[media] ov772x: convert to the control framework

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
[g.liakhovetski@gmx.de: simplified pointer arithmetic]
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/video/ov772x.c b/drivers/media/video/ov772x.c
index f77e8995fe40e78f419d53eb276937a914de9c78..9b540421e2cb6c7e8370201db2b36c0ace33d916 100644 (file)
--- a/drivers/media/video/ov772x.c
+++ b/drivers/media/video/ov772x.c
@@ -25,6 +25,7 @@
 #include <media/ov772x.h>
 #include <media/soc_camera.h>
 #include <media/soc_mediabus.h>
+#include <media/v4l2-ctrls.h>
 #include <media/v4l2-chip-ident.h>
 #include <media/v4l2-subdev.h>
 
@@ -401,6 +402,7 @@ struct ov772x_win_size {
 
 struct ov772x_priv {
        struct v4l2_subdev                subdev;
+       struct v4l2_ctrl_handler          hdl;
        struct ov772x_camera_info        *info;
        const struct ov772x_color_format *cfmt;
        const struct ov772x_win_size     *win;
@@ -518,36 +520,6 @@ static const struct ov772x_win_size ov772x_win_qvga = {
        .regs     = ov772x_qvga_regs,
 };
 
-static const struct v4l2_queryctrl ov772x_controls[] = {
-       {
-               .id             = V4L2_CID_VFLIP,
-               .type           = V4L2_CTRL_TYPE_BOOLEAN,
-               .name           = "Flip Vertically",
-               .minimum        = 0,
-               .maximum        = 1,
-               .step           = 1,
-               .default_value  = 0,
-       },
-       {
-               .id             = V4L2_CID_HFLIP,
-               .type           = V4L2_CTRL_TYPE_BOOLEAN,
-               .name           = "Flip Horizontally",
-               .minimum        = 0,
-               .maximum        = 1,
-               .step           = 1,
-               .default_value  = 0,
-       },
-       {
-               .id             = V4L2_CID_BAND_STOP_FILTER,
-               .type           = V4L2_CTRL_TYPE_INTEGER,
-               .name           = "Band-stop filter",
-               .minimum        = 0,
-               .maximum        = 256,
-               .step           = 1,
-               .default_value  = 0,
-       },
-};
-
 /*
  * general function
  */
@@ -621,52 +593,30 @@ static int ov772x_s_stream(struct v4l2_subdev *sd, int enable)
        return 0;
 }
 
-static int ov772x_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
-{
-       struct ov772x_priv *priv = container_of(sd, struct ov772x_priv, subdev);
-
-       switch (ctrl->id) {
-       case V4L2_CID_VFLIP:
-               ctrl->value = priv->flag_vflip;
-               break;
-       case V4L2_CID_HFLIP:
-               ctrl->value = priv->flag_hflip;
-               break;
-       case V4L2_CID_BAND_STOP_FILTER:
-               ctrl->value = priv->band_filter;
-               break;
-       }
-       return 0;
-}
-
-static int ov772x_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
+static int ov772x_s_ctrl(struct v4l2_ctrl *ctrl)
 {
+       struct ov772x_priv *priv = container_of(ctrl->handler,
+                                               struct ov772x_priv, hdl);
+       struct v4l2_subdev *sd = &priv->subdev;
        struct i2c_client *client = v4l2_get_subdevdata(sd);
-       struct ov772x_priv *priv = container_of(sd, struct ov772x_priv, subdev);
        int ret = 0;
        u8 val;
 
