linux-kernel - Re: [PATCH] dmaengine: ti: k3-udma-glue: move psi-l pairing in channel en/dis functions

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Message-ID: <c9857385-1af4-55eb-722f-cd8b00512378@ti.com>
Date:   Wed, 4 Nov 2020 13:32:20 +0200
From:   Grygorii Strashko <grygorii.strashko@...com>
To:     Peter Ujfalusi <peter.ujfalusi@...com>,
        Vinod Koul <vkoul@...nel.org>, <dmaengine@...r.kernel.org>
CC:     Sekhar Nori <nsekhar@...com>, <linux-kernel@...r.kernel.org>,
        Vignesh Raghavendra <vigneshr@...com>
Subject: Re: [PATCH] dmaengine: ti: k3-udma-glue: move psi-l pairing in
 channel en/dis functions



On 02/11/2020 09:46, Peter Ujfalusi wrote:
> 
> 
> On 30/10/2020 22.30, Grygorii Strashko wrote:
>> The NAVSS UDMA will stuck if target IP module is disabled by PM while PSI-L
>> threads are paired UDMA<->IP and no further transfers is possible. This
>> could be the case for IPs J721E Main CPSW (cpsw9g).
>>
>> Hence, to avoid such situation do PSI-L threads pairing only when UDMA
>> channel is going to be enabled as at this time DMA consumer module expected
>> to be active already.
> 
> Is this patch on top of the AM64 (BCDMA/PKTDMA) series or not?
> Will it cause any conflict?

No. It was not based on top of AM64 series and I've not checked for conflicts.

> 
> Acked-by: Peter Ujfalusi <peter.ujfalusi@...com>
> 
> 
>> Signed-off-by: Grygorii Strashko <grygorii.strashko@...com>
>> ---
>>   drivers/dma/ti/k3-udma-glue.c | 64 +++++++++++++++++++++--------------
>>   1 file changed, 38 insertions(+), 26 deletions(-)

...

-- 
Best regards,
grygorii