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Commit b91a7cb0 authored by Manu Abraham's avatar Manu Abraham Committed by Mauro Carvalho Chehab
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V4L/DVB (9462): Allow specifying clock per device 



Optimizations galore: Blistering barnacles! The KNC1 and friends
like 90 Mhz clock much better rather than running at a higher
throttle, for almost similar hardware. he exact cause unknown,
possibly due to a lower voltage applied for the demod power supply.

Signed-off-by: default avatarManu Abraham <manu@linuxtv.org>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent ef3052bc

drivers/media/dvb/frontends/stb0899_drv.c

+3 −2
Original line number Diff line number Diff line
@@ -1534,6 +1534,7 @@ static enum dvbfe_search stb0899_search(struct dvb_frontend *fe, struct dvbfe_pa 
	struct stb0899_state *state = fe->demodulator_priv;

	struct stb0899_params *i_params = &state->params;

	struct stb0899_internal *internal = &state->internal;

	struct stb0899_config *config = state->config;



	u32 SearchRange, gain;
@@ -1575,9 +1576,9 @@ static enum dvbfe_search stb0899_search(struct dvb_frontend *fe, struct dvbfe_pa 
		}



		if (i_params->srate <= 5000000)

			stb0899_set_mclk(state, 76500000);

			stb0899_set_mclk(state, config->lo_clk);

		else

			stb0899_set_mclk(state, 99000000);

			stb0899_set_mclk(state, config->hi_clk);



		switch (state->delsys) {

		case DVBFE_DELSYS_DVBS:

drivers/media/dvb/frontends/stb0899_drv.h

+2 −0
Original line number Diff line number Diff line
@@ -117,6 +117,8 @@ struct stb0899_config { 
	u8	out_rate_comp;

	u8	i2c_repeater;

//	int	inversion;

	int	lo_clk;

	int	hi_clk;



	u32	esno_ave;

	u32	esno_quant;

drivers/media/dvb/ttpci/budget-av.c

+3 −0
Original line number Diff line number Diff line
@@ -1127,6 +1127,9 @@ static struct stb0899_config knc1_dvbs2_config = { 
	.xtal_freq		= 27000000,

	.inversion		= IQ_SWAP_OFF, /* 1 */



	.lo_clk			= 76500000,

	.hi_clk			= 90000000,



	.esno_ave		= STB0899_DVBS2_ESNO_AVE,

	.esno_quant		= STB0899_DVBS2_ESNO_QUANT,

	.avframes_coarse	= STB0899_DVBS2_AVFRAMES_COARSE,

drivers/media/dvb/ttpci/budget-ci.c

+3 −0
Original line number Diff line number Diff line
@@ -1312,6 +1312,9 @@ static struct stb0899_config tt3200_config = { 
	.xtal_freq		= 27000000,

	.inversion		= IQ_SWAP_ON, /* 1 */



	.lo_clk			= 76500000,

	.hi_clk			= 99000000,



	.esno_ave		= STB0899_DVBS2_ESNO_AVE,

	.esno_quant		= STB0899_DVBS2_ESNO_QUANT,

	.avframes_coarse	= STB0899_DVBS2_AVFRAMES_COARSE,