kyungmi...@gmail.com wrote:
>
> 2011/6/10 Kukjin Kim :
> > On 06/07/11 15:36, Russell King - ARM Linux wrote:
> >> I see no effort from the Samsung folk to even start considering moving
> >> to common APIs - I see precisely the opposite. They seem to have a
> >> strong desire to invent their own
2011/6/10 Kukjin Kim :
> On 06/07/11 15:36, Russell King - ARM Linux wrote:
>> I see no effort from the Samsung folk to even start considering moving
>> to common APIs - I see precisely the opposite. They seem to have a
>> strong desire to invent their own new APIs all the time rather than
>> look
On 06/07/11 15:36, Russell King - ARM Linux wrote:
> I see no effort from the Samsung folk to even start considering moving
> to common APIs - I see precisely the opposite. They seem to have a
> strong desire to invent their own new APIs all the time rather than
> look at existing APIs and discuss
On Wed, Jun 08, 2011 at 08:21:08AM +0530, Jassi Brar wrote:
> On Wed, Jun 8, 2011 at 3:11 AM, Mark Brown
> > That's fairly unusual, though - usually DMA controllers seem to support
> > chaining requests before they support circular operation, at which point
> > unless the hardware is badly misdone
On Wed, Jun 08, 2011 at 09:35:34AM +0530, Jassi Brar wrote:
> In real life, I saw that with the Samsung's SPDIF controller which has
> fifo depth only for a few samples and it gets very demanding if pro
> quality is expected. Aggravate that with high irq-latency under system
> load.
> And in such c
On Wed, Jun 8, 2011 at 3:58 AM, Russell King - ARM Linux
wrote:
>> >
>> >> 2. Circular buffer support has been added - see device_prep_dma_cyclic().
>> >
>> >> However, 2 is not really a requirement for audio - you can queue several
>> >> single slave transfers (one per period) initially, and then
On Wed, Jun 8, 2011 at 3:11 AM, Mark Brown
wrote:
> On Wed, Jun 08, 2011 at 12:31:42AM +0530, Jassi Brar wrote:
>> On Wed, Jun 8, 2011 at 12:13 AM, Mark Brown
>
>> > Circular buffers are nice from the point of view of allowing you to
>> > (providing the hardware supports it) totally disable the pe
On Wed, Jun 08, 2011 at 01:16:40AM +0530, Jassi Brar wrote:
> IMHO Samsung SoC team (not his majesty Mr Kyungmin Park) are justified
> if they are not so eager right now. Since I no more would have to spend
> sleepless nights over
> SPDIF underruns, I can side with what Kukjin Kim(Samsung maintaine
On Wed, Jun 08, 2011 at 12:31:42AM +0530, Jassi Brar wrote:
> On Wed, Jun 8, 2011 at 12:13 AM, Mark Brown
> wrote:
> > On Tue, Jun 07, 2011 at 07:29:23PM +0100, Russell King - ARM Linux wrote:
> >
> >> 2. Circular buffer support has been added - see device_prep_dma_cyclic().
> >
> >> However, 2 is
On Wed, Jun 08, 2011 at 12:31:42AM +0530, Jassi Brar wrote:
> On Wed, Jun 8, 2011 at 12:13 AM, Mark Brown
> > Circular buffers are nice from the point of view of allowing you to
> > (providing the hardware supports it) totally disable the periodic audio
> > interrupts and leave the system to run f
On Tue, Jun 7, 2011 at 11:59 PM, Russell King - ARM Linux
wrote:
>> The discussion did take off a few months ago, but we didn't reach anywhere.
>> Being able to queue request from the 'done' callback, the need of
>> circular buffer
>> API (possibly a free-running one too) and callbacks in irq-cont
On Wed, Jun 8, 2011 at 12:13 AM, Mark Brown
wrote:
> On Tue, Jun 07, 2011 at 07:29:23PM +0100, Russell King - ARM Linux wrote:
>
>> 2. Circular buffer support has been added - see device_prep_dma_cyclic().
>
>> However, 2 is not really a requirement for audio - you can queue several
>> single slav
On Tue, Jun 07, 2011 at 07:29:23PM +0100, Russell King - ARM Linux wrote:
> 2. Circular buffer support has been added - see device_prep_dma_cyclic().
> However, 2 is not really a requirement for audio - you can queue several
> single slave transfers (one per period) initially, and then you get
>
On Tue, Jun 07, 2011 at 03:45:18PM +0530, Jassi Brar wrote:
> On Tue, Jun 7, 2011 at 1:45 PM, Russell King - ARM Linux
> wrote:
> > On Tue, Jun 07, 2011 at 01:39:43PM +0530, Jassi Brar wrote:
> >> Unfortunately, no. There are some features of Samsung's DMA API that
> >> the drivers have come to re
Hi Alim,
On 7 June 2011 13:18, root wrote:
> Signed-off-by: alim.akhtar
> ---
> arch/arm/configs/exynos4_defconfig | 1 +
> arch/arm/configs/s5p64x0_defconfig | 1 +
> arch/arm/configs/s5pc100_defconfig | 1 +
> arch/arm/configs/s5pv210_defconfig | 1 +
> arch/arm/plat-samsung/Kconf
On Tue, 2011-06-07 at 15:45 +0530, Linus Walleij wrote:
> On Tue, Jun 7, 2011 at 10:09 AM, Jassi Brar wrote:
>
> > There are some features of Samsung's DMA API that
> > the drivers have come to rely upon.
>
> Can we get an overview of what these features are?
>
> When I look at this specific co
On Tue, Jun 7, 2011 at 10:09 AM, Jassi Brar wrote:
> There are some features of Samsung's DMA API that
> the drivers have come to rely upon.
Can we get an overview of what these features are?
When I look at this specific code I cannot see anything that
the dmaengine does not already support or
On Tue, Jun 7, 2011 at 1:45 PM, Russell King - ARM Linux
wrote:
> On Tue, Jun 07, 2011 at 01:39:43PM +0530, Jassi Brar wrote:
>> Unfortunately, no. There are some features of Samsung's DMA API that
>> the drivers have come to rely upon.
>> Besides, I am not particularly a fan of the generic API. A
On Tue, Jun 7, 2011 at 5:15 PM, Russell King - ARM Linux
wrote:
> On Tue, Jun 07, 2011 at 01:39:43PM +0530, Jassi Brar wrote:
>> Unfortunately, no. There are some features of Samsung's DMA API that
>> the drivers have come to rely upon.
>> Besides, I am not particularly a fan of the generic API. A
On Tue, Jun 07, 2011 at 01:39:43PM +0530, Jassi Brar wrote:
> Unfortunately, no. There are some features of Samsung's DMA API that
> the drivers have come to rely upon.
> Besides, I am not particularly a fan of the generic API. And IIRC,
> neither is Ben Dooks, the designer of the
> Samsung's DMA A
On Tue, Jun 7, 2011 at 1:30 PM, Kyungmin Park wrote:
>
> As I know there's are PL330 DMA implementation by
> MODULE_AUTHOR("Jaswinder Singh ");
Thanks for CC'ing me, though my current contact is
jaswinder.si...@linaro.org or jassisinghb...@gmail.com
Perhaps I need to change the email in all locati
On Tue, Jun 7, 2011 at 1:18 PM, root wrote:
> Signed-off-by: alim.akhtar
> ---
> arch/arm/configs/exynos4_defconfig | 1 +
> arch/arm/configs/s5p64x0_defconfig | 1 +
> arch/arm/configs/s5pc100_defconfig | 1 +
> arch/arm/configs/s5pv210_defconfig | 1 +
> arch/arm/plat-samsung/Kconf
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