Currently try format implementation doesn't check if subdevice has
get_selection ops implemented and returns -EINVAL on error from
direct v4l2_subdev_call of get_selection.
Selection API's are not mandatory for all V4L2 subdevices.
This patch fixes it by adding v4l2_subdev_has_ops check prior to
calling get_selection ops and continues with try or set format with
zero crop settings for subdevices that don't have get_selection and
returns -EINVAL only for subdevices that has get_selection ops.
Signed-off-by: Sowjanya Komatineni <skomatineni@xxxxxxxxxx>
---
drivers/staging/media/tegra-video/vi.c | 17 ++++++++++++-----
1 file changed, 12 insertions(+), 5 deletions(-)
diff --git a/drivers/staging/media/tegra-video/vi.c b/drivers/staging/media/tegra-video/vi.c
index 560d8b3..7edd35c 100644
--- a/drivers/staging/media/tegra-video/vi.c
+++ b/drivers/staging/media/tegra-video/vi.c
@@ -533,11 +533,18 @@ static int __tegra_channel_try_format(struct tegra_vi_channel *chan,
fse.code = fmtinfo->code;
ret = v4l2_subdev_call(subdev, pad, enum_frame_size, pad_cfg, &fse);
if (ret) {
- ret = v4l2_subdev_call(subdev, pad, get_selection, NULL, &sdsel);
- if (ret)
- return -EINVAL;
- pad_cfg->try_crop.width = sdsel.r.width;
- pad_cfg->try_crop.height = sdsel.r.height;
+ if (!v4l2_subdev_has_op(subdev, pad, get_selection)) {
+ pad_cfg->try_crop.width = 0;
+ pad_cfg->try_crop.height = 0;
+ } else {
+ ret = v4l2_subdev_call(subdev, pad, get_selection,
+ NULL, &sdsel);
+ if (ret)
+ return -EINVAL;
+
+ pad_cfg->try_crop.width = sdsel.r.width;
+ pad_cfg->try_crop.height = sdsel.r.height;
+ }
} else {
pad_cfg->try_crop.width = fse.max_width;
pad_cfg->try_crop.height = fse.max_height;
--
2.7.4
