Re: [PATCH 09/13] media: i2c: imx214: Extract format and crop settings

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On Mon, Sep 2, 2024 at 11:54 PM André Apitzsch via B4 Relay
<devnull+git.apitzsch.eu@xxxxxxxxxx> wrote:
>
> From: André Apitzsch <git@xxxxxxxxxxx>
>
> Remove format and crop settings from register sequences and set them
> programmatically.
>
> Signed-off-by: André Apitzsch <git@xxxxxxxxxxx>
> ---
>  drivers/media/i2c/imx214.c | 137 ++++++++++++++++++++++++++++++++++-----------
>  1 file changed, 105 insertions(+), 32 deletions(-)
>
> diff --git a/drivers/media/i2c/imx214.c b/drivers/media/i2c/imx214.c
> index 9f5a57aebb86..733f55257585 100644
> --- a/drivers/media/i2c/imx214.c
> +++ b/drivers/media/i2c/imx214.c
> @@ -132,6 +132,9 @@
>  #define IMX214_BINNING_NONE            0
>  #define IMX214_BINNING_ENABLE          1
>  #define IMX214_REG_BINNING_TYPE                CCI_REG8(0x0901)
> +#define IMX214_BINNING_1X1             0
> +#define IMX214_BINNING_2X2             0x22
> +#define IMX214_BINNING_4X4             0x44
>  #define IMX214_REG_BINNING_WEIGHTING   CCI_REG8(0x0902)
>  #define IMX214_BINNING_AVERAGE         0x00
>  #define IMX214_BINNING_SUMMED          0x01
> @@ -214,36 +217,22 @@ static const struct cci_reg_sequence mode_4096x2304[] = {
>         { IMX214_REG_HDR_MODE, IMX214_HDR_MODE_OFF },
>         { IMX214_REG_HDR_RES_REDUCTION, IMX214_HDR_RES_REDU_THROUGH },
>         { IMX214_REG_EXPOSURE_RATIO, 1 },
> -       { IMX214_REG_X_ADD_STA, 56 },
> -       { IMX214_REG_Y_ADD_STA, 408 },
> -       { IMX214_REG_X_ADD_END, 4151 },
> -       { IMX214_REG_Y_ADD_END, 2711 },
>         { IMX214_REG_X_EVEN_INC, 1 },
>         { IMX214_REG_X_ODD_INC, 1 },
>         { IMX214_REG_Y_EVEN_INC, 1 },
>         { IMX214_REG_Y_ODD_INC, 1 },
> -       { IMX214_REG_BINNING_MODE, IMX214_BINNING_NONE },
> -       { IMX214_REG_BINNING_TYPE, 0 },
>         { IMX214_REG_BINNING_WEIGHTING, IMX214_BINNING_AVERAGE },
>         { CCI_REG8(0x3000), 0x35 },
>         { CCI_REG8(0x3054), 0x01 },
>         { CCI_REG8(0x305C), 0x11 },
>
> -       { IMX214_REG_CSI_DATA_FORMAT, IMX214_CSI_DATA_FORMAT_RAW10 },
> -       { IMX214_REG_X_OUTPUT_SIZE, 4096 },
> -       { IMX214_REG_Y_OUTPUT_SIZE, 2304 },
>         { IMX214_REG_SCALE_MODE, IMX214_SCALE_NONE },
>         { IMX214_REG_SCALE_M, 2 },
> -       { IMX214_REG_DIG_CROP_X_OFFSET, 0 },
> -       { IMX214_REG_DIG_CROP_Y_OFFSET, 0 },
> -       { IMX214_REG_DIG_CROP_WIDTH, 4096 },
> -       { IMX214_REG_DIG_CROP_HEIGHT, 2304 },
>
>         { IMX214_REG_VTPXCK_DIV, 5 },
>         { IMX214_REG_VTSYCK_DIV, 2 },
>         { IMX214_REG_PREPLLCK_VT_DIV, 3 },
>         { IMX214_REG_PLL_VT_MPY, 150 },
> -       { IMX214_REG_OPPXCK_DIV, 10 },
>         { IMX214_REG_OPSYCK_DIV, 1 },
>         { IMX214_REG_PLL_MULT_DRIV, IMX214_PLL_SINGLE },
>
> @@ -284,36 +273,22 @@ static const struct cci_reg_sequence mode_1920x1080[] = {
>         { IMX214_REG_HDR_MODE, IMX214_HDR_MODE_OFF },
>         { IMX214_REG_HDR_RES_REDUCTION, IMX214_HDR_RES_REDU_THROUGH },
>         { IMX214_REG_EXPOSURE_RATIO, 1 },
> -       { IMX214_REG_X_ADD_STA, 1144 },
> -       { IMX214_REG_Y_ADD_STA, 1020 },
> -       { IMX214_REG_X_ADD_END, 3063 },
> -       { IMX214_REG_Y_ADD_END, 2099 },
>         { IMX214_REG_X_EVEN_INC, 1 },
>         { IMX214_REG_X_ODD_INC, 1 },
>         { IMX214_REG_Y_EVEN_INC, 1 },
>         { IMX214_REG_Y_ODD_INC, 1 },
> -       { IMX214_REG_BINNING_MODE, IMX214_BINNING_NONE },
> -       { IMX214_REG_BINNING_TYPE, 0 },
>         { IMX214_REG_BINNING_WEIGHTING, IMX214_BINNING_AVERAGE },
>         { CCI_REG8(0x3000), 0x35 },
>         { CCI_REG8(0x3054), 0x01 },
>         { CCI_REG8(0x305C), 0x11 },
>
> -       { IMX214_REG_CSI_DATA_FORMAT, IMX214_CSI_DATA_FORMAT_RAW10 },
> -       { IMX214_REG_X_OUTPUT_SIZE, 1920 },
> -       { IMX214_REG_Y_OUTPUT_SIZE, 1080 },
>         { IMX214_REG_SCALE_MODE, IMX214_SCALE_NONE },
>         { IMX214_REG_SCALE_M, 2 },
> -       { IMX214_REG_DIG_CROP_X_OFFSET, 0 },
> -       { IMX214_REG_DIG_CROP_Y_OFFSET, 0 },
> -       { IMX214_REG_DIG_CROP_WIDTH, 1920 },
> -       { IMX214_REG_DIG_CROP_HEIGHT, 1080 },
>
>         { IMX214_REG_VTPXCK_DIV, 5 },
>         { IMX214_REG_VTSYCK_DIV, 2 },
>         { IMX214_REG_PREPLLCK_VT_DIV, 3 },
>         { IMX214_REG_PLL_VT_MPY, 150 },
> -       { IMX214_REG_OPPXCK_DIV, 10 },
>         { IMX214_REG_OPSYCK_DIV, 1 },
>         { IMX214_REG_PLL_MULT_DRIV, IMX214_PLL_SINGLE },
>
> @@ -626,6 +601,7 @@ static int imx214_set_format(struct v4l2_subdev *sd,
>         struct v4l2_mbus_framefmt *__format;
>         struct v4l2_rect *__crop;
>         const struct imx214_mode *mode;
> +       unsigned int bin_h, bin_v, bin;
>
>         mode = v4l2_find_nearest_size(imx214_modes,
>                                       ARRAY_SIZE(imx214_modes), width, height,
> @@ -637,9 +613,32 @@ static int imx214_set_format(struct v4l2_subdev *sd,
>         __format = v4l2_subdev_state_get_format(sd_state, 0);
>         *__format = format->format;
>
> +       /*
> +        * Use binning to maximize the crop rectangle size, and centre it in the
> +        * sensor.
> +        */

