set_cmatrix      1670 drivers/media/usb/gspca/sn9c20x.c 		set_cmatrix(gspca_dev, sd->brightness->val,
set_cmatrix      2028 drivers/media/usb/gspca/sn9c20x.c 	set_cmatrix(gspca_dev, v4l2_ctrl_g_ctrl(sd->brightness),