media: v4l2: import HTC v4l2 stack
HTC kernel version: villeu-jb-crc-3.4.10-ae8b65e
Change-Id: Ib3cf788a9931b4efa68380ff6adf6ea6359a9ef9
diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h
index 3a44b62..166f624 100644
--- a/include/media/v4l2-ctrls.h
+++ b/include/media/v4l2-ctrls.h
@@ -22,94 +22,23 @@
#define _V4L2_CTRLS_H
#include <linux/list.h>
+#include <linux/device.h>
#include <linux/videodev2.h>
-/* forward references */
struct v4l2_ctrl_handler;
-struct v4l2_ctrl_helper;
struct v4l2_ctrl;
struct video_device;
struct v4l2_subdev;
-struct v4l2_subscribed_event;
-struct v4l2_fh;
-struct poll_table_struct;
-struct file;
-/** struct v4l2_ctrl_ops - The control operations that the driver has to provide.
- * @g_volatile_ctrl: Get a new value for this control. Generally only relevant
- * for volatile (and usually read-only) controls such as a control
- * that returns the current signal strength which changes
- * continuously.
- * If not set, then the currently cached value will be returned.
- * @try_ctrl: Test whether the control's value is valid. Only relevant when
- * the usual min/max/step checks are not sufficient.
- * @s_ctrl: Actually set the new control value. s_ctrl is compulsory. The
- * ctrl->handler->lock is held when these ops are called, so no
- * one else can access controls owned by that handler.
- */
struct v4l2_ctrl_ops {
int (*g_volatile_ctrl)(struct v4l2_ctrl *ctrl);
int (*try_ctrl)(struct v4l2_ctrl *ctrl);
int (*s_ctrl)(struct v4l2_ctrl *ctrl);
};
-/** struct v4l2_ctrl - The control structure.
- * @node: The list node.
- * @ev_subs: The list of control event subscriptions.
- * @handler: The handler that owns the control.
- * @cluster: Point to start of cluster array.
- * @ncontrols: Number of controls in cluster array.
- * @done: Internal flag: set for each processed control.
- * @is_new: Set when the user specified a new value for this control. It
- * is also set when called from v4l2_ctrl_handler_setup. Drivers
- * should never set this flag.
- * @is_private: If set, then this control is private to its handler and it
- * will not be added to any other handlers. Drivers can set
- * this flag.
- * @is_auto: If set, then this control selects whether the other cluster
- * members are in 'automatic' mode or 'manual' mode. This is
- * used for autogain/gain type clusters. Drivers should never
- * set this flag directly.
- * @has_volatiles: If set, then one or more members of the cluster are volatile.
- * Drivers should never touch this flag.
- * @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
- * value, then the whole cluster is in manual mode. Drivers should
- * never set this flag directly.
- * @ops: The control ops.
- * @id: The control ID.
- * @name: The control name.
- * @type: The control type.
- * @minimum: The control's minimum value.
- * @maximum: The control's maximum value.
- * @default_value: The control's default value.
- * @step: The control's step value for non-menu controls.
- * @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
- * menus with <= 32 menu items. There are no menus that come
- * close to that number, so this is OK. Should we ever need more,
- * then this will have to be extended to a u64 or a bit array.
- * @qmenu: A const char * array for all menu items. Array entries that are
- * empty strings ("") correspond to non-existing menu items (this
- * is in addition to the menu_skip_mask above). The last entry
- * must be NULL.
- * @flags: The control's flags.
- * @cur: The control's current value.
- * @val: The control's new s32 value.
- * @val64: The control's new s64 value.
- * @string: The control's new string value.
- * @priv: The control's private pointer. For use by the driver. It is
- * untouched by the control framework. Note that this pointer is
- * not freed when the control is deleted. Should this be needed
- * then a new internal bitfield can be added to tell the framework
- * to free this pointer.
- */
struct v4l2_ctrl {
- /* Administrative fields */
+
struct list_head node;
- struct list_head ev_subs;
struct v4l2_ctrl_handler *handler;
struct v4l2_ctrl **cluster;
unsigned ncontrols;
@@ -117,9 +46,7 @@
unsigned int is_new:1;
unsigned int is_private:1;
- unsigned int is_auto:1;
- unsigned int has_volatiles:1;
- unsigned int manual_mode_value:8;
+ unsigned int is_volatile:1;
const struct v4l2_ctrl_ops *ops;
u32 id;
@@ -145,36 +72,12 @@
void *priv;
};
-/** struct v4l2_ctrl_ref - The control reference.
- * @node: List node for the sorted list.
- * @next: Single-link list node for the hash.
- * @ctrl: The actual control information.
- * @helper: Pointer to helper struct. Used internally in prepare_ext_ctrls().
- *
- * Each control handler has a list of these refs. The list_head is used to
- * keep a sorted-by-control-ID list of all controls, while the next pointer
- * is used to link the control in the hash's bucket.
