linux-kernel - Re: [PATCH] dmaengine: edma: Use early completion for intermediate paRAM set in slave

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Message-ID: <20160608032755.GN16910@localhost>
Date:	Wed, 8 Jun 2016 08:57:55 +0530
From:	Vinod Koul <vinod.koul@...el.com>
To:	Peter Ujfalusi <peter.ujfalusi@...com>
Cc:	dan.j.williams@...el.com, dmaengine@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, nsekhar@...com,
	tony@...mide.com
Subject: Re: [PATCH] dmaengine: edma: Use early completion for intermediate
 paRAM set in slave_sg

On Tue, Jun 07, 2016 at 11:19:44AM +0300, Peter Ujfalusi wrote:
> The driver limits the physical number of paRAM slots to be used by channels.
> If the transfer needs more slots (more SGs) then the transfer is broken up
> to smaller chunks. When the chunk is finished the driver will rewrite the
> physical slots and continues the transfer. This set up time can take some
> time and we might miss DMA events. If the intermediate set completion is
> using early completion (the interrupt will happen when the last slot is
> issued to the TPTC and not when the transfer is finished by the TPTC) we
> will have a bit more time to update the paRAM slots and less likely to have
> missed events.

Applied, thanks

-- 
~Vinod