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

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Message-ID: <53C61057.7000704@ti.com>
Date:	Wed, 16 Jul 2014 08:40:39 +0300
From:	Peter Ujfalusi <peter.ujfalusi@...com>
To:	Sam Asadi <asadi.samuel@...il.com>, <gregkh@...uxfoundation.org>
CC:	<devel@...verdev.osuosl.org>, <linux-kernel@...r.kernel.org>,
	Tony Lindgren <tony@...mide.com>
Subject: Re: [PATCH 46/94] ARM: dts: am335x-evm: Enable the McASP FIFO for
 audio

On 07/15/2014 08:01 PM, Sam Asadi wrote:
> From: Peter Ujfalusi <peter.ujfalusi@...com>
> 
> 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@...com>
> Signed-off-by: Tony Lindgren <tony@...mide.com>
> Signed-off-by: sam-the-6 <asadi.samuel@...il.com>
> ---
>  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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