The MAX9286 chip does not allow any modification to the image stream
format it de-serializes from the GMSL bus to its MIPI CSI-2 output
interface.
For this reason, when the format is queried from on any of the MAX9286
pads, get the remote subdevice format and return it.
Signed-off-by: Jacopo Mondi <jacopo+renesas@xxxxxxxxxx>
---
drivers/media/i2c/max9286.c | 26 +++++++++++++++++++++-----
1 file changed, 21 insertions(+), 5 deletions(-)
diff --git a/drivers/media/i2c/max9286.c b/drivers/media/i2c/max9286.c
index 7c292f2e2704..e6a70dbd27df 100644
--- a/drivers/media/i2c/max9286.c
+++ b/drivers/media/i2c/max9286.c
@@ -742,8 +742,10 @@ static int max9286_get_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_format *format)
{
struct max9286_priv *priv = sd_to_max9286(sd);
- struct v4l2_mbus_framefmt *cfg_fmt;
+ struct v4l2_subdev_format remote_fmt = {};
+ struct device *dev = &priv->client->dev;
unsigned int pad = format->pad;
+ int ret;
/*
* Multiplexed Stream Support: Support link validation by returning the
@@ -754,12 +756,26 @@ static int max9286_get_fmt(struct v4l2_subdev *sd,
if (pad == MAX9286_SRC_PAD)
pad = __ffs(priv->bound_sources);
- cfg_fmt = max9286_get_pad_format(priv, cfg, pad, format->which);
- if (!cfg_fmt)
- return -EINVAL;
+ if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
+ mutex_lock(&priv->mutex);
+ format->format = *v4l2_subdev_get_try_format(&priv->sd,
+ cfg, pad);
+ mutex_unlock(&priv->mutex);
+
+ return 0;
+ }
+
+ remote_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
+ remote_fmt.pad = 0;
+ ret = v4l2_subdev_call(priv->sources[pad].sd, pad, get_fmt, NULL,
+ &remote_fmt);
+ if (ret) {
+ dev_err(dev, "Unable get format on source %d\n", pad);
+ return ret;
+ }
mutex_lock(&priv->mutex);
- format->format = *cfg_fmt;
+ format->format = remote_fmt.format;
mutex_unlock(&priv->mutex);
return 0;
--
2.27.0
