diff options
| author | Jun Chen <jun.chen@vatics.com> | 2019-12-25 03:34:17 +0100 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2020-09-10 14:06:27 +0200 |
| commit | fc8678783c72cedd61e5de24978bcc6e147f4d77 (patch) | |
| tree | 9282389dcb98e0249a4e8d75342114a567cd9f72 /drivers/media/usb | |
| parent | a73a342a6b3cbc6a3f9f4f546bd7f796f216297a (diff) | |
media: uvcvideo: Fix annotation for uvc_video_clock_update()
The formula (2) is to convert from SOF to host clock,
it should be fix as
"TS = ((TS2 - TS1) * SOF + TS1 * SOF2 - TS2 * SOF1) / (SOF2 - SOF1)"
Signed-off-by: Jun Chen <jun.chen@vatics.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'drivers/media/usb')
| -rw-r--r-- | drivers/media/usb/uvc/uvc_video.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/media/usb/uvc/uvc_video.c b/drivers/media/usb/uvc/uvc_video.c index 6249e26e8788..a6a441d92b94 100644 --- a/drivers/media/usb/uvc/uvc_video.c +++ b/drivers/media/usb/uvc/uvc_video.c @@ -622,7 +622,7 @@ static u16 uvc_video_clock_host_sof(const struct uvc_clock_sample *sample) * to avoid losing precision in the division. Similarly, the host timestamp is * computed with * - * TS = ((TS2 - TS1) * PTS + TS1 * SOF2 - TS2 * SOF1) / (SOF2 - SOF1) (2) + * TS = ((TS2 - TS1) * SOF + TS1 * SOF2 - TS2 * SOF1) / (SOF2 - SOF1) (2) * * SOF values are coded on 11 bits by USB. We extend their precision with 16 * decimal bits, leading to a 11.16 coding. |