git.openwrt.org Git - openwrt/staging/stintel.git/blob

   1 From d3cbabced959831fb1f04565dd424ece48f1b831 Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.com>
   3 Date: Thu, 31 Mar 2022 15:33:59 +0100
   4 Subject: [PATCH] media: i2c: imx258: Allow configuration of clock lane
   5  behaviour
   6
   7 The sensor supports the clock lane either remaining in HS mode
   8 during frame blanking, or dropping to LP11.
   9
  10 Add configuration of the mode via V4L2_MBUS_CSI2_CONTINUOUS_CLOCK.
  11
  12 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
  13 ---
  14  drivers/media/i2c/imx258.c | 14 ++++++++++++++
  15  1 file changed, 14 insertions(+)
  16
  17 --- a/drivers/media/i2c/imx258.c
  18 +++ b/drivers/media/i2c/imx258.c
  19 @@ -72,6 +72,8 @@
  20  /* Test Pattern Control */
  21  #define IMX258_REG_TEST_PATTERN                0x0600
  22
  23 +#define IMX258_CLK_BLANK_STOP          0x4040
  24 +
  25  /* Orientation */
  26  #define REG_MIRROR_FLIP_CONTROL                0x0101
  27  #define REG_CONFIG_MIRROR_HFLIP                0x01
  28 @@ -848,6 +850,7 @@ struct imx258 {
  29         const struct imx258_link_freq_config *link_freq_configs;
  30         const s64 *link_freq_menu_items;
  31         unsigned int nlanes;
  32 +       unsigned int csi2_flags;
  33
  34         /*
  35          * Mutex for serialized access:
  36 @@ -1300,6 +1303,15 @@ static int imx258_start_streaming(struct
  37                 return ret;
  38         }
  39
  40 +       ret = imx258_write_reg(imx258, IMX258_CLK_BLANK_STOP,
  41 +                              IMX258_REG_VALUE_08BIT,
  42 +                              imx258->csi2_flags & V4L2_MBUS_CSI2_CONTINUOUS_CLOCK ?
  43 +                              0 : 1);
  44 +       if (ret) {
  45 +               dev_err(&client->dev, "%s failed to set clock lane mode\n", __func__);
  46 +               return ret;
  47 +       }
  48 +
  49         /* Apply default values of current mode */
  50         reg_list = &imx258->cur_mode->reg_list;
  51         ret = imx258_write_regs(imx258, reg_list->regs, reg_list->num_of_regs);
  52 @@ -1703,6 +1715,8 @@ static int imx258_probe(struct i2c_clien
  53                 goto error_endpoint_poweron;
  54         }
  55
  56 +       imx258->csi2_flags = ep.bus.mipi_csi2.flags;
  57 +
  58         /* Initialize subdev */
  59         v4l2_i2c_subdev_init(&imx258->sd, client, &imx258_subdev_ops);
  60