V4L/DVB (12514): sh_mobile_ceu_camera: add a control for the camera low-pass filter

Use the V4L2_CID_SHARPNESS control to switch SH-mobile camera low-pass filter.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/sh_mobile_ceu_camera.c

@@ -496,7 +496,6 @@ static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
 	ceu_write(pcdev, CAPWR, (height << 16) | width);
 	ceu_write(pcdev, CFLCR, 0); /* no scaling */
 	ceu_write(pcdev, CFSZR, (height << 16) | cfszr_width);
-	ceu_write(pcdev, CLFCR, 0); /* no lowpass filter */
 
 	/* A few words about byte order (observed in Big Endian mode)
 	 *
@@ -773,6 +772,55 @@ static void sh_mobile_ceu_init_videobuf(struct videobuf_queue *q,
 				       icd);
 }
 
+static int sh_mobile_ceu_get_ctrl(struct soc_camera_device *icd,
+				  struct v4l2_control *ctrl)
+{
+	struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
+	struct sh_mobile_ceu_dev *pcdev = ici->priv;
+	u32 val;
+
+	switch (ctrl->id) {
+	case V4L2_CID_SHARPNESS:
+		val = ceu_read(pcdev, CLFCR);
+		ctrl->value = val ^ 1;
+		return 0;
+	}
+	return -ENOIOCTLCMD;
+}
+
+static int sh_mobile_ceu_set_ctrl(struct soc_camera_device *icd,
+				  struct v4l2_control *ctrl)
+{
+	struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
+	struct sh_mobile_ceu_dev *pcdev = ici->priv;
+
+	switch (ctrl->id) {
+	case V4L2_CID_SHARPNESS:
+		switch (icd->current_fmt->fourcc) {
+		case V4L2_PIX_FMT_NV12:
+		case V4L2_PIX_FMT_NV21:
+		case V4L2_PIX_FMT_NV16:
+		case V4L2_PIX_FMT_NV61:
+			ceu_write(pcdev, CLFCR, !ctrl->value);
+			return 0;
+		}
+		return -EINVAL;
+	}
+	return -ENOIOCTLCMD;
+}
+
+static const struct v4l2_queryctrl sh_mobile_ceu_controls[] = {
+	{
+		.id		= V4L2_CID_SHARPNESS,
+		.type		= V4L2_CTRL_TYPE_BOOLEAN,
+		.name		= "Low-pass filter",
+		.minimum	= 0,
+		.maximum	= 1,
+		.step		= 1,
+		.default_value	= 0,
+	},
+};
+
 static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
 	.owner		= THIS_MODULE,
 	.add		= sh_mobile_ceu_add_device,
@@ -781,11 +829,15 @@ static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
 	.set_crop	= sh_mobile_ceu_set_crop,
 	.set_fmt	= sh_mobile_ceu_set_fmt,
 	.try_fmt	= sh_mobile_ceu_try_fmt,
+	.set_ctrl	= sh_mobile_ceu_set_ctrl,
+	.get_ctrl	= sh_mobile_ceu_get_ctrl,
 	.reqbufs	= sh_mobile_ceu_reqbufs,
 	.poll		= sh_mobile_ceu_poll,
 	.querycap	= sh_mobile_ceu_querycap,
 	.set_bus_param	= sh_mobile_ceu_set_bus_param,
 	.init_videobuf	= sh_mobile_ceu_init_videobuf,
+	.controls	= sh_mobile_ceu_controls,
+	.num_controls	= ARRAY_SIZE(sh_mobile_ceu_controls),
 };
 
 static int __devinit sh_mobile_ceu_probe(struct platform_device *pdev)