V4L/DVB (13662): mt9t031: make the use of the soc-camera client API optional

Now that we have moved most of the functions over to the v4l2-subdev API, only
quering and setting bus parameters are still performed using the legacy
soc-camera client API. Make the use of this API optional for mt9t031.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 85 insertions, 82 deletions

diff --git a/drivers/media/video/mt9t031.c b/drivers/media/video/mt9t031.c
index 69c227f65bcb..a9061bff79b2 100644
--- a/drivers/media/video/mt9t031.c
+++ b/drivers/media/video/mt9t031.c
@@ -201,6 +201,71 @@ static unsigned long mt9t031_query_bus_param(struct soc_camera_device *icd)
         return soc_camera_apply_sensor_flags(icl, MT9T031_BUS_PARAM);
 }
 
+enum {
+        MT9T031_CTRL_VFLIP,
+        MT9T031_CTRL_HFLIP,
+        MT9T031_CTRL_GAIN,
+        MT9T031_CTRL_EXPOSURE,
+        MT9T031_CTRL_EXPOSURE_AUTO,
+};
+
+static const struct v4l2_queryctrl mt9t031_controls[] = {
+        [MT9T031_CTRL_VFLIP] = {
+                .id             = V4L2_CID_VFLIP,
+                .type           = V4L2_CTRL_TYPE_BOOLEAN,
+                .name           = "Flip Vertically",
+                .minimum        = 0,
+                .maximum        = 1,
+                .step           = 1,
+                .default_value  = 0,
+        },
+        [MT9T031_CTRL_HFLIP] = {
+                .id             = V4L2_CID_HFLIP,
+                .type           = V4L2_CTRL_TYPE_BOOLEAN,
+                .name           = "Flip Horizontally",
+                .minimum        = 0,
+                .maximum        = 1,
+                .step           = 1,
+                .default_value  = 0,
+        },
+        [MT9T031_CTRL_GAIN] = {
+                .id             = V4L2_CID_GAIN,
+                .type           = V4L2_CTRL_TYPE_INTEGER,
+                .name           = "Gain",
+                .minimum        = 0,
+                .maximum        = 127,
+                .step           = 1,
+                .default_value  = 64,
+                .flags          = V4L2_CTRL_FLAG_SLIDER,
+        },
+        [MT9T031_CTRL_EXPOSURE] = {
+                .id             = V4L2_CID_EXPOSURE,
+                .type           = V4L2_CTRL_TYPE_INTEGER,
+                .name           = "Exposure",
+                .minimum        = 1,
+                .maximum        = 255,
+                .step           = 1,
+                .default_value  = 255,
+                .flags          = V4L2_CTRL_FLAG_SLIDER,
+        },
+        [MT9T031_CTRL_EXPOSURE_AUTO] = {
+                .id             = V4L2_CID_EXPOSURE_AUTO,
+                .type           = V4L2_CTRL_TYPE_BOOLEAN,
+                .name           = "Automatic Exposure",
+                .minimum        = 0,
+                .maximum        = 1,
+                .step           = 1,
+                .default_value  = 1,
+        }
+};
+
+static struct soc_camera_ops mt9t031_ops = {
+        .set_bus_param          = mt9t031_set_bus_param,
+        .query_bus_param        = mt9t031_query_bus_param,
+        .controls               = mt9t031_controls,
+        .num_controls           = ARRAY_SIZE(mt9t031_controls),
+};
+
 /* target must be _even_ */
 static u16 mt9t031_skip(s32 *source, s32 target, s32 max)
 {
@@ -220,10 +285,9 @@ static u16 mt9t031_skip(s32 *source, s32 target, s32 max)
 }
 
