Use the subdev active state in the max9286 driver to store the
image format.
Replace the .open() function call with the .init_state() one and
simplify the set/get_pad_fmt() operations.
Signed-off-by: Jacopo Mondi <jacopo.mondi@xxxxxxxxxxxxxxxx>
---
drivers/media/i2c/max9286.c | 131 +++++++++++++-----------------------
1 file changed, 46 insertions(+), 85 deletions(-)
diff --git a/drivers/media/i2c/max9286.c b/drivers/media/i2c/max9286.c
index 5321238cad60..cc7ee35560fc 100644
--- a/drivers/media/i2c/max9286.c
+++ b/drivers/media/i2c/max9286.c
@@ -19,7 +19,6 @@
#include <linux/i2c.h>
#include <linux/i2c-mux.h>
#include <linux/module.h>
-#include <linux/mutex.h>
#include <linux/of_graph.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
@@ -198,12 +197,8 @@ struct max9286_priv {
struct v4l2_ctrl *pixelrate_ctrl;
unsigned int pixelrate;
- struct v4l2_mbus_framefmt fmt[MAX9286_N_SINKS];
struct v4l2_fract interval;
- /* Protects controls and fmt structures */
- struct mutex mutex;
-
unsigned int nsources;
unsigned int source_mask;
unsigned int route_mask;
@@ -788,19 +783,22 @@ static void max9286_v4l2_notifier_unregister(struct max9286_priv *priv)
static int max9286_s_stream(struct v4l2_subdev *sd, int enable)
{
struct max9286_priv *priv = sd_to_max9286(sd);
+ struct v4l2_subdev_state *state;
struct max9286_source *source;
unsigned int i;
bool sync = false;
- int ret;
+ int ret = 0;
+
+ state = v4l2_subdev_lock_and_get_active_state(sd);
if (enable) {
const struct v4l2_mbus_framefmt *format;
/*
- * Get the format from the first used sink pad, as all sink
- * formats must be identical.
+ * Get the format from the source pad, as all formats must be
+ * identical.
*/
- format = &priv->fmt[__ffs(priv->bound_sources)];
+ format = v4l2_subdev_state_get_format(state, MAX9286_SRC_PAD);
max9286_set_video_format(priv, format);
max9286_set_fsync_period(priv);
@@ -816,12 +814,12 @@ static int max9286_s_stream(struct v4l2_subdev *sd, int enable)
for_each_source(priv, source) {
ret = v4l2_subdev_call(source->sd, video, s_stream, 1);
if (ret)
- return ret;
+ goto unlock;
}
ret = max9286_check_video_links(priv);
if (ret)
- return ret;
+ goto unlock;
/*
* Wait until frame synchronization is locked.
@@ -842,7 +840,8 @@ static int max9286_s_stream(struct v4l2_subdev *sd, int enable)
if (!sync) {
dev_err(&priv->client->dev,
"Failed to get frame synchronization\n");
- return -EXDEV; /* Invalid cross-device link */
+ ret = -EXDEV; /* Invalid cross-device link */
+ goto unlock;
}
/*
@@ -865,7 +864,10 @@ static int max9286_s_stream(struct v4l2_subdev *sd, int enable)
max9286_i2c_mux_close(priv);
}
- return 0;
+unlock:
+ v4l2_subdev_unlock_state(state);
+
+ return ret;
}
static int max9286_get_frame_interval(struct v4l2_subdev *sd,
@@ -922,31 +924,20 @@ 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_state_get_format(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;
+ unsigned int pad;
unsigned int i;
+ /*
+ * Disable setting format on the source pad: format is propagated
+ * from the sinks.
+ */
if (format->pad == MAX9286_SRC_PAD)
- return -EINVAL;
+ return v4l2_subdev_get_fmt(sd, state, format);
/* Validate the format. */
for (i = 0; i < ARRAY_SIZE(max9286_formats); ++i) {
@@ -957,42 +948,16 @@ static int max9286_set_fmt(struct v4l2_subdev *sd,
if (i == ARRAY_SIZE(max9286_formats))
format->format.code = max9286_formats[0].code;
- 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;
+ *v4l2_subdev_state_get_format(state, format->pad) = format->format;
/*
- * 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.
