From 54c358fc23a4ca6c75bc0f8c6b3864ae16cba803 Mon Sep 17 00:00:00 2001 From: Manu Abraham Date: Mon, 2 Jul 2007 08:44:32 -0300 Subject: [PATCH] V4L/DVB (9381): On the KNC1 cards the CLOCK is clamped to a maximum limit of 90MHz, eventhough not limited in hardware, this causes instabilities at a higher clock due to issues such as thermal, also the divider wraps around, which causes the demodulator core to actually run at a lower frequency. This needs to be empirically tested whether it affects other cards. If found necessary, this parameter needs to be moved out to the config struct such that it can be made hardware dependant. Reducing the CLOCK from 99MHz to 90MHz improved the acquisition time taken on the KNC1 cards and hence such a change. Signed-off-by: Manu Abraham Signed-off-by: Mauro Carvalho Chehab --- drivers/media/dvb/frontends/stb0899_drv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/media/dvb/frontends/stb0899_drv.c b/drivers/media/dvb/frontends/stb0899_drv.c index 3cb9b48bac7e..f5cfed738e80 100644 --- a/drivers/media/dvb/frontends/stb0899_drv.c +++ b/drivers/media/dvb/frontends/stb0899_drv.c @@ -1508,7 +1508,7 @@ static enum dvbfe_search stb0899_search(struct dvb_frontend *fe, struct dvbfe_pa if (i_params->srate <= 5000000) stb0899_set_mclk(state, 76500000); else - stb0899_set_mclk(state, 99000000); + stb0899_set_mclk(state, 90000000); switch (state->delsys) { case DVBFE_DELSYS_DVBS: -- GitLab