linux-kernel - Re: [PATCH v4 0/2] Add IMX296 CMOS image sensor support

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Message-ID: <20191031132801.GC5018@pendragon.ideasonboard.com>
Date:   Thu, 31 Oct 2019 15:28:01 +0200
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc:     mchehab@...nel.org, robh+dt@...nel.org, sakari.ailus@....fi,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        c.barrett@...mos.com, a.brela@...mos.com, peter.griffin@...aro.org
Subject: Re: [PATCH v4 0/2] Add IMX296 CMOS image sensor support

Hi Mani,

On Thu, Oct 31, 2019 at 06:53:52PM +0530, Manivannan Sadhasivam wrote:
> On Thu, Oct 31, 2019 at 03:16:44PM +0200, Laurent Pinchart wrote:
> > On Wed, Oct 30, 2019 at 03:19:00PM +0530, Manivannan Sadhasivam wrote:
> > > Hello,
> > > 
> > > This patchset adds support for IMX296 CMOS image sensor from Sony.
> > > Sensor can be programmed through I2C and 4-wire interface but the
> > > current driver only supports I2C interface. The sensor is
> > > capable of outputting frames in CSI2 format (1 Lane). In the case
> > > of sensor resolution, driver only supports 1440x1088 at 30 FPS.
> > > 
> > > The driver has been validated using Framos IMX296 module interfaced to
> > > 96Boards Dragonboard410c.
> > 
> > I've just been made aware of your work. I also worked on an IMX296
> > sensor driver in parallel, which I will post to the list. My driver
> > doesn't hardcode the resolution but computes register values at runtime,
> > so I wonder if it could be a better option. I'll post it now.
> 
> I'm fine with it. The reason the driver is simple in the first place is, that's
> how my usual workflow is. Start small and build it big ;-)
> 
> Anyway, I'm happy if your driver gets in.

My driver sometimes has trouble finding the sensor at probe time, so
I'll study and try your code too. It could be a problem specific to my
platform (I'm testing on a custom i.MX7 board).

> > > Changes in v4:
> > > 
> > > * Fixed issues related to gain settings and few misc cleanups in driver
> > > * Documented port node and removed maxItems, default prop from dt binding
> > >   as per the review
> > > 
> > > Changes in v3:
> > > 
> > > * Fixed the reference to video-interfaces.txt in binding.
> > > 
> > > Changes in v2:
> > > 
> > > * Switched to YAML binding
> > > 
> > > Manivannan Sadhasivam (2):
> > >   dt-bindings: media: i2c: Add IMX296 CMOS sensor binding
> > >   media: i2c: Add IMX296 CMOS image sensor driver
> > > 
> > >  .../devicetree/bindings/media/i2c/imx296.yaml |  94 +++
> > >  MAINTAINERS                                   |   8 +
> > >  drivers/media/i2c/Kconfig                     |  11 +
> > >  drivers/media/i2c/Makefile                    |   1 +
> > >  drivers/media/i2c/imx296.c                    | 715 ++++++++++++++++++
> > >  5 files changed, 829 insertions(+)
> > >  create mode 100644 Documentation/devicetree/bindings/media/i2c/imx296.yaml
> > >  create mode 100644 drivers/media/i2c/imx296.c

-- 
Regards,

Laurent Pinchart