linux-kernel - Re: [PATCH 00/16] CSI2RX support on J721E

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Message-ID: <20210331135121.77qxxcpkyy6zm7kl@ti.com>
Date:   Wed, 31 Mar 2021 19:21:23 +0530
From:   Pratyush Yadav <p.yadav@...com>
To:     Vinod Koul <vkoul@...nel.org>
CC:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Kishon Vijay Abraham I <kishon@...com>,
        Peter Ujfalusi <peter.ujfalusi@...il.com>,
        Maxime Ripard <mripard@...nel.org>,
        Benoit Parrot <bparrot@...com>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Alexandre Courbot <acourbot@...omium.org>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Stanimir Varbanov <stanimir.varbanov@...aro.org>,
        Helen Koike <helen.koike@...labora.com>,
        Michael Tretter <m.tretter@...gutronix.de>,
        Peter Chen <peter.chen@....com>,
        Chunfeng Yun <chunfeng.yun@...iatek.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>
Subject: Re: [PATCH 00/16] CSI2RX support on J721E

On 31/03/21 06:36PM, Vinod Koul wrote:
> On 31-03-21, 17:10, Pratyush Yadav wrote:
> > On 31/03/21 03:03PM, Vinod Koul wrote:
> > > On 30-03-21, 23:03, Pratyush Yadav wrote:
> > > > Hi,
> > > > 
> > > > This series adds support for CSI2 capture on J721E. It includes some
> > > > fixes to the Cadence CSI2RX driver, adds Rx support to Cadence DPHY
> > > > driver, and finally adds the TI CSI2RX wrapper driver.
> > > > 
> > > > Tested on TI's J721E with OV5640 sensor.
> > > > 
> > > > Paul Kocialkowski (1):
> > > >   phy: Distinguish between Rx and Tx for MIPI D-PHY with submodes
> > > > 
> > > > Pratyush Yadav (15):
> > > >   phy: cdns-dphy: Prepare for Rx support
> > > >   phy: cdns-dphy: Allow setting mode
> > > >   phy: cdns-dphy: Add Rx support
> > > >   media: cadence: csi2rx: Add external DPHY support
> > > >   media: cadence: csi2rx: Soft reset the streams before starting capture
> > > >   media: cadence: csi2rx: Set the STOP bit when stopping a stream
> > > >   media: cadence: csi2rx: Fix stream data configuration
> > > >   media: cadence: csi2rx: Turn subdev power on before starting stream
> > > >   media: cadence: csi2rx: Add wrappers for subdev calls
> > > >   dmaengine: ti: k3-psil-j721e: Add entry for CSI2RX
> > > >   dt-bindings: media: Add DT bindings for TI CSI2RX driver
> > > >   media: ti-vpe: csi2rx: Add CSI2RX support
> > > >   dt-bindings: phy: Convert Cadence DPHY binding to YAML
> > > >   dt-bindings: phy: cdns,dphy: make clocks optional
> > > >   dt-bindings: phy: cdns,dphy: add power-domains property
> > > 
> > > Is there any dependency between patches to various subsystems, if not
> > > please do consider sending a series per subsystem...
> > 
> > Without patch 1, patch 5 and later won't build. Without patch 11, patch 
> > 13 will not work.
> 
> Cover letter is a good place to mention this! And what do you mean by
> not working, do we have compile time dependencies? I agree that for
> everything to work all the pieces need to land

I have not tried it but patch 11 is not a compile time dependency. It 
should be a run time dependency. Without it the driver will probably 
fail to acquire the DMA channels and its probe will fail.

-- 
Regards,
Pratyush Yadav
Texas Instruments Inc.