From: Hans Verkuil <hans.verk...@cisco.com>
Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
---
drivers/media/v4l2-core/v4l2-ctrls.c | 150 +++++++++++++++++++++++++++++------
drivers/media/v4l2-core/v4l2-ioctl.c | 4 +-
include/media/v4l2-ctrls.h | 14 ++++
3 files changed, 141 insertions(+), 27 deletions(-)
diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c
b/drivers/media/v4l2-core/v4l2-ctrls.c
index 35d1f3d..df0f3ee 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -1478,6 +1478,15 @@ static int cur_to_user(struct v4l2_ext_control *c,
return ptr_to_user(c, ctrl, ctrl->p_cur);
}
+/* Helper function: copy the store's control value back to the caller */
+static int store_to_user(struct v4l2_ext_control *c,
+ struct v4l2_ctrl *ctrl, unsigned store)
+{
+ if (store == 0)
+ return ptr_to_user(c, ctrl, ctrl->p_new);
+ return ptr_to_user(c, ctrl, ctrl->p_stores[store - 1]);
+}
+
/* Helper function: copy the new control value back to the caller */
static int new_to_user(struct v4l2_ext_control *c,
struct v4l2_ctrl *ctrl)
@@ -1585,6 +1594,14 @@ static void new_to_cur(struct v4l2_fh *fh, struct
v4l2_ctrl *ctrl, u32 ch_flags)
}
}
+/* Helper function: copy the new control value to the store */
+static void new_to_store(struct v4l2_ctrl *ctrl)
+{
+ /* has_changed is set by cluster_changed */
+ if (ctrl && ctrl->has_changed)
+ ptr_to_ptr(ctrl, ctrl->p_new, ctrl->p_stores[ctrl->store - 1]);
+}
+
/* Copy the current value to the new value */
static void cur_to_new(struct v4l2_ctrl *ctrl)
{
@@ -1603,13 +1620,18 @@ static int cluster_changed(struct v4l2_ctrl *master)
for (i = 0; i < master->ncontrols; i++) {
struct v4l2_ctrl *ctrl = master->cluster[i];
+ union v4l2_ctrl_ptr ptr;
bool ctrl_changed = false;
if (ctrl == NULL)
continue;
+ if (ctrl->store)
+ ptr = ctrl->p_stores[ctrl->store - 1];
+ else
+ ptr = ctrl->p_cur;
for (idx = 0; !ctrl_changed && idx < ctrl->elems; idx++)
ctrl_changed = !ctrl->type_ops->equal(ctrl, idx,
- ctrl->p_cur, ctrl->p_new);
+ ptr, ctrl->p_new);
ctrl->has_changed = ctrl_changed;
changed |= ctrl->has_changed;
}
@@ -1740,6 +1762,13 @@ void v4l2_ctrl_handler_free(struct v4l2_ctrl_handler
*hdl)
list_del(&ctrl->node);
list_for_each_entry_safe(sev, next_sev, &ctrl->ev_subs, node)
list_del(&sev->node);
+ if (ctrl->p_stores) {
+ unsigned s;
+
+ for (s = 0; s < ctrl->nr_of_stores; s++)
+ kfree(ctrl->p_stores[s].p);
+ }
+ kfree(ctrl->p_stores);
kfree(ctrl);
}
kfree(hdl->buckets);
@@ -1970,7 +1999,7 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct
v4l2_ctrl_handler *hdl,
handler_set_err(hdl, -ERANGE);
return NULL;
}
- if (is_array &&
+ if ((is_array || (flags & V4L2_CTRL_FLAG_CAN_STORE)) &&
(type == V4L2_CTRL_TYPE_BUTTON ||
type == V4L2_CTRL_TYPE_CTRL_CLASS)) {
handler_set_err(hdl, -EINVAL);
@@ -2084,8 +2113,10 @@ struct v4l2_ctrl *v4l2_ctrl_new_custom(struct
v4l2_ctrl_handler *hdl,
is_menu ? cfg->menu_skip_mask : step, def,
cfg->dims, cfg->elem_size,
