linux-kernel - Re: [PATCH v2 11/18] dmaengine: ti: k3-psil-j721e: Add entry for CSI2RX

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Message-ID: <20210531091638.6mynfeusuzlgegdr@ti.com>
Date:   Mon, 31 May 2021 14:46:40 +0530
From:   Pratyush Yadav <p.yadav@...com>
To:     Péter Ujfalusi <peter.ujfalusi@...il.com>
CC:     Maxime Ripard <mripard@...nel.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Kishon Vijay Abraham I <kishon@...com>,
        Vinod Koul <vkoul@...nel.org>,
        Steve Longerbeam <slongerbeam@...il.com>,
        Benoit Parrot <bparrot@...com>, <linux-media@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-phy@...ts.infradead.org>, <dmaengine@...r.kernel.org>,
        Vignesh Raghavendra <vigneshr@...com>,
        Tomi Valkeinen <tomi.valkeinen@...asonboard.com>,
        Chunfeng Yun <chunfeng.yun@...iatek.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>
Subject: Re: [PATCH v2 11/18] dmaengine: ti: k3-psil-j721e: Add entry for
 CSI2RX

On 31/05/21 09:51AM, Péter Ujfalusi wrote:
> 
> 
> On 26/05/2021 18:23, Pratyush Yadav wrote:
> > The CSI2RX subsystem uses PSI-L DMA to transfer frames to memory. It can
> > have up to 32 threads but the current driver only supports using one. So
> > add an entry for that one thread.
> > 
> > Signed-off-by: Pratyush Yadav <p.yadav@...com>
> > 
> > ---
> > 
> > Changes in v2:
> > - Add all 64 threads, instead of having only the one thread being
> >   currently used by the driver.
> 
> How many threads CSI2RX have? 32 (as per commit message) or 64? If I
> recall right, it is 32.

Ah, sorry I forgot to update the commit message. Each instance of CSI2RX 
has 32 threads, and J721E has 2 instances. So 64 threads total.

-- 
Regards,
Pratyush Yadav
Texas Instruments Inc.