stv090x_set_srate
if (stv090x_set_srate(state, 1000000) < 0)
if (stv090x_set_srate(state, srate) < 0)
if (stv090x_set_srate(state, 1000000) < 0) /* initial srate = 1Msps */
if (stv090x_set_srate(state, state->srate) < 0)