linux-kernel - Re: [PATCH 0/5] dmaengine: ti: edma: Multicore usage related fixes

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Date:   Wed, 4 Sep 2019 15:19:56 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Peter Ujfalusi <peter.ujfalusi@...com>
Cc:     robh+dt@...nel.org, dan.j.williams@...el.com,
        dmaengine@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-omap@...r.kernel.org
Subject: Re: [PATCH 0/5] dmaengine: ti: edma: Multicore usage related fixes

On 23-08-19, 15:56, Peter Ujfalusi wrote:
> Hi,
> 
> When other cores want to use EDMA for their use cases Linux was not playing
> nicely.
> By design EDMA is supporting shared use with shadow regions. Linux is using
> region0, others can be used by other cores.
> 
> In order to not break multicore shared usage of EDMA:
> - do not reset paRAM slots which is not allocated for Linux (reserved paRAM
>   slots)
> - Only reset region0 access registers, do not touch other regions
> - Add option for reserved channels which should not be used by Linux in a similar
>   fashion as we already have for reserved paRAM slots.

Applied 1 to 3, thanks

-- 
~Vinod