[alsa-devel] [PATCH 09/20] OMAP3: McBSP: Lower the maximum buffersize for McBSP1, 3, 4, 5

[Jarkko Nikula]

On Thu, 30 Jul 2009 15:49:32 +0300
Eduardo Valentin <eduardo.valentin at nokia.com> wrote:

> From: Peter Ujfalusi <peter.ujfalusi at nokia.com>
> 
> Do not allow applications to use the full buffer found on
> McBSP1,3,4,5. Using the full buffer in threshold mode causes
> the McBSP buffer to run dry, which can be observed as channels
> are switching (in reality the channels are shifting).
> 
...
> --- a/arch/arm/mach-omap2/mcbsp.c
> +++ b/arch/arm/mach-omap2/mcbsp.c
> @@ -129,7 +129,7 @@ static struct omap_mcbsp_platform_data
> omap34xx_mcbsp_pdata[] = { .rx_irq		=
> INT_24XX_MCBSP1_IRQ_RX, .tx_irq		=
> INT_24XX_MCBSP1_IRQ_TX, .ops		= &omap2_mcbsp_ops,
> -		.buffer_size	= 0x7F,
> +		.buffer_size	= 0x6F,
>  	},

Is it possible that also McBSP2 would require that maximum burst
transmit size should be 0x10 smaller than size of internal buffer/fifo?

-- 
Jarkko
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