target/linux/bcm27xx/patches-5.15/950-0824-media-i2c-imx258-Issue-reset-before-starting-streami.patch

   1 From 4207b34a5b5831d5fea177a1a005eec692cc3722 Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.com>
   3 Date: Thu, 31 Mar 2022 17:12:12 +0100
   4 Subject: [PATCH] media: i2c: imx258: Issue reset before starting
   5  streaming
   6
   7 Whilst not documented, register 0x0103 bit 0 is the soft
   8 reset for the sensor, so send it before trying to configure
   9 the sensor.
  10
  11 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
  12 ---
  13  drivers/media/i2c/imx258.c | 10 ++++++++++
  14  1 file changed, 10 insertions(+)
  15
  16 --- a/drivers/media/i2c/imx258.c
  17 +++ b/drivers/media/i2c/imx258.c
  18 @@ -20,6 +20,8 @@
  19  #define IMX258_MODE_STANDBY            0x00
  20  #define IMX258_MODE_STREAMING          0x01
  21
  22 +#define IMX258_REG_RESET               0x0103
  23 +
  24  /* Chip ID */
  25  #define IMX258_REG_CHIP_ID             0x0016
  26  #define IMX258_CHIP_ID                 0x0258
  27 @@ -1319,6 +1321,14 @@ static int imx258_start_streaming(struct
  28         const struct imx258_link_freq_config *link_freq_cfg;
  29         int ret, link_freq_index;
  30
  31 +       ret = imx258_write_reg(imx258, IMX258_REG_RESET, IMX258_REG_VALUE_08BIT,
  32 +                              0x01);
  33 +       if (ret) {
  34 +               dev_err(&client->dev, "%s failed to reset sensor\n", __func__);
  35 +               return ret;
  36 +       }
  37 +       usleep_range(10000, 15000);
  38 +
  39         /* Setup PLL */
  40         link_freq_index = imx258->cur_mode->link_freq_index;
  41         link_freq_cfg = &imx258->link_freq_configs[link_freq_index];