 /* rect is the sensor rectangle, the caller guarantees parameter validity */
-static int mt9t031_set_params(struct soc_camera_device *icd,
+static int mt9t031_set_params(struct i2c_client *client,
                               struct v4l2_rect *rect, u16 xskip, u16 yskip)
 {
-        struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
         struct mt9t031 *mt9t031 = to_mt9t031(client);
         int ret;
         u16 xbin, ybin;
@@ -304,8 +368,7 @@ static int mt9t031_set_params(struct soc_camera_device *icd,
                 if (ret >= 0) {
                         const u32 shutter_max = MT9T031_MAX_HEIGHT + vblank;
                         const struct v4l2_queryctrl *qctrl =
-                                soc_camera_find_qctrl(icd->ops,
-                                                      V4L2_CID_EXPOSURE);
+                                &mt9t031_controls[MT9T031_CTRL_EXPOSURE];
                         mt9t031->exposure = (shutter_max / 2 + (total_h - 1) *
                                  (qctrl->maximum - qctrl->minimum)) /
                                 shutter_max + qctrl->minimum;
@@ -330,7 +393,6 @@ static int mt9t031_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
         struct v4l2_rect rect = a->c;
         struct i2c_client *client = sd->priv;
         struct mt9t031 *mt9t031 = to_mt9t031(client);
-        struct soc_camera_device *icd = client->dev.platform_data;
 
         rect.width = ALIGN(rect.width, 2);
         rect.height = ALIGN(rect.height, 2);
@@ -341,7 +403,7 @@ static int mt9t031_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
         soc_camera_limit_side(&rect.top, &rect.height,
                      MT9T031_ROW_SKIP, MT9T031_MIN_HEIGHT, MT9T031_MAX_HEIGHT);
 
-        return mt9t031_set_params(icd, &rect, mt9t031->xskip, mt9t031->yskip);
+        return mt9t031_set_params(client, &rect, mt9t031->xskip, mt9t031->yskip);
 }
 
 static int mt9t031_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
@@ -389,7 +451,6 @@ static int mt9t031_s_fmt(struct v4l2_subdev *sd,
 {
         struct i2c_client *client = sd->priv;
         struct mt9t031 *mt9t031 = to_mt9t031(client);
-        struct soc_camera_device *icd = client->dev.platform_data;
         u16 xskip, yskip;
         struct v4l2_rect rect = mt9t031->rect;
 
@@ -404,7 +465,7 @@ static int mt9t031_s_fmt(struct v4l2_subdev *sd,
         mf->colorspace  = V4L2_COLORSPACE_SRGB;
 
         /* mt9t031_set_params() doesn't change width and height */
-        return mt9t031_set_params(icd, &rect, xskip, yskip);
+        return mt9t031_set_params(client, &rect, xskip, yskip);
 }
 
 /*
@@ -480,59 +541,6 @@ static int mt9t031_s_register(struct v4l2_subdev *sd,
 }
 #endif
 
-static const struct v4l2_queryctrl mt9t031_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_GAIN,
-                .type           = V4L2_CTRL_TYPE_INTEGER,
-                .name           = "Gain",
-                .minimum        = 0,
-                .maximum        = 127,
-                .step           = 1,
-                .default_value  = 64,
-                .flags          = V4L2_CTRL_FLAG_SLIDER,
-        }, {
-                .id             = V4L2_CID_EXPOSURE,
-                .type           = V4L2_CTRL_TYPE_INTEGER,
-                .name           = "Exposure",
-                .minimum        = 1,
-                .maximum        = 255,
-                .step           = 1,
-                .default_value  = 255,
-                .flags          = V4L2_CTRL_FLAG_SLIDER,
-        }, {
-                .id             = V4L2_CID_EXPOSURE_AUTO,
-                .type           = V4L2_CTRL_TYPE_BOOLEAN,
-                .name           = "Automatic Exposure",
-                .minimum        = 0,
-                .maximum        = 1,
-                .step           = 1,
-                .default_value  = 1,
-        }
-};
-
-static struct soc_camera_ops mt9t031_ops = {
-        .set_bus_param          = mt9t031_set_bus_param,
-        .query_bus_param        = mt9t031_query_bus_param,
-        .controls               = mt9t031_controls,
-        .num_controls           = ARRAY_SIZE(mt9t031_controls),
-};
-
 static int mt9t031_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 {
         struct i2c_client *client = sd->priv;
@@ -569,15 +577,9 @@ static int mt9t031_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 {
         struct i2c_client *client = sd->priv;
         struct mt9t031 *mt9t031 = to_mt9t031(client);
-        struct soc_camera_device *icd = client->dev.platform_data;
         const struct v4l2_queryctrl *qctrl;
         int data;
 
