[media] vivi: add v4l2_ctrl_modify_range test case

Update the brighness range depending on the selected input. Useful for
testing control range events.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/platform/vivi.c b/drivers/media/platform/vivi.c
index c46d2e8677a5b93e783b81a01672ec48ee9b2d55..85bc314382d3e7159c0ef67e561f0478b93f3acd 100644 (file)
--- a/drivers/media/platform/vivi.c
+++ b/drivers/media/platform/vivi.c
@@ -1093,6 +1093,15 @@ static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
                return 0;
 
        dev->input = i;
+       /*
+        * Modify the brightness range depending on the input.
+        * This makes it easy to use vivi to test if applications can
+        * handle control range modifications and is also how this is
+        * typically used in practice as different inputs may be hooked
+        * up to different receivers with different control ranges.
+        */
+       v4l2_ctrl_modify_range(dev->brightness,
+                       128 * i, 255 + 128 * i, 1, 127 + 128 * i);
        precalculate_bars(dev);
        precalculate_line(dev);
        return 0;