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Subject: [media] rcar-vin: implement EDID control ioctls
Author:  Ulrich Hecht <ulrich.hecht+rene...@gmail.com>
Date:    Thu Sep 15 14:33:23 2016 -0300

Adds G_EDID and S_EDID.

Signed-off-by: Ulrich Hecht <ulrich.hecht+rene...@gmail.com>
Acked-by: Niklas Söderlund <niklas.soderlund+rene...@ragnatech.se>
Acked-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mche...@s-opensource.com>

 drivers/media/platform/rcar-vin/rcar-v4l2.c | 48 +++++++++++++++++++++++++++++
 drivers/media/platform/rcar-vin/rcar-vin.h  |  2 ++
 2 files changed, 50 insertions(+)

---

diff --git a/drivers/media/platform/rcar-vin/rcar-v4l2.c 
b/drivers/media/platform/rcar-vin/rcar-v4l2.c
index 61e9b59dcf44..f35005c875ad 100644
--- a/drivers/media/platform/rcar-vin/rcar-v4l2.c
+++ b/drivers/media/platform/rcar-vin/rcar-v4l2.c
@@ -613,6 +613,44 @@ static int rvin_dv_timings_cap(struct file *file, void 
*priv_fh,
        return ret;
 }
 
+static int rvin_g_edid(struct file *file, void *fh, struct v4l2_edid *edid)
+{
+       struct rvin_dev *vin = video_drvdata(file);
+       struct v4l2_subdev *sd = vin_to_source(vin);
+       int input, ret;
+
+       if (edid->pad)
+               return -EINVAL;
+
+       input = edid->pad;
+       edid->pad = vin->sink_pad_idx;
+
+       ret = v4l2_subdev_call(sd, pad, get_edid, edid);
+
+       edid->pad = input;
+
+       return ret;
+}
+
+static int rvin_s_edid(struct file *file, void *fh, struct v4l2_edid *edid)
+{
+       struct rvin_dev *vin = video_drvdata(file);
+       struct v4l2_subdev *sd = vin_to_source(vin);
+       int input, ret;
+
+       if (edid->pad)
+               return -EINVAL;
+
+       input = edid->pad;
+       edid->pad = vin->sink_pad_idx;
+
+       ret = v4l2_subdev_call(sd, pad, set_edid, edid);
+
+       edid->pad = input;
+
+       return ret;
+}
+
 static const struct v4l2_ioctl_ops rvin_ioctl_ops = {
        .vidioc_querycap                = rvin_querycap,
        .vidioc_try_fmt_vid_cap         = rvin_try_fmt_vid_cap,
@@ -635,6 +673,9 @@ static const struct v4l2_ioctl_ops rvin_ioctl_ops = {
        .vidioc_s_dv_timings            = rvin_s_dv_timings,
        .vidioc_query_dv_timings        = rvin_query_dv_timings,
 
+       .vidioc_g_edid                  = rvin_g_edid,
+       .vidioc_s_edid                  = rvin_s_edid,
+
        .vidioc_querystd                = rvin_querystd,
        .vidioc_g_std                   = rvin_g_std,
        .vidioc_s_std                   = rvin_s_std,
@@ -883,6 +924,13 @@ int rvin_v4l2_probe(struct rvin_dev *vin)
 
        vin->src_pad_idx = pad_idx;
 
+       vin->sink_pad_idx = 0;
+       for (pad_idx = 0; pad_idx < sd->entity.num_pads; pad_idx++)
+               if (sd->entity.pads[pad_idx].flags == MEDIA_PAD_FL_SINK) {
+                       vin->sink_pad_idx = pad_idx;
+                       break;
+               }
+
        vin->format.pixelformat = RVIN_DEFAULT_FORMAT;
        rvin_reset_format(vin);
 
diff --git a/drivers/media/platform/rcar-vin/rcar-vin.h 
b/drivers/media/platform/rcar-vin/rcar-vin.h
index 793184d26c17..727e215c0871 100644
--- a/drivers/media/platform/rcar-vin/rcar-vin.h
+++ b/drivers/media/platform/rcar-vin/rcar-vin.h
@@ -92,6 +92,7 @@ struct rvin_graph_entity {
  * @vdev:              V4L2 video device associated with VIN
  * @v4l2_dev:          V4L2 device
  * @src_pad_idx:       source pad index for media controller drivers
+ * @sink_pad_idx:      sink pad index for media controller drivers
  * @ctrl_handler:      V4L2 control handler
  * @notifier:          V4L2 asynchronous subdevs notifier
  * @digital:           entity in the DT for local digital subdevice
@@ -121,6 +122,7 @@ struct rvin_dev {
        struct video_device vdev;
        struct v4l2_device v4l2_dev;
        int src_pad_idx;
+       int sink_pad_idx;
        struct v4l2_ctrl_handler ctrl_handler;
        struct v4l2_async_notifier notifier;
        struct rvin_graph_entity digital;

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