[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>

1 files changed, 36 insertions, 78 deletions

diff --git a/drivers/media/video/ov772x.c b/drivers/media/video/ov772x.c
index f77e8995fe40..9b540421e2cb 100644
--- 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;
 }