On Wed, 31 Mar 2004, Russell King wrote:
On Wed, Mar 31, 2004 at 09:44:45AM +0200, Jaroslav Kysela wrote:
I think that the consensus was that using -nopage callback does not
make much sense for the DMA pages so remap_page_coherent_range() should be
used for this case when designed.
The
On Wed, Mar 31, 2004 at 10:10:22AM +0200, Jaroslav Kysela wrote:
Yes, but if we have at least one API solving this problem, the successors
should replace it completely. I think that it's much better solution than
having no way to support ARM or any other platforms with these problems in
On Wed, 31 Mar 2004, Russell King wrote:
On Wed, Mar 31, 2004 at 10:10:22AM +0200, Jaroslav Kysela wrote:
Yes, but if we have at least one API solving this problem, the successors
should replace it completely. I think that it's much better solution than
having no way to support ARM or any
On Wed, 31 Mar 2004, Russell King wrote:
The correct interface is dma_mmap_coherent().
I'm actually tempted to provide dma_mmap_coherent() and just let
everyone else whinge and moan that the API doesn't meet their
expectations.
Thanks. Evolution is the best way.
BTW, ARM also needs the
On Wed, Mar 31, 2004 at 11:07:03AM +0200, Jaroslav Kysela wrote:
Do you see any reason to ommit this settings for some cases (including
for ISA bus)? I think that dma_alloc_coherent should offer consistent
API - thus mark all allocated pages as reserved for all cases.
That was another point I
On Wed, 31 Mar 2004, Russell King wrote:
I suggest we add a load of preprocessor junk into the ALSA core and
comment exactly _why_ its needed, thereby laying the reason completely
at the door of these ill-defined APIs where questions have been asked
and responses not been received.
I'm
On Wed, Mar 31, 2004 at 11:22:56AM +0200, Jaroslav Kysela wrote:
On Wed, 31 Mar 2004, Russell King wrote:
I suggest we add a load of preprocessor junk into the ALSA core and
comment exactly _why_ its needed, thereby laying the reason completely
at the door of these ill-defined APIs where
On Wed, Mar 31, 2004 at 10:29:06AM +0200, Jaroslav Kysela wrote:
On Wed, 31 Mar 2004, Russell King wrote:
Keeping the existing -nopage will not work - there is no way to get to
a struct page on ARM given the information available to the ALSA code.
Looking to arch/arm/mm/consistent.c -
Russell King wrote:
On Wed, Mar 31, 2004 at 11:22:56AM +0200, Jaroslav Kysela wrote:
On Wed, 31 Mar 2004, Russell King wrote:
I suggest we add a load of preprocessor junk into the ALSA core and
comment exactly _why_ its needed, thereby laying the reason completely
at the door of these
: Tuesday, March 09, 2004 5:17 PM
To: Gupta, Kshitij
Cc: Jaroslav Kysela; [EMAIL PROTECTED]
Subject: Re: [Alsa-devel] buffer producer/consumer sync
On Tue, Mar 09, 2004 at 05:03:37PM +0530, Gupta, Kshitij wrote:
I was referring to a ARM implementation in the ALSA tree for our
ALSA driver
On Wed, Mar 31, 2004 at 10:32:07AM +0530, Gupta, Kshitij wrote:
I was just curious to know about by when will we be having a proper
reference driver for ARM . We are ready to help out from here if there are
any issues.
Given the kernel communities general negative reaction to trying to
On Wed, 31 Mar 2004, Russell King wrote:
On Wed, Mar 31, 2004 at 10:32:07AM +0530, Gupta, Kshitij wrote:
I was just curious to know about by when will we be having a proper
reference driver for ARM . We are ready to help out from here if there are
any issues.
Given the kernel
On Wed, Mar 31, 2004 at 09:44:45AM +0200, Jaroslav Kysela wrote:
I think that the consensus was that using -nopage callback does not
make much sense for the DMA pages so remap_page_coherent_range() should be
used for this case when designed.
The consensus was that -nopage is fine to use IFF
On Tue, 9 Mar 2004, Gupta, Kshitij wrote:
Can someone comment on this and guide a little bit to solve this problem.
Yes, on ARM platform you might have problem with MMU / cache coherency,
because appl_ptr and hw_ptr are mmaped to user space. I observed this
behaviour on SA11xx platform, too.
On Tue, 9 Mar 2004, Russell King wrote:
On Tue, Mar 09, 2004 at 10:53:57AM +0100, Jaroslav Kysela wrote:
On Tue, 9 Mar 2004, Gupta, Kshitij wrote:
Can someone comment on this and guide a little bit to solve this problem.
Yes, on ARM platform you might have problem with MMU / cache
09, 2004 3:48 PM
To: Jaroslav Kysela
Cc: Gupta, Kshitij; [EMAIL PROTECTED]
Subject: Re: [Alsa-devel] buffer producer/consumer sync
On Tue, Mar 09, 2004 at 10:53:57AM +0100, Jaroslav Kysela wrote:
On Tue, 9 Mar 2004, Gupta, Kshitij wrote:
Can someone comment on this and guide a little bit
]
[mailto:[EMAIL PROTECTED] Behalf Of Gupta,
Kshitij
Sent: Tuesday, March 09, 2004 4:11 PM
To: 'Russell King'; Jaroslav Kysela
Cc: [EMAIL PROTECTED]
Subject: RE: [Alsa-devel] buffer producer/consumer sync
hi,
Just for your information we are using OSS PCM emulation. And let
me also first
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