v4l2_s_parm_cap(9)

💖 v4l2_s_parm_cap(9) 💖

okay bestie, welcome to the v4l2_s_parm_cap(9) page from the Kernel API Manual — yes, we're doing kernel media internals today, and honestly? iconic of you. 🎀

🌸 NAME 🌸

v4l2_s_parm_cap is the helper routine for vidioc_s_parm, and it fills this in by calling the set_frame_interval op of the given subdev. It only works for V4L2_BUF_TYPE_VIDEO_CAPTURE(_MPLANE), hence the _cap in the function name. no cap, literally the _cap is right there in the name 💅

✨ SYNOPSIS ✨

int v4l2_s_parm_cap (struct video_device *vdev , struct v4l2_subdev *sd
, struct v4l2_streamparm *a );

🎀 ARGUMENTS 🎀

• vdev — the struct video_device pointer. Used to determine the device caps. she's doing the vibe check on your device caps 🫶
• sd — the sub-device pointer. the subdev bestie in question ✨
• a — the VIDIOC_S_PARM argument. this is the main character argument, fr fr 🦋

🦋 SEE ALSO 🦋

Kernel file ./include/media/v4l2-common.h — and then the whole friend group:

• v4l2_ctrl_query_fill(9)
• enum v4l2_i2c_tuner_type(9)
• v4l2_i2c_new_subdev(9)
• v4l2_i2c_new_subdev_board(9)
• v4l2_i2c_subdev_set_name(9)
• v4l2_i2c_subdev_init(9)
• v4l2_i2c_subdev_addr(9)
• v4l2_i2c_tuner_addrs(9)
• v4l2_i2c_subdev_unregister(9)
• v4l2_spi_new_subdev(9)
• v4l2_spi_subdev_init(9)
• v4l2_spi_subdev_unregister(9)
• v4l_bound_align_image(9)
• v4l2_find_nearest_size_conditional(9)
• v4l2_find_nearest_size(9)
• v4l2_g_parm_cap(9)
• enum v4l2_pixel_encoding(9)
• struct v4l2_format_info(9)
• v4l2_get_link_freq(9)
• v4l2_get_active_data_lanes(9)
• v4l2_link_freq_to_bitmap(9)
• devm_v4l2_sensor_clk_get(9)
• devm_v4l2_sensor_clk_get_legacy(9)

byeee 🫶 this cutie lives in ./include/media, dated October 2026, and she's literally the v4l2_s_parm_cap(9) page. mwah 💋✨