[media] media: blackfin: bfin_capture: return -ENODATA for *std calls

this patch adds supports to return -ENODATA to *_std calls
if the selected output does not support it.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Tested-by: Scott Jiang <scott.jiang.linux@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

diff --git a/drivers/media/platform/blackfin/bfin_capture.c b/drivers/media/platform/blackfin/bfin_capture.c
index f2b1a23..f97d94d 100644 (file)
--- a/drivers/media/platform/blackfin/bfin_capture.c
+++ b/drivers/media/platform/blackfin/bfin_capture.c
@@ -440,6 +440,11 @@ static irqreturn_t bcap_isr(int irq, void *dev_id)
 static int bcap_querystd(struct file *file, void *priv, v4l2_std_id *std)
 {
        struct bcap_device *bcap_dev = video_drvdata(file);
+       struct v4l2_input input;
+
+       input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
+       if (!(input.capabilities & V4L2_IN_CAP_STD))
+               return -ENODATA;
 
        return v4l2_subdev_call(bcap_dev->sd, video, querystd, std);
 }
@@ -447,6 +452,11 @@ static int bcap_querystd(struct file *file, void *priv, v4l2_std_id *std)
 static int bcap_g_std(struct file *file, void *priv, v4l2_std_id *std)
 {
        struct bcap_device *bcap_dev = video_drvdata(file);
+       struct v4l2_input input;
+
+       input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
+       if (!(input.capabilities & V4L2_IN_CAP_STD))
+               return -ENODATA;
 
        *std = bcap_dev->std;
        return 0;
@@ -455,8 +465,13 @@ static int bcap_g_std(struct file *file, void *priv, v4l2_std_id *std)
 static int bcap_s_std(struct file *file, void *priv, v4l2_std_id std)
 {
        struct bcap_device *bcap_dev = video_drvdata(file);
+       struct v4l2_input input;
        int ret;
 
+       input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
+       if (!(input.capabilities & V4L2_IN_CAP_STD))
+               return -ENODATA;
+
        if (vb2_is_busy(&bcap_dev->buffer_queue))
                return -EBUSY;