[PATCH v4 5/6] media: max9286: Move format to subdev state

Jacopo Mondi
2021-12-16T17:47:24Z

Move format handling to the v4l2_subdev state and store it per
(pad, stream) combination.

Now that the image format is stored in the subdev state, it can be
accessed through v4l2_subdev_get_fmt() instead of open-coding it.

Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
---
drivers/media/i2c/max9286.c | 86 ++++++++++++-------------------------
1 file changed, 27 insertions(+), 59 deletions(-)

diff --git a/drivers/media/i2c/max9286.c b/drivers/media/i2c/max9286.c
index 5d728fa23f01..aa7cb7c10fc0 100644
--- a/drivers/media/i2c/max9286.c
+++ b/drivers/media/i2c/max9286.c
@@ -174,8 +174,6 @@ struct max9286_priv {
struct v4l2_ctrl_handler ctrls;
struct v4l2_ctrl *pixelrate;

- struct v4l2_mbus_framefmt fmt[MAX9286_N_SINKS];
-
/* Protects controls and fmt structures */
struct mutex mutex;

@@ -828,28 +826,17 @@ static int max9286_enum_mbus_code(struct v4l2_subdev *sd,
return 0;
}

-static struct v4l2_mbus_framefmt *
-max9286_get_pad_format(struct max9286_priv *priv,
- struct v4l2_subdev_state *sd_state,
- unsigned int pad, u32 which)
-{
- switch (which) {
- case V4L2_SUBDEV_FORMAT_TRY:
- return v4l2_subdev_get_try_format(&priv->sd, sd_state, pad);
- case V4L2_SUBDEV_FORMAT_ACTIVE:
- return &priv->fmt[pad];
- default:
- return NULL;
- }
-}
-
static int max9286_set_fmt(struct v4l2_subdev *sd,
- struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_state *state,
struct v4l2_subdev_format *format)
{
- struct max9286_priv *priv = sd_to_max9286(sd);
- struct v4l2_mbus_framefmt *cfg_fmt;
+ struct v4l2_mbus_framefmt *fmt;
+ int ret = 0;

+ /*
+ * Refuse to set format on the multiplexed source pad.
+ * Format is propagated from sinks streams to source streams.
+ */
if (format->pad == MAX9286_SRC_PAD)
return -EINVAL;

@@ -865,44 +852,28 @@ static int max9286_set_fmt(struct v4l2_subdev *sd,
break;
}

- cfg_fmt = max9286_get_pad_format(priv, sd_state, format->pad,
- format->which);
- if (!cfg_fmt)
- return -EINVAL;
-
- mutex_lock(&priv->mutex);
- *cfg_fmt = format->format;
- mutex_unlock(&priv->mutex);
-
- return 0;
-}
-
-static int max9286_get_fmt(struct v4l2_subdev *sd,
- struct v4l2_subdev_state *sd_state,
- struct v4l2_subdev_format *format)
-{
- struct max9286_priv *priv = sd_to_max9286(sd);
- struct v4l2_mbus_framefmt *cfg_fmt;
- unsigned int pad = format->pad;
-
- /*
- * Multiplexed Stream Support: Support link validation by returning the
- * format of the first bound link. All links must have the same format,
- * as we do not support mixing and matching of cameras connected to the
- * max9286.
- */
- if (pad == MAX9286_SRC_PAD)
- pad = __ffs(priv->bound_sources);
+ v4l2_subdev_lock_state(state);
+ fmt = v4l2_state_get_stream_format(state, format->pad,
+ format->stream);
+ if (!fmt) {
+ ret = -EINVAL;
+ goto out;
+ }
+ *fmt = format->format;

- cfg_fmt = max9286_get_pad_format(priv, sd_state, pad, format->which);
- if (!cfg_fmt)
- return -EINVAL;
+ /* Propagate format to the other end of the route. */
+ fmt = v4l2_subdev_state_get_opposite_stream_format(state, format->pad,
+ format->stream);
+ if (!fmt) {
+ ret = -EINVAL;
+ goto out;
+ }
+ *fmt = format->format;

- mutex_lock(&priv->mutex);
- format->format = *cfg_fmt;
- mutex_unlock(&priv->mutex);
+out:
+ v4l2_subdev_unlock_state(state);

- return 0;
+ return ret;
}

static int max9286_routing_validate(struct max9286_priv *priv,
@@ -1052,7 +1023,7 @@ static const struct v4l2_subdev_video_ops max9286_video_ops = {
static const struct v4l2_subdev_pad_ops max9286_pad_ops = {
.init_cfg = max9286_init_cfg,
.enum_mbus_code = max9286_enum_mbus_code,
- .get_fmt = max9286_get_fmt,
+ .get_fmt = v4l2_subdev_get_fmt,
.set_fmt = max9286_set_fmt,
.set_routing = max9286_set_routing,
};
@@ -1092,9 +1063,6 @@ static int max9286_v4l2_register(struct max9286_priv *priv)

/* Configure V4L2 for the MAX9286 itself */

- for (i = 0; i < MAX9286_N_SINKS; i++)
- priv->fmt[i] = max9286_default_format;
-
v4l2_i2c_subdev_init(&priv->sd, priv->client, &max9286_subdev_ops);
priv->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
V4L2_SUBDEV_FL_MULTIPLEXED;
--
2.33.1