Re: [PATCH 11/19] media: i2c: imx290: Add exposure time control

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On Thu, 21 Jul 2022 at 09:36, Laurent Pinchart
<laurent.pinchart@xxxxxxxxxxxxxxxx> wrote:
>
> Support configuring the exposure time, which is expressed as the
> complement if the exposure time (frame period minus integration time).

s/if/of

Ranges confirmed to be in accordance with the datasheet.

With the commit text typo fixed:
Reviewed-by: Dave Stevenson <dave.stevenson@xxxxxxxxxxxxxxx>

> The frame period is currently fixed.
>
> Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> ---
>  drivers/media/i2c/imx290.c | 16 ++++++++++++++--
>  1 file changed, 14 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/media/i2c/imx290.c b/drivers/media/i2c/imx290.c
> index bec326a83952..3cb024b73ee7 100644
> --- a/drivers/media/i2c/imx290.c
> +++ b/drivers/media/i2c/imx290.c
> @@ -103,6 +103,8 @@
>  #define IMX290_PGCTRL_THRU                             BIT(1)
>  #define IMX290_PGCTRL_MODE(n)                          ((n) << 4)
>
> +#define IMX290_VMAX_DEFAULT                            1125
> +
>  static const char * const imx290_supply_name[] = {
>         "vdda",
>         "vddd",
> @@ -176,7 +178,7 @@ static const char * const imx290_test_pattern_menu[] = {
>
>  static const struct imx290_regval imx290_global_init_settings[] = {
>         { IMX290_CTRL_07, IMX290_WINMODE_1080P },
> -       { IMX290_VMAX, 1125 },
> +       { IMX290_VMAX, IMX290_VMAX_DEFAULT },
>         { IMX290_EXTCK_FREQ, 0x2520 },
>         { IMX290_WINWV_OB, 12 },
>         { IMX290_WINPH, 0 },
> @@ -480,6 +482,12 @@ static int imx290_set_ctrl(struct v4l2_ctrl *ctrl)
>         case V4L2_CID_GAIN:
>                 ret = imx290_write(imx290, IMX290_GAIN, ctrl->val, NULL);
>                 break;
> +
> +       case V4L2_CID_EXPOSURE:
> +               ret = imx290_write(imx290, IMX290_SHS1,
> +                                  IMX290_VMAX_DEFAULT - ctrl->val - 1, NULL);
> +               break;
> +
>         case V4L2_CID_TEST_PATTERN:
>                 if (ctrl->val) {
>                         imx290_write(imx290, IMX290_BLKLEVEL, 0, &ret);
> @@ -1008,12 +1016,16 @@ static int imx290_probe(struct i2c_client *client)
>          */
>         imx290_entity_init_cfg(&imx290->sd, NULL);
>
> -       v4l2_ctrl_handler_init(&imx290->ctrls, 4);
> +       v4l2_ctrl_handler_init(&imx290->ctrls, 5);
>         imx290->ctrls.lock = &imx290->lock;
>
>         v4l2_ctrl_new_std(&imx290->ctrls, &imx290_ctrl_ops,
>                           V4L2_CID_GAIN, 0, 72, 1, 0);
>
> +       v4l2_ctrl_new_std(&imx290->ctrls, &imx290_ctrl_ops,
> +                         V4L2_CID_EXPOSURE, 1, IMX290_VMAX_DEFAULT - 2, 1,
> +                         IMX290_VMAX_DEFAULT - 2);
> +
>         imx290->link_freq =
>                 v4l2_ctrl_new_int_menu(&imx290->ctrls, &imx290_ctrl_ops,
>                                        V4L2_CID_LINK_FREQ,
> --
> Regards,
>
> Laurent Pinchart
>



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