Re: [PATCH 46/94] ARM: dts: am335x-evm: Enable the McASP FIFO for audio

From: Peter Ujfalusi
Date: Wed Jul 16 2014 - 01:41:20 EST


On 07/15/2014 08:01 PM, Sam Asadi wrote:
> From: Peter Ujfalusi <peter.ujfalusi@xxxxxx>
>
> The use of FIFO in McASP can reduce the risk of audio under/overrun and
> lowers the load on the memories since the DMA will operate in bursts.
>
> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@xxxxxx>
> Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
> Signed-off-by: sam-the-6 <asadi.samuel@xxxxxxxxx>
> ---
> arch/arm/boot/dts/am335x-evm.dts | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)

What is the reason this patch is in this */94 series? What is this series of
patches anyways?
FWIW the two McASP FIFO enable patch is already in mainline and they should
not be backported to older kernels w/o the changes in the mcasp driver in 3.16.

>
> diff --git a/arch/arm/boot/dts/am335x-evm.dts b/arch/arm/boot/dts/am335x-evm.dts
> index ecb2677..e2156a5 100644
> --- a/arch/arm/boot/dts/am335x-evm.dts
> +++ b/arch/arm/boot/dts/am335x-evm.dts
> @@ -529,8 +529,8 @@
> serial-dir = < /* 0: INACTIVE, 1: TX, 2: RX */
> 0 0 1 2
> >;
> - tx-num-evt = <1>;
> - rx-num-evt = <1>;
> + tx-num-evt = <32>;
> + rx-num-evt = <32>;
> };
>
> &tps {
>


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