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>

1 files changed, 53 insertions, 1 deletions

diff --git a/drivers/media/video/sh_mobile_ceu_camera.c b/drivers/media/video/sh_mobile_ceu_camera.c
index 5101fa7cdb2f..16fa56efaf99 100644
--- a/drivers/media/video/sh_mobile_ceu_camera.c
+++ b/drivers/media/video/sh_mobile_ceu_camera.c
@@ -495,7 +495,6 @@ 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)
          *
@@ -772,6 +771,55 @@ 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,
@@ -780,11 +828,15 @@ 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)