        switch (ctrl->id) {
        case V4L2_CID_VFLIP:
-               val = ctrl->value ? VFLIP_IMG : 0x00;
-               priv->flag_vflip = ctrl->value;
+               val = ctrl->val ? VFLIP_IMG : 0x00;
+               priv->flag_vflip = ctrl->val;
                if (priv->info->flags & OV772X_FLAG_VFLIP)
                        val ^= VFLIP_IMG;
-               ret = ov772x_mask_set(client, COM3, VFLIP_IMG, val);
-               break;
+               return ov772x_mask_set(client, COM3, VFLIP_IMG, val);
        case V4L2_CID_HFLIP:
-               val = ctrl->value ? HFLIP_IMG : 0x00;
-               priv->flag_hflip = ctrl->value;
+               val = ctrl->val ? HFLIP_IMG : 0x00;
+               priv->flag_hflip = ctrl->val;
                if (priv->info->flags & OV772X_FLAG_HFLIP)
                        val ^= HFLIP_IMG;
-               ret = ov772x_mask_set(client, COM3, HFLIP_IMG, val);
-               break;
+               return ov772x_mask_set(client, COM3, HFLIP_IMG, val);
        case V4L2_CID_BAND_STOP_FILTER:
-               if ((unsigned)ctrl->value > 256)
-                       ctrl->value = 256;
-               if (ctrl->value == priv->band_filter)
-                       break;
-               if (!ctrl->value) {
+               if (!ctrl->val) {
                        /* Switch the filter off, it is on now */
                        ret = ov772x_mask_set(client, BDBASE, 0xff, 0xff);
                        if (!ret)
@@ -674,7 +624,7 @@ static int ov772x_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
                                                      BNDF_ON_OFF, 0);
                } else {
                        /* Switch the filter on, set AEC low limit */
-                       val = 256 - ctrl->value;
+                       val = 256 - ctrl->val;
                        ret = ov772x_mask_set(client, COM8,
                                              BNDF_ON_OFF, BNDF_ON_OFF);
                        if (!ret)
@@ -682,11 +632,11 @@ static int ov772x_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
                                                      0xff, val);
                }
                if (!ret)
-                       priv->band_filter = ctrl->value;
-               break;
+                       priv->band_filter = ctrl->val;
+               return ret;
        }
 
-       return ret;
+       return -EINVAL;
 }
 
 static int ov772x_g_chip_ident(struct v4l2_subdev *sd,
@@ -1042,18 +992,14 @@ static int ov772x_video_probe(struct soc_camera_device *icd,
                 ver,
                 i2c_smbus_read_byte_data(client, MIDH),
                 i2c_smbus_read_byte_data(client, MIDL));
-
-       return 0;
+       return v4l2_ctrl_handler_setup(&priv->hdl);
 }
 
-static struct soc_camera_ops ov772x_ops = {
-       .controls               = ov772x_controls,
-       .num_controls           = ARRAY_SIZE(ov772x_controls),
+static const struct v4l2_ctrl_ops ov772x_ctrl_ops = {
+       .s_ctrl = ov772x_s_ctrl,
 };
 
 static struct v4l2_subdev_core_ops ov772x_subdev_core_ops = {
-       .g_ctrl         = ov772x_g_ctrl,
-       .s_ctrl         = ov772x_s_ctrl,
        .g_chip_ident   = ov772x_g_chip_ident,
 #ifdef CONFIG_VIDEO_ADV_DEBUG
        .g_register     = ov772x_g_register,
@@ -1139,12 +1085,24 @@ static int ov772x_probe(struct i2c_client *client,
        priv->info = icl->priv;
 
        v4l2_i2c_subdev_init(&priv->subdev, client, &ov772x_subdev_ops);
+       v4l2_ctrl_handler_init(&priv->hdl, 3);
+       v4l2_ctrl_new_std(&priv->hdl, &ov772x_ctrl_ops,
+                       V4L2_CID_VFLIP, 0, 1, 1, 0);
+       v4l2_ctrl_new_std(&priv->hdl, &ov772x_ctrl_ops,
+                       V4L2_CID_HFLIP, 0, 1, 1, 0);
+       v4l2_ctrl_new_std(&priv->hdl, &ov772x_ctrl_ops,
+                       V4L2_CID_BAND_STOP_FILTER, 0, 256, 1, 0);
+       priv->subdev.ctrl_handler = &priv->hdl;
+       if (priv->hdl.error) {
+               int err = priv->hdl.error;
 
-       icd->ops                = &ov772x_ops;
+               kfree(priv);
+               return err;
+       }
 
        ret = ov772x_video_probe(icd, client);
        if (ret) {
-               icd->ops = NULL;
+               v4l2_ctrl_handler_free(&priv->hdl);
                kfree(priv);
        }
 
@@ -1154,9 +1112,9 @@ static int ov772x_probe(struct i2c_client *client,
 static int ov772x_remove(struct i2c_client *client)
 {
        struct ov772x_priv *priv = to_ov772x(client);
-       struct soc_camera_device *icd = client->dev.platform_data;
 
-       icd->ops = NULL;
+       v4l2_device_unregister_subdev(&priv->subdev);
+       v4l2_ctrl_handler_free(&priv->hdl);
        kfree(priv);
        return 0;
 }