target/linux/bcm27xx/patches-5.15/950-0469-media-i2c-imx477-Allow-control-of-on-sensor-DPC.patch

   1 From 2b6edd13bb5152c659466987846b481df8b37393 Mon Sep 17 00:00:00 2001
   2 From: David Plowman <david.plowman@raspberrypi.com>
   3 Date: Wed, 8 Sep 2021 14:15:17 +0100
   4 Subject: [PATCH] media: i2c: imx477: Allow control of on-sensor DPC
   5
   6 A module parameter "dpc_enable" is added to allow the control of the
   7 sensor's on-board DPC (Defective Pixel Correction) function.
   8
   9 This is a global setting to be configured before using the sensor;
  10 there is no intention that this would ever be changed on-the-fly.
  11
  12 Signed-off-by: David Plowman <david.plowman@raspberrypi.com>
  13 ---
  14  drivers/media/i2c/imx477.c | 8 ++++++++
  15  1 file changed, 8 insertions(+)
  16
  17 --- a/drivers/media/i2c/imx477.c
  18 +++ b/drivers/media/i2c/imx477.c
  19 @@ -21,6 +21,10 @@
  20  #include <media/v4l2-fwnode.h>
  21  #include <media/v4l2-mediabus.h>
  22
  23 +static int dpc_enable = 1;
  24 +module_param(dpc_enable, int, 0644);
  25 +MODULE_PARM_DESC(dpc_enable, "Enable on-sensor DPC");
  26 +
  27  #define IMX477_REG_VALUE_08BIT         1
  28  #define IMX477_REG_VALUE_16BIT         2
  29
  30 @@ -1713,6 +1717,10 @@ static int imx477_start_streaming(struct
  31                 return ret;
  32         }
  33
  34 +       /* Set on-sensor DPC. */
  35 +       imx477_write_reg(imx477, 0x0b05, IMX477_REG_VALUE_08BIT, !!dpc_enable);
  36 +       imx477_write_reg(imx477, 0x0b06, IMX477_REG_VALUE_08BIT, !!dpc_enable);
  37 +
  38         /* Apply customized values from user */
  39         ret =  __v4l2_ctrl_handler_setup(imx477->sd.ctrl_handler);
  40         if (ret)