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Marek Szyprowski 60641e2259 [media] s5p-mfc: Use preallocated block allocator always for MFC v6+
It turned out that all versions of MFC v6+ hardware doesn't have a strict
requirement for ALL buffers to be allocated on higher addresses than the
firmware base like it was documented for MFC v5. This requirement is true
only for the device and per-context buffers. All video data buffers can be
allocated anywhere for all MFC v6+ versions. Basing on this fact, the
special DMA configuration based on two reserved memory regions is not
really needed for MFC v6+ devices, because the memory requirements for the
firmware, device and per-context buffers can be fulfilled by the simple
probe-time pre-allocated block allocator introduced in previous patch.

This patch enables support for such pre-allocated block based allocator
always for MFC v6+ devices. Due to the limitations of the memory management
subsystem the largest supported size of the pre-allocated buffer when no
CMA (Contiguous Memory Allocator) is enabled is 4 MiB.

This patch also removes the requirement to provide two reserved memory
regions for MFC v6+ devices in device tree. Now the driver is fully
functional without them.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
Tested-by: Javier Martinez Canillas <javier@osg.samsung.com>
Acked-by: Andrzej Hajda <a.hajda@samsung.com>
Tested-by: Smitha T Murthy <smitha.t@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-04-05 16:34:47 -03:00
arch Linux 4.11-rc5 2017-04-04 11:11:43 -03:00
block
certs
crypto
Documentation [media] s5p-mfc: Use preallocated block allocator always for MFC v6+ 2017-04-05 16:34:47 -03:00
drivers [media] s5p-mfc: Use preallocated block allocator always for MFC v6+ 2017-04-05 16:34:47 -03:00
firmware
fs Merge branch 'akpm' (patches from Andrew) 2017-04-01 19:45:05 -07:00
include [media] tveeprom: get rid of documentation of an unused parameter 2017-04-05 15:37:06 -03:00
init
ipc
kernel Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-04-02 09:25:10 -07:00
lib Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-04-02 09:18:59 -07:00
mm mm/hugetlb.c: don't call region_abort if region_chg fails 2017-03-31 17:13:30 -07:00
net The restriction of NFSv4 to TCP went overboard and also broke the 2017-04-01 10:43:37 -07:00
samples
scripts
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sound
tools
usr
virt
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MAINTAINERS Linux 4.11-rc5 2017-04-04 11:11:43 -03:00
Makefile Linux 4.11-rc5 2017-04-02 17:23:54 -07:00
README

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.