- */
struct v4l2_ctrl_ref {
struct list_head node;
struct v4l2_ctrl_ref *next;
struct v4l2_ctrl *ctrl;
- struct v4l2_ctrl_helper *helper;
};
-/** struct v4l2_ctrl_handler - The control handler keeps track of all the
- * controls: both the controls owned by the handler and those inherited
- * from other handlers.
- * @lock: Lock to control access to this handler and its controls.
- * @ctrls: The list of controls owned by this handler.
- * @ctrl_refs: The list of control references.
- * @cached: The last found control reference. It is common that the same
- * control is needed multiple times, so this is a simple
- * optimization.
- * @buckets: Buckets for the hashing. Allows for quick control lookup.
- * @nr_of_buckets: Total number of buckets in the array.
- * @error: The error code of the first failed control addition.
- */
struct v4l2_ctrl_handler {
struct mutex lock;
struct list_head ctrls;
@@ -185,29 +88,6 @@
int error;
};
-/** struct v4l2_ctrl_config - Control configuration structure.
- * @ops: The control ops.
- * @id: The control ID.
- * @name: The control name.
- * @type: The control type.
- * @min: The control's minimum value.
- * @max: The control's maximum value.
- * @step: The control's step value for non-menu controls.
- * @def: The control's default value.
- * @flags: The control's flags.
- * @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
- * menus with <= 32 menu items. There are no menus that come
- * close to that number, so this is OK. Should we ever need more,
- * then this will have to be extended to a u64 or a bit array.
- * @qmenu: A const char * array for all menu items. Array entries that are
- * empty strings ("") correspond to non-existing menu items (this
- * is in addition to the menu_skip_mask above). The last entry
- * 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.
- */
struct v4l2_ctrl_config {
const struct v4l2_ctrl_ops *ops;
u32 id;
@@ -221,303 +101,73 @@
u32 menu_skip_mask;
const char * const *qmenu;
unsigned int is_private:1;
+ unsigned int is_volatile:1;
};
-/** v4l2_ctrl_fill() - Fill in the control fields based on the control ID.
- *
- * This works for all standard V4L2 controls.
- * For non-standard controls it will only fill in the given arguments
- * and @name will be NULL.
- *
- * This function will overwrite the contents of @name, @type and @flags.
- * The contents of @min, @max, @step and @def may be modified depending on
- * the type.
- *
- * Do not use in drivers! It is used internally for backwards compatibility
- * control handling only. Once all drivers are converted to use the new
- * control framework this function will no longer be exported.
- */
void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
s32 *min, s32 *max, s32 *step, s32 *def, u32 *flags);
-/** v4l2_ctrl_handler_init() - Initialize the control handler.
- * @hdl: The control handler.
- * @nr_of_controls_hint: A hint of how many controls this handler is
- * expected to refer to. This is the total number, so including
- * any inherited controls. It doesn't have to be precise, but if
- * it is way off, then you either waste memory (too many buckets
- * are allocated) or the control lookup becomes slower (not enough
- * buckets are allocated, so there are more slow list lookups).
- * It will always work, though.
- *
- * Returns an error if the buckets could not be allocated. This error will
- * also be stored in @hdl->error.
- */
int v4l2_ctrl_handler_init(struct v4l2_ctrl_handler *hdl,
unsigned nr_of_controls_hint);
-/** v4l2_ctrl_handler_free() - Free all controls owned by the handler and free
- * the control list.
- * @hdl: The control handler.
- *
- * Does nothing if @hdl == NULL.
- */
void v4l2_ctrl_handler_free(struct v4l2_ctrl_handler *hdl);
-/** v4l2_ctrl_handler_setup() - Call the s_ctrl op for all controls belonging
- * to the handler to initialize the hardware to the current control values.
- * @hdl: The control handler.
- *
- * Button controls will be skipped, as are read-only controls.
- *
- * If @hdl == NULL, then this just returns 0.
- */
int v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl);
-/** v4l2_ctrl_handler_log_status() - Log all controls owned by the handler.
- * @hdl: The control handler.
- * @prefix: The prefix to use when logging the control values. If the
- * prefix does not end with a space, then ": " will be added
- * after the prefix. If @prefix == NULL, then no prefix will be
- * used.
- *
- * For use with VIDIOC_LOG_STATUS.
- *
- * Does nothing if @hdl == NULL.
- */
void v4l2_ctrl_handler_log_status(struct v4l2_ctrl_handler *hdl,
const char *prefix);
-/** v4l2_ctrl_new_custom() - Allocate and initialize a new custom V4L2
- * control.
- * @hdl: The control handler.
- * @cfg: The control's configuration data.
- * @priv: The control's driver-specific private data.