-        qctrl = soc_camera_find_qctrl(&mt9t031_ops, ctrl->id);
-
-        if (!qctrl)
-                return -EINVAL;
-
         switch (ctrl->id) {
         case V4L2_CID_VFLIP:
                 if (ctrl->value)
@@ -596,6 +598,7 @@ static int mt9t031_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
                         return -EIO;
                 break;
         case V4L2_CID_GAIN:
+                qctrl = &mt9t031_controls[MT9T031_CTRL_GAIN];
                 if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
                         return -EINVAL;
                 /* See Datasheet Table 7, Gain settings. */
@@ -635,6 +638,7 @@ static int mt9t031_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
                 mt9t031->gain = ctrl->value;
                 break;
         case V4L2_CID_EXPOSURE:
+                qctrl = &mt9t031_controls[MT9T031_CTRL_EXPOSURE];
                 /* mt9t031 has maximum == default */
                 if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
                         return -EINVAL;
@@ -662,7 +666,7 @@ static int mt9t031_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 
                         if (set_shutter(client, total_h) < 0)
                                 return -EIO;
-                        qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_EXPOSURE);
+                        qctrl = &mt9t031_controls[MT9T031_CTRL_EXPOSURE];
                         mt9t031->exposure = (shutter_max / 2 + (total_h - 1) *
                                  (qctrl->maximum - qctrl->minimum)) /
                                 shutter_max + qctrl->minimum;
@@ -670,6 +674,8 @@ static int mt9t031_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
                 } else
                         mt9t031->autoexposure = 0;
                 break;
+        default:
+                return -EINVAL;
         }
         return 0;
 }
@@ -771,18 +777,16 @@ static int mt9t031_probe(struct i2c_client *client,
         struct mt9t031 *mt9t031;
         struct soc_camera_device *icd = client->dev.platform_data;
         struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
-        struct soc_camera_link *icl;
         int ret;
 
-        if (!icd) {
-                dev_err(&client->dev, "MT9T031: missing soc-camera data!\n");
-                return -EINVAL;
-        }
+        if (icd) {
+                struct soc_camera_link *icl = to_soc_camera_link(icd);
+                if (!icl) {
+                        dev_err(&client->dev, "MT9T031 driver needs platform data\n");
+                        return -EINVAL;
+                }
 
-        icl = to_soc_camera_link(icd);
-        if (!icl) {
-                dev_err(&client->dev, "MT9T031 driver needs platform data\n");
-                return -EINVAL;
+                icd->ops = &mt9t031_ops;
         }
 
         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
@@ -797,9 +801,6 @@ static int mt9t031_probe(struct i2c_client *client,
 
         v4l2_i2c_subdev_init(&mt9t031->subdev, client, &mt9t031_subdev_ops);
 
-        /* Second stage probe - when a capture adapter is there */
-        icd->ops                = &mt9t031_ops;
-
         mt9t031->y_skip_top     = 0;
         mt9t031->rect.left      = MT9T031_COLUMN_SKIP;
         mt9t031->rect.top       = MT9T031_ROW_SKIP;
@@ -822,7 +823,8 @@ static int mt9t031_probe(struct i2c_client *client,
         mt9t031_disable(client);
 
         if (ret) {
-                icd->ops = NULL;
+                if (icd)
+                        icd->ops = NULL;
                 i2c_set_clientdata(client, NULL);
                 kfree(mt9t031);
         }
@@ -835,7 +837,8 @@ static int mt9t031_remove(struct i2c_client *client)
         struct mt9t031 *mt9t031 = to_mt9t031(client);
         struct soc_camera_device *icd = client->dev.platform_data;
 
-        icd->ops = NULL;
+        if (icd)
+                icd->ops = NULL;
         i2c_set_clientdata(client, NULL);
         client->driver = NULL;
         kfree(mt9t031);