target/linux/bcm27xx/patches-5.15/950-0346-media-i2c-imx290-Fix-up-exposure-calcuations-and-ran.patch

   1 From b6117da06f6d72d847985e5f179db62beb0227ca Mon Sep 17 00:00:00 2001
   2 From: David Plowman <david.plowman@raspberrypi.com>
   3 Date: Wed, 17 Feb 2021 18:08:12 +0000
   4 Subject: [PATCH] media: i2c: imx290: Fix up exposure calcuations and
   5  ranges
   6
   7 Should now correspond exactly to the datasheet.
   8
   9 Signed-off-by: David Plowman <david.plowman@raspberrypi.com>
  10 ---
  11  drivers/media/i2c/imx290.c | 14 +++++++-------
  12  1 file changed, 7 insertions(+), 7 deletions(-)
  13
  14 --- a/drivers/media/i2c/imx290.c
  15 +++ b/drivers/media/i2c/imx290.c
  16 @@ -50,7 +50,7 @@ enum imx290_clk_index {
  17  #define IMX290_HMAX_MIN_4LANE 2200 /* Min of 2200 pixels = 60fps */
  18  #define IMX290_HMAX_MAX 0xffff
  19
  20 -#define IMX290_EXPOSURE_MIN 2
  21 +#define IMX290_EXPOSURE_MIN 1
  22  #define IMX290_EXPOSURE_STEP 1
  23  #define IMX290_EXPOSURE_LOW 0x3020
  24  #define IMX290_PGCTRL 0x308c
  25 @@ -584,7 +584,7 @@ static int imx290_set_gain(struct imx290
  26  static int imx290_set_exposure(struct imx290 *imx290, u32 value)
  27  {
  28         u32 exposure = (imx290->current_mode->height + imx290->vblank->val) -
  29 -                                               value;
  30 +                                               value - 1;
  31         int ret;
  32
  33         ret = imx290_write_buffered_reg(imx290, IMX290_EXPOSURE_LOW, 3,
  34 @@ -855,10 +855,10 @@ static int imx290_set_fmt(struct v4l2_su
  35                 }
  36                 if (imx290->exposure)
  37                         __v4l2_ctrl_modify_range(imx290->exposure,
  38 -                                                mode->vmax - mode->height,
  39 -                                                mode->vmax - 4,
  40 +                                                IMX290_EXPOSURE_MIN,
  41 +                                                mode->vmax - 2,
  42                                                  IMX290_EXPOSURE_STEP,
  43 -                                                mode->vmax - 4);
  44 +                                                mode->vmax - 2);
  45         }
  46
  47         *format = fmt->format;
  48 @@ -1345,9 +1345,9 @@ static int imx290_probe(struct i2c_clien
  49         imx290->exposure = v4l2_ctrl_new_std(&imx290->ctrls, &imx290_ctrl_ops,
  50                                              V4L2_CID_EXPOSURE,
  51                                              IMX290_EXPOSURE_MIN,
  52 -                                            mode->vmax - 4,
  53 +                                            mode->vmax - 2,
  54                                              IMX290_EXPOSURE_STEP,
  55 -                                            mode->vmax - 4);
  56 +                                            mode->vmax - 2);
  57
  58         imx290->hflip = v4l2_ctrl_new_std(&imx290->ctrls, &imx290_ctrl_ops,
  59                                           V4L2_CID_HFLIP, 0, 1, 1, 0);