flags, qmenu, qmenu_int, priv);
- if (ctrl)
+ if (ctrl) {
ctrl->is_private = cfg->is_private;
+ ctrl->can_store = cfg->can_store;
+ }
return ctrl;
}
EXPORT_SYMBOL(v4l2_ctrl_new_custom);
@@ -2452,6 +2483,7 @@ int v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)
cur_to_new(master->cluster[i]);
master->cluster[i]->is_new = 1;
master->cluster[i]->done = true;
+ master->cluster[i]->store = 0;
}
}
ret = call_op(master, s_ctrl);
@@ -2539,6 +2571,8 @@ int v4l2_query_ext_ctrl(struct v4l2_ctrl_handler *hdl,
struct v4l2_query_ext_ctr
qc->id = ctrl->id;
strlcpy(qc->name, ctrl->name, sizeof(qc->name));
qc->flags = ctrl->flags;
+ if (ctrl->can_store)
+ qc->flags |= V4L2_CTRL_FLAG_CAN_STORE;
qc->type = ctrl->type;
if (ctrl->is_ptr)
qc->flags |= V4L2_CTRL_FLAG_HAS_PAYLOAD;
@@ -2700,6 +2734,8 @@ static int prepare_ext_ctrls(struct v4l2_ctrl_handler
*hdl,
struct v4l2_ctrl_helper *helpers,
bool get)
{
+ u32 ctrl_class = V4L2_CTRL_ID2CLASS(cs->ctrl_class);
+ unsigned store = cs->config_store & 0xffff;
struct v4l2_ctrl_helper *h;
bool have_clusters = false;
u32 i;
@@ -2712,7 +2748,7 @@ static int prepare_ext_ctrls(struct v4l2_ctrl_handler
*hdl,
cs->error_idx = i;
- if (cs->ctrl_class && V4L2_CTRL_ID2CLASS(id) != cs->ctrl_class)
+ if (ctrl_class && V4L2_CTRL_ID2CLASS(id) != ctrl_class)
return -EINVAL;
/* Old-style private controls are not allowed for
@@ -2725,6 +2761,8 @@ static int prepare_ext_ctrls(struct v4l2_ctrl_handler
*hdl,
ctrl = ref->ctrl;
if (ctrl->flags & V4L2_CTRL_FLAG_DISABLED)
return -EINVAL;
+ if (store && !ctrl->can_store)
+ return -EINVAL;
if (ctrl->cluster[0]->ncontrols > 1)
have_clusters = true;
@@ -2796,6 +2834,32 @@ static int class_check(struct v4l2_ctrl_handler *hdl,
u32 ctrl_class)
return find_ref_lock(hdl, ctrl_class | 1) ? 0 : -EINVAL;
}
+static int extend_store(struct v4l2_ctrl *ctrl, unsigned stores)
+{
+ unsigned s, idx;
+ union v4l2_ctrl_ptr *p;
+
+ p = kcalloc(stores, sizeof(union v4l2_ctrl_ptr), GFP_KERNEL);
+ if (p == NULL)
+ return -ENOMEM;
+ for (s = ctrl->nr_of_stores; s < stores; s++) {
+ p[s].p = kcalloc(ctrl->elems, ctrl->elem_size, GFP_KERNEL);
+ if (p[s].p == NULL) {
+ while (s > ctrl->nr_of_stores)
+ kfree(p[--s].p);
+ kfree(p);
+ return -ENOMEM;
+ }
+ for (idx = 0; idx < ctrl->elems; idx++)
+ ctrl->type_ops->init(ctrl, idx, p[s]);
+ }
+ if (ctrl->p_stores)
+ memcpy(p, ctrl->p_stores, ctrl->nr_of_stores * sizeof(union
v4l2_ctrl_ptr));
+ kfree(ctrl->p_stores);
+ ctrl->p_stores = p;
+ ctrl->nr_of_stores = stores;
+ return 0;
+}
/* Get extended controls. Allocates the helpers array if needed. */
@@ -2803,17 +2867,21 @@ int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl,
struct v4l2_ext_controls *cs
{
struct v4l2_ctrl_helper helper[4];
struct v4l2_ctrl_helper *helpers = helper;
+ unsigned store = 0;
int ret;
int i, j;
cs->error_idx = cs->count;
- cs->ctrl_class = V4L2_CTRL_ID2CLASS(cs->ctrl_class);
+ if (V4L2_CTRL_ID2CLASS(cs->ctrl_class))