- *
- * If the &v4l2_ctrl struct could not be allocated then NULL is returned
- * and @hdl->error is set to the error code (if it wasn't set already).
- */
struct v4l2_ctrl *v4l2_ctrl_new_custom(struct v4l2_ctrl_handler *hdl,
const struct v4l2_ctrl_config *cfg, void *priv);
-/** v4l2_ctrl_new_std() - Allocate and initialize a new standard V4L2 non-menu control.
- * @hdl: The control handler.
- * @ops: The control ops.
- * @id: The control ID.
- * @min: The control's minimum value.
- * @max: The control's maximum value.
- * @step: The control's step value
- * @def: The control's default value.
- *
- * If the &v4l2_ctrl struct could not be allocated, or the control
- * ID is not known, then NULL is returned and @hdl->error is set to the
- * appropriate error code (if it wasn't set already).
- *
- * If @id refers to a menu control, then this function will return NULL.
- *
- * Use v4l2_ctrl_new_std_menu() when adding menu controls.
- */
struct v4l2_ctrl *v4l2_ctrl_new_std(struct v4l2_ctrl_handler *hdl,
const struct v4l2_ctrl_ops *ops,
u32 id, s32 min, s32 max, u32 step, s32 def);
-/** v4l2_ctrl_new_std_menu() - Allocate and initialize a new standard V4L2 menu control.
- * @hdl: The control handler.
- * @ops: The control ops.
- * @id: The control ID.
- * @max: The control's maximum value.
- * @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
- * menus with <= 32 menu items. There are no menus that come
- * close to that number, so this is OK. Should we ever need more,
- * then this will have to be extended to a u64 or a bit array.
- * @def: The control's default value.
- *
- * Same as v4l2_ctrl_new_std(), but @min is set to 0 and the @mask value
- * determines which menu items are to be skipped.
- *
- * If @id refers to a non-menu control, then this function will return NULL.
- */
struct v4l2_ctrl *v4l2_ctrl_new_std_menu(struct v4l2_ctrl_handler *hdl,
const struct v4l2_ctrl_ops *ops,
u32 id, s32 max, s32 mask, s32 def);
-/** v4l2_ctrl_add_ctrl() - Add a control from another handler to this handler.
- * @hdl: The control handler.
- * @ctrl: The control to add.
- *
- * It will return NULL if it was unable to add the control reference.
- * If the control already belonged to the handler, then it will do
- * nothing and just return @ctrl.
- */
struct v4l2_ctrl *v4l2_ctrl_add_ctrl(struct v4l2_ctrl_handler *hdl,
struct v4l2_ctrl *ctrl);
-/** v4l2_ctrl_add_handler() - Add all controls from handler @add to
- * handler @hdl.
- * @hdl: The control handler.
- * @add: The control handler whose controls you want to add to
- * the @hdl control handler.
- *
- * Does nothing if either of the two is a NULL pointer.
- * In case of an error @hdl->error will be set to the error code (if it
- * wasn't set already).
- */
int v4l2_ctrl_add_handler(struct v4l2_ctrl_handler *hdl,
struct v4l2_ctrl_handler *add);
-/** v4l2_ctrl_cluster() - Mark all controls in the cluster as belonging to that cluster.
- * @ncontrols: The number of controls in this cluster.
- * @controls: The cluster control array of size @ncontrols.
- */
void v4l2_ctrl_cluster(unsigned ncontrols, struct v4l2_ctrl **controls);
-/** v4l2_ctrl_auto_cluster() - Mark all controls in the cluster as belonging to
- * that cluster and set it up for autofoo/foo-type handling.
- * @ncontrols: The number of controls in this cluster.
- * @controls: The cluster control array of size @ncontrols. The first control
- * must be the 'auto' control (e.g. autogain, autoexposure, etc.)
- * @manual_val: The value for the first control in the cluster that equals the
- * manual setting.
- * @set_volatile: If true, then all controls except the first auto control will
- * be volatile.
- *
- * Use for control groups where one control selects some automatic feature and
- * the other controls are only active whenever the automatic feature is turned
- * off (manual mode). Typical examples: autogain vs gain, auto-whitebalance vs
- * red and blue balance, etc.
- *
- * The behavior of such controls is as follows:
- *
- * When the autofoo control is set to automatic, then any manual controls
- * are set to inactive and any reads will call g_volatile_ctrl (if the control
- * was marked volatile).
- *
- * When the autofoo control is set to manual, then any manual controls will
- * be marked active, and any reads will just return the current value without
- * going through g_volatile_ctrl.
- *
- * In addition, this function will set the V4L2_CTRL_FLAG_UPDATE flag
- * on the autofoo control and V4L2_CTRL_FLAG_INACTIVE on the foo control(s)
- * if autofoo is in auto mode.
