From: Antti Palosaari Date: Mon, 25 Aug 2014 02:44:13 +0000 (-0300) Subject: [media] rtl2832_sdr: enhance sample rate debug calculation precision X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=b538a8e85b2b2fbb954da2b9189eaf18cf9098bf;p=linux-beck.git [media] rtl2832_sdr: enhance sample rate debug calculation precision Sample rate calculation gives a little bit too large results because in real life there was around one milliseconds (~one usb packet) too much data for given time. Calculate time more accurate in order to provide better results. Signed-off-by: Antti Palosaari Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/media/dvb-frontends/rtl2832_sdr.c b/drivers/media/dvb-frontends/rtl2832_sdr.c index 029189d8be88..9211ddeff227 100644 --- a/drivers/media/dvb-frontends/rtl2832_sdr.c +++ b/drivers/media/dvb-frontends/rtl2832_sdr.c @@ -365,17 +365,19 @@ static unsigned int rtl2832_sdr_convert_stream(struct rtl2832_sdr_state *s, dst_len = 0; } - /* calculate samping rate and output it in 10 seconds intervals */ + /* calculate sample rate and output it in 10 seconds intervals */ if (unlikely(time_is_before_jiffies(s->jiffies_next))) { -#define MSECS 10000UL + #define MSECS 10000UL + unsigned int msecs = jiffies_to_msecs(jiffies - + s->jiffies_next + msecs_to_jiffies(MSECS)); unsigned int samples = s->sample - s->sample_measured; s->jiffies_next = jiffies + msecs_to_jiffies(MSECS); s->sample_measured = s->sample; dev_dbg(&s->udev->dev, - "slen=%d samples=%u msecs=%lu sampling rate=%lu\n", - src_len, samples, MSECS, - samples * 1000UL / MSECS); + "slen=%u samples=%u msecs=%u sample rate=%lu\n", + src_len, samples, msecs, + samples * 1000UL / msecs); } /* total number of I+Q pairs */