From: Niklas Söderlund Date: Thu, 8 May 2025 08:37:45 +0000 (+0200) Subject: media: v4l2-common: Reduce warnings about missing V4L2_CID_LINK_FREQ control X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5a0abb8909b9dcf347fce1d201ac6686ac33fd64;p=thirdparty%2Flinux.git media: v4l2-common: Reduce warnings about missing V4L2_CID_LINK_FREQ control When operating a pipeline with a missing V4L2_CID_LINK_FREQ control this two line warning is printed each time the pipeline is started. Reduce this excessive logging by only warning once for the missing control. Signed-off-by: Niklas Söderlund Signed-off-by: Sakari Ailus Signed-off-by: Hans Verkuil --- diff --git a/drivers/media/v4l2-core/v4l2-common.c b/drivers/media/v4l2-core/v4l2-common.c index bd160a8c9efed..e1fc8fe43b74c 100644 --- a/drivers/media/v4l2-core/v4l2-common.c +++ b/drivers/media/v4l2-core/v4l2-common.c @@ -505,10 +505,10 @@ s64 __v4l2_get_link_freq_ctrl(struct v4l2_ctrl_handler *handler, freq = div_u64(v4l2_ctrl_g_ctrl_int64(ctrl) * mul, div); - pr_warn("%s: Link frequency estimated using pixel rate: result might be inaccurate\n", - __func__); - pr_warn("%s: Consider implementing support for V4L2_CID_LINK_FREQ in the transmitter driver\n", - __func__); + pr_warn_once("%s: Link frequency estimated using pixel rate: result might be inaccurate\n", + __func__); + pr_warn_once("%s: Consider implementing support for V4L2_CID_LINK_FREQ in the transmitter driver\n", + __func__); } return freq > 0 ? freq : -EINVAL;