Quoting André Apitzsch (2023-10-24 08:30:01)
> Am Montag, dem 23.10.2023 um 23:44 +0100 schrieb Kieran Bingham:
> > Quoting André Apitzsch (2023-10-23 22:47:50)
> > > Code refinement, no functional changes.
> > >
> > > Signed-off-by: André Apitzsch <git@xxxxxxxxxxx>
> > > ---
> > > drivers/media/i2c/imx214.c | 24 +++++++++++++++++++-----
> > > 1 file changed, 19 insertions(+), 5 deletions(-)
> > >
> > > diff --git a/drivers/media/i2c/imx214.c
> > > b/drivers/media/i2c/imx214.c
> > > index 4f77ea02cc27..9218c149d4c8 100644
> > > --- a/drivers/media/i2c/imx214.c
> > > +++ b/drivers/media/i2c/imx214.c
> > > @@ -19,12 +19,23 @@
> > > #include <media/v4l2-fwnode.h>
> > > #include <media/v4l2-subdev.h>
> > >
> > > +#define IMX214_REG_MODE_SELECT 0x0100
> > > +#define IMX214_MODE_STANDBY 0x00
> > > +#define IMX214_MODE_STREAMING 0x01
> > > +
> > > #define IMX214_DEFAULT_CLK_FREQ 24000000
> > > #define IMX214_DEFAULT_LINK_FREQ 480000000
> > > #define IMX214_DEFAULT_PIXEL_RATE ((IMX214_DEFAULT_LINK_FREQ *
> > > 8LL) / 10)
> > > #define IMX214_FPS 30
> > > #define IMX214_MBUS_CODE MEDIA_BUS_FMT_SRGGB10_1X10
> > >
> > > +/* Exposure control */
> > > +#define IMX214_REG_EXPOSURE 0x0202
> > > +#define IMX214_EXPOSURE_MIN 0
> > > +#define IMX214_EXPOSURE_MAX 3184
> > > +#define IMX214_EXPOSURE_STEP 1
> > > +#define IMX214_EXPOSURE_DEFAULT 0x0c70
> >
> > I like this change, and I see that 0x0c70 was directly moved here
> > from
> > the code below. But could we replace 0xc70 here with 3184 please so
> > that
> > it's /far/ clearer that the Exposure Default == Exposure Max which is
> > otherwise hidden?
> >
> Hi Kieran,
>
> I can do that. But I propose to replace 3184 with 0x0c70 instead.
> Because that matches the entries used in the reg_8 lists
> mode_4096x2304[] and mode_1920x1080[].
>
> {0x0202, 0x0C},
> {0x0203, 0x70},
>
> What do you think?
I think exposure values are easier to read as integers than hex values.
This is the 'Coarse Integration Time' register with a unit of 'lines'.
If you have lots of time, or wish to delve deeper - we could talk about
splitting out those register tables to use CCI and/or more readable
functions ;-)
Do you have the datasheet for this sensor - or are you just working from
the information within this driver?
What device are you using to test this driver?
--
Kieran
> Regards,
> André
