v4l2_ctrl_g_ctrl_int64(9)

Okay bestie, welcome to the Kernel API Manual page for v4l2_ctrl_g_ctrl_int64(9) 💖✨

🌸 NAME 🌸

v4l2_ctrl_g_ctrl_int64 — helper function to get a 64-bit control's value from within a driver. Slay.

✨ SYNOPSIS ✨

s64 v4l2_ctrl_g_ctrl_int64 (struct v4l2_ctrl *ctrl );

🎀 ARGUMENTS 🎀

• ctrl — the control. That's the whole argument, bestie. 💅

💅 DESCRIPTION 💅

Okay so this returns the control's value safely by going through the control framework. Safe, framework-approved getter energy. This function will lock the control's handler, so it cannot be used from within the v4l2_ctrl_ops functions — no cap, don't do it. Also: this function is for 64-bit integer type controls only. That's the whole vibe check. 🦋

🚨 Lowkey important: because it locks the control's handler, this helper is not your girl inside the v4l2_ctrl_ops functions. It cannot be used there.

🦋 SEE ALSO 🦋

Your required-reading group chat, with every single reference kept exactly as-is:

• Kernel file ./include/media/v4l2-ctrls.h
• union v4l2_ctrl_ptr(9), v4l2_ctrl_ptr_create(9), struct v4l2_ctrl_ops(9), struct v4l2_ctrl_type_ops(9), v4l2_ctrl_notify_fnc(9)
• struct v4l2_ctrl(9), struct v4l2_ctrl_ref(9), struct v4l2_ctrl_handler(9), struct v4l2_ctrl_config(9), v4l2_ctrl_fill(9)
• v4l2_ctrl_handler_init_class(9), v4l2_ctrl_handler_init(9), v4l2_ctrl_handler_free(9), v4l2_ctrl_lock(9), v4l2_ctrl_unlock(9)
• __v4l2_ctrl_handler_setup(9), v4l2_ctrl_handler_setup(9), v4l2_ctrl_handler_log_status(9), v4l2_ctrl_new_custom(9), v4l2_ctrl_new_std(9)
• v4l2_ctrl_new_std_menu(9), v4l2_ctrl_new_std_menu_items(9), v4l2_ctrl_new_std_compound(9), v4l2_ctrl_new_int_menu(9), v4l2_ctrl_filter(9)
• v4l2_ctrl_add_handler(9), v4l2_ctrl_radio_filter(9), v4l2_ctrl_cluster(9), v4l2_ctrl_auto_cluster(9), v4l2_ctrl_find(9)
• v4l2_ctrl_activate(9), __v4l2_ctrl_grab(9), v4l2_ctrl_grab(9), __v4l2_ctrl_modify_range(9), v4l2_ctrl_modify_range(9)
• __v4l2_ctrl_modify_dimensions(9), v4l2_ctrl_modify_dimensions(9), v4l2_ctrl_notify(9), v4l2_ctrl_get_name(9), v4l2_ctrl_get_menu(9)
• v4l2_ctrl_get_int_menu(9), v4l2_ctrl_g_ctrl(9), __v4l2_ctrl_s_ctrl(9), v4l2_ctrl_s_ctrl(9), __v4l2_ctrl_s_ctrl_int64(9)
• v4l2_ctrl_s_ctrl_int64(9), __v4l2_ctrl_s_ctrl_string(9), v4l2_ctrl_s_ctrl_string(9), __v4l2_ctrl_s_ctrl_compound(9), v4l2_ctrl_s_ctrl_compound(9)
• v4l2_ctrl_replace(9), v4l2_ctrl_merge(9), v4l2_ctrl_log_status(9), v4l2_ctrl_subscribe_event(9), v4l2_ctrl_poll(9)
• v4l2_ctrl_request_setup(9), v4l2_ctrl_request_complete(9), v4l2_ctrl_request_hdl_find(9), v4l2_ctrl_request_hdl_put(9), v4l2_ctrl_request_hdl_ctrl_find(9)
• v4l2_queryctrl(9), v4l2_query_ext_ctrl_to_v4l2_queryctrl(9), v4l2_query_ext_ctrl(9), v4l2_querymenu(9), v4l2_g_ctrl(9)
• v4l2_s_ctrl(9), v4l2_g_ext_ctrls(9), v4l2_try_ext_ctrls(9), v4l2_s_ext_ctrls(9), v4l2_ctrl_subdev_subscribe_event(9)
• v4l2_ctrl_subdev_log_status(9), v4l2_ctrl_new_fwnode_properties(9), v4l2_ctrl_type_op_equal(9), v4l2_ctrl_type_op_init(9), v4l2_ctrl_type_op_log(9), v4l2_ctrl_type_op_validate(9)

Signed off with love from the v4l2_ctrl_g_ctrl_int64(9) page in the Kernel API Manual — source path ./include/media, dated October 2026 💖🫶✨