We only support two modes. Wouldn't it be easier to add a new
"binning" field to imx124_mode?

> +       bin_h = IMX214_PIXEL_ARRAY_WIDTH / __format->width;
> +       bin_v = IMX214_PIXEL_ARRAY_HEIGHT / __format->height;
> +
> +       switch (min(bin_h, bin_v)) {
> +       case 1:
> +               bin = 1;
> +               break;
> +       case 2:
> +       case 3:
> +               bin = 2;
> +               break;
> +       case 4:
> +       default:
> +               bin = 4;
> +               break;
> +       }
> +
>         __crop = v4l2_subdev_state_get_crop(sd_state, 0);
> -       __crop->width = mode->width;
> -       __crop->height = mode->height;
> +       __crop->width = __format->width * bin;
> +       __crop->height = __format->height * bin;
> +       __crop->left = (IMX214_NATIVE_WIDTH - __crop->width) / 2;
> +       __crop->top = (IMX214_NATIVE_HEIGHT - __crop->height) / 2;
>
>         if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
>                 int exposure_max;
> @@ -845,6 +844,71 @@ static int imx214_ctrls_init(struct imx214 *imx214)
>         return 0;
>  };
>
> +static int imx214_set_framefmt(struct imx214 *imx214,
> +                              struct v4l2_subdev_state *state)
> +{
> +       const struct v4l2_mbus_framefmt *format;
> +       const struct v4l2_rect *crop;
> +       unsigned int bpp;
> +       u64 bin_mode;
> +       u64 bin_type;
> +       int ret = 0;
> +
> +       format = v4l2_subdev_state_get_format(state, 0);
> +       crop = v4l2_subdev_state_get_crop(state, 0);
> +

This code does not do anything, bpp is always 10.
We can remove the switch and setting IMX214_REG_CSI_DATA_FORMAT
 IMX214_REG_OPPXCK_DIV programmatically


> +       switch (format->code) {
> +       case MEDIA_BUS_FMT_SRGGB10_1X10:
> +       case MEDIA_BUS_FMT_SGRBG10_1X10:
> +       case MEDIA_BUS_FMT_SGBRG10_1X10:
> +       case MEDIA_BUS_FMT_SBGGR10_1X10:
> +       default:
> +               bpp = 10;
> +               break;
> +       }



> +
> +       cci_write(imx214->regmap, IMX214_REG_X_ADD_STA,
> +                 crop->left - IMX214_PIXEL_ARRAY_LEFT, &ret);
> +       cci_write(imx214->regmap, IMX214_REG_X_ADD_END,
> +                 crop->left - IMX214_PIXEL_ARRAY_LEFT + crop->width - 1, &ret);
> +       cci_write(imx214->regmap, IMX214_REG_Y_ADD_STA,
> +                 crop->top - IMX214_PIXEL_ARRAY_TOP, &ret);
> +       cci_write(imx214->regmap, IMX214_REG_Y_ADD_END,
> +                 crop->top - IMX214_PIXEL_ARRAY_TOP + crop->height - 1, &ret);
> +
> +       /* Proper setting is required even if cropping is not used */
> +       cci_write(imx214->regmap, IMX214_REG_DIG_CROP_WIDTH, crop->width, &ret);
> +       cci_write(imx214->regmap, IMX214_REG_DIG_CROP_HEIGHT, crop->height, &ret);
> +
> +       switch (crop->width / format->width) {
> +       case 1:
> +       default:
> +               bin_mode = IMX214_BINNING_NONE;
> +               bin_type = IMX214_BINNING_1X1;
> +               break;
> +       case 2:
> +               bin_mode = IMX214_BINNING_ENABLE;
> +               bin_type = IMX214_BINNING_2X2;
> +               break;
> +       case 4:
> +               bin_mode = IMX214_BINNING_ENABLE;
> +               bin_type = IMX214_BINNING_4X4;
> +               break;
> +       }
> +
> +       cci_write(imx214->regmap, IMX214_REG_BINNING_MODE, bin_mode, &ret);
> +       cci_write(imx214->regmap, IMX214_REG_BINNING_TYPE, bin_type, &ret);
> +
> +       cci_write(imx214->regmap, IMX214_REG_X_OUTPUT_SIZE, format->width, &ret);
> +       cci_write(imx214->regmap, IMX214_REG_Y_OUTPUT_SIZE, format->height, &ret);
> +
> +       cci_write(imx214->regmap, IMX214_REG_CSI_DATA_FORMAT,
> +                 (bpp << 8) | bpp, &ret);
> +       cci_write(imx214->regmap, IMX214_REG_OPPXCK_DIV, bpp, &ret);
> +
> +       return ret;
> +};
> +
>  static int imx214_configure_lanes(struct imx214 *imx214)
>  {
>         return cci_write(imx214->regmap, IMX214_REG_CSI_LANE_MODE,
> @@ -852,7 +916,8 @@ static int imx214_configure_lanes(struct imx214 *imx214)
>                          IMX214_CSI_4_LANE_MODE, NULL);
>  };
>
> -static int imx214_start_streaming(struct imx214 *imx214)
> +static int imx214_start_streaming(struct imx214 *imx214,
> +                                 struct v4l2_subdev_state *state)
>  {
>         const struct imx214_mode *mode;
>         int ret;
> @@ -871,6 +936,14 @@ static int imx214_start_streaming(struct imx214 *imx214)
>                 return ret;
>         }
>
> +       /* Apply format and crop settings */
> +       ret = imx214_set_framefmt(imx214, state);
> +       if (ret) {
> +               dev_err(imx214->dev, "%s failed to set frame format: %d\n",
> +                       __func__, ret);
> +               return ret;
> +       }
> +
>         mode = v4l2_find_nearest_size(imx214_modes,
>                                 ARRAY_SIZE(imx214_modes), width, height,
>                                 imx214->fmt.width, imx214->fmt.height);
> @@ -922,7 +995,7 @@ static int imx214_s_stream(struct v4l2_subdev *subdev, int enable)
>                         return ret;
>
>                 state = v4l2_subdev_lock_and_get_active_state(subdev);
> -               ret = imx214_start_streaming(imx214);
> +               ret = imx214_start_streaming(imx214, state);
>                 v4l2_subdev_unlock_state(state);
>                 if (ret < 0)
>                         goto err_rpm_put;
>
> --
> 2.46.0
>
>
>





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