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Commit 0c1d2b14 authored by Reinhard Nißl's avatar Reinhard Nißl Committed by Mauro Carvalho Chehab
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[media] stb0899: store successful inversion for next run 



Usually, inversion doesn't change in a system. Storing the last
successful inversion value speeds up tuning of DVB-S2 transponders.

Signed-off-by: default avatarReinhard Nißl <rnissl@gmx.de>
Signed-off-by: default avatarMichael Krufky <mkrufky@linuxtv.org>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 55b3318b

drivers/media/dvb-frontends/stb0899_algo.c

+7 −1
Original line number Diff line number Diff line
@@ -1488,9 +1488,15 @@ enum stb0899_status stb0899_dvbs2_algo(struct stb0899_state *state) 


		offsetfreq = offsetfreq / ((1 << 30) / 1000);

		offsetfreq *= (internal->master_clk / 1000000);



		/* store current inversion for next run */

		reg = STB0899_READ_S2REG(STB0899_S2DEMOD, DMD_CNTRL2);

		if (STB0899_GETFIELD(SPECTRUM_INVERT, reg))

			offsetfreq *= -1;

			internal->inversion = IQ_SWAP_ON;

		else

			internal->inversion = IQ_SWAP_OFF;



		offsetfreq *= internal->inversion;



		internal->freq = internal->freq - offsetfreq;

		internal->srate = stb0899_dvbs2_get_srate(state);

drivers/media/dvb-frontends/stb0899_drv.c

+2 −3
Original line number Diff line number Diff line
@@ -1618,19 +1618,18 @@ static struct dvb_frontend_ops stb0899_ops = { 
struct dvb_frontend *stb0899_attach(struct stb0899_config *config, struct i2c_adapter *i2c)

{

	struct stb0899_state *state = NULL;

	enum stb0899_inversion inversion;



	state = kzalloc(sizeof (struct stb0899_state), GFP_KERNEL);

	if (state == NULL)

		goto error;



	inversion				= config->inversion;

	state->verbose				= &verbose;

	state->config				= config;

	state->i2c				= i2c;

	state->frontend.ops			= stb0899_ops;

	state->frontend.demodulator_priv	= state;

	state->internal.inversion		= inversion;

	/* use configured inversion as default -- we'll later autodetect inversion */

	state->internal.inversion		= config->inversion;



	stb0899_wakeup(&state->frontend);

	if (stb0899_get_dev_id(state) == -ENODEV) {