+ cs->ctrl_class = V4L2_CTRL_ID2CLASS(cs->ctrl_class);
+ else
+ store = cs->config_store;
if (hdl == NULL)
return -EINVAL;
if (cs->count == 0)
- return class_check(hdl, cs->ctrl_class);
+ return class_check(hdl, V4L2_CTRL_ID2CLASS(cs->ctrl_class));
if (cs->count > ARRAY_SIZE(helper)) {
helpers = kmalloc_array(cs->count, sizeof(helper[0]),
@@ -2843,13 +2911,19 @@ int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl,
struct v4l2_ext_controls *cs
v4l2_ctrl_lock(master);
/* g_volatile_ctrl will update the new control values */
- if ((master->flags & V4L2_CTRL_FLAG_VOLATILE) ||
- (master->has_volatiles && !is_cur_manual(master))) {
+ if (store == 0 &&
+ ((master->flags & V4L2_CTRL_FLAG_VOLATILE) ||
+ (master->has_volatiles && !is_cur_manual(master)))) {
for (j = 0; j < master->ncontrols; j++)
cur_to_new(master->cluster[j]);
ret = call_op(master, g_volatile_ctrl);
ctrl_to_user = new_to_user;
}
+ for (j = 0; j < master->ncontrols; j++)
+ if (!ret && master->cluster[j] &&
+ store > master->cluster[j]->nr_of_stores)
+ ret = extend_store(master->cluster[j], store);
+
/* If OK, then copy the current (for non-volatile controls)
or the new (for volatile controls) control values to the
caller */
@@ -2857,7 +2931,11 @@ int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl,
struct v4l2_ext_controls *cs
u32 idx = i;
do {
- ret = ctrl_to_user(cs->controls + idx,
+ if (store)
+ ret = store_to_user(cs->controls + idx,
+ helpers[idx].ctrl, store);
+ else
+ ret = ctrl_to_user(cs->controls + idx,
helpers[idx].ctrl);
idx = helpers[idx].next;
} while (!ret && idx);
@@ -2952,12 +3030,11 @@ s64 v4l2_ctrl_g_ctrl_int64(struct v4l2_ctrl *ctrl)
}
EXPORT_SYMBOL(v4l2_ctrl_g_ctrl_int64);
-
/* Core function that calls try/s_ctrl and ensures that the new value is
copied to the current value on a set.
Must be called with ctrl->handler->lock held. */
static int try_or_set_cluster(struct v4l2_fh *fh, struct v4l2_ctrl *master,
- bool set, u32 ch_flags)
+ u16 store, bool set, u32 ch_flags)
{
bool update_flag;
int ret;
@@ -2973,6 +3050,14 @@ static int try_or_set_cluster(struct v4l2_fh *fh, struct
v4l2_ctrl *master,
if (ctrl == NULL)
continue;
+ if (store && !ctrl->can_store)
+ return -EINVAL;
+ if (store > ctrl->nr_of_stores) {
+ ret = extend_store(ctrl, store);
+ if (ret)
+ return ret;
+ }
+ ctrl->store = store;
if (!ctrl->is_new) {
cur_to_new(ctrl);
continue;
@@ -2994,9 +3079,13 @@ static int try_or_set_cluster(struct v4l2_fh *fh, struct
v4l2_ctrl *master,
/* If OK, then make the new values permanent. */
update_flag = is_cur_manual(master) != is_new_manual(master);
- for (i = 0; i < master->ncontrols; i++)
- new_to_cur(fh, master->cluster[i], ch_flags |
- ((update_flag && i > 0) ? V4L2_EVENT_CTRL_CH_FLAGS :
0));
+ for (i = 0; i < master->ncontrols; i++) {
+ if (store)
+ new_to_store(master->cluster[i]);
+ else
+ new_to_cur(fh, master->cluster[i], ch_flags |
+ ((update_flag && i > 0) ?
V4L2_EVENT_CTRL_CH_FLAGS : 0));
+ }
return 0;
}
@@ -3036,8 +3125,12 @@ static void update_from_auto_cluster(struct v4l2_ctrl
*master)
{
int i;
- for (i = 0; i < master->ncontrols; i++)
+ for (i = 0; i < master->ncontrols; i++) {
+ if (master->cluster[i] == NULL)
+ continue;
cur_to_new(master->cluster[i]);
+ master->cluster[i]->store = 0;
+ }
if (!call_op(master, g_volatile_ctrl))
for (i = 1; i < master->ncontrols; i++)
if (master->cluster[i])
@@ -3051,17 +3144,21 @@ static int try_set_ext_ctrls(struct v4l2_fh *fh, struct
v4l2_ctrl_handler *hdl,
{
struct v4l2_ctrl_helper helper[4];
struct v4l2_ctrl_helper *helpers = helper;
+ unsigned store = 0;
unsigned i, j;
int ret;
cs->error_idx = cs->count;
- cs->ctrl_class = V4L2_CTRL_ID2CLASS(cs->ctrl_class);
+ if (V4L2_CTRL_ID2CLASS(cs->ctrl_class))
+ cs->ctrl_class = V4L2_CTRL_ID2CLASS(cs->ctrl_class);
+ else
+ store = cs->config_store;
if (hdl == NULL)
return -EINVAL;
if (cs->count == 0)
- return class_check(hdl, cs->ctrl_class);
+ return class_check(hdl, V4L2_CTRL_ID2CLASS(cs->ctrl_class));
if (cs->count > ARRAY_SIZE(helper)) {
helpers = kmalloc_array(cs->count, sizeof(helper[0]),
@@ -3096,7 +3193,7 @@ static int try_set_ext_ctrls(struct v4l2_fh *fh, struct
v4l2_ctrl_handler *hdl,
first since those will become the new manual values (which
may be overwritten by explicit new values from this set
of controls). */
- if (master->is_auto && master->has_volatiles &&
+ if (!store && master->is_auto && master->has_volatiles &&
!is_cur_manual(master)) {
/* Pick an initial non-manual value */
s32 new_auto_val = master->manual_mode_value + 1;
@@ -3123,14 +3220,14 @@ static int try_set_ext_ctrls(struct v4l2_fh *fh, struct
v4l2_ctrl_handler *hdl,
} while (!ret && idx);
if (!ret)
- ret = try_or_set_cluster(fh, master, set, 0);
+ ret = try_or_set_cluster(fh, master, store, set, 0);
/* Copy the new values back to userspace. */
if (!ret) {
idx = i;
do {
- ret = new_to_user(cs->controls + idx,
- helpers[idx].ctrl);
+ ret = store_to_user(cs->controls + idx,
+ helpers[idx].ctrl, store);
idx = helpers[idx].next;
} while (!ret && idx);
}
@@ -3175,9 +3272,12 @@ static int set_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl
*ctrl,
int i;
/* Reset the 'is_new' flags of the cluster */
- for (i = 0; i < master->ncontrols; i++)
- if (master->cluster[i])
- master->cluster[i]->is_new = 0;
+ for (i = 0; i < master->ncontrols; i++) {
+ if (master->cluster[i] == NULL)
+ continue;
+ master->cluster[i]->is_new = 0;
+ master->cluster[i]->store = 0;
+ }
if (c)
user_to_new(c, ctrl);
@@ -3190,7 +3290,7 @@ static int set_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl
*ctrl,
update_from_auto_cluster(master);
ctrl->is_new = 1;
- return try_or_set_cluster(fh, master, true, ch_flags);
+ return try_or_set_cluster(fh, master, 0, true, ch_flags);
}
/* Helper function for VIDIOC_S_CTRL compatibility */
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c
b/drivers/media/v4l2-core/v4l2-ioctl.c
index 46f4c04..628852c 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -533,8 +533,8 @@ static void v4l_print_query_ext_ctrl(const void *arg, bool
write_only)
pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%lld/%lld, "
"step=%lld, default=%lld, flags=0x%08x, elem_size=%u, elems=%u,
"
"nr_of_dims=%u, dims=%u,%u,%u,%u\n",
- p->id, p->type, (int)sizeof(p->name), p->name,
- p->minimum, p->maximum,
+ p->id, p->type, (int)sizeof(p->name),
+ p->name, p->minimum, p->maximum,
p->step, p->default_value, p->flags,
p->elem_size, p->elems, p->nr_of_dims,
p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h
index b7cd7a6..4c31688 100644
--- a/include/media/v4l2-ctrls.h
+++ b/include/media/v4l2-ctrls.h
@@ -122,6 +122,7 @@ typedef void (*v4l2_ctrl_notify_fnc)(struct v4l2_ctrl
*ctrl, void *priv);
* Drivers should never touch this flag.
* @call_notify: If set, then call the handler's notify function whenever the
* control's value changes.
+ * @can_store: If set, then this control supports configuration stores.
* @manual_mode_value: If the is_auto flag is set, then this is the value
* of the auto control that determines if that control is in
* manual mode. So if the value of the auto control equals this
@@ -140,6 +141,8 @@ typedef void (*v4l2_ctrl_notify_fnc)(struct v4l2_ctrl
*ctrl, void *priv);
* @elem_size: The size in bytes of the control.
* @dims: The size of each dimension.
* @nr_of_dims:The number of dimensions in @dims.
+ * @nr_of_stores: The number of allocated configuration stores of this
control.
+ * @store: The configuration store that the control op operates on.
* @menu_skip_mask: The control's skip mask for menu controls. This makes it
* easy to skip menu items that are not valid. If bit X is set,
* then menu item X is skipped. Of course, this only works for
@@ -179,6 +182,7 @@ struct v4l2_ctrl {
unsigned int is_array:1;
unsigned int has_volatiles:1;
unsigned int call_notify:1;
+ unsigned int can_store:1;
unsigned int manual_mode_value:8;
const struct v4l2_ctrl_ops *ops;
@@ -191,6 +195,8 @@ struct v4l2_ctrl {
u32 elem_size;
u32 dims[V4L2_CTRL_MAX_DIMS];
u32 nr_of_dims;
+ u16 nr_of_stores;
+ u16 store;
union {
u64 step;
u64 menu_skip_mask;
@@ -208,6 +214,7 @@ struct v4l2_ctrl {
union v4l2_ctrl_ptr p_new;
union v4l2_ctrl_ptr p_cur;
+ union v4l2_ctrl_ptr *p_stores;
};
/** struct v4l2_ctrl_ref - The control reference.
@@ -284,6 +291,7 @@ struct v4l2_ctrl_handler {
* must be NULL.
* @is_private: If set, then this control is private to its handler and it
* will not be added to any other handlers.
+ * @can_store: If set, then this control supports configuration stores.
*/
struct v4l2_ctrl_config {
const struct v4l2_ctrl_ops *ops;
@@ -302,6 +310,7 @@ struct v4l2_ctrl_config {
const char * const *qmenu;
const s64 *qmenu_int;
unsigned int is_private:1;
+ unsigned int can_store:1;
};
/** v4l2_ctrl_fill() - Fill in the control fields based on the control ID.
@@ -763,6 +772,11 @@ static inline int v4l2_ctrl_s_ctrl_string(struct v4l2_ctrl
*ctrl, const char *s)
return rval;
}
+static inline void v4l2_ctrl_can_store(struct v4l2_ctrl *ctrl)
+{
+ ctrl->can_store = true;
+}
+
/* Internal helper functions that deal with control events. */
extern const struct v4l2_subscribed_event_ops v4l2_ctrl_sub_ev_ops;
void v4l2_ctrl_replace(struct v4l2_event *old, const struct v4l2_event *new);
--
2.1.0
--
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