+ * Apply the same format on the source pad. As all links must have the
+ * same format we do so only when the first source format is set.
*/
- if (pad == MAX9286_SRC_PAD)
- pad = __ffs(priv->bound_sources);
-
- cfg_fmt = max9286_get_pad_format(priv, sd_state, pad, format->which);
- if (!cfg_fmt)
- return -EINVAL;
-
- mutex_lock(&priv->mutex);
- format->format = *cfg_fmt;
- mutex_unlock(&priv->mutex);
+ pad = __ffs(priv->bound_sources);
+ if (pad == format->pad)
+ *v4l2_subdev_state_get_format(state,
+ MAX9286_SRC_PAD) = format->format;
return 0;
}
@@ -1003,7 +968,7 @@ static const struct v4l2_subdev_video_ops max9286_video_ops = {
static const struct v4l2_subdev_pad_ops max9286_pad_ops = {
.enum_mbus_code = max9286_enum_mbus_code,
- .get_fmt = max9286_get_fmt,
+ .get_fmt = v4l2_subdev_get_fmt,
.set_fmt = max9286_set_fmt,
.get_frame_interval = max9286_get_frame_interval,
.set_frame_interval = max9286_set_frame_interval,
@@ -1025,26 +990,20 @@ static const struct v4l2_mbus_framefmt max9286_default_format = {
.xfer_func = V4L2_XFER_FUNC_DEFAULT,
};
-static void max9286_init_format(struct v4l2_mbus_framefmt *fmt)
-{
- *fmt = max9286_default_format;
-}
-
-static int max9286_open(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh)
+static int max9286_init_state(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state)
{
- struct v4l2_mbus_framefmt *format;
- unsigned int i;
+ for (unsigned int i = 0; i < MAX9286_N_SINKS; i++)
+ *v4l2_subdev_state_get_format(state, i) = max9286_default_format;
- for (i = 0; i < MAX9286_N_SINKS; i++) {
- format = v4l2_subdev_state_get_format(fh->state, i);
- max9286_init_format(format);
- }
+ *v4l2_subdev_state_get_format(state,
+ MAX9286_SRC_PAD) = max9286_default_format;
return 0;
}
static const struct v4l2_subdev_internal_ops max9286_subdev_internal_ops = {
- .open = max9286_open,
+ .init_state = max9286_init_state,
};
static const struct media_entity_operations max9286_media_ops = {
@@ -1079,10 +1038,6 @@ static int max9286_v4l2_register(struct max9286_priv *priv)
}
/* Configure V4L2 for the MAX9286 itself */
-
- for (i = 0; i < MAX9286_N_SINKS; i++)
- max9286_init_format(&priv->fmt[i]);
-
v4l2_i2c_subdev_init(&priv->sd, priv->client, &max9286_subdev_ops);
priv->sd.internal_ops = &max9286_subdev_internal_ops;
priv->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
@@ -1109,14 +1064,21 @@ static int max9286_v4l2_register(struct max9286_priv *priv)
if (ret)
goto err_async;
+ priv->sd.state_lock = priv->ctrls.lock;
+ ret = v4l2_subdev_init_finalize(&priv->sd);
+ if (ret)
+ goto err_async;
+
ret = v4l2_async_register_subdev(&priv->sd);
if (ret < 0) {
dev_err(dev, "Unable to register subdevice\n");
- goto err_async;
+ goto err_subdev;
}
return 0;
+err_subdev:
+ v4l2_subdev_cleanup(&priv->sd);
err_async:
v4l2_ctrl_handler_free(&priv->ctrls);
max9286_v4l2_notifier_unregister(priv);
@@ -1126,6 +1088,7 @@ static int max9286_v4l2_register(struct max9286_priv *priv)
static void max9286_v4l2_unregister(struct max9286_priv *priv)
{
+ v4l2_subdev_cleanup(&priv->sd);
v4l2_ctrl_handler_free(&priv->ctrls);
v4l2_async_unregister_subdev(&priv->sd);
max9286_v4l2_notifier_unregister(priv);
@@ -1629,8 +1592,6 @@ static int max9286_probe(struct i2c_client *client)
if (!priv)
return -ENOMEM;
- mutex_init(&priv->mutex);
-
priv->client = client;
/* GPIO values default to high */
--
2.44.0
