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

   1 From a3359aca41e5942a74f803ce8837ef24456db2d5 Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.com>
   3 Date: Thu, 11 Jun 2020 14:36:40 +0100
   4 Subject: [PATCH] media: i2c: imx290: Convert HMAX setting into
   5  V4L2_CID_HBLANK
   6
   7 Userspace needs to know HBLANK if it is to work out exposure times
   8 and frame rates, therefore convert it to map onto V4L2_CID_HBLANK
   9
  10 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
  11 ---
  12  drivers/media/i2c/imx290.c | 66 +++++++++++++++++++++++++-------------
  13  1 file changed, 44 insertions(+), 22 deletions(-)
  14
  15 --- a/drivers/media/i2c/imx290.c
  16 +++ b/drivers/media/i2c/imx290.c
  17 @@ -40,6 +40,9 @@ enum imx290_clk_index {
  18  #define IMX290_GAIN 0x3014
  19  #define IMX290_HMAX_LOW 0x301c
  20  #define IMX290_HMAX_HIGH 0x301d
  21 +#define IMX290_HMAX_MIN_2LANE 4400 /* Min of 4400 pixels = 30fps */
  22 +#define IMX290_HMAX_MIN_4LANE 2200 /* Min of 2200 pixels = 60fps */
  23 +#define IMX290_HMAX_MAX 0xffff
  24  #define IMX290_PGCTRL 0x308c
  25  #define IMX290_PHY_LANE_NUM 0x3407
  26  #define IMX290_CSI_LANE_MODE 0x3443
  27 @@ -82,6 +85,7 @@ struct imx290 {
  28         struct regmap *regmap;
  29         u8 nlanes;
  30         u8 bpp;
  31 +       u16 hmax_min;
  32
  33         struct v4l2_subdev sd;
  34         struct media_pad pad;
  35 @@ -94,6 +98,7 @@ struct imx290 {
  36         struct v4l2_ctrl_handler ctrls;
  37         struct v4l2_ctrl *link_freq;
  38         struct v4l2_ctrl *pixel_rate;
  39 +       struct v4l2_ctrl *hblank;
  40
  41         struct mutex lock;
  42  };
  43 @@ -518,6 +523,26 @@ static int imx290_set_gain(struct imx290
  44         return ret;
  45  }
  46
  47 +static int imx290_set_hmax(struct imx290 *imx290, u32 val)
  48 +{
  49 +       u32 hmax = val + imx290->current_mode->width;
  50 +       int ret;
  51 +
  52 +       ret = imx290_write_reg(imx290, IMX290_HMAX_LOW, (hmax & 0xff));
  53 +       if (ret) {
  54 +               dev_err(imx290->dev, "Error setting HMAX register\n");
  55 +               return ret;
  56 +       }
  57 +
  58 +       ret = imx290_write_reg(imx290, IMX290_HMAX_HIGH, ((hmax >> 8) & 0xff));
  59 +       if (ret) {
  60 +               dev_err(imx290->dev, "Error setting HMAX register\n");
  61 +               return ret;
  62 +       }
  63 +
  64 +       return 0;
  65 +}
  66 +
  67  /* Stop streaming */
  68  static int imx290_stop_streaming(struct imx290 *imx290)
  69  {
  70 @@ -546,6 +571,9 @@ static int imx290_set_ctrl(struct v4l2_c
  71         case V4L2_CID_GAIN:
  72                 ret = imx290_set_gain(imx290, ctrl->val);
  73                 break;
  74 +       case V4L2_CID_HBLANK:
  75 +               ret = imx290_set_hmax(imx290, ctrl->val);
  76 +               break;
  77         case V4L2_CID_TEST_PATTERN:
  78                 if (ctrl->val) {
  79                         imx290_write_reg(imx290, IMX290_BLKLEVEL_LOW, 0x00);
  80 @@ -702,6 +730,12 @@ static int imx290_set_fmt(struct v4l2_su
  81                 if (imx290->pixel_rate)
  82                         __v4l2_ctrl_s_ctrl_int64(imx290->pixel_rate,
  83                                                  imx290_calc_pixel_rate(imx290));
  84 +
  85 +               if (imx290->hblank)
  86 +                       __v4l2_ctrl_modify_range(imx290->hblank,
  87 +                                                imx290->hmax_min - mode->width,
  88 +                                                IMX290_HMAX_MAX - mode->width,
  89 +                                                1, mode->hmax - mode->width);
  90         }
  91
  92         *format = fmt->format;
  93 @@ -756,25 +790,6 @@ static int imx290_write_current_format(s
  94         return 0;
  95  }
  96
  97 -static int imx290_set_hmax(struct imx290 *imx290, u32 val)
  98 -{
  99 -       int ret;
 100 -
 101 -       ret = imx290_write_reg(imx290, IMX290_HMAX_LOW, (val & 0xff));
 102 -       if (ret) {
 103 -               dev_err(imx290->dev, "Error setting HMAX register\n");
 104 -               return ret;
 105 -       }
 106 -
 107 -       ret = imx290_write_reg(imx290, IMX290_HMAX_HIGH, ((val >> 8) & 0xff));
 108 -       if (ret) {
 109 -               dev_err(imx290->dev, "Error setting HMAX register\n");
 110 -               return ret;
 111 -       }
 112 -
 113 -       return 0;
 114 -}
 115 -
 116  /* Start streaming */
 117  static int imx290_start_streaming(struct imx290 *imx290)
 118  {
 119 @@ -813,9 +828,6 @@ static int imx290_start_streaming(struct
 120                 dev_err(imx290->dev, "Could not set current mode\n");
 121                 return ret;
 122         }
 123 -       ret = imx290_set_hmax(imx290, imx290->current_mode->hmax);
 124 -       if (ret < 0)
 125 -               return ret;
 126
 127         /* Apply customized values from user */
 128         ret = v4l2_ctrl_handler_setup(imx290->sd.ctrl_handler);
 129 @@ -1014,6 +1026,7 @@ static int imx290_probe(struct i2c_clien
 130         struct v4l2_fwnode_endpoint ep = {
 131                 .bus_type = V4L2_MBUS_CSI2_DPHY
 132         };
 133 +       const struct imx290_mode *mode;
 134         struct imx290 *imx290;
 135         s64 fq;
 136         int ret;
 137 @@ -1052,6 +1065,8 @@ static int imx290_probe(struct i2c_clien
 138                 ret = -EINVAL;
 139                 goto free_err;
 140         }
 141 +       imx290->hmax_min = (imx290->nlanes == 2) ? IMX290_HMAX_MIN_2LANE :
 142 +                                                IMX290_HMAX_MIN_4LANE;
 143
 144         dev_dbg(dev, "Using %u data lanes\n", imx290->nlanes);
 145
 146 @@ -1126,6 +1141,13 @@ static int imx290_probe(struct i2c_clien
 147         v4l2_ctrl_new_std(&imx290->ctrls, &imx290_ctrl_ops,
 148                           V4L2_CID_GAIN, 0, 238, 1, 0);
 149
 150 +       mode = imx290->current_mode;
 151 +       imx290->hblank = v4l2_ctrl_new_std(&imx290->ctrls, &imx290_ctrl_ops,
 152 +                                          V4L2_CID_HBLANK,
 153 +                                          imx290->hmax_min - mode->width,
 154 +                                          IMX290_HMAX_MAX - mode->width, 1,
 155 +                                          mode->hmax - mode->width);
 156 +
 157         imx290->link_freq =
 158                 v4l2_ctrl_new_int_menu(&imx290->ctrls, &imx290_ctrl_ops,
 159                                        V4L2_CID_LINK_FREQ,