can easily spread through
houndreds of pages.
In the previous aproach, the pages were allocated individually
]);
+ i++;
} while (usize 0);
--
1.7.10.4
On Wed, Jul 17, 2013 at 11:43 AM, Ricardo Ribalda Delgado
ricardo.riba...@gmail.com wrote:
Hi Marek
alloc_pages_exact returns pages of order 0, every single page is
filled into buf-pages, that then is used by vb2_dma_sg_mmap(), that
also expects
do you prefer?
Regards!
On Wed, Jul 17, 2013 at 3:42 PM, Marek Szyprowski
m.szyprow...@samsung.com wrote:
Hello,
On 7/17/2013 11:43 AM, Ricardo Ribalda Delgado wrote:
Hi Marek
alloc_pages_exact returns pages of order 0, every single page is
filled into buf-pages, that then is used
) that
could not be handled by some DMA engines.
This patch tries to minimize the number of DMA segments by using
alloc_pages_exact. In the worst case it will behave as before, but most
of the times it will reduce the number fo dma segments
Signed-off-by: Ricardo Ribalda Delgado ricardo.riba
Hello Sakari
I get the two areas sticked together. Of course both areas of interest
have the save width.
Kind Regards :)
On Mon, Oct 15, 2012 at 10:50 PM, Sakari Ailus sakari.ai...@iki.fi wrote:
Hi Ricardo,
On Fri, Oct 12, 2012 at 09:18:42AM +0200, Ricardo Ribalda Delgado wrote:
In fact
12, 2012 at 12:32 AM, Sakari Ailus sakari.ai...@iki.fi wrote:
Hi Ricardo,
On Thu, Oct 11, 2012 at 12:40:03PM +0200, Ricardo Ribalda Delgado wrote:
I want to port an old driver for an fpga based camera to the new media
infrastructure.
By reading the doc. I think it has almost all
401 - 415 of 415 matches
Mail list logo