- */
-void v4l2_ctrl_auto_cluster(unsigned ncontrols, struct v4l2_ctrl **controls,
- u8 manual_val, bool set_volatile);
-
-
-/** v4l2_ctrl_find() - Find a control with the given ID.
- * @hdl: The control handler.
- * @id: The control ID to find.
- *
- * If @hdl == NULL this will return NULL as well. Will lock the handler so
- * do not use from inside &v4l2_ctrl_ops.
- */
struct v4l2_ctrl *v4l2_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id);
-/** v4l2_ctrl_activate() - Make the control active or inactive.
- * @ctrl: The control to (de)activate.
- * @active: True if the control should become active.
- *
- * This sets or clears the V4L2_CTRL_FLAG_INACTIVE flag atomically.
- * Does nothing if @ctrl == NULL.
- * This will usually be called from within the s_ctrl op.
- * The V4L2_EVENT_CTRL event will be generated afterwards.
- *
- * This function assumes that the control handler is locked.
- */
void v4l2_ctrl_activate(struct v4l2_ctrl *ctrl, bool active);
-/** v4l2_ctrl_grab() - Mark the control as grabbed or not grabbed.
- * @ctrl: The control to (de)activate.
- * @grabbed: True if the control should become grabbed.
- *
- * This sets or clears the V4L2_CTRL_FLAG_GRABBED flag atomically.
- * Does nothing if @ctrl == NULL.
- * The V4L2_EVENT_CTRL event will be generated afterwards.
- * This will usually be called when starting or stopping streaming in the
- * driver.
- *
- * This function assumes that the control handler is not locked and will
- * take the lock itself.
- */
void v4l2_ctrl_grab(struct v4l2_ctrl *ctrl, bool grabbed);
-/** v4l2_ctrl_lock() - Helper function to lock the handler
- * associated with the control.
- * @ctrl: The control to lock.
- */
static inline void v4l2_ctrl_lock(struct v4l2_ctrl *ctrl)
{
mutex_lock(&ctrl->handler->lock);
}
-/** v4l2_ctrl_lock() - Helper function to unlock the handler
- * associated with the control.
- * @ctrl: The control to unlock.
- */
static inline void v4l2_ctrl_unlock(struct v4l2_ctrl *ctrl)
{
mutex_unlock(&ctrl->handler->lock);
}
-/** v4l2_ctrl_g_ctrl() - Helper function to get the control's value from within a driver.
- * @ctrl: The control.
- *
- * This returns the control's value safely by going through the control
- * framework. This function will lock the control's handler, so it cannot be
- * used from within the &v4l2_ctrl_ops functions.
- *
- * This function is for integer type controls only.
- */
s32 v4l2_ctrl_g_ctrl(struct v4l2_ctrl *ctrl);
-/** v4l2_ctrl_s_ctrl() - Helper function to set the control's value from within a driver.
- * @ctrl: The control.
- * @val: The new value.
- *
- * This set the control's new value safely by going through the control
- * framework. This function will lock the control's handler, so it cannot be
- * used from within the &v4l2_ctrl_ops functions.
- *
- * This function is for integer type controls only.
- */
int v4l2_ctrl_s_ctrl(struct v4l2_ctrl *ctrl, s32 val);
-/* Internal helper functions that deal with control events. */
-void v4l2_ctrl_add_event(struct v4l2_ctrl *ctrl,
- struct v4l2_subscribed_event *sev);
-void v4l2_ctrl_del_event(struct v4l2_ctrl *ctrl,
- struct v4l2_subscribed_event *sev);
-/* Can be used as a vidioc_log_status function that just dumps all controls
- associated with the filehandle. */
-int v4l2_ctrl_log_status(struct file *file, void *fh);
-
-/* Can be used as a vidioc_subscribe_event function that just subscribes
- control events. */
-int v4l2_ctrl_subscribe_event(struct v4l2_fh *fh,
- struct v4l2_event_subscription *sub);
-
-/* Can be used as a poll function that just polls for control events. */
-unsigned int v4l2_ctrl_poll(struct file *file, struct poll_table_struct *wait);
-
-/* Helpers for ioctl_ops. If hdl == NULL then they will all return -EINVAL. */
int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc);
int v4l2_querymenu(struct v4l2_ctrl_handler *hdl, struct v4l2_querymenu *qm);
int v4l2_g_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_control *ctrl);
-int v4l2_s_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
- struct v4l2_control *ctrl);
+int v4l2_s_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_control *ctrl);
int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *c);
int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *c);
-int v4l2_s_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
- struct v4l2_ext_controls *c);
+int v4l2_s_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *c);
-/* Helpers for subdevices. If the associated ctrl_handler == NULL then they
- will all return -EINVAL. */
int v4l2_subdev_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc);
int v4l2_subdev_querymenu(struct v4l2_subdev *sd, struct v4l2_querymenu *qm);
int v4l2_subdev_g_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs);