From: Manu Abraham Date: Mon, 2 Jul 2007 11:44:32 +0000 (-0300) Subject: V4L/DVB (9381): On the KNC1 cards the CLOCK is clamped to a maximum limit of 90MHz... X-Git-Tag: v2.6.29-rc1~556^2~561 X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=54c358fc23a4ca6c75bc0f8c6b3864ae16cba803;p=~emulex%2Finfiniband.git 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 --- diff --git a/drivers/media/dvb/frontends/stb0899_drv.c b/drivers/media/dvb/frontends/stb0899_drv.c index 3cb9b48bac7..f5cfed738e8 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: