linux-kernel - Re: [linux-sunxi] [PATCH v4 2/2] media: V3s: Add support for Allwinner CSI.

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Date:   Fri, 22 Dec 2017 18:55:47 +0800
From:   Yong <yong.deng@...ewell.com>
To:     Priit Laes <plaes@...es.org>
Cc:     Maxime Ripard <maxime.ripard@...e-electrons.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Chen-Yu Tsai <wens@...e.org>,
        "David S. Miller" <davem@...emloft.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Randy Dunlap <rdunlap@...radead.org>,
        Hans Verkuil <hans.verkuil@...co.com>,
        Stanimir Varbanov <stanimir.varbanov@...aro.org>,
        Hugues Fruchet <hugues.fruchet@...com>,
        Yannick Fertre <yannick.fertre@...com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Arnd Bergmann <arnd@...db.de>,
        Benjamin Gaignard <benjamin.gaignard@...aro.org>,
        Ramesh Shanmugasundaram <ramesh.shanmugasundaram@...renesas.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Rick Chang <rick.chang@...iatek.com>,
        linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...glegroups.com
Subject: Re: [linux-sunxi] [PATCH v4 2/2] media: V3s: Add support for
 Allwinner CSI.

Hi,

On Fri, 22 Dec 2017 10:21:56 +0000
Priit Laes <plaes@...es.org> wrote:

> On Fri, Dec 22, 2017 at 05:47:00PM +0800, Yong Deng wrote:
> > Allwinner V3s SoC have two CSI module. CSI0 is used for MIPI interface
> > and CSI1 is used for parallel interface. This is not documented in
> > datasheet but by testing and guess.
> > 
> > This patch implement a v4l2 framework driver for it.

...

> > +	if ((sdev->csi.v4l2_ep.bus_type == V4L2_MBUS_PARALLEL
> > +	      || sdev->csi.v4l2_ep.bus_type == V4L2_MBUS_BT656)
> > +	     && sdev->csi.v4l2_ep.bus.parallel.bus_width == 16) {
> > +		switch (pixformat) {
> > +		case V4L2_PIX_FMT_HM12:
> > +		case V4L2_PIX_FMT_NV12:
> > +		case V4L2_PIX_FMT_NV21:
> > +		case V4L2_PIX_FMT_NV16:
> > +		case V4L2_PIX_FMT_NV61:
> > +		case V4L2_PIX_FMT_YUV420:
> > +		case V4L2_PIX_FMT_YVU420:
> > +		case V4L2_PIX_FMT_YUV422P:
> > +			switch (mbus_code) {
> > +			case MEDIA_BUS_FMT_UYVY8_1X16:
> > +			case MEDIA_BUS_FMT_VYUY8_1X16:
> > +			case MEDIA_BUS_FMT_YUYV8_1X16:
> > +			case MEDIA_BUS_FMT_YVYU8_1X16:
> > +				return true;
> > +			}
> > +			break;
> > +		}
> Should we add default cases and warning messages here for debug purposes?

OK. I will add all the default cases and messages.

Thanks,
Yong